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, CHRISTIANSBURG, VA 24068-0241
PO BOX 242, CHRISTIANSBURG, VA 24068-0242
PO BOX 243, CHRISTIANSBURG, VA 24068-0243
PO BOX 244, CHRISTIANSBURG, VA 24068-0244
PO BOX 245, CHRISTIANSBURG, VA 24068-0245
PO BOX 246, CHRISTIANSBURG, VA 24068-0246
PO BOX 247, CHRISTIANSBURG, VA 24068-0247
PO BOX 248, CHRISTIANSBURG, VA 24068-0248
PO BOX 249, CHRISTIANSBURG, VA 24068-0249
PO BOX 250, CHRISTIANSBURG, VA 24068-0250
PO BOX 251, CHRISTIANSBURG, VA 24068-0251
PO BOX 252, CHRISTIANSBURG, VA 24068-0252
PO BOX 253, CHRISTIANSBURG, VA 24068-0253
PO BOX 254, CHRISTIANSBURG, VA 24068-0254
PO BOX 255, CHRISTIANSBURG, VA 24068-0255
PO BOX 256, CHRISTIANSBURG, VA 24068-0256
PO BOX 257, CHRISTIANSBURG, VA 24068-0257
PO BOX 258, CHRISTIANSBURG, VA 24068-0258
PO BOX 259, CHRISTIANSBURG, VA 24068-0259
PO BOX 260, CHRISTIANSBURG, VA 24068-0260
PO BOX 261, CHRISTIANSBURG, VA 24068-0261
PO BOX 262, CHRISTIANSBURG, VA 24068-0262
PO BOX 263, CHRISTIANSBURG, VA 24068-0263
PO BOX 264, CHRISTIANSBURG, VA 24068-0264
PO BOX 265, CHRISTIANSBURG, VA 24068-0265
PO BOX 266, CHRISTIANSBURG, VA 24068-0266
PO BOX 267, CHRISTIANSBURG, VA 24068-0267
PO BOX 268, CHRISTIANSBURG, VA 24068-0268
PO BOX 269, CHRISTIANSBURG, VA 24068-0269
PO BOX 270, CHRISTIANSBURG, VA 24068-0270
PO BOX 271, CHRISTIANSBURG, VA 24068-0271
PO BOX 272, CHRISTIANSBURG, VA 24068-0272
PO BOX 273, CHRISTIANSBURG, VA 24068-0273
PO BOX 274, CHRISTIANSBURG, VA 24068-0274
PO BOX 275, CHRISTIANSBURG, VA 24068-0275
PO BOX 276, CHRISTIANSBURG, VA 24068-0276
PO BOX 277, CHRISTIANSBURG, VA 24068-0277
PO BOX 278, CHRISTIANSBURG, VA 24068-0278
PO BOX 279, CHRISTIANSBURG, VA 24068-0279
PO BOX 280, CHRISTIANSBURG, VA 24068-0280
PO BOX 281, CHRISTIANSBURG, VA 24068-0281
PO BOX 282, CHRISTIANSBURG, VA 24068-0282
PO BOX 283, CHRISTIANSBURG, VA 24068-0283
PO BOX 284, CHRISTIANSBURG, VA 24068-0284
PO BOX 285, CHRISTIANSBURG, VA 24068-0285
PO BOX 286, CHRISTIANSBURG, VA 24068-0286
PO BOX 287, CHRISTIANSBURG, VA 24068-0287
PO BOX 288, CHRISTIANSBURG, VA 24068-0288
PO BOX 289, CHRISTIANSBURG, VA 24068-0289
PO BOX 290, CHRISTIANSBURG, VA 24068-0290
PO BOX 291, CHRISTIANSBURG, VA 24068-0291
PO BOX 292, CHRISTIANSBURG, VA 24068-0292
PO BOX 293, CHRISTIANSBURG, VA 24068-0293
PO BOX 294, CHRISTIANSBURG, VA 24068-0294
PO BOX 295, CHRISTIANSBURG, VA 24068-0295
PO BOX 296, CHRISTIANSBURG, VA 24068-0296
PO BOX 297, CHRISTIANSBURG, VA 24068-0297
PO BOX 298, CHRISTIANSBURG, VA 24068-0298
PO BOX 299, CHRISTIANSBURG, VA 24068-0299
PO BOX 300, CHRISTIANSBURG, VA 24068-0300
PO BOX 301, CHRISTIANSBURG, VA 24068-0301
PO BOX 302, CHRISTIANSBURG, VA 24068-0302
PO BOX 303, CHRISTIANSBURG, VA 24068-0303
PO BOX 304, CHRISTIANSBURG, VA 24068-0304
PO BOX 305, CHRISTIANSBURG, VA 24068-0305
PO BOX 306, CHRISTIANSBURG, VA 24068-0306
PO BOX 307, CHRISTIANSBURG, VA 24068-0307
PO BOX 308, CHRISTIANSBURG, VA 24068-0308
PO BOX 309, CHRISTIANSBURG, VA 24068-0309
PO BOX 310, CHRISTIANSBURG, VA 24068-0310
PO BOX 311, CHRISTIANSBURG, VA 24068-0311
PO BOX 312, CHRISTIANSBURG, VA 24068-0312
PO BOX 313, CHRISTIANSBURG, VA 24068-0313
PO BOX 314, CHRISTIANSBURG, VA 24068-0314
PO BOX 315, CHRISTIANSBURG, VA 24068-0315
PO BOX 316, CHRISTIANSBURG, VA 24068-0316
PO BOX 317, CHRISTIANSBURG, VA 24068-0317
PO BOX 318, CHRISTIANSBURG, VA 24068-0318
PO BOX 319, CHRISTIANSBURG, VA 24068-0319
PO BOX 320, CHRISTIANSBURG, VA 24068-0320
PO BOX 321, CHRISTIANSBURG, VA 24068-0321
PO BOX 322, CHRISTIANSBURG, VA 24068-0322
PO BOX 323, CHRISTIANSBURG, VA 24068-0323
PO BOX 324, CHRISTIANSBURG, VA 24068-0324
PO BOX 325, CHRISTIANSBURG, VA 24068-0325
PO BOX 326, CHRISTIANSBURG, VA 24068-0326
PO BOX 327, CHRISTIANSBURG, VA 24068-0327
PO BOX 328, CHRISTIANSBURG, VA 24068-0328
PO BOX 329, CHRISTIANSBURG, VA 24068-0329
PO BOX 330, CHRISTIANSBURG, VA 24068-0330
PO BOX 331, CHRISTIANSBURG, VA 24068-0331
PO BOX 332, CHRISTIANSBURG, VA 24068-0332
PO BOX 333, CHRISTIANSBURG, VA 24068-0333
PO BOX 334, CHRISTIANSBURG, VA 24068-0334
PO BOX 335, CHRISTIANSBURG, VA 24068-0335
PO BOX 336, CHRISTIANSBURG, VA 24068-0336
PO BOX 337, CHRISTIANSBURG, VA 24068-0337
PO BOX 338, CHRISTIANSBURG, VA 24068-0338
PO BOX 339, CHRISTIANSBURG, VA 24068-0339
PO BOX 340, CHRISTIANSBURG, VA 24068-0340
PO BOX 341, CHRISTIANSBURG, VA 24068-0341
PO BOX 342, CHRISTIANSBURG, VA 24068-0342
PO BOX 343, CHRISTIANSBURG, VA 24068-0343
PO BOX 344, CHRISTIANSBURG, VA 24068-0344
PO BOX 345, CHRISTIANSBURG, VA 24068-0345
PO BOX 346, CHRISTIANSBURG, VA 24068-0346
PO BOX 347, CHRISTIANSBURG, VA 24068-0347
PO BOX 348, CHRISTIANSBURG, VA 24068-0348
PO BOX 349, CHRISTIANSBURG, VA 24068-0349
PO BOX 350, CHRISTIANSBURG, VA 24068-0350
PO BOX 351, CHRISTIANSBURG, VA 24068-0351
PO BOX 352, CHRISTIANSBURG, VA 24068-0352
PO BOX 353, CHRISTIANSBURG, VA 24068-0353
PO BOX 354, CHRISTIANSBURG, VA 24068-0354
PO BOX 355, CHRISTIANSBURG, VA 24068-0355
PO BOX 356, CHRISTIANSBURG, VA 24068-0356
PO BOX 357, CHRISTIANSBURG, VA 24068-0357
PO BOX 358, CHRISTIANSBURG, VA 24068-0358
PO BOX 359, CHRISTIANSBURG, VA 24068-0359
PO BOX 360, CHRISTIANSBURG, VA 24068-0360
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