San Antonio phone calls change forever starting Saturday

The '726' area code will take effect in San Antonio in October 2017, according to the Public Utilities Commission of Texas. Click through to see which cities can lay claim to the oldest area codes in Texas. The '726' area code will take effect in San Antonio in October 2017, according to the Public Utilities Commission of Texas. Click through to see which cities can lay claim to the oldest area codes in Texas. Photo: Public Utility Commission Of Texas Photo: Public Utility Commission Of Texas Image 1 of / 18 Caption Close San Antonio phone calls change forever starting Saturday 1 / 18 Back to Gallery

San Antonians accustomed to dialing just seven numbers when making a phone call will have to change their habits starting Saturday, as preparations progress for a new area code coming to the city.

Ten-digit dialing will be required, regardless if phone users are dialing another 210 number. The change marks the beginning of the six-month "permissive period," according to a news release from the Public Utility Commission of Texas.

Seven-digit numbers, however, will still go through during six-month span, according to the PUC. The grace period ends in September, and the new "726" area code will be activated in October.

RELATED: San Antonio assigned new '726' area code in addition to '210'

The last time San Antonio received a new area code was in 1992, when the city was split off from Central Texas' 512 code. The creation of "726" last year signals the first time that residents will have to dial 10-digit phone numbers.

Can you guess what the oldest area codes in Texas are? Click through the gallery above to find out.

EDITOR'S NOTE: *An earlier version of this story incorrectly stated that the 10-digit dialing began Friday, March 24.

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