Area code 707 – California
707 has served California since 1959, split from 415. All but a handful of its 786 number blocks are allocated (785 of 786), so it is effectively exhausted. AT&T is the largest holder with 40.4% of blocks, ahead of Onvoy / Inteliquent at 12.2%. It shares its geography with overlay codes 369, so local calls take all ten digits. It is also among the most imitated codes in spam calls: 1,431 FTC complaints named a 707 caller ID in the 33 days to 30 October 2026, ranking 7th of 422 ranked codes. The dominant complaint type is “Other”.
- State
- California
- In service since
- 1959
- Time zone
- Pacific
- Shares area with
- 369
Who holds 707 number blocks
Share of the 785 assigned NXX blocks (99.9% of the 786 possible), across 36 carriers. This is share of number blocks, not of subscribers.
- AT&T40.4%
- Onvoy12.2%
- Verizon10.3%
- Lumen8%
- Other CLEC / VoIP7.9%
- T-Mobile7.5%
- Bandwidth3.1%
- Frontier2.9%
- Peerless2%
- TPx1.7%
- American Messaging1.1%
- Allstream1%
- Comcast0.8%
- Spok0.5%
- Dish0.3%
- Charter0.3%
Spam complaints naming 707
FTC Do Not Call complaints where the caller ID was a 707 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 707
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 75.
Timeline
- 1959 707 goes into service, split from or overlaid on 415.
More about 707
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 707
What state is area code 707?
California. It covers the same area as 369/707.
Can I still get a 707 number?
Only from recycled stock. 785 of the 786 available blocks are already allocated, so new numbers in the area normally come from the overlay codes (369/707).
Is a call from 707 a scam?
707 is one of the most complained-about codes in the country – 1,431 FTC complaints in the 33 days to 30 October 2026, 7th 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. The most reported category here is “Other”.
Which carrier owns 707 numbers?
AT&T holds the largest share of assigned number blocks at 40.4%. 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 707?
NANPA records the local dialing plan for 707 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.