IP Scanner: This is how PRTG helps
you as a network scanner

  • IP Scanner for one-time or regular scans
  • PRTG for network monitoring
  • Sensors monitor IP range
  • Sensors monitor traffic
  • With alarm, dashboards, reporting

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

IP Scanner Tools vs. PRTG

Network scan with IP scanners

Many system administrators want to download an IP scanning tool for a quick check. Possible tools are, for example, Angry IP Scanner or Advanced IP Scanner. With this software, you can scan all devices on your LAN and WLAN. Comparison: Angry IP Scanner is an open-source solution and runs cross-platform on Windows, Linux and Mac OS. Advanced IP Scanner is a proprietary solution.

Network monitoring tool PRTG

With PRTG, you can permanently monitor your network. If there are disruptions or breakdowns, you will receive an alarm and can react quickly. With PRTG, you can monitor your network devices, but also applications and your network traffic – for example, which traffic runs over which IP address. Complete monitoring for your network.

This is what IP address monitoring looks like in PRTG

With PRTG, you know what is happening in your IP range


iWhat 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.)

IP Scanner

IP Scanner

The auto-discovery of PRTG is your IP scanner. Already during installation, our software scans the private IP address area in the subnetwork of PRTG. All devices that are available in the IP address area will be updated in the first monitoring. Later, you can start the automatic search in other subnetworks as well. This way, you can see at a glance which hardware is available in your LAN.

IP Sensor

IP Sensor

With the Ping sensor, you can check the reachability of all devices. With the ping test, you can see whether a device is reachable within your IP network. If a device behind an IP address is no longer reachable, you will receive a notification early on in case of disruptions. More about ping monitoring with PRTG.

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

IP Sniffer

IP Sniffer

With the Packet Sniffer sensor from PRTG, you can filter your traffic by IP addresses, servers, computers, laptops or printers, among others. This way, you can see which applications and IP addresses are responsible for the data traffic in your network. More about packet sniffing.

IP Traffic

IP Traffic

PRTG offers numerous pre-configured SNMP sensors, for example for various manufacturers such as Cisco, Dell or HP. The SNMP Traffic sensor monitors, among other, how traffic flows through your IT system. More about SNMP monitoring.

Try it – with no risks

Try it – with no risks

100 sensors and the alarm are perpetually free. In addition, you can test all functions for 30 days. Non-binding and without any risks.

Three situations in which IP scan tools are used

You are new at a job

You are new at a job

You come as an administrator to a new company and immediately notice: chaos rules here. So you need a quick overview of your network. With an IP scanner or network scanner, you can quickly see which and how many devices are available in the network. Then you can start your planning.  

Your company is moving

Your company is moving

Many companies grow. This is also the case with Paessler AG. When moving, our administrators used the Angry IP Scanner, among other, to check which devices are already reachable in the network and how they are connected with one another via routers and switches. This way, our admin team was able to set up the network piece by piece.

You want to increase security

You want to increase security

System administrators have to protect their LAN from attacks. One possible point of attack are open ports. Another weakness are private devices connected to LAN or WLAN without agreement. An IP scan helps here too. In addition, monitoring makes a lot of sense for long-term knowledge.  

Network scanner overview: Pros of PRTG


Top Dashboads

Top Dashboads

With Sunburst and other dashboards of PRTG you always have everything at a glance. Always on your desktop computer. And you have access on the go via the app on the smartphone or tablet. You can customize the dashboards to your network and your priorities. 

Top Service

Top Service

Sensors, alarm, reporting – with PRTG you have no additional costs. A license and everything with it. And if you have any questions: our support is usually available to help you 24 hours a day on working days. Our knowledge base contains answers to thousands of questions.

Top Performance

Top Performance

PRTG pays off – really. IT team that use our network software report that they save time, costs, and avoid hassle – and permanently increase reliability. Read here about how to calculate the ROI for your company.

What our customers say

“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

200,000 system administrators worldwide
trust our software. Every day.

We have compiled some reviews for you.


  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

Hey Gerald, what tip would you have an administrator in search of a network scanner, who is considering trying PRTG?

“An IP scanner or network scanner provides a first overview. With PRTG, you are always on top of things and get additional in-depth details. The ping sensor and the SNMP traffic sensor show anytime whether the network is okay. With the packet sniffing sensor and the NetFlow sensors you can see more precisely what is happening in the network.”

Gerald Schoch works as a technical editor at PAESSLER AG.

This way, you have your network always 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.


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


Frequent questions about the IP scanner


What is an IP scan or network scan?

When you perform an IP scan, you can see the devices in your LAN and the network participants within an IP area. There are various tools for an IP scan that use different techniques.

What cheap IP scanners are there?

There are many IP scanners online, both freeware and paid software. But the price is just one criterion when making a comparison. The size and operating systems of your network are decisive. Another point is your needs as to how deep and detailed the network scan should be. Another criterion for many is whether the IP scanner is open-source or a commercial one.

Can I discover unknown, hidden devices with it?

Many system administrators run an IP scan to discover hidden devices, i.e. devices that are not officially part of the network. Shadow IT can be a risk factor, for example in network attacks. 

Can I also scan my home network with it?

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 the free license with 100 sensors, as an example.

PRTG is worth it: You’ll optimize your entire IT!

The costs for a one-year PRTG license usually pay for themselves within a few weeks.

PRTG improves the reliability of your network

PRTG improves the reliability of your network

PRTG saves network management costs

PRTG saves network management costs

PRTG saves time spent on network management

PRTG saves time spent on network management

Award winning solution

We work hard on making our software as powerful and easy-to-use
as possible for our customers each and every day.
Of course it makes us proud when we get awards for that.




You can scan and monitor this with your PRTG

Port Scan

Which ports are open and which are closed? How much network traffic runs via which ports of routers, switches, hubs and bridges? You can answer these questions with a port scan and port monitoring. With PRTG as a port scanner, you can permanently monitor which traffic flows via your ports.

Server Monitoring

The servers are the crux of any IT infrastructure. Monitor your e-mail server, database server, web server and virtual environments. This includes the CPU, RAM and memory. More about server monitoring.

Network Scanner

Whether during a LAN inventory, network upgrade or calculation of your network costs: The basis is always a network scan. Find out here how you can use PRTG as a network scanner.

Remote Monitoring

Do you want to monitor your network remotely? With PRTG, you can set up remote probes and thus monitor your decentralized network. However, with PRTG, you cannot access your computer remotely, as with radmin.

ping test

You want to know your ping time?

Then try our FREE ping test and we show you how to fix high ping times e.g. of your website by reducing number of HTTP requests, adding Expires or Cache-Control Header, and utilizing a CDN to reduce latency.

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

PRTG: The swiss army knife for sys admins

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
  • New REST API Sensor: Monitor almost everything that provides XML or JSON

Over 95% of our customers recommend PRTG


Paessler AG worldwide trialled PRTG in over 600 IT departments.
The aim was to tune the network monitoring software closer to the needs of the administrators.
The result of the survey: over 95% of the participants would recommend PRTG - or already had.

Recommend PRTG

German quality engineering




Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

Most administrators want to test a tool for free before deciding to make an investment.

The many advantages of PRTG:

1. Free trial version: Take the time to explore PRTG so you can determine if it satisfies your needs and meets your expectations. Once the trial is over, it’s easy to upgrade your already configured version of PRTG, which means you’re much less likely to make an incorrect purchase.

2. One tool, one overview: Administrators often use a variety of monitoring solutions for their network or for the individual components of their infrastructure. But using several different tools every time you want to create an overview costs time and energy. PRTG is an “all-in-one” solution. Our dashboard and app provide a comprehensive overview, whenever you want it.

3. Quick customer support: Got a question? Stuck on a problem and need a hand? PRTG is backed by a dedicated development and support team. We do our utmost to answer every customer inquiry within 24 hours (on business days). Browse all our support topics here.

Configure your PRTG today. The trial version is free of charge. Save time, worry, and money with our monitoring tool designed for your network and entire infrastructure.



Network Monitoring Software - Version (November 25th, 2019)


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

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