BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
2001:648::/29
Announced exactly
- 2001:648::/29AS5408National Infrastructures for Research and Technology S.A.RPKI Valid2001:648::
- Registry
- RIPE NCC · Greece · Dec 8, 1999
- Delegated block
- 2001:648:: – 2001:64f:ffff:ffff:ffff:ffff:ffff:ffff
Covering routes
No less-specific route covers it.
More-specific routes
- 2001:648:2000::/48AS3323National Technical University of AthensRPKI Valid2001:648:2000::
- 2001:648:2010::/48AS8643NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENSRPKI Valid2001:648:2010::
- 2001:648:2011::/48AS15690NATIONAL OBSERVATORY OF ATHENSRPKI Valid2001:648:2011::
- 2001:648:2120::/48AS2546National Center of Scientific Research DEMOKRITOSRPKI Valid2001:648:2120::
- 2001:648:22b0::/48AS47616Center for Research and Technology Hellas (CERTH)RPKI Valid2001:648:22b0::
- 2001:648:2300::/47AS8248Computer Technology Institute and Press "Diophantus"RPKI Valid2001:648:2300::
- 2001:648:2302::/48AS8248Computer Technology Institute and Press "Diophantus"RPKI Valid2001:648:2302::
- 2001:648:2330::/48AS9069UNIWARPKI Valid2001:648:2330::
- 2001:648:2420::/48AS31563Hellenic National Meteorological ServiceRPKI Valid2001:648:2420::
- 2001:648:2421::/48AS31563Hellenic National Meteorological ServiceRPKI Valid2001:648:2421::
- 2001:648:24a0::/48AS12402University of PiraeusRPKI Valid2001:648:24a0::
- 2001:648:25e0::/48AS203348EETT-ASRPKI Valid2001:648:25e0::
- 2001:648:2800::/48AS5470Aristotle University of ThessalonikiRPKI Valid2001:648:2800::
- 2001:648:2810::/48AS12364UOMRPKI Valid2001:648:2810::
- 2001:648:2960::/48AS8278TUC-ASRPKI Valid2001:648:2960::
- 2001:648:2c00::/48AS6867UCnetRPKI Valid2001:648:2c00::
- 2001:648:2c10::/48AS8762Hellenic Mediterranean UniversityRPKI Valid2001:648:2c10::
- 2001:648:2c30::/48AS8522Foundation of Research and Technology HellasRPKI Valid2001:648:2c30::
- 2001:648:2e01::/48AS8581University Of IoanninaRPKI Valid2001:648:2e01::
- 2001:648:2e80::/48AS8253DUTHNET-ASRPKI Valid2001:648:2e80::
- 2001:648:3400::/40AS8248Computer Technology Institute and Press "Diophantus"RPKI Valid2001:648:3400::
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 62.103.0.0/16. 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.