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 181, ROCKINGHAM, NC 28380-0181
PO BOX 182, ROCKINGHAM, NC 28380-0182
PO BOX 183, ROCKINGHAM, NC 28380-0183
PO BOX 184, ROCKINGHAM, NC 28380-0184
PO BOX 185, ROCKINGHAM, NC 28380-0185
PO BOX 186, ROCKINGHAM, NC 28380-0186
PO BOX 187, ROCKINGHAM, NC 28380-0187
PO BOX 188, ROCKINGHAM, NC 28380-0188
PO BOX 189, ROCKINGHAM, NC 28380-0189
PO BOX 190, ROCKINGHAM, NC 28380-0190
PO BOX 191, ROCKINGHAM, NC 28380-0191
PO BOX 192, ROCKINGHAM, NC 28380-0192
PO BOX 193, ROCKINGHAM, NC 28380-0193
PO BOX 194, ROCKINGHAM, NC 28380-0194
PO BOX 195, ROCKINGHAM, NC 28380-0195
PO BOX 196, ROCKINGHAM, NC 28380-0196
PO BOX 197, ROCKINGHAM, NC 28380-0197
PO BOX 198, ROCKINGHAM, NC 28380-0198
PO BOX 199, ROCKINGHAM, NC 28380-0199
PO BOX 200, ROCKINGHAM, NC 28380-0200
PO BOX 201, ROCKINGHAM, NC 28380-0201
PO BOX 202, ROCKINGHAM, NC 28380-0202
PO BOX 203, ROCKINGHAM, NC 28380-0203
PO BOX 204, ROCKINGHAM, NC 28380-0204
PO BOX 205, ROCKINGHAM, NC 28380-0205
PO BOX 206, ROCKINGHAM, NC 28380-0206
PO BOX 207, ROCKINGHAM, NC 28380-0207
PO BOX 208, ROCKINGHAM, NC 28380-0208
PO BOX 209, ROCKINGHAM, NC 28380-0209
PO BOX 210, ROCKINGHAM, NC 28380-0210
PO BOX 211, ROCKINGHAM, NC 28380-0211
PO BOX 212, ROCKINGHAM, NC 28380-0212
PO BOX 213, ROCKINGHAM, NC 28380-0213
PO BOX 214, ROCKINGHAM, NC 28380-0214
PO BOX 215, ROCKINGHAM, NC 28380-0215
PO BOX 216, ROCKINGHAM, NC 28380-0216
PO BOX 217, ROCKINGHAM, NC 28380-0217
PO BOX 218, ROCKINGHAM, NC 28380-0218
PO BOX 219, ROCKINGHAM, NC 28380-0219
PO BOX 220, ROCKINGHAM, NC 28380-0220
PO BOX 221, ROCKINGHAM, NC 28380-0221
PO BOX 222, ROCKINGHAM, NC 28380-0222
PO BOX 223, ROCKINGHAM, NC 28380-0223
PO BOX 224, ROCKINGHAM, NC 28380-0224
PO BOX 225, ROCKINGHAM, NC 28380-0225
PO BOX 226, ROCKINGHAM, NC 28380-0226
PO BOX 227, ROCKINGHAM, NC 28380-0227
PO BOX 228, ROCKINGHAM, NC 28380-0228
PO BOX 229, ROCKINGHAM, NC 28380-0229
PO BOX 230, ROCKINGHAM, NC 28380-0230
PO BOX 231, ROCKINGHAM, NC 28380-0231
PO BOX 232, ROCKINGHAM, NC 28380-0232
PO BOX 233, ROCKINGHAM, NC 28380-0233
PO BOX 234, ROCKINGHAM, NC 28380-0234
PO BOX 235, ROCKINGHAM, NC 28380-0235
PO BOX 236, ROCKINGHAM, NC 28380-0236
PO BOX 237, ROCKINGHAM, NC 28380-0237
PO BOX 238, ROCKINGHAM, NC 28380-0238
PO BOX 239, ROCKINGHAM, NC 28380-0239
PO BOX 240, ROCKINGHAM, NC 28380-0240
PO BOX 241, ROCKINGHAM, NC 28380-0241
PO BOX 242, ROCKINGHAM, NC 28380-0242
PO BOX 243, ROCKINGHAM, NC 28380-0243
PO BOX 244, ROCKINGHAM, NC 28380-0244
PO BOX 245, ROCKINGHAM, NC 28380-0245
PO BOX 246, ROCKINGHAM, NC 28380-0246
PO BOX 247, ROCKINGHAM, NC 28380-0247
PO BOX 248, ROCKINGHAM, NC 28380-0248
PO BOX 249, ROCKINGHAM, NC 28380-0249
PO BOX 250, ROCKINGHAM, NC 28380-0250
PO BOX 251, ROCKINGHAM, NC 28380-0251
PO BOX 252, ROCKINGHAM, NC 28380-0252
PO BOX 253, ROCKINGHAM, NC 28380-0253
PO BOX 254, ROCKINGHAM, NC 28380-0254
PO BOX 255, ROCKINGHAM, NC 28380-0255
PO BOX 256, ROCKINGHAM, NC 28380-0256
PO BOX 257, ROCKINGHAM, NC 28380-0257
PO BOX 258, ROCKINGHAM, NC 28380-0258
PO BOX 259, ROCKINGHAM, NC 28380-0259
PO BOX 260, ROCKINGHAM, NC 28380-0260
PO BOX 261, ROCKINGHAM, NC 28380-0261
PO BOX 262, ROCKINGHAM, NC 28380-0262
PO BOX 263, ROCKINGHAM, NC 28380-0263
PO BOX 264, ROCKINGHAM, NC 28380-0264
PO BOX 265, ROCKINGHAM, NC 28380-0265
PO BOX 266, ROCKINGHAM, NC 28380-0266
PO BOX 267, ROCKINGHAM, NC 28380-0267
PO BOX 268, ROCKINGHAM, NC 28380-0268
PO BOX 269, ROCKINGHAM, NC 28380-0269
PO BOX 270, ROCKINGHAM, NC 28380-0270
PO BOX 271, ROCKINGHAM, NC 28380-0271
PO BOX 272, ROCKINGHAM, NC 28380-0272
PO BOX 273, ROCKINGHAM, NC 28380-0273
PO BOX 274, ROCKINGHAM, NC 28380-0274
PO BOX 275, ROCKINGHAM, NC 28380-0275
PO BOX 276, ROCKINGHAM, NC 28380-0276
PO BOX 277, ROCKINGHAM, NC 28380-0277
PO BOX 278, ROCKINGHAM, NC 28380-0278
PO BOX 279, ROCKINGHAM, NC 28380-0279
PO BOX 280, ROCKINGHAM, NC 28380-0280
PO BOX 281, ROCKINGHAM, NC 28380-0281
PO BOX 282, ROCKINGHAM, NC 28380-0282
PO BOX 283, ROCKINGHAM, NC 28380-0283
PO BOX 284, ROCKINGHAM, NC 28380-0284
PO BOX 285, ROCKINGHAM, NC 28380-0285
PO BOX 286, ROCKINGHAM, NC 28380-0286
PO BOX 287, ROCKINGHAM, NC 28380-0287
PO BOX 288, ROCKINGHAM, NC 28380-0288
PO BOX 289, ROCKINGHAM, NC 28380-0289
PO BOX 290, ROCKINGHAM, NC 28380-0290
PO BOX 291, ROCKINGHAM, NC 28380-0291
PO BOX 292, ROCKINGHAM, NC 28380-0292
PO BOX 293, ROCKINGHAM, NC 28380-0293
PO BOX 294, ROCKINGHAM, NC 28380-0294
PO BOX 295, ROCKINGHAM, NC 28380-0295
PO BOX 296, ROCKINGHAM, NC 28380-0296
PO BOX 297, ROCKINGHAM, NC 28380-0297
PO BOX 298, ROCKINGHAM, NC 28380-0298
PO BOX 299, ROCKINGHAM, NC 28380-0299
PO BOX 300, ROCKINGHAM, NC 28380-0300
PO BOX 301, ROCKINGHAM, NC 28380-0301
PO BOX 302, ROCKINGHAM, NC 28380-0302
PO BOX 303, ROCKINGHAM, NC 28380-0303
PO BOX 304, ROCKINGHAM, NC 28380-0304
PO BOX 305, ROCKINGHAM, NC 28380-0305
PO BOX 306, ROCKINGHAM, NC 28380-0306
PO BOX 307, ROCKINGHAM, NC 28380-0307
PO BOX 308, ROCKINGHAM, NC 28380-0308
PO BOX 309, ROCKINGHAM, NC 28380-0309
PO BOX 310, ROCKINGHAM, NC 28380-0310
PO BOX 311, ROCKINGHAM, NC 28380-0311
PO BOX 312, ROCKINGHAM, NC 28380-0312
PO BOX 313, ROCKINGHAM, NC 28380-0313
PO BOX 314, ROCKINGHAM, NC 28380-0314
PO BOX 315, ROCKINGHAM, NC 28380-0315
PO BOX 316, ROCKINGHAM, NC 28380-0316
PO BOX 317, ROCKINGHAM, NC 28380-0317
PO BOX 318, ROCKINGHAM, NC 28380-0318
PO BOX 319, ROCKINGHAM, NC 28380-0319
PO BOX 320, ROCKINGHAM, NC 28380-0320
PO BOX 321, ROCKINGHAM, NC 28380-0321
PO BOX 322, ROCKINGHAM, NC 28380-0322
PO BOX 323, ROCKINGHAM, NC 28380-0323
PO BOX 324, ROCKINGHAM, NC 28380-0324
PO BOX 325, ROCKINGHAM, NC 28380-0325
PO BOX 326, ROCKINGHAM, NC 28380-0326
PO BOX 327, ROCKINGHAM, NC 28380-0327
PO BOX 328, ROCKINGHAM, NC 28380-0328
PO BOX 329, ROCKINGHAM, NC 28380-0329
PO BOX 330, ROCKINGHAM, NC 28380-0330
PO BOX 331, ROCKINGHAM, NC 28380-0331
PO BOX 332, ROCKINGHAM, NC 28380-0332
PO BOX 333, ROCKINGHAM, NC 28380-0333
PO BOX 334, ROCKINGHAM, NC 28380-0334
PO BOX 335, ROCKINGHAM, NC 28380-0335
PO BOX 336, ROCKINGHAM, NC 28380-0336
PO BOX 337, ROCKINGHAM, NC 28380-0337
PO BOX 338, ROCKINGHAM, NC 28380-0338
PO BOX 339, ROCKINGHAM, NC 28380-0339
PO BOX 340, ROCKINGHAM, NC 28380-0340
PO BOX 341, ROCKINGHAM, NC 28380-0341
PO BOX 342, ROCKINGHAM, NC 28380-0342
PO BOX 343, ROCKINGHAM, NC 28380-0343
PO BOX 344, ROCKINGHAM, NC 28380-0344
PO BOX 345, ROCKINGHAM, NC 28380-0345
PO BOX 346, ROCKINGHAM, NC 28380-0346
PO BOX 347, ROCKINGHAM, NC 28380-0347
PO BOX 348, ROCKINGHAM, NC 28380-0348
PO BOX 349, ROCKINGHAM, NC 28380-0349
PO BOX 350, ROCKINGHAM, NC 28380-0350
PO BOX 351, ROCKINGHAM, NC 28380-0351
PO BOX 352, ROCKINGHAM, NC 28380-0352
PO BOX 353, ROCKINGHAM, NC 28380-0353
PO BOX 354, ROCKINGHAM, NC 28380-0354
PO BOX 355, ROCKINGHAM, NC 28380-0355
PO BOX 356, ROCKINGHAM, NC 28380-0356
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