Area Code 378
Area Code 378 Assignment
Area Code 378 History:
Area Code 378 has not been assigned for use by the North American Numbering Plan Administrator. Area Code 378 has been officially set aside by the North American Numbering Plan Administrator for future unanticipated purposes where it may be important to have available 10 contiguous area codes.
The ten area codes in this reserved block are 370, 371, 372, 373, 374, 375, 376, 377, 378 and 379.
If you receive a phone call from area code 378 it is a spam call. Any phone number such as 378-xxx-xxx does not exist.