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BGP Prefix Lookup

Enter a prefix (or a single address). Answered from our daily copy of the global routing table.

Examples:

61.147.0.0/16

One collector's view (APNIC). A route filtered before it reaches that collector is not listed.

Announced exactly

Registry
APNIC · China · Mar 14, 2000
Delegated block
61.144.0.0 – 61.147.255.255

Covering routes

0

No less-specific route covers it.

More-specific routes

78 more-specifics from 5 origin AS(es)
  • 61.147.67.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.67.0
  • 61.147.68.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.68.0
  • 61.147.69.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.69.0
  • 61.147.70.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.70.0
  • 61.147.72.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.72.0
  • 61.147.73.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.73.0
  • 61.147.74.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.74.0
  • 61.147.75.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.75.0
  • 61.147.77.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.77.0
  • 61.147.78.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.78.0
  • 61.147.80.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.80.0
  • 61.147.81.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.81.0
  • 61.147.82.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.82.0
  • 61.147.83.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.83.0
  • 61.147.84.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.84.0
  • 61.147.85.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.85.0
  • 61.147.88.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.88.0
  • 61.147.89.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.89.0
  • 61.147.90.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.90.0
  • 61.147.91.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.91.0
  • 61.147.92.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.92.0
  • 61.147.93.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.93.0
  • 61.147.94.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.94.0
  • 61.147.95.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.95.0
  • 61.147.96.0/22AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.96.0
  • 61.147.96.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.96.0
  • 61.147.97.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.97.0
  • 61.147.98.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.98.0
  • 61.147.99.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.99.0
  • 61.147.100.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.100.0
  • 61.147.102.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.102.0
  • 61.147.103.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.103.0
  • 61.147.104.0/22AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.104.0
  • 61.147.104.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.104.0
  • 61.147.105.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.105.0
  • 61.147.106.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.106.0
  • 61.147.107.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.107.0
  • 61.147.108.0/23AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.108.0
  • 61.147.110.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.110.0
  • 61.147.111.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.111.0
  • 61.147.112.0/23AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.112.0
  • 61.147.114.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.114.0
  • 61.147.115.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.115.0
  • 61.147.116.0/22AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.116.0
  • 61.147.116.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.116.0
  • 61.147.117.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.117.0
  • 61.147.118.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.118.0
  • 61.147.119.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.119.0
  • 61.147.120.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.120.0
  • 61.147.121.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.121.0
  • 61.147.122.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.122.0
  • 61.147.123.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.123.0
  • 61.147.124.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.124.0
  • 61.147.125.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.125.0
  • 61.147.126.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.126.0
  • 61.147.127.0/24AS137697CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.RPKI Valid61.147.127.0
  • 61.147.136.0/21AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.136.0
  • 61.147.165.0/24AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.165.0
  • 61.147.166.0/23AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.166.0
  • 61.147.168.0/21AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.168.0
  • 61.147.176.0/22AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.176.0
  • 61.147.180.0/24AS137702Nanjing, Jiangsu Province, P.R.China.RPKI Valid61.147.180.0
  • 61.147.181.0/24AS138950Jiangsu Wuxi International IDC networkRPKI Valid61.147.181.0
  • 61.147.182.0/23AS138950Jiangsu Wuxi International IDC networkRPKI Valid61.147.182.0
  • 61.147.184.0/22AS138950Jiangsu Wuxi International IDC networkRPKI Valid61.147.184.0
  • 61.147.188.0/24AS138950Jiangsu Wuxi International IDC networkRPKI Valid61.147.188.0
  • 61.147.189.0/24AS23650AS Number for CHINANET jiangsu province backboneRPKI Valid61.147.189.0
  • 61.147.190.0/23AS23650AS Number for CHINANET jiangsu province backboneRPKI Valid61.147.190.0
  • 61.147.197.0/24AS23650AS Number for CHINANET jiangsu province backboneRPKI Valid61.147.197.0
  • 61.147.198.0/24AS23650AS Number for CHINANET jiangsu province backboneRPKI Valid61.147.198.0
  • 61.147.218.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.218.0
  • 61.147.219.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.219.0
  • 61.147.222.0/23AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.222.0
  • 61.147.224.0/22AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.224.0
  • 61.147.231.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.231.0
  • 61.147.232.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.232.0
  • 61.147.238.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.238.0
  • 61.147.239.0/24AS131325CHINATELECOM JIANGSU province NANTONG MAN networkRPKI Valid61.147.239.0

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.

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