621 area code — Texas geographic
621 is the area code assigned to Texas, in service since January 23, 2025, Central time. Together with 281, 346, 713, 832 it forms the 281/346/621/713/832 overlay. Because of number portability and VoIP, the area code tells you where the number was issued, not where the caller is right now.
Its parent code is 346, which it left in 2025.
Use this page to decode where 621 numbers come from — and remember that spoofing means the screen can lie about everything except your own caution.
The dialing plan is 10D for home-NPA local calls and 10D across codes.
Official projections put exhaust for the 281/346/621/713/832 complex at 2Q 2039.
FAQ
Why am I getting spam calls from 621 numbers?
Scammers spoof real area codes so calls look legitimate. A displayed 621 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 621 number from?
621 is assigned to Texas in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 621 a toll-free number?
No. 621 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.