Can I use vcards with my own domain?

Yes , it is possible to use the vcard system under a subdomain of your property. 
 For example, if you own the domain my-company.com , you could access your vcards under any subdomain, such as vcards.my-company.com . On your end, you would only need to create an entry in your DNS service as follows. 
 type: CNAME
name: vcards.my-company.com
value: vcards-go.tictap.me
 
 After making this change, you will need to notify us that you wish to use your own subdomain so we can update the URLs of your cards.