BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
Examples:
61.72.0.0/13
One collector's view (APNIC). A route filtered before it reaches that collector is not listed.
Announced exactly
- 61.72.0.0/13AS4766Korea TelecomRPKI Not found61.72.0.0
- Registry
- APNIC · South Korea · Dec 12, 2000
- Delegated block
- 61.72.0.0 – 61.75.255.255
Covering routes
0
No less-specific route covers it.
More-specific routes
56 more-specifics from 21 origin AS(es)
- 61.72.46.0/24AS152221YonhapnewsTVRPKI Not found61.72.46.0
- 61.72.126.0/23AS18031Sangmyung UniversityRPKI Not found61.72.126.0
- 61.72.128.0/23AS18031Sangmyung UniversityRPKI Not found61.72.128.0
- 61.72.178.0/25AS4766Korea TelecomRPKI Not found61.72.178.0
- 61.72.178.128/25AS4766Korea TelecomRPKI Not found61.72.178.128
- 61.72.179.0/24AS4766Korea TelecomRPKI Not found61.72.179.0
- 61.72.180.0/22AS4766Korea TelecomRPKI Not found61.72.180.0
- 61.72.224.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.224.0
- 61.72.225.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.225.0
- 61.72.226.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.226.0
- 61.72.230.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.230.0
- 61.72.237.128/25AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.237.128
- 61.72.238.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.238.0
- 61.72.239.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found61.72.239.0
- 61.73.57.0/24AS18031Sangmyung UniversityRPKI Not found61.73.57.0
- 61.73.60.128/25AS17847Financial Supervisory ServiceRPKI Not found61.73.60.128
- 61.73.100.0/25AS10061Financial Supervisory ServiceRPKI Not found61.73.100.0
- 61.73.184.0/24AS55615DOUZONEBIZONRPKI Not found61.73.184.0
- 61.73.185.0/24AS55615DOUZONEBIZONRPKI Not found61.73.185.0
- 61.73.212.0/24AS55615DOUZONEBIZONRPKI Not found61.73.212.0
- 61.74.92.0/24AS9318SK Broadband Co LtdRPKI Not found61.74.92.0
- 61.74.93.0/24AS9318SK Broadband Co LtdRPKI Not found61.74.93.0
- 61.74.94.0/24AS9318SK Broadband Co LtdRPKI Not found61.74.94.0
- 61.74.191.0/24AS38427FORCETEC Co., LTD.RPKI Not found61.74.191.0
- 61.75.198.0/24AS9631youngsan universityRPKI Not found61.75.198.0
- 61.75.199.0/24AS9631youngsan universityRPKI Not found61.75.199.0
- 61.75.200.0/24AS9631youngsan universityRPKI Not found61.75.200.0
- 61.75.201.0/24AS9631youngsan universityRPKI Not found61.75.201.0
- 61.75.253.0/24AS38427FORCETEC Co., LTD.RPKI Not found61.75.253.0
- 61.75.254.0/24AS38427FORCETEC Co., LTD.RPKI Not found61.75.254.0
- 61.76.89.0/24AS152283Korea Elevator Safety AgencyRPKI Not found61.76.89.0
- 61.76.89.0/25AS152283Korea Elevator Safety AgencyRPKI Not found61.76.89.0
- 61.76.89.128/25AS152283Korea Elevator Safety AgencyRPKI Not found61.76.89.128
- 61.76.236.0/24AS9631youngsan universityRPKI Not found61.76.236.0
- 61.76.237.0/24AS9631youngsan universityRPKI Not found61.76.237.0
- 61.76.238.0/24AS9631youngsan universityRPKI Not found61.76.238.0
- 61.76.239.0/24AS9631youngsan universityRPKI Not found61.76.239.0
- 61.77.19.0/24AS38408GYEONGGI PROVINCIAL ANYANG OFFICE OF EDUCATIONRPKI Not found61.77.19.0
- 61.77.29.0/24AS38403GunpoUiwang Office of EducationRPKI Not found61.77.29.0
- 61.77.45.0/24AS38406Kyeonggi-Do Hwaseong Office of EducationRPKI Not found61.77.45.0
- 61.77.120.0/24AS38411Yongin office of educationRPKI Not found61.77.120.0
- 61.77.180.0/23AS4766Korea TelecomRPKI Not found61.77.180.0
- 61.78.0.0/24AS55615DOUZONEBIZONRPKI Not found61.78.0.0
- 61.78.12.0/24AS55615DOUZONEBIZONRPKI Not found61.78.12.0
- 61.78.51.0/24AS55593netmarbleRPKI Not found61.78.51.0
- 61.78.74.0/24AS10185Hana Bank Co.RPKI Not found61.78.74.0
- 61.78.113.0/24AS4766Korea TelecomRPKI Not found61.78.113.0
- 61.78.114.0/24AS4766Korea TelecomRPKI Not found61.78.114.0
- 61.78.115.0/24AS4766Korea TelecomRPKI Not found61.78.115.0
- 61.78.157.0/24AS9784kbcardRPKI Not found61.78.157.0
- 61.79.37.0/24AS152283Korea Elevator Safety AgencyRPKI Not found61.79.37.0
- 61.79.88.0/24AS38403GunpoUiwang Office of EducationRPKI Not found61.79.88.0
- 61.79.244.0/24AS38110Chungwoon UniversityRPKI Not found61.79.244.0
- 61.79.245.0/24AS38110Chungwoon UniversityRPKI Not found61.79.245.0
- 61.79.246.0/24AS38391Gyeonggi provincial gimpo office of educationRPKI Not found61.79.246.0
- 61.79.247.0/24AS38404Gyeonggi Provincial Bucheon Office of EducationRPKI Not found61.79.247.0
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.