To meet the burgeoning demand for new phone numbers in one of America’s fastest-growing regions, Central Texas has introduced the 736 area code. This change impacts residents and businesses in the existing 512 area code territory, including the city of Austin. This guide explains what the new area code is, who is affected, and the crucial changes to how you dial the phone.
**1. Understanding the New 736 Area Code
The implementation of a new area code, known as an “overlay,” is a significant event for a region’s telecommunications infrastructure. This section covers the essential details of this new numeric identity for Central Texas.
- What is an Area Code Overlay?
This subsection explains that the 736 area code is an overlay on the existing 512 area code. It clarifies that this new code does not replace 512; rather, it serves the same geographic area. New numbers assigned in the region may be from either the 512 or the 736 area code.
- Geographic Territory Covered by the 736 Area Code
This part details the specific region in Central Texas where the 736 area code has been deployed. It lists the major cities and counties affected, including Austin, Round Rock, San Marcos, and other surrounding communities, allowing residents to easily determine if they are in the overlay zone.
- Why Was the 736 Area Code Necessary?
The primary reason for this change is “number exhaustion.” This section explains how the explosive population growth and the proliferation of cell phones, VoIP services, and other connected devices have depleted the available phone numbers within the original 512 area code.
2. The Critical Change: Mandatory 10-Digit Dialing

With the introduction of the 736 area code, the way local calls are made has permanently changed for everyone in the 512/736 region, regardless of which area code their personal number has.
- The End of Seven-Digit Dialing for Local Calls
This subsection clearly states that dialing a seven-digit number for a local call is no longer effective. It explains that all local calls, even to a neighbor with the same area code, now require dialing the full 10-digit phone number.
- How to Correctly Dial All Calls
This part provides a simple, unambiguous guide to the current dialing procedure for anyone within the overlay region:
- Local Calls: Dial Area Code (512 or 736) + Telephone Number
- Long-Distance Calls: Dial 1 + Area Code (512 or 736) + Telephone Number
- Updating Your Devices and Contact Lists
This crucial section provides a checklist of services and devices that must be reprogrammed or updated to use 10-digit numbers. This includes mobile phone contacts, security systems, medical alert devices, business stationery, advertising materials, and automated dialing equipment.
**3. Key Facts and Consumer Information for the 736 Area Code
Beyond the significant change in dialing, there are several key points that residents and businesses need to know about the new 736 area code.
- Your Existing Phone Number Will Not Change
This is the most important point of clarification. This subsection reassures residents that the introduction of the 736 area code does not require them to change their existing phone number. A 512 number remains a 512 number.
- What Stays the Same?
We will confirm that the distinction between local and long-distance calls, the price of a call, coverage areas, and other rates and services are not affected by the addition of the 736 area code. A local call is still a local call, just dialed differently.
- Be Alert for Potential Scams
This final part warns consumers to be wary of scams. It advises that no one should claim you need to pay a fee or provide personal information to accommodate the 736 area code transition. Such claims are fraudulent.