172.58.176.0/21

ip:	172.58.176.0 
loc:	United States, Dallas (Texas)  
isp:	AS21928 T-Mobile USA, Inc. » T-Mobile USA, Inc. » T-Mobile USA 2286.66 ms
route:	172.58.176.0/21, TMO9 - T-Mobile USA, Inc., US (Dallas) ... 
reg:	172.32.0.0/11, US, ARIN, 2012-09-18
asn:	AS21928 - T-MOBILE-AS21928 T-Mobile USA Inc., US
	  AS6461  - ZAYO-6461 Zayo Bandwidth, US
addr:	  12920 SE 38th Street Bellevue WA 98006 US

see also:
   172.32.0.0/11    AS21928  TMO9 T-Mobile USA, Inc., US
   172.58.0.0/15    AS21928  TMO9 T-Mobile USA, Inc., US