Area code 621 — Texas
Area code 621 is in Texas and serves Houston area, Houston. Time zone, overlays, counties and ZIP codes.
| Location | Texas (Houston area) |
|---|---|
| Main places | Houston area, Houston |
| State | Texas |
| Status | In service · since 2025 |
| Time zone | Central · |
| Overlay codes | 281713832 Overlays share the same area. Local calls usually need 10-digit dialing. |
| Local dialing | 10 digits |
History
- Overlaid on 713/281/832/346
Counties (approximate)
BrazoriaBrazoria CountyChambers CountyFort BendFort Bend CountyGalvestonGalveston CountyHardin CountyHarrisHarris CountyJeffersonJefferson CountyLiberty CountyOrangeOrange CountyWaller County
ZIP codes in area code 621
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
77001 Houston77002 Houston77003 Houston77004 Houston77005 Houston77006 Houston77007 Houston77008 Houston77009 Houston77010 Houston77011 Houston77012 Houston77013 Houston77014 Houston77015 Houston77016 Houston77017 Houston77018 Houston77019 Houston77020 Houston77021 Houston77022 Houston77023 Houston77024 Houston77025 Houston77026 Houston77027 Houston77028 Houston77029 Houston77030 Houston77031 Houston77032 Houston77033 Houston77034 Houston77035 Houston77036 Houston77037 Houston77038 Houston77039 Houston77040 Houston
Format a 621 number
US numbers are written as (621) 555-0123 or 621-555-0123. From outside the US, dial +1 621 555 0123.
Is a call from 621 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.