Best Web-Based IP Scanners of 2025

Site24x7 provides unified cloud monitoring to support IT operations and DevOps within small and large organizations. The solution monitors real users' experiences on websites and apps from both desktop and mobile devices. DevOps teams can monitor and troubleshoot applications and servers, as well as network infrastructure, including private clouds and public clouds, with in-depth monitoring capabilities. Monitoring the end-user experience is done from more 100 locations around the globe and via various wireless carriers.

NetCrunch is a next-gen, agentless infrastructure and traffic network monitoring system designed for hybrid, multi-site, and fast changing infrastructures. It combines real-time observability with alert automation and intelligent escalation to eliminate the overhead and limitations of legacy tools like PRTG or SolarWinds. NetCrunch supports agentless monitoring of thousands of nodes from a single server-covering physical devices, virtual machines, servers, traffic flows, cloud services (AWS, Azure, GCP), SNMP, syslogs, Windows Events, IoT, telemetry, and more. Unlike sensor-based tools, NetCrunch uses node-based licensing and policy-driven configuration to streamline monitoring, reduce costs, and eliminate sensor micromanagement. 670+ built-in monitoring packs apply instantly based on device type, ensuring consistency across the network. NetCrunch delivers real-time, dynamic maps and dashboards that update without manual refreshes, giving users immediate visibility into issues and performance. Its smart alerting engine features root cause correlation, suppression, predictive triggers, and over 40 response actions including scripts, API calls, notifications, and integrations with Jira, Teams, Slack, Amazon SNS, MQTT, PagerDuty, and more. Its powerful REST API makes NetCrunch perfect for flow automation, including integration with asset management, production/IoT/operations monitoring and other IT systems with ease. Whether replacing an aging platform or modernizing enterprise observability, NetCrunch offers full-stack coverage with unmatched flexibility. Fast to deploy, simple to manage, and built to scale-NetCrunch is the smarter, faster, and future-ready monitoring system. Designed for on-prem (including air-gapped), cloud self-hosted or hybrid networks.

OpUtils is an IP address and switch port management tool that engineers can use to efficiently monitor, diagnose and troubleshoot IT resources. OpUtils is a complement to existing management tools, providing real-time monitoring and troubleshooting capabilities. It makes it easy for network engineers to manage their switches and IP addresses. This switch port management tool includes over 20 tools that can be used to monitor network performance, such as monitoring bandwidth usage, monitoring the availability of critical devices, and backing up Cisco configuration files. Advanced IP scanning of IPv4 or IPv6 subnets within your network is possible to identify available and used IP addresses. You can scan all switches in your network, map ports, run port scans, and view details such user, physical location, and more. Block access to rogue devices and identify rogue device intrusions.

Paessler PRTG is an all-inclusive monitoring solution with an intuitive, user-friendly interface powered by a cutting-edge monitoring engine. It optimizes connections and workloads, reduces operational costs, and prevents outages. It also saves time and controls service level agreements (SLAs). This solution includes specialized monitoring features such as flexible alerting, cluster failover, distributed monitoring, maps, dashboards, and in-depth reporting.

As the top choice for automated web application security testing, Acunetix by Invicti stands out as the preferred security solution among Fortune 500 firms. DevSecOps teams can efficiently navigate through complexities to identify hidden risks and address serious vulnerabilities, allowing for comprehensive detection and reporting on various security flaws. Featuring a state-of-the-art crawler that adeptly handles HTML5, JavaScript, and single-page applications, Acunetix facilitates the thorough examination of intricate, authenticated applications, providing a clearer understanding of an organization's risk profile. Its status as a leader in the field is well-deserved, as the technology behind Acunetix is the only one available that can autonomously identify out-of-band vulnerabilities, thus ensuring complete management, prioritization, and oversight of vulnerability threats based on their severity. Additionally, Acunetix is offered in both online and on-premise versions, seamlessly integrating with popular issue trackers and web application firewalls, which allows DevSecOps teams to maintain momentum while developing cutting-edge applications. This unique combination of features not only enhances security but also streamlines the workflow for teams dedicated to keeping their applications secure.

Automatically identify the devices connected to your network using the Spiceworks IP Scanner, which provides essential details such as operating system and MAC address. Additionally, you can obtain comprehensive information regarding the hardware and software of your servers and workstations, including details like CPU specifications, storage capacity, memory availability, installed software, and serial numbers, among other things. This tool allows you to gather the necessary information with very little configuration! The IP Scanner operates as a cloud-based solution that thoroughly scans your local network and generates a sortable list of all detected devices. You have the option to filter, search, and even export the results to a CSV file. While it automatically detects and scans a local subnet, users also have the flexibility to specify a custom IP range if desired. The tool presents a variety of data for each device, including hostname, IP address, vendor information, operating system, MAC address, descriptions, open ports, and the status of the device, whether it is online or offline. The amount and type of data returned will vary based on the specific device being scanned, providing a tailored overview of your network assets. This makes it an invaluable resource for network administrators looking to manage and monitor their environment effectively.

Netlas.io, a network scanner on the Internet, is a search engine. Netlas scans DNS records for billions of domains names, hundreds and millions of HTTP responses, and SSL certificates. This information can be obtained using several tools. This tool allows you to search through the results of internet scans. Netlas scanners are non-intrusive and continuously scan internet-accessible hosts. They save their responses. DNS Search: This stores domain names and their IP addresses as well as other types of DNS records. IP WHOIS: Information on the owner and management a IP address including the IP address range and network provider name. Domain WHOIS: Information on the domain owner, including contact information, details of the registrar, registration dates and expiration dates. Certificates: A database containing SSL certificates from various sources. Netlas is a must-have tool for any cybersecurity professional.

Security firms, researchers, and teams can benefit from a rapid and reliable API that provides both current and historical data. This API operates on a straightforward pricing model, enabling seamless integration of our data into your applications. Everything you need is available, featuring fully-indexed historical and real-time data that is ready for immediate access. Users can explore nearly 3 billion records of WHOIS data and track changes over time. Additionally, our continuously updated database exceeds 203 million entries and is expanding. Discover what technologies various websites are utilizing by searching through thousands of options. Gain monthly access to an extensive collection of over 1 billion passive DNS datasets. Stay informed with the latest insights concerning IPs, domains, and hostnames as they happen. Efficient searching is made easy with well-tagged and indexed information. Dive into a wealth of invaluable cybersecurity resources and acquire insights that are hard to find elsewhere. We take pride in providing security analysts and developers with the most up-to-date DNS and domain intelligence through our robust API, ensuring they have the best tools available for their needs. This comprehensive access empowers users to make informed decisions in an ever-evolving digital landscape.

Leverage the capacity reporting features of IPAM to monitor the usage of subnets and enhance your capacity planning efforts. The customizable subnet capacity template allows for rapid, adaptable, and centralized reporting that meets specific needs. The Subnet Allocation Wizard within IPAM efficiently organizes your IP address space into appropriately sized subnets tailored for your network's requirements. With IPAM’s intuitive drag-and-drop interface, you can establish groups that include any combination of groups, supernets, subnets, and individual IP addresses, while also having the flexibility to add custom fields as needed. Additionally, vRealize Orchestrator (vRO) can be integrated with vRealize Automation (vRA) and vCenter to streamline the management of IP address tasks. You can easily acquire and reserve unique IP addresses, automatically releasing them during the relevant stages of the machine lifecycle. Furthermore, IPAM enables you to identify unused addresses from both static and DHCP configurations—simply utilize its continuously updated logs to pinpoint abandoned addresses for reclamation. This capability not only enhances efficiency but also ensures optimal utilization of your IP address resources.

Intruder, an international cyber security company, helps organisations reduce cyber exposure by providing an easy vulnerability scanning solution. The cloud-based vulnerability scanner from Intruder finds security holes in your digital estate. Intruder protects businesses of all sizes with industry-leading security checks and continuous monitoring.