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I love aviation and I love learning new things about it.

I was wondering if anyone knew all of the squawk codes and in particular what squawk 7500 means.

Here is the ultimate list of all the squawk codes (there's 4096 of them). Very few of them have a specific fixed meaning. Probably the only three that always, globally, have the exact same meaning are 7500 (unlawful interference), 7600 (communication failure) and 7700 (emergency).

1200 is used for uncontrolled VFR in the USA. 2000 and 7000 are used for uncontrolled traffic in other areas, VFR or IFR depending on the territory. 7777 is used for test transponders.

If you want to know what squawk codes are used for, you should check out this question: How does ATC know if you have been assigned a squawk or not?

Anyway, without further ado:

0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007, 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017, 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027, 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037, 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047, 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057, 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077, 0100, 0101, 0102, 0103, 0104, 0105, 0106, 0107, 0110, 0111, 0112, 0113, 0114, 0115, 0116, 0117, 0120, 0121, 0122, 0123, 0124, 0125, 0126, 0127, 0130, 0131, 0132, 0133, 0134, 0135, 0136, 0137, 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157, 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167, 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177, 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207, 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217, 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227, 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237, 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247, 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257, 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267, 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277, 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317, 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327, 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347, 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357, 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367, 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377, 0400, 0401, 0402, 0403, 0404, 0405, 0406, 0407, 0410, 0411, 0412, 0413, 0414, 0415, 0416, 0417, 0420, 0421, 0422, 0423, 0424, 0425, 0426, 0427, 0430, 0431, 0432, 0433, 0434, 0435, 0436, 0437, 0440, 0441, 0442, 0443, 0444, 0445, 0446, 0447, 0450, 0451, 0452, 0453, 0454, 0455, 0456, 0457, 0460, 0461, 0462, 0463, 0464, 0465, 0466, 0467, 0470, 0471, 0472, 0473, 0474, 0475, 0476, 0477, 0500, 0501, 0502, 0503, 0504, 0505, 0506, 0507, 0510, 0511, 0512, 0513, 0514, 0515, 0516, 0517, 0520, 0521, 0522, 0523, 0524, 0525, 0526, 0527, 0530, 0531, 0532, 0533, 0534, 0535, 0536, 0537, 0540, 0541, 0542, 0543, 0544, 0545, 0546, 0547, 0550, 0551, 0552, 0553, 0554, 0555, 0556, 0557, 0560, 0561, 0562, 0563, 0564, 0565, 0566, 0567, 0570, 0571, 0572, 0573, 0574, 0575, 0576, 0577, 0600, 0601, 0602, 0603, 0604, 0605, 0606, 0607, 0610, 0611, 0612, 0613, 0614, 0615, 0616, 0617, 0620, 0621, 0622, 0623, 0624, 0625, 0626, 0627, 0630, 0631, 0632, 0633, 0634, 0635, 0636, 0637, 0640, 0641, 0642, 0643, 0644, 0645, 0646, 0647, 0650, 0651, 0652, 0653, 0654, 0655, 0656, 0657, 0660, 0661, 0662, 0663, 0664, 0665, 0666, 0667, 0670, 0671, 0672, 0673, 0674, 0675, 0676, 0677, 0700, 0701, 0702, 0703, 0704, 0705, 0706, 0707, 0710, 0711, 0712, 0713, 0714, 0715, 0716, 0717, 0720, 0721, 0722, 0723, 0724, 0725, 0726, 0727, 0730, 0731, 0732, 0733, 0734, 0735, 0736, 0737, 0740, 0741, 0742, 0743, 0744, 0745, 0746, 0747, 0750, 0751, 0752, 0753, 0754, 0755, 0756, 0757, 0760, 0761, 0762, 0763, 0764, 0765, 0766, 0767, 0770, 0771, 0772, 0773, 0774, 0775, 0776, 0777, 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1010, 1011, 1012, 1013, 1014, 1015, 1016, 1017, 1020, 1021, 1022, 1023, 1024, 1025, 1026, 1027, 1030, 1031, 1032, 1033, 1034, 1035, 1036, 1037, 1040, 1041, 1042, 1043, 1044, 1045, 1046, 1047, 1050, 1051, 1052, 1053, 1054, 1055, 1056, 1057, 1060, 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1070, 1071, 1072, 1073, 1074, 1075, 1076, 1077, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1110, 1111, 1112, 1113, 1114, 1115, 1116, 1117, 1120, 1121, 1122, 1123, 1124, 1125, 1126, 1127, 1130, 1131, 1132, 1133, 1134, 1135, 1136, 1137, 1140, 1141, 1142, 1143, 1144, 1145, 1146, 1147, 1150, 1151, 1152, 1153, 1154, 1155, 1156, 1157, 1160, 1161, 1162, 1163, 1164, 1165, 1166, 1167, 1170, 1171, 1172, 1173, 1174, 1175, 1176, 1177, 1200, 1201, 1202, 1203, 1204, 1205, 1206, 1207, 1210, 1211, 1212, 1213, 1214, 1215, 1216, 1217, 1220, 1221, 1222, 1223, 1224, 1225, 1226, 1227, 1230, 1231, 1232, 1233, 1234, 1235, 1236, 1237, 1240, 1241, 1242, 1243, 1244, 1245, 1246, 1247, 1250, 1251, 1252, 1253, 1254, 1255, 1256, 1257, 1260, 1261, 1262, 1263, 1264, 1265, 1266, 1267, 1270, 1271, 1272, 1273, 1274, 1275, 1276, 1277, 1300, 1301, 1302, 1303, 1304, 1305, 1306, 1307, 1310, 1311, 1312, 1313, 1314, 1315, 1316, 1317, 1320, 1321, 1322, 1323, 1324, 1325, 1326, 1327, 1330, 1331, 1332, 1333, 1334, 1335, 1336, 1337, 1340, 1341, 1342, 1343, 1344, 1345, 1346, 1347, 1350, 1351, 1352, 1353, 1354, 1355, 1356, 1357, 1360, 1361, 1362, 1363, 1364, 1365, 1366, 1367, 1370, 1371, 1372, 1373, 1374, 1375, 1376, 1377, 1400, 1401, 1402, 1403, 1404, 1405, 1406, 1407, 1410, 1411, 1412, 1413, 1414, 1415, 1416, 1417, 1420, 1421, 1422, 1423, 1424, 1425, 1426, 1427, 1430, 1431, 1432, 1433, 1434, 1435, 1436, 1437, 1440, 1441, 1442, 1443, 1444, 1445, 1446, 1447, 1450, 1451, 1452, 1453, 1454, 1455, 1456, 1457, 1460, 1461, 1462, 1463, 1464, 1465, 1466, 1467, 1470, 1471, 1472, 1473, 1474, 1475, 1476, 1477, 1500, 1501, 1502, 1503, 1504, 1505, 1506, 1507, 1510, 1511, 1512, 1513, 1514, 1515, 1516, 1517, 1520, 1521, 1522, 1523, 1524, 1525, 1526, 1527, 1530, 1531, 1532, 1533, 1534, 1535, 1536, 1537, 1540, 1541, 1542, 1543, 1544, 1545, 1546, 1547, 1550, 1551, 1552, 1553, 1554, 1555, 1556, 1557, 1560, 1561, 1562, 1563, 1564, 1565, 1566, 1567, 1570, 1571, 1572, 1573, 1574, 1575, 1576, 1577, 1600, 1601, 1602, 1603, 1604, 1605, 1606, 1607, 1610, 1611, 1612, 1613, 1614, 1615, 1616, 1617, 1620, 1621, 1622, 1623, 1624, 1625, 1626, 1627, 1630, 1631, 1632, 1633, 1634, 1635, 1636, 1637, 1640, 1641, 1642, 1643, 1644, 1645, 1646, 1647, 1650, 1651, 1652, 1653, 1654, 1655, 1656, 1657, 1660, 1661, 1662, 1663, 1664, 1665, 1666, 1667, 1670, 1671, 1672, 1673, 1674, 1675, 1676, 1677, 1700, 1701, 1702, 1703, 1704, 1705, 1706, 1707, 1710, 1711, 1712, 1713, 1714, 1715, 1716, 1717, 1720, 1721, 1722, 1723, 1724, 1725, 1726, 1727, 1730, 1731, 1732, 1733, 1734, 1735, 1736, 1737, 1740, 1741, 1742, 1743, 1744, 1745, 1746, 1747, 1750, 1751, 1752, 1753, 1754, 1755, 1756, 1757, 1760, 1761, 1762, 1763, 1764, 1765, 1766, 1767, 1770, 1771, 1772, 1773, 1774, 1775, 1776, 1777, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2020, 2021, 2022, 2023, 2024, 2025, 2026, 2027, 2030, 2031, 2032, 2033, 2034, 2035, 2036, 2037, 2040, 2041, 2042, 2043, 2044, 2045, 2046, 2047, 2050, 2051, 2052, 2053, 2054, 2055, 2056, 2057, 2060, 2061, 2062, 2063, 2064, 2065, 2066, 2067, 2070, 2071, 2072, 2073, 2074, 2075, 2076, 2077, 2100, 2101, 2102, 2103, 2104, 2105, 2106, 2107, 2110, 2111, 2112, 2113, 2114, 2115, 2116, 2117, 2120, 2121, 2122, 2123, 2124, 2125, 2126, 2127, 2130, 2131, 2132, 2133, 2134, 2135, 2136, 2137, 2140, 2141, 2142, 2143, 2144, 2145, 2146, 2147, 2150, 2151, 2152, 2153, 2154, 2155, 2156, 2157, 2160, 2161, 2162, 2163, 2164, 2165, 2166, 2167, 2170, 2171, 2172, 2173, 2174, 2175, 2176, 2177, 2200, 2201, 2202, 2203, 2204, 2205, 2206, 2207, 2210, 2211, 2212, 2213, 2214, 2215, 2216, 2217, 2220, 2221, 2222, 2223, 2224, 2225, 2226, 2227, 2230, 2231, 2232, 2233, 2234, 2235, 2236, 2237, 2240, 2241, 2242, 2243, 2244, 2245, 2246, 2247, 2250, 2251, 2252, 2253, 2254, 2255, 2256, 2257, 2260, 2261, 2262, 2263, 2264, 2265, 2266, 2267, 2270, 2271, 2272, 2273, 2274, 2275, 2276, 2277, 2300, 2301, 2302, 2303, 2304, 2305, 2306, 2307, 2310, 2311, 2312, 2313, 2314, 2315, 2316, 2317, 2320, 2321, 2322, 2323, 2324, 2325, 2326, 2327, 2330, 2331, 2332, 2333, 2334, 2335, 2336, 2337, 2340, 2341, 2342, 2343, 2344, 2345, 2346, 2347, 2350, 2351, 2352, 2353, 2354, 2355, 2356, 2357, 2360, 2361, 2362, 2363, 2364, 2365, 2366, 2367, 2370, 2371, 2372, 2373, 2374, 2375, 2376, 2377, 2400, 2401, 2402, 2403, 2404, 2405, 2406, 2407, 2410, 2411, 2412, 2413, 2414, 2415, 2416, 2417, 2420, 2421, 2422, 2423, 2424, 2425, 2426, 2427, 2430, 2431, 2432, 2433, 2434, 2435, 2436, 2437, 2440, 2441, 2442, 2443, 2444, 2445, 2446, 2447, 2450, 2451, 2452, 2453, 2454, 2455, 2456, 2457, 2460, 2461, 2462, 2463, 2464, 2465, 2466, 2467, 2470, 2471, 2472, 2473, 2474, 2475, 2476, 2477, 2500, 2501, 2502, 2503, 2504, 2505, 2506, 2507, 2510, 2511, 2512, 2513, 2514, 2515, 2516, 2517, 2520, 2521, 2522, 2523, 2524, 2525, 2526, 2527, 2530, 2531, 2532, 2533, 2534, 2535, 2536, 2537, 2540, 2541, 2542, 2543, 2544, 2545, 2546, 2547, 2550, 2551, 2552, 2553, 2554, 2555, 2556, 2557, 2560, 2561, 2562, 2563, 2564, 2565, 2566, 2567, 2570, 2571, 2572, 2573, 2574, 2575, 2576, 2577, 2600, 2601, 2602, 2603, 2604, 2605, 2606, 2607, 2610, 2611, 2612, 2613, 2614, 2615, 2616, 2617, 2620, 2621, 2622, 2623, 2624, 2625, 2626, 2627, 2630, 2631, 2632, 2633, 2634, 2635, 2636, 2637, 2640, 2641, 2642, 2643, 2644, 2645, 2646, 2647, 2650, 2651, 2652, 2653, 2654, 2655, 2656, 2657, 2660, 2661, 2662, 2663, 2664, 2665, 2666, 2667, 2670, 2671, 2672, 2673, 2674, 2675, 2676, 2677, 2700, 2701, 2702, 2703, 2704, 2705, 2706, 2707, 2710, 2711, 2712, 2713, 2714, 2715, 2716, 2717, 2720, 2721, 2722, 2723, 2724, 2725, 2726, 2727, 2730, 2731, 2732, 2733, 2734, 2735, 2736, 2737, 2740, 2741, 2742, 2743, 2744, 2745, 2746, 2747, 2750, 2751, 2752, 2753, 2754, 2755, 2756, 2757, 2760, 2761, 2762, 2763, 2764, 2765, 2766, 2767, 2770, 2771, 2772, 2773, 2774, 2775, 2776, 2777, 3000, 3001, 3002, 3003, 3004, 3005, 3006, 3007, 3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3020, 3021, 3022, 3023, 3024, 3025, 3026, 3027, 3030, 3031, 3032, 3033, 3034, 3035, 3036, 3037, 3040, 3041, 3042, 3043, 3044, 3045, 3046, 3047, 3050, 3051, 3052, 3053, 3054, 3055, 3056, 3057, 3060, 3061, 3062, 3063, 3064, 3065, 3066, 3067, 3070, 3071, 3072, 3073, 3074, 3075, 3076, 3077, 3100, 3101, 3102, 3103, 3104, 3105, 3106, 3107, 3110, 3111, 3112, 3113, 3114, 3115, 3116, 3117, 3120, 3121, 3122, 3123, 3124, 3125, 3126, 3127, 3130, 3131, 3132, 3133, 3134, 3135, 3136, 3137, 3140, 3141, 3142, 3143, 3144, 3145, 3146, 3147, 3150, 3151, 3152, 3153, 3154, 3155, 3156, 3157, 3160, 3161, 3162, 3163, 3164, 3165, 3166, 3167, 3170, 3171, 3172, 3173, 3174, 3175, 3176, 3177, 3200, 3201, 3202, 3203, 3204, 3205, 3206, 3207, 3210, 3211, 3212, 3213, 3214, 3215, 3216, 3217, 3220, 3221, 3222, 3223, 3224, 3225, 3226, 3227, 3230, 3231, 3232, 3233, 3234, 3235, 3236, 3237, 3240, 3241, 3242, 3243, 3244, 3245, 3246, 3247, 3250, 3251, 3252, 3253, 3254, 3255, 3256, 3257, 3260, 3261, 3262, 3263, 3264, 3265, 3266, 3267, 3270, 3271, 3272, 3273, 3274, 3275, 3276, 3277, 3300, 3301, 3302, 3303, 3304, 3305, 3306, 3307, 3310, 3311, 3312, 3313, 3314, 3315, 3316, 3317, 3320, 3321, 3322, 3323, 3324, 3325, 3326, 3327, 3330, 3331, 3332, 3333, 3334, 3335, 3336, 3337, 3340, 3341, 3342, 3343, 3344, 3345, 3346, 3347, 3350, 3351, 3352, 3353, 3354, 3355, 3356, 3357, 3360, 3361, 3362, 3363, 3364, 3365, 3366, 3367, 3370, 3371, 3372, 3373, 3374, 3375, 3376, 3377, 3400, 3401, 3402, 3403, 3404, 3405, 3406, 3407, 3410, 3411, 3412, 3413, 3414, 3415, 3416, 3417, 3420, 3421, 3422, 3423, 3424, 3425, 3426, 3427, 3430, 3431, 3432, 3433, 3434, 3435, 3436, 3437, 3440, 3441, 3442, 3443, 3444, 3445, 3446, 3447, 3450, 3451, 3452, 3453, 3454, 3455, 3456, 3457, 3460, 3461, 3462, 3463, 3464, 3465, 3466, 3467, 3470, 3471, 3472, 3473, 3474, 3475, 3476, 3477, 3500, 3501, 3502, 3503, 3504, 3505, 3506, 3507, 3510, 3511, 3512, 3513, 3514, 3515, 3516, 3517, 3520, 3521, 3522, 3523, 3524, 3525, 3526, 3527, 3530, 3531, 3532, 3533, 3534, 3535, 3536, 3537, 3540, 3541, 3542, 3543, 3544, 3545, 3546, 3547, 3550, 3551, 3552, 3553, 3554, 3555, 3556, 3557, 3560, 3561, 3562, 3563, 3564, 3565, 3566, 3567, 3570, 3571, 3572, 3573, 3574, 3575, 3576, 3577, 3600, 3601, 3602, 3603, 3604, 3605, 3606, 3607, 3610, 3611, 3612, 3613, 3614, 3615, 3616, 3617, 3620, 3621, 3622, 3623, 3624, 3625, 3626, 3627, 3630, 3631, 3632, 3633, 3634, 3635, 3636, 3637, 3640, 3641, 3642, 3643, 3644, 3645, 3646, 3647, 3650, 3651, 3652, 3653, 3654, 3655, 3656, 3657, 3660, 3661, 3662, 3663, 3664, 3665, 3666, 3667, 3670, 3671, 3672, 3673, 3674, 3675, 3676, 3677, 3700, 3701, 3702, 3703, 3704, 3705, 3706, 3707, 3710, 3711, 3712, 3713, 3714, 3715, 3716, 3717, 3720, 3721, 3722, 3723, 3724, 3725, 3726, 3727, 3730, 3731, 3732, 3733, 3734, 3735, 3736, 3737, 3740, 3741, 3742, 3743, 3744, 3745, 3746, 3747, 3750, 3751, 3752, 3753, 3754, 3755, 3756, 3757, 3760, 3761, 3762, 3763, 3764, 3765, 3766, 3767, 3770, 3771, 3772, 3773, 3774, 3775, 3776, 3777, 4000, 4001, 4002, 4003, 4004, 4005, 4006, 4007, 4010, 4011, 4012, 4013, 4014, 4015, 4016, 4017, 4020, 4021, 4022, 4023, 4024, 4025, 4026, 4027, 4030, 4031, 4032, 4033, 4034, 4035, 4036, 4037, 4040, 4041, 4042, 4043, 4044, 4045, 4046, 4047, 4050, 4051, 4052, 4053, 4054, 4055, 4056, 4057, 4060, 4061, 4062, 4063, 4064, 4065, 4066, 4067, 4070, 4071, 4072, 4073, 4074, 4075, 4076, 4077, 4100, 4101, 4102, 4103, 4104, 4105, 4106, 4107, 4110, 4111, 4112, 4113, 4114, 4115, 4116, 4117, 4120, 4121, 4122, 4123, 4124, 4125, 4126, 4127, 4130, 4131, 4132, 4133, 4134, 4135, 4136, 4137, 4140, 4141, 4142, 4143, 4144, 4145, 4146, 4147, 4150, 4151, 4152, 4153, 4154, 4155, 4156, 4157, 4160, 4161, 4162, 4163, 4164, 4165, 4166, 4167, 4170, 4171, 4172, 4173, 4174, 4175, 4176, 4177, 4200, 4201, 4202, 4203, 4204, 4205, 4206, 4207, 4210, 4211, 4212, 4213, 4214, 4215, 4216, 4217, 4220, 4221, 4222, 4223, 4224, 4225, 4226, 4227, 4230, 4231, 4232, 4233, 4234, 4235, 4236, 4237, 4240, 4241, 4242, 4243, 4244, 4245, 4246, 4247, 4250, 4251, 4252, 4253, 4254, 4255, 4256, 4257, 4260, 4261, 4262, 4263, 4264, 4265, 4266, 4267, 4270, 4271, 4272, 4273, 4274, 4275, 4276, 4277, 4300, 4301, 4302, 4303, 4304, 4305, 4306, 4307, 4310, 4311, 4312, 4313, 4314, 4315, 4316, 4317, 4320, 4321, 4322, 4323, 4324, 4325, 4326, 4327, 4330, 4331, 4332, 4333, 4334, 4335, 4336, 4337, 4340, 4341, 4342, 4343, 4344, 4345, 4346, 4347, 4350, 4351, 4352, 4353, 4354, 4355, 4356, 4357, 4360, 4361, 4362, 4363, 4364, 4365, 4366, 4367, 4370, 4371, 4372, 4373, 4374, 4375, 4376, 4377, 4400, 4401, 4402, 4403, 4404, 4405, 4406, 4407, 4410, 4411, 4412, 4413, 4414, 4415, 4416, 4417, 4420, 4421, 4422, 4423, 4424, 4425, 4426, 4427, 4430, 4431, 4432, 4433, 4434, 4435, 4436, 4437, 4440, 4441, 4442, 4443, 4444, 4445, 4446, 4447, 4450, 4451, 4452, 4453, 4454, 4455, 4456, 4457, 4460, 4461, 4462, 4463, 4464, 4465, 4466, 4467, 4470, 4471, 4472, 4473, 4474, 4475, 4476, 4477, 4500, 4501, 4502, 4503, 4504, 4505, 4506, 4507, 4510, 4511, 4512, 4513, 4514, 4515, 4516, 4517, 4520, 4521, 4522, 4523, 4524, 4525, 4526, 4527, 4530, 4531, 4532, 4533, 4534, 4535, 4536, 4537, 4540, 4541, 4542, 4543, 4544, 4545, 4546, 4547, 4550, 4551, 4552, 4553, 4554, 4555, 4556, 4557, 4560, 4561, 4562, 4563, 4564, 4565, 4566, 4567, 4570, 4571, 4572, 4573, 4574, 4575, 4576, 4577, 4600, 4601, 4602, 4603, 4604, 4605, 4606, 4607, 4610, 4611, 4612, 4613, 4614, 4615, 4616, 4617, 4620, 4621, 4622, 4623, 4624, 4625, 4626, 4627, 4630, 4631, 4632, 4633, 4634, 4635, 4636, 4637, 4640, 4641, 4642, 4643, 4644, 4645, 4646, 4647, 4650, 4651, 4652, 4653, 4654, 4655, 4656, 4657, 4660, 4661, 4662, 4663, 4664, 4665, 4666, 4667, 4670, 4671, 4672, 4673, 4674, 4675, 4676, 4677, 4700, 4701, 4702, 4703, 4704, 4705, 4706, 4707, 4710, 4711, 4712, 4713, 4714, 4715, 4716, 4717, 4720, 4721, 4722, 4723, 4724, 4725, 4726, 4727, 4730, 4731, 4732, 4733, 4734, 4735, 4736, 4737, 4740, 4741, 4742, 4743, 4744, 4745, 4746, 4747, 4750, 4751, 4752, 4753, 4754, 4755, 4756, 4757, 4760, 4761, 4762, 4763, 4764, 4765, 4766, 4767, 4770, 4771, 4772, 4773, 4774, 4775, 4776, 4777, 5000, 5001, 5002, 5003, 5004, 5005, 5006, 5007, 5010, 5011, 5012, 5013, 5014, 5015, 5016, 5017, 5020, 5021, 5022, 5023, 5024, 5025, 5026, 5027, 5030, 5031, 5032, 5033, 5034, 5035, 5036, 5037, 5040, 5041, 5042, 5043, 5044, 5045, 5046, 5047, 5050, 5051, 5052, 5053, 5054, 5055, 5056, 5057, 5060, 5061, 5062, 5063, 5064, 5065, 5066, 5067, 5070, 5071, 5072, 5073, 5074, 5075, 5076, 5077, 5100, 5101, 5102, 5103, 5104, 5105, 5106, 5107, 5110, 5111, 5112, 5113, 5114, 5115, 5116, 5117, 5120, 5121, 5122, 5123, 5124, 5125, 5126, 5127, 5130, 5131, 5132, 5133, 5134, 5135, 5136, 5137, 5140, 5141, 5142, 5143, 5144, 5145, 5146, 5147, 5150, 5151, 5152, 5153, 5154, 5155, 5156, 5157, 5160, 5161, 5162, 5163, 5164, 5165, 5166, 5167, 5170, 5171, 5172, 5173, 5174, 5175, 5176, 5177, 5200, 5201, 5202, 5203, 5204, 5205, 5206, 5207, 5210, 5211, 5212, 5213, 5214, 5215, 5216, 5217, 5220, 5221, 5222, 5223, 5224, 5225, 5226, 5227, 5230, 5231, 5232, 5233, 5234, 5235, 5236, 5237, 5240, 5241, 5242, 5243, 5244, 5245, 5246, 5247, 5250, 5251, 5252, 5253, 5254, 5255, 5256, 5257, 5260, 5261, 5262, 5263, 5264, 5265, 5266, 5267, 5270, 5271, 5272, 5273, 5274, 5275, 5276, 5277, 5300, 5301, 5302, 5303, 5304, 5305, 5306, 5307, 5310, 5311, 5312, 5313, 5314, 5315, 5316, 5317, 5320, 5321, 5322, 5323, 5324, 5325, 5326, 5327, 5330, 5331, 5332, 5333, 5334, 5335, 5336, 5337, 5340, 5341, 5342, 5343, 5344, 5345, 5346, 5347, 5350, 5351, 5352, 5353, 5354, 5355, 5356, 5357, 5360, 5361, 5362, 5363, 5364, 5365, 5366, 5367, 5370, 5371, 5372, 5373, 5374, 5375, 5376, 5377, 5400, 5401, 5402, 5403, 5404, 5405, 5406, 5407, 5410, 5411, 5412, 5413, 5414, 5415, 5416, 5417, 5420, 5421, 5422, 5423, 5424, 5425, 5426, 5427, 5430, 5431, 5432, 5433, 5434, 5435, 5436, 5437, 5440, 5441, 5442, 5443, 5444, 5445, 5446, 5447, 5450, 5451, 5452, 5453, 5454, 5455, 5456, 5457, 5460, 5461, 5462, 5463, 5464, 5465, 5466, 5467, 5470, 5471, 5472, 5473, 5474, 5475, 5476, 5477, 5500, 5501, 5502, 5503, 5504, 5505, 5506, 5507, 5510, 5511, 5512, 5513, 5514, 5515, 5516, 5517, 5520, 5521, 5522, 5523, 5524, 5525, 5526, 5527, 5530, 5531, 5532, 5533, 5534, 5535, 5536, 5537, 5540, 5541, 5542, 5543, 5544, 5545, 5546, 5547, 5550, 5551, 5552, 5553, 5554, 5555, 5556, 5557, 5560, 5561, 5562, 5563, 5564, 5565, 5566, 5567, 5570, 5571, 5572, 5573, 5574, 5575, 5576, 5577, 5600, 5601, 5602, 5603, 5604, 5605, 5606, 5607, 5610, 5611, 5612, 5613, 5614, 5615, 5616, 5617, 5620, 5621, 5622, 5623, 5624, 5625, 5626, 5627, 5630, 5631, 5632, 5633, 5634, 5635, 5636, 5637, 5640, 5641, 5642, 5643, 5644, 5645, 5646, 5647, 5650, 5651, 5652, 5653, 5654, 5655, 5656, 5657, 5660, 5661, 5662, 5663, 5664, 5665, 5666, 5667, 5670, 5671, 5672, 5673, 5674, 5675, 5676, 5677, 5700, 5701, 5702, 5703, 5704, 5705, 5706, 5707, 5710, 5711, 5712, 5713, 5714, 5715, 5716, 5717, 5720, 5721, 5722, 5723, 5724, 5725, 5726, 5727, 5730, 5731, 5732, 5733, 5734, 5735, 5736, 5737, 5740, 5741, 5742, 5743, 5744, 5745, 5746, 5747, 5750, 5751, 5752, 5753, 5754, 5755, 5756, 5757, 5760, 5761, 5762, 5763, 5764, 5765, 5766, 5767, 5770, 5771, 5772, 5773, 5774, 5775, 5776, 5777, 6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6010, 6011, 6012, 6013, 6014, 6015, 6016, 6017, 6020, 6021, 6022, 6023, 6024, 6025, 6026, 6027, 6030, 6031, 6032, 6033, 6034, 6035, 6036, 6037, 6040, 6041, 6042, 6043, 6044, 6045, 6046, 6047, 6050, 6051, 6052, 6053, 6054, 6055, 6056, 6057, 6060, 6061, 6062, 6063, 6064, 6065, 6066, 6067, 6070, 6071, 6072, 6073, 6074, 6075, 6076, 6077, 6100, 6101, 6102, 6103, 6104, 6105, 6106, 6107, 6110, 6111, 6112, 6113, 6114, 6115, 6116, 6117, 6120, 6121, 6122, 6123, 6124, 6125, 6126, 6127, 6130, 6131, 6132, 6133, 6134, 6135, 6136, 6137, 6140, 6141, 6142, 6143, 6144, 6145, 6146, 6147, 6150, 6151, 6152, 6153, 6154, 6155, 6156, 6157, 6160, 6161, 6162, 6163, 6164, 6165, 6166, 6167, 6170, 6171, 6172, 6173, 6174, 6175, 6176, 6177, 6200, 6201, 6202, 6203, 6204, 6205, 6206, 6207, 6210, 6211, 6212, 6213, 6214, 6215, 6216, 6217, 6220, 6221, 6222, 6223, 6224, 6225, 6226, 6227, 6230, 6231, 6232, 6233, 6234, 6235, 6236, 6237, 6240, 6241, 6242, 6243, 6244, 6245, 6246, 6247, 6250, 6251, 6252, 6253, 6254, 6255, 6256, 6257, 6260, 6261, 6262, 6263, 6264, 6265, 6266, 6267, 6270, 6271, 6272, 6273, 6274, 6275, 6276, 6277, 6300, 6301, 6302, 6303, 6304, 6305, 6306, 6307, 6310, 6311, 6312, 6313, 6314, 6315, 6316, 6317, 6320, 6321, 6322, 6323, 6324, 6325, 6326, 6327, 6330, 6331, 6332, 6333, 6334, 6335, 6336, 6337, 6340, 6341, 6342, 6343, 6344, 6345, 6346, 6347, 6350, 6351, 6352, 6353, 6354, 6355, 6356, 6357, 6360, 6361, 6362, 6363, 6364, 6365, 6366, 6367, 6370, 6371, 6372, 6373, 6374, 6375, 6376, 6377, 6400, 6401, 6402, 6403, 6404, 6405, 6406, 6407, 6410, 6411, 6412, 6413, 6414, 6415, 6416, 6417, 6420, 6421, 6422, 6423, 6424, 6425, 6426, 6427, 6430, 6431, 6432, 6433, 6434, 6435, 6436, 6437, 6440, 6441, 6442, 6443, 6444, 6445, 6446, 6447, 6450, 6451, 6452, 6453, 6454, 6455, 6456, 6457, 6460, 6461, 6462, 6463, 6464, 6465, 6466, 6467, 6470, 6471, 6472, 6473, 6474, 6475, 6476, 6477, 6500, 6501, 6502, 6503, 6504, 6505, 6506, 6507, 6510, 6511, 6512, 6513, 6514, 6515, 6516, 6517, 6520, 6521, 6522, 6523, 6524, 6525, 6526, 6527, 6530, 6531, 6532, 6533, 6534, 6535, 6536, 6537, 6540, 6541, 6542, 6543, 6544, 6545, 6546, 6547, 6550, 6551, 6552, 6553, 6554, 6555, 6556, 6557, 6560, 6561, 6562, 6563, 6564, 6565, 6566, 6567, 6570, 6571, 6572, 6573, 6574, 6575, 6576, 6577, 6600, 6601, 6602, 6603, 6604, 6605, 6606, 6607, 6610, 6611, 6612, 6613, 6614, 6615, 6616, 6617, 6620, 6621, 6622, 6623, 6624, 6625, 6626, 6627, 6630, 6631, 6632, 6633, 6634, 6635, 6636, 6637, 6640, 6641, 6642, 6643, 6644, 6645, 6646, 6647, 6650, 6651, 6652, 6653, 6654, 6655, 6656, 6657, 6660, 6661, 6662, 6663, 6664, 6665, 6666, 6667, 6670, 6671, 6672, 6673, 6674, 6675, 6676, 6677, 6700, 6701, 6702, 6703, 6704, 6705, 6706, 6707, 6710, 6711, 6712, 6713, 6714, 6715, 6716, 6717, 6720, 6721, 6722, 6723, 6724, 6725, 6726, 6727, 6730, 6731, 6732, 6733, 6734, 6735, 6736, 6737, 6740, 6741, 6742, 6743, 6744, 6745, 6746, 6747, 6750, 6751, 6752, 6753, 6754, 6755, 6756, 6757, 6760, 6761, 6762, 6763, 6764, 6765, 6766, 6767, 6770, 6771, 6772, 6773, 6774, 6775, 6776, 6777, 7000, 7001, 7002, 7003, 7004, 7005, 7006, 7007, 7010, 7011, 7012, 7013, 7014, 7015, 7016, 7017, 7020, 7021, 7022, 7023, 7024, 7025, 7026, 7027, 7030, 7031, 7032, 7033, 7034, 7035, 7036, 7037, 7040, 7041, 7042, 7043, 7044, 7045, 7046, 7047, 7050, 7051, 7052, 7053, 7054, 7055, 7056, 7057, 7060, 7061, 7062, 7063, 7064, 7065, 7066, 7067, 7070, 7071, 7072, 7073, 7074, 7075, 7076, 7077, 7100, 7101, 7102, 7103, 7104, 7105, 7106, 7107, 7110, 7111, 7112, 7113, 7114, 7115, 7116, 7117, 7120, 7121, 7122, 7123, 7124, 7125, 7126, 7127, 7130, 7131, 7132, 7133, 7134, 7135, 7136, 7137, 7140, 7141, 7142, 7143, 7144, 7145, 7146, 7147, 7150, 7151, 7152, 7153, 7154, 7155, 7156, 7157, 7160, 7161, 7162, 7163, 7164, 7165, 7166, 7167, 7170, 7171, 7172, 7173, 7174, 7175, 7176, 7177, 7200, 7201, 7202, 7203, 7204, 7205, 7206, 7207, 7210, 7211, 7212, 7213, 7214, 7215, 7216, 7217, 7220, 7221, 7222, 7223, 7224, 7225, 7226, 7227, 7230, 7231, 7232, 7233, 7234, 7235, 7236, 7237, 7240, 7241, 7242, 7243, 7244, 7245, 7246, 7247, 7250, 7251, 7252, 7253, 7254, 7255, 7256, 7257, 7260, 7261, 7262, 7263, 7264, 7265, 7266, 7267, 7270, 7271, 7272, 7273, 7274, 7275, 7276, 7277, 7300, 7301, 7302, 7303, 7304, 7305, 7306, 7307, 7310, 7311, 7312, 7313, 7314, 7315, 7316, 7317, 7320, 7321, 7322, 7323, 7324, 7325, 7326, 7327, 7330, 7331, 7332, 7333, 7334, 7335, 7336, 7337, 7340, 7341, 7342, 7343, 7344, 7345, 7346, 7347, 7350, 7351, 7352, 7353, 7354, 7355, 7356, 7357, 7360, 7361, 7362, 7363, 7364, 7365, 7366, 7367, 7370, 7371, 7372, 7373, 7374, 7375, 7376, 7377, 7400, 7401, 7402, 7403, 7404, 7405, 7406, 7407, 7410, 7411, 7412, 7413, 7414, 7415, 7416, 7417, 7420, 7421, 7422, 7423, 7424, 7425, 7426, 7427, 7430, 7431, 7432, 7433, 7434, 7435, 7436, 7437, 7440, 7441, 7442, 7443, 7444, 7445, 7446, 7447, 7450, 7451, 7452, 7453, 7454, 7455, 7456, 7457, 7460, 7461, 7462, 7463, 7464, 7465, 7466, 7467, 7470, 7471, 7472, 7473, 7474, 7475, 7476, 7477, 7500, 7501, 7502, 7503, 7504, 7505, 7506, 7507, 7510, 7511, 7512, 7513, 7514, 7515, 7516, 7517, 7520, 7521, 7522, 7523, 7524, 7525, 7526, 7527, 7530, 7531, 7532, 7533, 7534, 7535, 7536, 7537, 7540, 7541, 7542, 7543, 7544, 7545, 7546, 7547, 7550, 7551, 7552, 7553, 7554, 7555, 7556, 7557, 7560, 7561, 7562, 7563, 7564, 7565, 7566, 7567, 7570, 7571, 7572, 7573, 7574, 7575, 7576, 7577, 7600, 7601, 7602, 7603, 7604, 7605, 7606, 7607, 7610, 7611, 7612, 7613, 7614, 7615, 7616, 7617, 7620, 7621, 7622, 7623, 7624, 7625, 7626, 7627, 7630, 7631, 7632, 7633, 7634, 7635, 7636, 7637, 7640, 7641, 7642, 7643, 7644, 7645, 7646, 7647, 7650, 7651, 7652, 7653, 7654, 7655, 7656, 7657, 7660, 7661, 7662, 7663, 7664, 7665, 7666, 7667, 7670, 7671, 7672, 7673, 7674, 7675, 7676, 7677, 7700, 7701, 7702, 7703, 7704, 7705, 7706, 7707, 7710, 7711, 7712, 7713, 7714, 7715, 7716, 7717, 7720, 7721, 7722, 7723, 7724, 7725, 7726, 7727, 7730, 7731, 7732, 7733, 7734, 7735, 7736, 7737, 7740, 7741, 7742, 7743, 7744, 7745, 7746, 7747, 7750, 7751, 7752, 7753, 7754, 7755, 7756, 7757, 7760, 7761, 7762, 7763, 7764, 7765, 7766, 7767, 7770, 7771, 7772, 7773, 7774, 7775, 7776, 7777

7500 hijack
7600 no radio
7700 emergency

If you really want to learn, reading the FAR and AIM will really get you up to speed

http://www.faraim.org/