BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
38.17.128.0/17
Announced exactly
- 38.17.128.0/17AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.128.0
- Registry
- ARIN · United States · Apr 16, 1991
- Delegated block
- 38.0.0.0 – 38.255.255.255
Covering routes
- 38.0.0.0/8AS174Cogent Communications, LLCRPKI Not found38.0.0.0
More-specific routes
- 38.17.128.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.128.0
- 38.17.132.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.132.0
- 38.17.136.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.136.0
- 38.17.140.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.140.0
- 38.17.144.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.144.0
- 38.17.148.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.148.0
- 38.17.151.0/24AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.151.0
- 38.17.152.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.152.0
- 38.17.153.0/24AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.153.0
- 38.17.156.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.156.0
- 38.17.160.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.160.0
- 38.17.164.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.164.0
- 38.17.168.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.168.0
- 38.17.172.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.172.0
- 38.17.176.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.176.0
- 38.17.180.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.180.0
- 38.17.184.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.184.0
- 38.17.188.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.188.0
- 38.17.192.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.192.0
- 38.17.196.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.196.0
- 38.17.200.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.200.0
- 38.17.204.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.204.0
- 38.17.208.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.208.0
- 38.17.212.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.212.0
- 38.17.216.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.216.0
- 38.17.220.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.220.0
- 38.17.224.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.224.0
- 38.17.228.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.228.0
- 38.17.232.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.232.0
- 38.17.236.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.236.0
- 38.17.240.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.240.0
- 38.17.244.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.244.0
- 38.17.248.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.248.0
- 38.17.252.0/22AS272122TELECOMUNICACIONES G-NETWORK, C.A.RPKI Valid38.17.252.0
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.