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, NEW YORK, NY 10163-1141
PO BOX 1142, NEW YORK, NY 10163-1142
PO BOX 1143, NEW YORK, NY 10163-1143
PO BOX 1144, NEW YORK, NY 10163-1144
PO BOX 1145, NEW YORK, NY 10163-1145
PO BOX 1146, NEW YORK, NY 10163-1146
PO BOX 1147, NEW YORK, NY 10163-1147
PO BOX 1148, NEW YORK, NY 10163-1148
PO BOX 1149, NEW YORK, NY 10163-1149
PO BOX 1150, NEW YORK, NY 10163-1150
PO BOX 1151, NEW YORK, NY 10163-1151
PO BOX 1152, NEW YORK, NY 10163-1152
PO BOX 1153, NEW YORK, NY 10163-1153
PO BOX 1154, NEW YORK, NY 10163-1154
PO BOX 1155, NEW YORK, NY 10163-1155
PO BOX 1156, NEW YORK, NY 10163-1156
PO BOX 1157, NEW YORK, NY 10163-1157
PO BOX 1158, NEW YORK, NY 10163-1158
PO BOX 1159, NEW YORK, NY 10163-1159
PO BOX 1160, NEW YORK, NY 10163-1160
PO BOX 1161, NEW YORK, NY 10163-1161
PO BOX 1162, NEW YORK, NY 10163-1162
PO BOX 1163, NEW YORK, NY 10163-1163
PO BOX 1164, NEW YORK, NY 10163-1164
PO BOX 1165, NEW YORK, NY 10163-1165
PO BOX 1166, NEW YORK, NY 10163-1166
PO BOX 1167, NEW YORK, NY 10163-1167
PO BOX 1168, NEW YORK, NY 10163-1168
PO BOX 1169, NEW YORK, NY 10163-1169
PO BOX 1170, NEW YORK, NY 10163-1170
PO BOX 1171, NEW YORK, NY 10163-1171
PO BOX 1172, NEW YORK, NY 10163-1172
PO BOX 1173, NEW YORK, NY 10163-1173
PO BOX 1174, NEW YORK, NY 10163-1174
PO BOX 1175, NEW YORK, NY 10163-1175
PO BOX 1176, NEW YORK, NY 10163-1176
PO BOX 1177, NEW YORK, NY 10163-1177
PO BOX 1178, NEW YORK, NY 10163-1178
PO BOX 1179, NEW YORK, NY 10163-1179
PO BOX 1180, NEW YORK, NY 10163-1180
PO BOX 1181, NEW YORK, NY 10163-1181
PO BOX 1182, NEW YORK, NY 10163-1182
PO BOX 1183, NEW YORK, NY 10163-1183
PO BOX 1184, NEW YORK, NY 10163-1184
PO BOX 1185, NEW YORK, NY 10163-1185
PO BOX 1186, NEW YORK, NY 10163-1186
PO BOX 1187, NEW YORK, NY 10163-1187
PO BOX 1188, NEW YORK, NY 10163-1188
PO BOX 1189, NEW YORK, NY 10163-1189
PO BOX 1190, NEW YORK, NY 10163-1190
PO BOX 1191, NEW YORK, NY 10163-1191
PO BOX 1192, NEW YORK, NY 10163-1192
PO BOX 1193, NEW YORK, NY 10163-1193
PO BOX 1194, NEW YORK, NY 10163-1194
PO BOX 1195, NEW YORK, NY 10163-1195
PO BOX 1196, NEW YORK, NY 10163-1196
PO BOX 1197, NEW YORK, NY 10163-1197
PO BOX 1198, NEW YORK, NY 10163-1198
PO BOX 1199, NEW YORK, NY 10163-1199
PO BOX 1200, NEW YORK, NY 10163-1200
PO BOX 1201, NEW YORK, NY 10163-1201
PO BOX 1202, NEW YORK, NY 10163-1202
PO BOX 1203, NEW YORK, NY 10163-1203
PO BOX 1204, NEW YORK, NY 10163-1204
PO BOX 1205, NEW YORK, NY 10163-1205
PO BOX 1206, NEW YORK, NY 10163-1206
PO BOX 1207, NEW YORK, NY 10163-1207
PO BOX 1208, NEW YORK, NY 10163-1208
PO BOX 1209, NEW YORK, NY 10163-1209
PO BOX 1210, NEW YORK, NY 10163-1210
PO BOX 1211, NEW YORK, NY 10163-1211
PO BOX 1212, NEW YORK, NY 10163-1212
PO BOX 1213, NEW YORK, NY 10163-1213
PO BOX 1214, NEW YORK, NY 10163-1214
PO BOX 1215, NEW YORK, NY 10163-1215
PO BOX 1216, NEW YORK, NY 10163-1216
PO BOX 1217, NEW YORK, NY 10163-1217
PO BOX 1218, NEW YORK, NY 10163-1218
PO BOX 1219, NEW YORK, NY 10163-1219
PO BOX 1220, NEW YORK, NY 10163-1220
PO BOX 1221, NEW YORK, NY 10163-1221
PO BOX 1222, NEW YORK, NY 10163-1222
PO BOX 1223, NEW YORK, NY 10163-1223
PO BOX 1224, NEW YORK, NY 10163-1224
PO BOX 1225, NEW YORK, NY 10163-1225
PO BOX 1226, NEW YORK, NY 10163-1226
PO BOX 1227, NEW YORK, NY 10163-1227
PO BOX 1228, NEW YORK, NY 10163-1228
PO BOX 1229, NEW YORK, NY 10163-1229
PO BOX 1230, NEW YORK, NY 10163-1230
PO BOX 1231, NEW YORK, NY 10163-1231
PO BOX 1232, NEW YORK, NY 10163-1232
PO BOX 1233, NEW YORK, NY 10163-1233
PO BOX 1234, NEW YORK, NY 10163-1234
PO BOX 1235, NEW YORK, NY 10163-1235
PO BOX 1236, NEW YORK, NY 10163-1236
PO BOX 1237, NEW YORK, NY 10163-1237
PO BOX 1238, NEW YORK, NY 10163-1238
PO BOX 1239, NEW YORK, NY 10163-1239
PO BOX 1240, NEW YORK, NY 10163-1240
PO BOX 1241, NEW YORK, NY 10163-1241
PO BOX 1242, NEW YORK, NY 10163-1242
PO BOX 1243, NEW YORK, NY 10163-1243
PO BOX 1244, NEW YORK, NY 10163-1244
PO BOX 1245, NEW YORK, NY 10163-1245
PO BOX 1246, NEW YORK, NY 10163-1246
PO BOX 1247, NEW YORK, NY 10163-1247
PO BOX 1248, NEW YORK, NY 10163-1248
PO BOX 1249, NEW YORK, NY 10163-1249
PO BOX 1250, NEW YORK, NY 10163-1250
PO BOX 1251, NEW YORK, NY 10163-1251
PO BOX 1252, NEW YORK, NY 10163-1252
PO BOX 1253, NEW YORK, NY 10163-1253
PO BOX 1254, NEW YORK, NY 10163-1254
PO BOX 1255, NEW YORK, NY 10163-1255
PO BOX 1256, NEW YORK, NY 10163-1256
PO BOX 1257, NEW YORK, NY 10163-1257
PO BOX 1258, NEW YORK, NY 10163-1258
PO BOX 1259, NEW YORK, NY 10163-1259
PO BOX 1260, NEW YORK, NY 10163-1260
PO BOX 1261, NEW YORK, NY 10163-1261
PO BOX 1262, NEW YORK, NY 10163-1262
PO BOX 1263, NEW YORK, NY 10163-1263
PO BOX 1264, NEW YORK, NY 10163-1264
PO BOX 1265, NEW YORK, NY 10163-1265
PO BOX 1266, NEW YORK, NY 10163-1266
PO BOX 1267, NEW YORK, NY 10163-1267
PO BOX 1268, NEW YORK, NY 10163-1268
PO BOX 1269, NEW YORK, NY 10163-1269
PO BOX 1270, NEW YORK, NY 10163-1270
PO BOX 1271, NEW YORK, NY 10163-1271
PO BOX 1272, NEW YORK, NY 10163-1272
PO BOX 1273, NEW YORK, NY 10163-1273
PO BOX 1274, NEW YORK, NY 10163-1274
PO BOX 1275, NEW YORK, NY 10163-1275
PO BOX 1276, NEW YORK, NY 10163-1276
PO BOX 1277, NEW YORK, NY 10163-1277
PO BOX 1278, NEW YORK, NY 10163-1278
PO BOX 1279, NEW YORK, NY 10163-1279
PO BOX 1280, NEW YORK, NY 10163-1280
PO BOX 1281, NEW YORK, NY 10163-1281
PO BOX 1282, NEW YORK, NY 10163-1282
PO BOX 1283, NEW YORK, NY 10163-1283
PO BOX 1284, NEW YORK, NY 10163-1284
PO BOX 1285, NEW YORK, NY 10163-1285
PO BOX 1286, NEW YORK, NY 10163-1286
PO BOX 1287, NEW YORK, NY 10163-1287
PO BOX 1288, NEW YORK, NY 10163-1288
PO BOX 1289, NEW YORK, NY 10163-1289
PO BOX 1290, NEW YORK, NY 10163-1290
PO BOX 1291, NEW YORK, NY 10163-1291
PO BOX 1292, NEW YORK, NY 10163-1292
PO BOX 1293, NEW YORK, NY 10163-1293
PO BOX 1294, NEW YORK, NY 10163-1294
PO BOX 1295, NEW YORK, NY 10163-1295
PO BOX 1296, NEW YORK, NY 10163-1296
PO BOX 1297, NEW YORK, NY 10163-1297
PO BOX 1298, NEW YORK, NY 10163-1298
PO BOX 1299, NEW YORK, NY 10163-1299
PO BOX 1300, NEW YORK, NY 10163-1300
PO BOX 1301, NEW YORK, NY 10163-1301
PO BOX 1302, NEW YORK, NY 10163-1302
PO BOX 1303, NEW YORK, NY 10163-1303
PO BOX 1304, NEW YORK, NY 10163-1304
PO BOX 1305, NEW YORK, NY 10163-1305
PO BOX 1306, NEW YORK, NY 10163-1306
PO BOX 1307, NEW YORK, NY 10163-1307
PO BOX 1308, NEW YORK, NY 10163-1308
PO BOX 1309, NEW YORK, NY 10163-1309
PO BOX 1310, NEW YORK, NY 10163-1310
PO BOX 1311, NEW YORK, NY 10163-1311
PO BOX 1312, NEW YORK, NY 10163-1312
PO BOX 1313, NEW YORK, NY 10163-1313
PO BOX 1314, NEW YORK, NY 10163-1314
PO BOX 1315, NEW YORK, NY 10163-1315
PO BOX 1316, NEW YORK, NY 10163-1316
PO BOX 1317, NEW YORK, NY 10163-1317
PO BOX 1318, NEW YORK, NY 10163-1318
PO BOX 1319, NEW YORK, NY 10163-1319
PO BOX 1320, NEW YORK, NY 10163-1320
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