BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
182.52.64.0/19
Announced exactly
- 182.52.64.0/19AS23969TOT Public Company LimitedRPKI Valid182.52.64.0
- Registry
- APNIC · Thailand · Feb 25, 2010
- Delegated block
- 182.52.0.0 – 182.53.255.255
Covering routes
- 182.52.64.0/18AS23969TOT Public Company LimitedRPKI Valid182.52.64.0
- 182.52.0.0/17AS23969TOT Public Company LimitedRPKI Valid182.52.0.0
- 182.52.0.0/15AS23969TOT Public Company LimitedRPKI Valid182.52.0.0
More-specific routes
- 182.52.65.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.65.0
- 182.52.66.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.66.0
- 182.52.68.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.68.0
- 182.52.70.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.70.0
- 182.52.71.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.71.0
- 182.52.72.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.72.0
- 182.52.73.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.73.0
- 182.52.76.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.76.0
- 182.52.77.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.77.0
- 182.52.78.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.78.0
- 182.52.83.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.83.0
- 182.52.84.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.84.0
- 182.52.85.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.85.0
- 182.52.86.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.86.0
- 182.52.87.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.87.0
- 182.52.88.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.88.0
- 182.52.89.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.89.0
- 182.52.90.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.90.0
- 182.52.91.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.91.0
- 182.52.93.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.93.0
- 182.52.94.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.94.0
- 182.52.95.0/24AS23969TOT Public Company LimitedRPKI Valid182.52.95.0
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.