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, DONORA, PA 15033-0151
PO BOX 152, DONORA, PA 15033-0152
PO BOX 153, DONORA, PA 15033-0153
PO BOX 154, DONORA, PA 15033-0154
PO BOX 155, DONORA, PA 15033-0155
PO BOX 156, DONORA, PA 15033-0156
PO BOX 157, DONORA, PA 15033-0157
PO BOX 158, DONORA, PA 15033-0158
PO BOX 159, DONORA, PA 15033-0159
PO BOX 160, DONORA, PA 15033-0160
PO BOX 161, DONORA, PA 15033-0161
PO BOX 162, DONORA, PA 15033-0162
PO BOX 163, DONORA, PA 15033-0163
PO BOX 164, DONORA, PA 15033-0164
PO BOX 165, DONORA, PA 15033-0165
PO BOX 166, DONORA, PA 15033-0166
PO BOX 167, DONORA, PA 15033-0167
PO BOX 168, DONORA, PA 15033-0168
PO BOX 169, DONORA, PA 15033-0169
PO BOX 170, DONORA, PA 15033-0170
PO BOX 171, DONORA, PA 15033-0171
PO BOX 172, DONORA, PA 15033-0172
PO BOX 173, DONORA, PA 15033-0173
PO BOX 174, DONORA, PA 15033-0174
PO BOX 175, DONORA, PA 15033-0175
PO BOX 176, DONORA, PA 15033-0176
PO BOX 177, DONORA, PA 15033-0177
PO BOX 178, DONORA, PA 15033-0178
PO BOX 179, DONORA, PA 15033-0179
PO BOX 180, DONORA, PA 15033-0180
PO BOX 181, DONORA, PA 15033-0181
PO BOX 182, DONORA, PA 15033-0182
PO BOX 183, DONORA, PA 15033-0183
PO BOX 184, DONORA, PA 15033-0184
PO BOX 185, DONORA, PA 15033-0185
PO BOX 186, DONORA, PA 15033-0186
PO BOX 187, DONORA, PA 15033-0187
PO BOX 188, DONORA, PA 15033-0188
PO BOX 189, DONORA, PA 15033-0189
PO BOX 190, DONORA, PA 15033-0190
PO BOX 191, DONORA, PA 15033-0191
PO BOX 192, DONORA, PA 15033-0192
PO BOX 193, DONORA, PA 15033-0193
PO BOX 194, DONORA, PA 15033-0194
PO BOX 195, DONORA, PA 15033-0195
PO BOX 196, DONORA, PA 15033-0196
PO BOX 197, DONORA, PA 15033-0197
PO BOX 198, DONORA, PA 15033-0198
PO BOX 199, DONORA, PA 15033-0199
PO BOX 200, DONORA, PA 15033-0200
PO BOX 201, DONORA, PA 15033-0201
PO BOX 202, DONORA, PA 15033-0202
PO BOX 203, DONORA, PA 15033-0203
PO BOX 204, DONORA, PA 15033-0204
PO BOX 205, DONORA, PA 15033-0205
PO BOX 206, DONORA, PA 15033-0206
PO BOX 207, DONORA, PA 15033-0207
PO BOX 208, DONORA, PA 15033-0208
PO BOX 209, DONORA, PA 15033-0209
PO BOX 210, DONORA, PA 15033-0210
PO BOX 211, DONORA, PA 15033-0211
PO BOX 212, DONORA, PA 15033-0212
PO BOX 213, DONORA, PA 15033-0213
PO BOX 214, DONORA, PA 15033-0214
PO BOX 215, DONORA, PA 15033-0215
PO BOX 216, DONORA, PA 15033-0216
PO BOX 217, DONORA, PA 15033-0217
PO BOX 218, DONORA, PA 15033-0218
PO BOX 219, DONORA, PA 15033-0219
PO BOX 220, DONORA, PA 15033-0220
PO BOX 221, DONORA, PA 15033-0221
PO BOX 222, DONORA, PA 15033-0222
PO BOX 223, DONORA, PA 15033-0223
PO BOX 224, DONORA, PA 15033-0224
PO BOX 225, DONORA, PA 15033-0225
PO BOX 226, DONORA, PA 15033-0226
PO BOX 227, DONORA, PA 15033-0227
PO BOX 228, DONORA, PA 15033-0228
PO BOX 229, DONORA, PA 15033-0229
PO BOX 230, DONORA, PA 15033-0230
PO BOX 231, DONORA, PA 15033-0231
PO BOX 232, DONORA, PA 15033-0232
PO BOX 233, DONORA, PA 15033-0233
PO BOX 234, DONORA, PA 15033-0234
PO BOX 235, DONORA, PA 15033-0235
PO BOX 236, DONORA, PA 15033-0236
PO BOX 237, DONORA, PA 15033-0237
PO BOX 238, DONORA, PA 15033-0238
PO BOX 239, DONORA, PA 15033-0239
PO BOX 240, DONORA, PA 15033-0240
PO BOX 241, DONORA, PA 15033-0241
PO BOX 242, DONORA, PA 15033-0242
PO BOX 243, DONORA, PA 15033-0243
PO BOX 244, DONORA, PA 15033-0244
PO BOX 245, DONORA, PA 15033-0245
PO BOX 246, DONORA, PA 15033-0246
PO BOX 247, DONORA, PA 15033-0247
PO BOX 248, DONORA, PA 15033-0248
PO BOX 249, DONORA, PA 15033-0249
PO BOX 250, DONORA, PA 15033-0250
PO BOX 251, DONORA, PA 15033-0251
PO BOX 252, DONORA, PA 15033-0252
PO BOX 253, DONORA, PA 15033-0253
PO BOX 254, DONORA, PA 15033-0254
PO BOX 255, DONORA, PA 15033-0255
PO BOX 256, DONORA, PA 15033-0256
PO BOX 257, DONORA, PA 15033-0257
PO BOX 258, DONORA, PA 15033-0258
PO BOX 259, DONORA, PA 15033-0259
PO BOX 260, DONORA, PA 15033-0260
PO BOX 261, DONORA, PA 15033-0261
PO BOX 262, DONORA, PA 15033-0262
PO BOX 263, DONORA, PA 15033-0263
PO BOX 264, DONORA, PA 15033-0264
PO BOX 265, DONORA, PA 15033-0265
PO BOX 266, DONORA, PA 15033-0266
PO BOX 267, DONORA, PA 15033-0267
PO BOX 268, DONORA, PA 15033-0268
PO BOX 269, DONORA, PA 15033-0269
PO BOX 270, DONORA, PA 15033-0270
PO BOX 271, DONORA, PA 15033-0271
PO BOX 272, DONORA, PA 15033-0272
PO BOX 273, DONORA, PA 15033-0273
PO BOX 274, DONORA, PA 15033-0274
PO BOX 275, DONORA, PA 15033-0275
PO BOX 276, DONORA, PA 15033-0276
PO BOX 277, DONORA, PA 15033-0277
PO BOX 278, DONORA, PA 15033-0278
PO BOX 279, DONORA, PA 15033-0279
PO BOX 280, DONORA, PA 15033-0280
PO BOX 281, DONORA, PA 15033-0281
PO BOX 282, DONORA, PA 15033-0282
PO BOX 283, DONORA, PA 15033-0283
PO BOX 284, DONORA, PA 15033-0284
PO BOX 285, DONORA, PA 15033-0285
PO BOX 286, DONORA, PA 15033-0286
PO BOX 287, DONORA, PA 15033-0287
PO BOX 288, DONORA, PA 15033-0288
PO BOX 289, DONORA, PA 15033-0289
PO BOX 290, DONORA, PA 15033-0290
PO BOX 291, DONORA, PA 15033-0291
PO BOX 292, DONORA, PA 15033-0292
PO BOX 293, DONORA, PA 15033-0293
PO BOX 294, DONORA, PA 15033-0294
PO BOX 295, DONORA, PA 15033-0295
PO BOX 296, DONORA, PA 15033-0296
PO BOX 297, DONORA, PA 15033-0297
PO BOX 298, DONORA, PA 15033-0298
PO BOX 299, DONORA, PA 15033-0299
PO BOX 300, DONORA, PA 15033-0300
PO BOX 301, DONORA, PA 15033-0301
PO BOX 302, DONORA, PA 15033-0302
PO BOX 303, DONORA, PA 15033-0303
PO BOX 304, DONORA, PA 15033-0304
PO BOX 305, DONORA, PA 15033-0305
PO BOX 306, DONORA, PA 15033-0306
PO BOX 307, DONORA, PA 15033-0307
PO BOX 308, DONORA, PA 15033-0308
PO BOX 309, DONORA, PA 15033-0309
PO BOX 310, DONORA, PA 15033-0310
PO BOX 311, DONORA, PA 15033-0311
PO BOX 312, DONORA, PA 15033-0312
PO BOX 313, DONORA, PA 15033-0313
PO BOX 314, DONORA, PA 15033-0314
PO BOX 315, DONORA, PA 15033-0315
PO BOX 316, DONORA, PA 15033-0316
PO BOX 317, DONORA, PA 15033-0317
PO BOX 318, DONORA, PA 15033-0318
PO BOX 319, DONORA, PA 15033-0319
PO BOX 320, DONORA, PA 15033-0320
PO BOX 321, DONORA, PA 15033-0321
PO BOX 322, DONORA, PA 15033-0322
PO BOX 323, DONORA, PA 15033-0323
PO BOX 324, DONORA, PA 15033-0324
PO BOX 325, DONORA, PA 15033-0325
PO BOX 326, DONORA, PA 15033-0326
PO BOX 327, DONORA, PA 15033-0327
PO BOX 328, DONORA, PA 15033-0328
PO BOX 329, DONORA, PA 15033-0329
PO BOX 330, DONORA, PA 15033-0330
PO BOX 331, DONORA, PA 15033-0331
PO BOX 332, DONORA, PA 15033-0332
PO BOX 333, DONORA, PA 15033-0333
PO BOX 334, DONORA, PA 15033-0334
PO BOX 335, DONORA, PA 15033-0335
PO BOX 336, DONORA, PA 15033-0336
PO BOX 337, DONORA, PA 15033-0337
PO BOX 338, DONORA, PA 15033-0338
PO BOX 339, DONORA, PA 15033-0339
PO BOX 340, DONORA, PA 15033-0340
PO BOX 341, DONORA, PA 15033-0341
PO BOX 342, DONORA, PA 15033-0342
PO BOX 343, DONORA, PA 15033-0343
PO BOX 344, DONORA, PA 15033-0344
PO BOX 345, DONORA, PA 15033-0345
PO BOX 346, DONORA, PA 15033-0346
PO BOX 347, DONORA, PA 15033-0347
PO BOX 348, DONORA, PA 15033-0348
PO BOX 349, DONORA, PA 15033-0349
PO BOX 350, DONORA, PA 15033-0350
PO BOX 351, DONORA, PA 15033-0351
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