Whois and reverse dns lookup provided by robtex


DNS delegation of mail.viettel.com.vn updated:


2mail.viettel.com.vn.vn.b.dns-servers.vn. c.dns-servers.vn. d.dns-servers.vn. a.dns-servers.vn. f.dns-servers.vn. e.dns-servers.vn. vn.cctld.authdns.ripe.net.
We pick g.root-servers.net, one of the 13 root servers (1), and ask it about mail.viettel.com.vn and learn that vn is delegated to seven name servers (2), so we ask b.dns-servers.vn where we learn that viettel.com.vn is delegated to two name servers, including dns2.vietel.com.vn (3), so we ask that one and get the following answer:

Authoritative answer

ANSWER for mail.viettel.com.vn.
mail.viettel.com.vn.86400 A125.235.240.40 mail.viettel.com.vn points to
AUTHORITATIVE for mail.viettel.com.vn.
viettel.com.vn.86400 NS dns2.vietel.com.vn. viettel.com.vn use dns2.vietel.com.vn as name server.
86400 NS dns1.vietel.com.vn. viettel.com.vn use dns1.vietel.com.vn as name server.
ADDITIONAL for mail.viettel.com.vn.
dns1.vietel.com.vn.86400 A203.113.131.1
dns2.vietel.com.vn.86400 A203.113.188.2

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