Prefix Information

The prefix 123 is part of area code 406 serving Billings, Montana.

This exchange contains 10,000 possible phone numbers (406-123-0000 through 406-123-9999).

Browse Numbers in This Prefix

406-123-0000-0999 406-123-1000-1999 406-123-2000-2999 406-123-3000-3999 406-123-4000-4999 406-123-5000-5999 406-123-6000-6999 406-123-7000-7999 406-123-8000-8999 406-123-9000-9999

Sample Numbers

(406) 123-0000 (406) 123-1234 (406) 123-2000 (406) 123-3333 (406) 123-4444 (406) 123-5555 (406) 123-6000 (406) 123-7777 (406) 123-8888 (406) 123-9999