Overview of services running on Port 123 UDP.
~217 Thousand IP addresses observed from May to December 2012
To get raw lists of the data go to Download. For an explanation of what this data is and how it was obtained, see Paper.

Servicename Product Version InfoOSDevicetypeCount Percent
no match12239256.145
ntpNTPv47185232.961
ntpNTPv32210510.14
ntpNTPv4unsynchronized10640.488
ntpMicrosoft NTPWindows3410.156
netbios-ssn1200.055
socks5890.041