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BGP Prefix Lookup

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

Examples:

180.211.128.0/17

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

Announced exactly

Registry
APNIC · Bangladesh · Oct 1, 2009
Delegated block
180.211.128.0 – 180.211.255.255

Covering routes

0

No less-specific route covers it.

More-specific routes

58 more-specifics from 4 origin AS(es)
  • 180.211.128.0/19AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.128.0
  • 180.211.129.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.129.0
  • 180.211.134.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.134.0
  • 180.211.135.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.135.0
  • 180.211.137.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.137.0
  • 180.211.141.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.141.0
  • 180.211.142.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.142.0
  • 180.211.143.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.143.0
  • 180.211.144.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.144.0
  • 180.211.145.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.145.0
  • 180.211.146.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.146.0
  • 180.211.147.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.147.0
  • 180.211.152.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.152.0
  • 180.211.153.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.153.0
  • 180.211.154.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.154.0
  • 180.211.156.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.156.0
  • 180.211.159.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.159.0
  • 180.211.160.0/19AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.160.0
  • 180.211.161.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.161.0
  • 180.211.162.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.162.0
  • 180.211.173.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.173.0
  • 180.211.181.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.181.0
  • 180.211.186.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.186.0
  • 180.211.187.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.187.0
  • 180.211.191.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.191.0
  • 180.211.192.0/21AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.192.0
  • 180.211.192.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.192.0
  • 180.211.193.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.193.0
  • 180.211.195.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.195.0
  • 180.211.196.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.196.0
  • 180.211.197.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.197.0
  • 180.211.199.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.199.0
  • 180.211.201.0/24AS17494Telecom Operator & Internet Service Provider as wellRPKI Valid180.211.201.0
  • 180.211.202.0/24AS17494Telecom Operator & Internet Service Provider as wellRPKI Valid180.211.202.0
  • 180.211.205.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.205.0
  • 180.211.207.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.207.0
  • 180.211.208.0/24AS139616The Central Bank of BangladeshRPKI Invalid180.211.208.0
  • 180.211.210.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.210.0
  • 180.211.211.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.211.0
  • 180.211.213.0/24AS63932Bangladesh Computer CouncilRPKI Valid180.211.213.0
  • 180.211.214.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.214.0
  • 180.211.215.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.215.0
  • 180.211.219.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.219.0
  • 180.211.227.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.227.0
  • 180.211.228.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.228.0
  • 180.211.232.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.232.0
  • 180.211.233.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.233.0
  • 180.211.237.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.237.0
  • 180.211.238.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.238.0
  • 180.211.239.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.239.0
  • 180.211.243.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.243.0
  • 180.211.247.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.247.0
  • 180.211.248.0/21AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.248.0
  • 180.211.248.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.248.0
  • 180.211.249.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.249.0
  • 180.211.250.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.250.0
  • 180.211.254.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.254.0
  • 180.211.255.0/24AS45588Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.RPKI Valid180.211.255.0

On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 85.240.0.0/13. 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.

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