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Always on time with NTP monitoring


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    PRTG monitors
    your NTP Servers

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    Identify sources of errors more quickly with NTP Monitoring

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    Our dashboard lets you
    keep an eye on everything

Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.






NTP Monitoring makes troubleshooting easier


When a problem occurs in your network, every minute counts when searching for its cause, especially if the problem is a critical one. The exact time a problem occurs plays an important role in determining its cause. The question: Did any unusual incidents take place at the time the problem occurred?

Therefore, it is important that local system times are always synchronized with the precise timestamp sent by an NTP server

NTP monitoring with PRTG ensures that time synchronization is up and running. This way, ambiguity regarding the classification of errors based on their occurrence at a certain point in time is eliminated, and administrators are able to find causes and solutions more efficiently.

Working with PRTG will give you peace of mind.


3 statistics collected by PRTG for your NTP monitoring


Response time of the NTP Server

Response time
of the NTP Server

Local system times and precise NTP Server

Local system times and
precise NTP Server

Differences between local times and server time

Differences between
local times and server time


This is what NTP monitoring looks like in PRTG


 i What is a sensor?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)

This is how NTP monitoring with PRTG works

A high-precision-clock, such as a GPS satellite, is the basis of an NTP server’s timestamp.

The NTP Sensor continuously monitors the response time of an NTP server. It also compares the local system times of your network devices with the NTP server’s precise timestamp.


Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.


Advantages of NTP monitoring with PRTG

Identify sources of errors faster

Identify sources of errors faster

Administrators will spend less time racking their brains and painstakingly comparing the times an error occurred. With the NTP Sensor, they can make sure that time synchronization works fine at all times.

Avoid time differences between systems

Avoid time differences between systems

Thanks to NTP monitoring, administrators can react quickly if an NTP server is not responding anymore. Differences between local system times and the NTP server timestamp can therefore be avoided and the underlying causes of a problem determined faster.


PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


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PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

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PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the auto-discovery and pre-configured device templates.

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PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.



Trusted by 500,000 users and recognized
by industry analysts as a leader

“Fantastic network and infrastructure monitoring solution that is easy to deploy and easier still to use. Simply the best available.”

Read more reviews

“Software is absolutely perfect, Support is superior. Meets all needs and requirements, this is a must have solution if you are needing any form of monitoring.”

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“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

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Free Download

Unlimited use of PRTG for 30 days. After 30 days PRTG reverts to the freeware edition.
You can upgrade to a paid license at any time.


Your NTP monitoring at a glance – even on the go

PRTG can be started within minutes and it's compatible with many mobile devices.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.

vendors vm ware


PRTG monitors these vendors and applications, and more, in one view!



quote steve coppin

“I particularly like having breakfast at home and just surveying my domain, and understanding what's working and what isn't.”

Steve Coppin, Oxford University


Paessler teams up with many partners

Partnering with innovative IT vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


IP Fabric

Combining the broad monitoring feature set of PRTG with IP Fabric’s automated network assurance creates a new level of network visibility and reliability.

Read more


Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

Read more


UVexplorer integrates tightly with PRTG to bring fast and accurate network discovery, detailed device inventory, and automatic network mapping to the PRTG platform.

Read more


also of interest

Also interesting:

Website monitoring:
 Is your website always available? Are all its key processes operational? Are its load times increasing? With PRTG, you can monitor the worldwide availability of your website with the HTTP and Cloud HTTP sensors. The same goes for your VPN servers and entire (distributed) IT infrastructure.

Packet Sniffing: The PRTG Packet Sniffer sensor monitors web traffic, mail traffic, file transfer traffic, and much more. Check out our section on packet sniffing to find out how to set up the Packet Sniffer sensor, and to get an idea of the advantages and disadvantages that come with this technology.

VoIP monitoring: PRTG monitors the quality of your VoIP-connections. By preventing malfunctions and verifying service level agreements, you’ll save time and money.


PRTG The Swiss Army knife

PRTG: The Swiss Army knife for sysadmins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • REST Custom Sensor: Monitor almost everything that provides XML or JSON


Still not convinced?



More than 500,000 sysadmins love PRTG

PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.

Still not convinced?


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.




Free Download



Try PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free. Start now with your 30-day trial.




Network Monitoring Software - Version (June 22nd, 2022)


Download for Windows and cloud-based version PRTG Hosted Monitor available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications

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