Subnetting Lower half of an Address

Unanswered Question
Aug 5th, 2007
User Badges:

Hi All,

Could someone be kind to help me with the Lower half subnet address of

Urgent assistance shall be appreciated,



  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
mohammedmahmoud Sun, 08/05/2007 - 11:09
User Badges:
  • Green, 3000 points or more


If i understand your question right then the lower half subnet is from to (0 and 127 are omitted as the subnet ID and the subnet broadcast address), or in another format


Mohammed Mahmoud.

Pavel Bykov Sun, 08/05/2007 - 11:51
User Badges:
  • Silver, 250 points or more

or if you want to know what the address is in host/mask notation, than it is:




Mask in host/network notation:


(network is Address bits, where mask bits are ones)

Pavel Bykov Sun, 08/05/2007 - 11:59
User Badges:
  • Silver, 250 points or more

Or if you do want to plan subnetting like Mohammed suggested, then it all depends as to how big of a network you need. If you want point to point link with just two addresses, then you can use 30 bit mask, like so:

Where is network, and are usable addresses and is broadcast.


This Discussion