EN: Central Office of Measures
Email: time@gum.gov.pl
tempus1.gum.gov.pl
194.146.251.100
tempus2.gum.gov.pl
194.146.251.101
EN: Research and Academic Computer Network
Email: nask@nask.pl
ntp.nask.pl
195.187.245.55
EN: Orange Poland
ntp1.tp.pl
80.50.231.226
2a01:1102::b:0:0:0:2
ntp2.tp.pl
212.160.106.226
2a01:1100:3::2
ntp1.orange.pl
80.50.102.114
ntp2.orange.pl
80.50.102.206
ntp3.orange.pl
80.50.102.126
EN: University of Warsaw
Email: sekretariat@icm.edu.pl
ntp1.icm.edu.pl
213.135.57.60
2001:6a0::2000:0:0:0:60
ntp2.icm.edu.pl
193.219.28.60
2001:6a0::2002:0:0:0:60
EN: National Institute of Telecommunications
Email: info@il-pib.pl
ntp.itl.waw.pl
193.110.137.171
EN: Space Research Centre of Polish Academy of Sciences
Email: cbk@cbk.waw.pl
vega.cbk.poznan.pl
150.254.190.51
EN: Nicolaus Copernicus University in Toruń
Email: contact@umk.pl
time.umk.pl
158.75.5.245
EN: Warsaw University of Technology
Email: cwm@cwm.pw.edu.pl
ntp.coi.pw.edu.pl
194.29.130.252
EN: Adam Mickiewicz University, Poznań
Email: dwz@amu.edu.pl
ntp.amu.edu.pl
150.254.65.61
ntp2.amu.edu.pl
150.254.65.62