Area code 319

Area code 319 at a glance

Area code 319 is a geographic area code in Iowa, in service since January 1, 1947, according to the North American Numbering Plan Administrator (NANPA). It is not part of an overlay, so every number in its territory starts with 319. It is in the Central time zone. The places with the most assigned exchanges include Cedar Rapids, Iowa City, Waterloo, Burlington, and Cedar Falls. By population, its largest named places are Cedar Rapids, Iowa City, Waterloo, Cedar Falls, and Burlington.

Cities and towns in area code 319

319 holds 21% of the 2,748 central office codes assigned in Iowa, the 4th most of the state's 5 codes. 122 Census places could be matched to rate centers with 319 exchanges; the most populous are Cedar Rapids (138,000), Iowa City (76,710), Waterloo (67,477), and Cedar Falls (41,417). Each place page lists the exact prefixes and carriers for that town.

Dialing 319 numbers

According to NANPA's dialing-plan data, local calls within 319 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at service provider discretion."

Phone companies in area code 319

86 carriers hold the 565 central office codes assigned in 319. Qwest Corporation has the most, with 99 (18%). 388 of the codes (69%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Where 319 numbers are rated

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 319 has codes in 137 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

How full is area code 319?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 565 are assigned in 319, 71% of 800. 88 were assigned in 2020 or later.

Using area code 319 for business calls

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in area code 319 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.