shell:$ nslookup -timeout=2 -retry=1 'ib.adnxs.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
ib.adnxs.com	canonical name = xandr-g-geo.trafficmanager.net.
xandr-g-geo.trafficmanager.net	canonical name = ib.anycast.adnxs.com.
Name:	ib.anycast.adnxs.com
Address: 68.67.179.87
Name:	ib.anycast.adnxs.com
Address: 68.67.160.137
Name:	ib.anycast.adnxs.com
Address: 68.67.160.114
Name:	ib.anycast.adnxs.com
Address: 68.67.179.89
Name:	ib.anycast.adnxs.com
Address: 68.67.179.155
Name:	ib.anycast.adnxs.com
Address: 68.67.160.184
Name:	ib.anycast.adnxs.com
Address: 68.67.181.248
Name:	ib.anycast.adnxs.com
Address: 68.67.160.26
Name:	ib.anycast.adnxs.com
Address: 68.67.179.153
Name:	ib.anycast.adnxs.com
Address: 68.67.161.182
Name:	ib.anycast.adnxs.com
Address: 68.67.160.75
Name:	ib.anycast.adnxs.com
Address: 68.67.179.164