dns.otelco.net has no NS records.
NS records for this zone are defined at otelco.net.
NS records for this zone are defined at otelco.net.
Question and response
Question
dig dns.otelco.net. NS
Answer
The response has no answer records.
Authority
otelco.net. 900 SOA ns1.otelco.net. root.iland.net. 2020022100 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0