Oregon area codes — detailed data

NANPA NPA database, current as of July 28, 2026.

This page expands the state overview with per-code operational data from NANPA: parent codes, projected exhaust dates, dialing patterns and relief status for all 4 Oregon codes.

Aggregate footprint: the state's 4 geographic codes currently carry 2,206 active NXX prefixes over 416 rate-center anchorings, with 1,505 prefixes in thousands-block pooling. 4 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 458 came out of 541 in 2010; 541 came out of 503 in 1995; 971 came out of 503 in 2000. The remaining code (503) dates back to the plan's early assignments.

Dialing plans: 4 codes use plain ten-digit local dialing (10D). Overlay territories always dial ten digits; the 2021 988-hotline transition moved most others to ten digits as well.

The tightest capacity in the state is 503 (complex 503/971), projected to exhaust 1Q 2041.

Status: no Oregon code is currently in jeopardy or active relief planning — capacity is adequate near-term per NANPA.

Code-by-code notes

503 — spawned 541, 971; overlaid by 971; exhaust forecast 1Q 2041.

541 — spawned 458; carved from 503; overlaid by 458; exhaust forecast 2Q 2051; spans two time zones.

971 — carved from 503; overlaid by 503; exhaust forecast 1Q 2041.

458 — carved from 541; overlaid by 541; exhaust forecast 2Q 2051; spans two time zones.

Time-zone note: 458, 541 span two time zones — rare among NANP codes.