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Newcastle, WA Area Code

Newcastle, Washington (population 13,128) uses area code 425.

Area code425
Time zonePacific
Local time now…

Newcastle has no telephone exchange of its own in NANPA records; it is served by the Renton exchange about 6.2 km away.

NewcastleBellevueEverettRentonKirklandRedmondShorelineSammamishBothellLynnwoodLake StevensIssaquahMaple ValleyNewcastle
Newcastle and nearby cities in area code 425

Carriers with Newcastle numbers

53 prefixes are assigned to the Renton exchange: 17% mobile, 40% VoIP and cable, 43% landline.

CarrierPrefixes
Lumen (Qwest)18
Verizon Business (MCImetro)8
Lumen (Level 3)7
AT&T (Teleport)5
Allstream4
AT&T Mobility3
Verizon Wireless3
T-Mobile3

Area codes used in Newcastle

Area codePrefixes serving NewcastleMain carriers in this code
42553Ziply Fiber, T-Mobile, Lumen (Qwest)

Newcastle phone number prefixes

Numbers starting with these first six digits were originally assigned to the Renton exchange.

Nearby cities in area code 425

Questions

What is the area code for Newcastle, WA?
The area code for Newcastle, Washington is 425.
What time zone is Newcastle in?
Newcastle is in the Pacific time zone.