Area code 925 – California
925 has served California since 1998, split from 510. 640 of its 786 number blocks are allocated (81%). AT&T is the largest holder with 43.8% of blocks, ahead of Other CLEC / VoIP at 15.0%. 948 FTC complaints named a 925 caller ID in the 33 days to 30 October 2026, putting it 48th of 422 codes with five or more complaints.
- State
- California
- In service since
- 1998
- Time zone
- Pacific
- Shares area with
- No overlay
Who holds 925 number blocks
Share of the 640 assigned NXX blocks (81.4% of the 786 possible), across 32 carriers. This is share of number blocks, not of subscribers.
- AT&T43.8%
- Verizon13.4%
- T-Mobile10.5%
- Other CLEC / VoIP8.1%
- Lumen7.2%
- TPx5.8%
- Onvoy5%
- Bandwidth1.6%
- Comcast1.2%
- Spok0.8%
- Peerless0.8%
- American Messaging0.8%
- Charter0.5%
- Dish0.3%
- Telnyx0.3%
Spam complaints naming 925
FTC Do Not Call complaints where the caller ID was a 925 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 925
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 17.
Timeline
- 1998 925 goes into service, split from or overlaid on 510.
More about 925
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 925
What state is area code 925?
California.
Is a call from 925 a scam?
925 is one of the most complained-about codes in the country – 948 FTC complaints in the 33 days to 30 October 2026, 48th of 422 ranked codes. Most of those calls are spoofed: the caller fakes a local-looking number because it gets answered more often. Look up the specific number rather than judging by the code.
Which carrier owns 925 numbers?
AT&T holds the largest share of assigned number blocks at 43.8%. 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 925?
NANPA records the local dialing plan for 925 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.