North American Numbers Source-cited · ownership disclosed
Area code
609
In service
United States · since 1957

Trenton / Atlantic City

Serves central and southeastern New Jersey, including the state capital Trenton, Princeton, and the Atlantic City shore region. Overlaid by 640 since 2018.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Trenton / Atlantic City
Type
geographic
Status
in service
In service since
1957
Projected exhaust
2046 Q3

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 609 is

Mercer, Burlington, Atlantic, Cape May, Ocean, Hunterdon, Monmouth, and part of Middlesex counties (south-central/shore NJ)..

Communities served wholly or partly by 609:

TrentonPrincetonAtlantic CityLong Beach Island

County coverage is partial in several counties; boundaries follow rate centers.

B · Relationships

How it relates to other codes

The codes 609 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1956 201 Jersey City / Hackensack 609 split from the original statewide 201 in 1956.
Spawned · 1999 856 Camden / Cherry Hill Southwestern (Philadelphia-side) portion split off as 856 in 1999.
Overlay · 2018 640 Trenton / Atlantic City (overlay) Coextensive overlay of the same territory.
What's changing. Overlaid by 640 (mandatory 10-digit dialing since 2018).
C · History

How 609 got here

1956
Created by splitting the southern half of New Jersey away from area code 201.
Source: Wikipedia
1999-06-14
Southwestern section split off as area code 856.
Source: Wikipedia
2018-09-17
Area code 640 overlay entered service; ten-digit dialing mandatory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
4,022

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 609 with another code →
Sources
Wikipedia ↗
Area code 609
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.