shell:$ nslookup -timeout=2 -retry=1 'a.config.skype.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
a.config.skype.net	canonical name = skypeecs-int-c2s.trafficmanager.net.
skypeecs-int-c2s.trafficmanager.net	canonical name = mira.config.skype.net.
mira.config.skype.net	canonical name = outlook.ha-sdf.office365.com.
outlook.ha-sdf.office365.com	canonical name = outlook.ms-acdc-sdf.office.com.
outlook.ms-acdc-sdf.office.com	canonical name = DSM-efz.ms-acdc-sdf.office.com.
Name:	DSM-efz.ms-acdc-sdf.office.com
Address: 52.96.27.2
Name:	DSM-efz.ms-acdc-sdf.office.com
Address: 52.96.119.146
Name:	DSM-efz.ms-acdc-sdf.office.com
Address: 2603:1036:301:4011::2
Name:	DSM-efz.ms-acdc-sdf.office.com
Address: 2603:1036:301:2114::2