Blog DNS Toolbox: How to Perform a Full DNS Enumeration and Domain Research

A records

Citigroup
192.193.218.130   356
192.193.102.175   356

AAAA records

NO RECORDS

MX records

Proofpoint, Inc.
5 mx-b.mail.citi.com40
5 mx-a.mail.citi.com40

NS records

VeriSign Infrastructure & Operations
ns2.nsroot2.com2,273
ns1.nsroot1.com2,273

SOA records

ttl: 3,600
email: hostmaster@citi.com2,359

TXT

v=spf1 a:1._spf.citigroup.com a:2._spf.citigroup.c Show more