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 10161, CHAPEL HILL, NC 27515-0161
PO BOX 10162, CHAPEL HILL, NC 27515-0162
PO BOX 10163, CHAPEL HILL, NC 27515-0163
PO BOX 10164, CHAPEL HILL, NC 27515-0164
PO BOX 10165, CHAPEL HILL, NC 27515-0165
PO BOX 10166, CHAPEL HILL, NC 27515-0166
PO BOX 10167, CHAPEL HILL, NC 27515-0167
PO BOX 10168, CHAPEL HILL, NC 27515-0168
PO BOX 10169, CHAPEL HILL, NC 27515-0169
PO BOX 10170, CHAPEL HILL, NC 27515-0170
PO BOX 10171, CHAPEL HILL, NC 27515-0171
PO BOX 10172, CHAPEL HILL, NC 27515-0172
PO BOX 10173, CHAPEL HILL, NC 27515-0173
PO BOX 10174, CHAPEL HILL, NC 27515-0174
PO BOX 10175, CHAPEL HILL, NC 27515-0175
PO BOX 10176, CHAPEL HILL, NC 27515-0176
PO BOX 10177, CHAPEL HILL, NC 27515-0177
PO BOX 10178, CHAPEL HILL, NC 27515-0178
PO BOX 10179, CHAPEL HILL, NC 27515-0179
PO BOX 10180, CHAPEL HILL, NC 27515-0180
PO BOX 10181, CHAPEL HILL, NC 27515-0181
PO BOX 10182, CHAPEL HILL, NC 27515-0182
PO BOX 10183, CHAPEL HILL, NC 27515-0183
PO BOX 10184, CHAPEL HILL, NC 27515-0184
PO BOX 10185, CHAPEL HILL, NC 27515-0185
PO BOX 10186, CHAPEL HILL, NC 27515-0186
PO BOX 10187, CHAPEL HILL, NC 27515-0187
PO BOX 10188, CHAPEL HILL, NC 27515-0188
PO BOX 10189, CHAPEL HILL, NC 27515-0189
PO BOX 10190, CHAPEL HILL, NC 27515-0190
PO BOX 10191, CHAPEL HILL, NC 27515-0191
PO BOX 10192, CHAPEL HILL, NC 27515-0192
PO BOX 10193, CHAPEL HILL, NC 27515-0193
PO BOX 10194, CHAPEL HILL, NC 27515-0194
PO BOX 10195, CHAPEL HILL, NC 27515-0195
PO BOX 10196, CHAPEL HILL, NC 27515-0196
PO BOX 10197, CHAPEL HILL, NC 27515-0197
PO BOX 10198, CHAPEL HILL, NC 27515-0198
PO BOX 10199, CHAPEL HILL, NC 27515-0199
PO BOX 10200, CHAPEL HILL, NC 27515-0200
PO BOX 10201, CHAPEL HILL, NC 27515-0201
PO BOX 10202, CHAPEL HILL, NC 27515-0202
PO BOX 10203, CHAPEL HILL, NC 27515-0203
PO BOX 10204, CHAPEL HILL, NC 27515-0204
PO BOX 10205, CHAPEL HILL, NC 27515-0205
PO BOX 10206, CHAPEL HILL, NC 27515-0206
PO BOX 10207, CHAPEL HILL, NC 27515-0207
PO BOX 10208, CHAPEL HILL, NC 27515-0208
PO BOX 10209, CHAPEL HILL, NC 27515-0209
PO BOX 10210, CHAPEL HILL, NC 27515-0210
PO BOX 10211, CHAPEL HILL, NC 27515-0211
PO BOX 10212, CHAPEL HILL, NC 27515-0212
PO BOX 10213, CHAPEL HILL, NC 27515-0213
PO BOX 10214, CHAPEL HILL, NC 27515-0214
PO BOX 10215, CHAPEL HILL, NC 27515-0215
PO BOX 10216, CHAPEL HILL, NC 27515-0216
PO BOX 10217, CHAPEL HILL, NC 27515-0217
PO BOX 10218, CHAPEL HILL, NC 27515-0218
PO BOX 10219, CHAPEL HILL, NC 27515-0219
PO BOX 10220, CHAPEL HILL, NC 27515-0220
PO BOX 10221, CHAPEL HILL, NC 27515-0221
PO BOX 10222, CHAPEL HILL, NC 27515-0222
PO BOX 10223, CHAPEL HILL, NC 27515-0223
PO BOX 10224, CHAPEL HILL, NC 27515-0224
PO BOX 10225, CHAPEL HILL, NC 27515-0225
PO BOX 10226, CHAPEL HILL, NC 27515-0226
PO BOX 10227, CHAPEL HILL, NC 27515-0227
PO BOX 10228, CHAPEL HILL, NC 27515-0228
PO BOX 10229, CHAPEL HILL, NC 27515-0229
PO BOX 10230, CHAPEL HILL, NC 27515-0230
PO BOX 10231, CHAPEL HILL, NC 27515-0231
PO BOX 10232, CHAPEL HILL, NC 27515-0232
PO BOX 10233, CHAPEL HILL, NC 27515-0233
PO BOX 10234, CHAPEL HILL, NC 27515-0234
PO BOX 10235, CHAPEL HILL, NC 27515-0235
PO BOX 10236, CHAPEL HILL, NC 27515-0236
PO BOX 10237, CHAPEL HILL, NC 27515-0237
PO BOX 10238, CHAPEL HILL, NC 27515-0238
PO BOX 10239, CHAPEL HILL, NC 27515-0239
PO BOX 10240, CHAPEL HILL, NC 27515-0240
PO BOX 10241, CHAPEL HILL, NC 27515-0241
PO BOX 10242, CHAPEL HILL, NC 27515-0242
PO BOX 10243, CHAPEL HILL, NC 27515-0243
PO BOX 10244, CHAPEL HILL, NC 27515-0244
PO BOX 10245, CHAPEL HILL, NC 27515-0245
PO BOX 10246, CHAPEL HILL, NC 27515-0246
PO BOX 10247, CHAPEL HILL, NC 27515-0247
PO BOX 10248, CHAPEL HILL, NC 27515-0248
PO BOX 10249, CHAPEL HILL, NC 27515-0249
PO BOX 10250, CHAPEL HILL, NC 27515-0250
PO BOX 10251, CHAPEL HILL, NC 27515-0251
PO BOX 10252, CHAPEL HILL, NC 27515-0252
PO BOX 10253, CHAPEL HILL, NC 27515-0253
PO BOX 10254, CHAPEL HILL, NC 27515-0254
PO BOX 10255, CHAPEL HILL, NC 27515-0255
PO BOX 10256, CHAPEL HILL, NC 27515-0256
PO BOX 10257, CHAPEL HILL, NC 27515-0257
PO BOX 10258, CHAPEL HILL, NC 27515-0258
PO BOX 10259, CHAPEL HILL, NC 27515-0259
PO BOX 10260, CHAPEL HILL, NC 27515-0260
PO BOX 10261, CHAPEL HILL, NC 27515-0261
PO BOX 10262, CHAPEL HILL, NC 27515-0262
PO BOX 10263, CHAPEL HILL, NC 27515-0263
PO BOX 10264, CHAPEL HILL, NC 27515-0264
PO BOX 10265, CHAPEL HILL, NC 27515-0265
PO BOX 10266, CHAPEL HILL, NC 27515-0266
PO BOX 10267, CHAPEL HILL, NC 27515-0267
PO BOX 10268, CHAPEL HILL, NC 27515-0268
PO BOX 10269, CHAPEL HILL, NC 27515-0269
PO BOX 10270, CHAPEL HILL, NC 27515-0270
PO BOX 10271, CHAPEL HILL, NC 27515-0271
PO BOX 10272, CHAPEL HILL, NC 27515-0272
PO BOX 10273, CHAPEL HILL, NC 27515-0273
PO BOX 10274, CHAPEL HILL, NC 27515-0274
PO BOX 10275, CHAPEL HILL, NC 27515-0275
PO BOX 10276, CHAPEL HILL, NC 27515-0276
PO BOX 10277, CHAPEL HILL, NC 27515-0277
PO BOX 10278, CHAPEL HILL, NC 27515-0278
PO BOX 10279, CHAPEL HILL, NC 27515-0279
PO BOX 10280, CHAPEL HILL, NC 27515-0280
PO BOX 10281, CHAPEL HILL, NC 27515-0281
PO BOX 10282, CHAPEL HILL, NC 27515-0282
PO BOX 10283, CHAPEL HILL, NC 27515-0283
PO BOX 10284, CHAPEL HILL, NC 27515-0284
PO BOX 10285, CHAPEL HILL, NC 27515-0285
PO BOX 10286, CHAPEL HILL, NC 27515-0286
PO BOX 10287, CHAPEL HILL, NC 27515-0287
PO BOX 10288, CHAPEL HILL, NC 27515-0288
PO BOX 10289, CHAPEL HILL, NC 27515-0289
PO BOX 10290, CHAPEL HILL, NC 27515-0290
PO BOX 10291, CHAPEL HILL, NC 27515-0291
PO BOX 10292, CHAPEL HILL, NC 27515-0292
PO BOX 10293, CHAPEL HILL, NC 27515-0293
PO BOX 10294, CHAPEL HILL, NC 27515-0294
PO BOX 10295, CHAPEL HILL, NC 27515-0295
PO BOX 10296, CHAPEL HILL, NC 27515-0296
PO BOX 10297, CHAPEL HILL, NC 27515-0297
PO BOX 10298, CHAPEL HILL, NC 27515-0298
PO BOX 10299, CHAPEL HILL, NC 27515-0299
PO BOX 10300, CHAPEL HILL, NC 27515-0300
PO BOX 10301, CHAPEL HILL, NC 27515-0301
PO BOX 10302, CHAPEL HILL, NC 27515-0302
PO BOX 10303, CHAPEL HILL, NC 27515-0303
PO BOX 10304, CHAPEL HILL, NC 27515-0304
PO BOX 10305, CHAPEL HILL, NC 27515-0305
PO BOX 10306, CHAPEL HILL, NC 27515-0306
PO BOX 10307, CHAPEL HILL, NC 27515-0307
PO BOX 10308, CHAPEL HILL, NC 27515-0308
PO BOX 10309, CHAPEL HILL, NC 27515-0309
PO BOX 10310, CHAPEL HILL, NC 27515-0310
PO BOX 10311, CHAPEL HILL, NC 27515-0311
PO BOX 10312, CHAPEL HILL, NC 27515-0312
PO BOX 10313, CHAPEL HILL, NC 27515-0313
PO BOX 10314, CHAPEL HILL, NC 27515-0314
PO BOX 10315, CHAPEL HILL, NC 27515-0315
PO BOX 10316, CHAPEL HILL, NC 27515-0316
PO BOX 10317, CHAPEL HILL, NC 27515-0317
PO BOX 10318, CHAPEL HILL, NC 27515-0318
PO BOX 10319, CHAPEL HILL, NC 27515-0319
PO BOX 10320, CHAPEL HILL, NC 27515-0320
PO BOX 10321, CHAPEL HILL, NC 27515-0321
PO BOX 10322, CHAPEL HILL, NC 27515-0322
PO BOX 10323, CHAPEL HILL, NC 27515-0323
PO BOX 10324, CHAPEL HILL, NC 27515-0324
PO BOX 10325, CHAPEL HILL, NC 27515-0325
PO BOX 10326, CHAPEL HILL, NC 27515-0326
PO BOX 10327, CHAPEL HILL, NC 27515-0327
PO BOX 10328, CHAPEL HILL, NC 27515-0328
PO BOX 10329, CHAPEL HILL, NC 27515-0329
PO BOX 10330, CHAPEL HILL, NC 27515-0330
PO BOX 10331, CHAPEL HILL, NC 27515-0331
PO BOX 10332, CHAPEL HILL, NC 27515-0332
PO BOX 10333, CHAPEL HILL, NC 27515-0333
PO BOX 10334, CHAPEL HILL, NC 27515-0334
PO BOX 10335, CHAPEL HILL, NC 27515-0335
PO BOX 10336, CHAPEL HILL, NC 27515-0336
PO BOX 10337, CHAPEL HILL, NC 27515-0337
PO BOX 10338, CHAPEL HILL, NC 27515-0338
PO BOX 10339, CHAPEL HILL, NC 27515-0339
PO BOX 10340, CHAPEL HILL, NC 27515-0340
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