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 15134, BRIDGEPORT, CT 06673-5134
PO BOX 15135, BRIDGEPORT, CT 06673-5135
PO BOX 15136, BRIDGEPORT, CT 06673-5136
PO BOX 15137, BRIDGEPORT, CT 06673-5137
PO BOX 15138, BRIDGEPORT, CT 06673-5138
PO BOX 15139, BRIDGEPORT, CT 06673-5139
PO BOX 15140, BRIDGEPORT, CT 06673-5140
PO BOX 15141, BRIDGEPORT, CT 06673-5141
PO BOX 15142, BRIDGEPORT, CT 06673-5142
PO BOX 15143, BRIDGEPORT, CT 06673-5143
PO BOX 15144, BRIDGEPORT, CT 06673-5144
PO BOX 15145, BRIDGEPORT, CT 06673-5145
PO BOX 15146, BRIDGEPORT, CT 06673-5146
PO BOX 15147, BRIDGEPORT, CT 06673-5147
PO BOX 15148, BRIDGEPORT, CT 06673-5148
PO BOX 15149, BRIDGEPORT, CT 06673-5149
PO BOX 15150, BRIDGEPORT, CT 06673-5150
PO BOX 15151, BRIDGEPORT, CT 06673-5151
PO BOX 15152, BRIDGEPORT, CT 06673-5152
PO BOX 15153, BRIDGEPORT, CT 06673-5153
PO BOX 15154, BRIDGEPORT, CT 06673-5154
PO BOX 15155, BRIDGEPORT, CT 06673-5155
PO BOX 15156, BRIDGEPORT, CT 06673-5156
PO BOX 15157, BRIDGEPORT, CT 06673-5157
PO BOX 15158, BRIDGEPORT, CT 06673-5158
PO BOX 15159, BRIDGEPORT, CT 06673-5159
PO BOX 15160, BRIDGEPORT, CT 06673-5160
PO BOX 15161, BRIDGEPORT, CT 06673-5161
PO BOX 15162, BRIDGEPORT, CT 06673-5162
PO BOX 15163, BRIDGEPORT, CT 06673-5163
PO BOX 15164, BRIDGEPORT, CT 06673-5164
PO BOX 15165, BRIDGEPORT, CT 06673-5165
PO BOX 15166, BRIDGEPORT, CT 06673-5166
PO BOX 15167, BRIDGEPORT, CT 06673-5167
PO BOX 15168, BRIDGEPORT, CT 06673-5168
PO BOX 15169, BRIDGEPORT, CT 06673-5169
PO BOX 15170, BRIDGEPORT, CT 06673-5170
PO BOX 15171, BRIDGEPORT, CT 06673-5171
PO BOX 15172, BRIDGEPORT, CT 06673-5172
PO BOX 15173, BRIDGEPORT, CT 06673-5173
PO BOX 15174, BRIDGEPORT, CT 06673-5174
PO BOX 15175, BRIDGEPORT, CT 06673-5175
PO BOX 15176, BRIDGEPORT, CT 06673-5176
PO BOX 15177, BRIDGEPORT, CT 06673-5177
PO BOX 15178, BRIDGEPORT, CT 06673-5178
PO BOX 15179, BRIDGEPORT, CT 06673-5179
PO BOX 15180, BRIDGEPORT, CT 06673-5180
PO BOX 15181, BRIDGEPORT, CT 06673-5181
PO BOX 15182, BRIDGEPORT, CT 06673-5182
PO BOX 15183, BRIDGEPORT, CT 06673-5183
PO BOX 15184, BRIDGEPORT, CT 06673-5184
PO BOX 15185, BRIDGEPORT, CT 06673-5185
PO BOX 15186, BRIDGEPORT, CT 06673-5186
PO BOX 15187, BRIDGEPORT, CT 06673-5187
PO BOX 15188, BRIDGEPORT, CT 06673-5188
PO BOX 15189, BRIDGEPORT, CT 06673-5189
PO BOX 15190, BRIDGEPORT, CT 06673-5190
PO BOX 15191, BRIDGEPORT, CT 06673-5191
PO BOX 15192, BRIDGEPORT, CT 06673-5192
PO BOX 15193, BRIDGEPORT, CT 06673-5193
PO BOX 15194, BRIDGEPORT, CT 06673-5194
PO BOX 15195, BRIDGEPORT, CT 06673-5195
PO BOX 15196, BRIDGEPORT, CT 06673-5196
PO BOX 15197, BRIDGEPORT, CT 06673-5197
PO BOX 15198, BRIDGEPORT, CT 06673-5198
PO BOX 15199, BRIDGEPORT, CT 06673-5199
PO BOX 15200, BRIDGEPORT, CT 06673-5200
PO BOX 15201, BRIDGEPORT, CT 06673-5201
PO BOX 15202, BRIDGEPORT, CT 06673-5202
PO BOX 15203, BRIDGEPORT, CT 06673-5203
PO BOX 15204, BRIDGEPORT, CT 06673-5204
PO BOX 15205, BRIDGEPORT, CT 06673-5205
PO BOX 15206, BRIDGEPORT, CT 06673-5206
PO BOX 15207, BRIDGEPORT, CT 06673-5207
PO BOX 15208, BRIDGEPORT, CT 06673-5208
PO BOX 15209, BRIDGEPORT, CT 06673-5209
PO BOX 15210, BRIDGEPORT, CT 06673-5210
PO BOX 15211, BRIDGEPORT, CT 06673-5211
PO BOX 15212, BRIDGEPORT, CT 06673-5212
PO BOX 15213, BRIDGEPORT, CT 06673-5213
PO BOX 15214, BRIDGEPORT, CT 06673-5214
PO BOX 15215, BRIDGEPORT, CT 06673-5215
PO BOX 15216, BRIDGEPORT, CT 06673-5216
PO BOX 15217, BRIDGEPORT, CT 06673-5217
PO BOX 15218, BRIDGEPORT, CT 06673-5218
PO BOX 15219, BRIDGEPORT, CT 06673-5219
PO BOX 15220, BRIDGEPORT, CT 06673-5220
PO BOX 15221, BRIDGEPORT, CT 06673-5221
PO BOX 15222, BRIDGEPORT, CT 06673-5222
PO BOX 15223, BRIDGEPORT, CT 06673-5223
PO BOX 15224, BRIDGEPORT, CT 06673-5224
PO BOX 15225, BRIDGEPORT, CT 06673-5225
PO BOX 15226, BRIDGEPORT, CT 06673-5226
PO BOX 15227, BRIDGEPORT, CT 06673-5227
PO BOX 15228, BRIDGEPORT, CT 06673-5228
PO BOX 15229, BRIDGEPORT, CT 06673-5229
PO BOX 15230, BRIDGEPORT, CT 06673-5230
PO BOX 15231, BRIDGEPORT, CT 06673-5231
PO BOX 15232, BRIDGEPORT, CT 06673-5232
PO BOX 15233, BRIDGEPORT, CT 06673-5233
PO BOX 15234, BRIDGEPORT, CT 06673-5234
PO BOX 15235, BRIDGEPORT, CT 06673-5235
PO BOX 15236, BRIDGEPORT, CT 06673-5236
PO BOX 15237, BRIDGEPORT, CT 06673-5237
PO BOX 15238, BRIDGEPORT, CT 06673-5238
PO BOX 15239, BRIDGEPORT, CT 06673-5239
PO BOX 15240, BRIDGEPORT, CT 06673-5240
PO BOX 15241, BRIDGEPORT, CT 06673-5241
PO BOX 15242, BRIDGEPORT, CT 06673-5242
PO BOX 15243, BRIDGEPORT, CT 06673-5243
PO BOX 15244, BRIDGEPORT, CT 06673-5244
PO BOX 15245, BRIDGEPORT, CT 06673-5245
PO BOX 15246, BRIDGEPORT, CT 06673-5246
PO BOX 15247, BRIDGEPORT, CT 06673-5247
PO BOX 15248, BRIDGEPORT, CT 06673-5248
PO BOX 15249, BRIDGEPORT, CT 06673-5249
PO BOX 15250, BRIDGEPORT, CT 06673-5250
PO BOX 15251, BRIDGEPORT, CT 06673-5251
PO BOX 15252, BRIDGEPORT, CT 06673-5252
PO BOX 15253, BRIDGEPORT, CT 06673-5253
PO BOX 15254, BRIDGEPORT, CT 06673-5254
PO BOX 15255, BRIDGEPORT, CT 06673-5255
PO BOX 15256, BRIDGEPORT, CT 06673-5256
PO BOX 15257, BRIDGEPORT, CT 06673-5257
PO BOX 15258, BRIDGEPORT, CT 06673-5258
PO BOX 15259, BRIDGEPORT, CT 06673-5259
PO BOX 15260, BRIDGEPORT, CT 06673-5260
PO BOX 15261, BRIDGEPORT, CT 06673-5261
PO BOX 15262, BRIDGEPORT, CT 06673-5262
PO BOX 15263, BRIDGEPORT, CT 06673-5263
PO BOX 15264, BRIDGEPORT, CT 06673-5264
PO BOX 15265, BRIDGEPORT, CT 06673-5265
PO BOX 15266, BRIDGEPORT, CT 06673-5266
PO BOX 15267, BRIDGEPORT, CT 06673-5267
PO BOX 15268, BRIDGEPORT, CT 06673-5268
PO BOX 15269, BRIDGEPORT, CT 06673-5269
PO BOX 15270, BRIDGEPORT, CT 06673-5270
PO BOX 15271, BRIDGEPORT, CT 06673-5271
PO BOX 15272, BRIDGEPORT, CT 06673-5272
PO BOX 15273, BRIDGEPORT, CT 06673-5273
PO BOX 15274, BRIDGEPORT, CT 06673-5274
PO BOX 15275, BRIDGEPORT, CT 06673-5275
PO BOX 15276, BRIDGEPORT, CT 06673-5276
PO BOX 15277, BRIDGEPORT, CT 06673-5277
PO BOX 15278, BRIDGEPORT, CT 06673-5278
PO BOX 15279, BRIDGEPORT, CT 06673-5279
PO BOX 15280, BRIDGEPORT, CT 06673-5280
PO BOX 15281, BRIDGEPORT, CT 06673-5281
PO BOX 15282, BRIDGEPORT, CT 06673-5282
PO BOX 15283, BRIDGEPORT, CT 06673-5283
PO BOX 15284, BRIDGEPORT, CT 06673-5284
PO BOX 15285, BRIDGEPORT, CT 06673-5285
PO BOX 15286, BRIDGEPORT, CT 06673-5286
PO BOX 15287, BRIDGEPORT, CT 06673-5287
PO BOX 15288, BRIDGEPORT, CT 06673-5288
PO BOX 15289, BRIDGEPORT, CT 06673-5289
PO BOX 15290, BRIDGEPORT, CT 06673-5290
PO BOX 15291, BRIDGEPORT, CT 06673-5291
PO BOX 15292, BRIDGEPORT, CT 06673-5292
PO BOX 15293, BRIDGEPORT, CT 06673-5293
PO BOX 15294, BRIDGEPORT, CT 06673-5294
PO BOX 15295, BRIDGEPORT, CT 06673-5295
PO BOX 15296, BRIDGEPORT, CT 06673-5296
PO BOX 15297, BRIDGEPORT, CT 06673-5297
PO BOX 15298, BRIDGEPORT, CT 06673-5298
PO BOX 15299, BRIDGEPORT, CT 06673-5299
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