Area Code Information
| Area Code: | 400 |
| State: | Unknown |
| Primary City: | Unknown, Unknown |
| Time Zone: | Unknown |
Area code 400 serves the Unknown, Unknown region in Unknown. This area code is in the Unknown time zone.
Browse Prefixes
Click on any prefix to browse phone numbers in that exchange:
400-200
400-201
400-202
400-203
400-204
400-205
400-206
400-207
400-208
400-209
400-210
400-211
400-212
400-213
400-214
400-215
400-216
400-217
400-218
400-219
400-220
400-221
400-222
400-223
400-224
400-225
400-226
400-227
400-228
400-229
Showing sample prefixes. All prefixes from 200-999 are available.