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 1161, MONTEREY, CA 93942-1161
PO BOX 1162, MONTEREY, CA 93942-1162
PO BOX 1163, MONTEREY, CA 93942-1163
PO BOX 1164, MONTEREY, CA 93942-1164
PO BOX 1165, MONTEREY, CA 93942-1165
PO BOX 1166, MONTEREY, CA 93942-1166
PO BOX 1167, MONTEREY, CA 93942-1167
PO BOX 1168, MONTEREY, CA 93942-1168
PO BOX 1169, MONTEREY, CA 93942-1169
PO BOX 1170, MONTEREY, CA 93942-1170
PO BOX 1171, MONTEREY, CA 93942-1171
PO BOX 1172, MONTEREY, CA 93942-1172
PO BOX 1173, MONTEREY, CA 93942-1173
PO BOX 1174, MONTEREY, CA 93942-1174
PO BOX 1175, MONTEREY, CA 93942-1175
PO BOX 1176, MONTEREY, CA 93942-1176
PO BOX 1177, MONTEREY, CA 93942-1177
PO BOX 1178, MONTEREY, CA 93942-1178
PO BOX 1179, MONTEREY, CA 93942-1179
PO BOX 1180, MONTEREY, CA 93942-1180
PO BOX 1181, MONTEREY, CA 93942-1181
PO BOX 1182, MONTEREY, CA 93942-1182
PO BOX 1183, MONTEREY, CA 93942-1183
PO BOX 1184, MONTEREY, CA 93942-1184
PO BOX 1185, MONTEREY, CA 93942-1185
PO BOX 1186, MONTEREY, CA 93942-1186
PO BOX 1187, MONTEREY, CA 93942-1187
PO BOX 1188, MONTEREY, CA 93942-1188
PO BOX 1189, MONTEREY, CA 93942-1189
PO BOX 1190, MONTEREY, CA 93942-1190
PO BOX 1191, MONTEREY, CA 93942-1191
PO BOX 1192, MONTEREY, CA 93942-1192
PO BOX 1193, MONTEREY, CA 93942-1193
PO BOX 1194, MONTEREY, CA 93942-1194
PO BOX 1195, MONTEREY, CA 93942-1195
PO BOX 1196, MONTEREY, CA 93942-1196
PO BOX 1197, MONTEREY, CA 93942-1197
PO BOX 1198, MONTEREY, CA 93942-1198
PO BOX 1199, MONTEREY, CA 93942-1199
PO BOX 1200, MONTEREY, CA 93942-1200
PO BOX 1201, MONTEREY, CA 93942-1201
PO BOX 1202, MONTEREY, CA 93942-1202
PO BOX 1203, MONTEREY, CA 93942-1203
PO BOX 1204, MONTEREY, CA 93942-1204
PO BOX 1205, MONTEREY, CA 93942-1205
PO BOX 1206, MONTEREY, CA 93942-1206
PO BOX 1207, MONTEREY, CA 93942-1207
PO BOX 1208, MONTEREY, CA 93942-1208
PO BOX 1209, MONTEREY, CA 93942-1209
PO BOX 1210, MONTEREY, CA 93942-1210
PO BOX 1211, MONTEREY, CA 93942-1211
PO BOX 1212, MONTEREY, CA 93942-1212
PO BOX 1213, MONTEREY, CA 93942-1213
PO BOX 1214, MONTEREY, CA 93942-1214
PO BOX 1215, MONTEREY, CA 93942-1215
PO BOX 1216, MONTEREY, CA 93942-1216
PO BOX 1217, MONTEREY, CA 93942-1217
PO BOX 1218, MONTEREY, CA 93942-1218
PO BOX 1219, MONTEREY, CA 93942-1219
PO BOX 1220, MONTEREY, CA 93942-1220
PO BOX 1221, MONTEREY, CA 93942-1221
PO BOX 1222, MONTEREY, CA 93942-1222
PO BOX 1223, MONTEREY, CA 93942-1223
PO BOX 1224, MONTEREY, CA 93942-1224
PO BOX 1225, MONTEREY, CA 93942-1225
PO BOX 1226, MONTEREY, CA 93942-1226
PO BOX 1227, MONTEREY, CA 93942-1227
PO BOX 1228, MONTEREY, CA 93942-1228
PO BOX 1229, MONTEREY, CA 93942-1229
PO BOX 1230, MONTEREY, CA 93942-1230
PO BOX 1231, MONTEREY, CA 93942-1231
PO BOX 1232, MONTEREY, CA 93942-1232
PO BOX 1233, MONTEREY, CA 93942-1233
PO BOX 1234, MONTEREY, CA 93942-1234
PO BOX 1235, MONTEREY, CA 93942-1235
PO BOX 1236, MONTEREY, CA 93942-1236
PO BOX 1237, MONTEREY, CA 93942-1237
PO BOX 1238, MONTEREY, CA 93942-1238
PO BOX 1239, MONTEREY, CA 93942-1239
PO BOX 1240, MONTEREY, CA 93942-1240
PO BOX 1241, MONTEREY, CA 93942-1241
PO BOX 1242, MONTEREY, CA 93942-1242
PO BOX 1243, MONTEREY, CA 93942-1243
PO BOX 1244, MONTEREY, CA 93942-1244
PO BOX 1245, MONTEREY, CA 93942-1245
PO BOX 1246, MONTEREY, CA 93942-1246
PO BOX 1247, MONTEREY, CA 93942-1247
PO BOX 1248, MONTEREY, CA 93942-1248
PO BOX 1249, MONTEREY, CA 93942-1249
PO BOX 1250, MONTEREY, CA 93942-1250
PO BOX 1251, MONTEREY, CA 93942-1251
PO BOX 1252, MONTEREY, CA 93942-1252
PO BOX 1253, MONTEREY, CA 93942-1253
PO BOX 1254, MONTEREY, CA 93942-1254
PO BOX 1255, MONTEREY, CA 93942-1255
PO BOX 1256, MONTEREY, CA 93942-1256
PO BOX 1257, MONTEREY, CA 93942-1257
PO BOX 1258, MONTEREY, CA 93942-1258
PO BOX 1259, MONTEREY, CA 93942-1259
PO BOX 1260, MONTEREY, CA 93942-1260
PO BOX 1261, MONTEREY, CA 93942-1261
PO BOX 1262, MONTEREY, CA 93942-1262
PO BOX 1263, MONTEREY, CA 93942-1263
PO BOX 1264, MONTEREY, CA 93942-1264
PO BOX 1265, MONTEREY, CA 93942-1265
PO BOX 1266, MONTEREY, CA 93942-1266
PO BOX 1267, MONTEREY, CA 93942-1267
PO BOX 1268, MONTEREY, CA 93942-1268
PO BOX 1269, MONTEREY, CA 93942-1269
PO BOX 1270, MONTEREY, CA 93942-1270
PO BOX 1271, MONTEREY, CA 93942-1271
PO BOX 1272, MONTEREY, CA 93942-1272
PO BOX 1273, MONTEREY, CA 93942-1273
PO BOX 1274, MONTEREY, CA 93942-1274
PO BOX 1275, MONTEREY, CA 93942-1275
PO BOX 1276, MONTEREY, CA 93942-1276
PO BOX 1277, MONTEREY, CA 93942-1277
PO BOX 1278, MONTEREY, CA 93942-1278
PO BOX 1279, MONTEREY, CA 93942-1279
PO BOX 1280, MONTEREY, CA 93942-1280
PO BOX 1281, MONTEREY, CA 93942-1281
PO BOX 1282, MONTEREY, CA 93942-1282
PO BOX 1283, MONTEREY, CA 93942-1283
PO BOX 1284, MONTEREY, CA 93942-1284
PO BOX 1285, MONTEREY, CA 93942-1285
PO BOX 1286, MONTEREY, CA 93942-1286
PO BOX 1287, MONTEREY, CA 93942-1287
PO BOX 1288, MONTEREY, CA 93942-1288
PO BOX 1289, MONTEREY, CA 93942-1289
PO BOX 1290, MONTEREY, CA 93942-1290
PO BOX 1291, MONTEREY, CA 93942-1291
PO BOX 1292, MONTEREY, CA 93942-1292
PO BOX 1293, MONTEREY, CA 93942-1293
PO BOX 1294, MONTEREY, CA 93942-1294
PO BOX 1295, MONTEREY, CA 93942-1295
PO BOX 1296, MONTEREY, CA 93942-1296
PO BOX 1297, MONTEREY, CA 93942-1297
PO BOX 1298, MONTEREY, CA 93942-1298
PO BOX 1299, MONTEREY, CA 93942-1299
PO BOX 1300, MONTEREY, CA 93942-1300
PO BOX 1301, MONTEREY, CA 93942-1301
PO BOX 1302, MONTEREY, CA 93942-1302
PO BOX 1303, MONTEREY, CA 93942-1303
PO BOX 1304, MONTEREY, CA 93942-1304
PO BOX 1305, MONTEREY, CA 93942-1305
PO BOX 1306, MONTEREY, CA 93942-1306
PO BOX 1307, MONTEREY, CA 93942-1307
PO BOX 1308, MONTEREY, CA 93942-1308
PO BOX 1309, MONTEREY, CA 93942-1309
PO BOX 1310, MONTEREY, CA 93942-1310
PO BOX 1311, MONTEREY, CA 93942-1311
PO BOX 1312, MONTEREY, CA 93942-1312
PO BOX 1313, MONTEREY, CA 93942-1313
PO BOX 1314, MONTEREY, CA 93942-1314
PO BOX 1315, MONTEREY, CA 93942-1315
PO BOX 1316, MONTEREY, CA 93942-1316
PO BOX 1317, MONTEREY, CA 93942-1317
PO BOX 1318, MONTEREY, CA 93942-1318
PO BOX 1319, MONTEREY, CA 93942-1319
PO BOX 1320, MONTEREY, CA 93942-1320
PO BOX 1321, MONTEREY, CA 93942-1321
PO BOX 1322, MONTEREY, CA 93942-1322
PO BOX 1323, MONTEREY, CA 93942-1323
PO BOX 1324, MONTEREY, CA 93942-1324
PO BOX 1325, MONTEREY, CA 93942-1325
PO BOX 1326, MONTEREY, CA 93942-1326
PO BOX 1327, MONTEREY, CA 93942-1327
PO BOX 1328, MONTEREY, CA 93942-1328
PO BOX 1329, MONTEREY, CA 93942-1329
PO BOX 1330, MONTEREY, CA 93942-1330
PO BOX 1331, MONTEREY, CA 93942-1331
PO BOX 1332, MONTEREY, CA 93942-1332
PO BOX 1333, MONTEREY, CA 93942-1333
PO BOX 1334, MONTEREY, CA 93942-1334
PO BOX 1335, MONTEREY, CA 93942-1335
PO BOX 1336, MONTEREY, CA 93942-1336
PO BOX 1337, MONTEREY, CA 93942-1337
PO BOX 1338, MONTEREY, CA 93942-1338
PO BOX 1339, MONTEREY, CA 93942-1339
PO BOX 1340, MONTEREY, CA 93942-1340
PO BOX 1341, MONTEREY, CA 93942-1341
PO BOX 1342, MONTEREY, CA 93942-1342
PO BOX 1343, MONTEREY, CA 93942-1343
PO BOX 1344, MONTEREY, CA 93942-1344
PO BOX 1345, MONTEREY, CA 93942-1345
PO BOX 1346, MONTEREY, CA 93942-1346
PO BOX 1347, MONTEREY, CA 93942-1347
PO BOX 1348, MONTEREY, CA 93942-1348
PO BOX 1349, MONTEREY, CA 93942-1349
PO BOX 1350, MONTEREY, CA 93942-1350
PO BOX 1351, MONTEREY, CA 93942-1351
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