shell:$ nslookup -timeout=2 -retry=1 'opensignal-nsu.akamaihd.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
opensignal-nsu.akamaihd.net	canonical name = a2047.g.akamai.net.
Name:	a2047.g.akamai.net
Address: 23.44.201.213
Name:	a2047.g.akamai.net
Address: 23.44.201.217
Name:	a2047.g.akamai.net
Address: 23.44.201.199
Name:	a2047.g.akamai.net
Address: 23.44.201.207
Name:	a2047.g.akamai.net
Address: 23.44.201.205
Name:	a2047.g.akamai.net
Address: 23.44.201.208
Name:	a2047.g.akamai.net
Address: 23.44.201.204
Name:	a2047.g.akamai.net
Address: 23.44.201.198
Name:	a2047.g.akamai.net
Address: 23.44.201.218