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Area code Verified Nov 1, 2026 · Source: NANPA

Area code 517 – Michigan

517 is one of the original area codes, in service across Michigan since 1947. 616 of its 786 number blocks are allocated (78%). No carrier dominates: Other CLEC / VoIP 27.9%, AT&T 25.6%, Verizon 12.7%. FTC complaints naming a 517 caller ID totalled 627 in the 33 days to 30 October 2026 (164th of 422 ranked codes).

State
Michigan
In service since
1947
Time zone
Eastern
Shares area with
No overlay

Who holds 517 number blocks

Share of the 616 assigned NXX blocks (78.4% of the 786 possible), across 59 carriers. This is share of number blocks, not of subscribers.

  • AT&T25.6%
  • Other CLEC / VoIP24.4%
  • Verizon12.7%
  • Frontier9.1%
  • T-Mobile8.6%
  • Lumen5.4%
  • Onvoy4.9%
  • American Messaging1.6%
  • Spok1.5%
  • Windstream1.5%
  • Bandwidth1.1%
  • Comcast1%
  • Charter1%
  • Brightspeed0.5%
  • Peerless0.3%
  • VoIP Innovations0.3%
  • Twilio0.3%
  • Dish0.2%
  • Vonage0.2%

Spam complaints naming 517

FTC Do Not Call complaints where the caller ID was a 517 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.

627 complaints in 33 days
#164 of 422 ranked codes

Rate centers in 517

NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 78.

LANSING164
JACKSON63
ADRIAN27
HOWELL27
HILLSDALE15

Timeline

  1. 1947 517 assigned in the original North American Numbering Plan.

More about 517

Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.

All prefixes Every one of the 616 assigned NXX blocks, with the holder of each Local time Zone, UTC offset, clock changes and a live clock Spam complaints How often the code appears in FTC complaints, and what to do Carriers Who holds the number blocks, and why that is not who serves them

Frequently asked about 517

What state is area code 517?

Michigan.

Is a call from 517 a scam?

Not by itself. 517 drew 627 FTC complaints in the 33 days to 30 October 2026, 164th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.

Which carrier owns 517 numbers?

Other CLEC / VoIP holds the largest share of assigned number blocks at 27.9%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.

Do I need to dial 10 digits in 517?

No. NANPA records 517 as 7-digit dialing for local calls.

Sources and verification

NANPA dialing note for this code: “7D”. Reviewed by the data desk. Spotted an error? Request a correction.