BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
186.38.0.0/18
Announced exactly
- 186.38.0.0/18AS22927Telefonica de ArgentinaRPKI Valid186.38.0.0
- Registry
- LACNIC · Argentina · Jun 2, 2010
- Delegated block
- 186.38.0.0 – 186.38.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 186.38.8.0/24AS52444Pogliotti & Pogliotti Construcciones S.A.RPKI Valid186.38.8.0
- 186.38.9.0/24AS52444Pogliotti & Pogliotti Construcciones S.A.RPKI Valid186.38.9.0
- 186.38.13.0/24AS265720COOP DE PROV. DE ELECT. Y OTROS SERV. PUB. LTDA PUEBLO CAMETRPKI Valid186.38.13.0
- 186.38.30.0/23AS263181Cooperativa Telefonica de Grand BourgRPKI Valid186.38.30.0
- 186.38.32.0/23AS263181Cooperativa Telefonica de Grand BourgRPKI Valid186.38.32.0
- 186.38.42.0/24AS52444Pogliotti & Pogliotti Construcciones S.A.RPKI Valid186.38.42.0
- 186.38.56.0/24AS270022FULLNET SRLRPKI Valid186.38.56.0
- 186.38.60.0/24AS263786COOP. ELECTRICA DE CHACABUCO LTDA.RPKI Valid186.38.60.0
- 186.38.61.0/24AS263786COOP. ELECTRICA DE CHACABUCO LTDA.RPKI Valid186.38.61.0
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 49.224.0.0/14. 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.