The 425 area code serves the Seattle Eastside and Everett in Washington, covering eastern King County and southern Snohomish County. Created in 1997 in a split from Seattle’s 206 code, it is now overlaid across western Washington by area code 564. If a 425 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 425 at a Glance
| Detail | Information |
|---|---|
| Area Code | 425 |
| State | Washington (WA) |
| Major Cities | Bellevue, Everett, Redmond, Kirkland |
| Time Zone | Pacific Time (PT) |
| Country Code | +1 (USA) |
| Overlay Codes | 564 (western WA overlay) |
Geographic Coverage & Major Cities
Area code 425 covers the suburbs east and north of Seattle, including eastern King County (the Eastside) and southern Snohomish County.
- Bellevue – the largest city on the Eastside and a major business center
- Redmond – home of Microsoft’s headquarters
- Everett – a Snohomish County city and home to a major Boeing plant
- Kirkland, Renton & Bothell – established Eastside suburbs
From Microsoft’s campus to Boeing’s factories, a 425 number is closely tied to the identity of the Seattle Eastside.
A Brief History of Area Code 425
Area code 425 was created in 1997 in a split from the 206 code, taking the Eastside and Everett suburbs. In 2017, the 564 overlay was added across all of western Washington, and 10-digit dialing became mandatory.
Time Zone & Best Time to Call
Numbers in the 425 area code use Pacific Time (PT). The region observes Daylight Saving Time, shifting from PST (UTC-8) to PDT (UTC-7) between March and November each year.
How to Dial Phone Numbers in Area Code 425
Because 425 shares its region under an overlay, the area requires 10-digit dialing on every call.
Calling within the United States or Canada
- 10-digit dialing: Include the area code – 425-XXX-XXXX.
- 11-digit dialing: You can also dial 1-425-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 425 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 425 XXX XXXX
- From any mobile phone worldwide: +1 425 XXX XXXX
Is Area Code 425 a Scam? Safety & Protection Tips
Area code 425 is a legitimate Washington area code – a call from it is not fraudulent by default. However, scammers frequently spoof local codes like 425, faking the caller ID so their number appears to come from a trusted local line. Neighbor spoofing, which mimics the first six digits of your own number, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government impersonation | Callers posing as the IRS or SSA threatening arrest or fines |
| Bank & card fraud alerts | Claims of suspicious activity seeking your account details |
| Tech & job-offer scams | Fake recruiter or IT-department calls targeting the Eastside tech workforce |
| Utility shut-off threats | Fake Puget Sound Energy disconnection demands |
How to report, block, and look up 425 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in Washington
Area code 425 shares and borders several other Washington codes:
- 564 – the western Washington overlay that shares the region with 425 (see our 564 area code guide)
- 206 – Seattle to the west, from which 425 split (see our 206 area code guide)
- 253 – Tacoma and the South Sound to the south (see our 253 area code guide)
- 360 – outer western Washington (see our 360 area code guide)
Explore more codes across the state on our Washington area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Washington:
Frequently Asked Questions About Area Code 425
Where is the 425 area code located?
Area code 425 covers the Seattle Eastside and Everett in Washington, including Bellevue, Redmond, and Kirkland. It operates on Pacific Time and is overlaid by area code 564.
What is the difference between 425 and 564?
425 is the geographic code for the Eastside and Everett, while 564 is a western Washington overlay that covers the same area to supply more phone numbers.
Is 425 a landline or cell phone area code?
Both. Area code 425 serves landlines, mobile phones, and VoIP numbers throughout the Seattle Eastside.
Should I answer a call from an unknown 425 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 425 Guides
- Is a 425 call safe? Read Is area code 425 a scam? Spam & safety guide.
- Local coverage: see the Bellevue area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.