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 171, NORTH SPRINGFIELD, VT 05150-0171
PO BOX 172, NORTH SPRINGFIELD, VT 05150-0172
PO BOX 173, NORTH SPRINGFIELD, VT 05150-0173
PO BOX 174, NORTH SPRINGFIELD, VT 05150-0174
PO BOX 175, NORTH SPRINGFIELD, VT 05150-0175
PO BOX 176, NORTH SPRINGFIELD, VT 05150-0176
PO BOX 177, NORTH SPRINGFIELD, VT 05150-0177
PO BOX 178, NORTH SPRINGFIELD, VT 05150-0178
PO BOX 179, NORTH SPRINGFIELD, VT 05150-0179
PO BOX 180, NORTH SPRINGFIELD, VT 05150-0180
PO BOX 181, NORTH SPRINGFIELD, VT 05150-0181
PO BOX 182, NORTH SPRINGFIELD, VT 05150-0182
PO BOX 183, NORTH SPRINGFIELD, VT 05150-0183
PO BOX 184, NORTH SPRINGFIELD, VT 05150-0184
PO BOX 185, NORTH SPRINGFIELD, VT 05150-0185
PO BOX 186, NORTH SPRINGFIELD, VT 05150-0186
PO BOX 187, NORTH SPRINGFIELD, VT 05150-0187
PO BOX 188, NORTH SPRINGFIELD, VT 05150-0188
PO BOX 189, NORTH SPRINGFIELD, VT 05150-0189
PO BOX 190, NORTH SPRINGFIELD, VT 05150-0190
PO BOX 191, NORTH SPRINGFIELD, VT 05150-0191
PO BOX 192, NORTH SPRINGFIELD, VT 05150-0192
PO BOX 193, NORTH SPRINGFIELD, VT 05150-0193
PO BOX 194, NORTH SPRINGFIELD, VT 05150-0194
PO BOX 195, NORTH SPRINGFIELD, VT 05150-0195
PO BOX 196, NORTH SPRINGFIELD, VT 05150-0196
PO BOX 197, NORTH SPRINGFIELD, VT 05150-0197
PO BOX 198, NORTH SPRINGFIELD, VT 05150-0198
PO BOX 199, NORTH SPRINGFIELD, VT 05150-0199
PO BOX 200, NORTH SPRINGFIELD, VT 05150-0200
PO BOX 201, NORTH SPRINGFIELD, VT 05150-0201
PO BOX 202, NORTH SPRINGFIELD, VT 05150-0202
PO BOX 203, NORTH SPRINGFIELD, VT 05150-0203
PO BOX 204, NORTH SPRINGFIELD, VT 05150-0204
PO BOX 205, NORTH SPRINGFIELD, VT 05150-0205
PO BOX 206, NORTH SPRINGFIELD, VT 05150-0206
PO BOX 207, NORTH SPRINGFIELD, VT 05150-0207
PO BOX 208, NORTH SPRINGFIELD, VT 05150-0208
PO BOX 209, NORTH SPRINGFIELD, VT 05150-0209
PO BOX 210, NORTH SPRINGFIELD, VT 05150-0210
PO BOX 211, NORTH SPRINGFIELD, VT 05150-0211
PO BOX 212, NORTH SPRINGFIELD, VT 05150-0212
PO BOX 213, NORTH SPRINGFIELD, VT 05150-0213
PO BOX 214, NORTH SPRINGFIELD, VT 05150-0214
PO BOX 215, NORTH SPRINGFIELD, VT 05150-0215
PO BOX 216, NORTH SPRINGFIELD, VT 05150-0216
PO BOX 217, NORTH SPRINGFIELD, VT 05150-0217
PO BOX 218, NORTH SPRINGFIELD, VT 05150-0218
PO BOX 219, NORTH SPRINGFIELD, VT 05150-0219
PO BOX 220, NORTH SPRINGFIELD, VT 05150-0220
PO BOX 221, NORTH SPRINGFIELD, VT 05150-0221
PO BOX 222, NORTH SPRINGFIELD, VT 05150-0222
PO BOX 223, NORTH SPRINGFIELD, VT 05150-0223
PO BOX 224, NORTH SPRINGFIELD, VT 05150-0224
PO BOX 225, NORTH SPRINGFIELD, VT 05150-0225
PO BOX 226, NORTH SPRINGFIELD, VT 05150-0226
PO BOX 227, NORTH SPRINGFIELD, VT 05150-0227
PO BOX 228, NORTH SPRINGFIELD, VT 05150-0228
PO BOX 229, NORTH SPRINGFIELD, VT 05150-0229
PO BOX 230, NORTH SPRINGFIELD, VT 05150-0230
PO BOX 231, NORTH SPRINGFIELD, VT 05150-0231
PO BOX 232, NORTH SPRINGFIELD, VT 05150-0232
PO BOX 233, NORTH SPRINGFIELD, VT 05150-0233
PO BOX 234, NORTH SPRINGFIELD, VT 05150-0234
PO BOX 235, NORTH SPRINGFIELD, VT 05150-0235
PO BOX 236, NORTH SPRINGFIELD, VT 05150-0236
PO BOX 237, NORTH SPRINGFIELD, VT 05150-0237
PO BOX 238, NORTH SPRINGFIELD, VT 05150-0238
PO BOX 239, NORTH SPRINGFIELD, VT 05150-0239
PO BOX 240, NORTH SPRINGFIELD, VT 05150-0240
PO BOX 241, NORTH SPRINGFIELD, VT 05150-0241
PO BOX 242, NORTH SPRINGFIELD, VT 05150-0242
PO BOX 243, NORTH SPRINGFIELD, VT 05150-0243
PO BOX 244, NORTH SPRINGFIELD, VT 05150-0244
PO BOX 245, NORTH SPRINGFIELD, VT 05150-0245
PO BOX 246, NORTH SPRINGFIELD, VT 05150-0246
PO BOX 247, NORTH SPRINGFIELD, VT 05150-0247
PO BOX 248, NORTH SPRINGFIELD, VT 05150-0248
PO BOX 249, NORTH SPRINGFIELD, VT 05150-0249
PO BOX 250, NORTH SPRINGFIELD, VT 05150-0250
PO BOX 251, NORTH SPRINGFIELD, VT 05150-0251
PO BOX 252, NORTH SPRINGFIELD, VT 05150-0252
PO BOX 253, NORTH SPRINGFIELD, VT 05150-0253
PO BOX 254, NORTH SPRINGFIELD, VT 05150-0254
PO BOX 255, NORTH SPRINGFIELD, VT 05150-0255
PO BOX 256, NORTH SPRINGFIELD, VT 05150-0256
PO BOX 257, NORTH SPRINGFIELD, VT 05150-0257
PO BOX 258, NORTH SPRINGFIELD, VT 05150-0258
PO BOX 259, NORTH SPRINGFIELD, VT 05150-0259
PO BOX 260, NORTH SPRINGFIELD, VT 05150-0260
PO BOX 261, NORTH SPRINGFIELD, VT 05150-0261
PO BOX 262, NORTH SPRINGFIELD, VT 05150-0262
PO BOX 263, NORTH SPRINGFIELD, VT 05150-0263
PO BOX 264, NORTH SPRINGFIELD, VT 05150-0264
PO BOX 265, NORTH SPRINGFIELD, VT 05150-0265
PO BOX 266, NORTH SPRINGFIELD, VT 05150-0266
PO BOX 267, NORTH SPRINGFIELD, VT 05150-0267
PO BOX 268, NORTH SPRINGFIELD, VT 05150-0268
PO BOX 269, NORTH SPRINGFIELD, VT 05150-0269
PO BOX 270, NORTH SPRINGFIELD, VT 05150-0270
PO BOX 271, NORTH SPRINGFIELD, VT 05150-0271
PO BOX 272, NORTH SPRINGFIELD, VT 05150-0272
PO BOX 273, NORTH SPRINGFIELD, VT 05150-0273
PO BOX 274, NORTH SPRINGFIELD, VT 05150-0274
PO BOX 275, NORTH SPRINGFIELD, VT 05150-0275
PO BOX 276, NORTH SPRINGFIELD, VT 05150-0276
PO BOX 277, NORTH SPRINGFIELD, VT 05150-0277
PO BOX 278, NORTH SPRINGFIELD, VT 05150-0278
PO BOX 279, NORTH SPRINGFIELD, VT 05150-0279
PO BOX 280, NORTH SPRINGFIELD, VT 05150-0280
PO BOX 281, NORTH SPRINGFIELD, VT 05150-0281
PO BOX 282, NORTH SPRINGFIELD, VT 05150-0282
PO BOX 283, NORTH SPRINGFIELD, VT 05150-0283
PO BOX 284, NORTH SPRINGFIELD, VT 05150-0284
PO BOX 285, NORTH SPRINGFIELD, VT 05150-0285
PO BOX 286, NORTH SPRINGFIELD, VT 05150-0286
PO BOX 287, NORTH SPRINGFIELD, VT 05150-0287
PO BOX 288, NORTH SPRINGFIELD, VT 05150-0288
PO BOX 289, NORTH SPRINGFIELD, VT 05150-0289
PO BOX 290, NORTH SPRINGFIELD, VT 05150-0290
PO BOX 291, NORTH SPRINGFIELD, VT 05150-0291
PO BOX 292, NORTH SPRINGFIELD, VT 05150-0292
PO BOX 293, NORTH SPRINGFIELD, VT 05150-0293
PO BOX 294, NORTH SPRINGFIELD, VT 05150-0294
PO BOX 295, NORTH SPRINGFIELD, VT 05150-0295
PO BOX 296, NORTH SPRINGFIELD, VT 05150-0296
PO BOX 297, NORTH SPRINGFIELD, VT 05150-0297
PO BOX 298, NORTH SPRINGFIELD, VT 05150-0298
PO BOX 299, NORTH SPRINGFIELD, VT 05150-0299
PO BOX 300, NORTH SPRINGFIELD, VT 05150-0300
PO BOX 301, NORTH SPRINGFIELD, VT 05150-0301
PO BOX 302, NORTH SPRINGFIELD, VT 05150-0302
PO BOX 303, NORTH SPRINGFIELD, VT 05150-0303
PO BOX 304, NORTH SPRINGFIELD, VT 05150-0304
PO BOX 305, NORTH SPRINGFIELD, VT 05150-0305
PO BOX 306, NORTH SPRINGFIELD, VT 05150-0306
PO BOX 307, NORTH SPRINGFIELD, VT 05150-0307
PO BOX 308, NORTH SPRINGFIELD, VT 05150-0308
PO BOX 309, NORTH SPRINGFIELD, VT 05150-0309
PO BOX 310, NORTH SPRINGFIELD, VT 05150-0310
PO BOX 311, NORTH SPRINGFIELD, VT 05150-0311
PO BOX 312, NORTH SPRINGFIELD, VT 05150-0312
PO BOX 313, NORTH SPRINGFIELD, VT 05150-0313
PO BOX 314, NORTH SPRINGFIELD, VT 05150-0314
PO BOX 315, NORTH SPRINGFIELD, VT 05150-0315
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