Prefix overview
Phone numbers in prefix 660-278
This page covers the 660-278 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
660-278
RATE CENTER
STEFFENVL
CARRIER
MARK TWAIN RURAL TEL. CO.
MO
Prefix range
The prefix 660-278 includes numbers from 6602780000 to 6602789999.
This range is associated with the STEFFENVL rate center and was originally assigned to MARK TWAIN RURAL TEL. CO..
Numbers in this prefix
20 numbers