317 Area Code: Indianapolis, IN — Location & Guide

The 317 area code is Indianapolis — and Indianapolis is one of the most underrated economic and cultural powerhouses in the United States. It is the heart of a $199 billion metro economy, the home of the world's largest single-day sporting event, a global life sciences hub anchored by Eli Lilly and Company, and a city surrounded by some of the fastest-growing suburbs in the entire Midwest. The 317 area code has served central Indiana since 1947, making it one of America's original area codes — and in 2016, it gained a companion code, 463, whose digits spell "IND" on a telephone keypad as a permanent nod to Indiana.

Whether you are a business looking to establish a local presence in the Indianapolis market, someone who received a call from a 317 number, or a researcher wanting the full picture of what this area code covers, this guide gives you everything — from the complete history and cities served, to the economy, the culture, and exactly how to get a 317 number of your own.

What Is the 317 Area Code?

The 317 area code is a telephone area code in the North American Numbering Plan (NANP) serving Indianapolis and the surrounding central Indiana metropolitan area. It covers nine counties — Marion, Boone, Hancock, Hamilton, Hendricks, Johnson, Madison, Morgan, and Shelby — and encompasses the state capital, Indianapolis, along with dozens of suburban communities that together form one of the Midwest's most dynamic metro regions.

Since March 15, 2016, the 317 area code has shared its territory with the 463 overlay area code. Both codes serve the exact same nine-county geographic region. Area code 463 was specifically chosen because it spells "IND" on a standard telephone keypad — a deliberate tribute to Indiana and Indianapolis. Because of the overlay, all local calls within the 317/463 territory require mandatory 10-digit dialing, which took full effect on October 15, 2016.

The entire 317 area code location falls within the Eastern Time Zone (ET) — Eastern Standard Time (EST, UTC−5) in winter and Eastern Daylight Time (EDT, UTC−4) during daylight saving time.

317 Area Code Quick Facts

The History of Area Code 317

The 317 area code has one of the longest continuous service histories of any area code in the United States — it has served central Indiana for nearly 80 years, and for 48 of those years it remained essentially unchanged, a remarkable feat in the fast-moving world of telephone numbering.

1947 — One of America's Original Area Codes

When AT&T's engineers established the North American Numbering Plan in 1947, Indiana was divided into two area codes. The northern two-thirds of the state — including Indianapolis — received area code 317. Indiana's southern third was assigned area code 812. From the very first day the NANP took effect on January 1, 1947, the 317 area code began serving Hoosiers.

1948 — Northern Indiana Split to Create 219

Just one year after launching, the 317 territory was reduced. In 1948, the northern portion of Indiana — covering Gary, South Bend, Fort Wayne, and the Indiana portion of the Chicago metro area — was split off to form area code 219. After this split, the 317 area code covered central Indiana, with Indianapolis at its center. This boundary remained stable for nearly half a century.

1997 — Area Code 765 Split from 317

By the mid-1990s, the explosion of mobile phones, pagers, fax machines, and internet dial-up modems had consumed enormous numbers of telephone numbers, pushing the 317 territory toward exhaustion. On February 1, 1997, area code 765 was created from the outer portions of the 317 territory — covering Terre Haute, Muncie, Lafayette, Anderson, and other communities outside the inner ring of the Indianapolis metro area. After this split, 317 was focused exclusively on Indianapolis and its closest surrounding counties.

2016 — The 463 Overlay and 10-Digit Dialing

The rapid growth of Indianapolis and its suburbs — combined with the proliferation of smartphones, VoIP lines, and IoT devices — eventually exhausted the remaining number capacity in the 317 territory. Rather than perform another geographic split (which would force thousands of businesses and residents to change their numbers), regulators chose an overlay approach.

On March 15, 2016, area code 463 entered service as an overlay to 317, covering the identical nine-county territory. The choice of 463 was intentional: on an alphanumeric telephone keypad, 4-6-3 spells "IND" — a permanent reference to Indianapolis and Indiana embedded in the area code itself. Mandatory 10-digit dialing took effect on October 15, 2016 (extended from the original September 15 deadline to give security alarm companies time to update their programmed dialing equipment).

Complete 317 Area Code Timeline

Counties & Cities Covered by the 317 Area Code

The 317 area code covers nine counties in central Indiana, with Indianapolis's Marion County at its core and eight surrounding counties completing the metro ring. Together, these nine counties form the Indianapolis–Carmel–Anderson Metropolitan Statistical Area, one of the fastest-growing large metros in the Midwest.

Major Cities and Communities

Nine Counties in the 317/463 Territory

Neighboring Area Codes

The Economy Behind the 317 Area Code

The 317 area code region is the economic engine of Indiana. With a metro GDP of approximately $199.2 billion, Indianapolis ranks among the top 30 largest metro economies in the United States. The region's unemployment rate fell to just 3.3% as of August 2025 — well below the national average of 4.3% — and the metro added thousands of jobs across its key growth sectors.

Life Sciences: A Global Pharmaceutical Hub

Indianapolis is one of the most important life sciences cities in the world. The region hosts a life sciences cluster of approximately 350 companies employing around 29,000 people — and at its center is one of the world's largest pharmaceutical companies:

• Eli Lilly and Company — headquartered in Indianapolis since its founding in 1876. Eli Lilly is one of the world's top pharmaceutical companies and the single largest private employer in the 317 region. Chemical manufacturing (dominated by pharmaceutical production) grew 6.0% in the Indianapolis metro between August 2024 and August 2025.
• Roche Diagnostics — significant Indianapolis operations in the diagnostics and medical devices space.
• IU Health / Eskenazi Health — major hospital systems providing both healthcare services and life sciences employment.

Technology and Professional Services

The Indianapolis tech sector has grown rapidly, with professional, scientific, and technical services employment growing 4.8% in the metro area between August 2024 and August 2025. North Carolina's 919 area code is a peer tech-and-research hub driving similar growth. Key tech employers include:

• Salesforce — maintains a significant Indianapolis presence with approximately 1,500 local employees; the Salesforce Tower dominates the Indianapolis skyline
• Launch Fishers — one of the nation's leading startup hubs, based in Fishers, nurturing dozens of tech companies and entrepreneurs
• Cummins Inc. — global engine and power technology company headquartered in Columbus, Indiana with major Indianapolis-area operations

Logistics, Manufacturing, and Motorsports

Indianapolis sits at the geographic center of the United States and at the intersection of multiple major interstate highways — a logistics advantage that has attracted enormous distribution and manufacturing operations:

• Amazon — major fulfillment and delivery operations in the Indianapolis metro, particularly in Plainfield and Hendricks County
• FedEx — major hub operations leveraging Indianapolis's central location
• Allison Transmission — Indianapolis headquarters and manufacturing, employing approximately 3,100 people
• Rolls-Royce — major aerospace components manufacturing in Indianapolis

Key Industries in the 317 Region

317 in Sports & Culture: The Racing Capital of the World

No area code in the Midwest can match the sporting legacy of 317. Indianapolis has built an identity around athletic excellence and spectacle that draws millions of visitors and billions in economic impact every single year.

The Indianapolis 500: The Greatest Spectacle in Racing

Every May, more than 300,000 people make the pilgrimage to Indianapolis for the Indianapolis 500 — the largest single-day sporting event in the history of the world. Held at the Indianapolis Motor Speedway in Speedway, Indiana (within the 317 area code), the Indy 500 has run continuously since its inaugural race in 1911, making the Speedway the oldest continuously operating major racetrack in the United States. A few remarkable facts:

• The Indianapolis Motor Speedway is the largest sports venue in the world by seating capacity, with room for over 250,000 seated spectators and up to 300,000+ total attendees
• The original track was paved with 3.2 million bricks — earning it the nickname "The Brickyard." Today, a single strip of the original brick surface is preserved at the start/finish line
• Since 1936, winners have celebrated by drinking milk at the finish line — one of the most distinctive traditions in all of sports
• Indianapolis also hosts the Brickyard 400 NASCAR race and the MotoGP Grand Prix of the Americas at the same venue

Professional Sports Teams

A City Built for Major Events

Since 1980, Indianapolis has hosted more than 500 national and international sporting events, including Super Bowl XLVI (2012), the 1987 Pan American Games, multiple NCAA Final Fours, the Big Ten Championship, and the College Football Playoff. The city's deliberate investment in world-class venues and event infrastructure has made it one of the premier sports destinations in North America — and the 317 area code is at the center of all of it.

Virtual Phone Number vs. Traditional Landline

If you need a 317 area code phone number, you have two main paths: a traditional carrier-assigned number, or a cloud-based virtual phone number. For most businesses today — especially those operating outside Indiana who need a local Indianapolis presence — virtual numbers deliver clear advantages.

Why Your Business Needs a 317 Area Code Number

A 317 area code number gives your business immediate local presence in one of the fastest-growing and most economically productive metro markets in the Midwest. Here is why it matters:

• Access a 2.14 million-person metro market: The Indianapolis metro area has a population of approximately 2.14 million and has grown by roughly 85,000 people per year since 2020 — bringing in new consumers, businesses, and opportunities at a faster rate than most comparable US metros.
• Higher call-answer rates: Local area code numbers are consistently answered at higher rates than toll-free or out-of-state numbers. A 317 number tells Indianapolis-area customers that you are local — and Hoosiers support local.
• Life sciences and pharma market access: With 350+ life sciences companies and 29,000 industry jobs, Indianapolis is a top target for healthcare IT, laboratory services, medical devices, and pharmaceutical support businesses. A local 317 number is essential for credibility in this community.
• Fast-growing suburbs are your market too: Boone County grew 13.2% in population over the past five years — the fastest rate in Indiana. Carmel, Fishers, and Westfield are all experiencing rapid growth in high-income households. A 317 number reaches all of them.
• Logistics and events market: Indianapolis's position as a central US logistics hub and sports/convention event destination creates consistent demand from companies needing local coordination. A 317 presence signals you are part of the community, not a distant vendor. The Southeast's own logistics and financial hub, covered by the 704 area code in Charlotte, shows a similar pattern of regional numbers building local trust.
• No Indiana office required: With a Callmama virtual 317 number, you get all the credibility of an Indianapolis local number without a lease, a receptionist, or any physical infrastructure.

How to Get a 317 Area Code Number

Getting a 317 area code phone number through Callmama takes just a few minutes and requires no physical presence in Indiana. Follow these steps:

1. Download the Callmama app — available for iOS (App Store) and Android (Google Play), or access via web browser.
2. Create your account — sign up with your email address and complete a quick identity verification. No Indiana address is needed.
3. Search for a 317 number — use the number search tool, filter by area code 317, and browse available numbers. Search for a memorable pattern if you want a distinctive number.
4. Select your plan — choose a subscription plan that fits your call volume and feature needs.
5. Activate and configure — set up call forwarding to your existing mobile or landline, configure voicemail, and add team members if needed.
6. Start making and receiving calls — your 317 number is live immediately and works on any smartphone, tablet, or computer.

Features of Your 317 Virtual Number

• Call forwarding — route incoming calls to any device or number
• Voicemail to email — receive voicemail transcripts and audio files by email
• SMS / text messaging — send and receive text messages from your 317 number
• IVR / auto-attendant — professional call menus for businesses
• Call recording — record calls for compliance or quality assurance
• International calling — competitive rates to call anywhere in the world
• Multiple devices — use your 317 number on your phone, laptop, or tablet simultaneously
• Number portability — bring your existing number to Callmama or take your new 317 number with you if you ever switch providers

How to Dial a 317 Area Code Number

Since October 15, 2016, all calls within the 317/463 numbering plan area require 10-digit dialing — including local calls, consistent with the FCC guidelines on overlay area codes. Calls dialed with only 7 digits will not connect. Here is how dialing works in every situation:

Note: If you have older equipment — business phone systems, security alarms, fax machines, or elevator emergency phones — programmed to dial local numbers with only 7 digits, update them to use 10-digit dialing. 7-digit calls in the 317/463 area have not connected since October 2016.

Is the 317 Area Code a Scam?

The 317 area code is a legitimate geographic area code serving Indianapolis and central Indiana. Most 317 calls come from real residents, businesses, and organizations in the Indianapolis metro area. However, scammers frequently spoof 317 numbers — using technology to make their calls appear to originate from a local Indianapolis number, even when the caller is located elsewhere entirely.

Common 317 Area Code Scams

How to Protect Yourself

• Do not trust caller ID alone. Spoofing technology makes any number displayable on caller ID. A 317 prefix does not guarantee the caller is in Indianapolis or Indiana.
• Never act on urgency. Scammers engineer time pressure to prevent clear thinking. Any caller demanding immediate payment or threatening arrest is almost certainly a scammer.
• Hang up and call back on the official number. If someone claims to be from a government agency, utility, or company, end the call and dial the number listed on the official website or your billing statement.
• Report scam calls. File reports with the FTC at reportfraud.ftc.gov and with the Indiana Attorney General at indianaconsumer.com. Reports help protect other Hoosiers from the same scammers.
• Use call-blocking tools. Hiya, Nomorobo, and your carrier's built-in spam protection can flag or block known scam numbers before your phone rings.

Conclusion

The 317 area code represents one of America's most dynamic and underappreciated metro markets. Since its creation in 1947, it has grown from a statewide Indiana code into the focused identifier of a $199 billion metro economy — one that produces world-class pharmaceuticals, powers global logistics networks, hosts the greatest racing spectacle on earth, and attracts tens of thousands of new residents every year to its rapidly growing suburbs.

The 2016 arrival of the 463 overlay — whose digits deliberately spell "IND" — and the shift to mandatory 10-digit dialing marked a new chapter for the 317 territory, reflecting the metro's growth and its demand for more phone numbers than the original code could supply.

For businesses, a 317 area code virtual number from Callmama delivers immediate Indianapolis credibility — with no Indiana address required, no hardware to install, and no long-term commitment. In a market growing by 85,000 people a year, having a local number is not just a nice-to-have. It is a competitive necessity.