Ang isang numero ng PO BOX ay maaaring mas mababa sa o higit sa apat na digit. Para sa mga kahon ng post office, ang pangkalahatang panuntunan ay ang bawat kahon ay may sariling ZIP + 4 code.
Ang huling apat na digit ay madalas na isa sa mga sumusunod:
1. Zero kasama ang huling tatlong mga numero ng numero ng kahon (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. Ang huling apat na digit ng numero ng kahon (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. Kung ang numero ng kahon ay mas mababa sa apat na digit, sapat na mga zero ang inihanda sa harap ng numero ng kahon upang makabuo ng isang apat na digit na numero(eg. PO BOX 1, Shreveport LA 71161-0001).
Gayunpaman, walang pare-parehong panuntunan, ang zip code kasama ang apat ay para sa sanggunian lamang, ang ZIP + 4 code ay dapat na indibidwal na tiningnan para sa bawat kahon sa USPS offical website.
PO BOX 221, SOUTH DEERFIELD, MA 01373-0221
PO BOX 222, SOUTH DEERFIELD, MA 01373-0222
PO BOX 223, SOUTH DEERFIELD, MA 01373-0223
PO BOX 224, SOUTH DEERFIELD, MA 01373-0224
PO BOX 225, SOUTH DEERFIELD, MA 01373-0225
PO BOX 226, SOUTH DEERFIELD, MA 01373-0226
PO BOX 227, SOUTH DEERFIELD, MA 01373-0227
PO BOX 228, SOUTH DEERFIELD, MA 01373-0228
PO BOX 229, SOUTH DEERFIELD, MA 01373-0229
PO BOX 230, SOUTH DEERFIELD, MA 01373-0230
PO BOX 231, SOUTH DEERFIELD, MA 01373-0231
PO BOX 232, SOUTH DEERFIELD, MA 01373-0232
PO BOX 233, SOUTH DEERFIELD, MA 01373-0233
PO BOX 234, SOUTH DEERFIELD, MA 01373-0234
PO BOX 235, SOUTH DEERFIELD, MA 01373-0235
PO BOX 236, SOUTH DEERFIELD, MA 01373-0236
PO BOX 237, SOUTH DEERFIELD, MA 01373-0237
PO BOX 238, SOUTH DEERFIELD, MA 01373-0238
PO BOX 239, SOUTH DEERFIELD, MA 01373-0239
PO BOX 240, SOUTH DEERFIELD, MA 01373-0240
PO BOX 241, SOUTH DEERFIELD, MA 01373-0241
PO BOX 242, SOUTH DEERFIELD, MA 01373-0242
PO BOX 243, SOUTH DEERFIELD, MA 01373-0243
PO BOX 244, SOUTH DEERFIELD, MA 01373-0244
PO BOX 245, SOUTH DEERFIELD, MA 01373-0245
PO BOX 246, SOUTH DEERFIELD, MA 01373-0246
PO BOX 247, SOUTH DEERFIELD, MA 01373-0247
PO BOX 248, SOUTH DEERFIELD, MA 01373-0248
PO BOX 249, SOUTH DEERFIELD, MA 01373-0249
PO BOX 250, SOUTH DEERFIELD, MA 01373-0250
PO BOX 251, SOUTH DEERFIELD, MA 01373-0251
PO BOX 252, SOUTH DEERFIELD, MA 01373-0252
PO BOX 253, SOUTH DEERFIELD, MA 01373-0253
PO BOX 254, SOUTH DEERFIELD, MA 01373-0254
PO BOX 255, SOUTH DEERFIELD, MA 01373-0255
PO BOX 256, SOUTH DEERFIELD, MA 01373-0256
PO BOX 257, SOUTH DEERFIELD, MA 01373-0257
PO BOX 258, SOUTH DEERFIELD, MA 01373-0258
PO BOX 259, SOUTH DEERFIELD, MA 01373-0259
PO BOX 260, SOUTH DEERFIELD, MA 01373-0260
PO BOX 261, SOUTH DEERFIELD, MA 01373-0261
PO BOX 262, SOUTH DEERFIELD, MA 01373-0262
PO BOX 263, SOUTH DEERFIELD, MA 01373-0263
PO BOX 264, SOUTH DEERFIELD, MA 01373-0264
PO BOX 265, SOUTH DEERFIELD, MA 01373-0265
PO BOX 266, SOUTH DEERFIELD, MA 01373-0266
PO BOX 267, SOUTH DEERFIELD, MA 01373-0267
PO BOX 268, SOUTH DEERFIELD, MA 01373-0268
PO BOX 269, SOUTH DEERFIELD, MA 01373-0269
PO BOX 270, SOUTH DEERFIELD, MA 01373-0270
PO BOX 271, SOUTH DEERFIELD, MA 01373-0271
PO BOX 272, SOUTH DEERFIELD, MA 01373-0272
PO BOX 273, SOUTH DEERFIELD, MA 01373-0273
PO BOX 274, SOUTH DEERFIELD, MA 01373-0274
PO BOX 275, SOUTH DEERFIELD, MA 01373-0275
PO BOX 276, SOUTH DEERFIELD, MA 01373-0276
PO BOX 277, SOUTH DEERFIELD, MA 01373-0277
PO BOX 278, SOUTH DEERFIELD, MA 01373-0278
PO BOX 279, SOUTH DEERFIELD, MA 01373-0279
PO BOX 280, SOUTH DEERFIELD, MA 01373-0280
PO BOX 281, SOUTH DEERFIELD, MA 01373-0281
PO BOX 282, SOUTH DEERFIELD, MA 01373-0282
PO BOX 283, SOUTH DEERFIELD, MA 01373-0283
PO BOX 284, SOUTH DEERFIELD, MA 01373-0284
PO BOX 285, SOUTH DEERFIELD, MA 01373-0285
PO BOX 286, SOUTH DEERFIELD, MA 01373-0286
PO BOX 287, SOUTH DEERFIELD, MA 01373-0287
PO BOX 288, SOUTH DEERFIELD, MA 01373-0288
PO BOX 289, SOUTH DEERFIELD, MA 01373-0289
PO BOX 290, SOUTH DEERFIELD, MA 01373-0290
PO BOX 291, SOUTH DEERFIELD, MA 01373-0291
PO BOX 292, SOUTH DEERFIELD, MA 01373-0292
PO BOX 293, SOUTH DEERFIELD, MA 01373-0293
PO BOX 294, SOUTH DEERFIELD, MA 01373-0294
PO BOX 295, SOUTH DEERFIELD, MA 01373-0295
PO BOX 296, SOUTH DEERFIELD, MA 01373-0296
PO BOX 297, SOUTH DEERFIELD, MA 01373-0297
PO BOX 298, SOUTH DEERFIELD, MA 01373-0298
PO BOX 299, SOUTH DEERFIELD, MA 01373-0299
PO BOX 300, SOUTH DEERFIELD, MA 01373-0300
PO BOX 301, SOUTH DEERFIELD, MA 01373-0301
PO BOX 302, SOUTH DEERFIELD, MA 01373-0302
PO BOX 303, SOUTH DEERFIELD, MA 01373-0303
PO BOX 304, SOUTH DEERFIELD, MA 01373-0304
PO BOX 305, SOUTH DEERFIELD, MA 01373-0305
PO BOX 306, SOUTH DEERFIELD, MA 01373-0306
PO BOX 307, SOUTH DEERFIELD, MA 01373-0307
PO BOX 308, SOUTH DEERFIELD, MA 01373-0308
PO BOX 309, SOUTH DEERFIELD, MA 01373-0309
PO BOX 310, SOUTH DEERFIELD, MA 01373-0310
PO BOX 311, SOUTH DEERFIELD, MA 01373-0311
PO BOX 312, SOUTH DEERFIELD, MA 01373-0312
PO BOX 313, SOUTH DEERFIELD, MA 01373-0313
PO BOX 314, SOUTH DEERFIELD, MA 01373-0314
PO BOX 315, SOUTH DEERFIELD, MA 01373-0315
PO BOX 316, SOUTH DEERFIELD, MA 01373-0316
PO BOX 317, SOUTH DEERFIELD, MA 01373-0317
PO BOX 318, SOUTH DEERFIELD, MA 01373-0318
PO BOX 319, SOUTH DEERFIELD, MA 01373-0319
PO BOX 320, SOUTH DEERFIELD, MA 01373-0320
PO BOX 321, SOUTH DEERFIELD, MA 01373-0321
PO BOX 322, SOUTH DEERFIELD, MA 01373-0322
PO BOX 323, SOUTH DEERFIELD, MA 01373-0323
PO BOX 324, SOUTH DEERFIELD, MA 01373-0324
PO BOX 325, SOUTH DEERFIELD, MA 01373-0325
PO BOX 326, SOUTH DEERFIELD, MA 01373-0326
PO BOX 327, SOUTH DEERFIELD, MA 01373-0327
PO BOX 328, SOUTH DEERFIELD, MA 01373-0328
PO BOX 329, SOUTH DEERFIELD, MA 01373-0329
PO BOX 330, SOUTH DEERFIELD, MA 01373-0330
PO BOX 331, SOUTH DEERFIELD, MA 01373-0331
PO BOX 332, SOUTH DEERFIELD, MA 01373-0332
PO BOX 333, SOUTH DEERFIELD, MA 01373-0333
PO BOX 334, SOUTH DEERFIELD, MA 01373-0334
PO BOX 335, SOUTH DEERFIELD, MA 01373-0335
PO BOX 336, SOUTH DEERFIELD, MA 01373-0336
PO BOX 337, SOUTH DEERFIELD, MA 01373-0337
PO BOX 338, SOUTH DEERFIELD, MA 01373-0338
PO BOX 339, SOUTH DEERFIELD, MA 01373-0339
PO BOX 340, SOUTH DEERFIELD, MA 01373-0340
PO BOX 341, SOUTH DEERFIELD, MA 01373-0341
PO BOX 342, SOUTH DEERFIELD, MA 01373-0342
PO BOX 343, SOUTH DEERFIELD, MA 01373-0343
PO BOX 344, SOUTH DEERFIELD, MA 01373-0344
PO BOX 345, SOUTH DEERFIELD, MA 01373-0345
PO BOX 346, SOUTH DEERFIELD, MA 01373-0346
PO BOX 347, SOUTH DEERFIELD, MA 01373-0347
PO BOX 348, SOUTH DEERFIELD, MA 01373-0348
PO BOX 349, SOUTH DEERFIELD, MA 01373-0349
PO BOX 350, SOUTH DEERFIELD, MA 01373-0350
PO BOX 351, SOUTH DEERFIELD, MA 01373-0351
PO BOX 352, SOUTH DEERFIELD, MA 01373-0352
PO BOX 353, SOUTH DEERFIELD, MA 01373-0353
PO BOX 354, SOUTH DEERFIELD, MA 01373-0354
PO BOX 355, SOUTH DEERFIELD, MA 01373-0355
PO BOX 356, SOUTH DEERFIELD, MA 01373-0356
PO BOX 357, SOUTH DEERFIELD, MA 01373-0357
PO BOX 358, SOUTH DEERFIELD, MA 01373-0358
PO BOX 359, SOUTH DEERFIELD, MA 01373-0359
PO BOX 360, SOUTH DEERFIELD, MA 01373-0360
PO BOX 361, SOUTH DEERFIELD, MA 01373-0361
PO BOX 362, SOUTH DEERFIELD, MA 01373-0362
PO BOX 363, SOUTH DEERFIELD, MA 01373-0363
PO BOX 364, SOUTH DEERFIELD, MA 01373-0364
PO BOX 365, SOUTH DEERFIELD, MA 01373-0365
PO BOX 366, SOUTH DEERFIELD, MA 01373-0366
PO BOX 367, SOUTH DEERFIELD, MA 01373-0367
PO BOX 368, SOUTH DEERFIELD, MA 01373-0368
PO BOX 369, SOUTH DEERFIELD, MA 01373-0369
PO BOX 370, SOUTH DEERFIELD, MA 01373-0370
PO BOX 371, SOUTH DEERFIELD, MA 01373-0371
PO BOX 372, SOUTH DEERFIELD, MA 01373-0372
PO BOX 373, SOUTH DEERFIELD, MA 01373-0373
PO BOX 374, SOUTH DEERFIELD, MA 01373-0374
PO BOX 375, SOUTH DEERFIELD, MA 01373-0375
PO BOX 376, SOUTH DEERFIELD, MA 01373-0376
PO BOX 377, SOUTH DEERFIELD, MA 01373-0377
PO BOX 378, SOUTH DEERFIELD, MA 01373-0378
PO BOX 379, SOUTH DEERFIELD, MA 01373-0379
PO BOX 380, SOUTH DEERFIELD, MA 01373-0380
PO BOX 381, SOUTH DEERFIELD, MA 01373-0381
PO BOX 382, SOUTH DEERFIELD, MA 01373-0382
PO BOX 383, SOUTH DEERFIELD, MA 01373-0383
PO BOX 384, SOUTH DEERFIELD, MA 01373-0384
PO BOX 385, SOUTH DEERFIELD, MA 01373-0385
PO BOX 386, SOUTH DEERFIELD, MA 01373-0386
PO BOX 387, SOUTH DEERFIELD, MA 01373-0387
PO BOX 388, SOUTH DEERFIELD, MA 01373-0388
PO BOX 389, SOUTH DEERFIELD, MA 01373-0389
PO BOX 390, SOUTH DEERFIELD, MA 01373-0390
PO BOX 391, SOUTH DEERFIELD, MA 01373-0391
PO BOX 392, SOUTH DEERFIELD, MA 01373-0392
PO BOX 393, SOUTH DEERFIELD, MA 01373-0393
PO BOX 394, SOUTH DEERFIELD, MA 01373-0394
PO BOX 395, SOUTH DEERFIELD, MA 01373-0395
PO BOX 396, SOUTH DEERFIELD, MA 01373-0396
PO BOX 397, SOUTH DEERFIELD, MA 01373-0397
PO BOX 398, SOUTH DEERFIELD, MA 01373-0398
PO BOX 399, SOUTH DEERFIELD, MA 01373-0399
PO BOX 400, SOUTH DEERFIELD, MA 01373-0400
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