fiserv has no NS records.
NS records for this zone are defined at fiserv..
NS records for this zone are defined at fiserv..
Question and response
Question
dig fiserv. NS
Answer
The response has no answer records.
Authority
. 86400 SOA a.root-servers.net. nstld.verisign-grs.com. 2026022402 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0