- Location
- Houston, Texas
- Service began in
- 2025
- Local time zone
- Central time
- Calls inside the area
- Full 10-digit dialling
- Rate centre list
- 45
- Exhaust projection
- 2039
- Country calling prefix
- +1 (United States)
Source: NANPA public reports, including the area code report and the rate-centre report, from a file dated 11/01/2026. The exhaust year comes from the NANPA projections file 2026-1 (April 2026). This site is not an official NANPA site.
Pick up a 621 number
A 621 number comes by one of two routes. With a provider plan, you get a new number that the provider assigns at sign-up out of the numbers it holds in the code. Sellers post numbers they already hold, often with a pattern, and charge a one-time price; afterwards you move the number over to a provider.
Providers, sorted by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers listing local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. That never changes the order: first-year cost decides it. How we make money
Places in the 621 area code
For 621, NANPA lists 45 rate centres. Each one is a local calling area where numbers get assigned:
Westfield, Valley Lodge, Tomball, Sugar Land, Stafford, Spring, Splendora, Smithers Lake, Sheldon, Seabrook, Satsuma, Rosharon, Richmond-rosenberg, Porter Heights, Porter, Pinehurst, Mont Belvieu, Missouri City, Manvel, Liverpool, League City, Langham Creek, La Porte, Kemah, Katy, Humble, Huffman, Houston Suburban, Houston, Highlands, Friendswood, Dickinson, Deer Park, Cypress, Crosby, Cleveland, Channelview, Brookshire, Beach City, Baytown, Barker, Bammel, Arcola, Apollo, Alvin.
Other related area codes
One area, one pool of numbers: 346, 832, 281 and 713. Any of these codes can supply a new number in this area, so ask for the one you want.
More codes in Texas: 945, 726, 737, 432, 325, 430, 682, 979, 936, 469, 361, 956, 830, 940, 254, 972, 210, 903, 409, 806, 817, 915, 512 and 214.
City guides: Guide to Houston area codes.
621 area code questions
What area does area code 621 cover?
In Houston, Texas and around Houston-Pasadena-The Woodlands, TX, the 621 area code rings.
Which country code does a 621 number use?
+1. The North American Numbering Plan covers 621, so from abroad you dial +1 621 plus the 7-digit number.
What time is it in the 621 area code?
The time in 621 is Central.
Who places calls from a 621 number?
Homes, mobiles and local businesses hold numbers in this code, and so do people who fake a local number. The 621 number on your screen shows where the number was assigned, not who the caller is.