Michigan · Eastern Time
517 Area Code
Area code 517 is in Michigan, serving south-central Michigan including Lansing, Jackson and Adrian. It is in the Eastern Time zone.
Last updated October 1, 2026 · Source: NANPA
Where is the 517 area code?
517 is a Michigan area code covering south-central Michigan including Lansing, Jackson and Adrian. In the wider directory it sits in the Midwest region.
Cities in the 517 area code
- Lansing
- East Lansing
- Jackson
- Adrian
- Howell
- Mason
- Charlotte
- Grand Ledge
- Coldwater
- Hillsdale
- Tecumseh
- Williamston
Counties served by 517
Ingham County, Jackson County, Eaton County, Lenawee County, Livingston County, Hillsdale County and Branch County.
Time zone note: Eastern statewide except four Upper Peninsula counties near Wisconsin (Central).
Dialing 517
Lansing, MI is currently served by the single area code 517, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
From outside the US, dial +1 517 followed by the seven-digit number.
History of the 517 area code
517 is one of the original area codes assigned in 1947, when AT&T and Bell Laboratories created the North American Numbering Plan and divided the country into the first 86 numbering plan areas. It has served the Lansing area ever since.
Is 517 a scam or spam risk?
517 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 517 number on your screen is no guarantee the caller is in Lansing, MI or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Michigan area codes
Explore more
See every code in Michigan, compare codes across the Midwest region, or view all Eastern Time codes. You can also browse the 5XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
517 area code FAQ
Where is the 517 area code?
The 517 area code is in Michigan, covering south-central Michigan including Lansing, Jackson and Adrian, in the Midwest region.
What cities are in the 517 area code?
Cities in the 517 area code include Lansing, East Lansing, Jackson, Adrian, Howell, Mason, Charlotte, Grand Ledge, Coldwater and Hillsdale.
What time zone is 517 in?
517 is in the Eastern Time zone. Eastern statewide except four Upper Peninsula counties near Wisconsin (Central).
When did the 517 area code start?
517 went into service on January 1, 1947 as one of the original 1947 North American area codes.
Do I have to dial 10 digits for 517?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 517 a toll-free or premium code?
No. 517 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.