BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
71.4.0.0/15
Announced exactly
- 71.4.0.0/15AS2828Verizon BusinessRPKI Not found71.4.0.0
- Registry
- ARIN · United States · Oct 19, 2004
- Delegated block
- 71.4.0.0 – 71.5.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 71.4.22.0/24AS30537Numerica Credit UnionRPKI Not found71.4.22.0
- 71.4.56.0/24AS46458Saving Call LLCRPKI Not found71.4.56.0
- 71.4.62.0/24AS701Verizon BusinessRPKI Valid71.4.62.0
- 71.4.66.0/24AS21631Colorado Housing and Finance AuthorityRPKI Not found71.4.66.0
- 71.4.81.0/24AS32541CCI Networks ServicesRPKI Not found71.4.81.0
- 71.4.91.0/24AS7046Verizon BusinessRPKI Not found71.4.91.0
- 71.4.97.0/24AS701Verizon BusinessRPKI Valid71.4.97.0
- 71.4.106.0/23AS701Verizon BusinessRPKI Not found71.4.106.0
- 71.4.224.0/24AS17166Travelers Property Casualty Corp.RPKI Not found71.4.224.0
- 71.4.246.0/24AS395760MAPCO Express, Inc.RPKI Not found71.4.246.0
- 71.4.247.0/24AS26992CIMplifyRPKI Not found71.4.247.0
- 71.5.3.0/24AS22530Dialink CorporationRPKI Not found71.5.3.0
- 71.5.33.0/24AS26709RacksquaredRPKI Not found71.5.33.0
- 71.5.34.0/24AS8001Cologix, IncRPKI Not found71.5.34.0
- 71.5.40.0/24AS43139Maximum-Net LLCRPKI Not found71.5.40.0
- 71.5.104.0/21AS25694Atomic Data LLCRPKI Not found71.5.104.0
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.