Netrio SIP Trunking provides wholesale carrier and large business customers with inbound DID for over 12,000 rate centers in all U.S. 50 states, Canada and Puerto Rico.

  • Local DID coverage in over 95% of U.S.
  • Call Name Registration & Display
  • E911 emergency services
  • Virtual DID’s
  • Redundant DID Carrier Routes
  • Local Number Portability LNP
  • International DID’s
  • T.38 Fax Support
  • SMS Text


  • Virtual DID’s for remote presence anywhere
  • Unlimited Call Paths – never block incoming calls
  • Call Center DID blocks for market identification and tracking
  • Managed QoS – Private Peering & Public Peering


  • Dallas based NOC with continuous surveillance & support 365 x 7 x 24
  • Redundant class 4 carrier switch interconnected via SS7 & SIP
  • Direct TDM & SS7 connectivity with AT&T / Verizon

NETRIO is a premier VoIP Service Provider. Specializing in delivering quality Voice over IP services to Business, Call Centers & Carriers using SIP Trunking and traditional PRI / SS7 circuits.