o1.em.armssoftware.com has no CNAME records.
Question and response
Question
dig o1.em.armssoftware.com. NS
Answer
The response has no answer records.
Authority
armssoftware.com. 641 SOA pdns01.domaincontrol.com. dns.jomax.net. 2026021307 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0