=> 0: HSDN NTP серверы ntp0.ntp-servers.net, ntp1.ntp-servers.net, ntp2.ntp-servers.net, ntp3.ntp-servers.net, ntp4.ntp-servers.net, ntp5.ntp-servers.net, ntp6.ntp-servers.net => 1: IETF's leap seconds database => 2: MSK-IX NTP-server 194.190.168.1, 2001:6d0:ffd4::1 also in: [Links/Russian] => 3: Network Time Protocol Best Current Practices => 4: time-nuts Discussion of precise time and frequency measurement also in: [Links/Maillist] => 5: ФГУП "ВНИИФТРИ" ntp1.vniiftri.ru, ntp2.vniiftri.ru, ntp3.vniiftri.ru, ntp4.vniiftri.ru, ntp5.vniiftri.ru, ntp1.niiftri.irkutsk.ru, ntp2.niiftri.irkutsk.ru, ntp.sstf.nsk.ru, timesstf.sstf.nsk.ru, ntp.kam.vniiftri.net