shell:$ nslookup -timeout=2 -retry=1 'bookingbug-dev.auth.eu-west-1.amazoncognito.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 52.19.137.31
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 34.254.38.12
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 52.214.169.49
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 2a05:d018:478:8a02:3fd0:37fe:8c2d:bb71
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 2a05:d018:478:8a00:758a:6dab:29a1:8754
Name:	bookingbug-dev.auth.eu-west-1.amazoncognito.com
Address: 2a05:d018:478:8a01:7c89:fd87:ad28:909c