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: 68.67.181.231
Name:	ib.anycast.adnxs.com
Address: 68.67.161.208
Name:	ib.anycast.adnxs.com
Address: 68.67.160.132
Name:	ib.anycast.adnxs.com
Address: 68.67.160.184
Name:	ib.anycast.adnxs.com
Address: 68.67.160.137
Name:	ib.anycast.adnxs.com
Address: 68.67.181.211
Name:	ib.anycast.adnxs.com
Address: 68.67.179.155
Name:	ib.anycast.adnxs.com
Address: 68.67.181.248
Name:	ib.anycast.adnxs.com
Address: 68.67.160.117
Name:	ib.anycast.adnxs.com
Address: 68.67.181.102
Name:	ib.anycast.adnxs.com
Address: 68.67.160.76
Name:	ib.anycast.adnxs.com
Address: 68.67.179.89