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Area code 319

Area code 319 Cedar Rapids, Iowa

Area code 319 is one of the original 1947 area codes, in Iowa, with numbers assigned in Cedar Rapids, Iowa City, Waterloo and 130 more places. It’s 11:13 PM there now.

State
Iowa5 area codes in Iowa
Time zone
Central11:13 PM there now
Exchanges
565133 places
Overlay
NoneThe only code for its area
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Where area code 319 is

Numbers in 319 are assigned to 133 places in 24 counties: Linn County, Johnson County, Black Hawk County, Lee County, Washington County, Benton County, plus 18 more.

No single place dominates: Cedar Rapids, the largest, has 19% of the exchanges.

  • Cedar Rapids110
  • Iowa City50
  • Waterloo47
  • Burlington19
  • Cedar Falls13
  • Fort Madison11
  • Mount Pleasant10
  • Washington10
  • Anamosa9
  • Keokuk9
  • Oelwein7
  • Vinton6
  • Independence6
  • Keosauqua6
  • Waverly6
  • North Liberty6
  • Columbus Junction5
  • Grundy Center5
  • Brighton5
  • Parkersburg5
  • Mount Vernon4
  • Center Point4
  • Monticello4
  • Williamsburg4

Phone companies in 319

565 blocks of numbers in 319 are held by 80 phone companies. The most belong to Lumen (CenturyLink) (103), Windstream (65) and T-Mobile (40).

A mix: about 24% wireless, 47% local phone and cable and 29% other carriers, including internet phone services.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

319 has been in service since 1947, when the first North American area codes were set up.

77 new exchanges were assigned since 2021, the latest in March 2026.

Calling 319

It’s 11:13 PM Central time in 319 right now.

From elsewhere in the U.S., dial 1, 319 and the 7-digit number.

Nearby area codes

Iowa has 5 area codes: 319, 515, 563, 641 and 712.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 319 area code

Map of the 319 area code around Cedar Rapids, Iowa City and Waterloo, Iowa.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 319

Where is area code 319?

In Iowa, covering Cedar Rapids, Iowa City and Waterloo and other places across 24 counties.

What time zone is 319 in?

Central time. It was 11:13 PM there when this page loaded.

Is 319 an overlay?

No. 319 is the only area code for its area right now.

Which phone companies have 319 numbers?

80 companies hold blocks; the most belong to Lumen (CenturyLink), Windstream and T-Mobile. About 24% of blocks are wireless.

Is 319 running out of numbers?

Not on record. 77 new exchanges have been assigned since 2021.