BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
211.104.0.0/14
Announced exactly
- 211.104.0.0/14AS4766Korea TelecomRPKI Not found211.104.0.0
- Registry
- APNIC · South Korea · Apr 14, 2000
- Delegated block
- 211.104.0.0 – 211.107.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 211.104.10.0/25AS131867Sinokor Merchant Marine Co., Ltd.RPKI Not found211.104.10.0
- 211.104.44.0/24AS4766Korea TelecomRPKI Not found211.104.44.0
- 211.104.45.0/24AS4766Korea TelecomRPKI Not found211.104.45.0
- 211.104.46.0/24AS4766Korea TelecomRPKI Not found211.104.46.0
- 211.104.47.0/24AS4766Korea TelecomRPKI Not found211.104.47.0
- 211.104.86.0/24AS4766Korea TelecomRPKI Not found211.104.86.0
- 211.104.111.0/24AS10156Seoul National University of EducationRPKI Not found211.104.111.0
- 211.104.115.0/24AS9696Oscar EnterpriseRPKI Not found211.104.115.0
- 211.104.138.0/24AS9696Oscar EnterpriseRPKI Not found211.104.138.0
- 211.104.167.0/24AS9318SK Broadband Co LtdRPKI Not found211.104.167.0
- 211.105.7.0/24AS4766Korea TelecomRPKI Not found211.105.7.0
- 211.105.8.0/24AS4766Korea TelecomRPKI Not found211.105.8.0
- 211.105.73.0/24AS45969INICIS Co., LtdRPKI Not found211.105.73.0
- 211.105.252.0/22AS4766Korea TelecomRPKI Not found211.105.252.0
- 211.106.22.0/24AS9684HANWHA Corp. Information Service div.RPKI Not found211.106.22.0
- 211.106.65.128/25AS38688GSNeotekRPKI Not found211.106.65.128
- 211.106.109.0/24AS9696Oscar EnterpriseRPKI Not found211.106.109.0
- 211.106.131.0/24AS9696Oscar EnterpriseRPKI Not found211.106.131.0
- 211.106.183.0/24AS4766Korea TelecomRPKI Not found211.106.183.0
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.