That is a very big range.
The next usable IP address if I only consider the first network address i.e. 172.20.0.0 and using a default subnet mask i.e one for a class B address, it should be anything between 172.20.0.1 - 172.20.31.254.
Now you have not mentioned what the subnet mask is. So I assumed it to be 255.255.0.0. I also noticed that 172.20.x.x remained constant, making me believe that it should be part of the network address.
You can have 65536 subnets, and 65534 host IDs if you keep the same subnet mask.
Picking pebbles on the shore of the networking ocean
Can someone please tell me the next usable ip address in this address range: 172.20.0.1 - 172.20.31.254?
There is a fundamental problem with the way you worded your question.
You asked for:
"The nextusable ip address in this range"
- Unfortunately this implies you gave us
"The lastusable ip address in this range"
(which you did not)
Based on your wording we are looking for a
USEABLE IP ADDRESS
IN THIS RANGE
Unfortunately there is only one range that can be called "THIS"(172.20.0.1 - 172.20.31.254) and there was no LASTUSEABLE IP ADDRESS defined.
The basic problem with the wording you gave is that the answer you gave has to satisfy three conditions for an ip address:
It has to be in the 172.20.0.1 - 172.20.31.254 range
It has to be "usable"
It has to be "The NEXT"
Within those three conditions the first condition is given. All ip addresses within that range are usable so the second condition is satisfied by the entire range. The third condition however is not possible to satisfy because not enough information was given.
On the other hand if you were looking for the first usable address in the next range that would be 172.20.32.1
I'm not sure that helped you at all try examining your question and re-wording it and I'll see if I can help.
A word of caution however I only point this out because word modifiers are KEY in knowing which information a question is asking for. Many times subnetting questions are modified by constraints such as:
Least hosts per subnet
Most hosts per subnet
Zero Subnet allowed
Zero Subnet Disallowed
Guys, sorry for the improper wording of the question I posted not too long ago,
"Can someone please tell me the next usable ip address in this address range: 172.20.0.1 - 172.20.31.254?"
I left out a few important points and elements from the question.
I had a subnetting lab problem that I was trying to solve where I had to provide 8000 host addresses from the network 172.20.0.0/16. And as you all know, 8000 host addresses will be taken from the third octet with subnet mask of 255.255.224.0 or /19 (172.20.0.0/19) where the total number of host addresses is 8192 and the # of usable host is 8190: