North American Numbers Source-cited · ownership disclosed
Area code
425
In service
United States · since 1997

Bellevue / Everett (Seattle north & east suburbs)

Area code 425 covers the suburbs north and east of Seattle, including the Eastside tech corridor and Everett. It was created in the 1997 three-way split of 206.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Bellevue / Everett (Seattle north & east suburbs)
Type
geographic
Status
in service
In service since
1997
Projected exhaust
2044 Q1

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 425 is

Southwestern Snohomish County and eastern/northern King County — the Seattle Eastside and areas north to Everett, extending east to North Bend and south to Maple Valley..

Communities served wholly or partly by 425:

BellevueRedmondEverettKirklandBothellEdmondsLynnwoodRentonIssaquahSammamishSnoqualmieKenmoreMukilteoNorth BendMaple Valley

Encompasses 26+ municipalities; Bellevue and Redmond are the major employment centers.

B · Relationships

How it relates to other codes

The codes 425 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1997 206 Seattle Split off from 206 in the April 1997 three-way division of the Seattle area.
Related · 1997 253 Tacoma Created in the same 1997 split; borders 425 to the south.
Related 360 Western Washington (outside Seattle metro) Adjacent to the north and west (360/564 territory).
Overlay 564 Western Washington (statewide overlay) 425 is designated to join the 564 overlay complex when exhaustion requires relief; not yet active. Re-check NANPA.
What's changing. No overlay active yet; scheduled to participate in the 564 overlay complex when needed (re-check NANPA).
C · History

How 425 got here

1997-04-27
Area code 425 established through the three-way split of 206; permissive dialing ran through November 16, 1997.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
647
Prefixes available
153
Thousands-blocks assigned
2,841

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 425 with another code →
Sources
Wikipedia ↗
Area code 425
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.