robot.first-ns.de has no NS records.
NS records for this zone are defined at first-ns.de.
NS records for this zone are defined at first-ns.de.
Question and response
Question
dig robot.first-ns.de. NS
Answer
The response has no answer records.
Authority
first-ns.de. 601 SOA ns1.your-server.de. postmaster.your-server.de. 2025120200 86400 1800 3600000 601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0