North American Numbers Source-cited · ownership disclosed
Area code
319
In service
United States · since 1947

Cedar Rapids / east-central Iowa

Serves southeastern and east-central Iowa including Cedar Rapids, Iowa City and Waterloo. An original 1947 code that was split (not overlaid) in 2001.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Cedar Rapids / east-central Iowa
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2048 Q1

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 319 is

Southeastern and east-central Iowa (Linn, Johnson, Black Hawk counties and surrounding area)..

Communities served wholly or partly by 319:

Cedar RapidsIowa CityWaterlooCedar FallsBurlingtonFort MadisonKeokukMount Pleasant
B · Relationships

How it relates to other codes

The codes 319 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?

Spawned · 2001 563 Davenport / northeast Iowa 563 split from 319 in March 2001, taking the northeastern portion.
Related · 2000 641 Mason City / central-south Iowa Adjacent to the west.
What's changing. No overlay; 563 was created by geographic split, not overlay.
C · History

How 319 got here

1947
Established as one of Iowa's three original area codes, assigned to the eastern portion of the state.
Source: Wikipedia
2001-03
Geographic split became operational; northeastern portion moved to new area code 563.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
579
Prefixes available
221
Thousands-blocks assigned
2,154

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

Compare 319 with another code →
Sources
Wikipedia ↗
Area code 319
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.