systems.oss.centurylink.net has no CNAME records.
Question and response
Question
dig systems.oss.centurylink.net. NS
Answer
The response has no answer records.
Authority
oss.centurylink.net. 3600 SOA authns2.qwest.net. abuse.aup.lumen.com. 2260302000 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0