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 1141, ROCKINGHAM, NC 28380-1141
PO BOX 1142, ROCKINGHAM, NC 28380-1142
PO BOX 1143, ROCKINGHAM, NC 28380-1143
PO BOX 1144, ROCKINGHAM, NC 28380-1144
PO BOX 1145, ROCKINGHAM, NC 28380-1145
PO BOX 1146, ROCKINGHAM, NC 28380-1146
PO BOX 1147, ROCKINGHAM, NC 28380-1147
PO BOX 1148, ROCKINGHAM, NC 28380-1148
PO BOX 1149, ROCKINGHAM, NC 28380-1149
PO BOX 1150, ROCKINGHAM, NC 28380-1150
PO BOX 1151, ROCKINGHAM, NC 28380-1151
PO BOX 1152, ROCKINGHAM, NC 28380-1152
PO BOX 1153, ROCKINGHAM, NC 28380-1153
PO BOX 1154, ROCKINGHAM, NC 28380-1154
PO BOX 1155, ROCKINGHAM, NC 28380-1155
PO BOX 1156, ROCKINGHAM, NC 28380-1156
PO BOX 1157, ROCKINGHAM, NC 28380-1157
PO BOX 1158, ROCKINGHAM, NC 28380-1158
PO BOX 1159, ROCKINGHAM, NC 28380-1159
PO BOX 1160, ROCKINGHAM, NC 28380-1160
PO BOX 1161, ROCKINGHAM, NC 28380-1161
PO BOX 1162, ROCKINGHAM, NC 28380-1162
PO BOX 1163, ROCKINGHAM, NC 28380-1163
PO BOX 1164, ROCKINGHAM, NC 28380-1164
PO BOX 1165, ROCKINGHAM, NC 28380-1165
PO BOX 1166, ROCKINGHAM, NC 28380-1166
PO BOX 1167, ROCKINGHAM, NC 28380-1167
PO BOX 1168, ROCKINGHAM, NC 28380-1168
PO BOX 1169, ROCKINGHAM, NC 28380-1169
PO BOX 1170, ROCKINGHAM, NC 28380-1170
PO BOX 1171, ROCKINGHAM, NC 28380-1171
PO BOX 1172, ROCKINGHAM, NC 28380-1172
PO BOX 1173, ROCKINGHAM, NC 28380-1173
PO BOX 1174, ROCKINGHAM, NC 28380-1174
PO BOX 1175, ROCKINGHAM, NC 28380-1175
PO BOX 1176, ROCKINGHAM, NC 28380-1176
PO BOX 1177, ROCKINGHAM, NC 28380-1177
PO BOX 1178, ROCKINGHAM, NC 28380-1178
PO BOX 1179, ROCKINGHAM, NC 28380-1179
PO BOX 1180, ROCKINGHAM, NC 28380-1180
PO BOX 1181, ROCKINGHAM, NC 28380-1181
PO BOX 1182, ROCKINGHAM, NC 28380-1182
PO BOX 1183, ROCKINGHAM, NC 28380-1183
PO BOX 1184, ROCKINGHAM, NC 28380-1184
PO BOX 1185, ROCKINGHAM, NC 28380-1185
PO BOX 1186, ROCKINGHAM, NC 28380-1186
PO BOX 1187, ROCKINGHAM, NC 28380-1187
PO BOX 1188, ROCKINGHAM, NC 28380-1188
PO BOX 1189, ROCKINGHAM, NC 28380-1189
PO BOX 1190, ROCKINGHAM, NC 28380-1190
PO BOX 1191, ROCKINGHAM, NC 28380-1191
PO BOX 1192, ROCKINGHAM, NC 28380-1192
PO BOX 1193, ROCKINGHAM, NC 28380-1193
PO BOX 1194, ROCKINGHAM, NC 28380-1194
PO BOX 1195, ROCKINGHAM, NC 28380-1195
PO BOX 1196, ROCKINGHAM, NC 28380-1196
PO BOX 1197, ROCKINGHAM, NC 28380-1197
PO BOX 1198, ROCKINGHAM, NC 28380-1198
PO BOX 1199, ROCKINGHAM, NC 28380-1199
PO BOX 1200, ROCKINGHAM, NC 28380-1200
PO BOX 1201, ROCKINGHAM, NC 28380-1201
PO BOX 1202, ROCKINGHAM, NC 28380-1202
PO BOX 1203, ROCKINGHAM, NC 28380-1203
PO BOX 1204, ROCKINGHAM, NC 28380-1204
PO BOX 1205, ROCKINGHAM, NC 28380-1205
PO BOX 1206, ROCKINGHAM, NC 28380-1206
PO BOX 1207, ROCKINGHAM, NC 28380-1207
PO BOX 1208, ROCKINGHAM, NC 28380-1208
PO BOX 1209, ROCKINGHAM, NC 28380-1209
PO BOX 1210, ROCKINGHAM, NC 28380-1210
PO BOX 1211, ROCKINGHAM, NC 28380-1211
PO BOX 1212, ROCKINGHAM, NC 28380-1212
PO BOX 1213, ROCKINGHAM, NC 28380-1213
PO BOX 1214, ROCKINGHAM, NC 28380-1214
PO BOX 1215, ROCKINGHAM, NC 28380-1215
PO BOX 1216, ROCKINGHAM, NC 28380-1216
PO BOX 1217, ROCKINGHAM, NC 28380-1217
PO BOX 1218, ROCKINGHAM, NC 28380-1218
PO BOX 1219, ROCKINGHAM, NC 28380-1219
PO BOX 1220, ROCKINGHAM, NC 28380-1220
PO BOX 1221, ROCKINGHAM, NC 28380-1221
PO BOX 1222, ROCKINGHAM, NC 28380-1222
PO BOX 1223, ROCKINGHAM, NC 28380-1223
PO BOX 1224, ROCKINGHAM, NC 28380-1224
PO BOX 1225, ROCKINGHAM, NC 28380-1225
PO BOX 1226, ROCKINGHAM, NC 28380-1226
PO BOX 1227, ROCKINGHAM, NC 28380-1227
PO BOX 1228, ROCKINGHAM, NC 28380-1228
PO BOX 1229, ROCKINGHAM, NC 28380-1229
PO BOX 1230, ROCKINGHAM, NC 28380-1230
PO BOX 1231, ROCKINGHAM, NC 28380-1231
PO BOX 1232, ROCKINGHAM, NC 28380-1232
PO BOX 1233, ROCKINGHAM, NC 28380-1233
PO BOX 1234, ROCKINGHAM, NC 28380-1234
PO BOX 1235, ROCKINGHAM, NC 28380-1235
PO BOX 1236, ROCKINGHAM, NC 28380-1236
PO BOX 1237, ROCKINGHAM, NC 28380-1237
PO BOX 1238, ROCKINGHAM, NC 28380-1238
PO BOX 1239, ROCKINGHAM, NC 28380-1239
PO BOX 1240, ROCKINGHAM, NC 28380-1240
PO BOX 1241, ROCKINGHAM, NC 28380-1241
PO BOX 1242, ROCKINGHAM, NC 28380-1242
PO BOX 1243, ROCKINGHAM, NC 28380-1243
PO BOX 1244, ROCKINGHAM, NC 28380-1244
PO BOX 1245, ROCKINGHAM, NC 28380-1245
PO BOX 1246, ROCKINGHAM, NC 28380-1246
PO BOX 1247, ROCKINGHAM, NC 28380-1247
PO BOX 1248, ROCKINGHAM, NC 28380-1248
PO BOX 1249, ROCKINGHAM, NC 28380-1249
PO BOX 1250, ROCKINGHAM, NC 28380-1250
PO BOX 1251, ROCKINGHAM, NC 28380-1251
PO BOX 1252, ROCKINGHAM, NC 28380-1252
PO BOX 1253, ROCKINGHAM, NC 28380-1253
PO BOX 1254, ROCKINGHAM, NC 28380-1254
PO BOX 1255, ROCKINGHAM, NC 28380-1255
PO BOX 1256, ROCKINGHAM, NC 28380-1256
PO BOX 1257, ROCKINGHAM, NC 28380-1257
PO BOX 1258, ROCKINGHAM, NC 28380-1258
PO BOX 1259, ROCKINGHAM, NC 28380-1259
PO BOX 1260, ROCKINGHAM, NC 28380-1260
PO BOX 1261, ROCKINGHAM, NC 28380-1261
PO BOX 1262, ROCKINGHAM, NC 28380-1262
PO BOX 1263, ROCKINGHAM, NC 28380-1263
PO BOX 1264, ROCKINGHAM, NC 28380-1264
PO BOX 1265, ROCKINGHAM, NC 28380-1265
PO BOX 1266, ROCKINGHAM, NC 28380-1266
PO BOX 1267, ROCKINGHAM, NC 28380-1267
PO BOX 1268, ROCKINGHAM, NC 28380-1268
PO BOX 1269, ROCKINGHAM, NC 28380-1269
PO BOX 1270, ROCKINGHAM, NC 28380-1270
PO BOX 1271, ROCKINGHAM, NC 28380-1271
PO BOX 1272, ROCKINGHAM, NC 28380-1272
PO BOX 1273, ROCKINGHAM, NC 28380-1273
PO BOX 1274, ROCKINGHAM, NC 28380-1274
PO BOX 1275, ROCKINGHAM, NC 28380-1275
PO BOX 1276, ROCKINGHAM, NC 28380-1276
PO BOX 1277, ROCKINGHAM, NC 28380-1277
PO BOX 1278, ROCKINGHAM, NC 28380-1278
PO BOX 1279, ROCKINGHAM, NC 28380-1279
PO BOX 1280, ROCKINGHAM, NC 28380-1280
PO BOX 1281, ROCKINGHAM, NC 28380-1281
PO BOX 1282, ROCKINGHAM, NC 28380-1282
PO BOX 1283, ROCKINGHAM, NC 28380-1283
PO BOX 1284, ROCKINGHAM, NC 28380-1284
PO BOX 1285, ROCKINGHAM, NC 28380-1285
PO BOX 1286, ROCKINGHAM, NC 28380-1286
PO BOX 1287, ROCKINGHAM, NC 28380-1287
PO BOX 1288, ROCKINGHAM, NC 28380-1288
PO BOX 1289, ROCKINGHAM, NC 28380-1289
PO BOX 1290, ROCKINGHAM, NC 28380-1290
PO BOX 1291, ROCKINGHAM, NC 28380-1291
PO BOX 1292, ROCKINGHAM, NC 28380-1292
PO BOX 1293, ROCKINGHAM, NC 28380-1293
PO BOX 1294, ROCKINGHAM, NC 28380-1294
PO BOX 1295, ROCKINGHAM, NC 28380-1295
PO BOX 1296, ROCKINGHAM, NC 28380-1296
PO BOX 1297, ROCKINGHAM, NC 28380-1297
PO BOX 1298, ROCKINGHAM, NC 28380-1298
PO BOX 1299, ROCKINGHAM, NC 28380-1299
PO BOX 1300, ROCKINGHAM, NC 28380-1300
PO BOX 1301, ROCKINGHAM, NC 28380-1301
PO BOX 1302, ROCKINGHAM, NC 28380-1302
PO BOX 1303, ROCKINGHAM, NC 28380-1303
PO BOX 1304, ROCKINGHAM, NC 28380-1304
PO BOX 1305, ROCKINGHAM, NC 28380-1305
PO BOX 1306, ROCKINGHAM, NC 28380-1306
PO BOX 1307, ROCKINGHAM, NC 28380-1307
PO BOX 1308, ROCKINGHAM, NC 28380-1308
PO BOX 1309, ROCKINGHAM, NC 28380-1309
PO BOX 1310, ROCKINGHAM, NC 28380-1310
PO BOX 1311, ROCKINGHAM, NC 28380-1311
PO BOX 1312, ROCKINGHAM, NC 28380-1312
PO BOX 1313, ROCKINGHAM, NC 28380-1313
PO BOX 1314, ROCKINGHAM, NC 28380-1314
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