Area code 737 – Texas
737 has served Texas since 2013, split from 512. 333 of its 786 number blocks are allocated (42%). No carrier dominates: Other CLEC / VoIP 27.9%, Onvoy / Inteliquent 24.6%, AT&T 13.2%. It shares its geography with overlay codes 512, so local calls take all ten digits. FTC complaints naming a 737 caller ID totalled 568 in the 33 days to 30 October 2026 (186th of 422 ranked codes). The dominant complaint type is “Other”.
Who holds 737 number blocks
Share of the 333 assigned NXX blocks (42.4% of the 786 possible), across 45 carriers. This is share of number blocks, not of subscribers.
- Onvoy24.6%
- Other CLEC / VoIP24.3%
- AT&T13.2%
- T-Mobile11.7%
- Verizon9.6%
- Bandwidth6.3%
- Charter2.7%
- Lumen1.5%
- Peerless1.2%
- Dish1.2%
- Vonage0.9%
- VoIP Innovations0.6%
- Twilio0.6%
- Windstream0.3%
- Comcast0.3%
- Telnyx0.3%
- 8x80.3%
- TPx0.3%
Spam complaints naming 737
FTC Do Not Call complaints where the caller ID was a 737 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 737
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 35.
Timeline
- 2013 737 goes into service, split from or overlaid on 512.
More about 737
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 737
What state is area code 737?
Texas. It covers the same area as 512/737.
Is a call from 737 a scam?
Not by itself. 737 drew 568 FTC complaints in the 33 days to 30 October 2026, 186th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number. The most reported category here is “Other”.
Which carrier owns 737 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 27.9%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 737?
Yes – ten digits for local calls in 737, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.