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, WILMINGTON, NC 28402-0181
PO BOX 182, WILMINGTON, NC 28402-0182
PO BOX 183, WILMINGTON, NC 28402-0183
PO BOX 184, WILMINGTON, NC 28402-0184
PO BOX 185, WILMINGTON, NC 28402-0185
PO BOX 186, WILMINGTON, NC 28402-0186
PO BOX 187, WILMINGTON, NC 28402-0187
PO BOX 188, WILMINGTON, NC 28402-0188
PO BOX 189, WILMINGTON, NC 28402-0189
PO BOX 190, WILMINGTON, NC 28402-0190
PO BOX 191, WILMINGTON, NC 28402-0191
PO BOX 192, WILMINGTON, NC 28402-0192
PO BOX 193, WILMINGTON, NC 28402-0193
PO BOX 194, WILMINGTON, NC 28402-0194
PO BOX 195, WILMINGTON, NC 28402-0195
PO BOX 196, WILMINGTON, NC 28402-0196
PO BOX 197, WILMINGTON, NC 28402-0197
PO BOX 198, WILMINGTON, NC 28402-0198
PO BOX 199, WILMINGTON, NC 28402-0199
PO BOX 200, WILMINGTON, NC 28402-0200
PO BOX 201, WILMINGTON, NC 28402-0201
PO BOX 202, WILMINGTON, NC 28402-0202
PO BOX 203, WILMINGTON, NC 28402-0203
PO BOX 204, WILMINGTON, NC 28402-0204
PO BOX 205, WILMINGTON, NC 28402-0205
PO BOX 206, WILMINGTON, NC 28402-0206
PO BOX 207, WILMINGTON, NC 28402-0207
PO BOX 208, WILMINGTON, NC 28402-0208
PO BOX 209, WILMINGTON, NC 28402-0209
PO BOX 210, WILMINGTON, NC 28402-0210
PO BOX 211, WILMINGTON, NC 28402-0211
PO BOX 212, WILMINGTON, NC 28402-0212
PO BOX 213, WILMINGTON, NC 28402-0213
PO BOX 214, WILMINGTON, NC 28402-0214
PO BOX 215, WILMINGTON, NC 28402-0215
PO BOX 216, WILMINGTON, NC 28402-0216
PO BOX 217, WILMINGTON, NC 28402-0217
PO BOX 218, WILMINGTON, NC 28402-0218
PO BOX 219, WILMINGTON, NC 28402-0219
PO BOX 220, WILMINGTON, NC 28402-0220
PO BOX 221, WILMINGTON, NC 28402-0221
PO BOX 222, WILMINGTON, NC 28402-0222
PO BOX 223, WILMINGTON, NC 28402-0223
PO BOX 224, WILMINGTON, NC 28402-0224
PO BOX 225, WILMINGTON, NC 28402-0225
PO BOX 226, WILMINGTON, NC 28402-0226
PO BOX 227, WILMINGTON, NC 28402-0227
PO BOX 228, WILMINGTON, NC 28402-0228
PO BOX 229, WILMINGTON, NC 28402-0229
PO BOX 230, WILMINGTON, NC 28402-0230
PO BOX 231, WILMINGTON, NC 28402-0231
PO BOX 232, WILMINGTON, NC 28402-0232
PO BOX 233, WILMINGTON, NC 28402-0233
PO BOX 234, WILMINGTON, NC 28402-0234
PO BOX 235, WILMINGTON, NC 28402-0235
PO BOX 236, WILMINGTON, NC 28402-0236
PO BOX 237, WILMINGTON, NC 28402-0237
PO BOX 238, WILMINGTON, NC 28402-0238
PO BOX 239, WILMINGTON, NC 28402-0239
PO BOX 240, WILMINGTON, NC 28402-0240
PO BOX 241, WILMINGTON, NC 28402-0241
PO BOX 242, WILMINGTON, NC 28402-0242
PO BOX 243, WILMINGTON, NC 28402-0243
PO BOX 244, WILMINGTON, NC 28402-0244
PO BOX 245, WILMINGTON, NC 28402-0245
PO BOX 246, WILMINGTON, NC 28402-0246
PO BOX 247, WILMINGTON, NC 28402-0247
PO BOX 248, WILMINGTON, NC 28402-0248
PO BOX 249, WILMINGTON, NC 28402-0249
PO BOX 250, WILMINGTON, NC 28402-0250
PO BOX 251, WILMINGTON, NC 28402-0251
PO BOX 252, WILMINGTON, NC 28402-0252
PO BOX 253, WILMINGTON, NC 28402-0253
PO BOX 254, WILMINGTON, NC 28402-0254
PO BOX 255, WILMINGTON, NC 28402-0255
PO BOX 256, WILMINGTON, NC 28402-0256
PO BOX 257, WILMINGTON, NC 28402-0257
PO BOX 258, WILMINGTON, NC 28402-0258
PO BOX 259, WILMINGTON, NC 28402-0259
PO BOX 260, WILMINGTON, NC 28402-0260
PO BOX 261, WILMINGTON, NC 28402-0261
PO BOX 262, WILMINGTON, NC 28402-0262
PO BOX 263, WILMINGTON, NC 28402-0263
PO BOX 264, WILMINGTON, NC 28402-0264
PO BOX 265, WILMINGTON, NC 28402-0265
PO BOX 266, WILMINGTON, NC 28402-0266
PO BOX 267, WILMINGTON, NC 28402-0267
PO BOX 268, WILMINGTON, NC 28402-0268
PO BOX 269, WILMINGTON, NC 28402-0269
PO BOX 270, WILMINGTON, NC 28402-0270
PO BOX 271, WILMINGTON, NC 28402-0271
PO BOX 272, WILMINGTON, NC 28402-0272
PO BOX 273, WILMINGTON, NC 28402-0273
PO BOX 274, WILMINGTON, NC 28402-0274
PO BOX 275, WILMINGTON, NC 28402-0275
PO BOX 276, WILMINGTON, NC 28402-0276
PO BOX 277, WILMINGTON, NC 28402-0277
PO BOX 278, WILMINGTON, NC 28402-0278
PO BOX 279, WILMINGTON, NC 28402-0279
PO BOX 280, WILMINGTON, NC 28402-0280
PO BOX 281, WILMINGTON, NC 28402-0281
PO BOX 282, WILMINGTON, NC 28402-0282
PO BOX 283, WILMINGTON, NC 28402-0283
PO BOX 284, WILMINGTON, NC 28402-0284
PO BOX 285, WILMINGTON, NC 28402-0285
PO BOX 286, WILMINGTON, NC 28402-0286
PO BOX 287, WILMINGTON, NC 28402-0287
PO BOX 288, WILMINGTON, NC 28402-0288
PO BOX 289, WILMINGTON, NC 28402-0289
PO BOX 290, WILMINGTON, NC 28402-0290
PO BOX 291, WILMINGTON, NC 28402-0291
PO BOX 292, WILMINGTON, NC 28402-0292
PO BOX 293, WILMINGTON, NC 28402-0293
PO BOX 294, WILMINGTON, NC 28402-0294
PO BOX 295, WILMINGTON, NC 28402-0295
PO BOX 296, WILMINGTON, NC 28402-0296
PO BOX 297, WILMINGTON, NC 28402-0297
PO BOX 298, WILMINGTON, NC 28402-0298
PO BOX 299, WILMINGTON, NC 28402-0299
PO BOX 300, WILMINGTON, NC 28402-0300
PO BOX 301, WILMINGTON, NC 28402-0301
PO BOX 302, WILMINGTON, NC 28402-0302
PO BOX 303, WILMINGTON, NC 28402-0303
PO BOX 304, WILMINGTON, NC 28402-0304
PO BOX 305, WILMINGTON, NC 28402-0305
PO BOX 306, WILMINGTON, NC 28402-0306
PO BOX 307, WILMINGTON, NC 28402-0307
PO BOX 308, WILMINGTON, NC 28402-0308
PO BOX 309, WILMINGTON, NC 28402-0309
PO BOX 310, WILMINGTON, NC 28402-0310
PO BOX 311, WILMINGTON, NC 28402-0311
PO BOX 312, WILMINGTON, NC 28402-0312
PO BOX 313, WILMINGTON, NC 28402-0313
PO BOX 314, WILMINGTON, NC 28402-0314
PO BOX 315, WILMINGTON, NC 28402-0315
PO BOX 316, WILMINGTON, NC 28402-0316
PO BOX 317, WILMINGTON, NC 28402-0317
PO BOX 318, WILMINGTON, NC 28402-0318
PO BOX 319, WILMINGTON, NC 28402-0319
PO BOX 320, WILMINGTON, NC 28402-0320
PO BOX 321, WILMINGTON, NC 28402-0321
PO BOX 322, WILMINGTON, NC 28402-0322
PO BOX 323, WILMINGTON, NC 28402-0323
PO BOX 324, WILMINGTON, NC 28402-0324
PO BOX 325, WILMINGTON, NC 28402-0325
PO BOX 326, WILMINGTON, NC 28402-0326
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