Prefix overview
Phone numbers in prefix 510-400
This page covers the 510-400 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
510-400
RATE CENTER
FRNK GRNLF
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
CA
Prefix range
The prefix 510-400 includes numbers from 5104000000 to 5104009999.
This range is associated with the FRNK GRNLF rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers