Mercer Island, Washington
Pacific Time Zone (UTC-8) · WA · —
About Area Codes in Mercer Island, Washington
Mercer Island, Washington is served by area code 425, which was established in 1997 as a geographic split from a larger area code region. The city falls within the Pacific time zone (UTC-8). All calls to and from Mercer Island use the 425 area code prefix for local and long-distance dialing.
Frequently Asked Questions
What area code is Mercer Island, Washington?
Mercer Island, Washington uses area code 425.
What time zone is Mercer Island in?
Mercer Island is in the Pacific time zone (UTC-8).
Do I need to dial 10 digits when calling Mercer Island?
Standard 7-digit dialing is used for local calls within Mercer Island. However, 10-digit dialing is always accepted and required for long-distance calls.
When was area code 425 created?
Area code 425 was established in 1997 as a geographic split from a larger area code region to serve the growing population.
What cities share area code 425 with Mercer Island?
Other cities sharing area code 425 with Mercer Island include Bellevue, Bothell, Edmonds, Everett, Issaquah, among others.
Mercer Island, WA · Pacific Time Zone