Wisconsin area codes — detailed data

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

Working detail for Wisconsin's 8 area codes: history, capacity forecasts and dialing plans, straight from NANPA's NPA database.

Aggregate footprint: the state's 8 geographic codes currently carry 3,668 active NXX prefixes over 699 rate-center anchorings, with 2,734 prefixes in thousands-block pooling. 8 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 262 came out of 414 in 1999; 274 came out of 920 in 2023; 353 came out of 608 in 2023; 534 came out of 715 in 2010; 920 came out of 414 in 1997. The remaining codes (414, 608, 715) date back to the plan's early assignments.

Dialing plans: 8 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 262, projected to exhaust 1Q 2036.

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

Code-by-code notes

608 — spawned 353; overlaid by 353; exhaust forecast 1Q 2065.

715 — spawned 534; overlaid by 534; exhaust forecast 4Q 2070.

920 — spawned 274; carved from 414; overlaid by 274; exhaust forecast 2Q 2059.

262 — carved from 414; exhaust forecast 1Q 2036.

414 — spawned 920, 262; exhaust forecast 2Q 2041.

534 — carved from 715; overlaid by 715; exhaust forecast 4Q 2070.

274 — carved from 920; overlaid by 920; exhaust forecast 2Q 2059.

353 — carved from 608; overlaid by 608; exhaust forecast 1Q 2065.