Prefix overview
Phone numbers in prefix 978-312
This page covers the 978-312 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
978-312
RATE CENTER
IPSWICH
CARRIER
COMCAST IP PHONE, LLC
MA
Prefix range
The prefix 978-312 includes numbers from 9783120000 to 9783129999.
This range is associated with the IPSWICH rate center and was originally assigned to COMCAST IP PHONE, LLC.
Numbers in this prefix
20 numbers