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, SPARTANBURG, SC 29304-0181
PO BOX 182, SPARTANBURG, SC 29304-0182
PO BOX 183, SPARTANBURG, SC 29304-0183
PO BOX 184, SPARTANBURG, SC 29304-0184
PO BOX 185, SPARTANBURG, SC 29304-0185
PO BOX 186, SPARTANBURG, SC 29304-0186
PO BOX 187, SPARTANBURG, SC 29304-0187
PO BOX 188, SPARTANBURG, SC 29304-0188
PO BOX 189, SPARTANBURG, SC 29304-0189
PO BOX 190, SPARTANBURG, SC 29304-0190
PO BOX 191, SPARTANBURG, SC 29304-0191
PO BOX 192, SPARTANBURG, SC 29304-0192
PO BOX 193, SPARTANBURG, SC 29304-0193
PO BOX 194, SPARTANBURG, SC 29304-0194
PO BOX 195, SPARTANBURG, SC 29304-0195
PO BOX 196, SPARTANBURG, SC 29304-0196
PO BOX 197, SPARTANBURG, SC 29304-0197
PO BOX 198, SPARTANBURG, SC 29304-0198
PO BOX 199, SPARTANBURG, SC 29304-0199
PO BOX 200, SPARTANBURG, SC 29304-0200
PO BOX 201, SPARTANBURG, SC 29304-0201
PO BOX 202, SPARTANBURG, SC 29304-0202
PO BOX 203, SPARTANBURG, SC 29304-0203
PO BOX 204, SPARTANBURG, SC 29304-0204
PO BOX 205, SPARTANBURG, SC 29304-0205
PO BOX 206, SPARTANBURG, SC 29304-0206
PO BOX 207, SPARTANBURG, SC 29304-0207
PO BOX 208, SPARTANBURG, SC 29304-0208
PO BOX 209, SPARTANBURG, SC 29304-0209
PO BOX 210, SPARTANBURG, SC 29304-0210
PO BOX 211, SPARTANBURG, SC 29304-0211
PO BOX 212, SPARTANBURG, SC 29304-0212
PO BOX 213, SPARTANBURG, SC 29304-0213
PO BOX 214, SPARTANBURG, SC 29304-0214
PO BOX 215, SPARTANBURG, SC 29304-0215
PO BOX 216, SPARTANBURG, SC 29304-0216
PO BOX 217, SPARTANBURG, SC 29304-0217
PO BOX 218, SPARTANBURG, SC 29304-0218
PO BOX 219, SPARTANBURG, SC 29304-0219
PO BOX 220, SPARTANBURG, SC 29304-0220
PO BOX 221, SPARTANBURG, SC 29304-0221
PO BOX 222, SPARTANBURG, SC 29304-0222
PO BOX 223, SPARTANBURG, SC 29304-0223
PO BOX 224, SPARTANBURG, SC 29304-0224
PO BOX 225, SPARTANBURG, SC 29304-0225
PO BOX 226, SPARTANBURG, SC 29304-0226
PO BOX 227, SPARTANBURG, SC 29304-0227
PO BOX 228, SPARTANBURG, SC 29304-0228
PO BOX 229, SPARTANBURG, SC 29304-0229
PO BOX 230, SPARTANBURG, SC 29304-0230
PO BOX 231, SPARTANBURG, SC 29304-0231
PO BOX 232, SPARTANBURG, SC 29304-0232
PO BOX 233, SPARTANBURG, SC 29304-0233
PO BOX 234, SPARTANBURG, SC 29304-0234
PO BOX 235, SPARTANBURG, SC 29304-0235
PO BOX 236, SPARTANBURG, SC 29304-0236
PO BOX 237, SPARTANBURG, SC 29304-0237
PO BOX 238, SPARTANBURG, SC 29304-0238
PO BOX 239, SPARTANBURG, SC 29304-0239
PO BOX 240, SPARTANBURG, SC 29304-0240
PO BOX 241, SPARTANBURG, SC 29304-0241
PO BOX 242, SPARTANBURG, SC 29304-0242
PO BOX 243, SPARTANBURG, SC 29304-0243
PO BOX 244, SPARTANBURG, SC 29304-0244
PO BOX 245, SPARTANBURG, SC 29304-0245
PO BOX 246, SPARTANBURG, SC 29304-0246
PO BOX 247, SPARTANBURG, SC 29304-0247
PO BOX 248, SPARTANBURG, SC 29304-0248
PO BOX 249, SPARTANBURG, SC 29304-0249
PO BOX 250, SPARTANBURG, SC 29304-0250
PO BOX 251, SPARTANBURG, SC 29304-0251
PO BOX 252, SPARTANBURG, SC 29304-0252
PO BOX 253, SPARTANBURG, SC 29304-0253
PO BOX 254, SPARTANBURG, SC 29304-0254
PO BOX 255, SPARTANBURG, SC 29304-0255
PO BOX 256, SPARTANBURG, SC 29304-0256
PO BOX 257, SPARTANBURG, SC 29304-0257
PO BOX 258, SPARTANBURG, SC 29304-0258
PO BOX 259, SPARTANBURG, SC 29304-0259
PO BOX 260, SPARTANBURG, SC 29304-0260
PO BOX 261, SPARTANBURG, SC 29304-0261
PO BOX 262, SPARTANBURG, SC 29304-0262
PO BOX 263, SPARTANBURG, SC 29304-0263
PO BOX 264, SPARTANBURG, SC 29304-0264
PO BOX 265, SPARTANBURG, SC 29304-0265
PO BOX 266, SPARTANBURG, SC 29304-0266
PO BOX 267, SPARTANBURG, SC 29304-0267
PO BOX 268, SPARTANBURG, SC 29304-0268
PO BOX 269, SPARTANBURG, SC 29304-0269
PO BOX 270, SPARTANBURG, SC 29304-0270
PO BOX 271, SPARTANBURG, SC 29304-0271
PO BOX 272, SPARTANBURG, SC 29304-0272
PO BOX 273, SPARTANBURG, SC 29304-0273
PO BOX 274, SPARTANBURG, SC 29304-0274
PO BOX 275, SPARTANBURG, SC 29304-0275
PO BOX 276, SPARTANBURG, SC 29304-0276
PO BOX 277, SPARTANBURG, SC 29304-0277
PO BOX 278, SPARTANBURG, SC 29304-0278
PO BOX 279, SPARTANBURG, SC 29304-0279
PO BOX 280, SPARTANBURG, SC 29304-0280
PO BOX 281, SPARTANBURG, SC 29304-0281
PO BOX 282, SPARTANBURG, SC 29304-0282
PO BOX 283, SPARTANBURG, SC 29304-0283
PO BOX 284, SPARTANBURG, SC 29304-0284
PO BOX 285, SPARTANBURG, SC 29304-0285
PO BOX 286, SPARTANBURG, SC 29304-0286
PO BOX 287, SPARTANBURG, SC 29304-0287
PO BOX 288, SPARTANBURG, SC 29304-0288
PO BOX 289, SPARTANBURG, SC 29304-0289
PO BOX 290, SPARTANBURG, SC 29304-0290
PO BOX 291, SPARTANBURG, SC 29304-0291
PO BOX 292, SPARTANBURG, SC 29304-0292
PO BOX 293, SPARTANBURG, SC 29304-0293
PO BOX 294, SPARTANBURG, SC 29304-0294
PO BOX 295, SPARTANBURG, SC 29304-0295
PO BOX 296, SPARTANBURG, SC 29304-0296
PO BOX 297, SPARTANBURG, SC 29304-0297
PO BOX 298, SPARTANBURG, SC 29304-0298
PO BOX 299, SPARTANBURG, SC 29304-0299
PO BOX 300, SPARTANBURG, SC 29304-0300
PO BOX 301, SPARTANBURG, SC 29304-0301
PO BOX 302, SPARTANBURG, SC 29304-0302
PO BOX 303, SPARTANBURG, SC 29304-0303
PO BOX 304, SPARTANBURG, SC 29304-0304
PO BOX 305, SPARTANBURG, SC 29304-0305
PO BOX 306, SPARTANBURG, SC 29304-0306
PO BOX 307, SPARTANBURG, SC 29304-0307
PO BOX 308, SPARTANBURG, SC 29304-0308
PO BOX 309, SPARTANBURG, SC 29304-0309
PO BOX 310, SPARTANBURG, SC 29304-0310
PO BOX 311, SPARTANBURG, SC 29304-0311
PO BOX 312, SPARTANBURG, SC 29304-0312
PO BOX 313, SPARTANBURG, SC 29304-0313
PO BOX 314, SPARTANBURG, SC 29304-0314
PO BOX 315, SPARTANBURG, SC 29304-0315
PO BOX 316, SPARTANBURG, SC 29304-0316
PO BOX 317, SPARTANBURG, SC 29304-0317
PO BOX 318, SPARTANBURG, SC 29304-0318
PO BOX 319, SPARTANBURG, SC 29304-0319
PO BOX 320, SPARTANBURG, SC 29304-0320
PO BOX 321, SPARTANBURG, SC 29304-0321
PO BOX 322, SPARTANBURG, SC 29304-0322
PO BOX 323, SPARTANBURG, SC 29304-0323
PO BOX 324, SPARTANBURG, SC 29304-0324
PO BOX 325, SPARTANBURG, SC 29304-0325
PO BOX 326, SPARTANBURG, SC 29304-0326
PO BOX 327, SPARTANBURG, SC 29304-0327
PO BOX 328, SPARTANBURG, SC 29304-0328
PO BOX 329, SPARTANBURG, SC 29304-0329
PO BOX 330, SPARTANBURG, SC 29304-0330
PO BOX 331, SPARTANBURG, SC 29304-0331
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