319 area code
Area code 319 is in Iowa. It covers Cedar Rapids, Iowa City, Waterloo and 189 other places: 189 ZIP codes in Linn, Johnson, Black Hawk and 20 other counties. Local time there is , Central Time. In service since 1947, with no overlay.
- State
- Iowa
- Time zone
- Central
- Largest city
- Cedar Rapids
- Overlays
- none
- In service since
- 1947
- Rate centres
- 137
- Prefixes assigned
- 565 (5,650,000 numbers)
Who calls from a 319 number
NANPA records the carrier each block of 319 numbers is assigned to. Of the 4.9 million 319 numbers assigned, 40% are with local phone companies (Qwest (CenturyLink) and Windstream); 31% with cable, internet-calling, business and other carriers (Onvoy); 29% with mobile carriers (T-Mobile, Verizon Wireless and UScellular).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Qwest (CenturyLink) | Landline | 17% |
| Onvoy | Cable, VoIP, other | 13% |
| T-Mobile | Mobile | 9% |
| Verizon Wireless | Mobile | 8% |
| UScellular | Mobile | 8% |
| Windstream | Landline | 6% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 319
The 134 places with a telephone rate centre of their own using 319, largest first. Each links to its ZIP codes.
Nearby places using 319
These places have no rate centre of their own in NANPA's records; the nearest one uses 319. Near an area-code boundary that can be wrong for part of a town.
- Marion
- Coralville
- Hiawatha
- Evansdale
- Robins
- West Burlington
- University Heights
- Toddville
- Dike
- Walford
- Elk Run Heights
- Beaverdale
- Raymond
- Gilbertville
- Shueyville
- Washburn
- Middle Amana
- New Hartford
- Buckingham
- Sandusky
- Columbus City
- Middletown
- Parnell
- Stout
- Homestead
- Fredonia
- Bertram
- Watkins
- Stone City
- Dewar
- Franklin
- Mooar
- Wever
- Oak Hills
- Webster
- Westwood
- West Amana
- South Amana
- Luzerne
- Swedesburg
- Frytown
- Morrison
- Pleasant Plain
- East Amana
- Yarmouth
- Rome
- Trenton
- Sperry
- Stanley
- St. Paul
- Downey
- Lowell
- High Amana
- Cotter
- Coppock
- Augusta
- Langworthy
- Pilot Grove
ZIP codes in area code 319
189 ZIP codes in 166 towns, by the town each is mailed to, largest first. Each links to its own page.
Where 319 numbers are issued
NANPA's rate centres with the most 319 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
CEDAR RPDS | Cedar Rapids | 110 |
IOWA CITY | Iowa City | 50 |
WATERLOO | Waterloo | 47 |
BURLINGTON | Burlington | 19 |
CEDARFALLS | Cedar Falls | 13 |
FT MADISON | Fort Madison | 11 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Linn County (30)
- Johnson County (15)
- Black Hawk County (14)
- Des Moines County (8)
- Lee County (13)
- Benton County (16)
- Bremer County (7)
- Henry County (9)
- Washington County (6)
- Jones County (6)
- Buchanan County (8)
- Iowa County (13)
- Butler County (6)
- Louisa County (6)
- Grundy County (5)
- Muscatine County (3)
- Fayette County (3)
- Cedar County (2)
- Van Buren County (6)
- Tama County (4)
- Jefferson County (3)
- Keokuk County (4)
- Poweshiek County (2)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 319
Where is area code 319?
Area code 319 is in Iowa. It covers Cedar Rapids, Iowa City, Waterloo and 189 other places: 189 ZIP codes in Linn, Johnson, Black Hawk and 20 other counties.
What ZIP codes are in area code 319?
189 ZIP codes, by the town each is mailed to: Cedar Rapids (14, 52401 to 52499), Iowa City (6, 52240 to 52246), Waterloo (4, 50701 to 50704), Marion (52302) and 162 more towns. The full list is on this page.
What time zone is area code 319 in?
Central time.
Is a 319 number a mobile or a landline?
It can be either. 29% of 319 numbers are assigned to mobile carriers and 40% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
Does a 319 number mean the caller is in Iowa?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 319 call can come from anywhere.
Other area codes in Iowa
All 5 Iowa area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 319.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/319
Underlying data is public domain or openly licensed — sources, vintages and licences.