Skip to content
ipaddress.ee

BGP Prefix Lookup

Enter a prefix (or a single address). Answered from our daily copy of the global routing table.

Examples:

51.36.0.0/18

One collector's view (APNIC). A route filtered before it reaches that collector is not listed.

Announced exactly

  • 51.36.0.0/18AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.0.0
Registry
RIPE NCC · Saudi Arabia · Sep 1, 1993
Delegated block
51.36.0.0 – 51.36.255.255

Covering routes

0

No less-specific route covers it.

More-specific routes

48 more-specifics from 1 origin AS(es)
  • 51.36.0.0/19AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.0.0
  • 51.36.0.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.0.0
  • 51.36.0.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.0.0
  • 51.36.1.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.1.0
  • 51.36.10.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.10.0
  • 51.36.12.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.12.0
  • 51.36.14.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.14.0
  • 51.36.16.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.16.0
  • 51.36.18.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.18.0
  • 51.36.2.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.2.0
  • 51.36.20.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.20.0
  • 51.36.20.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.20.0
  • 51.36.21.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.21.0
  • 51.36.22.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.22.0
  • 51.36.22.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.22.0
  • 51.36.24.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.24.0
  • 51.36.26.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.26.0
  • 51.36.28.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.28.0
  • 51.36.30.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.30.0
  • 51.36.30.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.30.0
  • 51.36.31.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.31.0
  • 51.36.32.0/19AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.32.0
  • 51.36.32.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.32.0
  • 51.36.34.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.34.0
  • 51.36.36.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.36.0
  • 51.36.38.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.38.0
  • 51.36.4.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.4.0
  • 51.36.40.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.40.0
  • 51.36.40.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.40.0
  • 51.36.41.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.41.0
  • 51.36.42.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.42.0
  • 51.36.44.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.44.0
  • 51.36.46.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.46.0
  • 51.36.48.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.48.0
  • 51.36.48.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.48.0
  • 51.36.49.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.49.0
  • 51.36.50.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.50.0
  • 51.36.50.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.50.0
  • 51.36.51.0/24AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.51.0
  • 51.36.52.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.52.0
  • 51.36.54.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.54.0
  • 51.36.56.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.56.0
  • 51.36.58.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.58.0
  • 51.36.6.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.6.0
  • 51.36.60.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.60.0
  • 51.36.62.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.62.0
  • 51.36.8.0/22AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.8.0
  • 51.36.8.0/23AS43766Mobile Telecommunication Company Saudi Arabia Joint-Stock companyRPKI Valid51.36.8.0

On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 90.190.0.0/15 (Telia Eesti, AS3249). This tool looks a prefix up in our daily copy of the global routing table and shows three things:

  • Exact announcements: which AS originates exactly this prefix. More than one origin (a MOAS) is normal for anycast services and some multihomed networks, and suspicious otherwise.
  • Covering routes: less-specific announcements that contain it. Traffic follows the most specific route, so a covering route matters if the more-specific one disappears.
  • More-specifics: announcements inside it, which may belong to other networks (customers, or a hijack).

Each announced route is also checked against the RPKI: whether a ROA authorises its origin AS.

The table is the view from APNIC’s route collector. Most of the global table is the same from everywhere, but a route that is filtered before it reaches that collector will not appear.

Frequently asked questions

Why is my /24 not listed but a /16 is?

Your addresses are announced as part of the larger block, and no one announces the /24 separately. That is the normal case for most customers of a provider.

What is a more-specific hijack?

Someone announces a longer prefix inside your space. Because routers prefer the most specific route, traffic goes to them. RPKI with a strict max length makes such announcements invalid.

Can I enter a single address?

Yes. The tool then shows the most specific announced route that contains it.

Related