shell:$ nslookup -timeout=2 -retry=1 'portal.blob.core.windows.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
portal.blob.core.windows.net	canonical name = blob.dm3prdstr12a.store.core.windows.net.
Name:	blob.dm3prdstr12a.store.core.windows.net
Address: 57.150.134.129