Area code 660 – Missouri
660 has served Missouri since 1997, split from 816. 518 of its 786 number blocks are allocated (66%). Other CLEC / VoIP is the largest holder with 35.7% of blocks, ahead of Lumen / CenturyLink at 21.2%. Spam complaints are comparatively rare: 295 in the 33 days to 30 October 2026, 305th of the 422 codes with five or more complaints. Numbers are spread across 224 rate centers, which is typical of a mostly rural code.
- State
- Missouri
- In service since
- 1997
- Time zone
- Central
- Shares area with
- No overlay
Who holds 660 number blocks
Share of the 518 assigned NXX blocks (65.9% of the 786 possible), across 53 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP32.2%
- Lumen21.2%
- AT&T15.1%
- Onvoy7.9%
- Verizon6.6%
- T-Mobile5.2%
- Windstream5%
- Brightspeed3.9%
- Bandwidth1.2%
- Charter0.8%
- Peerless0.6%
- Consolidated0.2%
- Telnyx0.2%
Spam complaints naming 660
FTC Do Not Call complaints where the caller ID was a 660 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.
Rate centers in 660
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 224.
Timeline
- 1997 660 goes into service, split from or overlaid on 816.
More about 660
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.
Frequently asked about 660
What state is area code 660?
Missouri.
Is a call from 660 a scam?
Not by itself. 660 drew 295 FTC complaints in the 33 days to 30 October 2026, 305th 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 660 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 35.7%. 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 660?
Yes – ten digits for local calls in 660, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.