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 1361, PALMER LAKE, CO 80133-1361
PO BOX 1362, PALMER LAKE, CO 80133-1362
PO BOX 1363, PALMER LAKE, CO 80133-1363
PO BOX 1364, PALMER LAKE, CO 80133-1364
PO BOX 1365, PALMER LAKE, CO 80133-1365
PO BOX 1366, PALMER LAKE, CO 80133-1366
PO BOX 1367, PALMER LAKE, CO 80133-1367
PO BOX 1368, PALMER LAKE, CO 80133-1368
PO BOX 1369, PALMER LAKE, CO 80133-1369
PO BOX 1370, PALMER LAKE, CO 80133-1370
PO BOX 1371, PALMER LAKE, CO 80133-1371
PO BOX 1372, PALMER LAKE, CO 80133-1372
PO BOX 1373, PALMER LAKE, CO 80133-1373
PO BOX 1374, PALMER LAKE, CO 80133-1374
PO BOX 1375, PALMER LAKE, CO 80133-1375
PO BOX 1376, PALMER LAKE, CO 80133-1376
PO BOX 1377, PALMER LAKE, CO 80133-1377
PO BOX 1378, PALMER LAKE, CO 80133-1378
PO BOX 1379, PALMER LAKE, CO 80133-1379
PO BOX 1380, PALMER LAKE, CO 80133-1380
PO BOX 1381, PALMER LAKE, CO 80133-1381
PO BOX 1382, PALMER LAKE, CO 80133-1382
PO BOX 1383, PALMER LAKE, CO 80133-1383
PO BOX 1384, PALMER LAKE, CO 80133-1384
PO BOX 1385, PALMER LAKE, CO 80133-1385
PO BOX 1386, PALMER LAKE, CO 80133-1386
PO BOX 1387, PALMER LAKE, CO 80133-1387
PO BOX 1388, PALMER LAKE, CO 80133-1388
PO BOX 1389, PALMER LAKE, CO 80133-1389
PO BOX 1390, PALMER LAKE, CO 80133-1390
PO BOX 1391, PALMER LAKE, CO 80133-1391
PO BOX 1392, PALMER LAKE, CO 80133-1392
PO BOX 1393, PALMER LAKE, CO 80133-1393
PO BOX 1394, PALMER LAKE, CO 80133-1394
PO BOX 1395, PALMER LAKE, CO 80133-1395
PO BOX 1396, PALMER LAKE, CO 80133-1396
PO BOX 1397, PALMER LAKE, CO 80133-1397
PO BOX 1398, PALMER LAKE, CO 80133-1398
PO BOX 1399, PALMER LAKE, CO 80133-1399
PO BOX 1400, PALMER LAKE, CO 80133-1400
PO BOX 1401, PALMER LAKE, CO 80133-1401
PO BOX 1402, PALMER LAKE, CO 80133-1402
PO BOX 1403, PALMER LAKE, CO 80133-1403
PO BOX 1404, PALMER LAKE, CO 80133-1404
PO BOX 1405, PALMER LAKE, CO 80133-1405
PO BOX 1406, PALMER LAKE, CO 80133-1406
PO BOX 1407, PALMER LAKE, CO 80133-1407
PO BOX 1408, PALMER LAKE, CO 80133-1408
PO BOX 1409, PALMER LAKE, CO 80133-1409
PO BOX 1410, PALMER LAKE, CO 80133-1410
PO BOX 1411, PALMER LAKE, CO 80133-1411
PO BOX 1412, PALMER LAKE, CO 80133-1412
PO BOX 1413, PALMER LAKE, CO 80133-1413
PO BOX 1414, PALMER LAKE, CO 80133-1414
PO BOX 1415, PALMER LAKE, CO 80133-1415
PO BOX 1416, PALMER LAKE, CO 80133-1416
PO BOX 1417, PALMER LAKE, CO 80133-1417
PO BOX 1418, PALMER LAKE, CO 80133-1418
PO BOX 1419, PALMER LAKE, CO 80133-1419
PO BOX 1420, PALMER LAKE, CO 80133-1420
PO BOX 1421, PALMER LAKE, CO 80133-1421
PO BOX 1422, PALMER LAKE, CO 80133-1422
PO BOX 1423, PALMER LAKE, CO 80133-1423
PO BOX 1424, PALMER LAKE, CO 80133-1424
PO BOX 1425, PALMER LAKE, CO 80133-1425
PO BOX 1426, PALMER LAKE, CO 80133-1426
PO BOX 1427, PALMER LAKE, CO 80133-1427
PO BOX 1428, PALMER LAKE, CO 80133-1428
PO BOX 1429, PALMER LAKE, CO 80133-1429
PO BOX 1430, PALMER LAKE, CO 80133-1430
PO BOX 1431, PALMER LAKE, CO 80133-1431
PO BOX 1432, PALMER LAKE, CO 80133-1432
PO BOX 1433, PALMER LAKE, CO 80133-1433
PO BOX 1434, PALMER LAKE, CO 80133-1434
PO BOX 1435, PALMER LAKE, CO 80133-1435
PO BOX 1436, PALMER LAKE, CO 80133-1436
PO BOX 1437, PALMER LAKE, CO 80133-1437
PO BOX 1438, PALMER LAKE, CO 80133-1438
PO BOX 1439, PALMER LAKE, CO 80133-1439
PO BOX 1440, PALMER LAKE, CO 80133-1440
PO BOX 1441, PALMER LAKE, CO 80133-1441
PO BOX 1442, PALMER LAKE, CO 80133-1442
PO BOX 1443, PALMER LAKE, CO 80133-1443
PO BOX 1444, PALMER LAKE, CO 80133-1444
PO BOX 1445, PALMER LAKE, CO 80133-1445
PO BOX 1446, PALMER LAKE, CO 80133-1446
PO BOX 1447, PALMER LAKE, CO 80133-1447
PO BOX 1448, PALMER LAKE, CO 80133-1448
PO BOX 1449, PALMER LAKE, CO 80133-1449
PO BOX 1450, PALMER LAKE, CO 80133-1450
PO BOX 1451, PALMER LAKE, CO 80133-1451
PO BOX 1452, PALMER LAKE, CO 80133-1452
PO BOX 1453, PALMER LAKE, CO 80133-1453
PO BOX 1454, PALMER LAKE, CO 80133-1454
PO BOX 1455, PALMER LAKE, CO 80133-1455
PO BOX 1456, PALMER LAKE, CO 80133-1456
PO BOX 1457, PALMER LAKE, CO 80133-1457
PO BOX 1458, PALMER LAKE, CO 80133-1458
PO BOX 1459, PALMER LAKE, CO 80133-1459
PO BOX 1460, PALMER LAKE, CO 80133-1460
PO BOX 1461, PALMER LAKE, CO 80133-1461
PO BOX 1462, PALMER LAKE, CO 80133-1462
PO BOX 1463, PALMER LAKE, CO 80133-1463
PO BOX 1464, PALMER LAKE, CO 80133-1464
PO BOX 1465, PALMER LAKE, CO 80133-1465
PO BOX 1466, PALMER LAKE, CO 80133-1466
PO BOX 1467, PALMER LAKE, CO 80133-1467
PO BOX 1468, PALMER LAKE, CO 80133-1468
PO BOX 1469, PALMER LAKE, CO 80133-1469
PO BOX 1470, PALMER LAKE, CO 80133-1470
PO BOX 1471, PALMER LAKE, CO 80133-1471
PO BOX 1472, PALMER LAKE, CO 80133-1472
PO BOX 1473, PALMER LAKE, CO 80133-1473
PO BOX 1474, PALMER LAKE, CO 80133-1474
PO BOX 1475, PALMER LAKE, CO 80133-1475
PO BOX 1476, PALMER LAKE, CO 80133-1476
PO BOX 1477, PALMER LAKE, CO 80133-1477
PO BOX 1478, PALMER LAKE, CO 80133-1478
PO BOX 1479, PALMER LAKE, CO 80133-1479
PO BOX 1480, PALMER LAKE, CO 80133-1480
PO BOX 1481, PALMER LAKE, CO 80133-1481
PO BOX 1482, PALMER LAKE, CO 80133-1482
PO BOX 1483, PALMER LAKE, CO 80133-1483
PO BOX 1484, PALMER LAKE, CO 80133-1484
PO BOX 1485, PALMER LAKE, CO 80133-1485
PO BOX 1486, PALMER LAKE, CO 80133-1486
PO BOX 1487, PALMER LAKE, CO 80133-1487
PO BOX 1488, PALMER LAKE, CO 80133-1488
PO BOX 1489, PALMER LAKE, CO 80133-1489
PO BOX 1490, PALMER LAKE, CO 80133-1490
PO BOX 1491, PALMER LAKE, CO 80133-1491
PO BOX 1492, PALMER LAKE, CO 80133-1492
PO BOX 1493, PALMER LAKE, CO 80133-1493
PO BOX 1494, PALMER LAKE, CO 80133-1494
PO BOX 1495, PALMER LAKE, CO 80133-1495
PO BOX 1496, PALMER LAKE, CO 80133-1496
PO BOX 1497, PALMER LAKE, CO 80133-1497
PO BOX 1498, PALMER LAKE, CO 80133-1498
PO BOX 1499, PALMER LAKE, CO 80133-1499
PO BOX 1500, PALMER LAKE, CO 80133-1500
PO BOX 1501, PALMER LAKE, CO 80133-1501
PO BOX 1502, PALMER LAKE, CO 80133-1502
PO BOX 1503, PALMER LAKE, CO 80133-1503
PO BOX 1504, PALMER LAKE, CO 80133-1504
PO BOX 1505, PALMER LAKE, CO 80133-1505
PO BOX 1506, PALMER LAKE, CO 80133-1506
PO BOX 1507, PALMER LAKE, CO 80133-1507
PO BOX 1508, PALMER LAKE, CO 80133-1508
PO BOX 1509, PALMER LAKE, CO 80133-1509
PO BOX 1510, PALMER LAKE, CO 80133-1510
PO BOX 1511, PALMER LAKE, CO 80133-1511
PO BOX 1512, PALMER LAKE, CO 80133-1512
PO BOX 1513, PALMER LAKE, CO 80133-1513
PO BOX 1514, PALMER LAKE, CO 80133-1514
PO BOX 1515, PALMER LAKE, CO 80133-1515
PO BOX 1516, PALMER LAKE, CO 80133-1516
PO BOX 1517, PALMER LAKE, CO 80133-1517
PO BOX 1518, PALMER LAKE, CO 80133-1518
PO BOX 1519, PALMER LAKE, CO 80133-1519
PO BOX 1520, PALMER LAKE, CO 80133-1520
PO BOX 1521, PALMER LAKE, CO 80133-1521
PO BOX 1522, PALMER LAKE, CO 80133-1522
PO BOX 1523, PALMER LAKE, CO 80133-1523
PO BOX 1524, PALMER LAKE, CO 80133-1524
PO BOX 1525, PALMER LAKE, CO 80133-1525
PO BOX 1526, PALMER LAKE, CO 80133-1526
PO BOX 1527, PALMER LAKE, CO 80133-1527
PO BOX 1528, PALMER LAKE, CO 80133-1528
PO BOX 1529, PALMER LAKE, CO 80133-1529
PO BOX 1530, PALMER LAKE, CO 80133-1530
PO BOX 1531, PALMER LAKE, CO 80133-1531
PO BOX 1532, PALMER LAKE, CO 80133-1532
PO BOX 1533, PALMER LAKE, CO 80133-1533
PO BOX 1534, PALMER LAKE, CO 80133-1534
PO BOX 1535, PALMER LAKE, CO 80133-1535
PO BOX 1536, PALMER LAKE, CO 80133-1536
PO BOX 1537, PALMER LAKE, CO 80133-1537
PO BOX 1538, PALMER LAKE, CO 80133-1538
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