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 121, POUGHKEEPSIE, NY 12602-0121
PO BOX 122, POUGHKEEPSIE, NY 12602-0122
PO BOX 123, POUGHKEEPSIE, NY 12602-0123
PO BOX 124, POUGHKEEPSIE, NY 12602-0124
PO BOX 125, POUGHKEEPSIE, NY 12602-0125
PO BOX 126, POUGHKEEPSIE, NY 12602-0126
PO BOX 127, POUGHKEEPSIE, NY 12602-0127
PO BOX 128, POUGHKEEPSIE, NY 12602-0128
PO BOX 129, POUGHKEEPSIE, NY 12602-0129
PO BOX 130, POUGHKEEPSIE, NY 12602-0130
PO BOX 131, POUGHKEEPSIE, NY 12602-0131
PO BOX 132, POUGHKEEPSIE, NY 12602-0132
PO BOX 133, POUGHKEEPSIE, NY 12602-0133
PO BOX 134, POUGHKEEPSIE, NY 12602-0134
PO BOX 135, POUGHKEEPSIE, NY 12602-0135
PO BOX 136, POUGHKEEPSIE, NY 12602-0136
PO BOX 137, POUGHKEEPSIE, NY 12602-0137
PO BOX 138, POUGHKEEPSIE, NY 12602-0138
PO BOX 139, POUGHKEEPSIE, NY 12602-0139
PO BOX 140, POUGHKEEPSIE, NY 12602-0140
PO BOX 141, POUGHKEEPSIE, NY 12602-0141
PO BOX 142, POUGHKEEPSIE, NY 12602-0142
PO BOX 143, POUGHKEEPSIE, NY 12602-0143
PO BOX 144, POUGHKEEPSIE, NY 12602-0144
PO BOX 145, POUGHKEEPSIE, NY 12602-0145
PO BOX 146, POUGHKEEPSIE, NY 12602-0146
PO BOX 147, POUGHKEEPSIE, NY 12602-0147
PO BOX 148, POUGHKEEPSIE, NY 12602-0148
PO BOX 149, POUGHKEEPSIE, NY 12602-0149
PO BOX 150, POUGHKEEPSIE, NY 12602-0150
PO BOX 151, POUGHKEEPSIE, NY 12602-0151
PO BOX 152, POUGHKEEPSIE, NY 12602-0152
PO BOX 153, POUGHKEEPSIE, NY 12602-0153
PO BOX 154, POUGHKEEPSIE, NY 12602-0154
PO BOX 155, POUGHKEEPSIE, NY 12602-0155
PO BOX 156, POUGHKEEPSIE, NY 12602-0156
PO BOX 157, POUGHKEEPSIE, NY 12602-0157
PO BOX 158, POUGHKEEPSIE, NY 12602-0158
PO BOX 159, POUGHKEEPSIE, NY 12602-0159
PO BOX 160, POUGHKEEPSIE, NY 12602-0160
PO BOX 161, POUGHKEEPSIE, NY 12602-0161
PO BOX 162, POUGHKEEPSIE, NY 12602-0162
PO BOX 163, POUGHKEEPSIE, NY 12602-0163
PO BOX 164, POUGHKEEPSIE, NY 12602-0164
PO BOX 165, POUGHKEEPSIE, NY 12602-0165
PO BOX 166, POUGHKEEPSIE, NY 12602-0166
PO BOX 167, POUGHKEEPSIE, NY 12602-0167
PO BOX 168, POUGHKEEPSIE, NY 12602-0168
PO BOX 169, POUGHKEEPSIE, NY 12602-0169
PO BOX 170, POUGHKEEPSIE, NY 12602-0170
PO BOX 171, POUGHKEEPSIE, NY 12602-0171
PO BOX 172, POUGHKEEPSIE, NY 12602-0172
PO BOX 173, POUGHKEEPSIE, NY 12602-0173
PO BOX 174, POUGHKEEPSIE, NY 12602-0174
PO BOX 175, POUGHKEEPSIE, NY 12602-0175
PO BOX 176, POUGHKEEPSIE, NY 12602-0176
PO BOX 177, POUGHKEEPSIE, NY 12602-0177
PO BOX 178, POUGHKEEPSIE, NY 12602-0178
PO BOX 179, POUGHKEEPSIE, NY 12602-0179
PO BOX 180, POUGHKEEPSIE, NY 12602-0180
PO BOX 181, POUGHKEEPSIE, NY 12602-0181
PO BOX 182, POUGHKEEPSIE, NY 12602-0182
PO BOX 183, POUGHKEEPSIE, NY 12602-0183
PO BOX 184, POUGHKEEPSIE, NY 12602-0184
PO BOX 185, POUGHKEEPSIE, NY 12602-0185
PO BOX 186, POUGHKEEPSIE, NY 12602-0186
PO BOX 187, POUGHKEEPSIE, NY 12602-0187
PO BOX 188, POUGHKEEPSIE, NY 12602-0188
PO BOX 189, POUGHKEEPSIE, NY 12602-0189
PO BOX 190, POUGHKEEPSIE, NY 12602-0190
PO BOX 191, POUGHKEEPSIE, NY 12602-0191
PO BOX 192, POUGHKEEPSIE, NY 12602-0192
PO BOX 193, POUGHKEEPSIE, NY 12602-0193
PO BOX 194, POUGHKEEPSIE, NY 12602-0194
PO BOX 195, POUGHKEEPSIE, NY 12602-0195
PO BOX 196, POUGHKEEPSIE, NY 12602-0196
PO BOX 197, POUGHKEEPSIE, NY 12602-0197
PO BOX 198, POUGHKEEPSIE, NY 12602-0198
PO BOX 199, POUGHKEEPSIE, NY 12602-0199
PO BOX 200, POUGHKEEPSIE, NY 12602-0200
PO BOX 201, POUGHKEEPSIE, NY 12602-0201
PO BOX 202, POUGHKEEPSIE, NY 12602-0202
PO BOX 203, POUGHKEEPSIE, NY 12602-0203
PO BOX 204, POUGHKEEPSIE, NY 12602-0204
PO BOX 205, POUGHKEEPSIE, NY 12602-0205
PO BOX 206, POUGHKEEPSIE, NY 12602-0206
PO BOX 207, POUGHKEEPSIE, NY 12602-0207
PO BOX 208, POUGHKEEPSIE, NY 12602-0208
PO BOX 209, POUGHKEEPSIE, NY 12602-0209
PO BOX 210, POUGHKEEPSIE, NY 12602-0210
PO BOX 211, POUGHKEEPSIE, NY 12602-0211
PO BOX 212, POUGHKEEPSIE, NY 12602-0212
PO BOX 213, POUGHKEEPSIE, NY 12602-0213
PO BOX 214, POUGHKEEPSIE, NY 12602-0214
PO BOX 215, POUGHKEEPSIE, NY 12602-0215
PO BOX 216, POUGHKEEPSIE, NY 12602-0216
PO BOX 217, POUGHKEEPSIE, NY 12602-0217
PO BOX 218, POUGHKEEPSIE, NY 12602-0218
PO BOX 219, POUGHKEEPSIE, NY 12602-0219
PO BOX 220, POUGHKEEPSIE, NY 12602-0220
PO BOX 221, POUGHKEEPSIE, NY 12602-0221
PO BOX 222, POUGHKEEPSIE, NY 12602-0222
PO BOX 223, POUGHKEEPSIE, NY 12602-0223
PO BOX 224, POUGHKEEPSIE, NY 12602-0224
PO BOX 225, POUGHKEEPSIE, NY 12602-0225
PO BOX 226, POUGHKEEPSIE, NY 12602-0226
PO BOX 227, POUGHKEEPSIE, NY 12602-0227
PO BOX 228, POUGHKEEPSIE, NY 12602-0228
PO BOX 229, POUGHKEEPSIE, NY 12602-0229
PO BOX 230, POUGHKEEPSIE, NY 12602-0230
PO BOX 231, POUGHKEEPSIE, NY 12602-0231
PO BOX 232, POUGHKEEPSIE, NY 12602-0232
PO BOX 233, POUGHKEEPSIE, NY 12602-0233
PO BOX 234, POUGHKEEPSIE, NY 12602-0234
PO BOX 235, POUGHKEEPSIE, NY 12602-0235
PO BOX 236, POUGHKEEPSIE, NY 12602-0236
PO BOX 237, POUGHKEEPSIE, NY 12602-0237
PO BOX 238, POUGHKEEPSIE, NY 12602-0238
PO BOX 239, POUGHKEEPSIE, NY 12602-0239
PO BOX 240, POUGHKEEPSIE, NY 12602-0240
PO BOX 241, POUGHKEEPSIE, NY 12602-0241
PO BOX 242, POUGHKEEPSIE, NY 12602-0242
PO BOX 243, POUGHKEEPSIE, NY 12602-0243
PO BOX 244, POUGHKEEPSIE, NY 12602-0244
PO BOX 245, POUGHKEEPSIE, NY 12602-0245
PO BOX 246, POUGHKEEPSIE, NY 12602-0246
PO BOX 247, POUGHKEEPSIE, NY 12602-0247
PO BOX 248, POUGHKEEPSIE, NY 12602-0248
PO BOX 249, POUGHKEEPSIE, NY 12602-0249
PO BOX 250, POUGHKEEPSIE, NY 12602-0250
PO BOX 251, POUGHKEEPSIE, NY 12602-0251
PO BOX 252, POUGHKEEPSIE, NY 12602-0252
PO BOX 253, POUGHKEEPSIE, NY 12602-0253
PO BOX 254, POUGHKEEPSIE, NY 12602-0254
PO BOX 255, POUGHKEEPSIE, NY 12602-0255
PO BOX 256, POUGHKEEPSIE, NY 12602-0256
PO BOX 257, POUGHKEEPSIE, NY 12602-0257
PO BOX 258, POUGHKEEPSIE, NY 12602-0258
PO BOX 259, POUGHKEEPSIE, NY 12602-0259
PO BOX 260, POUGHKEEPSIE, NY 12602-0260
PO BOX 261, POUGHKEEPSIE, NY 12602-0261
PO BOX 262, POUGHKEEPSIE, NY 12602-0262
PO BOX 263, POUGHKEEPSIE, NY 12602-0263
PO BOX 264, POUGHKEEPSIE, NY 12602-0264
PO BOX 265, POUGHKEEPSIE, NY 12602-0265
PO BOX 266, POUGHKEEPSIE, NY 12602-0266
PO BOX 267, POUGHKEEPSIE, NY 12602-0267
PO BOX 268, POUGHKEEPSIE, NY 12602-0268
PO BOX 269, POUGHKEEPSIE, NY 12602-0269
PO BOX 270, POUGHKEEPSIE, NY 12602-0270
PO BOX 271, POUGHKEEPSIE, NY 12602-0271
PO BOX 272, POUGHKEEPSIE, NY 12602-0272
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