Area code 341 – California
341 has served California since 2019, split from 510. It is still largely empty: 113 of 786 number blocks allocated. Other CLEC / VoIP is the largest holder with 39.8% of blocks, ahead of Onvoy / Inteliquent at 21.2%. It shares its geography with overlay codes 510, so local calls take all ten digits. Spam complaints are comparatively rare: 220 in the 33 days to 30 October 2026, 331st of the 422 codes with five or more complaints.
- State
- California
- In service since
- 2019
- Time zone
- Pacific
- Shares area with
- 510
Who holds 341 number blocks
Share of the 113 assigned NXX blocks (14.4% of the 786 possible), across 16 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP38.9%
- Onvoy21.2%
- AT&T12.4%
- T-Mobile10.6%
- Bandwidth7.1%
- Verizon4.4%
- Telnyx1.8%
- Charter1.8%
- Comcast0.9%
- TPx0.9%
Spam complaints naming 341
FTC Do Not Call complaints where the caller ID was a 341 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 341
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 13.
Timeline
- 2019 341 goes into service, split from or overlaid on 510.
More about 341
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 341
What state is area code 341?
California. It covers the same area as 341/510.
Is a call from 341 a scam?
Not by itself. 341 drew 220 FTC complaints in the 33 days to 30 October 2026, 331st 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 341 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 39.8%. 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 341?
NANPA records the local dialing plan for 341 as “1+10D”.
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: “1+10D”. Reviewed by the data desk. Spotted an error? Request a correction.