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 261, POMFRET CENTER, CT 06259-0261
PO BOX 262, POMFRET CENTER, CT 06259-0262
PO BOX 263, POMFRET CENTER, CT 06259-0263
PO BOX 264, POMFRET CENTER, CT 06259-0264
PO BOX 265, POMFRET CENTER, CT 06259-0265
PO BOX 266, POMFRET CENTER, CT 06259-0266
PO BOX 267, POMFRET CENTER, CT 06259-0267
PO BOX 268, POMFRET CENTER, CT 06259-0268
PO BOX 269, POMFRET CENTER, CT 06259-0269
PO BOX 270, POMFRET CENTER, CT 06259-0270
PO BOX 271, POMFRET CENTER, CT 06259-0271
PO BOX 272, POMFRET CENTER, CT 06259-0272
PO BOX 273, POMFRET CENTER, CT 06259-0273
PO BOX 274, POMFRET CENTER, CT 06259-0274
PO BOX 275, POMFRET CENTER, CT 06259-0275
PO BOX 276, POMFRET CENTER, CT 06259-0276
PO BOX 277, POMFRET CENTER, CT 06259-0277
PO BOX 278, POMFRET CENTER, CT 06259-0278
PO BOX 279, POMFRET CENTER, CT 06259-0279
PO BOX 280, POMFRET CENTER, CT 06259-0280
PO BOX 281, POMFRET CENTER, CT 06259-0281
PO BOX 282, POMFRET CENTER, CT 06259-0282
PO BOX 283, POMFRET CENTER, CT 06259-0283
PO BOX 284, POMFRET CENTER, CT 06259-0284
PO BOX 285, POMFRET CENTER, CT 06259-0285
PO BOX 286, POMFRET CENTER, CT 06259-0286
PO BOX 287, POMFRET CENTER, CT 06259-0287
PO BOX 288, POMFRET CENTER, CT 06259-0288
PO BOX 289, POMFRET CENTER, CT 06259-0289
PO BOX 290, POMFRET CENTER, CT 06259-0290
PO BOX 291, POMFRET CENTER, CT 06259-0291
PO BOX 292, POMFRET CENTER, CT 06259-0292
PO BOX 293, POMFRET CENTER, CT 06259-0293
PO BOX 294, POMFRET CENTER, CT 06259-0294
PO BOX 295, POMFRET CENTER, CT 06259-0295
PO BOX 296, POMFRET CENTER, CT 06259-0296
PO BOX 297, POMFRET CENTER, CT 06259-0297
PO BOX 298, POMFRET CENTER, CT 06259-0298
PO BOX 299, POMFRET CENTER, CT 06259-0299
PO BOX 300, POMFRET CENTER, CT 06259-0300
PO BOX 301, POMFRET CENTER, CT 06259-0301
PO BOX 302, POMFRET CENTER, CT 06259-0302
PO BOX 303, POMFRET CENTER, CT 06259-0303
PO BOX 304, POMFRET CENTER, CT 06259-0304
PO BOX 305, POMFRET CENTER, CT 06259-0305
PO BOX 306, POMFRET CENTER, CT 06259-0306
PO BOX 307, POMFRET CENTER, CT 06259-0307
PO BOX 308, POMFRET CENTER, CT 06259-0308
PO BOX 309, POMFRET CENTER, CT 06259-0309
PO BOX 310, POMFRET CENTER, CT 06259-0310
PO BOX 311, POMFRET CENTER, CT 06259-0311
PO BOX 312, POMFRET CENTER, CT 06259-0312
PO BOX 313, POMFRET CENTER, CT 06259-0313
PO BOX 314, POMFRET CENTER, CT 06259-0314
PO BOX 315, POMFRET CENTER, CT 06259-0315
PO BOX 316, POMFRET CENTER, CT 06259-0316
PO BOX 317, POMFRET CENTER, CT 06259-0317
PO BOX 318, POMFRET CENTER, CT 06259-0318
PO BOX 319, POMFRET CENTER, CT 06259-0319
PO BOX 320, POMFRET CENTER, CT 06259-0320
PO BOX 321, POMFRET CENTER, CT 06259-0321
PO BOX 322, POMFRET CENTER, CT 06259-0322
PO BOX 323, POMFRET CENTER, CT 06259-0323
PO BOX 324, POMFRET CENTER, CT 06259-0324
PO BOX 325, POMFRET CENTER, CT 06259-0325
PO BOX 326, POMFRET CENTER, CT 06259-0326
PO BOX 327, POMFRET CENTER, CT 06259-0327
PO BOX 328, POMFRET CENTER, CT 06259-0328
PO BOX 329, POMFRET CENTER, CT 06259-0329
PO BOX 330, POMFRET CENTER, CT 06259-0330
PO BOX 331, POMFRET CENTER, CT 06259-0331
PO BOX 332, POMFRET CENTER, CT 06259-0332
PO BOX 333, POMFRET CENTER, CT 06259-0333
PO BOX 334, POMFRET CENTER, CT 06259-0334
PO BOX 335, POMFRET CENTER, CT 06259-0335
PO BOX 336, POMFRET CENTER, CT 06259-0336
PO BOX 337, POMFRET CENTER, CT 06259-0337
PO BOX 338, POMFRET CENTER, CT 06259-0338
PO BOX 339, POMFRET CENTER, CT 06259-0339
PO BOX 340, POMFRET CENTER, CT 06259-0340
PO BOX 341, POMFRET CENTER, CT 06259-0341
PO BOX 342, POMFRET CENTER, CT 06259-0342
PO BOX 343, POMFRET CENTER, CT 06259-0343
PO BOX 344, POMFRET CENTER, CT 06259-0344
PO BOX 345, POMFRET CENTER, CT 06259-0345
PO BOX 346, POMFRET CENTER, CT 06259-0346
PO BOX 347, POMFRET CENTER, CT 06259-0347
PO BOX 348, POMFRET CENTER, CT 06259-0348
PO BOX 349, POMFRET CENTER, CT 06259-0349
PO BOX 350, POMFRET CENTER, CT 06259-0350
PO BOX 351, POMFRET CENTER, CT 06259-0351
PO BOX 352, POMFRET CENTER, CT 06259-0352
PO BOX 353, POMFRET CENTER, CT 06259-0353
PO BOX 354, POMFRET CENTER, CT 06259-0354
PO BOX 355, POMFRET CENTER, CT 06259-0355
PO BOX 356, POMFRET CENTER, CT 06259-0356
PO BOX 357, POMFRET CENTER, CT 06259-0357
PO BOX 358, POMFRET CENTER, CT 06259-0358
PO BOX 359, POMFRET CENTER, CT 06259-0359
PO BOX 360, POMFRET CENTER, CT 06259-0360
PO BOX 361, POMFRET CENTER, CT 06259-0361
PO BOX 362, POMFRET CENTER, CT 06259-0362
PO BOX 363, POMFRET CENTER, CT 06259-0363
PO BOX 364, POMFRET CENTER, CT 06259-0364
PO BOX 365, POMFRET CENTER, CT 06259-0365
PO BOX 366, POMFRET CENTER, CT 06259-0366
PO BOX 367, POMFRET CENTER, CT 06259-0367
PO BOX 368, POMFRET CENTER, CT 06259-0368
PO BOX 369, POMFRET CENTER, CT 06259-0369
PO BOX 370, POMFRET CENTER, CT 06259-0370
PO BOX 371, POMFRET CENTER, CT 06259-0371
PO BOX 372, POMFRET CENTER, CT 06259-0372
PO BOX 373, POMFRET CENTER, CT 06259-0373
PO BOX 374, POMFRET CENTER, CT 06259-0374
PO BOX 375, POMFRET CENTER, CT 06259-0375
PO BOX 376, POMFRET CENTER, CT 06259-0376
PO BOX 377, POMFRET CENTER, CT 06259-0377
PO BOX 378, POMFRET CENTER, CT 06259-0378
PO BOX 379, POMFRET CENTER, CT 06259-0379
PO BOX 380, POMFRET CENTER, CT 06259-0380
PO BOX 381, POMFRET CENTER, CT 06259-0381
PO BOX 382, POMFRET CENTER, CT 06259-0382
PO BOX 383, POMFRET CENTER, CT 06259-0383
PO BOX 384, POMFRET CENTER, CT 06259-0384
PO BOX 385, POMFRET CENTER, CT 06259-0385
PO BOX 386, POMFRET CENTER, CT 06259-0386
PO BOX 387, POMFRET CENTER, CT 06259-0387
PO BOX 388, POMFRET CENTER, CT 06259-0388
PO BOX 389, POMFRET CENTER, CT 06259-0389
PO BOX 390, POMFRET CENTER, CT 06259-0390
PO BOX 391, POMFRET CENTER, CT 06259-0391
PO BOX 392, POMFRET CENTER, CT 06259-0392
PO BOX 393, POMFRET CENTER, CT 06259-0393
PO BOX 394, POMFRET CENTER, CT 06259-0394
PO BOX 395, POMFRET CENTER, CT 06259-0395
PO BOX 396, POMFRET CENTER, CT 06259-0396
PO BOX 397, POMFRET CENTER, CT 06259-0397
PO BOX 398, POMFRET CENTER, CT 06259-0398
PO BOX 399, POMFRET CENTER, CT 06259-0399
PO BOX 400, POMFRET CENTER, CT 06259-0400
PO BOX 401, POMFRET CENTER, CT 06259-0401
PO BOX 402, POMFRET CENTER, CT 06259-0402
PO BOX 403, POMFRET CENTER, CT 06259-0403
PO BOX 404, POMFRET CENTER, CT 06259-0404
PO BOX 405, POMFRET CENTER, CT 06259-0405
PO BOX 406, POMFRET CENTER, CT 06259-0406
PO BOX 407, POMFRET CENTER, CT 06259-0407
PO BOX 408, POMFRET CENTER, CT 06259-0408
PO BOX 409, POMFRET CENTER, CT 06259-0409
PO BOX 410, POMFRET CENTER, CT 06259-0410
PO BOX 411, POMFRET CENTER, CT 06259-0411
PO BOX 412, POMFRET CENTER, CT 06259-0412
PO BOX 413, POMFRET CENTER, CT 06259-0413
PO BOX 414, POMFRET CENTER, CT 06259-0414
PO BOX 415, POMFRET CENTER, CT 06259-0415
PO BOX 416, POMFRET CENTER, CT 06259-0416
PO BOX 417, POMFRET CENTER, CT 06259-0417
PO BOX 418, POMFRET CENTER, CT 06259-0418
PO BOX 419, POMFRET CENTER, CT 06259-0419
PO BOX 420, POMFRET CENTER, CT 06259-0420
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