Using public route servers and looking glass(es) to validate BGP prefix announcements

Public route servers and BGP looking glass(es) are used to validate BGP announcements. These tools are helpful to validate BGP changes are working as expected across the public Internet.

$ telnet

route-server> show bgp ipv4
BGP routing table entry for
Paths: (23 available, best #11, table Default-IP-Routing-Table)
  Not advertised to any peer
  20115 2552 2552 2552 from (
      Origin IGP, metric 0, localpref 140, valid, internal
      Originator:, Cluster list:
      Last update: Wed Apr 29 15:57:23 2020

Web based looking glass from Internet2:

Web Looking Glass