BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
211.61.0.0/18
Announced exactly
- 211.61.0.0/18AS9316DACOM-PUBNETPLUSRPKI Not found211.61.0.0
- Registry
- APNIC · South Korea · Feb 16, 2000
- Delegated block
- 211.61.0.0 – 211.61.63.255
Covering routes
No less-specific route covers it.
More-specific routes
- 211.61.4.0/24AS17585Public Procurement Service The Republic of KoreaRPKI Not found211.61.4.0
- 211.61.5.0/24AS17585Public Procurement Service The Republic of KoreaRPKI Not found211.61.5.0
- 211.61.13.0/25AS9320Supreme Court of KoreaRPKI Not found211.61.13.0
- 211.61.16.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.16.0
- 211.61.17.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.17.0
- 211.61.19.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.19.0
- 211.61.20.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.20.0
- 211.61.21.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.21.0
- 211.61.22.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.22.0
- 211.61.23.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.23.0
- 211.61.24.0/24AS23579Seoul Metropolitan Office Of EducationRPKI Not found211.61.24.0
- 211.61.27.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.27.0
- 211.61.28.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.28.0
- 211.61.29.0/24AS17841NATIONAL INFORMATION RESOURCES SERVICERPKI Not found211.61.29.0
- 211.61.30.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.30.0
- 211.61.32.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.32.0
- 211.61.34.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.34.0
- 211.61.38.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.38.0
- 211.61.39.0/24AS55632Sejong City Office of EducationRPKI Not found211.61.39.0
- 211.61.40.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.40.0
- 211.61.41.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.41.0
- 211.61.42.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.42.0
- 211.61.43.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.43.0
- 211.61.48.0/24AS9849Office of the presidentRPKI Not found211.61.48.0
- 211.61.49.0/24AS9849Office of the presidentRPKI Not found211.61.49.0
- 211.61.50.0/24AS9849Office of the presidentRPKI Not found211.61.50.0
- 211.61.51.0/24AS9849Office of the presidentRPKI Not found211.61.51.0
- 211.61.60.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.60.0
- 211.61.61.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.61.0
- 211.61.62.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.62.0
- 211.61.63.0/24AS38120LG HelloVision Corp.RPKI Not found211.61.63.0
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 193.166.0.0/15. 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.