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Area code Verified Nov 1, 2026 · Source: NANPA

Area code 815 – Illinois

815 is one of the original area codes, in service across Illinois since 1947. All but a handful of its 786 number blocks are allocated (786 of 786), so it is effectively exhausted. No carrier dominates: AT&T 28.9%, Frontier 20.4%, Other CLEC / VoIP 14.0%. It shares its geography with overlay codes 779, so local calls take all ten digits. 915 FTC complaints named a 815 caller ID in the 33 days to 30 October 2026, putting it 58th of 422 codes with five or more complaints. Numbers are spread across 200 rate centers, which is typical of a mostly rural code.

State
Illinois
In service since
1947
Time zone
Central
Shares area with
779

Who holds 815 number blocks

Share of the 786 assigned NXX blocks (100% of the 786 possible), across 53 carriers. This is share of number blocks, not of subscribers.

  • AT&T28.9%
  • Frontier20.4%
  • Other CLEC / VoIP17.2%
  • Lumen10.2%
  • Verizon7.8%
  • T-Mobile7.3%
  • Onvoy1.3%
  • Windstream1.1%
  • Spok1.1%
  • Brightspeed1.1%
  • Comcast0.9%
  • Charter0.8%
  • Bandwidth0.6%
  • American Messaging0.6%
  • Peerless0.3%
  • Telnyx0.1%
  • TDS0.1%
  • VoIP Innovations0.1%
  • Vonage0.1%

Spam complaints naming 815

FTC Do Not Call complaints where the caller ID was a 815 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.

915 complaints in 33 days
#58 of 422 ranked codes

Rate centers in 815

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 200.

ROCKFORD89
JOLIET62
KANKAKEE33
WOODSTOCK28
DE KALB24

Timeline

  1. 1947 815 assigned in the original North American Numbering Plan.

More about 815

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 786 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 815 vs 779 Same area, different code – age, capacity and complaints side by side

Frequently asked about 815

What state is area code 815?

Illinois. It covers the same area as 779/815.

Can I still get a 815 number?

Only from recycled stock. 786 of the 786 available blocks are already allocated, so new numbers in the area normally come from the overlay codes (779/815).

Is a call from 815 a scam?

Not by itself. 815 drew 915 FTC complaints in the 33 days to 30 October 2026, 58th 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 815 numbers?

AT&T holds the largest share of assigned number blocks at 28.9%. 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 815?

NANPA records the local dialing plan for 815 as “1+10D”.

Sources and verification

NANPA dialing note for this code: “1+10D”. Reviewed by the data desk. Spotted an error? Request a correction.

Nearby and related

779 Illinois