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 200140, DALLAS, TX 75320-0140
PO BOX 200141, DALLAS, TX 75320-0141
PO BOX 200142, DALLAS, TX 75320-0142
PO BOX 200143, DALLAS, TX 75320-0143
PO BOX 200144, DALLAS, TX 75320-0144
PO BOX 200145, DALLAS, TX 75320-0145
PO BOX 200146, DALLAS, TX 75320-0146
PO BOX 200147, DALLAS, TX 75320-0147
PO BOX 200148, DALLAS, TX 75320-0148
PO BOX 200149, DALLAS, TX 75320-0149
PO BOX 200150, DALLAS, TX 75320-0150
PO BOX 200151, DALLAS, TX 75320-0151
PO BOX 200152, DALLAS, TX 75320-0152
PO BOX 200153, DALLAS, TX 75320-0153
PO BOX 200154, DALLAS, TX 75320-0154
PO BOX 200155, DALLAS, TX 75320-0155
PO BOX 200156, DALLAS, TX 75320-0156
PO BOX 200157, DALLAS, TX 75320-0157
PO BOX 200158, DALLAS, TX 75320-0158
PO BOX 200159, DALLAS, TX 75320-0159
PO BOX 200160, DALLAS, TX 75320-0160
PO BOX 200161, DALLAS, TX 75320-0161
PO BOX 200162, DALLAS, TX 75320-0162
PO BOX 200163, DALLAS, TX 75320-0163
PO BOX 200164, DALLAS, TX 75320-0164
PO BOX 200165, DALLAS, TX 75320-0165
PO BOX 200166, DALLAS, TX 75320-0166
PO BOX 200167, DALLAS, TX 75320-0167
PO BOX 200168, DALLAS, TX 75320-0168
PO BOX 200169, DALLAS, TX 75320-0169
PO BOX 200170, DALLAS, TX 75320-0170
PO BOX 200171, DALLAS, TX 75320-0171
PO BOX 200172, DALLAS, TX 75320-0172
PO BOX 200173, DALLAS, TX 75320-0173
PO BOX 200174, DALLAS, TX 75320-0174
PO BOX 200175, DALLAS, TX 75320-0175
PO BOX 200176, DALLAS, TX 75320-0176
PO BOX 200177, DALLAS, TX 75320-0177
PO BOX 200178, DALLAS, TX 75320-0178
PO BOX 200179, DALLAS, TX 75320-0179
PO BOX 200180, DALLAS, TX 75320-0180
PO BOX 200181, DALLAS, TX 75320-0181
PO BOX 200182, DALLAS, TX 75320-0182
PO BOX 200183, DALLAS, TX 75320-0183
PO BOX 200184, DALLAS, TX 75320-0184
PO BOX 200185, DALLAS, TX 75320-0185
PO BOX 200186, DALLAS, TX 75320-0186
PO BOX 200187, DALLAS, TX 75320-0187
PO BOX 200188, DALLAS, TX 75320-0188
PO BOX 200189, DALLAS, TX 75320-0189
PO BOX 200190, DALLAS, TX 75320-0190
PO BOX 200191, DALLAS, TX 75320-0191
PO BOX 200192, DALLAS, TX 75320-0192
PO BOX 200193, DALLAS, TX 75320-0193
PO BOX 200194, DALLAS, TX 75320-0194
PO BOX 200195, DALLAS, TX 75320-0195
PO BOX 200196, DALLAS, TX 75320-0196
PO BOX 200197, DALLAS, TX 75320-0197
PO BOX 200198, DALLAS, TX 75320-0198
PO BOX 200199, DALLAS, TX 75320-0199
PO BOX 200200, DALLAS, TX 75320-0200
PO BOX 200201, DALLAS, TX 75320-0201
PO BOX 200202, DALLAS, TX 75320-0202
PO BOX 200203, DALLAS, TX 75320-0203
PO BOX 200204, DALLAS, TX 75320-0204
PO BOX 200205, DALLAS, TX 75320-0205
PO BOX 200206, DALLAS, TX 75320-0206
PO BOX 200207, DALLAS, TX 75320-0207
PO BOX 200208, DALLAS, TX 75320-0208
PO BOX 200209, DALLAS, TX 75320-0209
PO BOX 200210, DALLAS, TX 75320-0210
PO BOX 200211, DALLAS, TX 75320-0211
PO BOX 200212, DALLAS, TX 75320-0212
PO BOX 200213, DALLAS, TX 75320-0213
PO BOX 200214, DALLAS, TX 75320-0214
PO BOX 200215, DALLAS, TX 75320-0215
PO BOX 200216, DALLAS, TX 75320-0216
PO BOX 200217, DALLAS, TX 75320-0217
PO BOX 200218, DALLAS, TX 75320-0218
PO BOX 200219, DALLAS, TX 75320-0219
PO BOX 200220, DALLAS, TX 75320-0220
PO BOX 200221, DALLAS, TX 75320-0221
PO BOX 200222, DALLAS, TX 75320-0222
PO BOX 200223, DALLAS, TX 75320-0223
PO BOX 200224, DALLAS, TX 75320-0224
PO BOX 200225, DALLAS, TX 75320-0225
PO BOX 200226, DALLAS, TX 75320-0226
PO BOX 200227, DALLAS, TX 75320-0227
PO BOX 200228, DALLAS, TX 75320-0228
PO BOX 200229, DALLAS, TX 75320-0229
PO BOX 200230, DALLAS, TX 75320-0230
PO BOX 200231, DALLAS, TX 75320-0231
PO BOX 200232, DALLAS, TX 75320-0232
PO BOX 200233, DALLAS, TX 75320-0233
PO BOX 200234, DALLAS, TX 75320-0234
PO BOX 200235, DALLAS, TX 75320-0235
PO BOX 200236, DALLAS, TX 75320-0236
PO BOX 200237, DALLAS, TX 75320-0237
PO BOX 200238, DALLAS, TX 75320-0238
PO BOX 200239, DALLAS, TX 75320-0239
PO BOX 200240, DALLAS, TX 75320-0240
PO BOX 200241, DALLAS, TX 75320-0241
PO BOX 200242, DALLAS, TX 75320-0242
PO BOX 200243, DALLAS, TX 75320-0243
PO BOX 200244, DALLAS, TX 75320-0244
PO BOX 200245, DALLAS, TX 75320-0245
PO BOX 200246, DALLAS, TX 75320-0246
PO BOX 200247, DALLAS, TX 75320-0247
PO BOX 200248, DALLAS, TX 75320-0248
PO BOX 200249, DALLAS, TX 75320-0249
PO BOX 200250, DALLAS, TX 75320-0250
PO BOX 200251, DALLAS, TX 75320-0251
PO BOX 200252, DALLAS, TX 75320-0252
PO BOX 200253, DALLAS, TX 75320-0253
PO BOX 200254, DALLAS, TX 75320-0254
PO BOX 200255, DALLAS, TX 75320-0255
PO BOX 200256, DALLAS, TX 75320-0256
PO BOX 200257, DALLAS, TX 75320-0257
PO BOX 200258, DALLAS, TX 75320-0258
PO BOX 200259, DALLAS, TX 75320-0259
PO BOX 200260, DALLAS, TX 75320-0260
PO BOX 200261, DALLAS, TX 75320-0261
PO BOX 200262, DALLAS, TX 75320-0262
PO BOX 200263, DALLAS, TX 75320-0263
PO BOX 200264, DALLAS, TX 75320-0264
PO BOX 200265, DALLAS, TX 75320-0265
PO BOX 200266, DALLAS, TX 75320-0266
PO BOX 200267, DALLAS, TX 75320-0267
PO BOX 200268, DALLAS, TX 75320-0268
PO BOX 200269, DALLAS, TX 75320-0269
PO BOX 200270, DALLAS, TX 75320-0270
PO BOX 200271, DALLAS, TX 75320-0271
PO BOX 200272, DALLAS, TX 75320-0272
PO BOX 200273, DALLAS, TX 75320-0273
PO BOX 200274, DALLAS, TX 75320-0274
PO BOX 200275, DALLAS, TX 75320-0275
PO BOX 200276, DALLAS, TX 75320-0276
PO BOX 200277, DALLAS, TX 75320-0277
PO BOX 200278, DALLAS, TX 75320-0278
PO BOX 200279, DALLAS, TX 75320-0279
PO BOX 200280, DALLAS, TX 75320-0280
PO BOX 200281, DALLAS, TX 75320-0281
PO BOX 200282, DALLAS, TX 75320-0282
PO BOX 200283, DALLAS, TX 75320-0283
PO BOX 200284, DALLAS, TX 75320-0284
PO BOX 200285, DALLAS, TX 75320-0285
PO BOX 200286, DALLAS, TX 75320-0286
PO BOX 200287, DALLAS, TX 75320-0287
PO BOX 200288, DALLAS, TX 75320-0288
PO BOX 200289, DALLAS, TX 75320-0289
PO BOX 200290, DALLAS, TX 75320-0290
PO BOX 200291, DALLAS, TX 75320-0291
PO BOX 200292, DALLAS, TX 75320-0292
PO BOX 200293, DALLAS, TX 75320-0293
PO BOX 200294, DALLAS, TX 75320-0294
PO BOX 200295, DALLAS, TX 75320-0295
PO BOX 200296, DALLAS, TX 75320-0296
PO BOX 200297, DALLAS, TX 75320-0297
PO BOX 200298, DALLAS, TX 75320-0298
PO BOX 200299, DALLAS, TX 75320-0299
PO BOX 200300, DALLAS, TX 75320-0300
PO BOX 200301, DALLAS, TX 75320-0301
PO BOX 200302, DALLAS, TX 75320-0302
PO BOX 200303, DALLAS, TX 75320-0303
PO BOX 200304, DALLAS, TX 75320-0304
PO BOX 200305, DALLAS, TX 75320-0305
PO BOX 200306, DALLAS, TX 75320-0306
PO BOX 200307, DALLAS, TX 75320-0307
PO BOX 200308, DALLAS, TX 75320-0308
PO BOX 200309, DALLAS, TX 75320-0309
PO BOX 200310, DALLAS, TX 75320-0310
PO BOX 200311, DALLAS, TX 75320-0311
PO BOX 200312, DALLAS, TX 75320-0312
PO BOX 200313, DALLAS, TX 75320-0313
PO BOX 200314, DALLAS, TX 75320-0314
PO BOX 200315, DALLAS, TX 75320-0315
PO BOX 200316, DALLAS, TX 75320-0316
PO BOX 200317, DALLAS, TX 75320-0317
PO BOX 200318, DALLAS, TX 75320-0318
PO BOX 200319, DALLAS, TX 75320-0319
PO BOX 200320, DALLAS, TX 75320-0320
PO BOX 200321, DALLAS, TX 75320-0321
PO BOX 200322, DALLAS, TX 75320-0322
PO BOX 200323, DALLAS, TX 75320-0323
PO BOX 200324, DALLAS, TX 75320-0324
PO BOX 200325, DALLAS, TX 75320-0325
PO BOX 200326, DALLAS, TX 75320-0326
PO BOX 200327, DALLAS, TX 75320-0327
PO BOX 200328, DALLAS, TX 75320-0328
PO BOX 200329, DALLAS, TX 75320-0329
PO BOX 200330, DALLAS, TX 75320-0330
PO BOX 200331, DALLAS, TX 75320-0331
PO BOX 200332, DALLAS, TX 75320-0332
PO BOX 200333, DALLAS, TX 75320-0333
PO BOX 200334, DALLAS, TX 75320-0334
PO BOX 200335, DALLAS, TX 75320-0335
PO BOX 200336, DALLAS, TX 75320-0336
PO BOX 200337, DALLAS, TX 75320-0337
PO BOX 200338, DALLAS, TX 75320-0338
PO BOX 200339, DALLAS, TX 75320-0339
PO BOX 200340, DALLAS, TX 75320-0340