North American Numbers Source-cited · ownership disclosed
Area code
507
In service
United States · since 1954

Southern Minnesota (Rochester)

Serves the southern portion of Minnesota, created in 1954 from parts of 218 and 612. In 2024 it received Minnesota's first-ever overlay, area code 924.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Southern Minnesota (Rochester)
Type
geographic
Status
in service
In service since
1954
Projected exhaust
2118 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 507 is

Southern Minnesota (150+ communities across the southern portion of the state)..

Communities served wholly or partly by 507:

RochesterMankatoWinonaOwatonnaAlbert LeaAustin

Also New Ulm, Northfield, Fairmont, Worthington.

B · Relationships

How it relates to other codes

The codes 507 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 · 1954 218 Northern Minnesota (Duluth) Formed from the southwestern portion of 218 (and the southern portion of 612).
Split from · 1954 612 Minneapolis Formed partly from the southern portion of 612.
Overlay · 2024 924 Southern Minnesota (overlay of 507) All-service overlay covering the same geography as 507.
What's changing. Overlaid by 924 (2024) — the first area code overlay complex in Minnesota. Ten-digit dialing required.
C · History

How 507 got here

1954
Created as Minnesota's third area code from the southwestern portion of 218 and the southern portion of 612.
Source: Wikipedia
2023-03-30
Minnesota PUC approved area code 924 as an all-service overlay of 507.
Source: Wikipedia
2024-08-30
New 924 numbers became assignable.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
779
Prefixes available
21
Thousands-blocks assigned
2,807

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

Compare 507 with another code →
Sources
Wikipedia ↗
Area codes 507 and 924
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.