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, MEDICINE PARK, OK 73557-0241
PO BOX 242, MEDICINE PARK, OK 73557-0242
PO BOX 243, MEDICINE PARK, OK 73557-0243
PO BOX 244, MEDICINE PARK, OK 73557-0244
PO BOX 245, MEDICINE PARK, OK 73557-0245
PO BOX 246, MEDICINE PARK, OK 73557-0246
PO BOX 247, MEDICINE PARK, OK 73557-0247
PO BOX 248, MEDICINE PARK, OK 73557-0248
PO BOX 249, MEDICINE PARK, OK 73557-0249
PO BOX 250, MEDICINE PARK, OK 73557-0250
PO BOX 251, MEDICINE PARK, OK 73557-0251
PO BOX 252, MEDICINE PARK, OK 73557-0252
PO BOX 253, MEDICINE PARK, OK 73557-0253
PO BOX 254, MEDICINE PARK, OK 73557-0254
PO BOX 255, MEDICINE PARK, OK 73557-0255
PO BOX 256, MEDICINE PARK, OK 73557-0256
PO BOX 257, MEDICINE PARK, OK 73557-0257
PO BOX 258, MEDICINE PARK, OK 73557-0258
PO BOX 259, MEDICINE PARK, OK 73557-0259
PO BOX 260, MEDICINE PARK, OK 73557-0260
PO BOX 261, MEDICINE PARK, OK 73557-0261
PO BOX 262, MEDICINE PARK, OK 73557-0262
PO BOX 263, MEDICINE PARK, OK 73557-0263
PO BOX 264, MEDICINE PARK, OK 73557-0264
PO BOX 265, MEDICINE PARK, OK 73557-0265
PO BOX 266, MEDICINE PARK, OK 73557-0266
PO BOX 267, MEDICINE PARK, OK 73557-0267
PO BOX 268, MEDICINE PARK, OK 73557-0268
PO BOX 269, MEDICINE PARK, OK 73557-0269
PO BOX 270, MEDICINE PARK, OK 73557-0270
PO BOX 271, MEDICINE PARK, OK 73557-0271
PO BOX 272, MEDICINE PARK, OK 73557-0272
PO BOX 273, MEDICINE PARK, OK 73557-0273
PO BOX 274, MEDICINE PARK, OK 73557-0274
PO BOX 275, MEDICINE PARK, OK 73557-0275
PO BOX 276, MEDICINE PARK, OK 73557-0276
PO BOX 277, MEDICINE PARK, OK 73557-0277
PO BOX 278, MEDICINE PARK, OK 73557-0278
PO BOX 279, MEDICINE PARK, OK 73557-0279
PO BOX 280, MEDICINE PARK, OK 73557-0280
PO BOX 281, MEDICINE PARK, OK 73557-0281
PO BOX 282, MEDICINE PARK, OK 73557-0282
PO BOX 283, MEDICINE PARK, OK 73557-0283
PO BOX 284, MEDICINE PARK, OK 73557-0284
PO BOX 285, MEDICINE PARK, OK 73557-0285
PO BOX 286, MEDICINE PARK, OK 73557-0286
PO BOX 287, MEDICINE PARK, OK 73557-0287
PO BOX 288, MEDICINE PARK, OK 73557-0288
PO BOX 289, MEDICINE PARK, OK 73557-0289
PO BOX 290, MEDICINE PARK, OK 73557-0290
PO BOX 291, MEDICINE PARK, OK 73557-0291
PO BOX 292, MEDICINE PARK, OK 73557-0292
PO BOX 293, MEDICINE PARK, OK 73557-0293
PO BOX 294, MEDICINE PARK, OK 73557-0294
PO BOX 295, MEDICINE PARK, OK 73557-0295
PO BOX 296, MEDICINE PARK, OK 73557-0296
PO BOX 297, MEDICINE PARK, OK 73557-0297
PO BOX 298, MEDICINE PARK, OK 73557-0298
PO BOX 299, MEDICINE PARK, OK 73557-0299
PO BOX 300, MEDICINE PARK, OK 73557-0300
PO BOX 301, MEDICINE PARK, OK 73557-0301
PO BOX 302, MEDICINE PARK, OK 73557-0302
PO BOX 303, MEDICINE PARK, OK 73557-0303
PO BOX 304, MEDICINE PARK, OK 73557-0304
PO BOX 305, MEDICINE PARK, OK 73557-0305
PO BOX 306, MEDICINE PARK, OK 73557-0306
PO BOX 307, MEDICINE PARK, OK 73557-0307
PO BOX 308, MEDICINE PARK, OK 73557-0308
PO BOX 309, MEDICINE PARK, OK 73557-0309
PO BOX 310, MEDICINE PARK, OK 73557-0310
PO BOX 311, MEDICINE PARK, OK 73557-0311
PO BOX 312, MEDICINE PARK, OK 73557-0312
PO BOX 313, MEDICINE PARK, OK 73557-0313
PO BOX 314, MEDICINE PARK, OK 73557-0314
PO BOX 315, MEDICINE PARK, OK 73557-0315
PO BOX 316, MEDICINE PARK, OK 73557-0316
PO BOX 317, MEDICINE PARK, OK 73557-0317
PO BOX 318, MEDICINE PARK, OK 73557-0318
PO BOX 319, MEDICINE PARK, OK 73557-0319
PO BOX 320, MEDICINE PARK, OK 73557-0320
PO BOX 321, MEDICINE PARK, OK 73557-0321
PO BOX 322, MEDICINE PARK, OK 73557-0322
PO BOX 323, MEDICINE PARK, OK 73557-0323
PO BOX 324, MEDICINE PARK, OK 73557-0324
PO BOX 325, MEDICINE PARK, OK 73557-0325
PO BOX 326, MEDICINE PARK, OK 73557-0326
PO BOX 327, MEDICINE PARK, OK 73557-0327
PO BOX 328, MEDICINE PARK, OK 73557-0328
PO BOX 329, MEDICINE PARK, OK 73557-0329
PO BOX 330, MEDICINE PARK, OK 73557-0330
PO BOX 331, MEDICINE PARK, OK 73557-0331
PO BOX 332, MEDICINE PARK, OK 73557-0332
PO BOX 333, MEDICINE PARK, OK 73557-0333
PO BOX 334, MEDICINE PARK, OK 73557-0334
PO BOX 335, MEDICINE PARK, OK 73557-0335
PO BOX 336, MEDICINE PARK, OK 73557-0336
PO BOX 337, MEDICINE PARK, OK 73557-0337
PO BOX 338, MEDICINE PARK, OK 73557-0338
PO BOX 339, MEDICINE PARK, OK 73557-0339
PO BOX 340, MEDICINE PARK, OK 73557-0340
PO BOX 341, MEDICINE PARK, OK 73557-0341
PO BOX 342, MEDICINE PARK, OK 73557-0342
PO BOX 343, MEDICINE PARK, OK 73557-0343
PO BOX 344, MEDICINE PARK, OK 73557-0344
PO BOX 345, MEDICINE PARK, OK 73557-0345
PO BOX 346, MEDICINE PARK, OK 73557-0346
PO BOX 347, MEDICINE PARK, OK 73557-0347
PO BOX 348, MEDICINE PARK, OK 73557-0348
PO BOX 349, MEDICINE PARK, OK 73557-0349
PO BOX 350, MEDICINE PARK, OK 73557-0350
PO BOX 351, MEDICINE PARK, OK 73557-0351
PO BOX 352, MEDICINE PARK, OK 73557-0352
PO BOX 353, MEDICINE PARK, OK 73557-0353
PO BOX 354, MEDICINE PARK, OK 73557-0354
PO BOX 355, MEDICINE PARK, OK 73557-0355
PO BOX 356, MEDICINE PARK, OK 73557-0356
PO BOX 357, MEDICINE PARK, OK 73557-0357
PO BOX 358, MEDICINE PARK, OK 73557-0358
PO BOX 359, MEDICINE PARK, OK 73557-0359
PO BOX 360, MEDICINE PARK, OK 73557-0360
PO BOX 361, MEDICINE PARK, OK 73557-0361
PO BOX 362, MEDICINE PARK, OK 73557-0362
PO BOX 363, MEDICINE PARK, OK 73557-0363
PO BOX 364, MEDICINE PARK, OK 73557-0364
PO BOX 365, MEDICINE PARK, OK 73557-0365
PO BOX 366, MEDICINE PARK, OK 73557-0366
PO BOX 367, MEDICINE PARK, OK 73557-0367
PO BOX 368, MEDICINE PARK, OK 73557-0368
PO BOX 369, MEDICINE PARK, OK 73557-0369
PO BOX 370, MEDICINE PARK, OK 73557-0370
PO BOX 371, MEDICINE PARK, OK 73557-0371
PO BOX 372, MEDICINE PARK, OK 73557-0372
PO BOX 373, MEDICINE PARK, OK 73557-0373
PO BOX 374, MEDICINE PARK, OK 73557-0374
PO BOX 375, MEDICINE PARK, OK 73557-0375
PO BOX 376, MEDICINE PARK, OK 73557-0376
PO BOX 377, MEDICINE PARK, OK 73557-0377
PO BOX 378, MEDICINE PARK, OK 73557-0378
PO BOX 379, MEDICINE PARK, OK 73557-0379
PO BOX 380, MEDICINE PARK, OK 73557-0380
PO BOX 381, MEDICINE PARK, OK 73557-0381
PO BOX 382, MEDICINE PARK, OK 73557-0382
PO BOX 383, MEDICINE PARK, OK 73557-0383
PO BOX 384, MEDICINE PARK, OK 73557-0384
PO BOX 385, MEDICINE PARK, OK 73557-0385
PO BOX 386, MEDICINE PARK, OK 73557-0386
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