20.33.4.0/24

ip:	20.33.4.0 
loc:	United States, San Antonio (Texas)  
isp:	AS8069 Microsoft Corporation » Microsoft Corporation » Microsoft Azure Cloud (southcentralus) 391.502 ms
route:	20.33.4.0/24, MSFT - Microsoft Corporation, US (SAN ANTONIO) ... 
reg:	20.33.0.0/16, US, ARIN, 2017-10-18
asn:	AS8069 - MICROSOFT-CORP-MSN-AS-BLOCK Microsoft Corporation, US
addr:	  One Microsoft Way Redmond WA 98052 US
online:	  13 » latency: 146 ms (146ms) 

see also:
   20.33.0.0/16     AS8075   MSFT Microsoft Corporation, US