North American Numbers Source-cited · ownership disclosed
Area code
324
In service
United States · since 2024

Jacksonville (overlay)

All-services overlay of area code 904, serving the same northeast Florida / Jacksonville geography. Introduced to relieve projected number exhaustion of 904.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Jacksonville (overlay)
Type
geographic
Status
in service
In service since
2024
Projected exhaust
2057 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 324 is

Northeast Florida (First Coast) — same footprint as 904.

Communities served wholly or partly by 324:

Jacksonville

Shares the entire 904 service area; not a distinct geography.

B · Relationships

How it relates to other codes

The codes 324 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?

Overlay · 2024 904 Jacksonville Overlay covering the identical geographic area as 904; in service Feb 26, 2024.
What's changing. Live overlay on 904 since February 26, 2024; ten-digit dialing mandatory.
C · History

How 324 got here

2022-06-03
NANPA announced 324 as an overlay for the 904 numbering plan area.
Source: NANPA / carrier notices (secondary)
2023-08
Permissive ten-digit dialing began.
Source: Wikipedia: Area codes 904 and 324
2024-02-26
Area code 324 placed in service; mandatory ten-digit dialing.
Source: Wikipedia: Area codes 904 and 324
D · Capacity

How full it is

Prefixes assigned
34
Prefixes available
766
Thousands-blocks assigned
165

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

Compare 324 with another code →
Sources
Wikipedia ↗
Area codes 904 and 324
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.