BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
194.27.0.0/16
Announced exactly
- 194.27.0.0/16AS8517National Academic Network and Information CenterRPKI Valid194.27.0.0
- Registry
- RIPE NCC · Türkiye · Feb 4, 2000
- Delegated block
- 194.27.0.0 – 194.27.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 194.27.24.0/22AS8678Ankara Universitesi RektorluguRPKI Valid194.27.24.0
- 194.27.28.0/23AS8678Ankara Universitesi RektorluguRPKI Valid194.27.28.0
- 194.27.43.0/24AS8517National Academic Network and Information CenterRPKI Valid194.27.43.0
- 194.27.48.0/23AS42626ATATURK-UNIVERSITESIRPKI Valid194.27.48.0
- 194.27.73.0/24AS31689Eastern Mediterranean UniversityRPKI Valid194.27.73.0
- 194.27.76.0/22AS31689Eastern Mediterranean UniversityRPKI Valid194.27.76.0
- 194.27.76.0/24AS31689Eastern Mediterranean UniversityRPKI Valid194.27.76.0
- 194.27.77.0/24AS31689Eastern Mediterranean UniversityRPKI Valid194.27.77.0
- 194.27.78.0/24AS31689Eastern Mediterranean UniversityRPKI Valid194.27.78.0
- 194.27.79.0/24AS31689Eastern Mediterranean UniversityRPKI Valid194.27.79.0
- 194.27.92.0/22AS211249Yildiz Teknik UniversitesiRPKI Valid194.27.92.0
- 194.27.96.0/22AS211249Yildiz Teknik UniversitesiRPKI Valid194.27.96.0
- 194.27.100.0/23AS211249Yildiz Teknik UniversitesiRPKI Valid194.27.100.0
- 194.27.140.0/24AS8517National Academic Network and Information CenterRPKI Valid194.27.140.0
- 194.27.141.0/24AS8517National Academic Network and Information CenterRPKI Valid194.27.141.0
- 194.27.142.0/24AS8517National Academic Network and Information CenterRPKI Valid194.27.142.0
- 194.27.148.0/24AS34478TUBITAK Ulusal Elektronik ve Kriptoloji Arastirrma EnstitusuRPKI Valid194.27.148.0
- 194.27.149.0/24AS13102Istanbul Bilgi UniversitesiRPKI Valid194.27.149.0
- 194.27.150.0/24AS13102Istanbul Bilgi UniversitesiRPKI Valid194.27.150.0
- 194.27.160.0/21AS24922Hacettepe UniversitesiRPKI Valid194.27.160.0
- 194.27.188.0/22AS24614Sakarya UniversityRPKI Valid194.27.188.0
- 194.27.192.0/22AS15843Galatasaray UniversitesiRPKI Valid194.27.192.0
- 194.27.196.0/22AS24614Sakarya UniversityRPKI Valid194.27.196.0
- 194.27.222.0/24AS205782TUBITAK NATIONAL METROLOGY INSTITUTERPKI Valid194.27.222.0
- 194.27.228.0/22AS8517National Academic Network and Information CenterRPKI Valid194.27.228.0
- 194.27.232.0/22AS8517National Academic Network and Information CenterRPKI Valid194.27.232.0
- 194.27.236.0/23AS8517National Academic Network and Information CenterRPKI Valid194.27.236.0
- 194.27.238.0/23AS24614Sakarya UniversityRPKI Valid194.27.238.0
- 194.27.240.0/20AS24614Sakarya UniversityRPKI Valid194.27.240.0
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 144.122.0.0/16 (Middle East Technical University, AS1967). 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.