- City / exchange
- San Mateo
- Province / state
- California
- Country
- United States
- Carrier
- Onvoy, LLC - CA
- Line type
- Likely VoIP / virtual number
- OCN
- 649C
- Status
- Assigned
- Assigned
- 06/01/2026
- Number pooling
- Yes (block shared between carriers)
650-778 phone numbers
San Mateo, California, United States · Onvoy, LLC - CA
Reported numbers in 650-778
No numbers in this block have been reported by visitors yet.
What does the 650-778 prefix tell you?
Every North American number is area code + prefix + line. The prefix 650-778 was assigned to Onvoy, LLC - CA on 06/01/2026 for the San Mateo exchange. A call from this block usually originates from a Onvoy, LLC - CA customer in or near San Mateo, but caller ID can be spoofed to show any number.
Other San Mateo prefixes in 650
650-200650-202650-212650-217650-218650-222650-227650-235650-240650-242650-245650-274650-281650-286650-287650-288650-292650-293650-294650-295650-312650-315650-340650-341650-342650-343650-344650-345650-346650-347650-348650-349650-350650-356650-357650-358650-371650-372650-373650-375650-376650-377650-378650-389650-393650-398650-401650-403650-418650-425650-430650-431650-432650-435650-436650-437650-445650-458650-477650-483