v1.h4.root-servers.org has no NS records.
NS records for this zone are defined at root-servers.org.
NS records for this zone are defined at root-servers.org.
Question and response
Question
dig v1.h4.root-servers.org. NS
Answer
The response has no answer records.
Authority
root-servers.org. 3600 SOA v1.h4.root-servers.org. hostmaster.root-servers.org. 2026030600 3600 300 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0