California’s Inland Empire Splitting Area Codes


Alarm customers and those who serve them in the Inland Empire section of Southern California will need to double check the phone connections to alarm panels in the coming weeks with the impending split of the 909 area code. Existing San Bernardino County/Riverside County phone customers using the 909 area code will be split off between the 909 and the new 951 area code on July 17.

Initially, callers to a number in the new 951 area code will hear a message that the number has been switched to the new area code. As of Oct. 30, that “permissive dialing” period will end and callers will be unable to reach a customer in the 951 area code without dialing “1-951” first.

The 909 area code is literally being split along the San Bernardino/Riverside county lines, with San Bernardino customers in cities like Chino, Claremont, Pomona, Rancho Cucamonga and San Dimas keeping the “909,” while customers in Riverside County cities like Corona, Norco and Riverside will switch to 951.

Though there are no other area code changes planned at this point nationwide beyond the 909/951 split, alarm companies and central stations should be aware of how an area code chance can affect their customers. Alarm panels may need to be reprogrammed to reach the central station correctly.

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