ns01.fairisaac.com has no NS records.
NS records for this zone are defined at fairisaac.com.
NS records for this zone are defined at fairisaac.com.
Question and response
Question
dig ns01.fairisaac.com. NS
Answer
The response has no answer records.
Authority
fairisaac.com. 300 SOA ns02.fairisaac.com. please_set_email.absolutely.nowhere. 17563 10800 3600 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0