621 Area Code
Area code 621 serves Houston, Pasadena, Pearland, League City, The Woodlands and nearby communities in Texas. It has been in service since January 23, 2025, when it was split from 346.
Cities and towns in area code 621
Showing the 40 largest of 46 places with 5,000+ residents.
Got a call from 621?
A 621 number was originally issued in Texas, but that does not prove the caller is there. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.
Questions about area code 621
- Where is area code 621?
- Area code 621 is in Texas. It covers Houston, Pasadena, Pearland, League City, The Woodlands, Sugar Land and 40 more cities and towns.
- What time zone is area code 621?
- Area code 621 is in the Central time zone.
- Is 621 a toll-free number?
- No. 621 is a geographic area code in Texas. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
- Why does 621 share its area with 281, 346, 713 and 832?
- 281, 346, 621, 713 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
- Will area code 621 run out of numbers?
- NANPA's latest forecast projects the 281/346/621/713/832 overlay to exhaust in the second quarter of 2039. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.