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x.y.z.0 ip address

hs08
Spotlight
Spotlight

Hello,

If i have subnet 10.10.10.0/23 this mean :

  • Network Addr is 10.10.10.0
  • Broadcast Addr is 10.10.11.255
  • Usable IP range from 10.10.10.1 - 10.10.11.254

My question is IP 10.10.11.0 is valid address?

1 Accepted Solution

Accepted Solutions

since 10.10.11.0 is not network and not broadcast of 10.10.10.0/23 then you can use it 
MHM

Screenshot (756).png

View solution in original post

6 Replies 6

since 10.10.11.0 is not network and not broadcast of 10.10.10.0/23 then you can use it 
MHM

Screenshot (756).png

Thanks for your confirmation. But are you ever use .0 as host ip address?

sure the mask /23 allow you to use .0

MHM

Leo Laohoo
Hall of Fame
Hall of Fame

Command:  ip subnet-zero


@hs08 wrote:

Hello,

If i have subnet 10.10.10.0/23 this mean :

  • Network Addr is 10.10.10.0
  • Broadcast Addr is 10.10.11.255
  • Usable IP range from 10.10.10.1 - 10.10.11.254

My question is IP 10.10.11.0 is valid address?


yes....


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Joseph W. Doherty
Hall of Fame
Hall of Fame

"My question is IP 10.10.11.0 is valid address?"

As 10.10.11.0/23, as others have already noted, yes it is a valid "normal" IP address.

To be clear, it's easy to believe x.x.x.0 is "special", because of historic class C network address block allocations, but the real issue is the first IP within a network is also used as network address, which is confusing, but actually doesn't preclude using an IP like 10.10.11.0/24 as a host IP, but also historically, sometimes the first network IP was used as a network broadcast IP.  So, we generally exclude using the first network block IP, the network address, except in the case of using a /31 or /32.

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