New Jersey area codes — detailed data

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

Full numbering detail for every active New Jersey area code: lineage (which code it split from), NANPA exhaust projections, dialing plans and jeopardy status. This is the working data behind the overview page.

Aggregate footprint: the state's 10 geographic codes currently carry 5,544 active NXX prefixes over 367 rate-center anchorings, with 4,036 prefixes in thousands-block pooling. 10 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 551 came out of 201 in 2001; 609 came out of 201 in 1957; 640 came out of 609 in 2018; 732 came out of 908 in 1997; 848 came out of 732 in 2001; 856 came out of 609 in 1999; 862 came out of 973 in 2001; 908 came out of 201 in 1990; 973 came out of 201 in 1997. The remaining code (201) dates back to the plan's early assignments.

Dialing plans: 10 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 856, projected to exhaust 1Q 2035.

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

Code-by-code notes

609 — spawned 856, 640; carved from 201; overlaid by 640; exhaust forecast 3Q 2046.

732 — spawned 848; carved from 908; overlaid by 848; exhaust forecast 3Q 2051.

201 — spawned 609, 908, 973, 551; overlaid by 551; exhaust forecast 2Q 2048.

973 — spawned 862; carved from 201; overlaid by 862; exhaust forecast 3Q 2052.

908 — spawned 732; carved from 201; exhaust forecast 3Q 2039.

856 — carved from 609; exhaust forecast 1Q 2035.

862 — carved from 973; overlaid by 973; exhaust forecast 3Q 2052.

551 — carved from 201; overlaid by 201; exhaust forecast 2Q 2048.

848 — carved from 732; overlaid by 732; exhaust forecast 3Q 2051.

640 — carved from 609; overlaid by 609; exhaust forecast 3Q 2046.