BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
2001:4450::/29
Announced exactly
- 2001:4450::/29AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4450::
- Registry
- APNIC · Philippines · Jul 15, 2005
- Delegated block
- 2001:4450:: – 2001:4450:ffff:ffff:ffff:ffff:ffff:ffff
Covering routes
No less-specific route covers it.
More-specific routes
- 2001:4450::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4450::
- 2001:4450:40::/48AS20940Akamai International B.V.RPKI Valid2001:4450:40::
- 2001:4451::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4451::
- 2001:4452::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4452::
- 2001:4453::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4453::
- 2001:4454::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4454::
- 2001:4455::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4455::
- 2001:4455:9299::/48AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4455:9299::
- 2001:4456::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4456::
- 2001:4457::/32AS9299Philippine Long Distance Telephone CompanyRPKI Valid2001:4457::
- 2001:4457:ff0::/48AS20940Akamai International B.V.RPKI Valid2001:4457:ff0::
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.