Zip Area Code

New Castle Northwest, Pennsylvania

No ZIP code carries the name of New Castle Northwest, Pennsylvania, in Lawrence County; the nearest ZIP codes are 16101 and 16105, in area code 724, with 878 as an overlay.

Nearest ZIP
16101, 16105
Area codes
724, 878
Time zone
Eastern Time
Coordinates
41.0221, -80.3558

Nearest ZIP codes to New Castle Northwest

These are the ZIP codes nearest to New Castle Northwest, each listed with the post office it is named after.

ZIP codePost officeCountyArea codes
16101New CastleLawrence County724, 878
16105New CastleLawrence County724, 878

Area codes for New Castle Northwest

  • Area code 724

    In service since February 1, 1998. Shares its area with 878. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 878

    In service since August 17, 2001. Shares its area with 412 and 724. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

New Castle Northwest is in the Eastern Time zone.

Towns near New Castle Northwest