BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
200.15.0.0/16
Announced exactly
- 200.15.0.0/16AS2914NTT America, Inc.RPKI Valid200.15.0.0
- Registry
- ARIN · United States · May 4, 1994
- Delegated block
- 200.15.0.0 – 200.15.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 200.15.12.0/23AS273452TRANSATEL Brasil LtdaRPKI Valid200.15.12.0
- 200.15.12.0/24AS273452TRANSATEL Brasil LtdaRPKI Valid200.15.12.0
- 200.15.13.0/24AS273452TRANSATEL Brasil LtdaRPKI Valid200.15.13.0
- 200.15.14.0/23AS270543Gwg telco telecomunicacoes eireliRPKI Valid200.15.14.0
- 200.15.16.0/22AS266044Nicnet S.A.RPKI Valid200.15.16.0
- 200.15.20.0/22AS266044Nicnet S.A.RPKI Valid200.15.20.0
- 200.15.3.0/24AS6220inContact Inc.RPKI Valid200.15.3.0
- 200.15.32.0/20AS273490FIBRION INTERNET LTDARPKI Valid200.15.32.0
- 200.15.48.0/24AS268624Gamers Club LtdaRPKI Valid200.15.48.0
- 200.15.49.0/24AS268624Gamers Club LtdaRPKI Valid200.15.49.0
- 200.15.5.0/24AS270543Gwg telco telecomunicacoes eireliRPKI Valid200.15.5.0
- 200.15.50.0/24AS268624Gamers Club LtdaRPKI Valid200.15.50.0
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.