Paessler PRTG

All-in-one IP scanner

Comprehensive network scanner & monitoring tool


  • Easy IP scanner for one-time or regular scans
  • Real-time alerts, dashboards & reporting
  • Monitor IP range & traffic per IP address
  • Get a holistic overview of your IT infrastructure

Our users give top ratings for monitoring with Paessler PRTG




Our IP scanner saves you time and money

Start scanning your IP addresses with PRTG and see how it can make your IT infrastructure more reliable and your job easier.



Know what's happening in your
IP address range with PRTG


IP scanner

Paessler PRTG comes with a comprehensive auto-discovery feature that scans the private IP address range in the subnet of your PRTG server during installation. All devices that are available in this IP range are automatically added to your monitoring setup. Later, you can start the automatic search in other subnetworks as well.

With the IP scanner PRTG, you can see at a glance which devices are available in your LAN and start monitoring them right away.

IP sensors

Use the PRTG Ping v2 sensor to ping the IP address of a device and see if it is reachable over your network. In case a device cannot be reached and is not available any longer, PRTG immediately displays an error message and sends a notification to your IT team so you can react quickly.

With PRTG, you can work with peace of mind knowing that if there is no alert, all your systems are running smoothly. More about ping monitoring

IP sniffer

Monitor the headers of data packets that pass a local network card with the Packet Sniffer sensor and filter them for IP addresses to identify the top talkers in your network. 

With the PRTG IP sniffer, you can always see which devices are responsible for the header traffic in your network. More about packet sniffing

IP traffic

You get numerous pre-configured SNMP sensors in PRTG, including ones for manufacturers such as Cisco, Dell, or HPE. To monitor traffic that flows through your network, use the SNMP Traffic sensor and check if there is high traffic that originates from specific IP addresses.

With IP traffic monitoring in PRTG, you can identify top talkers in your network. More about network traffic analysis


  How PRTG defines sensors

In PRTG, sensors are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example 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



IT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring


“All-around winning
network monitor”

logo it brief

“The real beauty of PRTG is the endless possibilities it offers”


“PRTG Network Monitor
is very hard to beat”


Our IP scanner saves you time and money


  • icon check white 2
    IP scanner for one-time or regular scans

  • icon check white 2
    Monitor hardware status, availability, and more

  • icon check white 2
    Sensors keep an eye on your IP address range

  • icon check white 2
    Customizable alerts, dahsboards & reporting

  • icon check white 2
    Overview of your entire IT infrastructure


PRTG is compatible with all major vendors & manufacturers


vendors applications blue


















The PRTG advantage: IP scanner & network monitor in one solution


Other IP scanners:
Basic network scan

Some system administrators settle for a separate IP scanning tool for a quick check of their network, such as Angry IP Scanner or Advanced IP Scanner.

However, while such IP scanners let you scan devices on your LAN, they are limited in how they can be used and do not offer the functionalities of PRTG.

PRTG: IP scanner &
network monitor all in one

PRTG does not only offer IP network scanning but comprehensively monitors your entire IT infrastructure as well. If there are disruptions or even system failures, you are immediately notified via customizable real-time alerts so that you can troubleshoot the issue as quickly as possible.

Monitor your servers, applications, bandwidth, data traffic – for example, which traffic runs over which IP address – and much more.


The benefits of PRTG network scanning


Top dashboards 

  • Visualize everything at a glance
  • Get access on multiple platforms
  • Custom dashboards on-the-go

Top service

  • Video tutorials & webinars
  • Support available 24 hours a day
  • Extensive Knowledge Base

Top performance

  • Save time and costs
  • Benefit from a high ROI
  • Permanently increase reliability

Visualize your data in real time with the IP scanning tool PRTG

Diagnose network issues by continuously monitoring all your servers and hosts. Show server status in real time and visualize data in graphic maps & dashboards to more easily identify problems. Gain the visibility you need to troubleshoot server issues and prevent downtime.



Your IP address scanner at a glance – even on the go

Set up PRTG in minutes and use it on almost any mobile device.


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



PRTG monitors these vendors and applications in one view!


vendors vm ware



Prevent network issues with our IP scanner

PRTG saves you time and money by helping you prevent network issues before they become critical.



Manual vs. automatic IP scanning


Manual one-time ping command

  • The Ping command is a helpful problem-solving tool
  • Ping any IP address using the command line and the command "ping IP ADDRESS"
  • Use the ping command to check if a target device is available


  • Has to be done manually
  • Has to be done individually for each device

PRTG: Automatic IP scanning solution

  • Keep a constant eye on your entire network
  • Ping the IP addresses of all your network devices automatically
  • Benefit from the auto-discovery feature of PRTG that scans your network and automatically creates an initial monitoring setup
  • Visualize your IP monitoring data in customizable dashboards
  • Receive real-time alerts in case of an issue, for example, if a device is down and not reachable anymore

ping test

Free ping test: want to know about your ping time?

Try our free ping test and see how to fix high ping times, for example of your website, by reducing the number of HTTP request, adding Expires or Cache-Control Header, and utilizing a CDN to reduce latency.

We’ll show your ping time from 5 locations and help you improve it.



Remote network scanning & monitoring


PRTG meets the demands of distributed networks

Many system administrators are in charge of remote networks. These networks can be distributed across several buildings as well as entire cities, regions, and countries.

IT managers need a tool that offers centralized network scanning as well as remote network monitoring so they can be notified if a problem occurs at a specific location.

PRTG is such a remote network scanning tool.

Setting up remote probes in PRTG for distributed monitoring

PRTG comes with different types of probes:

  • The local probe is automatically set up on your local server when you install PRTG Network Monitor.
  • The hosted probe corresponds to the local probe when you use PRTG Hosted Monitor.
  • Remote probes need to be installed in distributed networks to access, scan, and integrate these networks into the centralized monitoring of PRTG.

All data that remote probes send to the local probe or the hosted probe is secured with SSL/TLS. What's more: It only takes one click to set up a remote probe.


Other ways to scan & monitor your network with PRTG

Port scanner

Which ports are open or closed? 
How much network traffic runs via which ports of routers, switches, and other devices? With PRTG as a port scanner, you can benefit from comprehensive port monitoring round the clock.

Server monitoring

Servers are the backbone of any IT infrastructure. Monitor aspects like the hardware health, CPU, or memory of your mail servers, database servers, web servers, virtual servers, and many more with PRTG server monitoring.

Network scanner

Whether during a LAN inventory, a network upgrade, or the calculation of your network costs – always use a network scan with PRTG as the basis for a complete overview of your IT infrastructure.

Remote monitoring

Do you want to monitor your network remotely? With PRTG, you can set up remote probes to monitor your distributed networks and collect all monitoring data in a central overview.

Security monitoring

PRTG helps you to improve network security by identifying weak spots and loopholes. In case there is any unusual activity in your infrastructure, you are immediately alerted and can check if there is a security incident. 


Reduce costs with PRTG IP scanner

PRTG saves you time and money by helping you prevent network issues before they become critical.


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

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

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


3 use cases for IP scan tools


You have a new job as a sysadmin

  • Get a quick overview of your entire IT infrastructure
  • Establish a network inventory for better planning of hardware resources
  • Instantly monitor all available network devices

Your company is moving

  • Check reachable network devices at a new location
  • Check how devices are connected with each other via routers and switches
  • Quickly set up the new network structure

You want to increase security

  • Protect your LAN from cyber attacks
  • Monitor open ports and other potential weak spots
  • Detect private devices connected to the LAN without prior agreement

gerald schoch

Practical tip: “Hey Gerald, what would you tell administrators looking to use PRTG as a NetFlow Analyzer?”

“Cisco has continuously developed the NetFlow technology. Administrators must therefore find out beforehand which NetFlow version is supported by their routers and switches. With the right PRTG sensors, setting up NetFlow monitoring is quick and easy.”

Gerald Schoch, release manager at Paessler AG


Start IP scanning with PRTG and see how it can make your network more reliable and your job easier.



Create innovative solutions with Paessler’s partners

Partnering with innovative 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


Paessler and Plixer provide a complete solution adding flow and metadata analysis to a powerful network monitoring tool.

Read more


With ScriptRunner, Paessler integrates a powerful event automation platform into PRTG Network Monitor.

Read more


PRTG makes your job easier

Our monitoring software frees you to focus on other tasks by promptly notifying you of potential issues.


time white

Save effort

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

brain white

Save time

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

money white

Save money

80% of our customers report substantial cost savings with network monitoring. Your costs of licenses will likely pay for themselves within weeks.



We asked: would you recommend PRTG?
Over 95% of our customers say yes!


Paessler AG conducted trials in over 600 IT departments worldwide to tune its network monitoring software closer to the needs of sysadmins.
The result of the survey: over 95% of the participants would recommend PRTG – or already have.


Recommend PRTG


Reduce hassle with the IP scanner PRTG

PRTG provides numerous visualization options and instant alerting, allowing you to streamline workflows and optimize performance.


quote case study total uptime 2

“First, PRTG gives us the insight we need, telling us what is happening across our global network at any given moment. Second, the improved insight has increased our availability.“

Jonathan Hoppe, Co-Founder of Total Uptime // Read case study


FAQ: IP scanning

Find answers to some of the most common IP scanning & monitoring questions below.



1. What is an IP address?

An IP address (internet protocol address) is a numerical representation that uniquely identifies a specific interface on the network. IP addresses are binary numbers that are typically expressed in decimal form (IPv4) or hexadecimal form (IPv6) to make reading and using them easier for human beings.

2. What is an IP scan or network scan?

When you perform an IP address scan, you can see the devices that are available in your LAN within a specific IP address range. There are various tools for IP scans that use different scanning techniques.

3. What free IP scanners are there?

There are many IP scanners available online that come as both freeware and paid software alike. When you compare different IP scanning tools, you should consider the following aspects:

  • If you want an open-source or a commercial solution
  • The pricing for commercial solutions
  • The size of your network and the operating systems you use
  • How deep and detailed your network scan should be
  • The feature set that is offered in addition the IP scan

4. Can I discover unknown or hidden devices with an IP scanner?

Yes, you can. Many system administrators run an IP address scan to discover hidden devices, that is, devices which are not officially part of the network. Shadow IT can be a huge risk factor with regards to network security, as unknown devices can be used as the basis for a network attack.

5. Can I also use an IP scanner to scan my home network?

For home networks, we recommend basic open-source IP scanners, as PRTG is designed for companies. It is too powerful and often too complex for a private network at home. However, if you have the necessary skills, you can use our freeware edition that includes 100 PRTG sensors for monitoring your network at home.

6. What's a subnet and can I monitor it with PRTG?

Subnets are independent networks within an IP network. They use subnet masks to merge several successive IP addresses. A standard (RFC 950) is used to classify IP networks and subnets.

Upon installing PRTG, the software automatically performs a network scan of the subnet in which the PRTG server is located. Later, you can also perform this scan on other subnets in your LAN or in remote networks.

7. Which network scanner is best for my operating system?

PRTG itself runs on Windows or you use our cloud-based PRTG product. However, as a cross-platform network monitoring tool, PRTG of course monitors Linux and macOS systems as well. 

On the Internet, you’ll also find free IP scanners such as Nmap, which was originally developed for Linux.

8. What is a sensor in PRTG?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example the traffic of a switch port, the CPU load of a server, or the free space on a disk drive.

On average, you need about 5-10 sensors per device or one sensor per switch port.


Still not convinced?




More than 500,000
sysadmins love PRTG

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


Monitor your entire IT infrastructure

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


Try Paessler PRTG
for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free.


Paessler PRTG

Start IP scanning with PRTG and see how it can make your network more reliable and your job easier. 




Network Monitoring Software - Version (June 13th, 2024)


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

cisco logo grey 40 dell logo grey 40 hp logo grey 40 ibm grey40 netapp grey40 linux grey40 aws grey40 windows grey40 vmware grey40 citrix grey40 exchange grey40 apache grey40 oracle grey40