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 161, MOUNT HOLLY, NC 28120-0161
PO BOX 162, MOUNT HOLLY, NC 28120-0162
PO BOX 163, MOUNT HOLLY, NC 28120-0163
PO BOX 164, MOUNT HOLLY, NC 28120-0164
PO BOX 165, MOUNT HOLLY, NC 28120-0165
PO BOX 166, MOUNT HOLLY, NC 28120-0166
PO BOX 167, MOUNT HOLLY, NC 28120-0167
PO BOX 168, MOUNT HOLLY, NC 28120-0168
PO BOX 169, MOUNT HOLLY, NC 28120-0169
PO BOX 170, MOUNT HOLLY, NC 28120-0170
PO BOX 171, MOUNT HOLLY, NC 28120-0171
PO BOX 172, MOUNT HOLLY, NC 28120-0172
PO BOX 173, MOUNT HOLLY, NC 28120-0173
PO BOX 174, MOUNT HOLLY, NC 28120-0174
PO BOX 175, MOUNT HOLLY, NC 28120-0175
PO BOX 176, MOUNT HOLLY, NC 28120-0176
PO BOX 177, MOUNT HOLLY, NC 28120-0177
PO BOX 178, MOUNT HOLLY, NC 28120-0178
PO BOX 179, MOUNT HOLLY, NC 28120-0179
PO BOX 180, MOUNT HOLLY, NC 28120-0180
PO BOX 181, MOUNT HOLLY, NC 28120-0181
PO BOX 182, MOUNT HOLLY, NC 28120-0182
PO BOX 183, MOUNT HOLLY, NC 28120-0183
PO BOX 184, MOUNT HOLLY, NC 28120-0184
PO BOX 185, MOUNT HOLLY, NC 28120-0185
PO BOX 186, MOUNT HOLLY, NC 28120-0186
PO BOX 187, MOUNT HOLLY, NC 28120-0187
PO BOX 188, MOUNT HOLLY, NC 28120-0188
PO BOX 189, MOUNT HOLLY, NC 28120-0189
PO BOX 190, MOUNT HOLLY, NC 28120-0190
PO BOX 191, MOUNT HOLLY, NC 28120-0191
PO BOX 192, MOUNT HOLLY, NC 28120-0192
PO BOX 193, MOUNT HOLLY, NC 28120-0193
PO BOX 194, MOUNT HOLLY, NC 28120-0194
PO BOX 195, MOUNT HOLLY, NC 28120-0195
PO BOX 196, MOUNT HOLLY, NC 28120-0196
PO BOX 197, MOUNT HOLLY, NC 28120-0197
PO BOX 198, MOUNT HOLLY, NC 28120-0198
PO BOX 199, MOUNT HOLLY, NC 28120-0199
PO BOX 200, MOUNT HOLLY, NC 28120-0200
PO BOX 201, MOUNT HOLLY, NC 28120-0201
PO BOX 202, MOUNT HOLLY, NC 28120-0202
PO BOX 203, MOUNT HOLLY, NC 28120-0203
PO BOX 204, MOUNT HOLLY, NC 28120-0204
PO BOX 205, MOUNT HOLLY, NC 28120-0205
PO BOX 206, MOUNT HOLLY, NC 28120-0206
PO BOX 207, MOUNT HOLLY, NC 28120-0207
PO BOX 208, MOUNT HOLLY, NC 28120-0208
PO BOX 209, MOUNT HOLLY, NC 28120-0209
PO BOX 210, MOUNT HOLLY, NC 28120-0210
PO BOX 211, MOUNT HOLLY, NC 28120-0211
PO BOX 212, MOUNT HOLLY, NC 28120-0212
PO BOX 213, MOUNT HOLLY, NC 28120-0213
PO BOX 214, MOUNT HOLLY, NC 28120-0214
PO BOX 215, MOUNT HOLLY, NC 28120-0215
PO BOX 216, MOUNT HOLLY, NC 28120-0216
PO BOX 217, MOUNT HOLLY, NC 28120-0217
PO BOX 218, MOUNT HOLLY, NC 28120-0218
PO BOX 219, MOUNT HOLLY, NC 28120-0219
PO BOX 220, MOUNT HOLLY, NC 28120-0220
PO BOX 221, MOUNT HOLLY, NC 28120-0221
PO BOX 222, MOUNT HOLLY, NC 28120-0222
PO BOX 223, MOUNT HOLLY, NC 28120-0223
PO BOX 224, MOUNT HOLLY, NC 28120-0224
PO BOX 225, MOUNT HOLLY, NC 28120-0225
PO BOX 226, MOUNT HOLLY, NC 28120-0226
PO BOX 227, MOUNT HOLLY, NC 28120-0227
PO BOX 228, MOUNT HOLLY, NC 28120-0228
PO BOX 229, MOUNT HOLLY, NC 28120-0229
PO BOX 230, MOUNT HOLLY, NC 28120-0230
PO BOX 231, MOUNT HOLLY, NC 28120-0231
PO BOX 232, MOUNT HOLLY, NC 28120-0232
PO BOX 233, MOUNT HOLLY, NC 28120-0233
PO BOX 234, MOUNT HOLLY, NC 28120-0234
PO BOX 235, MOUNT HOLLY, NC 28120-0235
PO BOX 236, MOUNT HOLLY, NC 28120-0236
PO BOX 237, MOUNT HOLLY, NC 28120-0237
PO BOX 238, MOUNT HOLLY, NC 28120-0238
PO BOX 239, MOUNT HOLLY, NC 28120-0239
PO BOX 240, MOUNT HOLLY, NC 28120-0240
PO BOX 241, MOUNT HOLLY, NC 28120-0241
PO BOX 242, MOUNT HOLLY, NC 28120-0242
PO BOX 243, MOUNT HOLLY, NC 28120-0243
PO BOX 244, MOUNT HOLLY, NC 28120-0244
PO BOX 245, MOUNT HOLLY, NC 28120-0245
PO BOX 246, MOUNT HOLLY, NC 28120-0246
PO BOX 247, MOUNT HOLLY, NC 28120-0247
PO BOX 248, MOUNT HOLLY, NC 28120-0248
PO BOX 249, MOUNT HOLLY, NC 28120-0249
PO BOX 250, MOUNT HOLLY, NC 28120-0250
PO BOX 251, MOUNT HOLLY, NC 28120-0251
PO BOX 252, MOUNT HOLLY, NC 28120-0252
PO BOX 253, MOUNT HOLLY, NC 28120-0253
PO BOX 254, MOUNT HOLLY, NC 28120-0254
PO BOX 255, MOUNT HOLLY, NC 28120-0255
PO BOX 256, MOUNT HOLLY, NC 28120-0256
PO BOX 257, MOUNT HOLLY, NC 28120-0257
PO BOX 258, MOUNT HOLLY, NC 28120-0258
PO BOX 259, MOUNT HOLLY, NC 28120-0259
PO BOX 260, MOUNT HOLLY, NC 28120-0260
PO BOX 261, MOUNT HOLLY, NC 28120-0261
PO BOX 262, MOUNT HOLLY, NC 28120-0262
PO BOX 263, MOUNT HOLLY, NC 28120-0263
PO BOX 264, MOUNT HOLLY, NC 28120-0264
PO BOX 265, MOUNT HOLLY, NC 28120-0265
PO BOX 266, MOUNT HOLLY, NC 28120-0266
PO BOX 267, MOUNT HOLLY, NC 28120-0267
PO BOX 268, MOUNT HOLLY, NC 28120-0268
PO BOX 269, MOUNT HOLLY, NC 28120-0269
PO BOX 270, MOUNT HOLLY, NC 28120-0270
PO BOX 271, MOUNT HOLLY, NC 28120-0271
PO BOX 272, MOUNT HOLLY, NC 28120-0272
PO BOX 273, MOUNT HOLLY, NC 28120-0273
PO BOX 274, MOUNT HOLLY, NC 28120-0274
PO BOX 275, MOUNT HOLLY, NC 28120-0275
PO BOX 276, MOUNT HOLLY, NC 28120-0276
PO BOX 277, MOUNT HOLLY, NC 28120-0277
PO BOX 278, MOUNT HOLLY, NC 28120-0278
PO BOX 279, MOUNT HOLLY, NC 28120-0279
PO BOX 280, MOUNT HOLLY, NC 28120-0280
PO BOX 281, MOUNT HOLLY, NC 28120-0281
PO BOX 282, MOUNT HOLLY, NC 28120-0282
PO BOX 283, MOUNT HOLLY, NC 28120-0283
PO BOX 284, MOUNT HOLLY, NC 28120-0284
PO BOX 285, MOUNT HOLLY, NC 28120-0285
PO BOX 286, MOUNT HOLLY, NC 28120-0286
PO BOX 287, MOUNT HOLLY, NC 28120-0287
PO BOX 288, MOUNT HOLLY, NC 28120-0288
PO BOX 289, MOUNT HOLLY, NC 28120-0289
PO BOX 290, MOUNT HOLLY, NC 28120-0290
PO BOX 291, MOUNT HOLLY, NC 28120-0291
PO BOX 292, MOUNT HOLLY, NC 28120-0292
PO BOX 293, MOUNT HOLLY, NC 28120-0293
PO BOX 294, MOUNT HOLLY, NC 28120-0294
PO BOX 295, MOUNT HOLLY, NC 28120-0295
PO BOX 296, MOUNT HOLLY, NC 28120-0296
PO BOX 297, MOUNT HOLLY, NC 28120-0297
PO BOX 298, MOUNT HOLLY, NC 28120-0298
PO BOX 299, MOUNT HOLLY, NC 28120-0299
PO BOX 300, MOUNT HOLLY, NC 28120-0300
PO BOX 301, MOUNT HOLLY, NC 28120-0301
PO BOX 302, MOUNT HOLLY, NC 28120-0302
PO BOX 303, MOUNT HOLLY, NC 28120-0303
PO BOX 304, MOUNT HOLLY, NC 28120-0304
PO BOX 305, MOUNT HOLLY, NC 28120-0305
PO BOX 306, MOUNT HOLLY, NC 28120-0306
PO BOX 307, MOUNT HOLLY, NC 28120-0307
PO BOX 308, MOUNT HOLLY, NC 28120-0308
PO BOX 309, MOUNT HOLLY, NC 28120-0309
PO BOX 310, MOUNT HOLLY, NC 28120-0310
PO BOX 311, MOUNT HOLLY, NC 28120-0311
PO BOX 312, MOUNT HOLLY, NC 28120-0312
PO BOX 313, MOUNT HOLLY, NC 28120-0313
PO BOX 314, MOUNT HOLLY, NC 28120-0314
PO BOX 315, MOUNT HOLLY, NC 28120-0315
PO BOX 316, MOUNT HOLLY, NC 28120-0316
PO BOX 317, MOUNT HOLLY, NC 28120-0317
PO BOX 318, MOUNT HOLLY, NC 28120-0318
PO BOX 319, MOUNT HOLLY, NC 28120-0319
PO BOX 320, MOUNT HOLLY, NC 28120-0320
PO BOX 321, MOUNT HOLLY, NC 28120-0321
PO BOX 322, MOUNT HOLLY, NC 28120-0322
PO BOX 323, MOUNT HOLLY, NC 28120-0323
PO BOX 324, MOUNT HOLLY, NC 28120-0324
PO BOX 325, MOUNT HOLLY, NC 28120-0325
PO BOX 326, MOUNT HOLLY, NC 28120-0326
PO BOX 327, MOUNT HOLLY, NC 28120-0327
PO BOX 328, MOUNT HOLLY, NC 28120-0328
PO BOX 329, MOUNT HOLLY, NC 28120-0329
PO BOX 330, MOUNT HOLLY, NC 28120-0330
PO BOX 331, MOUNT HOLLY, NC 28120-0331
PO BOX 332, MOUNT HOLLY, NC 28120-0332
PO BOX 333, MOUNT HOLLY, NC 28120-0333
PO BOX 334, MOUNT HOLLY, NC 28120-0334
PO BOX 335, MOUNT HOLLY, NC 28120-0335
PO BOX 336, MOUNT HOLLY, NC 28120-0336
PO BOX 337, MOUNT HOLLY, NC 28120-0337
PO BOX 338, MOUNT HOLLY, NC 28120-0338
PO BOX 339, MOUNT HOLLY, NC 28120-0339
PO BOX 340, MOUNT HOLLY, NC 28120-0340
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