BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
Examples:
113.196.64.0/18
One collector's view (APNIC). A route filtered before it reaches that collector is not listed.
Announced exactly
- 113.196.64.0/18AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.64.0
- Registry
- APNIC · Taiwan · Nov 20, 2008
- Delegated block
- 113.196.0.0 – 113.196.255.255
Covering routes
2
- 113.196.0.0/17AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.0.0
- 113.196.0.0/16AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.0.0
More-specific routes
46 more-specifics from 3 origin AS(es)
- 113.196.64.0/19AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.64.0
- 113.196.65.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.65.0
- 113.196.66.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.66.0
- 113.196.70.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.70.0
- 113.196.71.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.71.0
- 113.196.72.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.72.0
- 113.196.73.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.73.0
- 113.196.74.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.74.0
- 113.196.75.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.75.0
- 113.196.76.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.76.0
- 113.196.77.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.77.0
- 113.196.78.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.78.0
- 113.196.79.0/24AS198949Radware LtdRPKI Valid113.196.79.0
- 113.196.80.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.80.0
- 113.196.81.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.81.0
- 113.196.82.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.82.0
- 113.196.83.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.83.0
- 113.196.84.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.84.0
- 113.196.85.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.85.0
- 113.196.86.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.86.0
- 113.196.87.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.87.0
- 113.196.88.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.88.0
- 113.196.90.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.90.0
- 113.196.91.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.91.0
- 113.196.92.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.92.0
- 113.196.93.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.93.0
- 113.196.94.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.94.0
- 113.196.95.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.95.0
- 113.196.96.0/19AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.96.0
- 113.196.99.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.99.0
- 113.196.101.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.101.0
- 113.196.109.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.109.0
- 113.196.110.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.110.0
- 113.196.111.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.111.0
- 113.196.114.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.114.0
- 113.196.115.0/24AS4780Digital United Inc.RPKI Valid113.196.115.0
- 113.196.116.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.116.0
- 113.196.117.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.117.0
- 113.196.118.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.118.0
- 113.196.119.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.119.0
- 113.196.120.0/22AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.120.0
- 113.196.120.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.120.0
- 113.196.124.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.124.0
- 113.196.125.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.125.0
- 113.196.126.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.126.0
- 113.196.127.0/24AS9919New Century InfoComm Tech Co., Ltd.RPKI Valid113.196.127.0
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 2.48.0.0/14. 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.