515 Area Code – Location map, time zone, and phone lookup

Introduction

The 515 area code covers central Iowa, anchored by Des Moines and reaching out to West Des Moines, Ankeny, Johnston, Urbandale, Waukee, and Ames. It's one of Iowa's three original area codes, in service since the 1947 launch of the North American Numbering Plan, and it has never needed a second code — every landline, mobile, and VoIP number across the region still carries the same 515 prefix.

This guide covers where 515 actually reaches, how the 641 area code split away from it in 2000, how domestic and international dialing works, the scam patterns to watch for, and why Des Moines' insurance and retail giants keep their phone numbers local instead of routing through a national line.

• Covers Des Moines, West Des Moines, Ankeny, Ames, and central Iowa since 1947
• No overlay; the 641 area code split off the rest of Iowa in July 2000
• Home to Principal Financial Group, Wellmark, Hy-Vee, Casey's, and Iowa State University

History and Coverage of the 515 Area Code

515 dates to 1947, when it was assigned as one of Iowa's original three area codes alongside 319 in the east and 712 in the west. For over 50 years it covered nearly the entire state outside those two regions. As Iowa's population and phone-line demand grew through the 1990s, regulators approved a geographic split rather than an overlay: the new 641 area code went into service on July 9, 2000, taking over north-central and south-central Iowa (communities like Mason City, Marshalltown, and Ottumwa) and leaving 515 concentrated on the Des Moines–Ames corridor it still serves today. Regulators chose a split rather than an overlay specifically to avoid forcing 10-digit dialing onto the whole region at once — a tradeoff that has held up well enough that, unlike many comparably sized metro areas, central Iowa still hasn't needed a second overlaid code more than two decades later.

• Des Moines, West Des Moines, Ankeny, Johnston, Urbandale, Waukee, and Clive
• Altoona, Ames, and Boone
• No cities outside this corridor; neighboring counties fall under 641 or 712

Unlike many growing metros, central Iowa has not needed a second code to date. There's no overlay on 515, so every number in the region, old or newly issued, still dials as a straight 10-digit 515 number. Central Iowa's population has grown steadily since the 2000 split, but wider adoption of mobile and VoIP numbers, plus more efficient number-block assignment by carriers, has kept the existing 515 supply from running out — a rarity for a metro area that has roughly doubled in size since the split. Area codes and their boundaries are tracked publicly under the North American Numbering Plan, the system that assigns and administers codes like 515 across the US, Canada, and the Caribbean. More detail sits on our Letsdial page.

How to Call a 515 Number

Domestic Calling

U.S. callers dial the full 10-digit number, area code included: 515-XXX-XXXX. Because 515 has no overlay, a 7-digit local call still works from most legacy landlines in the region, but mobile carriers and most VoIP services expect the full 10 digits regardless.

International Calling

Callers dialing in from outside the US use +1 515 XXX XXXX, with +1 representing the US and Canada country code under the NANP. Some countries require an additional international access prefix (like 00) before the +1.

Vanity and Custom Numbers

Businesses often prefer alphanumeric formats like 515-CALL-US for easier recall in ads and signage. VoIP providers can typically provision these alongside a standard 515 number. More detail sits on our Letsdial page.

Scams and Safety: Protecting Yourself from 515-Area Fraud

Common Scam Tactics

• Caller ID spoofing that displays a familiar 515 number to build false trust
• One-ring (Wangiri) calls designed to prompt an expensive callback
• Automated robocalls posing as banks, the IRS, or tech support

Staying Safe

Register with the National Do Not Call Registry, avoid calling back unfamiliar numbers, and independently verify any caller claiming to represent a bank or government agency before sharing information. Report persistent robocalls or spoofing to the FCC and FTC. Cloud phone platforms like Letsdial also build in spam labeling and call-screening tools that filter this traffic before it reaches your team.

Why Des Moines and Ames Are a Business Hub

The 515 footprint punches well above its population in corporate headquarters. Principal Financial Group, one of the largest retirement and asset-management firms in the country, is based in downtown Des Moines. Wellmark Blue Cross Blue Shield and EMC Insurance Companies are both headquartered there too, and Allied Insurance — a Des Moines company since 1929, now part of Nationwide — still runs major operations from the metro. Add Hy-Vee's corporate campus, Casey's General Stores' headquarters in Ankeny, and Iowa State University in Ames, and it's clear why so many companies want a local Des Moines presence rather than an out-of-state number. Iowa State also feeds a steady pipeline of agtech and biotech startups into the region, and most of those young companies keep a local 515 line for the same credibility reasons the larger insurers do.

Principal Financial Group's roots in the 515 footprint run back to June 24, 1879, when a group of Des Moines bankers incorporated it as Bankers Life Association — one of the earliest mutual insurers in the state. The company pioneered employer-sponsored retirement plans over the following century and now manages more than $700 billion in assets for over 62 million customers worldwide, still headquartered in the same downtown Des Moines campus its founders chose nearly 150 years ago. That kind of century-plus local continuity is common across the 515 insurance cluster, not unique to Principal alone.

Iowa State University in Ames, founded in 1858 as the Iowa Agricultural College, became one of the nation's first land-grant institutions after the Iowa Legislature accepted the 1862 Morrill Act's terms — the first state in the country to do so. It was also coeducational from its very first class in 1872, and in 1892 Elmina Wilson became the first woman in the United States to earn a civil engineering degree there, later teaching at the university before becoming a practicing structural engineer in New York City. That land-grant, engineering-focused heritage still shapes Iowa State's identity as one of the country's leading agricultural and engineering research universities today.

A 515 number signals that presence to local customers and partners. It shows up as a local call rather than an out-of-area one, which improves answer rates for outbound sales and support calls, and it reads as more established to a Des Moines customer than a number tied to a distant city.

That corporate density shows up every August at the Iowa State Fairgrounds in Des Moines, where the Iowa State Fair — dating back to 1854 and held on its current fairgrounds since 1886 — has grown into the single largest annual event in the state and one of the oldest and largest agricultural expositions in the country. The fair set an all-time attendance record in 2024 with more than 1.18 million visitors over its run, a scale that turns the 515 footprint into one of the busiest hospitality, retail, and logistics markets in the Midwest for those two weeks alone, on top of the insurance and financial-services activity that runs year-round.

Getting a Local 515 Number for Your Business

You don't have to be physically located in Des Moines to use a 515 number. VoIP platforms like Letsdial let you activate a 515 virtual number in minutes, route it to any device, and keep the same number if your business relocates or grows outside Iowa. Because the number lives in the cloud instead of on a physical line, you can forward calls to a remote team, record calls for compliance, or send after-hours calls straight to voicemail-to-email, without a phone closet anywhere in Des Moines. Existing 515 numbers can typically be ported over from a legacy carrier without any downtime or need to reprint marketing materials.

Insurance and financial-services companies calling into the 515 market face an unusually compliance-aware audience — procurement contacts at Principal, Wellmark, and the other major carriers screen unfamiliar numbers aggressively. Applying STIR/SHAKEN attestation to outbound calls, so the caller ID arrives cryptographically verified rather than flagged as Spam Risk, matters more in this market than in a less regulated one, and it's worth confirming any provider handles that automatically before committing to a 515 line. That record is published in full as North American Numbering Plan.

Conclusion

The 515 area code has covered central Iowa without an overlay since 1947, and that stability is part of why Des Moines' insurance and retail companies still treat it as core to their identity. Whether you're setting up a new business line or just trying to figure out where a call is coming from, a 515 number keeps you tied to Des Moines, Ames, and the rest of the region it has served for nearly 80 years.

Frequently Asked Questions