713 Area Code: Houston, TX | Location & Time Zone

The 713 area code is one of the original telephone area codes serving Houston, Texas, and remains one of the most recognizable codes in the United States. Established in 1947 as part of the North American Numbering Plan, the 713 area code covers the heart of Houston and its inner-loop communities, serving millions of residents and businesses in America’s fourth-largest city. This comprehensive guide explores everything you need to know about the 713 area code, including its geographic coverage, time zone information, history, and dialing instructions.

What is the 713 Area Code?

The 713 area code is a geographic telephone area code serving Houston, Texas, and portions of Harris County. Originally covering the entire southeastern region of Texas, 713 was one of the 86 original area codes created by AT&T and the Bell System in 1947. Today, after several splits and the addition of overlay codes, 713 primarily serves the central Houston area, including downtown Houston, the Inner Loop, and nearby communities within the Interstate 610 corridor.

As Houston experienced explosive population and economic growth throughout the latter half of the 20th century, the 713 area code became synonymous with the city itself. The area code is now shared with overlay codes 281, 832, and 346, which were introduced to meet the increasing demand for telephone numbers in the Greater Houston metropolitan area.

713 Area Code Location & Coverage

Cities and Regions Covered

The 713 area code primarily serves the following cities and communities in Harris County, Texas:

Major Cities: Houston (central and inner-loop areas), Bellaire, West University Place, Southside Place, and portions of Pasadena. The coverage area includes downtown Houston, the Museum District, the Texas Medical Center (the world’s largest medical complex), Midtown, Montrose, the Heights, River Oaks, Greenway Plaza, and Memorial Park areas.

Key Neighborhoods: The 713 area code encompasses some of Houston’s most historic and economically significant neighborhoods, including the Energy Corridor business district, Uptown/Galleria area, East End, Third Ward, Fourth Ward, Fifth Ward, and Neartown. These areas represent the cultural, financial, and commercial heart of Houston.

Geographic Coverage

The 713 area code covers approximately 670 square miles in the central Houston metropolitan area. The coverage is generally bounded by the Interstate 610 Loop (also known as “The Loop”), though some areas immediately outside this boundary also use 713 numbers. The area code serves the most densely populated and economically active portion of Harris County, which is the third-most populous county in the United States.

Time Zone Information

The 713 area code operates in the Central Time Zone, which means it observes Central Standard Time (CST) during winter months and Central Daylight Time (CDT) during summer months. When planning calls or meetings with contacts in the 713 area code, remember that Houston is one hour behind Eastern Time, two hours ahead of Pacific Time, and six hours behind Coordinated Universal Time (UTC-6) during standard time. For international callers and business coordination, understanding this time difference is essential for effective communication with Houston-based contacts.

713 Area Code Details

History of 713 Area Code

When Was 713 Created?

The 713 area code was established in 1947 as one of the original 86 area codes created when AT&T and the Bell System implemented the North American Numbering Plan (NANP). Initially, 713 covered an enormous geographic area encompassing all of southeastern Texas, including Houston, Galveston, Beaumont, Port Arthur, and surrounding regions. This vast coverage area reflected the relatively modest telephone usage and population density of the region in the immediate post-World War II era.

For over four decades, 713 remained the sole area code for southeastern Texas, becoming deeply embedded in Houston’s cultural identity. The area code appeared in countless advertisements, business cards, and local references, making it an integral part of the city’s character and regional pride.

Area Code Changes and Overlays

As Houston’s population exploded and telecommunications technology advanced, the demand for telephone numbers in the 713 area code region rapidly increased. The first major change occurred in 1983 when the 409 area code was split from 713 to serve Galveston, Beaumont, and other coastal areas of southeastern Texas, leaving 713 to focus on the Houston metropolitan area.

In 1996, the 281 area code was introduced as a geographic split, taking the suburban areas surrounding Houston while 713 retained the inner-city and downtown regions. This split was necessary due to the exhaustion of available telephone numbers within the original 713 territory. However, the rapid growth continued, and in 1999, the 832 area code was introduced as Houston’s first overlay code, covering the same geographic area as both 713 and 281. This overlay approach allowed existing customers to keep their numbers while providing new number assignments.

Most recently, in 2014, the 346 area code was added as another overlay to the Houston region, further expanding the available pool of telephone numbers. Today, all four area codes (713, 281, 832, and 346) serve the Greater Houston area, with 713 retaining its prestigious status as the original Houston area code.

How to Call 713 Area Code

Dialing Within the Area Code

Due to the overlay area codes serving the Houston region, ten-digit dialing is mandatory for all calls within the 713 area code, even for local calls. You must dial the full ten-digit number including the area code: 713-XXX-XXXX. Seven-digit dialing is no longer available in the Houston area. This requirement ensures calls are properly routed when multiple area codes serve the same geographic region. The “1” prefix is not required for local calls within the Houston area, but many phone systems automatically add it.

Dialing From Other Area Codes

When calling a 713 number from outside the Houston area but within the United States or Canada, you must dial: 1-713-XXX-XXXX. The “1” prefix indicates a long-distance call within the North American Numbering Plan. Most modern mobile phones and VoIP services automatically add the “1” prefix when dialing out-of-area numbers, but it’s important to include it manually when using traditional landline phones to ensure the call connects properly.

International Dialing

For international callers dialing a 713 number from outside the United States, the format is: +1-713-XXX-XXXX or your country’s international access code followed by 1-713-XXX-XXXX. The “+1” represents the country code for the United States and Canada. For example, from most European countries, you would dial 00-1-713-XXX-XXXX, while from many Latin American countries, you would dial 00-1-713-XXX-XXXX. Mobile phone users can typically use the “+” symbol by long-pressing the “0” key.

Nearby Area Codes

Population & Demographics

The 713 area code serves the central core of Houston, which is the fourth-largest city in the United States and the largest city in Texas. The greater Houston metropolitan area has a population exceeding 7 million people, with the 713 area code region specifically covering approximately 2.3 million residents in the central city and inner-loop communities.

Houston is one of the most diverse cities in America, with no single ethnic group forming a majority. The 713 area code region reflects this remarkable diversity, with significant Hispanic, African American, Asian, and Caucasian populations. The area is known for its international character, with residents from over 145 countries speaking more than 90 languages.

Economic Significance: The 713 area code encompasses Houston’s primary business districts, including the downtown central business district, the Energy Corridor, the Texas Medical Center, and the Uptown/Galleria area. Houston is the global capital of the energy industry, hosting the headquarters of numerous Fortune 500 companies, particularly in the oil, gas, and energy sectors. The area code region also includes significant aerospace (NASA’s Johnson Space Center is nearby), healthcare, manufacturing, and international trade industries, with the Port of Houston being one of the busiest ports in the United States.

For more information about current times in different locations worldwide, visit our Current Local Times Around the World page. If you need to set timers for calls or meetings across time zones, check out our Timer Tools section.

Frequently Asked Questions

Is 713 a toll-free area code?

No, 713 is not a toll-free area code. It is a standard geographic area code serving Houston, Texas. Calls to 713 numbers are billed according to your phone plan’s rates for calls to Houston. Toll-free area codes include 800, 888, 877, 866, 855, 844, and 833. If you’re calling a 713 number from outside your local calling area, standard long-distance charges may apply unless you have an unlimited calling plan.

Why do I need to dial 10 digits for local calls in Houston?

Ten-digit dialing became mandatory in the Houston area because of overlay area codes. With 713, 281, 832, and 346 all serving the same geographic region, the phone system requires the full area code to properly route calls. This ensures your call reaches the correct number regardless of which area code it uses. Even local calls within the same neighborhood may use different area codes due to the overlay system.

Can I still get a 713 phone number?

While 713 numbers are highly sought after due to their prestige as Houston’s original area code, availability is extremely limited. Most new phone number assignments in the Houston area now receive 281, 832, or 346 area codes. However, occasionally 713 numbers become available when they’re returned to the pool after being disconnected. Business and residents often prefer 713 numbers for their recognition and local identity, making them valuable and sometimes available through specialized telecommunications providers or when purchasing an existing business line.

What’s the difference between 713, 281, 832, and 346?

All four area codes serve the Greater Houston metropolitan area, but they were introduced at different times. The 713 area code is the original code from 1947, primarily serving central Houston and inner-loop areas. The 281 area code was introduced in 1996 to serve suburban areas. The 832 area code was added in 1999 as an overlay covering the same region as both 713 and 281. The 346 area code was added in 2014 as another overlay. Today, any of these four codes can be assigned to any location within the Houston metro area, though 713 numbers are generally considered more prestigious due to their historical significance.

Do I need to dial 1 before calling a 713 number?

If you’re calling from within the Houston area, you do not need to dial “1” before the area code—just dial the ten-digit number (713-XXX-XXXX). However, if you’re calling from outside the Houston area but within the United States or Canada, you must dial “1” before the area code (1-713-XXX-XXXX). Many modern cell phones automatically add the “1” when necessary, but it’s good practice to include it for long-distance calls from landlines.

What time zone is the 713 area code in?

The 713 area code operates in the Central Time Zone (CT). Houston observes Central Standard Time (CST, UTC-6) during winter months and Central Daylight Time (CDT, UTC-5) during summer months when daylight saving time is in effect. When scheduling calls or meetings with contacts in the 713 area code, remember that Houston is one hour behind Eastern Time and two hours ahead of Pacific Time.

Is 713 area code safe from scam calls?

Like all area codes, 713 numbers can be used by both legitimate callers and scammers. The area code itself doesn’t determine whether a call is safe. Scammers can spoof (fake) any area code, including local ones, to make their calls appear trustworthy. Always be cautious with unexpected calls asking for personal information, money, or immediate action, regardless of the area code displayed. If you receive a suspicious call from a 713 number, verify the caller’s identity independently before providing any sensitive information. Legitimate businesses and government agencies will never pressure you for immediate payment or personal details over the phone.

Conclusion

The 713 area code remains an iconic symbol of Houston, Texas, representing the city’s rich telecommunications history since 1947. As one of the original area codes in the North American Numbering Plan, 713 has evolved alongside Houston’s tremendous growth from a regional city to one of America’s largest and most diverse metropolitan areas. Today, while sharing its geographic territory with overlay codes 281, 832, and 346, the 713 area code continues to serve the heart of Houston, including downtown, the Inner Loop, and the city’s most economically significant districts.

Understanding the 713 area code means understanding Houston itself—a dynamic, multicultural city that serves as the energy capital of the world, a major center for healthcare and aerospace, and a hub of international commerce. Whether you’re a resident, business owner, or someone connecting with Houston contacts, knowing how to properly dial 713 numbers and understanding the area’s time zone and geographic coverage ensures smooth communication with this vital American city.

For additional resources on time zones and scheduling tools, explore our comprehensive Blog Guides Section, where you’ll find helpful articles about managing time across different regions and optimizing your communications.