หมายเลขตู้ป ณ . ต้องน้อยกว่าหรือมากกว่าสี่หลัก สำหรับตู้ไปรษณีย์กฎทั่วไปคือแต่ละกล่องจะมีรหัส ZIP + 4 ของตัวเอง
ตัวเลขสี่หลักสุดท้ายมักเป็นตัวเลขใดตัวหนึ่งต่อไปนี้:
1. ศูนย์บวกสามหลักสุดท้ายของหมายเลขกล่อง (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. สี่หลักสุดท้ายของหมายเลขกล่อง (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. หากหมายเลขกล่องน้อยกว่าสี่หลักให้มีเลขศูนย์ที่อยู่ข้างหน้าหมายเลขกล่องมากพอเพื่อสร้างตัวเลขสี่หลัก(eg. PO BOX 1, Shreveport LA 71161-0001).
อย่างไรก็ตามไม่มีกฎที่เหมือนกันรหัสไปรษณีย์บวกสี่ใช้สำหรับการอ้างอิงเท่านั้นต้องค้นหารหัส ZIP + 4 ทีละกล่องในเว็บไซต์ทางการของ USPS
PO BOX 13151, ARLINGTON, TX 76094-0151
PO BOX 13152, ARLINGTON, TX 76094-0152
PO BOX 13153, ARLINGTON, TX 76094-0153
PO BOX 13154, ARLINGTON, TX 76094-0154
PO BOX 13155, ARLINGTON, TX 76094-0155
PO BOX 13156, ARLINGTON, TX 76094-0156
PO BOX 13157, ARLINGTON, TX 76094-0157
PO BOX 13158, ARLINGTON, TX 76094-0158
PO BOX 13159, ARLINGTON, TX 76094-0159
PO BOX 13160, ARLINGTON, TX 76094-0160
PO BOX 13161, ARLINGTON, TX 76094-0161
PO BOX 13162, ARLINGTON, TX 76094-0162
PO BOX 13163, ARLINGTON, TX 76094-0163
PO BOX 13164, ARLINGTON, TX 76094-0164
PO BOX 13165, ARLINGTON, TX 76094-0165
PO BOX 13166, ARLINGTON, TX 76094-0166
PO BOX 13167, ARLINGTON, TX 76094-0167
PO BOX 13168, ARLINGTON, TX 76094-0168
PO BOX 13169, ARLINGTON, TX 76094-0169
PO BOX 13170, ARLINGTON, TX 76094-0170
PO BOX 13171, ARLINGTON, TX 76094-0171
PO BOX 13172, ARLINGTON, TX 76094-0172
PO BOX 13173, ARLINGTON, TX 76094-0173
PO BOX 13174, ARLINGTON, TX 76094-0174
PO BOX 13175, ARLINGTON, TX 76094-0175
PO BOX 13176, ARLINGTON, TX 76094-0176
PO BOX 13177, ARLINGTON, TX 76094-0177
PO BOX 13178, ARLINGTON, TX 76094-0178
PO BOX 13179, ARLINGTON, TX 76094-0179
PO BOX 13180, ARLINGTON, TX 76094-0180
PO BOX 13181, ARLINGTON, TX 76094-0181
PO BOX 13182, ARLINGTON, TX 76094-0182
PO BOX 13183, ARLINGTON, TX 76094-0183
PO BOX 13184, ARLINGTON, TX 76094-0184
PO BOX 13185, ARLINGTON, TX 76094-0185
PO BOX 13186, ARLINGTON, TX 76094-0186
PO BOX 13187, ARLINGTON, TX 76094-0187
PO BOX 13188, ARLINGTON, TX 76094-0188
PO BOX 13189, ARLINGTON, TX 76094-0189
PO BOX 13190, ARLINGTON, TX 76094-0190
PO BOX 13191, ARLINGTON, TX 76094-0191
PO BOX 13192, ARLINGTON, TX 76094-0192
PO BOX 13193, ARLINGTON, TX 76094-0193
PO BOX 13194, ARLINGTON, TX 76094-0194
PO BOX 13195, ARLINGTON, TX 76094-0195
PO BOX 13196, ARLINGTON, TX 76094-0196
PO BOX 13197, ARLINGTON, TX 76094-0197
PO BOX 13198, ARLINGTON, TX 76094-0198
PO BOX 13199, ARLINGTON, TX 76094-0199
PO BOX 13200, ARLINGTON, TX 76094-0200
PO BOX 13201, ARLINGTON, TX 76094-0201
PO BOX 13202, ARLINGTON, TX 76094-0202
PO BOX 13203, ARLINGTON, TX 76094-0203
PO BOX 13204, ARLINGTON, TX 76094-0204
PO BOX 13205, ARLINGTON, TX 76094-0205
PO BOX 13206, ARLINGTON, TX 76094-0206
PO BOX 13207, ARLINGTON, TX 76094-0207
PO BOX 13208, ARLINGTON, TX 76094-0208
PO BOX 13209, ARLINGTON, TX 76094-0209
PO BOX 13210, ARLINGTON, TX 76094-0210
PO BOX 13211, ARLINGTON, TX 76094-0211
PO BOX 13212, ARLINGTON, TX 76094-0212
PO BOX 13213, ARLINGTON, TX 76094-0213
PO BOX 13214, ARLINGTON, TX 76094-0214
PO BOX 13215, ARLINGTON, TX 76094-0215
PO BOX 13216, ARLINGTON, TX 76094-0216
PO BOX 13217, ARLINGTON, TX 76094-0217
PO BOX 13218, ARLINGTON, TX 76094-0218
PO BOX 13219, ARLINGTON, TX 76094-0219
PO BOX 13220, ARLINGTON, TX 76094-0220
PO BOX 13221, ARLINGTON, TX 76094-0221
PO BOX 13222, ARLINGTON, TX 76094-0222
PO BOX 13223, ARLINGTON, TX 76094-0223
PO BOX 13224, ARLINGTON, TX 76094-0224
PO BOX 13225, ARLINGTON, TX 76094-0225
PO BOX 13226, ARLINGTON, TX 76094-0226
PO BOX 13227, ARLINGTON, TX 76094-0227
PO BOX 13228, ARLINGTON, TX 76094-0228
PO BOX 13229, ARLINGTON, TX 76094-0229
PO BOX 13230, ARLINGTON, TX 76094-0230
PO BOX 13231, ARLINGTON, TX 76094-0231
PO BOX 13232, ARLINGTON, TX 76094-0232
PO BOX 13233, ARLINGTON, TX 76094-0233
PO BOX 13234, ARLINGTON, TX 76094-0234
PO BOX 13235, ARLINGTON, TX 76094-0235
PO BOX 13236, ARLINGTON, TX 76094-0236
PO BOX 13237, ARLINGTON, TX 76094-0237
PO BOX 13238, ARLINGTON, TX 76094-0238
PO BOX 13239, ARLINGTON, TX 76094-0239
PO BOX 13240, ARLINGTON, TX 76094-0240
PO BOX 13241, ARLINGTON, TX 76094-0241
PO BOX 13242, ARLINGTON, TX 76094-0242
PO BOX 13243, ARLINGTON, TX 76094-0243
PO BOX 13244, ARLINGTON, TX 76094-0244
PO BOX 13245, ARLINGTON, TX 76094-0245
PO BOX 13246, ARLINGTON, TX 76094-0246
PO BOX 13247, ARLINGTON, TX 76094-0247
PO BOX 13248, ARLINGTON, TX 76094-0248
PO BOX 13249, ARLINGTON, TX 76094-0249
PO BOX 13250, ARLINGTON, TX 76094-0250
PO BOX 13251, ARLINGTON, TX 76094-0251
PO BOX 13252, ARLINGTON, TX 76094-0252
PO BOX 13253, ARLINGTON, TX 76094-0253
PO BOX 13254, ARLINGTON, TX 76094-0254
PO BOX 13255, ARLINGTON, TX 76094-0255
PO BOX 13256, ARLINGTON, TX 76094-0256
PO BOX 13257, ARLINGTON, TX 76094-0257
PO BOX 13258, ARLINGTON, TX 76094-0258
PO BOX 13259, ARLINGTON, TX 76094-0259
PO BOX 13260, ARLINGTON, TX 76094-0260
PO BOX 13261, ARLINGTON, TX 76094-0261
PO BOX 13262, ARLINGTON, TX 76094-0262
PO BOX 13263, ARLINGTON, TX 76094-0263
PO BOX 13264, ARLINGTON, TX 76094-0264
PO BOX 13265, ARLINGTON, TX 76094-0265
PO BOX 13266, ARLINGTON, TX 76094-0266
PO BOX 13267, ARLINGTON, TX 76094-0267
PO BOX 13268, ARLINGTON, TX 76094-0268
PO BOX 13269, ARLINGTON, TX 76094-0269
PO BOX 13270, ARLINGTON, TX 76094-0270
PO BOX 13271, ARLINGTON, TX 76094-0271
PO BOX 13272, ARLINGTON, TX 76094-0272
PO BOX 13273, ARLINGTON, TX 76094-0273
PO BOX 13274, ARLINGTON, TX 76094-0274
PO BOX 13275, ARLINGTON, TX 76094-0275
PO BOX 13276, ARLINGTON, TX 76094-0276
PO BOX 13277, ARLINGTON, TX 76094-0277
PO BOX 13278, ARLINGTON, TX 76094-0278
PO BOX 13279, ARLINGTON, TX 76094-0279
PO BOX 13280, ARLINGTON, TX 76094-0280
PO BOX 13281, ARLINGTON, TX 76094-0281
PO BOX 13282, ARLINGTON, TX 76094-0282
PO BOX 13283, ARLINGTON, TX 76094-0283
PO BOX 13284, ARLINGTON, TX 76094-0284
PO BOX 13285, ARLINGTON, TX 76094-0285
PO BOX 13286, ARLINGTON, TX 76094-0286
PO BOX 13287, ARLINGTON, TX 76094-0287
PO BOX 13288, ARLINGTON, TX 76094-0288
PO BOX 13289, ARLINGTON, TX 76094-0289
PO BOX 13290, ARLINGTON, TX 76094-0290
PO BOX 13291, ARLINGTON, TX 76094-0291
PO BOX 13292, ARLINGTON, TX 76094-0292
PO BOX 13293, ARLINGTON, TX 76094-0293
PO BOX 13294, ARLINGTON, TX 76094-0294
PO BOX 13295, ARLINGTON, TX 76094-0295
PO BOX 13296, ARLINGTON, TX 76094-0296
PO BOX 13297, ARLINGTON, TX 76094-0297
PO BOX 13298, ARLINGTON, TX 76094-0298
PO BOX 13299, ARLINGTON, TX 76094-0299
PO BOX 13300, ARLINGTON, TX 76094-0300
แสดงความเห็น