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Making a local call? You now need to use the area code

Effective on Sunday (Oct. 24), all phone calls in the Tri-Valley -- even local ones -- now require the three-digit area code, the FCC announced. 
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A student looks at their phone before slipping it into a YONDR pouch at the start of the school day at San Mateo High School on Sept. 24, 2019.

Effective on Sunday (Oct. 24), all phone calls in the Tri-Valley -- even local ones -- now require the three-digit area code, the FCC announced. The 925 area code is one of 82 across the country making the switch. 

In California, you may also need to dial 1 before the area code, according to the FCC.

The rollout of a new three-digit number to reach the National Suicide Prevention Lifeline is the reason behind the change. Last year, the FCC established 988 as the nationwide three-digit phone number for the service which will be available nationwide by July 16, 2022.

It "will provide an easy to remember and easy to dial three-digit number to reach suicide prevention and mental health counselors, similar to 911 for emergencies and 311 for local government services," the FCC said in a statement. 

Callers needing help are advised to continue using the old number, 1-800-273-8255 (1-800-273-TALK) during the transition period. 

According to the FCC, on and after Oct. 24, local calls dialed with only seven digits may not connect, and a recording will inform you that your call cannot be completed as dialed. If that happens, hang up and dial again using the area code and the seven-digit number.

A full list of affected area codes is online at nationalnanpa.com.

Editor's note: Andrea Gemmet writes for The Almanac, an Embarcadero Media publication.