It can be anything! An apex, subdomain, or even a URL.

Results foruds-common-prd.aws.dnssecurity.services

Resolver

Location

NS

Name	TTL	Value
uds-common-prd.aws.dnssecurity.services	172800	ns-469.awsdns-58.com
uds-common-prd.aws.dnssecurity.services	172800	ns-661.awsdns-18.net
uds-common-prd.aws.dnssecurity.services	172800	ns-1038.awsdns-01.org
uds-common-prd.aws.dnssecurity.services	172800	ns-1613.awsdns-09.co.uk

Name	TTL	Value
uds-common-prd.aws.dnssecurity.services	900	ns-661.awsdns-18.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400