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teemIP : Open source IPAM & DDI solution with CMDB integration.
teemIP is an open source, web-based IP Address Management (IPAM) and DDI solution built on the iTop framework. It provides comprehensive IP management: IPv4/IPv6 plan management, subnet hierarchy, IP lifecycle, VLAN and DNS/DHCP integration.
teemIP is now maintained by the teemIP SAS founding team:
Christophe Naud (original creator), Martin de Laval and Quentin Ville. The company is being officially incorporated in July 2026.
The project remains open source under AGPL...
An automated, Web based IP address management (IPAM) software. It features powerful search and filter functions for both networks and host, as well as many tools (e.g. a subnet calculator) helping Administrators to plan and handle complex IP networks
The network calculator with many tools for IPv4,IPv6
NetCalcTools 1.5 uses Qt 5 libraries
NetCalcTools 1.4 uses Qt 4 libraries
IPv4 tools:
SUBNET CALC - Calculate subnet,broadcast,host range and so on.
ADDRESS CONVERTER - Input IP'll be converted to bin,hex,oct.
MULTICAST ETHERNET - Calculation Multicast MAC addresses from Multicast IP addresses ...
SUMMARIZATION - Summarization of IP addresses , You'll fill up IP list and program will summarize it. ...
IPv6SubnetCalc is a comprehensive calculator for IPv6 addresses. It comes with Java Swing GUI and supports the following RFCs: RFC4291, RFC4193, RFC3849, RFC2464, RFC5375, RFC4941, RFC3513, RFC3879, RFC4941, RFC3056, RFC3587, RFC2374, RFC3306, RFC3956.
This is a PHP driven web application which accepts user input of an IP address and a subnet mask, and then returns the network address, broadcast address and range of usable IP addresses based on the input.
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The Internet Protocol Address Calculator is an open-source java-based tool. This calculator will assist network administrators to perform calculations over both IPv4 and IPv6 address space. A handy whois search client is also integrated into this tool.
A web browser based calculator written in HTML and JavaScript that will calculate the Variable Length Subnet Masking for your network. Simply enter your CIDR block address/mask and the number of addresses you need in each network, and it does the rest.