North American Numbers Source-cited · ownership disclosed
Area code
573
In service
United States · since 1996

Columbia / Jefferson City / eastern Missouri

Split from 314 in 1996 to serve eastern and southeastern Missouri outside the St. Louis metro. It is now overlaid by area code 235.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Columbia / Jefferson City / eastern Missouri
Type
geographic
Status
in service
In service since
1996
Projected exhaust
2063 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 573 is

Eastern Missouri excluding the St. Louis metro; spans roughly half the state's width including the Bootheel and Mississippi River corridor..

Communities served wholly or partly by 573:

ColumbiaJefferson CityCape GirardeauHannibalRollaSikestonPoplar Bluff
B · Relationships

How it relates to other codes

The codes 573 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 · 1996 314 St. Louis 573 split from 314, taking non-metro eastern Missouri.
Overlay · 2024 235 Eastern Missouri (overlay of 573) All-services distributed overlay over the entire 573 area.
Related · 1997 660 Northern / western Missouri Adjacent northern/western Missouri.
What's changing. Overlaid by 235 (effective March 24, 2024).
C · History

How 573 got here

1996-01-07
Created by geographic split of 314; permissive dialing through July 7, 1996.
Source: Wikipedia
2024-03-24
Area code 235 overlay took effect.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
4,096

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

Compare 573 with another code →
Sources
Wikipedia ↗
Area codes 573 and 235
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.