Ipcalc

https://www.calculator.net/ip-subnet-calculator.htm
IPv6 Subnet Calculator A subnet is a division of an IP network internet protocol suite where an IP network is a set of communications protocols used on the Internet and other similar networks It is commonly known as TCP IP Transmission Control Protocol Internet Protocol The act of dividing a network into at least two separate networks

https://www.subnet-calculator.com
The IP Subnet Mask Calculator enables subnet network calculations using network class IP address subnet mask subnet bits mask bits maximum required IP subnets and maximum required hosts per subnet Results of the subnet calculation provide the hexadecimal IP address the wildcard mask for use with ACL Access Control Lists subnet ID

https://ipcalculator.com
By entering an IP address and its corresponding netmask above our tool will tell you what type of IP address it is its broadcast address the range of addresses it encompasses its class and more It will also give you the binary numbers for these addresses which could save you a ton of time translating

https://ipcalc.info
IPcalc is a lite online utility for IP address calculations including netmask broadcast and network addresses as well as Cisco wildcard mask A tool for calculating network information from and IP address and subnet Takes IP and subnet input eg 192 168 0 1 24 and returns more information and binary conversions

http://jodies.de/ipcalc?host=192.168.0.1&mask1=28&mask2=
Screenshot ipcalc works also at the prompt CGI wrapper that produced this page Archive Have a look in the archives for the new version 0 41 with the capability to deaggregate network ranges How to run this under windows Debian users can apt get install ipcalc 2000 2022 Krischan Jodies ipcalc202105 a jodies de

http://www.ip-tools.net/ipcalc
Fast IP Subnet Calculator that takes all main formats for IP addresses and subnet masks It also shows the results as bindary Input IP address and netmask Result is calculated as you type Input formats netmask bitmask eg 10 9 8 7 25 or 10 9 8 7 255 255 255 255 address 52 167 144 238 00110100 10100111 10010000 11101110

https://www.solarwinds.com/free-tools/advanced-subnet-calculator
Start simply with inserting an IPv4 IP address in the online subnet calculator and specify its network mask Mask bits in CIDR notation Then based on your requirements specify subnet size by choosing subnet mask number of subnet bits and number of subnets you re looking for Based on these parameters subnet calculator will immediately

https://www.howtogeek.com/823503/find-subnet-masks-on-linux-ipcalc
The ipcalc Command The ipcalc makes it easy to work out what the subnet masks and IP addresses need to be to correctly subnet your network ipcalc was already installed on Fedora 36 We had to install it on Ubuntu 22 04 and Manjaro 21 The command for Ubuntu is sudo apt install ipcalc

http://ipuptime.net/ipCalc.aspx
IP Address Network ID Address Class Broadcast ID Subnet Mask First Host Wildcard Mask Last Host Host Bits Block Size Related IPv6 Info IPv4 Compatible Address IPv4 Mapped Address 6to4 Address