I have prefix e.164 that I need to change by domainame, but I have problem with DNS.

 

 When I have prefix "19991" I need to change URI by "@domainname.br". Is the regexp "!^.*$sip:.+$!@domainname.br" correct?

 

 

$ORIGIN 1.9.9.9.1.e164.arpa.
   IN NAPTR 1 10 "E2U+sip" "!^.*$sip:.+$!@domainname.br".