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 5241, COLORADO SPRINGS, CO 80931-5241
PO BOX 5242, COLORADO SPRINGS, CO 80931-5242
PO BOX 5243, COLORADO SPRINGS, CO 80931-5243
PO BOX 5244, COLORADO SPRINGS, CO 80931-5244
PO BOX 5245, COLORADO SPRINGS, CO 80931-5245
PO BOX 5246, COLORADO SPRINGS, CO 80931-5246
PO BOX 5247, COLORADO SPRINGS, CO 80931-5247
PO BOX 5248, COLORADO SPRINGS, CO 80931-5248
PO BOX 5249, COLORADO SPRINGS, CO 80931-5249
PO BOX 5250, COLORADO SPRINGS, CO 80931-5250
PO BOX 5251, COLORADO SPRINGS, CO 80931-5251
PO BOX 5252, COLORADO SPRINGS, CO 80931-5252
PO BOX 5253, COLORADO SPRINGS, CO 80931-5253
PO BOX 5254, COLORADO SPRINGS, CO 80931-5254
PO BOX 5255, COLORADO SPRINGS, CO 80931-5255
PO BOX 5256, COLORADO SPRINGS, CO 80931-5256
PO BOX 5257, COLORADO SPRINGS, CO 80931-5257
PO BOX 5258, COLORADO SPRINGS, CO 80931-5258
PO BOX 5259, COLORADO SPRINGS, CO 80931-5259
PO BOX 5260, COLORADO SPRINGS, CO 80931-5260
PO BOX 5261, COLORADO SPRINGS, CO 80931-5261
PO BOX 5262, COLORADO SPRINGS, CO 80931-5262
PO BOX 5263, COLORADO SPRINGS, CO 80931-5263
PO BOX 5264, COLORADO SPRINGS, CO 80931-5264
PO BOX 5265, COLORADO SPRINGS, CO 80931-5265
PO BOX 5266, COLORADO SPRINGS, CO 80931-5266
PO BOX 5267, COLORADO SPRINGS, CO 80931-5267
PO BOX 5268, COLORADO SPRINGS, CO 80931-5268
PO BOX 5269, COLORADO SPRINGS, CO 80931-5269
PO BOX 5270, COLORADO SPRINGS, CO 80931-5270
PO BOX 5271, COLORADO SPRINGS, CO 80931-5271
PO BOX 5272, COLORADO SPRINGS, CO 80931-5272
PO BOX 5273, COLORADO SPRINGS, CO 80931-5273
PO BOX 5274, COLORADO SPRINGS, CO 80931-5274
PO BOX 5275, COLORADO SPRINGS, CO 80931-5275
PO BOX 5276, COLORADO SPRINGS, CO 80931-5276
PO BOX 5277, COLORADO SPRINGS, CO 80931-5277
PO BOX 5278, COLORADO SPRINGS, CO 80931-5278
PO BOX 5279, COLORADO SPRINGS, CO 80931-5279
PO BOX 5280, COLORADO SPRINGS, CO 80931-5280
PO BOX 5281, COLORADO SPRINGS, CO 80931-5281
PO BOX 5282, COLORADO SPRINGS, CO 80931-5282
PO BOX 5283, COLORADO SPRINGS, CO 80931-5283
PO BOX 5284, COLORADO SPRINGS, CO 80931-5284
PO BOX 5285, COLORADO SPRINGS, CO 80931-5285
PO BOX 5286, COLORADO SPRINGS, CO 80931-5286
PO BOX 5287, COLORADO SPRINGS, CO 80931-5287
PO BOX 5288, COLORADO SPRINGS, CO 80931-5288
PO BOX 5289, COLORADO SPRINGS, CO 80931-5289
PO BOX 5290, COLORADO SPRINGS, CO 80931-5290
PO BOX 5291, COLORADO SPRINGS, CO 80931-5291
PO BOX 5292, COLORADO SPRINGS, CO 80931-5292
PO BOX 5293, COLORADO SPRINGS, CO 80931-5293
PO BOX 5294, COLORADO SPRINGS, CO 80931-5294
PO BOX 5295, COLORADO SPRINGS, CO 80931-5295
PO BOX 5296, COLORADO SPRINGS, CO 80931-5296
PO BOX 5297, COLORADO SPRINGS, CO 80931-5297
PO BOX 5298, COLORADO SPRINGS, CO 80931-5298
PO BOX 5299, COLORADO SPRINGS, CO 80931-5299
PO BOX 5300, COLORADO SPRINGS, CO 80931-5300
PO BOX 5301, COLORADO SPRINGS, CO 80931-5301
PO BOX 5302, COLORADO SPRINGS, CO 80931-5302
PO BOX 5303, COLORADO SPRINGS, CO 80931-5303
PO BOX 5304, COLORADO SPRINGS, CO 80931-5304
PO BOX 5305, COLORADO SPRINGS, CO 80931-5305
PO BOX 5306, COLORADO SPRINGS, CO 80931-5306
PO BOX 5307, COLORADO SPRINGS, CO 80931-5307
PO BOX 5308, COLORADO SPRINGS, CO 80931-5308
PO BOX 5309, COLORADO SPRINGS, CO 80931-5309
PO BOX 5310, COLORADO SPRINGS, CO 80931-5310
PO BOX 5311, COLORADO SPRINGS, CO 80931-5311
PO BOX 5312, COLORADO SPRINGS, CO 80931-5312
PO BOX 5313, COLORADO SPRINGS, CO 80931-5313
PO BOX 5314, COLORADO SPRINGS, CO 80931-5314
PO BOX 5315, COLORADO SPRINGS, CO 80931-5315
PO BOX 5316, COLORADO SPRINGS, CO 80931-5316
PO BOX 5317, COLORADO SPRINGS, CO 80931-5317
PO BOX 5318, COLORADO SPRINGS, CO 80931-5318
PO BOX 5319, COLORADO SPRINGS, CO 80931-5319
PO BOX 5320, COLORADO SPRINGS, CO 80931-5320
PO BOX 5321, COLORADO SPRINGS, CO 80931-5321
PO BOX 5322, COLORADO SPRINGS, CO 80931-5322
PO BOX 5323, COLORADO SPRINGS, CO 80931-5323
PO BOX 5324, COLORADO SPRINGS, CO 80931-5324
PO BOX 5325, COLORADO SPRINGS, CO 80931-5325
PO BOX 5326, COLORADO SPRINGS, CO 80931-5326
PO BOX 5327, COLORADO SPRINGS, CO 80931-5327
PO BOX 5328, COLORADO SPRINGS, CO 80931-5328
PO BOX 5329, COLORADO SPRINGS, CO 80931-5329
PO BOX 5330, COLORADO SPRINGS, CO 80931-5330
PO BOX 5331, COLORADO SPRINGS, CO 80931-5331
PO BOX 5332, COLORADO SPRINGS, CO 80931-5332
PO BOX 5333, COLORADO SPRINGS, CO 80931-5333
PO BOX 5334, COLORADO SPRINGS, CO 80931-5334
PO BOX 5335, COLORADO SPRINGS, CO 80931-5335
PO BOX 5336, COLORADO SPRINGS, CO 80931-5336
PO BOX 5337, COLORADO SPRINGS, CO 80931-5337
PO BOX 5338, COLORADO SPRINGS, CO 80931-5338
PO BOX 5339, COLORADO SPRINGS, CO 80931-5339
PO BOX 5340, COLORADO SPRINGS, CO 80931-5340
PO BOX 5341, COLORADO SPRINGS, CO 80931-5341
PO BOX 5342, COLORADO SPRINGS, CO 80931-5342
PO BOX 5343, COLORADO SPRINGS, CO 80931-5343
PO BOX 5344, COLORADO SPRINGS, CO 80931-5344
PO BOX 5345, COLORADO SPRINGS, CO 80931-5345
PO BOX 5346, COLORADO SPRINGS, CO 80931-5346
PO BOX 5347, COLORADO SPRINGS, CO 80931-5347
PO BOX 5348, COLORADO SPRINGS, CO 80931-5348
PO BOX 5349, COLORADO SPRINGS, CO 80931-5349
PO BOX 5350, COLORADO SPRINGS, CO 80931-5350
PO BOX 5351, COLORADO SPRINGS, CO 80931-5351
PO BOX 5352, COLORADO SPRINGS, CO 80931-5352
PO BOX 5353, COLORADO SPRINGS, CO 80931-5353
PO BOX 5354, COLORADO SPRINGS, CO 80931-5354
PO BOX 5355, COLORADO SPRINGS, CO 80931-5355
PO BOX 5356, COLORADO SPRINGS, CO 80931-5356
PO BOX 5357, COLORADO SPRINGS, CO 80931-5357
PO BOX 5358, COLORADO SPRINGS, CO 80931-5358
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