Is it ok to use Class C address space with Class B cidr?

[dandog2500]

Question for you all, I have a busy guest wifi network 192.168.172.0/24. It constantly runs out of available IP space [DHCP set to 30 minutes]. Question is, can I change my cidr to make my guest network a little bigger? Such as a 192.168.172.0/22 ? What I'm currently using for the network and subnet is all class C, but if I change my subnet to /22 [class B] can I keep the current class C ip scheme? I dont think it would matter [besides it being sacrilegious to some], but I wanted to check.

Thanks!

 

[kanewolf]

It will depend on the hardware you have. Home hardware generally is class C only. Business class hardware is more flexible.

 

[dandog2500]

It will depend on the hardware you have. Home hardware generally is class C only. Business class hardware is more flexible.

Cisco Meraki gear

 

[bill001g]

It is a matter of try keying it in. Some consumer routers refuse to accept any mask other than 255.255.255.0

 

[failboat]

CIDR 192.168.0.0/16 is the full 192.168.0.0-192.168.255.255 private range. anything at or above 16 is fine ip wise. Not that you should go below 22 or what ever your equipment supports.

https://www.ipaddressguide.com/cidr