ftp.wcc.net has no NS records.
NS records for this zone are defined at wcc.net.
NS records for this zone are defined at wcc.net.
Question and response
Question
dig ftp.wcc.net. NS
Answer
The response has no answer records.
Authority
wcc.net. 900 SOA ns1.centex.net. please_set_email.absolutely.nowhere. 43 10800 3600 2592000 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0