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 451, STAMFORD, CT 06904-0451
PO BOX 452, STAMFORD, CT 06904-0452
PO BOX 453, STAMFORD, CT 06904-0453
PO BOX 454, STAMFORD, CT 06904-0454
PO BOX 455, STAMFORD, CT 06904-0455
PO BOX 456, STAMFORD, CT 06904-0456
PO BOX 457, STAMFORD, CT 06904-0457
PO BOX 458, STAMFORD, CT 06904-0458
PO BOX 459, STAMFORD, CT 06904-0459
PO BOX 460, STAMFORD, CT 06904-0460
PO BOX 461, STAMFORD, CT 06904-0461
PO BOX 462, STAMFORD, CT 06904-0462
PO BOX 463, STAMFORD, CT 06904-0463
PO BOX 464, STAMFORD, CT 06904-0464
PO BOX 465, STAMFORD, CT 06904-0465
PO BOX 466, STAMFORD, CT 06904-0466
PO BOX 467, STAMFORD, CT 06904-0467
PO BOX 468, STAMFORD, CT 06904-0468
PO BOX 469, STAMFORD, CT 06904-0469
PO BOX 470, STAMFORD, CT 06904-0470
PO BOX 471, STAMFORD, CT 06904-0471
PO BOX 472, STAMFORD, CT 06904-0472
PO BOX 473, STAMFORD, CT 06904-0473
PO BOX 474, STAMFORD, CT 06904-0474
PO BOX 475, STAMFORD, CT 06904-0475
PO BOX 476, STAMFORD, CT 06904-0476
PO BOX 477, STAMFORD, CT 06904-0477
PO BOX 478, STAMFORD, CT 06904-0478
PO BOX 479, STAMFORD, CT 06904-0479
PO BOX 480, STAMFORD, CT 06904-0480
PO BOX 481, STAMFORD, CT 06904-0481
PO BOX 482, STAMFORD, CT 06904-0482
PO BOX 483, STAMFORD, CT 06904-0483
PO BOX 484, STAMFORD, CT 06904-0484
PO BOX 485, STAMFORD, CT 06904-0485
PO BOX 486, STAMFORD, CT 06904-0486
PO BOX 487, STAMFORD, CT 06904-0487
PO BOX 488, STAMFORD, CT 06904-0488
PO BOX 489, STAMFORD, CT 06904-0489
PO BOX 490, STAMFORD, CT 06904-0490
PO BOX 491, STAMFORD, CT 06904-0491
PO BOX 492, STAMFORD, CT 06904-0492
PO BOX 493, STAMFORD, CT 06904-0493
PO BOX 494, STAMFORD, CT 06904-0494
PO BOX 495, STAMFORD, CT 06904-0495
PO BOX 496, STAMFORD, CT 06904-0496
PO BOX 497, STAMFORD, CT 06904-0497
PO BOX 498, STAMFORD, CT 06904-0498
PO BOX 499, STAMFORD, CT 06904-0499
PO BOX 500, STAMFORD, CT 06904-0500
PO BOX 501, STAMFORD, CT 06904-0501
PO BOX 502, STAMFORD, CT 06904-0502
PO BOX 503, STAMFORD, CT 06904-0503
PO BOX 504, STAMFORD, CT 06904-0504
PO BOX 505, STAMFORD, CT 06904-0505
PO BOX 506, STAMFORD, CT 06904-0506
PO BOX 507, STAMFORD, CT 06904-0507
PO BOX 508, STAMFORD, CT 06904-0508
PO BOX 509, STAMFORD, CT 06904-0509
PO BOX 510, STAMFORD, CT 06904-0510
PO BOX 511, STAMFORD, CT 06904-0511
PO BOX 512, STAMFORD, CT 06904-0512
PO BOX 513, STAMFORD, CT 06904-0513
PO BOX 514, STAMFORD, CT 06904-0514
PO BOX 515, STAMFORD, CT 06904-0515
PO BOX 516, STAMFORD, CT 06904-0516
PO BOX 517, STAMFORD, CT 06904-0517
PO BOX 518, STAMFORD, CT 06904-0518
PO BOX 519, STAMFORD, CT 06904-0519
PO BOX 520, STAMFORD, CT 06904-0520
PO BOX 521, STAMFORD, CT 06904-0521
PO BOX 522, STAMFORD, CT 06904-0522
PO BOX 523, STAMFORD, CT 06904-0523
PO BOX 524, STAMFORD, CT 06904-0524
PO BOX 525, STAMFORD, CT 06904-0525
PO BOX 526, STAMFORD, CT 06904-0526
PO BOX 527, STAMFORD, CT 06904-0527
PO BOX 528, STAMFORD, CT 06904-0528
PO BOX 529, STAMFORD, CT 06904-0529
PO BOX 530, STAMFORD, CT 06904-0530
PO BOX 531, STAMFORD, CT 06904-0531
PO BOX 532, STAMFORD, CT 06904-0532
PO BOX 533, STAMFORD, CT 06904-0533
PO BOX 534, STAMFORD, CT 06904-0534
PO BOX 535, STAMFORD, CT 06904-0535
PO BOX 536, STAMFORD, CT 06904-0536
PO BOX 537, STAMFORD, CT 06904-0537
PO BOX 538, STAMFORD, CT 06904-0538
PO BOX 539, STAMFORD, CT 06904-0539
PO BOX 540, STAMFORD, CT 06904-0540
PO BOX 541, STAMFORD, CT 06904-0541
PO BOX 542, STAMFORD, CT 06904-0542
PO BOX 543, STAMFORD, CT 06904-0543
PO BOX 544, STAMFORD, CT 06904-0544
PO BOX 545, STAMFORD, CT 06904-0545
PO BOX 546, STAMFORD, CT 06904-0546
PO BOX 547, STAMFORD, CT 06904-0547
PO BOX 548, STAMFORD, CT 06904-0548
PO BOX 549, STAMFORD, CT 06904-0549
PO BOX 550, STAMFORD, CT 06904-0550
PO BOX 551, STAMFORD, CT 06904-0551
PO BOX 552, STAMFORD, CT 06904-0552
PO BOX 553, STAMFORD, CT 06904-0553
PO BOX 554, STAMFORD, CT 06904-0554
PO BOX 555, STAMFORD, CT 06904-0555
PO BOX 556, STAMFORD, CT 06904-0556
PO BOX 557, STAMFORD, CT 06904-0557
PO BOX 558, STAMFORD, CT 06904-0558
PO BOX 559, STAMFORD, CT 06904-0559
PO BOX 560, STAMFORD, CT 06904-0560
PO BOX 561, STAMFORD, CT 06904-0561
PO BOX 562, STAMFORD, CT 06904-0562
PO BOX 563, STAMFORD, CT 06904-0563
PO BOX 564, STAMFORD, CT 06904-0564
PO BOX 565, STAMFORD, CT 06904-0565
PO BOX 566, STAMFORD, CT 06904-0566
PO BOX 567, STAMFORD, CT 06904-0567
PO BOX 568, STAMFORD, CT 06904-0568
PO BOX 569, STAMFORD, CT 06904-0569
PO BOX 570, STAMFORD, CT 06904-0570
PO BOX 571, STAMFORD, CT 06904-0571
PO BOX 572, STAMFORD, CT 06904-0572
PO BOX 573, STAMFORD, CT 06904-0573
PO BOX 574, STAMFORD, CT 06904-0574
PO BOX 575, STAMFORD, CT 06904-0575
PO BOX 576, STAMFORD, CT 06904-0576
PO BOX 577, STAMFORD, CT 06904-0577
PO BOX 578, STAMFORD, CT 06904-0578
PO BOX 579, STAMFORD, CT 06904-0579
PO BOX 580, STAMFORD, CT 06904-0580
PO BOX 581, STAMFORD, CT 06904-0581
PO BOX 582, STAMFORD, CT 06904-0582
PO BOX 583, STAMFORD, CT 06904-0583
PO BOX 584, STAMFORD, CT 06904-0584
PO BOX 585, STAMFORD, CT 06904-0585
PO BOX 586, STAMFORD, CT 06904-0586
PO BOX 587, STAMFORD, CT 06904-0587
PO BOX 588, STAMFORD, CT 06904-0588
PO BOX 589, STAMFORD, CT 06904-0589
PO BOX 590, STAMFORD, CT 06904-0590
PO BOX 591, STAMFORD, CT 06904-0591
PO BOX 592, STAMFORD, CT 06904-0592
PO BOX 593, STAMFORD, CT 06904-0593
PO BOX 594, STAMFORD, CT 06904-0594
PO BOX 595, STAMFORD, CT 06904-0595
PO BOX 596, STAMFORD, CT 06904-0596
PO BOX 597, STAMFORD, CT 06904-0597
PO BOX 598, STAMFORD, CT 06904-0598
PO BOX 599, STAMFORD, CT 06904-0599
PO BOX 600, STAMFORD, CT 06904-0600
PO BOX 601, STAMFORD, CT 06904-0601
PO BOX 602, STAMFORD, CT 06904-0602
Add new comment