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Area code 512

Area code 512 serves Texas, including Austin, Georgetown and San Marcos (Central time). It has been in service since January 1, 1947 and shares its area with 737.

Numbers starting with 512 drew 2,618 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 1,250 complaints to the FCC since November 2023. The number on your screen can be faked, so a 512 number proves nothing about where a call came from.

Location
TexasAustin-Round Rock-San Marcos, TX Metropolitan Statistical Area
Time zone
Central
In service since
January 1, 1947
Overlay
Same area as 737
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
785 of 792held by 36 carriers
Projected to run out
2Q 2045NANPA forecast 2026.2

Complaints about 512 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 512. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

2,618

FCC complaints since November 2023

1,250

Different 512 numbers reported

3,324

FCC complaints naming a 512 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202319
December 202318
January 202421
February 202426
March 202416
April 202416
May 202421
June 202421
July 202431
August 202422
September 202420
October 202426
November 202431
December 202414
January 202533
February 202529
March 202530
April 202528
May 202532
June 202532
July 202550
August 202523
September 202527
October 20251
November 202534
December 202556
January 202660
February 202633
March 202627
April 202623
May 202629
June 202638
July 202646
August 202643
September 202687
October 2026153

What people said 512 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 1,510 of 2,618 reports were robocalls.

Show as a table
SubjectReports
Other1,023
Dropped call or no message404
Calls pretending to be government, businesses, or family and friends379
Medical and prescriptions324
Reducing your debt (credit cards, mortgage, student loans)79
Warranties and protection plans40

Most reported 512 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Places served by 512

NANPA lists 36 rate centers for 512. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Austin585
  • Georgetown29
  • San Marcos26
  • Bastrop19
  • Leander12
  • Lockhart11
  • Burnet8
  • Taylor7
  • Kyle6
  • Lampasas6
  • Rockdale6
  • Buda5
  • Wimberley5
  • Buchanan Dam4
  • Dale/Lytton Springs4
  • Dripping Springs4
  • Elgin4
  • Jarrell4
  • Smithville4
  • Adamsville3
  • Bertram3
  • Hutto3
  • Liberty Hill3
  • Lometa3
Show all 36 rate centers

Milano, Paige, Kempner, Martindale, Mcdade, Thorndale Thrall, Xxxxxxxxxx, Briggs, Coupland, Fentress, Granger, San Gabriel.

Phone companies holding 512 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 67% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 36 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Southwestern Bell273
New Cingular Wireless PCS, LLC - IL98
T-Mobile USA, Inc.70
Cellco Partnership dba Verizon Wireless - TX49
Level 3 of Telecom of Texas, LLC - TX38
Frontier Southwest Inc dba Frontier Comm of Texas37
Level 3 Communications, LLC - TX28
Onvoy, LLC - TX26

When today's 512 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
200117
200211
20031
20048
20058
200625
200714
200819
20099
201013
201115
201219
201315
201427
20154
20181
20193
20211
20229
20235
20241

Check a 512 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in Texas

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show