737 Area Code: Austin, Texas
Area code 737 serves Austin, Georgetown and Bastrop, Texas in the Central time zone, in service since 2013. Consumers have filed 1,964 unwanted-call complaints against 1,636 different 737 numbers, 342 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 737 at a glance
- State
- Texas
- Main cities
- Austin, Georgetown, Bastrop, San Marcos, Kyle, Leander + 27 more
- Counties
- Travis County, Williamson County, Hays County, Bastrop County + 5 more
- Local time
- —Central
- In service since
- July 1, 2013
- Overlay of
- 512
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 35 rate centers, 333 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Reported 737 numbers
No single 737 number has enough complaints yet for a full report page, so none are listed. Look up the exact number that called you: the lookup works on every US number, whether or not it has complaint history.
What calls from 737 numbers are about
833 FTC Do Not Call complaints about 737 numbers since Jul 24. The most common named subject is debt-relief pitches, at 22% of complaints (86% of those were recorded messages). Overall, 66% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified36143%
- Debt reduction18022%
- Impostor (government, business, family)8310%
- Dropped call / no message739%
- No subject given445%
- Medical & prescriptions283%
- Home improvement & cleaning223%
FCC complaints by call type, last 2 years
- Text Message8338%
- Prerecorded Voice8036%
- Live Voice5726%
38% of recent FCC complaints about 737 numbers are about text messages, not calls.
When 737 spam calls come in
30% of complaints that give a call time describe calls between 10am and 1pm. 93% came Monday to Friday, most on Wednesdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
355 FTC complaints about 737 numbers in the last four weeks, up 30% on the four weeks before. FCC complaints about 737 numbers peaked in 2016 (116); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
Only 48% of the FTC complaints about 737 numbers came from Texas residents; the most came from California, Florida and Virginia. 737 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Where complainants live
- Texas40048%
- California587%
- Florida425%
- Virginia273%
- North Carolina213%
What people with 737 numbers report
People whose own number starts with 737 filed 197 FTC complaints since Jul 24. 51% were about calls showing another 737 number. The most common named subject was impostor calls (people pretending to be a government agency, a business or family).
Area codes on the calls they reported
- 737 (same code)10051%
- 855 (toll-free)63%
- 51263%
- 866 (toll-free)53%
- 36153%
Likely campaigns using 737 numbers
Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.
Busiest 737 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (737) 497-xxxx | 14 | 14 | Onvoy (Sinch) | Austin |
| (737) 417-xxxx | 13 | 12 | Ip Horizon LLC | Liberty Hill |
| (737) 416-xxxx | 12 | 12 | Ip Horizon LLC | Elgin |
| (737) 250-xxxx | 11 | 11 | Onvoy (Sinch) | Martindale |
| (737) 225-xxxx | 10 | 8 | Metro by T-Mobile (MetroPCS) | Rockdale |
Carriers operating in 737
NANPA has assigned 333 737 prefixes (NPA-NXX central-office codes) across 35 rate centers: 30% to wireless carriers, 66% to landline and VoIP operators; 100% are pooled blocks shared by several carriers. 22 prefixes were assigned in the last 12 months (newest 2026-10-20). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 82(25%) | 28 | 2026-10-20 |
| T-Mobile USA | Wireless | 33(10%) | 11 | 2026-06-16 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 29(9%) | 9 | 2026-05-28 |
| Verizon Wireless (Cellco Partnership) | Wireless | 28(8%) | 5 | 2025-12-03 |
| Fractel, LLC | Competitive / VoIP (CLEC) | 26(8%) | 17 | 2021-12-30 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 21(6%) | 12 | 2024-07-10 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 14(4%) | 3 | 2026-09-21 |
| Ton80 Communications, LLC | Competitive / VoIP (CLEC) | 9(3%) | 8 | 2022-01-26 |
| Commio, LLC | Competitive / VoIP (CLEC) | 7(2%) | 4 | 2023-12-21 |
| Foremost Telecommunications Corporation | Competitive / VoIP (CLEC) | 7(2%) | 6 | 2013-08-13 |
| Metro by T-Mobile (MetroPCS) | Wireless | 6(2%) | 6 | 2026-05-18 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 6(2%) | 4 | 2025-01-29 |
Largest rate centers (exchanges) by prefixes: Austin (155), Georgetown (21), Bastrop (19), San Marcos (13), Kyle (10), Leander (10), Elgin (9), Taylor (8), Buda (7), Lampasas (6). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 737 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 737 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in Texas
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: Texas Attorney General.
- Texas is one of the states that maintains its own Do Not Call registry alongside the federal National Do Not Call Registry, so telemarketers calling Texas numbers are expected to check both lists. Registering on the federal list at donotcall.gov is free and never expires; the state list is administered separately and may have its own registration process and renewal period.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 737: questions answered from the data
Where is area code 737?
Area code 737 serves Austin, Georgetown and Bastrop, Texas, covering Travis County, Williamson County and Hays County and 6 more counties. It has been in service since July 1, 2013.
What time zone is area code 737 in?
Area code 737 is in the Central time zone (UTC−6, or UTC−5 during daylight saving time). The current local time is shown at the top of this page.
What are calls from 737 numbers usually about?
Since Jul 24, consumers filed 833 FTC Do Not Call complaints about 737 numbers. The most common named subject was debt-relief pitches: 22% of complaints, 86% of them recorded messages. Across all subjects, 66% of callers who answered the question said the call was a robocall.
When do 737 spam calls happen?
30% of the complaints that give a call time describe calls between 10am and 1pm, and 93% came on weekdays, most often on Wednesday. Times are as consumers reported them.
Are calls from 737 numbers really local?
Not necessarily. Only 48% of the FTC complaints about 737 numbers came from Texas residents; the most came from California, Florida and Virginia. 737 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Are 737 robocalls increasing?
In the four weeks to Oct 15, consumers filed 355 FTC complaints about 737 numbers, 30% more than the four weeks before.
How do I report a 737 scam call in Texas?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In Texas, the Texas Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.