shell:$ nslookup -timeout=2 -retry=1 'exchange.telstra.com.au'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
exchange.telstra.com.au	canonical name = d3blk76jcum585.cloudfront.net.
Name:	d3blk76jcum585.cloudfront.net
Address: 18.172.122.5
Name:	d3blk76jcum585.cloudfront.net
Address: 18.172.122.114
Name:	d3blk76jcum585.cloudfront.net
Address: 18.172.122.125
Name:	d3blk76jcum585.cloudfront.net
Address: 18.172.122.65
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:8c00:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:ce00:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:7800:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:800:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:bc00:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:4000:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:da00:a:16c0:7d40:93a1
Name:	d3blk76jcum585.cloudfront.net
Address: 2600:9000:24bd:d600:a:16c0:7d40:93a1