Dynamic collection of networked computers providing time synchronization
NTP pool
URL
www.ntppool.org/en/
Launched
2003; 21 years ago (2003)[1]
The NTP pool is a dynamic collection of networked computers that volunteer to provide highly accurate time via the Network Time Protocol to clients worldwide. The machines that are "in the pool" are part of the pool.ntp.org domain as well as of several subdomains divided by geographical zone and are distributed to NTP clients via round-robin DNS. Work is being done to make the geographic zone selection unnecessary via customized authoritative DNS servers that utilize geolocation software.
As of May 2022[update], the pool consists of 3,126 active servers on IPv4 and 1,534 active servers on IPv6.[2] Because of the decentralization of this project, accurate statistics on the number of clients cannot be obtained, but according to the project's website, the pool provides time to 5–15 million systems.[3] Because of client growth, the project is in perpetual need of more servers.[4][5][6]
The more time servers there are in the pool, the lower the resource demand on each member. Joining the pool requires at least a broadband connection to the Internet, a static IP address, and accurate time from another source (for example, another NTP server, a DCF77 receiver, a WWVB receiver, or a GNSS receiver).
This project was started by Adrian von Bidder in January 2003 after a discussion on comp.protocols.time.ntp about abuse of the public stratum 1 servers.[7][8] The system has been maintained and developed by Ask Bjørn Hansen since July 2005.[9]
^"What the NTP Pool can offer". Retrieved April 29, 2011.
The NTPpool is a dynamic collection of networked computers that volunteer to provide highly accurate time via the Network Time Protocol to clients worldwide...
NTP server misuse and abuse covers a number of practices which cause damage or degradation to a Network Time Protocol (NTP) server, ranging from flooding...
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0183 NTP FAQ for detailed descriptions of reference clocks used by a computer timeserver. Official site of the Network Time Protocol (NTP) Pool of public...
Linux Configure an NTP Client And Server Generic Linux notes Setting up NTP on Windows Setting up on Linux/Windows/Macintosh the NTP Servers Pooling...
of NEF | National Education Foundation". nef.gov.pk. "National Talent Pool (NTP) announces Rs. 20 million for QAU". Quaid-i-Azam University. Retrieved...
fluorescently labeled dideoxynucleotides (ddNTP) or fluorescently labeled deoxynucleotides (dNTP). With ddNTPs, probes hybridize to the target DNA immediately...
balanced pool of deoxyribonucleotides. Eukaryotic cells with class IA reductases have a mechanism of negative control to turn off synthesis of dNTPs as they...
configuration server replies to the request by assigning an IP address from a pool of addresses, which is preconfigured by an administrator. BOOTP is implemented...
addresses, such as File Transfer Protocol (FTP) and Network Time Protocol (NTP), where the new address format may cause conflicts with existing protocol...
Eclipse 500 aircraft from Eclipse Aviation among an increasingly growing pool of uses. Composites or composite materials are a combination of materials...
engine via the turbo. An oil bath air cleaner consists of a sump containing a pool of oil, and an insert which is filled with fiber, mesh, foam, or another...
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It is based on BOOTP, but can dynamically allocate IP addresses from a pool and reclaim them when they are no longer in use. It can also be used to deliver...
liquid flows down to the boiler, with no bends in the tubing for liquid to pool. Also, the thermosiphon's fan that cools the gas needs cool air to operate...
Access-Accept: The specific IP address to be assigned to the user The address pool from which the user's IP address should be chosen The maximum length of time...
of the Vietnam Veterans Movement. Carroll & Graf. ISBN 978-0-7867-1403-2. NTP (National Toxicology Program); "Toxicology and Carcinogenesis Studies of...
version of NTP also supports Automatic server discovery. There are three schemes provided by NTPv4: Broadcast / Multicast Manycast Server pool Automatic...
remote testing and management. In the 1980s, it became apparent that the pool of available IPv4 addresses was depleting at a rate that was not initially...
in number because GPS satellites and the Internet Network Time Protocol (NTP) provide equally accurate time standards. A two-way radio is an audio transceiver...
(dNTPs) to inorganic phosphate (iPPP) and a 2'-deoxynucleoside (i.e. deoxynucleosides without a phosphate group). In doing so, SAMHD1 depletes the pool...
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