- City / exchange
- San Marcos
- Province / state
- California
- Country
- United States
- Carrier
- Cellco Partnership dba Verizon Wireless - CA
- Line type
- Likely mobile
- OCN
- 6006
- Status
- Assigned
- Assigned
- 09/02/2026
- Number pooling
- Yes (block shared between carriers)
442-503 phone numbers
San Marcos, California, United States · Cellco Partnership dba Verizon Wireless - CA
Reported numbers in 442-503
No numbers in this block have been reported by visitors yet.
What does the 442-503 prefix tell you?
Every North American number is area code + prefix + line. The prefix 442-503 was assigned to Cellco Partnership dba Verizon Wireless - CA on 09/02/2026 for the San Marcos exchange. A call from this block usually originates from a Cellco Partnership dba Verizon Wireless - CA customer in or near San Marcos, but caller ID can be spoofed to show any number.