Area code 713

About area code 713

NANPA lists 713 as an in-service geographic area code for Texas, first put into service on January 1, 1947. It is an overlay: 713 and 281, 346, 621, and 832 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 Houston, Sugar Land, Baytown, Deer Park, and Cleveland. By population, its largest named places are Houston, League City, Sugar Land, Baytown, and Deer Park.

Where 713 numbers are local

713 holds 4.9% of the 16,097 central office codes assigned in Texas, the 5th most of the state's 29 codes. 9 Census places could be matched to rate centers with 713 exchanges; the most populous are Houston (2.4 million), League City (118,000), Sugar Land (110,000), and Baytown (86,004). Each place page lists the exact prefixes and carriers for that town.

Ten-digit and seven-digit dialing in 713

According to NANPA's dialing-plan data, local calls within 713 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at service provider discretion."

Who holds 713 exchanges

29 carriers hold the 785 central office codes assigned in 713. Southwestern Bell has the most, with 470 (60%). 338 of the codes (43%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Where 713 numbers are rated

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 713 has codes in 19 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

How full is area code 713?

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 713, 98% of 800. 24 were assigned in 2020 or later.

Getting a 713 number for your business

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in area code 713 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.