sandiego.ca.us.undernet.org has no NS records.
NS records for this zone are defined at undernet.org.
NS records for this zone are defined at undernet.org.
Question and response
Question
dig sandiego.ca.us.undernet.org. NS
Answer
The response has no answer records.
Authority
undernet.org. 1800 SOA alice.ns.cloudflare.com. dns.cloudflare.com. 2398839914 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0