San Mateo, California Phone Lookup
Find the owner of any phone number in San Mateo, California.
What Phone Numbers Are in San Mateo, California?
Looking up a phone number in San Mateo, California? Enter any 10-digit phone number in the search box above to find the owner's name, address, and carrier information. San Mateo is served by 1 area code and has 125 active phone prefixes.
Area Codes Serving San Mateo
Phone numbers in San Mateo, California use the following area code: 650.
Top Phone Carriers in San Mateo
The most common phone service providers in San Mateo include:
- Pacific Bell
- T-mobile Usa, Inc.
- Onvoy, Llc - Ca
- Cellco Partnership Dba Verizon Wireless - Ca
- New Cingular Wireless Pcs, Llc
Data current as of March 2026
Nearby Cities in California
Other cities in California that share area codes with San Mateo:
- BIEBER
- Half Moon Bay
- LA HONDA
- Los Altos
- Menlo Park
- Millbrae
- MOSS BEACH
- Mountain View
- Pacifica
- Palo Alto
- PESCADERO
San Mateo at a Glance
Demographics
- White 37.9%
- Black 1.4%
- Hispanic 27.6%
- Asian 28.3%
- Other 4.7%
Financial Profile
Frequently Asked Questions
What Area Codes Serve San Mateo, California?
Phone numbers in San Mateo, California use 1 area code: 650. These area codes are shared with other cities in the region. San Mateo has 125 active phone prefixes assigned to local carriers. If you received a call from one of these area codes, enter the full 10-digit number into the search box above to find out who called. The area code alone tells you the general geographic region, but a full reverse phone lookup on 411FCC reveals the specific owner, carrier, and line type associated with the number.
How Do I Look Up a Phone Number in San Mateo, California?
To look up any phone number in San Mateo, enter the full 10-digit number into the search box at the top of this page and click Search. 411FCC returns available information about the number including the registered owner's name, location, phone carrier, and whether it is a wireless cell phone, landline, or VoIP line. The lookup covers all 1 area code serving San Mateo and works for numbers from every carrier in the area. Results appear within seconds. 411FCC has maintained its phone number database since 2003.
What Types of Phone Numbers Are in San Mateo?
San Mateo, California has both wireless and landline phone numbers. Approximately 34% of phone prefixes in the area are classified as wireless (cell phone), with the remaining 66% being landline or VoIP. Major carriers serving the area include Pacific Bell, T-mobile Usa, Inc., Onvoy, Llc - Ca. When you search a phone number on 411FCC, the results identify the line type and carrier, which helps distinguish personal cell phones from business landlines and identify VoIP numbers commonly used by automated calling systems.