Area Code 319

About Area Code 319

Area code 319 is a geographic telephone area code assigned to Cedar Rapids, Iowa. It operates in the Central time zone and was first introduced in 1947. Original NANP code. Eastern Iowa.

Within Iowa, area code 319 shares numbering capacity with 4 other area codes. The state's 3,205,158-person population (2023 Census Bureau estimate) is served by a combined 5 active codes, with 319 primarily responsible for the Cedar Rapids region. Iowa's state capital is Des Moines, and its largest city is Des Moines.

When you receive a call from a 319 number on your Caller ID, the call originated from a phone number assigned to the 319 area code — but be aware that Local Number Portability (in effect since 2003) means the caller could be physically located anywhere in the US or Canada. Area code 319 only confirms where the number was originally assigned.

Where is the 319 area code located?

Area code 319 is assigned to Cedar Rapids, Iowa, in the Central time zone. The state of Iowa uses 5 active area codes, and 319 is one of them. Calls placed from the 319 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 319 prefix appears on Caller ID for both landline and wireless calls placed from this region.

The Central time zone observes Daylight Saving Time, shifting from UTC-6 to UTC-5 in summer. The local time shown above is always current, so you can quickly check whether it's a reasonable hour to call back.

What cities and counties use the 319 area code?

The 319 area code serves 8 notable cities, listed below in order of population. The largest city in the 319 territory is Cedar Rapids (137,710 residents in Linn County).

• Cedar Rapids, IA — 137,710 residents (16.9% of 319 numbers)
• Des Moines, IA — 212,031 residents (26.1% of 319 numbers)
• Davenport, IA — 101,724 residents (12.5% of 319 numbers)
• Sioux City, IA — 85,797 residents (10.5% of 319 numbers)
• Iowa City, IA — 74,828 residents (9.2% of 319 numbers)
• Waterloo, IA — 66,934 residents (8.2% of 319 numbers)
• Ames, IA — 66,371 residents (8.2% of 319 numbers)
• West Des Moines, IA — 67,899 residents (8.3% of 319 numbers)

Phone number format in area code 319

All phone numbers within area code 319 follow the standard North American 10-digit format:(319) NXX-XXXX. The NXX is the central office prefix (also called an "exchange") and XXXX is the subscriber line number. For long-distance calls within the NANP, dial 1 + 319 + NXX + XXXX. From outside North America, dial your country's international access code, then 1 (the NANP country code), then the 10-digit number.

If you need to verify whether a specific 319 number is wireless, landline, or VoIP, you can use our reverse phone lookup tool. Be aware that number portability means the area code no longer guarantees the caller's physical location — only where the number was first assigned.

History of area code 319

Original NANP code. Eastern Iowa.

The original 86 area codes were assigned by AT&T and Bell Labs in 1947 as part of the North American Numbering Plan. At the time, rotary-dial phones meant codes with lower digits (like 212 for NYC, 213 for LA, 312 for Chicago) were given to the largest cities because they took less time to dial. Today's area code assignments still reflect those early choices, even though touch-tone and cell phones made the original reason obsolete.

Is the 319 area code safe to answer?

Area code 319 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 319 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.