mkt.allstream.com has no CNAME records.
Question and response
Question
dig mkt.allstream.com. NS
Answer
The response has no answer records.
Authority
allstream.com. 2219 SOA nsx.integraonline.com. itops.zayo.com. 2026011502 300 7200 604800 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0