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, UPPER MARLBORO, MD 20773-0241
PO BOX 242, UPPER MARLBORO, MD 20773-0242
PO BOX 243, UPPER MARLBORO, MD 20773-0243
PO BOX 244, UPPER MARLBORO, MD 20773-0244
PO BOX 245, UPPER MARLBORO, MD 20773-0245
PO BOX 246, UPPER MARLBORO, MD 20773-0246
PO BOX 247, UPPER MARLBORO, MD 20773-0247
PO BOX 248, UPPER MARLBORO, MD 20773-0248
PO BOX 249, UPPER MARLBORO, MD 20773-0249
PO BOX 250, UPPER MARLBORO, MD 20773-0250
PO BOX 251, UPPER MARLBORO, MD 20773-0251
PO BOX 252, UPPER MARLBORO, MD 20773-0252
PO BOX 253, UPPER MARLBORO, MD 20773-0253
PO BOX 254, UPPER MARLBORO, MD 20773-0254
PO BOX 255, UPPER MARLBORO, MD 20773-0255
PO BOX 256, UPPER MARLBORO, MD 20773-0256
PO BOX 257, UPPER MARLBORO, MD 20773-0257
PO BOX 258, UPPER MARLBORO, MD 20773-0258
PO BOX 259, UPPER MARLBORO, MD 20773-0259
PO BOX 260, UPPER MARLBORO, MD 20773-0260
PO BOX 261, UPPER MARLBORO, MD 20773-0261
PO BOX 262, UPPER MARLBORO, MD 20773-0262
PO BOX 263, UPPER MARLBORO, MD 20773-0263
PO BOX 264, UPPER MARLBORO, MD 20773-0264
PO BOX 265, UPPER MARLBORO, MD 20773-0265
PO BOX 266, UPPER MARLBORO, MD 20773-0266
PO BOX 267, UPPER MARLBORO, MD 20773-0267
PO BOX 268, UPPER MARLBORO, MD 20773-0268
PO BOX 269, UPPER MARLBORO, MD 20773-0269
PO BOX 270, UPPER MARLBORO, MD 20773-0270
PO BOX 271, UPPER MARLBORO, MD 20773-0271
PO BOX 272, UPPER MARLBORO, MD 20773-0272
PO BOX 273, UPPER MARLBORO, MD 20773-0273
PO BOX 274, UPPER MARLBORO, MD 20773-0274
PO BOX 275, UPPER MARLBORO, MD 20773-0275
PO BOX 276, UPPER MARLBORO, MD 20773-0276
PO BOX 277, UPPER MARLBORO, MD 20773-0277
PO BOX 278, UPPER MARLBORO, MD 20773-0278
PO BOX 279, UPPER MARLBORO, MD 20773-0279
PO BOX 280, UPPER MARLBORO, MD 20773-0280
PO BOX 281, UPPER MARLBORO, MD 20773-0281
PO BOX 282, UPPER MARLBORO, MD 20773-0282
PO BOX 283, UPPER MARLBORO, MD 20773-0283
PO BOX 284, UPPER MARLBORO, MD 20773-0284
PO BOX 285, UPPER MARLBORO, MD 20773-0285
PO BOX 286, UPPER MARLBORO, MD 20773-0286
PO BOX 287, UPPER MARLBORO, MD 20773-0287
PO BOX 288, UPPER MARLBORO, MD 20773-0288
PO BOX 289, UPPER MARLBORO, MD 20773-0289
PO BOX 290, UPPER MARLBORO, MD 20773-0290
PO BOX 291, UPPER MARLBORO, MD 20773-0291
PO BOX 292, UPPER MARLBORO, MD 20773-0292
PO BOX 293, UPPER MARLBORO, MD 20773-0293
PO BOX 294, UPPER MARLBORO, MD 20773-0294
PO BOX 295, UPPER MARLBORO, MD 20773-0295
PO BOX 296, UPPER MARLBORO, MD 20773-0296
PO BOX 297, UPPER MARLBORO, MD 20773-0297
PO BOX 298, UPPER MARLBORO, MD 20773-0298
PO BOX 299, UPPER MARLBORO, MD 20773-0299
PO BOX 300, UPPER MARLBORO, MD 20773-0300
PO BOX 301, UPPER MARLBORO, MD 20773-0301
PO BOX 302, UPPER MARLBORO, MD 20773-0302
PO BOX 303, UPPER MARLBORO, MD 20773-0303
PO BOX 304, UPPER MARLBORO, MD 20773-0304
PO BOX 305, UPPER MARLBORO, MD 20773-0305
PO BOX 306, UPPER MARLBORO, MD 20773-0306
PO BOX 307, UPPER MARLBORO, MD 20773-0307
PO BOX 308, UPPER MARLBORO, MD 20773-0308
PO BOX 309, UPPER MARLBORO, MD 20773-0309
PO BOX 310, UPPER MARLBORO, MD 20773-0310
PO BOX 311, UPPER MARLBORO, MD 20773-0311
PO BOX 312, UPPER MARLBORO, MD 20773-0312
PO BOX 313, UPPER MARLBORO, MD 20773-0313
PO BOX 314, UPPER MARLBORO, MD 20773-0314
PO BOX 315, UPPER MARLBORO, MD 20773-0315
PO BOX 316, UPPER MARLBORO, MD 20773-0316
PO BOX 317, UPPER MARLBORO, MD 20773-0317
PO BOX 318, UPPER MARLBORO, MD 20773-0318
PO BOX 319, UPPER MARLBORO, MD 20773-0319
PO BOX 320, UPPER MARLBORO, MD 20773-0320
PO BOX 321, UPPER MARLBORO, MD 20773-0321
PO BOX 322, UPPER MARLBORO, MD 20773-0322
PO BOX 323, UPPER MARLBORO, MD 20773-0323
PO BOX 324, UPPER MARLBORO, MD 20773-0324
PO BOX 325, UPPER MARLBORO, MD 20773-0325
PO BOX 326, UPPER MARLBORO, MD 20773-0326
PO BOX 327, UPPER MARLBORO, MD 20773-0327
PO BOX 328, UPPER MARLBORO, MD 20773-0328
PO BOX 329, UPPER MARLBORO, MD 20773-0329
PO BOX 330, UPPER MARLBORO, MD 20773-0330
PO BOX 331, UPPER MARLBORO, MD 20773-0331
PO BOX 332, UPPER MARLBORO, MD 20773-0332
PO BOX 333, UPPER MARLBORO, MD 20773-0333
PO BOX 334, UPPER MARLBORO, MD 20773-0334
PO BOX 335, UPPER MARLBORO, MD 20773-0335
PO BOX 336, UPPER MARLBORO, MD 20773-0336
PO BOX 337, UPPER MARLBORO, MD 20773-0337
PO BOX 338, UPPER MARLBORO, MD 20773-0338
PO BOX 339, UPPER MARLBORO, MD 20773-0339
PO BOX 340, UPPER MARLBORO, MD 20773-0340
PO BOX 341, UPPER MARLBORO, MD 20773-0341
PO BOX 342, UPPER MARLBORO, MD 20773-0342
PO BOX 343, UPPER MARLBORO, MD 20773-0343
PO BOX 344, UPPER MARLBORO, MD 20773-0344
PO BOX 345, UPPER MARLBORO, MD 20773-0345
PO BOX 346, UPPER MARLBORO, MD 20773-0346
PO BOX 347, UPPER MARLBORO, MD 20773-0347
PO BOX 348, UPPER MARLBORO, MD 20773-0348
PO BOX 349, UPPER MARLBORO, MD 20773-0349
PO BOX 350, UPPER MARLBORO, MD 20773-0350
PO BOX 351, UPPER MARLBORO, MD 20773-0351
PO BOX 352, UPPER MARLBORO, MD 20773-0352
PO BOX 353, UPPER MARLBORO, MD 20773-0353
PO BOX 354, UPPER MARLBORO, MD 20773-0354
PO BOX 355, UPPER MARLBORO, MD 20773-0355
PO BOX 356, UPPER MARLBORO, MD 20773-0356
PO BOX 357, UPPER MARLBORO, MD 20773-0357
PO BOX 358, UPPER MARLBORO, MD 20773-0358
PO BOX 359, UPPER MARLBORO, MD 20773-0359
PO BOX 360, UPPER MARLBORO, MD 20773-0360
Add new comment