There are a number of DNS Looking Glass sites around the Internet that will allow anyone to send a DNS query from that location. Looking Glasses are of particular use in the case of troubleshooting a problem with a DNS zone that is served from an anycasted service. In the event of a problem with the service, the view of a zone can be very different from distant places on the Internet. Here is a list of some of the known looking glass sites around the Internet:
- http://dns.comcast.net/dig-tool.php
- http://live.icmynet.com/icmynet-dns/
- http://networking.ringofsaturn.com/Tools/dig.php
- http://www.bortzmeyer.org/dns-lg.html
- http://www.digwebinterface.com/
- http://www.dns-lg.com/
- http://www.hscripts.com/tools/HDNT/dns-record.php
- http://www.kloth.net/services/dig.php
- http://www.statdns.com/api/
- http://www.whatsmydns.net/
- http://www.zonecut.net/dns/index.cgi