BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
66.78.0.0/18
Announced exactly
- 66.78.0.0/18AS21769Colocation America CorporationRPKI Not found66.78.0.0
- Registry
- ARIN · United States · Apr 26, 2016
- Delegated block
- 66.78.0.0 – 66.78.63.255
Covering routes
No less-specific route covers it.
More-specific routes
- 66.78.8.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.8.0
- 66.78.9.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.9.0
- 66.78.10.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.10.0
- 66.78.12.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.12.0
- 66.78.13.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.13.0
- 66.78.14.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.14.0
- 66.78.15.0/24AS54103MOD Mission Critical, LLCRPKI Not found66.78.15.0
- 66.78.16.0/23AS9009M247 Europe SRLRPKI Valid66.78.16.0
- 66.78.18.0/24AS47007Colocation America CorporationRPKI Valid66.78.18.0
- 66.78.19.0/24AS47007Colocation America CorporationRPKI Valid66.78.19.0
- 66.78.20.0/24AS47007Colocation America CorporationRPKI Valid66.78.20.0
- 66.78.21.0/24AS47007Colocation America CorporationRPKI Valid66.78.21.0
- 66.78.22.0/24AS47007Colocation America CorporationRPKI Valid66.78.22.0
- 66.78.23.0/24AS47007Colocation America CorporationRPKI Valid66.78.23.0
- 66.78.24.0/24AS47007Colocation America CorporationRPKI Valid66.78.24.0
- 66.78.25.0/24AS47007Colocation America CorporationRPKI Valid66.78.25.0
- 66.78.36.0/24AS21859Zenlayer IncRPKI Valid66.78.36.0
- 66.78.37.0/24AS21859Zenlayer IncRPKI Valid66.78.37.0
- 66.78.38.0/24AS20473The Constant Company, LLCRPKI Valid66.78.38.0
- 66.78.39.0/24AS214054Nitrode Corporation trading as ChartVPS TechnologiesRPKI Valid66.78.39.0
- 66.78.40.0/24AS215659Aokigahara SRLRPKI Valid66.78.40.0
- 66.78.41.0/24AS401605Web Host Most, LLCRPKI Valid66.78.41.0
- 66.78.43.0/24AS47007Colocation America CorporationRPKI Valid66.78.43.0
- 66.78.44.0/24AS40676Psychz NetworksRPKI Valid66.78.44.0
- 66.78.45.0/24AS16509Amazon.com, Inc.RPKI Valid66.78.45.0
- 66.78.46.0/24AS194463Z CanadaRPKI Valid66.78.46.0
- 66.78.47.0/24AS47007Colocation America CorporationRPKI Valid66.78.47.0
- 66.78.50.0/23AS174Cogent Communications, LLCRPKI Valid66.78.50.0
- 66.78.54.0/23AS174Cogent Communications, LLCRPKI Valid66.78.54.0
- 66.78.58.0/24AS47007Colocation America CorporationRPKI Valid66.78.58.0
- 66.78.59.0/24AS59253LEASEWEB SINGAPORE PTE. LTD.RPKI Valid66.78.59.0
- 66.78.60.0/24AS47007Colocation America CorporationRPKI Valid66.78.60.0
- 66.78.61.0/24AS47007Colocation America CorporationRPKI Valid66.78.61.0
- 66.78.62.0/24AS47007Colocation America CorporationRPKI Valid66.78.62.0
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.