20.47.3.0/24

ip:	20.47.3.0 
loc:	United States, Chicago (Illinois)  
isp:	AS8069 Microsoft Corporation » Microsoft Corporation » Microsoft Azure Cloud - Storage (northcentralus) 353.282 ms
route:	20.47.3.0/24, MSFT - Microsoft Corporation, US (Chicago) ... 
reg:	20.40.0.0/13, US, ARIN, 2017-10-18
asn:	AS8069 - MICROSOFT-CORP-MSN-AS-BLOCK Microsoft Corporation, US
addr:	  One Microsoft Way Redmond WA 98052 US
online:	  1 » latency: 117 ms (117ms) 

see also:
   20.40.0.0/13     AS8075   MSFT Microsoft Corporation, US