shell:$ nslookup -timeout=2 -retry=1 'fcb.fcbchi-azure.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
fcb.fcbchi-azure.com	canonical name = fcbchifrontdoor-gxdfhjh2hqdzdfdh.a02.azurefd.net.
fcbchifrontdoor-gxdfhjh2hqdzdfdh.a02.azurefd.net	canonical name = mr-a02.tm-azurefd.net.
mr-a02.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: 13.107.253.51
Name:	part-0023.t-0009.fb-t-msedge.net
Address: 13.107.226.51
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