_acme-challenge.root-servers.org. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY CAA
Question and response
Question
dig root-servers.org. NSEC
Answer
root-servers.org. 3600 NSEC _acme-challenge.root-servers.org. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY CAA
Authority
root-servers.org. 3600 NS a.icann-servers.net.
root-servers.org. 3600 NS ns.maxgigapop.net.
root-servers.org. 3600 NS nnp.netnod.se.
root-servers.org. 3600 NS sec2.authdns.ripe.net.
root-servers.org. 3600 NS ns-ext.isc.org.
root-servers.org. 3600 NS jokulsa.asbyrgi.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0