shell:$ nslookup -timeout=2 -retry=1 'auth.three.co.uk'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
auth.three.co.uk	canonical name = prod-auth-3uk-cd-l7sr7tmgkffsuzzv.edge.tenants.eu.auth0.com.
prod-auth-3uk-cd-l7sr7tmgkffsuzzv.edge.tenants.eu.auth0.com	canonical name = prod-auth-3uk.eu.auth0.com.
prod-auth-3uk.eu.auth0.com	canonical name = c03krn.eu.auth0.com.pivot.prod.auth0edge.com.
c03krn.eu.auth0.com.pivot.prod.auth0edge.com	canonical name = auth0-ingress.eu.auth0.com.cdn.cloudflare.net.
Name:	auth0-ingress.eu.auth0.com.cdn.cloudflare.net
Address: 104.18.34.171
Name:	auth0-ingress.eu.auth0.com.cdn.cloudflare.net
Address: 172.64.153.85
Name:	auth0-ingress.eu.auth0.com.cdn.cloudflare.net
Address: 2a06:98c1:3101::ac40:9955
Name:	auth0-ingress.eu.auth0.com.cdn.cloudflare.net
Address: 2a06:98c1:3102::6812:22ab