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 1131, VALLEY CENTER, CA 92082-1131
PO BOX 1132, VALLEY CENTER, CA 92082-1132
PO BOX 1133, VALLEY CENTER, CA 92082-1133
PO BOX 1134, VALLEY CENTER, CA 92082-1134
PO BOX 1135, VALLEY CENTER, CA 92082-1135
PO BOX 1136, VALLEY CENTER, CA 92082-1136
PO BOX 1137, VALLEY CENTER, CA 92082-1137
PO BOX 1138, VALLEY CENTER, CA 92082-1138
PO BOX 1139, VALLEY CENTER, CA 92082-1139
PO BOX 1140, VALLEY CENTER, CA 92082-1140
PO BOX 1141, VALLEY CENTER, CA 92082-1141
PO BOX 1142, VALLEY CENTER, CA 92082-1142
PO BOX 1143, VALLEY CENTER, CA 92082-1143
PO BOX 1144, VALLEY CENTER, CA 92082-1144
PO BOX 1145, VALLEY CENTER, CA 92082-1145
PO BOX 1146, VALLEY CENTER, CA 92082-1146
PO BOX 1147, VALLEY CENTER, CA 92082-1147
PO BOX 1148, VALLEY CENTER, CA 92082-1148
PO BOX 1149, VALLEY CENTER, CA 92082-1149
PO BOX 1150, VALLEY CENTER, CA 92082-1150
PO BOX 1151, VALLEY CENTER, CA 92082-1151
PO BOX 1152, VALLEY CENTER, CA 92082-1152
PO BOX 1153, VALLEY CENTER, CA 92082-1153
PO BOX 1154, VALLEY CENTER, CA 92082-1154
PO BOX 1155, VALLEY CENTER, CA 92082-1155
PO BOX 1156, VALLEY CENTER, CA 92082-1156
PO BOX 1157, VALLEY CENTER, CA 92082-1157
PO BOX 1158, VALLEY CENTER, CA 92082-1158
PO BOX 1159, VALLEY CENTER, CA 92082-1159
PO BOX 1160, VALLEY CENTER, CA 92082-1160
PO BOX 1161, VALLEY CENTER, CA 92082-1161
PO BOX 1162, VALLEY CENTER, CA 92082-1162
PO BOX 1163, VALLEY CENTER, CA 92082-1163
PO BOX 1164, VALLEY CENTER, CA 92082-1164
PO BOX 1165, VALLEY CENTER, CA 92082-1165
PO BOX 1166, VALLEY CENTER, CA 92082-1166
PO BOX 1167, VALLEY CENTER, CA 92082-1167
PO BOX 1168, VALLEY CENTER, CA 92082-1168
PO BOX 1169, VALLEY CENTER, CA 92082-1169
PO BOX 1170, VALLEY CENTER, CA 92082-1170
PO BOX 1171, VALLEY CENTER, CA 92082-1171
PO BOX 1172, VALLEY CENTER, CA 92082-1172
PO BOX 1173, VALLEY CENTER, CA 92082-1173
PO BOX 1174, VALLEY CENTER, CA 92082-1174
PO BOX 1175, VALLEY CENTER, CA 92082-1175
PO BOX 1176, VALLEY CENTER, CA 92082-1176
PO BOX 1177, VALLEY CENTER, CA 92082-1177
PO BOX 1178, VALLEY CENTER, CA 92082-1178
PO BOX 1179, VALLEY CENTER, CA 92082-1179
PO BOX 1180, VALLEY CENTER, CA 92082-1180
PO BOX 1181, VALLEY CENTER, CA 92082-1181
PO BOX 1182, VALLEY CENTER, CA 92082-1182
PO BOX 1183, VALLEY CENTER, CA 92082-1183
PO BOX 1184, VALLEY CENTER, CA 92082-1184
PO BOX 1185, VALLEY CENTER, CA 92082-1185
PO BOX 1186, VALLEY CENTER, CA 92082-1186
PO BOX 1187, VALLEY CENTER, CA 92082-1187
PO BOX 1188, VALLEY CENTER, CA 92082-1188
PO BOX 1189, VALLEY CENTER, CA 92082-1189
PO BOX 1190, VALLEY CENTER, CA 92082-1190
PO BOX 1191, VALLEY CENTER, CA 92082-1191
PO BOX 1192, VALLEY CENTER, CA 92082-1192
PO BOX 1193, VALLEY CENTER, CA 92082-1193
PO BOX 1194, VALLEY CENTER, CA 92082-1194
PO BOX 1195, VALLEY CENTER, CA 92082-1195
PO BOX 1196, VALLEY CENTER, CA 92082-1196
PO BOX 1197, VALLEY CENTER, CA 92082-1197
PO BOX 1198, VALLEY CENTER, CA 92082-1198
PO BOX 1199, VALLEY CENTER, CA 92082-1199
PO BOX 1200, VALLEY CENTER, CA 92082-1200
PO BOX 1201, VALLEY CENTER, CA 92082-1201
PO BOX 1202, VALLEY CENTER, CA 92082-1202
PO BOX 1203, VALLEY CENTER, CA 92082-1203
PO BOX 1204, VALLEY CENTER, CA 92082-1204
PO BOX 1205, VALLEY CENTER, CA 92082-1205
PO BOX 1206, VALLEY CENTER, CA 92082-1206
PO BOX 1207, VALLEY CENTER, CA 92082-1207
PO BOX 1208, VALLEY CENTER, CA 92082-1208
PO BOX 1209, VALLEY CENTER, CA 92082-1209
PO BOX 1210, VALLEY CENTER, CA 92082-1210
PO BOX 1211, VALLEY CENTER, CA 92082-1211
PO BOX 1212, VALLEY CENTER, CA 92082-1212
PO BOX 1213, VALLEY CENTER, CA 92082-1213
PO BOX 1214, VALLEY CENTER, CA 92082-1214
PO BOX 1215, VALLEY CENTER, CA 92082-1215
PO BOX 1216, VALLEY CENTER, CA 92082-1216
PO BOX 1217, VALLEY CENTER, CA 92082-1217
PO BOX 1218, VALLEY CENTER, CA 92082-1218
PO BOX 1219, VALLEY CENTER, CA 92082-1219
PO BOX 1220, VALLEY CENTER, CA 92082-1220
PO BOX 1221, VALLEY CENTER, CA 92082-1221
PO BOX 1222, VALLEY CENTER, CA 92082-1222
PO BOX 1223, VALLEY CENTER, CA 92082-1223
PO BOX 1224, VALLEY CENTER, CA 92082-1224
PO BOX 1225, VALLEY CENTER, CA 92082-1225
PO BOX 1226, VALLEY CENTER, CA 92082-1226
PO BOX 1227, VALLEY CENTER, CA 92082-1227
PO BOX 1228, VALLEY CENTER, CA 92082-1228
PO BOX 1229, VALLEY CENTER, CA 92082-1229
PO BOX 1230, VALLEY CENTER, CA 92082-1230
PO BOX 1231, VALLEY CENTER, CA 92082-1231
PO BOX 1232, VALLEY CENTER, CA 92082-1232
PO BOX 1233, VALLEY CENTER, CA 92082-1233
PO BOX 1234, VALLEY CENTER, CA 92082-1234
PO BOX 1235, VALLEY CENTER, CA 92082-1235
PO BOX 1236, VALLEY CENTER, CA 92082-1236
PO BOX 1237, VALLEY CENTER, CA 92082-1237
PO BOX 1238, VALLEY CENTER, CA 92082-1238
PO BOX 1239, VALLEY CENTER, CA 92082-1239
PO BOX 1240, VALLEY CENTER, CA 92082-1240
PO BOX 1241, VALLEY CENTER, CA 92082-1241
PO BOX 1242, VALLEY CENTER, CA 92082-1242
PO BOX 1243, VALLEY CENTER, CA 92082-1243
PO BOX 1244, VALLEY CENTER, CA 92082-1244
PO BOX 1245, VALLEY CENTER, CA 92082-1245
PO BOX 1246, VALLEY CENTER, CA 92082-1246
PO BOX 1247, VALLEY CENTER, CA 92082-1247
PO BOX 1248, VALLEY CENTER, CA 92082-1248
PO BOX 1249, VALLEY CENTER, CA 92082-1249
PO BOX 1250, VALLEY CENTER, CA 92082-1250
PO BOX 1251, VALLEY CENTER, CA 92082-1251
PO BOX 1252, VALLEY CENTER, CA 92082-1252
PO BOX 1253, VALLEY CENTER, CA 92082-1253
PO BOX 1254, VALLEY CENTER, CA 92082-1254
PO BOX 1255, VALLEY CENTER, CA 92082-1255
PO BOX 1256, VALLEY CENTER, CA 92082-1256
PO BOX 1257, VALLEY CENTER, CA 92082-1257
PO BOX 1258, VALLEY CENTER, CA 92082-1258
PO BOX 1259, VALLEY CENTER, CA 92082-1259
PO BOX 1260, VALLEY CENTER, CA 92082-1260
PO BOX 1261, VALLEY CENTER, CA 92082-1261
PO BOX 1262, VALLEY CENTER, CA 92082-1262
PO BOX 1263, VALLEY CENTER, CA 92082-1263
PO BOX 1264, VALLEY CENTER, CA 92082-1264
PO BOX 1265, VALLEY CENTER, CA 92082-1265
PO BOX 1266, VALLEY CENTER, CA 92082-1266
PO BOX 1267, VALLEY CENTER, CA 92082-1267
PO BOX 1268, VALLEY CENTER, CA 92082-1268
PO BOX 1269, VALLEY CENTER, CA 92082-1269
PO BOX 1270, VALLEY CENTER, CA 92082-1270
PO BOX 1271, VALLEY CENTER, CA 92082-1271
PO BOX 1272, VALLEY CENTER, CA 92082-1272
PO BOX 1273, VALLEY CENTER, CA 92082-1273
PO BOX 1274, VALLEY CENTER, CA 92082-1274
PO BOX 1275, VALLEY CENTER, CA 92082-1275
PO BOX 1276, VALLEY CENTER, CA 92082-1276
PO BOX 1277, VALLEY CENTER, CA 92082-1277
PO BOX 1278, VALLEY CENTER, CA 92082-1278
PO BOX 1279, VALLEY CENTER, CA 92082-1279
PO BOX 1280, VALLEY CENTER, CA 92082-1280
PO BOX 1281, VALLEY CENTER, CA 92082-1281
PO BOX 1282, VALLEY CENTER, CA 92082-1282
PO BOX 1283, VALLEY CENTER, CA 92082-1283
PO BOX 1284, VALLEY CENTER, CA 92082-1284
PO BOX 1285, VALLEY CENTER, CA 92082-1285
PO BOX 1286, VALLEY CENTER, CA 92082-1286
PO BOX 1287, VALLEY CENTER, CA 92082-1287
PO BOX 1288, VALLEY CENTER, CA 92082-1288
PO BOX 1289, VALLEY CENTER, CA 92082-1289
PO BOX 1290, VALLEY CENTER, CA 92082-1290
PO BOX 1291, VALLEY CENTER, CA 92082-1291
PO BOX 1292, VALLEY CENTER, CA 92082-1292
PO BOX 1293, VALLEY CENTER, CA 92082-1293
PO BOX 1294, VALLEY CENTER, CA 92082-1294
PO BOX 1295, VALLEY CENTER, CA 92082-1295
PO BOX 1296, VALLEY CENTER, CA 92082-1296
PO BOX 1297, VALLEY CENTER, CA 92082-1297
PO BOX 1298, VALLEY CENTER, CA 92082-1298
PO BOX 1299, VALLEY CENTER, CA 92082-1299
PO BOX 1300, VALLEY CENTER, CA 92082-1300
PO BOX 1301, VALLEY CENTER, CA 92082-1301
PO BOX 1302, VALLEY CENTER, CA 92082-1302
PO BOX 1303, VALLEY CENTER, CA 92082-1303
PO BOX 1304, VALLEY CENTER, CA 92082-1304
PO BOX 1305, VALLEY CENTER, CA 92082-1305
PO BOX 1306, VALLEY CENTER, CA 92082-1306
PO BOX 1307, VALLEY CENTER, CA 92082-1307
PO BOX 1308, VALLEY CENTER, CA 92082-1308
PO BOX 1309, VALLEY CENTER, CA 92082-1309
PO BOX 1310, VALLEY CENTER, CA 92082-1310
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