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Local 10-Digit Dialing


To ensure a continuing supply of telephone numbers, two new area codes will be introduced in Connecticut later this year.  Area code 475 will be added to the same geographic area served by the 203 area code and area code 959 will be added to serve the same geographic area served by the 860 area code.

As a result, there is a change to the way local calls are to be dialed.  This procedure requires dialing 10 digits (i.e., the area code and the seven digit telephone number) and applies to all local calls, including those placed to telephone numbers with the same area code and prefix as the originating telephone number.  Local calls should not be dialed with the number “1” before the area code.  Number “1” is still used to place long distance calls.

NOTE: Calls to 911 and other service codes (211,311,411,511,611,711 and 811) and 5-digit (inter- and intra-campus calls) are not affected by this change.

As of May 16, 2009, local telephone service providers have allowed 10-digit local dialing.  On November 14, 2009, you must use 10-digits to place all local calls.  CCSU’s telephone system follows the same schedule.

To place a local call from a University phone:

·       Dial “9” for an outside line.

·       Dial the area code plus the 7-digit telephone number.  Do not precede the telephone number with the number “1”.

In addition to changing the way you dial, you may also need to:

·       Update any preprogrammed 7-digit numbers in your cellular phone and landline phone, as well as any text or e-mail alert services

·       Reprogram equipment with automatic dialers that are currently dialing a 7-digit number (i.e., fax machines, security systems, life safety systems and any equipment with a similar function)

·       Check web pages, business stationary or any advertising material

For additional information, visit the Connecticut Department of Public Utility Control (DPUC) website:


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