shell:$ nslookup -timeout=2 -retry=1 'cdn.ably.io'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
cdn.ably.io	canonical name = cdn.ably.com.
cdn.ably.com	canonical name = d17if134pyeemt.cloudfront.net.
Name:	d17if134pyeemt.cloudfront.net
Address: 18.238.26.32
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:c00:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:5a00:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:6800:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:5e00:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:9800:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:de00:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:f400:5:57e9:e553:c21
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:25f5:1000:5:57e9:e553:c21