Directory of public looking-glass servers
Pick a looking-glass provider. On their site choose BGP and enter the prefix you want to inspect. We do not host a looking glass.
| Provider | ASN | Looking glass |
|---|---|---|
| Arelion | AS1299 | https://lg.arelion.com/ |
| NTT | AS2914 | https://www.gin.ntt.net/looking-glass/ |
| Hurricane Electric | AS6939 | https://lg.he.net/ |
| Lumen | AS209 | https://lookingglass.centurylink.com/ |
| Cogent | AS174 | https://www.cogentco.com/en/network/looking-glass |
| SWITCH | AS559 | https://www.switch.ch/network/tools/looking-glass/ |
| Init7 | AS13030 | https://lg.init7.net/ |
| CERN | AS513 | https://looking-glass.cern.ch/ |
| Telus | AS852 | https://lg.telus.com/ |
| BT Global | AS5400 | https://www.ip.network.bt.com/ |
| Internode | AS4739 | https://lg.internode.on.net/ |
| Sakura Internet | AS9370 | https://lg.sakura.ad.jp/ |
A looking glass lets you query a remote router’s BGP table. Pick a provider, choose BGP, and enter a prefix.