- City / exchange
- La Mesa
- Province / state
- California
- Country
- United States
- Carrier
- New Cingular Wireless Pcs, LLC
- Line type
- Likely mobile
- OCN
- 6010
- Status
- In Service
- Assigned
- 08/22/2025
- Number pooling
- Yes (block shared between carriers)
858-440 phone numbers
La Mesa, California, United States · New Cingular Wireless Pcs, LLC
Reported numbers in 858-440
No numbers in this block have been reported by visitors yet.
What does the 858-440 prefix tell you?
Every North American number is area code + prefix + line. The prefix 858-440 was assigned to New Cingular Wireless Pcs, LLC on 08/22/2025 for the La Mesa exchange. A call from this block usually originates from a New Cingular Wireless Pcs, LLC customer in or near La Mesa, but caller ID can be spoofed to show any number.