Local Calling Guide

Switch search

Search by CLLI code
  • Enter full or partial CLLI code to see all matching switches.

Switch: PSTNMDPS

Switch (link to prefixes) Switch name Company
PSTNMDPSRS0 PRESTON  9212 VERIZON MARYLAND, INC. 

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.