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 241, DUNN, NC 28335-0241
PO BOX 242, DUNN, NC 28335-0242
PO BOX 243, DUNN, NC 28335-0243
PO BOX 244, DUNN, NC 28335-0244
PO BOX 245, DUNN, NC 28335-0245
PO BOX 246, DUNN, NC 28335-0246
PO BOX 247, DUNN, NC 28335-0247
PO BOX 248, DUNN, NC 28335-0248
PO BOX 249, DUNN, NC 28335-0249
PO BOX 250, DUNN, NC 28335-0250
PO BOX 251, DUNN, NC 28335-0251
PO BOX 252, DUNN, NC 28335-0252
PO BOX 253, DUNN, NC 28335-0253
PO BOX 254, DUNN, NC 28335-0254
PO BOX 255, DUNN, NC 28335-0255
PO BOX 256, DUNN, NC 28335-0256
PO BOX 257, DUNN, NC 28335-0257
PO BOX 258, DUNN, NC 28335-0258
PO BOX 259, DUNN, NC 28335-0259
PO BOX 260, DUNN, NC 28335-0260
PO BOX 261, DUNN, NC 28335-0261
PO BOX 262, DUNN, NC 28335-0262
PO BOX 263, DUNN, NC 28335-0263
PO BOX 264, DUNN, NC 28335-0264
PO BOX 265, DUNN, NC 28335-0265
PO BOX 266, DUNN, NC 28335-0266
PO BOX 267, DUNN, NC 28335-0267
PO BOX 268, DUNN, NC 28335-0268
PO BOX 269, DUNN, NC 28335-0269
PO BOX 270, DUNN, NC 28335-0270
PO BOX 271, DUNN, NC 28335-0271
PO BOX 272, DUNN, NC 28335-0272
PO BOX 273, DUNN, NC 28335-0273
PO BOX 274, DUNN, NC 28335-0274
PO BOX 275, DUNN, NC 28335-0275
PO BOX 276, DUNN, NC 28335-0276
PO BOX 277, DUNN, NC 28335-0277
PO BOX 278, DUNN, NC 28335-0278
PO BOX 279, DUNN, NC 28335-0279
PO BOX 280, DUNN, NC 28335-0280
PO BOX 281, DUNN, NC 28335-0281
PO BOX 282, DUNN, NC 28335-0282
PO BOX 283, DUNN, NC 28335-0283
PO BOX 284, DUNN, NC 28335-0284
PO BOX 285, DUNN, NC 28335-0285
PO BOX 286, DUNN, NC 28335-0286
PO BOX 287, DUNN, NC 28335-0287
PO BOX 288, DUNN, NC 28335-0288
PO BOX 289, DUNN, NC 28335-0289
PO BOX 290, DUNN, NC 28335-0290
PO BOX 291, DUNN, NC 28335-0291
PO BOX 292, DUNN, NC 28335-0292
PO BOX 293, DUNN, NC 28335-0293
PO BOX 294, DUNN, NC 28335-0294
PO BOX 295, DUNN, NC 28335-0295
PO BOX 296, DUNN, NC 28335-0296
PO BOX 297, DUNN, NC 28335-0297
PO BOX 298, DUNN, NC 28335-0298
PO BOX 299, DUNN, NC 28335-0299
PO BOX 300, DUNN, NC 28335-0300
PO BOX 301, DUNN, NC 28335-0301
PO BOX 302, DUNN, NC 28335-0302
PO BOX 303, DUNN, NC 28335-0303
PO BOX 304, DUNN, NC 28335-0304
PO BOX 305, DUNN, NC 28335-0305
PO BOX 306, DUNN, NC 28335-0306
PO BOX 307, DUNN, NC 28335-0307
PO BOX 308, DUNN, NC 28335-0308
PO BOX 309, DUNN, NC 28335-0309
PO BOX 310, DUNN, NC 28335-0310
PO BOX 311, DUNN, NC 28335-0311
PO BOX 312, DUNN, NC 28335-0312
PO BOX 313, DUNN, NC 28335-0313
PO BOX 314, DUNN, NC 28335-0314
PO BOX 315, DUNN, NC 28335-0315
PO BOX 316, DUNN, NC 28335-0316
PO BOX 317, DUNN, NC 28335-0317
PO BOX 318, DUNN, NC 28335-0318
PO BOX 319, DUNN, NC 28335-0319
PO BOX 320, DUNN, NC 28335-0320
PO BOX 321, DUNN, NC 28335-0321
PO BOX 322, DUNN, NC 28335-0322
PO BOX 323, DUNN, NC 28335-0323
PO BOX 324, DUNN, NC 28335-0324
PO BOX 325, DUNN, NC 28335-0325
PO BOX 326, DUNN, NC 28335-0326
PO BOX 327, DUNN, NC 28335-0327
PO BOX 328, DUNN, NC 28335-0328
PO BOX 329, DUNN, NC 28335-0329
PO BOX 330, DUNN, NC 28335-0330
PO BOX 331, DUNN, NC 28335-0331
PO BOX 332, DUNN, NC 28335-0332
PO BOX 333, DUNN, NC 28335-0333
PO BOX 334, DUNN, NC 28335-0334
PO BOX 335, DUNN, NC 28335-0335
PO BOX 336, DUNN, NC 28335-0336
PO BOX 337, DUNN, NC 28335-0337
PO BOX 338, DUNN, NC 28335-0338
PO BOX 339, DUNN, NC 28335-0339
PO BOX 340, DUNN, NC 28335-0340
PO BOX 341, DUNN, NC 28335-0341
PO BOX 342, DUNN, NC 28335-0342
PO BOX 343, DUNN, NC 28335-0343
PO BOX 344, DUNN, NC 28335-0344
PO BOX 345, DUNN, NC 28335-0345
PO BOX 346, DUNN, NC 28335-0346
PO BOX 347, DUNN, NC 28335-0347
PO BOX 348, DUNN, NC 28335-0348
PO BOX 349, DUNN, NC 28335-0349
PO BOX 350, DUNN, NC 28335-0350
PO BOX 351, DUNN, NC 28335-0351
PO BOX 352, DUNN, NC 28335-0352
PO BOX 353, DUNN, NC 28335-0353
PO BOX 354, DUNN, NC 28335-0354
PO BOX 355, DUNN, NC 28335-0355
PO BOX 356, DUNN, NC 28335-0356
PO BOX 357, DUNN, NC 28335-0357
PO BOX 358, DUNN, NC 28335-0358
PO BOX 359, DUNN, NC 28335-0359
PO BOX 360, DUNN, NC 28335-0360
PO BOX 361, DUNN, NC 28335-0361
PO BOX 362, DUNN, NC 28335-0362
PO BOX 363, DUNN, NC 28335-0363
PO BOX 364, DUNN, NC 28335-0364
PO BOX 365, DUNN, NC 28335-0365
PO BOX 366, DUNN, NC 28335-0366
PO BOX 367, DUNN, NC 28335-0367
PO BOX 368, DUNN, NC 28335-0368
PO BOX 369, DUNN, NC 28335-0369
PO BOX 370, DUNN, NC 28335-0370
PO BOX 371, DUNN, NC 28335-0371
PO BOX 372, DUNN, NC 28335-0372
PO BOX 373, DUNN, NC 28335-0373
PO BOX 374, DUNN, NC 28335-0374
PO BOX 375, DUNN, NC 28335-0375
PO BOX 376, DUNN, NC 28335-0376
PO BOX 377, DUNN, NC 28335-0377
PO BOX 378, DUNN, NC 28335-0378
PO BOX 379, DUNN, NC 28335-0379
PO BOX 380, DUNN, NC 28335-0380
PO BOX 381, DUNN, NC 28335-0381
PO BOX 382, DUNN, NC 28335-0382
PO BOX 383, DUNN, NC 28335-0383
PO BOX 384, DUNN, NC 28335-0384
PO BOX 385, DUNN, NC 28335-0385
PO BOX 386, DUNN, NC 28335-0386
PO BOX 387, DUNN, NC 28335-0387
PO BOX 388, DUNN, NC 28335-0388
PO BOX 389, DUNN, NC 28335-0389
PO BOX 390, DUNN, NC 28335-0390
PO BOX 391, DUNN, NC 28335-0391
PO BOX 392, DUNN, NC 28335-0392
PO BOX 393, DUNN, NC 28335-0393
PO BOX 394, DUNN, NC 28335-0394
PO BOX 395, DUNN, NC 28335-0395
PO BOX 396, DUNN, NC 28335-0396
PO BOX 397, DUNN, NC 28335-0397
PO BOX 398, DUNN, NC 28335-0398
PO BOX 399, DUNN, NC 28335-0399
PO BOX 400, DUNN, NC 28335-0400
PO BOX 401, DUNN, NC 28335-0401
PO BOX 402, DUNN, NC 28335-0402
PO BOX 403, DUNN, NC 28335-0403
PO BOX 404, DUNN, NC 28335-0404
PO BOX 405, DUNN, NC 28335-0405
PO BOX 406, DUNN, NC 28335-0406
PO BOX 407, DUNN, NC 28335-0407
PO BOX 408, DUNN, NC 28335-0408
PO BOX 409, DUNN, NC 28335-0409
PO BOX 410, DUNN, NC 28335-0410
PO BOX 411, DUNN, NC 28335-0411
PO BOX 412, DUNN, NC 28335-0412
PO BOX 413, DUNN, NC 28335-0413
PO BOX 414, DUNN, NC 28335-0414
PO BOX 415, DUNN, NC 28335-0415
PO BOX 416, DUNN, NC 28335-0416
PO BOX 417, DUNN, NC 28335-0417
PO BOX 418, DUNN, NC 28335-0418
PO BOX 419, DUNN, NC 28335-0419
PO BOX 420, DUNN, NC 28335-0420
PO BOX 421, DUNN, NC 28335-0421
PO BOX 422, DUNN, NC 28335-0422
PO BOX 423, DUNN, NC 28335-0423
PO BOX 424, DUNN, NC 28335-0424
PO BOX 425, DUNN, NC 28335-0425
PO BOX 426, DUNN, NC 28335-0426
PO BOX 427, DUNN, NC 28335-0427
PO BOX 428, DUNN, NC 28335-0428
PO BOX 429, DUNN, NC 28335-0429
PO BOX 430, DUNN, NC 28335-0430
PO BOX 431, DUNN, NC 28335-0431
PO BOX 432, DUNN, NC 28335-0432
PO BOX 433, DUNN, NC 28335-0433
PO BOX 434, DUNN, NC 28335-0434
PO BOX 435, DUNN, NC 28335-0435
PO BOX 436, DUNN, NC 28335-0436
PO BOX 437, DUNN, NC 28335-0437
PO BOX 438, DUNN, NC 28335-0438
PO BOX 439, DUNN, NC 28335-0439
PO BOX 440, DUNN, NC 28335-0440
PO BOX 441, DUNN, NC 28335-0441
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