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, POWAY, CA 92074-1141
PO BOX 1142, POWAY, CA 92074-1142
PO BOX 1143, POWAY, CA 92074-1143
PO BOX 1144, POWAY, CA 92074-1144
PO BOX 1145, POWAY, CA 92074-1145
PO BOX 1146, POWAY, CA 92074-1146
PO BOX 1147, POWAY, CA 92074-1147
PO BOX 1148, POWAY, CA 92074-1148
PO BOX 1149, POWAY, CA 92074-1149
PO BOX 1150, POWAY, CA 92074-1150
PO BOX 1151, POWAY, CA 92074-1151
PO BOX 1152, POWAY, CA 92074-1152
PO BOX 1153, POWAY, CA 92074-1153
PO BOX 1154, POWAY, CA 92074-1154
PO BOX 1155, POWAY, CA 92074-1155
PO BOX 1156, POWAY, CA 92074-1156
PO BOX 1157, POWAY, CA 92074-1157
PO BOX 1158, POWAY, CA 92074-1158
PO BOX 1159, POWAY, CA 92074-1159
PO BOX 1160, POWAY, CA 92074-1160
PO BOX 1161, POWAY, CA 92074-1161
PO BOX 1162, POWAY, CA 92074-1162
PO BOX 1163, POWAY, CA 92074-1163
PO BOX 1164, POWAY, CA 92074-1164
PO BOX 1165, POWAY, CA 92074-1165
PO BOX 1166, POWAY, CA 92074-1166
PO BOX 1167, POWAY, CA 92074-1167
PO BOX 1168, POWAY, CA 92074-1168
PO BOX 1169, POWAY, CA 92074-1169
PO BOX 1170, POWAY, CA 92074-1170
PO BOX 1171, POWAY, CA 92074-1171
PO BOX 1172, POWAY, CA 92074-1172
PO BOX 1173, POWAY, CA 92074-1173
PO BOX 1174, POWAY, CA 92074-1174
PO BOX 1175, POWAY, CA 92074-1175
PO BOX 1176, POWAY, CA 92074-1176
PO BOX 1177, POWAY, CA 92074-1177
PO BOX 1178, POWAY, CA 92074-1178
PO BOX 1179, POWAY, CA 92074-1179
PO BOX 1180, POWAY, CA 92074-1180
PO BOX 1181, POWAY, CA 92074-1181
PO BOX 1182, POWAY, CA 92074-1182
PO BOX 1183, POWAY, CA 92074-1183
PO BOX 1184, POWAY, CA 92074-1184
PO BOX 1185, POWAY, CA 92074-1185
PO BOX 1186, POWAY, CA 92074-1186
PO BOX 1187, POWAY, CA 92074-1187
PO BOX 1188, POWAY, CA 92074-1188
PO BOX 1189, POWAY, CA 92074-1189
PO BOX 1190, POWAY, CA 92074-1190
PO BOX 1191, POWAY, CA 92074-1191
PO BOX 1192, POWAY, CA 92074-1192
PO BOX 1193, POWAY, CA 92074-1193
PO BOX 1194, POWAY, CA 92074-1194
PO BOX 1195, POWAY, CA 92074-1195
PO BOX 1196, POWAY, CA 92074-1196
PO BOX 1197, POWAY, CA 92074-1197
PO BOX 1198, POWAY, CA 92074-1198
PO BOX 1199, POWAY, CA 92074-1199
PO BOX 1200, POWAY, CA 92074-1200
PO BOX 1201, POWAY, CA 92074-1201
PO BOX 1202, POWAY, CA 92074-1202
PO BOX 1203, POWAY, CA 92074-1203
PO BOX 1204, POWAY, CA 92074-1204
PO BOX 1205, POWAY, CA 92074-1205
PO BOX 1206, POWAY, CA 92074-1206
PO BOX 1207, POWAY, CA 92074-1207
PO BOX 1208, POWAY, CA 92074-1208
PO BOX 1209, POWAY, CA 92074-1209
PO BOX 1210, POWAY, CA 92074-1210
PO BOX 1211, POWAY, CA 92074-1211
PO BOX 1212, POWAY, CA 92074-1212
PO BOX 1213, POWAY, CA 92074-1213
PO BOX 1214, POWAY, CA 92074-1214
PO BOX 1215, POWAY, CA 92074-1215
PO BOX 1216, POWAY, CA 92074-1216
PO BOX 1217, POWAY, CA 92074-1217
PO BOX 1218, POWAY, CA 92074-1218
PO BOX 1219, POWAY, CA 92074-1219
PO BOX 1220, POWAY, CA 92074-1220
PO BOX 1221, POWAY, CA 92074-1221
PO BOX 1222, POWAY, CA 92074-1222
PO BOX 1223, POWAY, CA 92074-1223
PO BOX 1224, POWAY, CA 92074-1224
PO BOX 1225, POWAY, CA 92074-1225
PO BOX 1226, POWAY, CA 92074-1226
PO BOX 1227, POWAY, CA 92074-1227
PO BOX 1228, POWAY, CA 92074-1228
PO BOX 1229, POWAY, CA 92074-1229
PO BOX 1230, POWAY, CA 92074-1230
PO BOX 1231, POWAY, CA 92074-1231
PO BOX 1232, POWAY, CA 92074-1232
PO BOX 1233, POWAY, CA 92074-1233
PO BOX 1234, POWAY, CA 92074-1234
PO BOX 1235, POWAY, CA 92074-1235
PO BOX 1236, POWAY, CA 92074-1236
PO BOX 1237, POWAY, CA 92074-1237
PO BOX 1238, POWAY, CA 92074-1238
PO BOX 1239, POWAY, CA 92074-1239
PO BOX 1240, POWAY, CA 92074-1240
PO BOX 1241, POWAY, CA 92074-1241
PO BOX 1242, POWAY, CA 92074-1242
PO BOX 1243, POWAY, CA 92074-1243
PO BOX 1244, POWAY, CA 92074-1244
PO BOX 1245, POWAY, CA 92074-1245
PO BOX 1246, POWAY, CA 92074-1246
PO BOX 1247, POWAY, CA 92074-1247
PO BOX 1248, POWAY, CA 92074-1248
PO BOX 1249, POWAY, CA 92074-1249
PO BOX 1250, POWAY, CA 92074-1250
PO BOX 1251, POWAY, CA 92074-1251
PO BOX 1252, POWAY, CA 92074-1252
PO BOX 1253, POWAY, CA 92074-1253
PO BOX 1254, POWAY, CA 92074-1254
PO BOX 1255, POWAY, CA 92074-1255
PO BOX 1256, POWAY, CA 92074-1256
PO BOX 1257, POWAY, CA 92074-1257
PO BOX 1258, POWAY, CA 92074-1258
PO BOX 1259, POWAY, CA 92074-1259
PO BOX 1260, POWAY, CA 92074-1260
PO BOX 1261, POWAY, CA 92074-1261
PO BOX 1262, POWAY, CA 92074-1262
PO BOX 1263, POWAY, CA 92074-1263
PO BOX 1264, POWAY, CA 92074-1264
PO BOX 1265, POWAY, CA 92074-1265
PO BOX 1266, POWAY, CA 92074-1266
PO BOX 1267, POWAY, CA 92074-1267
PO BOX 1268, POWAY, CA 92074-1268
PO BOX 1269, POWAY, CA 92074-1269
PO BOX 1270, POWAY, CA 92074-1270
PO BOX 1271, POWAY, CA 92074-1271
PO BOX 1272, POWAY, CA 92074-1272
PO BOX 1273, POWAY, CA 92074-1273
PO BOX 1274, POWAY, CA 92074-1274
PO BOX 1275, POWAY, CA 92074-1275
PO BOX 1276, POWAY, CA 92074-1276
PO BOX 1277, POWAY, CA 92074-1277
PO BOX 1278, POWAY, CA 92074-1278
PO BOX 1279, POWAY, CA 92074-1279
PO BOX 1280, POWAY, CA 92074-1280
PO BOX 1281, POWAY, CA 92074-1281
PO BOX 1282, POWAY, CA 92074-1282
PO BOX 1283, POWAY, CA 92074-1283
PO BOX 1284, POWAY, CA 92074-1284
PO BOX 1285, POWAY, CA 92074-1285
PO BOX 1286, POWAY, CA 92074-1286
PO BOX 1287, POWAY, CA 92074-1287
PO BOX 1288, POWAY, CA 92074-1288
PO BOX 1289, POWAY, CA 92074-1289
PO BOX 1290, POWAY, CA 92074-1290
PO BOX 1291, POWAY, CA 92074-1291
PO BOX 1292, POWAY, CA 92074-1292
PO BOX 1293, POWAY, CA 92074-1293
PO BOX 1294, POWAY, CA 92074-1294
PO BOX 1295, POWAY, CA 92074-1295
PO BOX 1296, POWAY, CA 92074-1296
PO BOX 1297, POWAY, CA 92074-1297
PO BOX 1298, POWAY, CA 92074-1298
PO BOX 1299, POWAY, CA 92074-1299
PO BOX 1300, POWAY, CA 92074-1300
PO BOX 1301, POWAY, CA 92074-1301
PO BOX 1302, POWAY, CA 92074-1302
PO BOX 1303, POWAY, CA 92074-1303
PO BOX 1304, POWAY, CA 92074-1304
PO BOX 1305, POWAY, CA 92074-1305
PO BOX 1306, POWAY, CA 92074-1306
PO BOX 1307, POWAY, CA 92074-1307
PO BOX 1308, POWAY, CA 92074-1308
PO BOX 1309, POWAY, CA 92074-1309
PO BOX 1310, POWAY, CA 92074-1310
PO BOX 1311, POWAY, CA 92074-1311
PO BOX 1312, POWAY, CA 92074-1312
PO BOX 1313, POWAY, CA 92074-1313
PO BOX 1314, POWAY, CA 92074-1314
PO BOX 1315, POWAY, CA 92074-1315
PO BOX 1316, POWAY, CA 92074-1316
PO BOX 1317, POWAY, CA 92074-1317
PO BOX 1318, POWAY, CA 92074-1318
PO BOX 1319, POWAY, CA 92074-1319
PO BOX 1320, POWAY, CA 92074-1320
PO BOX 1321, POWAY, CA 92074-1321
PO BOX 1322, POWAY, CA 92074-1322
PO BOX 1323, POWAY, CA 92074-1323
PO BOX 1324, POWAY, CA 92074-1324
PO BOX 1325, POWAY, CA 92074-1325
PO BOX 1326, POWAY, CA 92074-1326
PO BOX 1327, POWAY, CA 92074-1327
PO BOX 1328, POWAY, CA 92074-1328
PO BOX 1329, POWAY, CA 92074-1329
PO BOX 1330, POWAY, CA 92074-1330
PO BOX 1331, POWAY, CA 92074-1331
PO BOX 1332, POWAY, CA 92074-1332
PO BOX 1333, POWAY, CA 92074-1333
PO BOX 1334, POWAY, CA 92074-1334
PO BOX 1335, POWAY, CA 92074-1335
PO BOX 1336, POWAY, CA 92074-1336
PO BOX 1337, POWAY, CA 92074-1337
PO BOX 1338, POWAY, CA 92074-1338
PO BOX 1339, POWAY, CA 92074-1339
PO BOX 1340, POWAY, CA 92074-1340
PO BOX 1341, POWAY, CA 92074-1341
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