Introduction
If you're calling central Indiana — or thinking about a local business number there — the 317 area code is the one you'll run into first. It anchors Indianapolis and the fast-growing suburbs around it.
There's one rule that trips people up: every call in this region now needs all ten digits, even local ones. Here's why that changed, exactly which cities and counties 317 covers, and how a 317 number can give your business a real Indianapolis footprint.
WHERE THE 317 AREA CODE IS LOCATED
The 317 area code serves Indianapolis and nine surrounding counties in central Indiana. It sits in the Eastern Time Zone — EST (UTC−5) in winter, EDT (UTC−4) during daylight saving.
It's one of the original codes assigned in 1947, when the North American Numbering Plan first divided the US and Canada into regions.
Quick Facts
- State: Indiana
- Primary city: Indianapolis (state capital)
- Time zone: Eastern (EST/EDT)
- Overlay code: 463
- In service since: 1947
CITIES THE 317 AREA CODE COVERS
Indianapolis is the hub, but 317 reaches well into the suburbs — including some of Indiana's wealthiest and fastest-growing communities.
| City | County | Why it matters |
|---|---|---|
| Indianapolis | Marion | State capital, largest city in Indiana |
| Carmel | Hamilton | Top-ranked suburb, strong corporate base |
| Fishers | Hamilton | Fast-growing tech and family market |
| Noblesville | Hamilton | County seat, expanding commercial district |
| Greenwood | Johnson | Major retail corridor south of the city |
| Plainfield | Hendricks | Logistics and distribution center |
| Avon & Brownsburg | Hendricks | Growing residential suburbs |
| Westfield & Zionsville | Hamilton/Boone | Affluent, high-growth communities |
Counties in the 317 Region
The full numbering plan area covers all or part of nine counties: Marion, Hamilton, Boone, Hendricks, Hancock, Johnson, Madison, Morgan, and Shelby. Marion County, home to Indianapolis, is the core.
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THE 463 OVERLAY: WHY YOU DIAL 10 DIGITS
By the mid-2010s, central Indiana was running out of available 317 numbers. Population growth, mobile phones, and second lines exhausted the supply.
The fix was an overlay — a second code, 463, layered over the exact same geographic area. It entered service on March 15, 2016.
What the Overlay Means for You
An overlay doesn't split the region. Instead, new numbers in the area get assigned a 463 code while existing 317 numbers stay put.
The trade-off: ten-digit dialing is now mandatory. Every local call needs the area code plus the seven-digit number — no exceptions, even when you're calling a neighbor.
How Long Will 317 Numbers Last?
The added 463 capacity gave the region decades of headroom. Current projections show no further number shortage until around 2050, so a 317 or 463 number is a stable, long-term choice.
If you're weighing a local presence in the region, a 317 number still signals "established Indianapolis business" far better than a generic toll-free line. MCM can check live 317 availability for you in under a minute.
WHY A 317 NUMBER IS GOOD FOR BUSINESS
A local area code is quiet credibility. Indianapolis customers are measurably more likely to answer — and trust — a call from a familiar 317 number.
It tells them you're part of the community, not a faraway call center.
The Indianapolis Market Behind the Code
Central Indiana is a serious business region. Indianapolis alone has more than 880,000 residents, with a young median age near 34 and steady suburban growth in Hamilton and Hendricks counties.
The economy leans on healthcare and life sciences, advanced manufacturing, logistics, and a growing tech sector — all industries that run on reliable phone communication.
You Don't Need a Physical Office
Here's the part that surprises people: you can get a 317 number without renting space in Indianapolis. A virtual number routes 317 calls to any phone, anywhere.
That makes it a low-risk way to test the central Indiana market — or serve it remotely. See our guide to virtual phone numbers for small business for how that works.
HOW TO GET A 317 AREA CODE NUMBER
Claiming a local Indianapolis number is a short process — no carrier visit, no long contract.
Step 1: Search Available Numbers
On the My Country Mobile (MCM) site, open the Phone Numbers tool and search "317." You'll see live availability for the Indianapolis region.
Step 2: Pick a Number That Fits
Browse the options and choose one that's easy to say and remember. A clean number is worth the extra few seconds of searching.
Step 3: Set Up Call Routing
Decide where 317 calls should ring — your mobile, a desk phone, or a team. You can add voicemail, an IVR menu, and business hours in the same step.
Step 4: Activate and Test
Complete checkout and your 317 number goes live. Place a test call so you know routing works before you publish the number.
WHAT TO DO NEXT
The 317 area code is more than a label for Indianapolis — it's a practical asset. It earns local trust, it's backed by decades of numbering capacity, and you don't need an office in Indiana to use one.
Run a quick availability search before you commit to any number for your central Indiana presence. Five minutes of searching gets you a number you'll keep for years.
Ready to claim one? Check live 317 availability with MCM — local numbers, flexible call routing, no setup fees and no contract.
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FAQs
What area code is 317?
The 317 area code covers Indianapolis and nine surrounding counties in central Indiana. It's one of the original 1947 area codes and sits in the Eastern Time Zone.
Do I need to dial the area code for local calls in the 317 region?
Yes. Since the 463 overlay launched in 2016, ten-digit dialing is mandatory. Every call in the region — even local ones — needs the area code plus the seven-digit number.
What is the 463 area code?
463 is an overlay for the same geographic area as 317. It was added in 2016 to supply new numbers after 317 ran low. Existing 317 numbers were not changed.
Which cities use the 317 area code?
Indianapolis is the main city, along with Carmel, Fishers, Noblesville, Greenwood, Plainfield, Avon, Brownsburg, Westfield, and Zionsville, among others.
What time zone is the 317 area code in?
Eastern Time. That's EST (UTC−5) during standard time and EDT (UTC−4) during daylight saving time.
Can I get a 317 number without living in Indianapolis?
Yes. A virtual 317 number can be set up from anywhere and routed to any phone. You get a local Indianapolis presence without a physical office.
Is the 317 area code running out of numbers?
Not for a long time. The 463 overlay added enough capacity that the region isn't projected to need another code until roughly 2050.
