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, STAR JUNCTION, PA 15482-0121
PO BOX 122, STAR JUNCTION, PA 15482-0122
PO BOX 123, STAR JUNCTION, PA 15482-0123
PO BOX 124, STAR JUNCTION, PA 15482-0124
PO BOX 125, STAR JUNCTION, PA 15482-0125
PO BOX 126, STAR JUNCTION, PA 15482-0126
PO BOX 127, STAR JUNCTION, PA 15482-0127
PO BOX 128, STAR JUNCTION, PA 15482-0128
PO BOX 129, STAR JUNCTION, PA 15482-0129
PO BOX 130, STAR JUNCTION, PA 15482-0130
PO BOX 131, STAR JUNCTION, PA 15482-0131
PO BOX 132, STAR JUNCTION, PA 15482-0132
PO BOX 133, STAR JUNCTION, PA 15482-0133
PO BOX 134, STAR JUNCTION, PA 15482-0134
PO BOX 135, STAR JUNCTION, PA 15482-0135
PO BOX 136, STAR JUNCTION, PA 15482-0136
PO BOX 137, STAR JUNCTION, PA 15482-0137
PO BOX 138, STAR JUNCTION, PA 15482-0138
PO BOX 139, STAR JUNCTION, PA 15482-0139
PO BOX 140, STAR JUNCTION, PA 15482-0140
PO BOX 141, STAR JUNCTION, PA 15482-0141
PO BOX 142, STAR JUNCTION, PA 15482-0142
PO BOX 143, STAR JUNCTION, PA 15482-0143
PO BOX 144, STAR JUNCTION, PA 15482-0144
PO BOX 145, STAR JUNCTION, PA 15482-0145
PO BOX 146, STAR JUNCTION, PA 15482-0146
PO BOX 147, STAR JUNCTION, PA 15482-0147
PO BOX 148, STAR JUNCTION, PA 15482-0148
PO BOX 149, STAR JUNCTION, PA 15482-0149
PO BOX 150, STAR JUNCTION, PA 15482-0150
PO BOX 151, STAR JUNCTION, PA 15482-0151
PO BOX 152, STAR JUNCTION, PA 15482-0152
PO BOX 153, STAR JUNCTION, PA 15482-0153
PO BOX 154, STAR JUNCTION, PA 15482-0154
PO BOX 155, STAR JUNCTION, PA 15482-0155
PO BOX 156, STAR JUNCTION, PA 15482-0156
PO BOX 157, STAR JUNCTION, PA 15482-0157
PO BOX 158, STAR JUNCTION, PA 15482-0158
PO BOX 159, STAR JUNCTION, PA 15482-0159
PO BOX 160, STAR JUNCTION, PA 15482-0160
PO BOX 161, STAR JUNCTION, PA 15482-0161
PO BOX 162, STAR JUNCTION, PA 15482-0162
PO BOX 163, STAR JUNCTION, PA 15482-0163
PO BOX 164, STAR JUNCTION, PA 15482-0164
PO BOX 165, STAR JUNCTION, PA 15482-0165
PO BOX 166, STAR JUNCTION, PA 15482-0166
PO BOX 167, STAR JUNCTION, PA 15482-0167
PO BOX 168, STAR JUNCTION, PA 15482-0168
PO BOX 169, STAR JUNCTION, PA 15482-0169
PO BOX 170, STAR JUNCTION, PA 15482-0170
PO BOX 171, STAR JUNCTION, PA 15482-0171
PO BOX 172, STAR JUNCTION, PA 15482-0172
PO BOX 173, STAR JUNCTION, PA 15482-0173
PO BOX 174, STAR JUNCTION, PA 15482-0174
PO BOX 175, STAR JUNCTION, PA 15482-0175
PO BOX 176, STAR JUNCTION, PA 15482-0176
PO BOX 177, STAR JUNCTION, PA 15482-0177
PO BOX 178, STAR JUNCTION, PA 15482-0178
PO BOX 179, STAR JUNCTION, PA 15482-0179
PO BOX 180, STAR JUNCTION, PA 15482-0180
PO BOX 181, STAR JUNCTION, PA 15482-0181
PO BOX 182, STAR JUNCTION, PA 15482-0182
PO BOX 183, STAR JUNCTION, PA 15482-0183
PO BOX 184, STAR JUNCTION, PA 15482-0184
PO BOX 185, STAR JUNCTION, PA 15482-0185
PO BOX 186, STAR JUNCTION, PA 15482-0186
PO BOX 187, STAR JUNCTION, PA 15482-0187
PO BOX 188, STAR JUNCTION, PA 15482-0188
PO BOX 189, STAR JUNCTION, PA 15482-0189
PO BOX 190, STAR JUNCTION, PA 15482-0190
PO BOX 191, STAR JUNCTION, PA 15482-0191
PO BOX 192, STAR JUNCTION, PA 15482-0192
PO BOX 193, STAR JUNCTION, PA 15482-0193
PO BOX 194, STAR JUNCTION, PA 15482-0194
PO BOX 195, STAR JUNCTION, PA 15482-0195
PO BOX 196, STAR JUNCTION, PA 15482-0196
PO BOX 197, STAR JUNCTION, PA 15482-0197
PO BOX 198, STAR JUNCTION, PA 15482-0198
PO BOX 199, STAR JUNCTION, PA 15482-0199
PO BOX 200, STAR JUNCTION, PA 15482-0200
PO BOX 201, STAR JUNCTION, PA 15482-0201
PO BOX 202, STAR JUNCTION, PA 15482-0202
PO BOX 203, STAR JUNCTION, PA 15482-0203
PO BOX 204, STAR JUNCTION, PA 15482-0204
PO BOX 205, STAR JUNCTION, PA 15482-0205
PO BOX 206, STAR JUNCTION, PA 15482-0206
PO BOX 207, STAR JUNCTION, PA 15482-0207
PO BOX 208, STAR JUNCTION, PA 15482-0208
PO BOX 209, STAR JUNCTION, PA 15482-0209
PO BOX 210, STAR JUNCTION, PA 15482-0210
PO BOX 211, STAR JUNCTION, PA 15482-0211
PO BOX 212, STAR JUNCTION, PA 15482-0212
PO BOX 213, STAR JUNCTION, PA 15482-0213
PO BOX 214, STAR JUNCTION, PA 15482-0214
PO BOX 215, STAR JUNCTION, PA 15482-0215
PO BOX 216, STAR JUNCTION, PA 15482-0216
PO BOX 217, STAR JUNCTION, PA 15482-0217
PO BOX 218, STAR JUNCTION, PA 15482-0218
PO BOX 219, STAR JUNCTION, PA 15482-0219
PO BOX 220, STAR JUNCTION, PA 15482-0220
PO BOX 221, STAR JUNCTION, PA 15482-0221
PO BOX 222, STAR JUNCTION, PA 15482-0222
PO BOX 223, STAR JUNCTION, PA 15482-0223
PO BOX 224, STAR JUNCTION, PA 15482-0224
PO BOX 225, STAR JUNCTION, PA 15482-0225
PO BOX 226, STAR JUNCTION, PA 15482-0226
PO BOX 227, STAR JUNCTION, PA 15482-0227
PO BOX 228, STAR JUNCTION, PA 15482-0228
PO BOX 229, STAR JUNCTION, PA 15482-0229
PO BOX 230, STAR JUNCTION, PA 15482-0230
PO BOX 231, STAR JUNCTION, PA 15482-0231
PO BOX 232, STAR JUNCTION, PA 15482-0232
PO BOX 233, STAR JUNCTION, PA 15482-0233
PO BOX 234, STAR JUNCTION, PA 15482-0234
PO BOX 235, STAR JUNCTION, PA 15482-0235
PO BOX 236, STAR JUNCTION, PA 15482-0236
PO BOX 237, STAR JUNCTION, PA 15482-0237
PO BOX 238, STAR JUNCTION, PA 15482-0238
PO BOX 239, STAR JUNCTION, PA 15482-0239
PO BOX 240, STAR JUNCTION, PA 15482-0240
PO BOX 241, STAR JUNCTION, PA 15482-0241
PO BOX 242, STAR JUNCTION, PA 15482-0242
PO BOX 243, STAR JUNCTION, PA 15482-0243
PO BOX 244, STAR JUNCTION, PA 15482-0244
PO BOX 245, STAR JUNCTION, PA 15482-0245
PO BOX 246, STAR JUNCTION, PA 15482-0246
PO BOX 247, STAR JUNCTION, PA 15482-0247
PO BOX 248, STAR JUNCTION, PA 15482-0248
PO BOX 249, STAR JUNCTION, PA 15482-0249
PO BOX 250, STAR JUNCTION, PA 15482-0250
PO BOX 251, STAR JUNCTION, PA 15482-0251
PO BOX 252, STAR JUNCTION, PA 15482-0252
PO BOX 253, STAR JUNCTION, PA 15482-0253
PO BOX 254, STAR JUNCTION, PA 15482-0254
PO BOX 255, STAR JUNCTION, PA 15482-0255
PO BOX 256, STAR JUNCTION, PA 15482-0256
PO BOX 257, STAR JUNCTION, PA 15482-0257
PO BOX 258, STAR JUNCTION, PA 15482-0258
PO BOX 259, STAR JUNCTION, PA 15482-0259
PO BOX 260, STAR JUNCTION, PA 15482-0260
PO BOX 261, STAR JUNCTION, PA 15482-0261
PO BOX 262, STAR JUNCTION, PA 15482-0262
PO BOX 263, STAR JUNCTION, PA 15482-0263
PO BOX 264, STAR JUNCTION, PA 15482-0264
PO BOX 265, STAR JUNCTION, PA 15482-0265
PO BOX 266, STAR JUNCTION, PA 15482-0266
PO BOX 267, STAR JUNCTION, PA 15482-0267
PO BOX 268, STAR JUNCTION, PA 15482-0268
PO BOX 269, STAR JUNCTION, PA 15482-0269
PO BOX 270, STAR JUNCTION, PA 15482-0270
PO BOX 271, STAR JUNCTION, PA 15482-0271
PO BOX 272, STAR JUNCTION, PA 15482-0272
PO BOX 273, STAR JUNCTION, PA 15482-0273
PO BOX 274, STAR JUNCTION, PA 15482-0274
PO BOX 275, STAR JUNCTION, PA 15482-0275
PO BOX 276, STAR JUNCTION, PA 15482-0276
PO BOX 277, STAR JUNCTION, PA 15482-0277
PO BOX 278, STAR JUNCTION, PA 15482-0278
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