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