BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
Examples:
123.150.0.0/15
One collector's view (APNIC). A route filtered before it reaches that collector is not listed.
Announced exactly
- 123.150.0.0/15AS17638ASN for TIANJIN Provincial Net of CTRPKI Not found123.150.0.0
- Registry
- APNIC · China · Feb 28, 2007
- Delegated block
- 123.150.0.0 – 123.151.255.255
Covering routes
0
No less-specific route covers it.
More-specific routes
87 more-specifics from 4 origin AS(es)
- 123.150.0.0/16AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.0.0
- 123.150.4.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.4.0
- 123.150.6.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.6.0
- 123.150.7.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.7.0
- 123.150.11.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.11.0
- 123.150.12.0/22AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.12.0
- 123.150.14.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.14.0
- 123.150.16.0/20AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.16.0
- 123.150.34.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.34.0
- 123.150.37.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.37.0
- 123.150.43.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.43.0
- 123.150.46.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.46.0
- 123.150.57.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.57.0
- 123.150.65.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.65.0
- 123.150.70.0/23AS58542Tianjij,300000RPKI Valid123.150.70.0
- 123.150.72.0/23AS58542Tianjij,300000RPKI Valid123.150.72.0
- 123.150.76.0/22AS58542Tianjij,300000RPKI Valid123.150.76.0
- 123.150.81.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.81.0
- 123.150.92.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.92.0
- 123.150.95.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.95.0
- 123.150.96.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.96.0
- 123.150.103.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.103.0
- 123.150.109.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.109.0
- 123.150.141.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.141.0
- 123.150.143.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.143.0
- 123.150.145.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.145.0
- 123.150.147.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.147.0
- 123.150.174.0/24AS58542Tianjij,300000RPKI Valid123.150.174.0
- 123.150.208.0/24AS58542Tianjij,300000RPKI Valid123.150.208.0
- 123.150.220.0/23AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.220.0
- 123.150.222.0/23AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.222.0
- 123.150.228.0/23AS132536China TelecomRPKI Valid123.150.228.0
- 123.150.242.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.242.0
- 123.150.253.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.253.0
- 123.150.254.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.254.0
- 123.150.255.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.150.255.0
- 123.151.0.0/16AS17638ASN for TIANJIN Provincial Net of CTRPKI Not found123.151.0.0
- 123.151.0.0/17AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.0.0
- 123.151.0.0/21AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.0.0
- 123.151.8.0/24AS58542Tianjij,300000RPKI Valid123.151.8.0
- 123.151.9.0/24AS58542Tianjij,300000RPKI Valid123.151.9.0
- 123.151.10.0/23AS58542Tianjij,300000RPKI Valid123.151.10.0
- 123.151.12.0/22AS58542Tianjij,300000RPKI Valid123.151.12.0
- 123.151.17.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.17.0
- 123.151.20.0/24AS132536China TelecomRPKI Valid123.151.20.0
- 123.151.21.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.21.0
- 123.151.24.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.24.0
- 123.151.26.0/23AS58542Tianjij,300000RPKI Valid123.151.26.0
- 123.151.39.0/24AS58542Tianjij,300000RPKI Valid123.151.39.0
- 123.151.40.0/24AS58542Tianjij,300000RPKI Valid123.151.40.0
- 123.151.42.0/24AS58542Tianjij,300000RPKI Valid123.151.42.0
- 123.151.46.0/24AS58542Tianjij,300000RPKI Valid123.151.46.0
- 123.151.47.0/24AS58542Tianjij,300000RPKI Valid123.151.47.0
- 123.151.48.0/20AS58542Tianjij,300000RPKI Valid123.151.48.0
- 123.151.64.0/21AS58542Tianjij,300000RPKI Valid123.151.64.0
- 123.151.72.0/22AS58542Tianjij,300000RPKI Valid123.151.72.0
- 123.151.76.0/22AS58542Tianjij,300000RPKI Valid123.151.76.0
- 123.151.89.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.89.0
- 123.151.92.0/22AS58542Tianjij,300000RPKI Valid123.151.92.0
- 123.151.96.0/20AS58542Tianjij,300000RPKI Valid123.151.96.0
- 123.151.112.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.112.0
- 123.151.113.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.113.0
- 123.151.124.0/24AS132536China TelecomRPKI Valid123.151.124.0
- 123.151.126.0/23AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.126.0
- 123.151.128.0/21AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.128.0
- 123.151.130.0/23AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.130.0
- 123.151.137.0/24AS58542Tianjij,300000RPKI Valid123.151.137.0
- 123.151.138.0/24AS58542Tianjij,300000RPKI Valid123.151.138.0
- 123.151.139.0/24AS58542Tianjij,300000RPKI Valid123.151.139.0
- 123.151.144.0/24AS58542Tianjij,300000RPKI Valid123.151.144.0
- 123.151.146.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.146.0
- 123.151.147.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.147.0
- 123.151.148.0/22AS58542Tianjij,300000RPKI Valid123.151.148.0
- 123.151.152.0/22AS58542Tianjij,300000RPKI Valid123.151.152.0
- 123.151.156.0/23AS58542Tianjij,300000RPKI Valid123.151.156.0
- 123.151.158.0/24AS58542Tianjij,300000RPKI Valid123.151.158.0
- 123.151.162.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.162.0
- 123.151.163.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.163.0
- 123.151.165.0/24AS132536China TelecomRPKI Valid123.151.165.0
- 123.151.173.0/24AS17638ASN for TIANJIN Provincial Net of CTRPKI Valid123.151.173.0
- 123.151.176.0/22AS58542Tianjij,300000RPKI Valid123.151.176.0
- 123.151.180.0/24AS58542Tianjij,300000RPKI Valid123.151.180.0
- 123.151.181.0/24AS58542Tianjij,300000RPKI Valid123.151.181.0
- 123.151.182.0/24AS58542Tianjij,300000RPKI Valid123.151.182.0
- 123.151.183.0/24AS58542Tianjij,300000RPKI Valid123.151.183.0
- 123.151.190.0/24AS58542Tianjij,300000RPKI Valid123.151.190.0
- 123.151.192.0/18AS4809China Telecom Next Generation Carrier NetworkRPKI Valid123.151.192.0
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.