Prefix overview
Phone numbers in prefix 510-403
This page covers the 510-403 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
510-403
RATE CENTER
FRNK OLIVR
CARRIER
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
CA
Prefix range
The prefix 510-403 includes numbers from 5104030000 to 5104039999.
This range is associated with the FRNK OLIVR rate center and was originally assigned to U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS.
Numbers in this prefix
20 numbers