Area code 508 – Massachusetts
508 has served Massachusetts since 1988, split from 617. 749 of its 786 number blocks are allocated – about 95% full. Verizon is the largest holder with 53.0% of blocks, ahead of Other CLEC / VoIP at 19.1%. It shares its geography with overlay codes 774, so local calls take all ten digits. FTC complaints naming a 508 caller ID totalled 508 in the 33 days to 30 October 2026 (208th of 422 ranked codes).
- State
- Massachusetts
- In service since
- 1988
- Time zone
- Eastern
- Shares area with
- 774
Who holds 508 number blocks
Share of the 749 assigned NXX blocks (95.3% of the 786 possible), across 22 carriers. This is share of number blocks, not of subscribers.
- Verizon53%
- AT&T13.8%
- Windstream8.9%
- Lumen8%
- T-Mobile5.3%
- Other CLEC / VoIP4.4%
- Comcast2.8%
- Bandwidth1.6%
- Onvoy1.2%
- American Messaging0.5%
- Charter0.4%
Spam complaints naming 508
FTC Do Not Call complaints where the caller ID was a 508 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 508
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 94.
Timeline
- 1988 508 goes into service, split from or overlaid on 617.
More about 508
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 508
What state is area code 508?
Massachusetts. It covers the same area as 508/774.
Is a call from 508 a scam?
Not by itself. 508 drew 508 FTC complaints in the 33 days to 30 October 2026, 208th 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 508 numbers?
Verizon holds the largest share of assigned number blocks at 53.0%. 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 508?
Yes – ten digits for local calls in 508, 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.