31.23.0.0/17

ip:	31.23.0.0 0.0.23.31.donpac.ru
loc:	Russia, Gorlovka (Rostov Oblast)  
isp:	AS12389 PJSC Rostelecom » BRAS Huawei ME60 (128kusers) » OJSC Rostelecom Macroregional Branch South 1.312 ms
route:	31.23.0.0/17, MACROREGIONAL_SOUTH - OJSC Rostelecom Macroregional Branch South, RU (Rostov-on-Don) ... 
reg:	31.23.0.0/16, RU, RIPE, 2011-03-28
asn:	AS12389 - ROSTELECOM-AS PJSC Rostelecom, RU
addr:	  wert@donpac.ru
online:	  18.219 » latency: 69 ms (122ms) 

see also:
   31.23.0.0/16     AS12389  RU-RTK-20110328 PJSC Rostelecom, RU