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 151, EAST PITTSBURGH, PA 15112-0151
PO BOX 152, EAST PITTSBURGH, PA 15112-0152
PO BOX 153, EAST PITTSBURGH, PA 15112-0153
PO BOX 154, EAST PITTSBURGH, PA 15112-0154
PO BOX 155, EAST PITTSBURGH, PA 15112-0155
PO BOX 156, EAST PITTSBURGH, PA 15112-0156
PO BOX 157, EAST PITTSBURGH, PA 15112-0157
PO BOX 158, EAST PITTSBURGH, PA 15112-0158
PO BOX 159, EAST PITTSBURGH, PA 15112-0159
PO BOX 160, EAST PITTSBURGH, PA 15112-0160
PO BOX 161, EAST PITTSBURGH, PA 15112-0161
PO BOX 162, EAST PITTSBURGH, PA 15112-0162
PO BOX 163, EAST PITTSBURGH, PA 15112-0163
PO BOX 164, EAST PITTSBURGH, PA 15112-0164
PO BOX 165, EAST PITTSBURGH, PA 15112-0165
PO BOX 166, EAST PITTSBURGH, PA 15112-0166
PO BOX 167, EAST PITTSBURGH, PA 15112-0167
PO BOX 168, EAST PITTSBURGH, PA 15112-0168
PO BOX 169, EAST PITTSBURGH, PA 15112-0169
PO BOX 170, EAST PITTSBURGH, PA 15112-0170
PO BOX 171, EAST PITTSBURGH, PA 15112-0171
PO BOX 172, EAST PITTSBURGH, PA 15112-0172
PO BOX 173, EAST PITTSBURGH, PA 15112-0173
PO BOX 174, EAST PITTSBURGH, PA 15112-0174
PO BOX 175, EAST PITTSBURGH, PA 15112-0175
PO BOX 176, EAST PITTSBURGH, PA 15112-0176
PO BOX 177, EAST PITTSBURGH, PA 15112-0177
PO BOX 178, EAST PITTSBURGH, PA 15112-0178
PO BOX 179, EAST PITTSBURGH, PA 15112-0179
PO BOX 180, EAST PITTSBURGH, PA 15112-0180
PO BOX 181, EAST PITTSBURGH, PA 15112-0181
PO BOX 182, EAST PITTSBURGH, PA 15112-0182
PO BOX 183, EAST PITTSBURGH, PA 15112-0183
PO BOX 184, EAST PITTSBURGH, PA 15112-0184
PO BOX 185, EAST PITTSBURGH, PA 15112-0185
PO BOX 186, EAST PITTSBURGH, PA 15112-0186
PO BOX 187, EAST PITTSBURGH, PA 15112-0187
PO BOX 188, EAST PITTSBURGH, PA 15112-0188
PO BOX 189, EAST PITTSBURGH, PA 15112-0189
PO BOX 190, EAST PITTSBURGH, PA 15112-0190
PO BOX 191, EAST PITTSBURGH, PA 15112-0191
PO BOX 192, EAST PITTSBURGH, PA 15112-0192
PO BOX 193, EAST PITTSBURGH, PA 15112-0193
PO BOX 194, EAST PITTSBURGH, PA 15112-0194
PO BOX 195, EAST PITTSBURGH, PA 15112-0195
PO BOX 196, EAST PITTSBURGH, PA 15112-0196
PO BOX 197, EAST PITTSBURGH, PA 15112-0197
PO BOX 198, EAST PITTSBURGH, PA 15112-0198
PO BOX 199, EAST PITTSBURGH, PA 15112-0199
PO BOX 200, EAST PITTSBURGH, PA 15112-0200
PO BOX 201, EAST PITTSBURGH, PA 15112-0201
PO BOX 202, EAST PITTSBURGH, PA 15112-0202
PO BOX 203, EAST PITTSBURGH, PA 15112-0203
PO BOX 204, EAST PITTSBURGH, PA 15112-0204
PO BOX 205, EAST PITTSBURGH, PA 15112-0205
PO BOX 206, EAST PITTSBURGH, PA 15112-0206
PO BOX 207, EAST PITTSBURGH, PA 15112-0207
PO BOX 208, EAST PITTSBURGH, PA 15112-0208
PO BOX 209, EAST PITTSBURGH, PA 15112-0209
PO BOX 210, EAST PITTSBURGH, PA 15112-0210
PO BOX 211, EAST PITTSBURGH, PA 15112-0211
PO BOX 212, EAST PITTSBURGH, PA 15112-0212
PO BOX 213, EAST PITTSBURGH, PA 15112-0213
PO BOX 214, EAST PITTSBURGH, PA 15112-0214
PO BOX 215, EAST PITTSBURGH, PA 15112-0215
PO BOX 216, EAST PITTSBURGH, PA 15112-0216
PO BOX 217, EAST PITTSBURGH, PA 15112-0217
PO BOX 218, EAST PITTSBURGH, PA 15112-0218
PO BOX 219, EAST PITTSBURGH, PA 15112-0219
PO BOX 220, EAST PITTSBURGH, PA 15112-0220
PO BOX 221, EAST PITTSBURGH, PA 15112-0221
PO BOX 222, EAST PITTSBURGH, PA 15112-0222
PO BOX 223, EAST PITTSBURGH, PA 15112-0223
PO BOX 224, EAST PITTSBURGH, PA 15112-0224
PO BOX 225, EAST PITTSBURGH, PA 15112-0225
PO BOX 226, EAST PITTSBURGH, PA 15112-0226
PO BOX 227, EAST PITTSBURGH, PA 15112-0227
PO BOX 228, EAST PITTSBURGH, PA 15112-0228
PO BOX 229, EAST PITTSBURGH, PA 15112-0229
PO BOX 230, EAST PITTSBURGH, PA 15112-0230
PO BOX 231, EAST PITTSBURGH, PA 15112-0231
PO BOX 232, EAST PITTSBURGH, PA 15112-0232
PO BOX 233, EAST PITTSBURGH, PA 15112-0233
PO BOX 234, EAST PITTSBURGH, PA 15112-0234
PO BOX 235, EAST PITTSBURGH, PA 15112-0235
PO BOX 236, EAST PITTSBURGH, PA 15112-0236
PO BOX 237, EAST PITTSBURGH, PA 15112-0237
PO BOX 238, EAST PITTSBURGH, PA 15112-0238
PO BOX 239, EAST PITTSBURGH, PA 15112-0239
PO BOX 240, EAST PITTSBURGH, PA 15112-0240
PO BOX 241, EAST PITTSBURGH, PA 15112-0241
PO BOX 242, EAST PITTSBURGH, PA 15112-0242
PO BOX 243, EAST PITTSBURGH, PA 15112-0243
PO BOX 244, EAST PITTSBURGH, PA 15112-0244
PO BOX 245, EAST PITTSBURGH, PA 15112-0245
PO BOX 246, EAST PITTSBURGH, PA 15112-0246
PO BOX 247, EAST PITTSBURGH, PA 15112-0247
PO BOX 248, EAST PITTSBURGH, PA 15112-0248
PO BOX 249, EAST PITTSBURGH, PA 15112-0249
PO BOX 250, EAST PITTSBURGH, PA 15112-0250
PO BOX 251, EAST PITTSBURGH, PA 15112-0251
PO BOX 252, EAST PITTSBURGH, PA 15112-0252
PO BOX 253, EAST PITTSBURGH, PA 15112-0253
PO BOX 254, EAST PITTSBURGH, PA 15112-0254
PO BOX 255, EAST PITTSBURGH, PA 15112-0255
PO BOX 256, EAST PITTSBURGH, PA 15112-0256
PO BOX 257, EAST PITTSBURGH, PA 15112-0257
PO BOX 258, EAST PITTSBURGH, PA 15112-0258
PO BOX 259, EAST PITTSBURGH, PA 15112-0259
PO BOX 260, EAST PITTSBURGH, PA 15112-0260
PO BOX 261, EAST PITTSBURGH, PA 15112-0261
PO BOX 262, EAST PITTSBURGH, PA 15112-0262
PO BOX 263, EAST PITTSBURGH, PA 15112-0263
PO BOX 264, EAST PITTSBURGH, PA 15112-0264
PO BOX 265, EAST PITTSBURGH, PA 15112-0265
PO BOX 266, EAST PITTSBURGH, PA 15112-0266
PO BOX 267, EAST PITTSBURGH, PA 15112-0267
PO BOX 268, EAST PITTSBURGH, PA 15112-0268
PO BOX 269, EAST PITTSBURGH, PA 15112-0269
PO BOX 270, EAST PITTSBURGH, PA 15112-0270
PO BOX 271, EAST PITTSBURGH, PA 15112-0271
PO BOX 272, EAST PITTSBURGH, PA 15112-0272
PO BOX 273, EAST PITTSBURGH, PA 15112-0273
PO BOX 274, EAST PITTSBURGH, PA 15112-0274
PO BOX 275, EAST PITTSBURGH, PA 15112-0275
PO BOX 276, EAST PITTSBURGH, PA 15112-0276
PO BOX 277, EAST PITTSBURGH, PA 15112-0277
PO BOX 278, EAST PITTSBURGH, PA 15112-0278
PO BOX 279, EAST PITTSBURGH, PA 15112-0279
PO BOX 280, EAST PITTSBURGH, PA 15112-0280
PO BOX 281, EAST PITTSBURGH, PA 15112-0281
PO BOX 282, EAST PITTSBURGH, PA 15112-0282
PO BOX 283, EAST PITTSBURGH, PA 15112-0283
PO BOX 284, EAST PITTSBURGH, PA 15112-0284
PO BOX 285, EAST PITTSBURGH, PA 15112-0285
PO BOX 286, EAST PITTSBURGH, PA 15112-0286
PO BOX 287, EAST PITTSBURGH, PA 15112-0287
PO BOX 288, EAST PITTSBURGH, PA 15112-0288
PO BOX 289, EAST PITTSBURGH, PA 15112-0289
PO BOX 290, EAST PITTSBURGH, PA 15112-0290
PO BOX 291, EAST PITTSBURGH, PA 15112-0291
PO BOX 292, EAST PITTSBURGH, PA 15112-0292
PO BOX 293, EAST PITTSBURGH, PA 15112-0293
PO BOX 294, EAST PITTSBURGH, PA 15112-0294
PO BOX 295, EAST PITTSBURGH, PA 15112-0295
PO BOX 296, EAST PITTSBURGH, PA 15112-0296
PO BOX 297, EAST PITTSBURGH, PA 15112-0297
PO BOX 298, EAST PITTSBURGH, PA 15112-0298
PO BOX 299, EAST PITTSBURGH, PA 15112-0299
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