A PO BOX number can be less than or more than four digit. For post office boxes, the general rule is that each box has its own ZIP+4 code.
The last four digit is often one of the following:
1. Zero plus the last three digits of the box number (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. The last four digits of the box number (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. If the box number is less than four digits, enough zeros prepended to the front of the box number to produce a four-digit number(eg. PO BOX 1, Shreveport LA 71161-0001).
However, there is no uniform rule, the zip code plus four is for reference only, the ZIP+4 code must be looked up individually for each box in the USPS offical website.
PO BOX 27261, SAN DIEGO, CA 92198-1261
PO BOX 27262, SAN DIEGO, CA 92198-1262
PO BOX 27263, SAN DIEGO, CA 92198-1263
PO BOX 27264, SAN DIEGO, CA 92198-1264
PO BOX 27265, SAN DIEGO, CA 92198-1265
PO BOX 27266, SAN DIEGO, CA 92198-1266
PO BOX 27267, SAN DIEGO, CA 92198-1267
PO BOX 27268, SAN DIEGO, CA 92198-1268
PO BOX 27269, SAN DIEGO, CA 92198-1269
PO BOX 27270, SAN DIEGO, CA 92198-1270
PO BOX 27271, SAN DIEGO, CA 92198-1271
PO BOX 27272, SAN DIEGO, CA 92198-1272
PO BOX 27273, SAN DIEGO, CA 92198-1273
PO BOX 27274, SAN DIEGO, CA 92198-1274
PO BOX 27275, SAN DIEGO, CA 92198-1275
PO BOX 27276, SAN DIEGO, CA 92198-1276
PO BOX 27277, SAN DIEGO, CA 92198-1277
PO BOX 27278, SAN DIEGO, CA 92198-1278
PO BOX 27279, SAN DIEGO, CA 92198-1279
PO BOX 27280, SAN DIEGO, CA 92198-1280
PO BOX 27281, SAN DIEGO, CA 92198-1281
PO BOX 27282, SAN DIEGO, CA 92198-1282
PO BOX 27283, SAN DIEGO, CA 92198-1283
PO BOX 27284, SAN DIEGO, CA 92198-1284
PO BOX 27285, SAN DIEGO, CA 92198-1285
PO BOX 27286, SAN DIEGO, CA 92198-1286
PO BOX 27287, SAN DIEGO, CA 92198-1287
PO BOX 27288, SAN DIEGO, CA 92198-1288
PO BOX 27289, SAN DIEGO, CA 92198-1289
PO BOX 27290, SAN DIEGO, CA 92198-1290
PO BOX 27291, SAN DIEGO, CA 92198-1291
PO BOX 27292, SAN DIEGO, CA 92198-1292
PO BOX 27293, SAN DIEGO, CA 92198-1293
PO BOX 27294, SAN DIEGO, CA 92198-1294
PO BOX 27295, SAN DIEGO, CA 92198-1295
PO BOX 27296, SAN DIEGO, CA 92198-1296
PO BOX 27297, SAN DIEGO, CA 92198-1297
PO BOX 27298, SAN DIEGO, CA 92198-1298
PO BOX 27299, SAN DIEGO, CA 92198-1299
PO BOX 27300, SAN DIEGO, CA 92198-1300
PO BOX 27301, SAN DIEGO, CA 92198-1301
PO BOX 27302, SAN DIEGO, CA 92198-1302
PO BOX 27303, SAN DIEGO, CA 92198-1303
PO BOX 27304, SAN DIEGO, CA 92198-1304
PO BOX 27305, SAN DIEGO, CA 92198-1305
PO BOX 27306, SAN DIEGO, CA 92198-1306
PO BOX 27307, SAN DIEGO, CA 92198-1307
PO BOX 27308, SAN DIEGO, CA 92198-1308
PO BOX 27309, SAN DIEGO, CA 92198-1309
PO BOX 27310, SAN DIEGO, CA 92198-1310
PO BOX 27311, SAN DIEGO, CA 92198-1311
PO BOX 27312, SAN DIEGO, CA 92198-1312
PO BOX 27313, SAN DIEGO, CA 92198-1313
PO BOX 27314, SAN DIEGO, CA 92198-1314
PO BOX 27315, SAN DIEGO, CA 92198-1315
PO BOX 27316, SAN DIEGO, CA 92198-1316
PO BOX 27317, SAN DIEGO, CA 92198-1317
PO BOX 27318, SAN DIEGO, CA 92198-1318
PO BOX 27319, SAN DIEGO, CA 92198-1319
PO BOX 27320, SAN DIEGO, CA 92198-1320
PO BOX 27321, SAN DIEGO, CA 92198-1321
PO BOX 27322, SAN DIEGO, CA 92198-1322
PO BOX 27323, SAN DIEGO, CA 92198-1323
PO BOX 27324, SAN DIEGO, CA 92198-1324
PO BOX 27325, SAN DIEGO, CA 92198-1325
PO BOX 27326, SAN DIEGO, CA 92198-1326
PO BOX 27327, SAN DIEGO, CA 92198-1327
PO BOX 27328, SAN DIEGO, CA 92198-1328
PO BOX 27329, SAN DIEGO, CA 92198-1329
PO BOX 27330, SAN DIEGO, CA 92198-1330
PO BOX 27331, SAN DIEGO, CA 92198-1331
PO BOX 27332, SAN DIEGO, CA 92198-1332
PO BOX 27333, SAN DIEGO, CA 92198-1333
PO BOX 27334, SAN DIEGO, CA 92198-1334
PO BOX 27335, SAN DIEGO, CA 92198-1335
PO BOX 27336, SAN DIEGO, CA 92198-1336
PO BOX 27337, SAN DIEGO, CA 92198-1337
PO BOX 27338, SAN DIEGO, CA 92198-1338
PO BOX 27339, SAN DIEGO, CA 92198-1339
PO BOX 27340, SAN DIEGO, CA 92198-1340
PO BOX 27341, SAN DIEGO, CA 92198-1341
PO BOX 27342, SAN DIEGO, CA 92198-1342
PO BOX 27343, SAN DIEGO, CA 92198-1343
PO BOX 27344, SAN DIEGO, CA 92198-1344
PO BOX 27345, SAN DIEGO, CA 92198-1345
PO BOX 27346, SAN DIEGO, CA 92198-1346
PO BOX 27347, SAN DIEGO, CA 92198-1347
PO BOX 27348, SAN DIEGO, CA 92198-1348
PO BOX 27349, SAN DIEGO, CA 92198-1349
PO BOX 27350, SAN DIEGO, CA 92198-1350
PO BOX 27351, SAN DIEGO, CA 92198-1351
PO BOX 27352, SAN DIEGO, CA 92198-1352
PO BOX 27353, SAN DIEGO, CA 92198-1353
PO BOX 27354, SAN DIEGO, CA 92198-1354
PO BOX 27355, SAN DIEGO, CA 92198-1355
PO BOX 27356, SAN DIEGO, CA 92198-1356
PO BOX 27357, SAN DIEGO, CA 92198-1357
PO BOX 27358, SAN DIEGO, CA 92198-1358
PO BOX 27359, SAN DIEGO, CA 92198-1359
PO BOX 27360, SAN DIEGO, CA 92198-1360
PO BOX 27361, SAN DIEGO, CA 92198-1361
PO BOX 27362, SAN DIEGO, CA 92198-1362
PO BOX 27363, SAN DIEGO, CA 92198-1363
PO BOX 27364, SAN DIEGO, CA 92198-1364
PO BOX 27365, SAN DIEGO, CA 92198-1365
PO BOX 27366, SAN DIEGO, CA 92198-1366
PO BOX 27367, SAN DIEGO, CA 92198-1367
PO BOX 27368, SAN DIEGO, CA 92198-1368
PO BOX 27369, SAN DIEGO, CA 92198-1369
PO BOX 27370, SAN DIEGO, CA 92198-1370
PO BOX 27371, SAN DIEGO, CA 92198-1371
PO BOX 27372, SAN DIEGO, CA 92198-1372
PO BOX 27373, SAN DIEGO, CA 92198-1373
PO BOX 27374, SAN DIEGO, CA 92198-1374
PO BOX 27375, SAN DIEGO, CA 92198-1375
PO BOX 27376, SAN DIEGO, CA 92198-1376
PO BOX 27377, SAN DIEGO, CA 92198-1377
PO BOX 27378, SAN DIEGO, CA 92198-1378
PO BOX 27379, SAN DIEGO, CA 92198-1379
PO BOX 27380, SAN DIEGO, CA 92198-1380
PO BOX 27381, SAN DIEGO, CA 92198-1381
PO BOX 27382, SAN DIEGO, CA 92198-1382
PO BOX 27383, SAN DIEGO, CA 92198-1383
PO BOX 27384, SAN DIEGO, CA 92198-1384
PO BOX 27385, SAN DIEGO, CA 92198-1385
PO BOX 27386, SAN DIEGO, CA 92198-1386
PO BOX 27387, SAN DIEGO, CA 92198-1387
PO BOX 27388, SAN DIEGO, CA 92198-1388
PO BOX 27389, SAN DIEGO, CA 92198-1389
PO BOX 27390, SAN DIEGO, CA 92198-1390
PO BOX 27391, SAN DIEGO, CA 92198-1391
PO BOX 27392, SAN DIEGO, CA 92198-1392
PO BOX 27393, SAN DIEGO, CA 92198-1393
PO BOX 27394, SAN DIEGO, CA 92198-1394
PO BOX 27395, SAN DIEGO, CA 92198-1395
PO BOX 27396, SAN DIEGO, CA 92198-1396
PO BOX 27397, SAN DIEGO, CA 92198-1397
PO BOX 27398, SAN DIEGO, CA 92198-1398
PO BOX 27399, SAN DIEGO, CA 92198-1399
PO BOX 27400, SAN DIEGO, CA 92198-1400
PO BOX 27401, SAN DIEGO, CA 92198-1401
PO BOX 27402, SAN DIEGO, CA 92198-1402
PO BOX 27403, SAN DIEGO, CA 92198-1403
PO BOX 27404, SAN DIEGO, CA 92198-1404
PO BOX 27405, SAN DIEGO, CA 92198-1405
PO BOX 27406, SAN DIEGO, CA 92198-1406
PO BOX 27407, SAN DIEGO, CA 92198-1407
PO BOX 27408, SAN DIEGO, CA 92198-1408
PO BOX 27409, SAN DIEGO, CA 92198-1409
PO BOX 27410, SAN DIEGO, CA 92198-1410
PO BOX 27411, SAN DIEGO, CA 92198-1411
PO BOX 27412, SAN DIEGO, CA 92198-1412
PO BOX 27413, SAN DIEGO, CA 92198-1413
PO BOX 27414, SAN DIEGO, CA 92198-1414
PO BOX 27415, SAN DIEGO, CA 92198-1415
PO BOX 27416, SAN DIEGO, CA 92198-1416
PO BOX 27417, SAN DIEGO, CA 92198-1417
PO BOX 27418, SAN DIEGO, CA 92198-1418
PO BOX 27419, SAN DIEGO, CA 92198-1419
PO BOX 27420, SAN DIEGO, CA 92198-1420
PO BOX 27421, SAN DIEGO, CA 92198-1421
PO BOX 27422, SAN DIEGO, CA 92198-1422
PO BOX 27423, SAN DIEGO, CA 92198-1423
PO BOX 27424, SAN DIEGO, CA 92198-1424
PO BOX 27425, SAN DIEGO, CA 92198-1425
PO BOX 27426, SAN DIEGO, CA 92198-1426
PO BOX 27427, SAN DIEGO, CA 92198-1427
PO BOX 27428, SAN DIEGO, CA 92198-1428
PO BOX 27429, SAN DIEGO, CA 92198-1429
PO BOX 27430, SAN DIEGO, CA 92198-1430
PO BOX 27431, SAN DIEGO, CA 92198-1431
PO BOX 27432, SAN DIEGO, CA 92198-1432
PO BOX 27433, SAN DIEGO, CA 92198-1433
PO BOX 27434, SAN DIEGO, CA 92198-1434
PO BOX 27435, SAN DIEGO, CA 92198-1435
PO BOX 27436, SAN DIEGO, CA 92198-1436
PO BOX 27437, SAN DIEGO, CA 92198-1437
PO BOX 27438, SAN DIEGO, CA 92198-1438
PO BOX 27439, SAN DIEGO, CA 92198-1439
PO BOX 27440, SAN DIEGO, CA 92198-1440
PO BOX 27441, SAN DIEGO, CA 92198-1441
PO BOX 27442, SAN DIEGO, CA 92198-1442
PO BOX 27443, SAN DIEGO, CA 92198-1443
PO BOX 27444, SAN DIEGO, CA 92198-1444
PO BOX 27445, SAN DIEGO, CA 92198-1445
PO BOX 27446, SAN DIEGO, CA 92198-1446
PO BOX 27447, SAN DIEGO, CA 92198-1447
PO BOX 27448, SAN DIEGO, CA 92198-1448
PO BOX 27449, SAN DIEGO, CA 92198-1449
PO BOX 27450, SAN DIEGO, CA 92198-1450
PO BOX 27451, SAN DIEGO, CA 92198-1451
PO BOX 27452, SAN DIEGO, CA 92198-1452
PO BOX 27453, SAN DIEGO, CA 92198-1453
PO BOX 27454, SAN DIEGO, CA 92198-1454
PO BOX 27455, SAN DIEGO, CA 92198-1455
PO BOX 27456, SAN DIEGO, CA 92198-1456
PO BOX 27457, SAN DIEGO, CA 92198-1457
PO BOX 27458, SAN DIEGO, CA 92198-1458
PO BOX 27459, SAN DIEGO, CA 92198-1459
PO BOX 27460, SAN DIEGO, CA 92198-1460
PO BOX 27461, SAN DIEGO, CA 92198-1461
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