In Mac OS X, how do I check what DNS server I'm currently using (preferably a command line solution)?
System Preferences > Network shows
192.168.1.1, which is my router's address and not the real DNS server.
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Use the following command to view your DNS server in Mac OS X :
Open the terminal and type
$ cat /etc/resolv.conf
to view your DNS server.
Sample output :
$ cat /etc/resolv.conf domain http://www.example.com (Here, you can see DNS records info of the particular domain name.) nameserver 18.104.22.168 nameserver 22.214.171.124
Akamai provides a DNS debugging tool which returns the IP address of the resolver used for the query. Open Terminal.app and run the following command:
dig whoami.akamai.net +short
UltraDNS also provides one, but I've found it to be less reliable:
dig whoami.ultradns.net +short
The IP address returned by these tools is a DNS resolver in use for your network, but may be only one of several. There might be an advantage to using the IP in your Network preferences directly.
You can benchmark the performance of your local and alternate DNS servers using namebench.
I reached to this question while I was looking for a way to get the list of DNS servers of a specific network adapter in text format (for example the Wi-Fi adapter):
This DNS servers list can be obtained in the terminal with this command:
$ networksetup -getdnsservers Wi-Fi 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 192.168.1.1
And for Ethernet adapter:
$ networksetup -getdnsservers Ethernet 18.104.22.168 22.214.171.124 126.96.36.199 188.8.131.52 192.168.1.1