This question is more a question of definition then a technical one:

You have some network with the network identifier and a subnet mask (/29)

We know that the usable address range is

If I say e.g., do I mean the whole subnet or the specific IP address with a subnet mask

Is "IP Address" the correct term for the combination (IP with CIDR)? What is the most compact way to express this construct?

1 Answer 1


I’d say it depends on the context of the conversation.

If someone asks you what the IP address of a host is and what the mask is, and you respond with, that answers both of their questions at the same time.

If someone asks you what the subnet is, and you say, you’d be misspeaking but the /29 would still answer their question if they know how subnet calculations work and correct it to

If someone only wants to know the host IP address, you would instead say or

There’s really no purpose to telling someone a mask or CIDR notation if they only need the host IP address since the size of the network the host is a member of is irrelevant.

So, I’d say only state the CIDR notation in cases where the size of the network is relevant, and you’d say it like “the network is ‘blah’, and the CIDR notation is ‘blah’.”, or numerically like you said above ( Some people do just call it “the CIDR” or “CIDR mask”. I don’t know that there is a technically correct name, honestly. Even calling it “CIDR notation” is not official - it’s just what it’s commonly called.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.