General Query

dig @ns2.dnsserver.com TXT domain.com +short   

With the +short it will show only the value of the queried field(s). Without +short  it will show the full result

Querying CNAME records 

dig @ns2.dnsserver.com CNAME 4xugchxxxxxxxxxxxxxxxxxx3eread3uc._domainkey.domain.com +short

This will return the value of that particular CNAME field.

Querying particular entry

dig @ns2.dnsserver.com TXT domain.com +short
dig @ns2.dnsserver.com NS domain.com +short