mailhost2.callidusondemand.com has no NS records.
NS records for this zone are defined at callidusondemand.com.
NS records for this zone are defined at callidusondemand.com.
Question and response
Question
dig mailhost2.callidusondemand.com. NS
Answer
The response has no answer records.
Authority
callidusondemand.com. 3600 SOA pdns1.ultradns.net. sysadmin.callidussoftware.com. 2015050618 10800 3600 2592000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0