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 1171, SOUTH GLENS FALLS, NY 12803-1171
PO BOX 1172, SOUTH GLENS FALLS, NY 12803-1172
PO BOX 1173, SOUTH GLENS FALLS, NY 12803-1173
PO BOX 1174, SOUTH GLENS FALLS, NY 12803-1174
PO BOX 1175, SOUTH GLENS FALLS, NY 12803-1175
PO BOX 1176, SOUTH GLENS FALLS, NY 12803-1176
PO BOX 1177, SOUTH GLENS FALLS, NY 12803-1177
PO BOX 1178, SOUTH GLENS FALLS, NY 12803-1178
PO BOX 1179, SOUTH GLENS FALLS, NY 12803-1179
PO BOX 1180, SOUTH GLENS FALLS, NY 12803-1180
PO BOX 1181, SOUTH GLENS FALLS, NY 12803-1181
PO BOX 1182, SOUTH GLENS FALLS, NY 12803-1182
PO BOX 1183, SOUTH GLENS FALLS, NY 12803-1183
PO BOX 1184, SOUTH GLENS FALLS, NY 12803-1184
PO BOX 1185, SOUTH GLENS FALLS, NY 12803-1185
PO BOX 1186, SOUTH GLENS FALLS, NY 12803-1186
PO BOX 1187, SOUTH GLENS FALLS, NY 12803-1187
PO BOX 1188, SOUTH GLENS FALLS, NY 12803-1188
PO BOX 1189, SOUTH GLENS FALLS, NY 12803-1189
PO BOX 1190, SOUTH GLENS FALLS, NY 12803-1190
PO BOX 1191, SOUTH GLENS FALLS, NY 12803-1191
PO BOX 1192, SOUTH GLENS FALLS, NY 12803-1192
PO BOX 1193, SOUTH GLENS FALLS, NY 12803-1193
PO BOX 1194, SOUTH GLENS FALLS, NY 12803-1194
PO BOX 1195, SOUTH GLENS FALLS, NY 12803-1195
PO BOX 1196, SOUTH GLENS FALLS, NY 12803-1196
PO BOX 1197, SOUTH GLENS FALLS, NY 12803-1197
PO BOX 1198, SOUTH GLENS FALLS, NY 12803-1198
PO BOX 1199, SOUTH GLENS FALLS, NY 12803-1199
PO BOX 1200, SOUTH GLENS FALLS, NY 12803-1200
PO BOX 1201, SOUTH GLENS FALLS, NY 12803-1201
PO BOX 1202, SOUTH GLENS FALLS, NY 12803-1202
PO BOX 1203, SOUTH GLENS FALLS, NY 12803-1203
PO BOX 1204, SOUTH GLENS FALLS, NY 12803-1204
PO BOX 1205, SOUTH GLENS FALLS, NY 12803-1205
PO BOX 1206, SOUTH GLENS FALLS, NY 12803-1206
PO BOX 1207, SOUTH GLENS FALLS, NY 12803-1207
PO BOX 1208, SOUTH GLENS FALLS, NY 12803-1208
PO BOX 1209, SOUTH GLENS FALLS, NY 12803-1209
PO BOX 1210, SOUTH GLENS FALLS, NY 12803-1210
PO BOX 1211, SOUTH GLENS FALLS, NY 12803-1211
PO BOX 1212, SOUTH GLENS FALLS, NY 12803-1212
PO BOX 1213, SOUTH GLENS FALLS, NY 12803-1213
PO BOX 1214, SOUTH GLENS FALLS, NY 12803-1214
PO BOX 1215, SOUTH GLENS FALLS, NY 12803-1215
PO BOX 1216, SOUTH GLENS FALLS, NY 12803-1216
PO BOX 1217, SOUTH GLENS FALLS, NY 12803-1217
PO BOX 1218, SOUTH GLENS FALLS, NY 12803-1218
PO BOX 1219, SOUTH GLENS FALLS, NY 12803-1219
PO BOX 1220, SOUTH GLENS FALLS, NY 12803-1220
PO BOX 1221, SOUTH GLENS FALLS, NY 12803-1221
PO BOX 1222, SOUTH GLENS FALLS, NY 12803-1222
PO BOX 1223, SOUTH GLENS FALLS, NY 12803-1223
PO BOX 1224, SOUTH GLENS FALLS, NY 12803-1224
PO BOX 1225, SOUTH GLENS FALLS, NY 12803-1225
PO BOX 1226, SOUTH GLENS FALLS, NY 12803-1226
PO BOX 1227, SOUTH GLENS FALLS, NY 12803-1227
PO BOX 1228, SOUTH GLENS FALLS, NY 12803-1228
PO BOX 1229, SOUTH GLENS FALLS, NY 12803-1229
PO BOX 1230, SOUTH GLENS FALLS, NY 12803-1230
PO BOX 1231, SOUTH GLENS FALLS, NY 12803-1231
PO BOX 1232, SOUTH GLENS FALLS, NY 12803-1232
PO BOX 1233, SOUTH GLENS FALLS, NY 12803-1233
PO BOX 1234, SOUTH GLENS FALLS, NY 12803-1234
PO BOX 1235, SOUTH GLENS FALLS, NY 12803-1235
PO BOX 1236, SOUTH GLENS FALLS, NY 12803-1236
PO BOX 1237, SOUTH GLENS FALLS, NY 12803-1237
PO BOX 1238, SOUTH GLENS FALLS, NY 12803-1238
PO BOX 1239, SOUTH GLENS FALLS, NY 12803-1239
PO BOX 1240, SOUTH GLENS FALLS, NY 12803-1240
PO BOX 1241, SOUTH GLENS FALLS, NY 12803-1241
PO BOX 1242, SOUTH GLENS FALLS, NY 12803-1242
PO BOX 1243, SOUTH GLENS FALLS, NY 12803-1243
PO BOX 1244, SOUTH GLENS FALLS, NY 12803-1244
PO BOX 1245, SOUTH GLENS FALLS, NY 12803-1245
PO BOX 1246, SOUTH GLENS FALLS, NY 12803-1246
PO BOX 1247, SOUTH GLENS FALLS, NY 12803-1247
PO BOX 1248, SOUTH GLENS FALLS, NY 12803-1248
PO BOX 1249, SOUTH GLENS FALLS, NY 12803-1249
PO BOX 1250, SOUTH GLENS FALLS, NY 12803-1250
PO BOX 1251, SOUTH GLENS FALLS, NY 12803-1251
PO BOX 1252, SOUTH GLENS FALLS, NY 12803-1252
PO BOX 1253, SOUTH GLENS FALLS, NY 12803-1253
PO BOX 1254, SOUTH GLENS FALLS, NY 12803-1254
PO BOX 1255, SOUTH GLENS FALLS, NY 12803-1255
PO BOX 1256, SOUTH GLENS FALLS, NY 12803-1256
PO BOX 1257, SOUTH GLENS FALLS, NY 12803-1257
PO BOX 1258, SOUTH GLENS FALLS, NY 12803-1258
PO BOX 1259, SOUTH GLENS FALLS, NY 12803-1259
PO BOX 1260, SOUTH GLENS FALLS, NY 12803-1260
PO BOX 1261, SOUTH GLENS FALLS, NY 12803-1261
PO BOX 1262, SOUTH GLENS FALLS, NY 12803-1262
PO BOX 1263, SOUTH GLENS FALLS, NY 12803-1263
PO BOX 1264, SOUTH GLENS FALLS, NY 12803-1264
PO BOX 1265, SOUTH GLENS FALLS, NY 12803-1265
PO BOX 1266, SOUTH GLENS FALLS, NY 12803-1266
PO BOX 1267, SOUTH GLENS FALLS, NY 12803-1267
PO BOX 1268, SOUTH GLENS FALLS, NY 12803-1268
PO BOX 1269, SOUTH GLENS FALLS, NY 12803-1269
PO BOX 1270, SOUTH GLENS FALLS, NY 12803-1270
PO BOX 1271, SOUTH GLENS FALLS, NY 12803-1271
PO BOX 1272, SOUTH GLENS FALLS, NY 12803-1272
PO BOX 1273, SOUTH GLENS FALLS, NY 12803-1273
PO BOX 1274, SOUTH GLENS FALLS, NY 12803-1274
PO BOX 1275, SOUTH GLENS FALLS, NY 12803-1275
PO BOX 1276, SOUTH GLENS FALLS, NY 12803-1276
PO BOX 1277, SOUTH GLENS FALLS, NY 12803-1277
PO BOX 1278, SOUTH GLENS FALLS, NY 12803-1278
PO BOX 1279, SOUTH GLENS FALLS, NY 12803-1279
PO BOX 1280, SOUTH GLENS FALLS, NY 12803-1280
PO BOX 1281, SOUTH GLENS FALLS, NY 12803-1281
PO BOX 1282, SOUTH GLENS FALLS, NY 12803-1282
PO BOX 1283, SOUTH GLENS FALLS, NY 12803-1283
PO BOX 1284, SOUTH GLENS FALLS, NY 12803-1284
PO BOX 1285, SOUTH GLENS FALLS, NY 12803-1285
PO BOX 1286, SOUTH GLENS FALLS, NY 12803-1286
PO BOX 1287, SOUTH GLENS FALLS, NY 12803-1287
PO BOX 1288, SOUTH GLENS FALLS, NY 12803-1288
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