shell:$ nslookup -timeout=2 -retry=1 'krs.microsoft.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
krs.microsoft.com	canonical name = kmas-prod.azurefd.net.
kmas-prod.azurefd.net	canonical name = mr-azurefd.tm-azurefd.net.
mr-azurefd.tm-azurefd.net	canonical name = dual.part-0023.t-0009.fb-t-msedge.net.
dual.part-0023.t-0009.fb-t-msedge.net	canonical name = part-0023.t-0009.fb-t-msedge.net.
Name:	part-0023.t-0009.fb-t-msedge.net
Address: 13.107.226.51
Name:	part-0023.t-0009.fb-t-msedge.net
Address: 13.107.253.51
Name:	part-0023.t-0009.fb-t-msedge.net
Address: 2620:1ec:29:1::51
Name:	part-0023.t-0009.fb-t-msedge.net
Address: 2620:1ec:48:1::51