shell:$ nslookup -timeout=2 -retry=1 'opensignal-nsu.akamaihd.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
opensignal-nsu.akamaihd.net	canonical name = a2047.g.akamai.net.
Name:	a2047.g.akamai.net
Address: 23.199.54.21
Name:	a2047.g.akamai.net
Address: 23.199.54.15
Name:	a2047.g.akamai.net
Address: 23.199.54.14
Name:	a2047.g.akamai.net
Address: 23.199.54.13
Name:	a2047.g.akamai.net
Address: 23.199.54.18
Name:	a2047.g.akamai.net
Address: 23.199.54.20
Name:	a2047.g.akamai.net
Address: 23.199.54.19
Name:	a2047.g.akamai.net
Address: 23.199.54.22
Name:	a2047.g.akamai.net
Address: 23.199.54.16