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 201, BLAIRS MILLS, PA 17213-0201
PO BOX 202, BLAIRS MILLS, PA 17213-0202
PO BOX 203, BLAIRS MILLS, PA 17213-0203
PO BOX 204, BLAIRS MILLS, PA 17213-0204
PO BOX 205, BLAIRS MILLS, PA 17213-0205
PO BOX 206, BLAIRS MILLS, PA 17213-0206
PO BOX 207, BLAIRS MILLS, PA 17213-0207
PO BOX 208, BLAIRS MILLS, PA 17213-0208
PO BOX 209, BLAIRS MILLS, PA 17213-0209
PO BOX 210, BLAIRS MILLS, PA 17213-0210
PO BOX 211, BLAIRS MILLS, PA 17213-0211
PO BOX 212, BLAIRS MILLS, PA 17213-0212
PO BOX 213, BLAIRS MILLS, PA 17213-0213
PO BOX 214, BLAIRS MILLS, PA 17213-0214
PO BOX 215, BLAIRS MILLS, PA 17213-0215
PO BOX 216, BLAIRS MILLS, PA 17213-0216
PO BOX 217, BLAIRS MILLS, PA 17213-0217
PO BOX 218, BLAIRS MILLS, PA 17213-0218
PO BOX 219, BLAIRS MILLS, PA 17213-0219
PO BOX 220, BLAIRS MILLS, PA 17213-0220
PO BOX 221, BLAIRS MILLS, PA 17213-0221
PO BOX 222, BLAIRS MILLS, PA 17213-0222
PO BOX 223, BLAIRS MILLS, PA 17213-0223
PO BOX 224, BLAIRS MILLS, PA 17213-0224
PO BOX 225, BLAIRS MILLS, PA 17213-0225
PO BOX 226, BLAIRS MILLS, PA 17213-0226
PO BOX 227, BLAIRS MILLS, PA 17213-0227
PO BOX 228, BLAIRS MILLS, PA 17213-0228
PO BOX 229, BLAIRS MILLS, PA 17213-0229
PO BOX 230, BLAIRS MILLS, PA 17213-0230
PO BOX 231, BLAIRS MILLS, PA 17213-0231
PO BOX 232, BLAIRS MILLS, PA 17213-0232
PO BOX 233, BLAIRS MILLS, PA 17213-0233
PO BOX 234, BLAIRS MILLS, PA 17213-0234
PO BOX 235, BLAIRS MILLS, PA 17213-0235
PO BOX 236, BLAIRS MILLS, PA 17213-0236
PO BOX 237, BLAIRS MILLS, PA 17213-0237
PO BOX 238, BLAIRS MILLS, PA 17213-0238
PO BOX 239, BLAIRS MILLS, PA 17213-0239
PO BOX 240, BLAIRS MILLS, PA 17213-0240
PO BOX 241, BLAIRS MILLS, PA 17213-0241
PO BOX 242, BLAIRS MILLS, PA 17213-0242
PO BOX 243, BLAIRS MILLS, PA 17213-0243
PO BOX 244, BLAIRS MILLS, PA 17213-0244
PO BOX 245, BLAIRS MILLS, PA 17213-0245
PO BOX 246, BLAIRS MILLS, PA 17213-0246
PO BOX 247, BLAIRS MILLS, PA 17213-0247
PO BOX 248, BLAIRS MILLS, PA 17213-0248
PO BOX 249, BLAIRS MILLS, PA 17213-0249
PO BOX 250, BLAIRS MILLS, PA 17213-0250
PO BOX 251, BLAIRS MILLS, PA 17213-0251
PO BOX 252, BLAIRS MILLS, PA 17213-0252
PO BOX 253, BLAIRS MILLS, PA 17213-0253
PO BOX 254, BLAIRS MILLS, PA 17213-0254
PO BOX 255, BLAIRS MILLS, PA 17213-0255
PO BOX 256, BLAIRS MILLS, PA 17213-0256
PO BOX 257, BLAIRS MILLS, PA 17213-0257
PO BOX 258, BLAIRS MILLS, PA 17213-0258
PO BOX 259, BLAIRS MILLS, PA 17213-0259
PO BOX 260, BLAIRS MILLS, PA 17213-0260
PO BOX 261, BLAIRS MILLS, PA 17213-0261
PO BOX 262, BLAIRS MILLS, PA 17213-0262
PO BOX 263, BLAIRS MILLS, PA 17213-0263
PO BOX 264, BLAIRS MILLS, PA 17213-0264
PO BOX 265, BLAIRS MILLS, PA 17213-0265
PO BOX 266, BLAIRS MILLS, PA 17213-0266
PO BOX 267, BLAIRS MILLS, PA 17213-0267
PO BOX 268, BLAIRS MILLS, PA 17213-0268
PO BOX 269, BLAIRS MILLS, PA 17213-0269
PO BOX 270, BLAIRS MILLS, PA 17213-0270
PO BOX 271, BLAIRS MILLS, PA 17213-0271
PO BOX 272, BLAIRS MILLS, PA 17213-0272
PO BOX 273, BLAIRS MILLS, PA 17213-0273
PO BOX 274, BLAIRS MILLS, PA 17213-0274
PO BOX 275, BLAIRS MILLS, PA 17213-0275
PO BOX 276, BLAIRS MILLS, PA 17213-0276
PO BOX 277, BLAIRS MILLS, PA 17213-0277
PO BOX 278, BLAIRS MILLS, PA 17213-0278
PO BOX 279, BLAIRS MILLS, PA 17213-0279
PO BOX 280, BLAIRS MILLS, PA 17213-0280
PO BOX 281, BLAIRS MILLS, PA 17213-0281
PO BOX 282, BLAIRS MILLS, PA 17213-0282
PO BOX 283, BLAIRS MILLS, PA 17213-0283
PO BOX 284, BLAIRS MILLS, PA 17213-0284
PO BOX 285, BLAIRS MILLS, PA 17213-0285
PO BOX 286, BLAIRS MILLS, PA 17213-0286
PO BOX 287, BLAIRS MILLS, PA 17213-0287
PO BOX 288, BLAIRS MILLS, PA 17213-0288
PO BOX 289, BLAIRS MILLS, PA 17213-0289
PO BOX 290, BLAIRS MILLS, PA 17213-0290
PO BOX 291, BLAIRS MILLS, PA 17213-0291
PO BOX 292, BLAIRS MILLS, PA 17213-0292
PO BOX 293, BLAIRS MILLS, PA 17213-0293
PO BOX 294, BLAIRS MILLS, PA 17213-0294
PO BOX 295, BLAIRS MILLS, PA 17213-0295
PO BOX 296, BLAIRS MILLS, PA 17213-0296
PO BOX 297, BLAIRS MILLS, PA 17213-0297
PO BOX 298, BLAIRS MILLS, PA 17213-0298
PO BOX 299, BLAIRS MILLS, PA 17213-0299
PO BOX 300, BLAIRS MILLS, PA 17213-0300
PO BOX 301, BLAIRS MILLS, PA 17213-0301
PO BOX 302, BLAIRS MILLS, PA 17213-0302
PO BOX 303, BLAIRS MILLS, PA 17213-0303
PO BOX 304, BLAIRS MILLS, PA 17213-0304
PO BOX 305, BLAIRS MILLS, PA 17213-0305
PO BOX 306, BLAIRS MILLS, PA 17213-0306
PO BOX 307, BLAIRS MILLS, PA 17213-0307
PO BOX 308, BLAIRS MILLS, PA 17213-0308
PO BOX 309, BLAIRS MILLS, PA 17213-0309
PO BOX 310, BLAIRS MILLS, PA 17213-0310
PO BOX 311, BLAIRS MILLS, PA 17213-0311
PO BOX 312, BLAIRS MILLS, PA 17213-0312
PO BOX 313, BLAIRS MILLS, PA 17213-0313
PO BOX 314, BLAIRS MILLS, PA 17213-0314
PO BOX 315, BLAIRS MILLS, PA 17213-0315
PO BOX 316, BLAIRS MILLS, PA 17213-0316
PO BOX 317, BLAIRS MILLS, PA 17213-0317
PO BOX 318, BLAIRS MILLS, PA 17213-0318
PO BOX 319, BLAIRS MILLS, PA 17213-0319
PO BOX 320, BLAIRS MILLS, PA 17213-0320
PO BOX 321, BLAIRS MILLS, PA 17213-0321
PO BOX 322, BLAIRS MILLS, PA 17213-0322
PO BOX 323, BLAIRS MILLS, PA 17213-0323
PO BOX 324, BLAIRS MILLS, PA 17213-0324
PO BOX 325, BLAIRS MILLS, PA 17213-0325
PO BOX 326, BLAIRS MILLS, PA 17213-0326
PO BOX 327, BLAIRS MILLS, PA 17213-0327
PO BOX 328, BLAIRS MILLS, PA 17213-0328
PO BOX 329, BLAIRS MILLS, PA 17213-0329
PO BOX 330, BLAIRS MILLS, PA 17213-0330
PO BOX 331, BLAIRS MILLS, PA 17213-0331
PO BOX 332, BLAIRS MILLS, PA 17213-0332
PO BOX 333, BLAIRS MILLS, PA 17213-0333
PO BOX 334, BLAIRS MILLS, PA 17213-0334
PO BOX 335, BLAIRS MILLS, PA 17213-0335
PO BOX 336, BLAIRS MILLS, PA 17213-0336
PO BOX 337, BLAIRS MILLS, PA 17213-0337
PO BOX 338, BLAIRS MILLS, PA 17213-0338
PO BOX 339, BLAIRS MILLS, PA 17213-0339
PO BOX 340, BLAIRS MILLS, PA 17213-0340
PO BOX 341, BLAIRS MILLS, PA 17213-0341
PO BOX 342, BLAIRS MILLS, PA 17213-0342
PO BOX 343, BLAIRS MILLS, PA 17213-0343
PO BOX 344, BLAIRS MILLS, PA 17213-0344
PO BOX 345, BLAIRS MILLS, PA 17213-0345
PO BOX 346, BLAIRS MILLS, PA 17213-0346
PO BOX 347, BLAIRS MILLS, PA 17213-0347
PO BOX 348, BLAIRS MILLS, PA 17213-0348
PO BOX 349, BLAIRS MILLS, PA 17213-0349
PO BOX 350, BLAIRS MILLS, PA 17213-0350
PO BOX 351, BLAIRS MILLS, PA 17213-0351
PO BOX 352, BLAIRS MILLS, PA 17213-0352
PO BOX 353, BLAIRS MILLS, PA 17213-0353
PO BOX 354, BLAIRS MILLS, PA 17213-0354
PO BOX 355, BLAIRS MILLS, PA 17213-0355
PO BOX 356, BLAIRS MILLS, PA 17213-0356
PO BOX 357, BLAIRS MILLS, PA 17213-0357
PO BOX 358, BLAIRS MILLS, PA 17213-0358
PO BOX 359, BLAIRS MILLS, PA 17213-0359
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