Links

NTP Ports

Microsoft Windows

• Windows NT / 2000 / XP / Windows .NET Server 2003 - Maintained by TerjeMathisen (terje.mathisen@hda.hydro.com)
• Windows NT 4, Windows 2000, Windows XP, Windows 2003 Server - English - Maintained by HeikoGerstung
• Windows NT 4, Windows 2000, Windows XP, Windows 2003 Server - German - Maintained by HeikoGerstung

Other Related links

Commercial NTP related products are listed on the Vendor Links page.

Hardware

• A shielded loop antenna for WWVB
• How to build a simple radio clock to interface with a PC
• A simple MSF based NTP server for AVR

Software

Please see the NIST Internet Time Service (ITS) page for a list of publishers of computer clock synchronization software.

C

• ntpclient - an NTP (RFC-1305) client
• ntpstat - a simple utility for displaying the NTP synchronisation state of the localhost
• OmniSync - an ntpd driver for those challenged by a firewall. It allows you to sync against the daytime service (port 13 tcp/udp), time (port 37 tcp/udp), SNTS, ICMP, SNMP, precision time protocol (PTP - IEEE 1588), (S)NTP via a socks5 proxy server, http and https (both also via proxy server). Maintained by FolkertvanHeusden

Haskell

• hsntp: Libraries to use SNTP protocol and small client/server implementations

Perl

• MRTG Script to Display Clock Drift
• Net::NTP Module
• POE::Component::Client::NTP
• SNTP date and time (UTC) from an NTP time server

Python

• NTP library

Ruby

• ntpstat.rb - Status report of a local NTP server (a port of ntpstat.c)

TCL

• NTP plugin for a detachable nmea GPS source

Windows Binaries

• NTP Time Server Monitor - for Windows NT / 2000 / XP / 2003 Server
• NIST Software

Time Related Web-sites

• A summary of the ISO 8601 time notation
• json-time
• NIST Internet Time Service (ITS)
• NIST - Time & Frequency Division
• Wierd Clock Links
• Yahoo's "Units and Time" directory

Online Time Services

• NIST Official Time
• U.S. Navy Time (index)

Where to find Third Party NTP software

• NIST Internet Time Service software list - Maintained by the NIST Time and Frequency division. Includes links to NTP software for Windows and MacOS.