Area code 621
Where is area code 621?
Houston, Spring and Katy, Texas
Local time: … (Central Time)
621 is a newer area code, in service since January 23, 2025, added on top of 281, 346, 713 and 832. See all new area codes.
| State | Texas |
|---|---|
| Country | United States |
| Main cities | Houston, Spring and Katy |
| Time zone | Central Time |
| Overlay area codes | 281, 346, 713 and 832 |
| In service since | 2025 (created from 346) |
| Dialing format | (621) XXX-XXXX · +1 621 XXX XXXX from abroad |
Look up a 621 number
Cities and towns in area code 621
621 is an overlay, so it covers the same places as 281, 346, 713 and 832. Places are listed by how many phone prefixes they have in the area.
- Houston, TX
- Spring, TX
- Katy, TX
- Sugar Land, TX
- Baytown, TX
- Richmond, TX
- Cypress, TX
- Humble, TX
- Dickinson, TX
- Missouri City, TX
- Channelview, TX
- Cleveland, TX
- Deer Park, TX
- Alvin, TX
- Friendswood, TX
- League City, TX
- Magnolia, TX
- La Porte, TX
- Manvel, TX
- Arcola, TX
- Seabrook, TX
- Porter, TX
- New Caney, TX
- Highlands, TX
- Pasadena, TX
- Fulshear, TX
- Huffman, TX
- Montblvieu, TX
- Crosby, TX
- Rosharon, TX
- Liverpool, TX
- Pearland, TX
- Porter Hts, TX
- Tomball, TX
- Brookshire, TX
- Kingwood, TX
- Bacliff, TX
- Xxxxxxxxxx, TX
Area codes that overlay 621
Questions
- Where is area code 621?
- Area code 621 is in Texas. It serves Houston, Spring, Katy, Sugar Land and Baytown and 33 other cities and towns.
- What time zone is area code 621 in?
- Area code 621 uses Central Time.
- What area codes overlay 621?
- 281, 346, 713 and 832 serve the same area as 621. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.
- Is a call from area code 621 a scam?
- The area code alone doesn’t tell you. Most calls from 621 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 621 number, let it go to voicemail.
- When did area code 621 start?
- 621 went into service in 2025. It was created from area code 346.
- Can a 621 number be outside Texas?
- Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 621 caller can be anywhere.
Other area codes in Texas
| Area code | Main cities |
|---|---|
| 210 | San Antonio |
| 214 | Dallas, Grand Prairie and McKinney |
| 254 | Waco, Killeen and Temple |
| 325 | Abilene, San Angelo and Brownwood |
| 361 | Corpus Christi, Victoria and Alice |
| 409 | Beaumont, Galveston and Texas City |
| 430 | Longview, Greenville and Tyler |
| 432 | Odessa, Midland and Big Spring |
| 469 | Grand Prairie, Dallas and Plano |
| 512 | Austin, Georgetown and San Marcos |
| 682 | Arlington, Fort Worth and Weatherford |
| 726 | San Antonio |
| 737 | Austin, Georgetown and Bastrop |
| 806 | Lubbock, Amarillo and Plainview |
| 817 | Fort Worth, Arlington and Hurst |
| 830 | New Braunfels, Del Rio and Seguin |
| 903 | Tyler, Longview and Texarkana |
| 915 | El Paso, Clint and Canutillo |
| 936 | Conroe, Lufkin and Huntsville |
| 940 | Wichita Falls, Denton and Decatur |
| 945 | Grand Prairie, Dallas and Frisco |
| 956 | Laredo, Brownsville and McAllen |
| 972 | Dallas, Grand Prairie and Irving |
| 979 | Bryan, Angleton and Freeport |