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
If the CNAME or TXT records are not displayed with normally available online tools, then they can be found using
dig TXT _axxxxxxxs.kolkataonweb.com +short OR dig CNAME 4xxxxxxxxxxxxxxxxxc._domainkey.kolkataonweb.com +short (mention the keys that you want to lookup)
If everything is fine then the answer section will return the record (like below)
;; ANSWER SECTION: xxxxxxxxxxxx 3584 IN CNAME xxxxxxxxxxxxxxxxxx
The +short can be omitted or +all can be used or nothing can be given