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 1273, PALM SPRINGS, CA 92263-1273
PO BOX 1274, PALM SPRINGS, CA 92263-1274
PO BOX 1275, PALM SPRINGS, CA 92263-1275
PO BOX 1276, PALM SPRINGS, CA 92263-1276
PO BOX 1277, PALM SPRINGS, CA 92263-1277
PO BOX 1278, PALM SPRINGS, CA 92263-1278
PO BOX 1279, PALM SPRINGS, CA 92263-1279
PO BOX 1280, PALM SPRINGS, CA 92263-1280
PO BOX 1281, PALM SPRINGS, CA 92263-1281
PO BOX 1282, PALM SPRINGS, CA 92263-1282
PO BOX 1283, PALM SPRINGS, CA 92263-1283
PO BOX 1284, PALM SPRINGS, CA 92263-1284
PO BOX 1285, PALM SPRINGS, CA 92263-1285
PO BOX 1286, PALM SPRINGS, CA 92263-1286
PO BOX 1287, PALM SPRINGS, CA 92263-1287
PO BOX 1288, PALM SPRINGS, CA 92263-1288
PO BOX 1289, PALM SPRINGS, CA 92263-1289
PO BOX 1290, PALM SPRINGS, CA 92263-1290
PO BOX 1291, PALM SPRINGS, CA 92263-1291
PO BOX 1292, PALM SPRINGS, CA 92263-1292
PO BOX 1293, PALM SPRINGS, CA 92263-1293
PO BOX 1294, PALM SPRINGS, CA 92263-1294
PO BOX 1295, PALM SPRINGS, CA 92263-1295
PO BOX 1296, PALM SPRINGS, CA 92263-1296
PO BOX 1297, PALM SPRINGS, CA 92263-1297
PO BOX 1298, PALM SPRINGS, CA 92263-1298
PO BOX 1299, PALM SPRINGS, CA 92263-1299
PO BOX 1300, PALM SPRINGS, CA 92263-1300
PO BOX 1301, PALM SPRINGS, CA 92263-1301
PO BOX 1302, PALM SPRINGS, CA 92263-1302
PO BOX 1303, PALM SPRINGS, CA 92263-1303
PO BOX 1304, PALM SPRINGS, CA 92263-1304
PO BOX 1305, PALM SPRINGS, CA 92263-1305
PO BOX 1306, PALM SPRINGS, CA 92263-1306
PO BOX 1307, PALM SPRINGS, CA 92263-1307
PO BOX 1308, PALM SPRINGS, CA 92263-1308
PO BOX 1309, PALM SPRINGS, CA 92263-1309
PO BOX 1310, PALM SPRINGS, CA 92263-1310
PO BOX 1311, PALM SPRINGS, CA 92263-1311
PO BOX 1312, PALM SPRINGS, CA 92263-1312
PO BOX 1313, PALM SPRINGS, CA 92263-1313
PO BOX 1314, PALM SPRINGS, CA 92263-1314
PO BOX 1315, PALM SPRINGS, CA 92263-1315
PO BOX 1316, PALM SPRINGS, CA 92263-1316
PO BOX 1317, PALM SPRINGS, CA 92263-1317
PO BOX 1318, PALM SPRINGS, CA 92263-1318
PO BOX 1319, PALM SPRINGS, CA 92263-1319
PO BOX 1320, PALM SPRINGS, CA 92263-1320
PO BOX 1321, PALM SPRINGS, CA 92263-1321
PO BOX 1322, PALM SPRINGS, CA 92263-1322
PO BOX 1323, PALM SPRINGS, CA 92263-1323
PO BOX 1324, PALM SPRINGS, CA 92263-1324
PO BOX 1325, PALM SPRINGS, CA 92263-1325
PO BOX 1326, PALM SPRINGS, CA 92263-1326
PO BOX 1327, PALM SPRINGS, CA 92263-1327
PO BOX 1328, PALM SPRINGS, CA 92263-1328
PO BOX 1329, PALM SPRINGS, CA 92263-1329
PO BOX 1330, PALM SPRINGS, CA 92263-1330
PO BOX 1331, PALM SPRINGS, CA 92263-1331
PO BOX 1332, PALM SPRINGS, CA 92263-1332
PO BOX 1333, PALM SPRINGS, CA 92263-1333
PO BOX 1334, PALM SPRINGS, CA 92263-1334
PO BOX 1335, PALM SPRINGS, CA 92263-1335
PO BOX 1336, PALM SPRINGS, CA 92263-1336
PO BOX 1337, PALM SPRINGS, CA 92263-1337
PO BOX 1338, PALM SPRINGS, CA 92263-1338
PO BOX 1339, PALM SPRINGS, CA 92263-1339
PO BOX 1340, PALM SPRINGS, CA 92263-1340
PO BOX 1341, PALM SPRINGS, CA 92263-1341
PO BOX 1342, PALM SPRINGS, CA 92263-1342
PO BOX 1343, PALM SPRINGS, CA 92263-1343
PO BOX 1344, PALM SPRINGS, CA 92263-1344
PO BOX 1345, PALM SPRINGS, CA 92263-1345
PO BOX 1346, PALM SPRINGS, CA 92263-1346
PO BOX 1347, PALM SPRINGS, CA 92263-1347
PO BOX 1348, PALM SPRINGS, CA 92263-1348
PO BOX 1349, PALM SPRINGS, CA 92263-1349
PO BOX 1350, PALM SPRINGS, CA 92263-1350
PO BOX 1351, PALM SPRINGS, CA 92263-1351
PO BOX 1352, PALM SPRINGS, CA 92263-1352
PO BOX 1353, PALM SPRINGS, CA 92263-1353
PO BOX 1354, PALM SPRINGS, CA 92263-1354
PO BOX 1355, PALM SPRINGS, CA 92263-1355
PO BOX 1356, PALM SPRINGS, CA 92263-1356
PO BOX 1357, PALM SPRINGS, CA 92263-1357
PO BOX 1358, PALM SPRINGS, CA 92263-1358
PO BOX 1359, PALM SPRINGS, CA 92263-1359
PO BOX 1360, PALM SPRINGS, CA 92263-1360
PO BOX 1361, PALM SPRINGS, CA 92263-1361
PO BOX 1362, PALM SPRINGS, CA 92263-1362
PO BOX 1363, PALM SPRINGS, CA 92263-1363
PO BOX 1364, PALM SPRINGS, CA 92263-1364
PO BOX 1365, PALM SPRINGS, CA 92263-1365
PO BOX 1366, PALM SPRINGS, CA 92263-1366
PO BOX 1367, PALM SPRINGS, CA 92263-1367
PO BOX 1368, PALM SPRINGS, CA 92263-1368
PO BOX 1369, PALM SPRINGS, CA 92263-1369
PO BOX 1370, PALM SPRINGS, CA 92263-1370
PO BOX 1371, PALM SPRINGS, CA 92263-1371
PO BOX 1372, PALM SPRINGS, CA 92263-1372
PO BOX 1373, PALM SPRINGS, CA 92263-1373
PO BOX 1374, PALM SPRINGS, CA 92263-1374
PO BOX 1375, PALM SPRINGS, CA 92263-1375
PO BOX 1376, PALM SPRINGS, CA 92263-1376
PO BOX 1377, PALM SPRINGS, CA 92263-1377
PO BOX 1378, PALM SPRINGS, CA 92263-1378
PO BOX 1379, PALM SPRINGS, CA 92263-1379
PO BOX 1380, PALM SPRINGS, CA 92263-1380
PO BOX 1381, PALM SPRINGS, CA 92263-1381
PO BOX 1382, PALM SPRINGS, CA 92263-1382
PO BOX 1383, PALM SPRINGS, CA 92263-1383
PO BOX 1384, PALM SPRINGS, CA 92263-1384
PO BOX 1385, PALM SPRINGS, CA 92263-1385
PO BOX 1386, PALM SPRINGS, CA 92263-1386
PO BOX 1387, PALM SPRINGS, CA 92263-1387
PO BOX 1388, PALM SPRINGS, CA 92263-1388
PO BOX 1389, PALM SPRINGS, CA 92263-1389
PO BOX 1390, PALM SPRINGS, CA 92263-1390
PO BOX 1391, PALM SPRINGS, CA 92263-1391
PO BOX 1392, PALM SPRINGS, CA 92263-1392
PO BOX 1393, PALM SPRINGS, CA 92263-1393
PO BOX 1394, PALM SPRINGS, CA 92263-1394
PO BOX 1395, PALM SPRINGS, CA 92263-1395
PO BOX 1396, PALM SPRINGS, CA 92263-1396
PO BOX 1397, PALM SPRINGS, CA 92263-1397
PO BOX 1398, PALM SPRINGS, CA 92263-1398
PO BOX 1399, PALM SPRINGS, CA 92263-1399
PO BOX 1400, PALM SPRINGS, CA 92263-1400
PO BOX 1401, PALM SPRINGS, CA 92263-1401
PO BOX 1402, PALM SPRINGS, CA 92263-1402
PO BOX 1403, PALM SPRINGS, CA 92263-1403
PO BOX 1404, PALM SPRINGS, CA 92263-1404
PO BOX 1405, PALM SPRINGS, CA 92263-1405
PO BOX 1406, PALM SPRINGS, CA 92263-1406
PO BOX 1407, PALM SPRINGS, CA 92263-1407
PO BOX 1408, PALM SPRINGS, CA 92263-1408
PO BOX 1409, PALM SPRINGS, CA 92263-1409
PO BOX 1410, PALM SPRINGS, CA 92263-1410
PO BOX 1411, PALM SPRINGS, CA 92263-1411
PO BOX 1412, PALM SPRINGS, CA 92263-1412
PO BOX 1413, PALM SPRINGS, CA 92263-1413
PO BOX 1414, PALM SPRINGS, CA 92263-1414
PO BOX 1415, PALM SPRINGS, CA 92263-1415
PO BOX 1416, PALM SPRINGS, CA 92263-1416
PO BOX 1417, PALM SPRINGS, CA 92263-1417
PO BOX 1418, PALM SPRINGS, CA 92263-1418
PO BOX 1419, PALM SPRINGS, CA 92263-1419
PO BOX 1420, PALM SPRINGS, CA 92263-1420
PO BOX 1421, PALM SPRINGS, CA 92263-1421
PO BOX 1422, PALM SPRINGS, CA 92263-1422
PO BOX 1423, PALM SPRINGS, CA 92263-1423
PO BOX 1424, PALM SPRINGS, CA 92263-1424
PO BOX 1425, PALM SPRINGS, CA 92263-1425
PO BOX 1426, PALM SPRINGS, CA 92263-1426
PO BOX 1427, PALM SPRINGS, CA 92263-1427
PO BOX 1428, PALM SPRINGS, CA 92263-1428
PO BOX 1429, PALM SPRINGS, CA 92263-1429
PO BOX 1430, PALM SPRINGS, CA 92263-1430
PO BOX 1431, PALM SPRINGS, CA 92263-1431
PO BOX 1432, PALM SPRINGS, CA 92263-1432
PO BOX 1433, PALM SPRINGS, CA 92263-1433
PO BOX 1434, PALM SPRINGS, CA 92263-1434
PO BOX 1435, PALM SPRINGS, CA 92263-1435
PO BOX 1436, PALM SPRINGS, CA 92263-1436
PO BOX 1437, PALM SPRINGS, CA 92263-1437
PO BOX 1438, PALM SPRINGS, CA 92263-1438