713 Area Code: Houston, Texas — Cities, Overlay & Business Guide

The 713 area code is Houston's original telephone prefix — assigned in 1947 as one of the first four codes in Texas and still the prefix most associated with the city today. Houston is the energy capital of the world, the home of NASA's Johnson Space Center, and the site of the Texas Medical Center, the largest medical complex on the planet. A 713 number places your business at the centre of all of that.

This guide covers the full picture: which Houston cities and neighbourhoods 713 serves, how it relates to the 281, 832, and 346 overlay codes, the code's history since 1947, the Central Time business-hours implications, and exactly how to activate a 713 virtual number for your business in minutes.

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The 713 area code is assigned to Houston and the immediate surrounding communities in Harris County and adjacent counties in southeastern Texas. It was one of the original North American Numbering Plan (NANP) codes allocated in 1947, when it covered a vast swath of southeast Texas from the Sabine River to the Brazos Valley.

A 1983 split carved off the outlying region as area code 409, narrowing 713 to the Houston core, where it has remained as the metro's flagship code ever since.

Dialing Format and Time Zone

• Dialing format: (713) 555-0182
• International: +1 713-555-0182
• Time zone: Central Time (CT) — UTC−6 Standard, UTC−5 Daylight Saving (March–November)
• 10-digit dialing required for all local calls

The 713 area code is centred on the City of Houston and the densely populated communities of Harris County, extending into neighbouring Fort Bend, Brazoria, Galveston, Montgomery, Liberty, Chambers, and Waller counties. Because 713 now shares its territory with several overlay codes, the same geography is served by 713, 281, 832, and 346 numbers alike. Key communities and neighbourhoods include the following.

• Downtown Houston — the city's commercial and financial core, home to major energy and corporate headquarters
• The Texas Medical Center — the world's largest medical complex, just south of Downtown
• Midtown & Montrose — dense, walkable districts known for dining, arts, and small business
• The Heights — a historic, fast-growing neighbourhood northwest of Downtown
• Uptown & the Galleria — Houston's premier retail and office district
• West University Place — an affluent independent city surrounded by Houston
• Bellaire — a leafy residential city within the Houston core
• South Houston — an industrial and residential community southeast of the city
• Pasadena & Galena Park — industrial port-side communities along the Houston Ship Channel
• Pearland & Sugar Land — rapidly growing suburban cities on the metro's southern edge

Outlying parts of the greater Houston region — such as Conroe, The Woodlands, and Spring to the north — fall partly under nearby codes, but they form one contiguous metro economy with the 713 core. Many Houston businesses maintain a presence across several of these codes.

The 713 area code observes Central Time (CT) — UTC−6 during Standard Time and UTC−5 during Daylight Saving Time, which runs from mid-March to early November. Houston follows the same clock as Dallas, Chicago, and most of the central United States.

Central Time is convenient for businesses operating across the country: it is one hour ahead of the Pacific coast and one hour behind the East coast. A 713 number lets you comfortably reach contacts in both time zones within a single working day, which is one reason Houston is a popular base for national sales and support operations.

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Houston outgrew a single area code decades ago. As pagers, fax lines, and mobile phones multiplied through the 1990s, the region added overlay codes that cover the exact same geography as 713. Today, several codes blanket the metro, and because they overlap, 10-digit dialing is mandatory for every call — even to a neighbour across the street.

• 713 — the original Houston code, carrying the strongest local brand recognition and the deepest history
• 281 — added in 1996 as the first overlay, now covering the same greater Houston territory
• 832 — added in 1999 as a second overlay across the entire region
• 346 — added in 2014 as the newest widely available overlay for Houston
• 621 — introduced in early 2025 as additional relief for the metro's number demand

Beyond the Houston overlays, outlying parts of the region use adjacent codes: 936 to the north, 979 to the west, and 409 to the east toward Beaumont and the Gulf. For businesses targeting Houston itself, a 713 number remains the strongest signal of local identity — it is the prefix the rest of Texas associates with the city.

Houston is one of the most economically significant cities in the United States, anchored by energy, aerospace, healthcare, and trade. A 713 number connects your business to an economy that operates on a global scale across several distinct industries.

Energy and the Oil & Gas Sector

Houston is widely known as the energy capital of the world. The metro is home to a dense concentration of oil and gas producers, refiners, oilfield services firms, and energy traders, along with a growing cluster of companies working on the energy transition. The 713 code sits at the heart of this corridor, from Downtown headquarters towers to the refining complexes along the Houston Ship Channel.

NASA, the Texas Medical Center, and Healthcare

Just southeast of the city, NASA's Johnson Space Center directs human spaceflight and is home to Mission Control. To the south of Downtown, the Texas Medical Center is the largest medical complex in the world, bringing together leading hospitals, research institutions, and universities. Together they make Houston a global hub for aerospace, medicine, and life-sciences research.

The Port of Houston and Global Trade

The Port of Houston is one of the busiest ports in the United States, moving enormous volumes of cargo and serving as a backbone of the region's logistics, petrochemical, and manufacturing economy. The port and the surrounding ship channel industries give Houston deep ties to international trade — and businesses serving that economy benefit from a recognisable local 713 presence.

Modern VoIP and cloud phone providers let you activate a 713 Houston number in minutes — no Texas office, no hardware, and no long-term contract required. Search the available 713 inventory, pick a number, complete a quick verification, and configure call routing, voicemail, and an auto-attendant. Your number is live and callable almost immediately.

A 713 number is ideal for any business that wants to reach Houston customers with a familiar local identity — energy and oilfield-services vendors, healthcare and medical suppliers serving the Texas Medical Center, logistics and trade firms tied to the port, and national companies opening a Houston sales line.

MeraTalk provides 713 Houston virtual phone numbers as part of its cloud telephony platform: route calls to any device, record conversations, and integrate with your CRM from a single dashboard. Numbers activate in minutes — search the available 713 inventory at meratalk.com.

Businesses serving the Houston market often weigh a local 713 prefix against a toll-free number, and the right answer depends on who is calling. Local digits signal neighborhood presence — the plumber, the clinic, the oilfield-services vendor that customers expect to find across town. Toll-free digits signal scale, suiting a national support desk that fields callers from every state.

• Choose local when the goal is winning Houston customers — answer rates climb when the caller ID looks like home
• Choose toll-free when callers span the whole country and a single, memorable line matters more than geography
• Choose both when a company sells locally but supports nationally — cloud platforms route each line to the same team

Because virtual numbers cost little to add, many Houston firms simply run the pair: local digits on trucks and signage, a toll-free line on packaging and invoices. For more, see 713 area code.

Once a Houston line is active, routing determines what actually happens when it rings. Modern cloud platforms treat the number as an entry point, not a fixed phone, so a single set of digits can serve a whole distributed operation — a sales rep near the Galleria, a dispatcher along the Ship Channel, and an after-hours answering team in another state.

1. 1Set business hours — send daytime calls to the live team and evening calls to voicemail or an overflow service tuned to the Central Time clock.
2. 2Build a simple menu — an auto-attendant separating sales, support, and billing keeps callers from bouncing between staff.
3. 3Add failover — if no one answers within a set ring count, forward to a mobile, a second office, or a recorded callback option.

Routing rules can be changed at any time from a dashboard, so the setup grows with the business — no rewiring, no new hardware, no service call.

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