shell:$ nslookup -timeout=2 -retry=1 'nbnspeedtest.telstra.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
nbnspeedtest.telstra.com	canonical name = amp-cf-nbnspeedtest-telstra-com.5f568e0fd0.sdpamp.com.
Name:	amp-cf-nbnspeedtest-telstra-com.5f568e0fd0.sdpamp.com
Address: 3.167.99.58
Name:	amp-cf-nbnspeedtest-telstra-com.5f568e0fd0.sdpamp.com
Address: 3.167.99.115
Name:	amp-cf-nbnspeedtest-telstra-com.5f568e0fd0.sdpamp.com
Address: 3.167.99.66
Name:	amp-cf-nbnspeedtest-telstra-com.5f568e0fd0.sdpamp.com
Address: 3.167.99.117