Where Is Area Code 512? Austin, Texas Coverage

512 · Austin

What is the area code for Austin?

The area code for Austin, Texas is 512, with overlay code 737 sharing the same geographic footprint. The 512 area code is a North American Numbering Plan geographic code assigned in 1947, covering the Austin Metro region. It serves approximately 2,300,000 residents on the Central Time (CT) (UTC-6 / UTC-5 DST).

The 512 area code has 783 assigned central-office prefixes (NXX codes, the three digits after the area code) across 48 rate centers, with numbers allocated to roughly 43 carriers.

At 783 of the ~792 usable central-office prefixes, the 512 area code has about 99% of its numbering capacity assigned, and that near-exhaustion is part of why overlay code 737 was added to the region. See how 512 compares in our NXX prefix allocation analysis across 338 US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Where is area code 512? Location and map area

Area code 512 is located in Texas, the United States. Its coverage area centers on Austin and spans the Austin Metro region. If you received a call from a 512 number, the caller's number was assigned in this area — though with number porting and virtual numbers, the person may be calling from anywhere.

The 512 location sits in Central Time (CT), so local business hours run roughly 9 a.m.–5 p.m. CT. Neighboring Texas area codes include 210, 214, 254.

For the full story — every city covered, overlay history, and local scam patterns — read the complete Austin area code guide.

All Austin area codes

Austin is served by 2 area codes across the metro area. 512 is the original 1947 code; the others were added as overlays or for surrounding suburbs.

• 512 (current page) — Overlay on the same metro, assigned 1947
• 737 — Austin — assigned 2013

Cities served by the 512 area code

The 512 area code covers 5 major cities and towns across the Austin Metro region (TX):

Businesses across Austin and surrounding cities use 512 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.

512 area code time zone and business hours

The 512 area code is in the Central Time (CT) zone (UTC-6 / UTC-5 DST). Standard business hours in 512 run 9 AM to 5 PM CT.

If you're calling into 512 from a different time zone, factor in the offset. For example, an Eastern Time business calling 512 at 9 AM ET reaches Austin at 8 AM CT — likely outside standard business hours.

History of the 512 area code

The 512 area code was one of the original 86 area codes assigned in 1947 when the North American Numbering Plan was first deployed. As Austin grew and number demand increased, overlay code 737 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.

• 1947 512 entered service (one of the 86 original NANP area codes)
• 2013 737 added to serve the same region

Is the 512 area code safe? Spam and scam calls

512 is a legitimate geographic area code for Austin — it is not a scam code or a premium-rate prefix, and a call from a 512 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.

If you get an unexpected 512 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov.

The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real Austin business will leave a clear voicemail and will not pressure you.

US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 512 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.

Why get a 512 area code number for your business?

Getting a 512 number gives your business three measurable advantages over a toll-free or out-of-area number:

1. Local trust signal. Customers in Austin recognize 512 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
2. Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
3. Targeted marketing. Businesses serving Austin and the broader Austin Metro can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.

For businesses in Austin and surrounding cities, top industries that benefit from local 512 presence include Energy, Healthcare, and Logistics. DialPhone's AI receptionist is available for every 512 number — never miss a call, even after standard business hours.

How to get a 512 area code number

Setting up a 512 business number with DialPhone takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available 512 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
3. Choose your number and configure. Assign your new 512 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a 512 number? Free number porting in 2 to 5 business days with zero service interruption.

New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.

512 area code overlay codes

The Austin Metro region is served by multiple overlay area codes:

Area Code	Coverage
512	Primary area code for Austin Metro, assigned 1947
737	Overlay — same geography (assigned 2013)

All overlay codes serve the same Austin region. New subscribers may be assigned any available code; existing numbers retain their original prefix.

AI receptionist for 512 area code businesses

Every DialPhone 512 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.

For businesses in Austin that handle high call volume, run extended hours, or need bilingual support (especially valuable in multilingual metros like Austin), the AI receptionist reduces voicemail backlog and improves first-call resolution.

All area codes in Texas

Texas has 29 active geographic area codes. The 512 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.

Nearby area codes

Related area codes in Texas and the Central Time (CT) region:

• 210 area code — San Antonio, Texas
• 214 area code — Dallas, Texas
• 254 area code — Waco, Texas
• 281 area code — Houston, Texas
• 325 area code — Abilene, Texas
• 346 area code — Houston, Texas

All Texas area codes → · Browse all US area codes →

More area codes: ← 510 Oakland · 513 Cincinnati →

How this page is verified

DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 512 region.

What to know before getting a 512 number

• Number availability is finite. Popular Austin area codes can be inventory-constrained — request specific vanity patterns early.
• Porting timing varies. Most 512 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
• HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.