BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
199.0.0.0/14
Announced exactly
- 199.0.0.0/14AS174Cogent Communications, LLCRPKI Not found199.0.0.0
- Registry
- ARIN · United States · Sep 8, 1993
- Delegated block
- 199.0.0.0 – 199.3.255.255
Covering routes
No less-specific route covers it.
More-specific routes
- 199.0.0.0/19AS4637ASN-TELSTRA-GLOBAL Telstra GlobalRPKI Not found199.0.0.0
- 199.0.32.0/19AS4637ASN-TELSTRA-GLOBAL Telstra GlobalRPKI Not found199.0.32.0
- 199.0.184.0/24AS22885ADVERTISING SPECIALTY INSTITUTE, INC.RPKI Not found199.0.184.0
- 199.0.185.0/24AS8075Microsoft CorporationRPKI Not found199.0.185.0
- 199.0.192.0/20AS14174North Central Kansas Community Network Co.RPKI Not found199.0.192.0
- 199.0.192.0/21AS14174North Central Kansas Community Network Co.RPKI Not found199.0.192.0
- 199.1.16.0/24AS23508Chesapeake General HospitalRPKI Not found199.1.16.0
- 199.1.24.0/21AS174Cogent Communications, LLCRPKI Not found199.1.24.0
- 199.1.128.0/21AS26133Frankfort Plant BoardRPKI Not found199.1.128.0
- 199.1.136.0/21AS26133Frankfort Plant BoardRPKI Not found199.1.136.0
- 199.1.146.0/24AS11030Qualcomm, Inc.RPKI Not found199.1.146.0
- 199.1.147.0/24AS33198Qualcomm, Inc.RPKI Not found199.1.147.0
- 199.1.192.0/22AS32614High Desert Internet ServicesRPKI Not found199.1.192.0
- 199.2.102.0/24AS174Cogent Communications, LLCRPKI Not found199.2.102.0
- 199.2.135.0/24AS11924Montana Opticom, LLCRPKI Not found199.2.135.0
- 199.2.247.0/24AS11539Open Text CorporationRPKI Not found199.2.247.0
- 199.2.248.0/24AS11676Conduent Business Services, LLCRPKI Not found199.2.248.0
- 199.3.12.0/24AS2828Verizon BusinessRPKI Not found199.3.12.0
- 199.3.18.0/24AS395834Trondent Developement CorpRPKI Not found199.3.18.0
- 199.3.108.0/24AS15157NORTHWESTERN CORPORATIONRPKI Not found199.3.108.0
- 199.3.109.0/24AS15157NORTHWESTERN CORPORATIONRPKI Not found199.3.109.0
- 199.3.194.0/24AS174Cogent Communications, LLCRPKI Not found199.3.194.0
- 199.3.212.0/24AS14174North Central Kansas Community Network Co.RPKI Not found199.3.212.0
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 193.166.0.0/15. 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.