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 1241, WHITE RIVER JUNCTION, VT 05001-1241
PO BOX 1242, WHITE RIVER JUNCTION, VT 05001-1242
PO BOX 1243, WHITE RIVER JUNCTION, VT 05001-1243
PO BOX 1244, WHITE RIVER JUNCTION, VT 05001-1244
PO BOX 1245, WHITE RIVER JUNCTION, VT 05001-1245
PO BOX 1246, WHITE RIVER JUNCTION, VT 05001-1246
PO BOX 1247, WHITE RIVER JUNCTION, VT 05001-1247
PO BOX 1248, WHITE RIVER JUNCTION, VT 05001-1248
PO BOX 1249, WHITE RIVER JUNCTION, VT 05001-1249
PO BOX 1250, WHITE RIVER JUNCTION, VT 05001-1250
PO BOX 1251, WHITE RIVER JUNCTION, VT 05001-1251
PO BOX 1252, WHITE RIVER JUNCTION, VT 05001-1252
PO BOX 1253, WHITE RIVER JUNCTION, VT 05001-1253
PO BOX 1254, WHITE RIVER JUNCTION, VT 05001-1254
PO BOX 1255, WHITE RIVER JUNCTION, VT 05001-1255
PO BOX 1256, WHITE RIVER JUNCTION, VT 05001-1256
PO BOX 1257, WHITE RIVER JUNCTION, VT 05001-1257
PO BOX 1258, WHITE RIVER JUNCTION, VT 05001-1258
PO BOX 1259, WHITE RIVER JUNCTION, VT 05001-1259
PO BOX 1260, WHITE RIVER JUNCTION, VT 05001-1260
PO BOX 1261, WHITE RIVER JUNCTION, VT 05001-1261
PO BOX 1262, WHITE RIVER JUNCTION, VT 05001-1262
PO BOX 1263, WHITE RIVER JUNCTION, VT 05001-1263
PO BOX 1264, WHITE RIVER JUNCTION, VT 05001-1264
PO BOX 1265, WHITE RIVER JUNCTION, VT 05001-1265
PO BOX 1266, WHITE RIVER JUNCTION, VT 05001-1266
PO BOX 1267, WHITE RIVER JUNCTION, VT 05001-1267
PO BOX 1268, WHITE RIVER JUNCTION, VT 05001-1268
PO BOX 1269, WHITE RIVER JUNCTION, VT 05001-1269
PO BOX 1270, WHITE RIVER JUNCTION, VT 05001-1270
PO BOX 1271, WHITE RIVER JUNCTION, VT 05001-1271
PO BOX 1272, WHITE RIVER JUNCTION, VT 05001-1272
PO BOX 1273, WHITE RIVER JUNCTION, VT 05001-1273
PO BOX 1274, WHITE RIVER JUNCTION, VT 05001-1274
PO BOX 1275, WHITE RIVER JUNCTION, VT 05001-1275
PO BOX 1276, WHITE RIVER JUNCTION, VT 05001-1276
PO BOX 1277, WHITE RIVER JUNCTION, VT 05001-1277
PO BOX 1278, WHITE RIVER JUNCTION, VT 05001-1278
PO BOX 1279, WHITE RIVER JUNCTION, VT 05001-1279
PO BOX 1280, WHITE RIVER JUNCTION, VT 05001-1280
PO BOX 1281, WHITE RIVER JUNCTION, VT 05001-1281
PO BOX 1282, WHITE RIVER JUNCTION, VT 05001-1282
PO BOX 1283, WHITE RIVER JUNCTION, VT 05001-1283
PO BOX 1284, WHITE RIVER JUNCTION, VT 05001-1284
PO BOX 1285, WHITE RIVER JUNCTION, VT 05001-1285
PO BOX 1286, WHITE RIVER JUNCTION, VT 05001-1286
PO BOX 1287, WHITE RIVER JUNCTION, VT 05001-1287
PO BOX 1288, WHITE RIVER JUNCTION, VT 05001-1288
PO BOX 1289, WHITE RIVER JUNCTION, VT 05001-1289
PO BOX 1290, WHITE RIVER JUNCTION, VT 05001-1290
PO BOX 1291, WHITE RIVER JUNCTION, VT 05001-1291
PO BOX 1292, WHITE RIVER JUNCTION, VT 05001-1292
PO BOX 1293, WHITE RIVER JUNCTION, VT 05001-1293
PO BOX 1294, WHITE RIVER JUNCTION, VT 05001-1294
PO BOX 1295, WHITE RIVER JUNCTION, VT 05001-1295
PO BOX 1296, WHITE RIVER JUNCTION, VT 05001-1296
PO BOX 1297, WHITE RIVER JUNCTION, VT 05001-1297
PO BOX 1298, WHITE RIVER JUNCTION, VT 05001-1298
PO BOX 1299, WHITE RIVER JUNCTION, VT 05001-1299
PO BOX 1300, WHITE RIVER JUNCTION, VT 05001-1300
PO BOX 1301, WHITE RIVER JUNCTION, VT 05001-1301
PO BOX 1302, WHITE RIVER JUNCTION, VT 05001-1302
PO BOX 1303, WHITE RIVER JUNCTION, VT 05001-1303
PO BOX 1304, WHITE RIVER JUNCTION, VT 05001-1304
PO BOX 1305, WHITE RIVER JUNCTION, VT 05001-1305
PO BOX 1306, WHITE RIVER JUNCTION, VT 05001-1306
PO BOX 1307, WHITE RIVER JUNCTION, VT 05001-1307
PO BOX 1308, WHITE RIVER JUNCTION, VT 05001-1308
PO BOX 1309, WHITE RIVER JUNCTION, VT 05001-1309
PO BOX 1310, WHITE RIVER JUNCTION, VT 05001-1310
PO BOX 1311, WHITE RIVER JUNCTION, VT 05001-1311
PO BOX 1312, WHITE RIVER JUNCTION, VT 05001-1312
PO BOX 1313, WHITE RIVER JUNCTION, VT 05001-1313
PO BOX 1314, WHITE RIVER JUNCTION, VT 05001-1314
PO BOX 1315, WHITE RIVER JUNCTION, VT 05001-1315
PO BOX 1316, WHITE RIVER JUNCTION, VT 05001-1316
PO BOX 1317, WHITE RIVER JUNCTION, VT 05001-1317
PO BOX 1318, WHITE RIVER JUNCTION, VT 05001-1318
PO BOX 1319, WHITE RIVER JUNCTION, VT 05001-1319
PO BOX 1320, WHITE RIVER JUNCTION, VT 05001-1320
PO BOX 1321, WHITE RIVER JUNCTION, VT 05001-1321
PO BOX 1322, WHITE RIVER JUNCTION, VT 05001-1322
PO BOX 1323, WHITE RIVER JUNCTION, VT 05001-1323
PO BOX 1324, WHITE RIVER JUNCTION, VT 05001-1324
PO BOX 1325, WHITE RIVER JUNCTION, VT 05001-1325
PO BOX 1326, WHITE RIVER JUNCTION, VT 05001-1326
PO BOX 1327, WHITE RIVER JUNCTION, VT 05001-1327
PO BOX 1328, WHITE RIVER JUNCTION, VT 05001-1328
PO BOX 1329, WHITE RIVER JUNCTION, VT 05001-1329
PO BOX 1330, WHITE RIVER JUNCTION, VT 05001-1330
PO BOX 1331, WHITE RIVER JUNCTION, VT 05001-1331
PO BOX 1332, WHITE RIVER JUNCTION, VT 05001-1332
PO BOX 1333, WHITE RIVER JUNCTION, VT 05001-1333
PO BOX 1334, WHITE RIVER JUNCTION, VT 05001-1334
PO BOX 1335, WHITE RIVER JUNCTION, VT 05001-1335
PO BOX 1336, WHITE RIVER JUNCTION, VT 05001-1336
PO BOX 1337, WHITE RIVER JUNCTION, VT 05001-1337
PO BOX 1338, WHITE RIVER JUNCTION, VT 05001-1338
PO BOX 1339, WHITE RIVER JUNCTION, VT 05001-1339
PO BOX 1340, WHITE RIVER JUNCTION, VT 05001-1340
PO BOX 1341, WHITE RIVER JUNCTION, VT 05001-1341
PO BOX 1342, WHITE RIVER JUNCTION, VT 05001-1342
PO BOX 1343, WHITE RIVER JUNCTION, VT 05001-1343
PO BOX 1344, WHITE RIVER JUNCTION, VT 05001-1344
PO BOX 1345, WHITE RIVER JUNCTION, VT 05001-1345
PO BOX 1346, WHITE RIVER JUNCTION, VT 05001-1346
PO BOX 1347, WHITE RIVER JUNCTION, VT 05001-1347
PO BOX 1348, WHITE RIVER JUNCTION, VT 05001-1348
PO BOX 1349, WHITE RIVER JUNCTION, VT 05001-1349
PO BOX 1350, WHITE RIVER JUNCTION, VT 05001-1350
PO BOX 1351, WHITE RIVER JUNCTION, VT 05001-1351
PO BOX 1352, WHITE RIVER JUNCTION, VT 05001-1352
PO BOX 1353, WHITE RIVER JUNCTION, VT 05001-1353
PO BOX 1354, WHITE RIVER JUNCTION, VT 05001-1354
PO BOX 1355, WHITE RIVER JUNCTION, VT 05001-1355
PO BOX 1356, WHITE RIVER JUNCTION, VT 05001-1356
PO BOX 1357, WHITE RIVER JUNCTION, VT 05001-1357
PO BOX 1358, WHITE RIVER JUNCTION, VT 05001-1358
PO BOX 1359, WHITE RIVER JUNCTION, VT 05001-1359
PO BOX 1360, WHITE RIVER JUNCTION, VT 05001-1360
PO BOX 1361, WHITE RIVER JUNCTION, VT 05001-1361
PO BOX 1362, WHITE RIVER JUNCTION, VT 05001-1362
PO BOX 1363, WHITE RIVER JUNCTION, VT 05001-1363
PO BOX 1364, WHITE RIVER JUNCTION, VT 05001-1364
PO BOX 1365, WHITE RIVER JUNCTION, VT 05001-1365
PO BOX 1366, WHITE RIVER JUNCTION, VT 05001-1366
PO BOX 1367, WHITE RIVER JUNCTION, VT 05001-1367
PO BOX 1368, WHITE RIVER JUNCTION, VT 05001-1368
PO BOX 1369, WHITE RIVER JUNCTION, VT 05001-1369
PO BOX 1370, WHITE RIVER JUNCTION, VT 05001-1370
PO BOX 1371, WHITE RIVER JUNCTION, VT 05001-1371
PO BOX 1372, WHITE RIVER JUNCTION, VT 05001-1372
PO BOX 1373, WHITE RIVER JUNCTION, VT 05001-1373
PO BOX 1374, WHITE RIVER JUNCTION, VT 05001-1374
PO BOX 1375, WHITE RIVER JUNCTION, VT 05001-1375
PO BOX 1376, WHITE RIVER JUNCTION, VT 05001-1376
PO BOX 1377, WHITE RIVER JUNCTION, VT 05001-1377
PO BOX 1378, WHITE RIVER JUNCTION, VT 05001-1378
PO BOX 1379, WHITE RIVER JUNCTION, VT 05001-1379
PO BOX 1380, WHITE RIVER JUNCTION, VT 05001-1380
PO BOX 1381, WHITE RIVER JUNCTION, VT 05001-1381
PO BOX 1382, WHITE RIVER JUNCTION, VT 05001-1382
PO BOX 1383, WHITE RIVER JUNCTION, VT 05001-1383
PO BOX 1384, WHITE RIVER JUNCTION, VT 05001-1384
PO BOX 1385, WHITE RIVER JUNCTION, VT 05001-1385
PO BOX 1386, WHITE RIVER JUNCTION, VT 05001-1386
PO BOX 1387, WHITE RIVER JUNCTION, VT 05001-1387
PO BOX 1388, WHITE RIVER JUNCTION, VT 05001-1388
PO BOX 1389, WHITE RIVER JUNCTION, VT 05001-1389
PO BOX 1390, WHITE RIVER JUNCTION, VT 05001-1390
PO BOX 1391, WHITE RIVER JUNCTION, VT 05001-1391
PO BOX 1392, WHITE RIVER JUNCTION, VT 05001-1392
PO BOX 1393, WHITE RIVER JUNCTION, VT 05001-1393
PO BOX 1394, WHITE RIVER JUNCTION, VT 05001-1394
PO BOX 1395, WHITE RIVER JUNCTION, VT 05001-1395
PO BOX 1396, WHITE RIVER JUNCTION, VT 05001-1396
PO BOX 1397, WHITE RIVER JUNCTION, VT 05001-1397
PO BOX 1398, WHITE RIVER JUNCTION, VT 05001-1398
PO BOX 1399, WHITE RIVER JUNCTION, VT 05001-1399
PO BOX 1400, WHITE RIVER JUNCTION, VT 05001-1400
PO BOX 1401, WHITE RIVER JUNCTION, VT 05001-1401
PO BOX 1402, WHITE RIVER JUNCTION, VT 05001-1402
PO BOX 1403, WHITE RIVER JUNCTION, VT 05001-1403
PO BOX 1404, WHITE RIVER JUNCTION, VT 05001-1404
PO BOX 1405, WHITE RIVER JUNCTION, VT 05001-1405
PO BOX 1406, WHITE RIVER JUNCTION, VT 05001-1406
PO BOX 1407, WHITE RIVER JUNCTION, VT 05001-1407
PO BOX 1408, WHITE RIVER JUNCTION, VT 05001-1408
PO BOX 1409, WHITE RIVER JUNCTION, VT 05001-1409
PO BOX 1410, WHITE RIVER JUNCTION, VT 05001-1410
PO BOX 1411, WHITE RIVER JUNCTION, VT 05001-1411
PO BOX 1412, WHITE RIVER JUNCTION, VT 05001-1412
PO BOX 1413, WHITE RIVER JUNCTION, VT 05001-1413
PO BOX 1414, WHITE RIVER JUNCTION, VT 05001-1414
PO BOX 1415, WHITE RIVER JUNCTION, VT 05001-1415
PO BOX 1416, WHITE RIVER JUNCTION, VT 05001-1416
PO BOX 1417, WHITE RIVER JUNCTION, VT 05001-1417
PO BOX 1418, WHITE RIVER JUNCTION, VT 05001-1418
PO BOX 1419, WHITE RIVER JUNCTION, VT 05001-1419
PO BOX 1420, WHITE RIVER JUNCTION, VT 05001-1420
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