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 router-server.he.net

route-server> show bgp ipv4 128.252.0.0/16
BGP routing table entry for 128.252.0.0/16
Paths: (23 available, best #11, table Default-IP-Routing-Table)
  Not advertised to any peer
  20115 2552 2552 2552
    216.66.24.70 from 216.218.252.82 (216.218.252.169)
      Origin IGP, metric 0, localpref 140, valid, internal
      Originator: 216.218.252.169, Cluster list: 216.218.252.82 216.218.252.184
      Last update: Wed Apr 29 15:57:23 2020

Web based looking glass from Internet2: