ctbctelecom.com.br.	30 IN SOA nspar.ctbc.com.br. internet.ctbctelecom.net.br. (
				2023071701 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

Mail exchangers:
ctbctelecom.com.br.	30 IN MX 10 mail.ctbctelecom.com.br.

Name servers:
ctbctelecom.com.br.	30 IN NS nssar.ctbc.com.br.
ctbctelecom.com.br.	30 IN NS nspar.ctbc.com.br.