Lake Oswego, Oregon
Pacific Time Zone (UTC-8) · OR · —
About Area Codes in Lake Oswego, Oregon
Lake Oswego, Oregon is served by 2 area codes: 503, 971. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within Lake Oswego require 10-digit dialing. The city is in the Pacific time zone (UTC-8).
Frequently Asked Questions
What area code is Lake Oswego, Oregon?
Lake Oswego, Oregon uses area codes 503 and 971.
What time zone is Lake Oswego in?
Lake Oswego is in the Pacific time zone (UTC-8).
Do I need to dial 10 digits when calling Lake Oswego?
Yes, all local calls in Lake Oswego require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 503 created?
Area code 503 is one of the original 86 area codes established in 1947 as part of the North American Numbering Plan (NANP).
What cities share area code 503 with Lake Oswego?
Other cities sharing area code 503 with Lake Oswego include Beaverton, Gresham, Hillsboro, Milwaukie, Oregon City, among others.
Lake Oswego, OR · Pacific Time Zone