Local Dialing Changes

Last updated: February 14, 2019

New Western Washington Area Code And 10-Digit Local Dialing For 360, 206, 253 and 425 Area Codes

Western Washington is getting an new area code that will be overlaid with the existing area codes. An overlay is the addition of a new area code to the same geographic region as an existing area code. This is done because the existing area does not have enough telephone numbers left to meet demands. The new 564 area code will begin to be assigned to new telephone lines or services beginning Aug. 28, 2017. You will not be assigned the 564 area code unless you order new telephone service.

All western Washington area codes are affected. The new 564 area code will initially be introduced as an overlay to the 360 area code region and then expanded to the 206, 253, and 425 area codes as additional telephone numbers become necessary. The new dialing procedure requires callers in the western Washington area codes (206, 253, 360, 425, and 564) to dial the area code plus the seven-digit telephone number, for example, 360-XXX-XXXX. Local calls will continue to be local, even though 10-digit dialing will be required.

When will the dialing change begin for University of Washington Phone?

The new dialing procedures will be required after Sept. 15, 2017 for campus phones. After that day, you must dial 10-digits as described above for all local calls. After Sept. 15th if you do not use the new dialing procedure, your call will not be completed and a recording will instruct you to hang up and dial again. However, don’t wait to start dialing 10 digits, it is already fully supported on your campus phone.

What will you need to do?

In addition to changing your dialing procedure, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a seven-digit number must be reprogrammed to 10-digit dialing. Examples include: stored contact lists in telephones, fax machines, call forwarding settings, etc.