Local Calling Guide

Switch search

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

Switch: SLSPMDNB

Switch (link to prefixes) Switch name Company
SLSPMDNBDS0 SILVER SPRING NORBECK  9212 VERIZON MARYLAND, INC. 

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.