# network guru's **URL:** \ **Category:** PittSpeed Off Topic\ **Created:** [July 16, 2009, 8:51am UTC](https://forums.speedlife.net/t/network-gurus/203201 "2009-07-16T08:51:08Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![MONTE\_SS](https://avatars.discourse-cdn.com/v4/letter/m/8797f3/32.png) [@MONTE\_SS](https://forums.speedlife.net/u/MONTE_SS)\ **Post date:** [July 16, 2009, 8:51am UTC](https://forums.speedlife.net/t/network-gurus/203201/1 "2009-07-16T08:51:08Z")
determining a subnet mask limitation on hosts What is the max number of hosts in a /19 subnet. my answer was (2^14-2) which is 16382 book says its 8190??? ---
**Author:** ![fshowcars](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fshowcars/32/5937_2.png) [@fshowcars](https://forums.speedlife.net/u/fshowcars)\ **Post date:** [July 16, 2009, 9:29am UTC](https://forums.speedlife.net/t/network-gurus/203201/2 "2009-07-16T09:29:22Z")
16382 is a /18 /19 is in fact 8190, it’s 255.255.224.0 … edit: your math is only off by one, 13 instead of 14, it’s 2^(19-32)-2 which is 8190 btw i am NOT a network guru, but figured i could help 🙂 ---
**Author:** ![77rednecktruck](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/77rednecktruck/32/5966_2.png) [@77rednecktruck](https://forums.speedlife.net/u/77rednecktruck)\ **Post date:** [July 16, 2009, 11:33am UTC](https://forums.speedlife.net/t/network-gurus/203201/3 "2009-07-16T11:33:41Z")
I hate figuring out subnet mask shit I use this webpage when I want to figure it out. [http://www.aboutmyip.com/AboutMyXApp/SubnetCalculator.jsp?ipAddress=192.168.0.1&cidr=19](http://www.aboutmyip.com/AboutMyXApp/SubnetCalculator.jsp?ipAddress=192.168.0.1&cidr=19)