shell:$ nslookup -timeout=2 -retry=1 'cdn.ably.io'
Server:		1.1.1.1
Address:	1.1.1.1#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: 3.162.174.69
Name:	d17if134pyeemt.cloudfront.net
Address: 3.162.174.16
Name:	d17if134pyeemt.cloudfront.net
Address: 3.162.174.40
Name:	d17if134pyeemt.cloudfront.net
Address: 3.162.174.104
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:b400:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:2000:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:a600:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:4800:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:d000:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:600:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:c000:5:57e9:e540:93a1
Name:	d17if134pyeemt.cloudfront.net
Address: 2600:9000:2873:4600:5:57e9:e540:93a1