BGP Prefix Lookup
Enter a prefix (or a single address). Answered from our daily copy of the global routing table.
Examples:
36.111.0.0/16
One collector's view (APNIC). A route filtered before it reaches that collector is not listed.
Announced exactly
- 36.111.0.0/16AS4134CHINANET-BACKBONE No.31,Jin-rong StreetRPKI Not found36.111.0.0
- Registry
- APNIC · China · Jan 17, 2011
- Delegated block
- 36.96.0.0 – 36.127.255.255
Covering routes
0
No less-specific route covers it.
More-specific routes
69 more-specifics from 13 origin AS(es)
- 36.111.0.0/20AS4812CHINANET-SH-AP China Telecom GroupRPKI Valid36.111.0.0
- 36.111.16.0/20AS4811CHINANET-SHANGHAI-MAN China Telecom GroupRPKI Valid36.111.16.0
- 36.111.32.0/22AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Valid36.111.32.0
- 36.111.32.0/23AS58466CT-GUANGZHOU-IDC CHINANET Guangdong province networkRPKI Valid36.111.32.0
- 36.111.34.0/23AS58466CT-GUANGZHOU-IDC CHINANET Guangdong province networkRPKI Valid36.111.34.0
- 36.111.40.0/21AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Valid36.111.40.0
- 36.111.40.0/24AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Valid36.111.40.0
- 36.111.42.0/24AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Valid36.111.42.0
- 36.111.43.0/24AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Valid36.111.43.0
- 36.111.64.0/24AS38283CHINANET-SCIDC-AS-AP CHINANET SiChuan Telecom Internet Data CenterRPKI Valid36.111.64.0
- 36.111.65.0/24AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.65.0
- 36.111.66.0/24AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.66.0
- 36.111.67.0/24AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.67.0
- 36.111.68.0/23AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.68.0
- 36.111.70.0/23AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.70.0
- 36.111.72.0/21AS4134CHINANET-BACKBONE No.31,Jin-rong StreetRPKI Valid36.111.72.0
- 36.111.72.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.72.0
- 36.111.73.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.73.0
- 36.111.74.0/23AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.74.0
- 36.111.76.0/24AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.76.0
- 36.111.77.0/24AS139220CHINANET-SICHUAN-CHUANXI-IDC Sichuan Chuanxn IDCRPKI Valid36.111.77.0
- 36.111.80.0/23AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.80.0
- 36.111.80.0/24AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.80.0
- 36.111.81.0/24AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.81.0
- 36.111.82.0/23AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.82.0
- 36.111.82.0/24AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.82.0
- 36.111.83.0/24AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.83.0
- 36.111.88.0/24AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.88.0
- 36.111.128.0/20AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.128.0
- 36.111.144.0/20AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Not found36.111.144.0
- 36.111.144.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.144.0
- 36.111.145.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.145.0
- 36.111.146.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.146.0
- 36.111.147.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.147.0
- 36.111.148.0/23AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.148.0
- 36.111.148.0/24AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.148.0
- 36.111.149.0/24AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.149.0
- 36.111.150.0/23AS23724CHINANET-IDC-BJ-AP IDC, China Telecommunications CorporationRPKI Valid36.111.150.0
- 36.111.150.0/24AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.150.0
- 36.111.151.0/24AS141679CHINATELECOM-IDC-BTHBD-AP China Telecom Beijing Tianjin Hebei Big Data Industry Park BranchRPKI Valid36.111.151.0
- 36.111.152.0/22AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.152.0
- 36.111.156.0/24AS134768CHINANET-SHAANXI-CLOUD-BASE CHINANET SHAANXI province Cloud Base networkRPKI Valid36.111.156.0
- 36.111.157.0/24AS134768CHINANET-SHAANXI-CLOUD-BASE CHINANET SHAANXI province Cloud Base networkRPKI Valid36.111.157.0
- 36.111.158.0/24AS134768CHINANET-SHAANXI-CLOUD-BASE CHINANET SHAANXI province Cloud Base networkRPKI Valid36.111.158.0
- 36.111.159.0/24AS134768CHINANET-SHAANXI-CLOUD-BASE CHINANET SHAANXI province Cloud Base networkRPKI Valid36.111.159.0
- 36.111.160.0/20AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.160.0
- 36.111.166.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.166.0
- 36.111.170.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.170.0
- 36.111.172.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.172.0
- 36.111.173.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.173.0
- 36.111.174.0/23AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.174.0
- 36.111.176.0/20AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.176.0
- 36.111.177.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.177.0
- 36.111.184.0/23AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.184.0
- 36.111.191.0/24AS58519CHINATELECOM-CTCLOUD Cloud Computing CorporationRPKI Valid36.111.191.0
- 36.111.192.0/22AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.192.0
- 36.111.196.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.196.0
- 36.111.197.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.197.0
- 36.111.198.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.198.0
- 36.111.199.0/24AS134756CHINANET-NANJING-JISHAN-IDC CHINANET Nanjing Jishan IDC networkRPKI Valid36.111.199.0
- 36.111.200.0/22AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.200.0
- 36.111.200.0/23AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.200.0
- 36.111.202.0/23AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.202.0
- 36.111.204.0/22AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.204.0
- 36.111.204.0/23AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.204.0
- 36.111.207.0/24AS63835CT-HUNAN-CHANGSHA-IDC No.293,Wanbao AvenueRPKI Valid36.111.207.0
- 36.111.208.0/23AS58466CT-GUANGZHOU-IDC CHINANET Guangdong province networkRPKI Not found36.111.208.0
- 36.111.208.0/24AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Not found36.111.208.0
- 36.111.209.0/24AS135089CHINANET-GUANGZHOU-SOUTHBASE-IDC China TelecomRPKI Not found36.111.209.0
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.