Area code 512

About area code 512

Area code 512 is a geographic area code in Texas, in service since January 1, 1947, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 512 and 737 cover the same territory, so neighbors on the same street can have different area codes. It is in the Central time zone. The places with the most assigned exchanges include Austin, Georgetown, San Marcos, Bastrop, and Leander. By population, its largest named places are Austin, Georgetown, Leander, San Marcos, and Kyle.

Places served by 512

512 holds 4.9% of the 16,097 central office codes assigned in Texas, the 4th most of the state's 29 codes. 26 Census places could be matched to rate centers with 512 exchanges; the most populous are Austin (994,000), Georgetown (101,000), Leander (87,511), and San Marcos (74,316). For a storefront or service area inside 512, the place pages show which prefixes are rated local there.

Ten-digit and seven-digit dialing in 512

According to NANPA's dialing-plan data, local calls within 512 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere.

Carriers with 512 numbers

36 carriers hold the 785 central office codes assigned in 512. Southwestern Bell has the most, with 274 (35%). 523 of the codes (67%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Local calling areas in 512

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 512 has codes in 36 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

How full is area code 512?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 785 are assigned in 512, 98% of 800. 16 were assigned in 2020 or later.

Getting a 512 number for your business

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in area code 512, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.