Re: net mask

["nico de haer" <nicodehaer@yahoo.com>]

Jimmy,

I'd like to point out that it is NOT possible to calculate the netmask. (at
best you can calculate the network class). The problem is that you can't
tell if there is some sub (or super) networking going on. so your only
option is to *ask* the provider. (see ip-subnetworking howto)

regards,
Nico de Haer

----- Original Message -----
From: Jimmy Richards <longshot@c243491-a.aurora1.co.home.com>
To: <debian-user@lists.debian.org>
Sent: Monday, June 25, 2001 10:04 PM
Subject: Re: net mask


On Mon, Jun 25, 2001 at 09:14:49PM +0200, Daniel de los Reyes wrote:
> My provider has assigned me the following ip range
> 213.201.43.208-15
> what net mask should I use?

Hi Daniel,

I used a network calculator to get the following information.
According to it you should use a netmask of 255.255.255.0.



longshot@c243491-a:~$ ipcalc.pl 213.201.43.208

Address:   213.201.43.208        11010101.11001001.00101011 .11010000
Netmask:   255.255.255.0 == 24   11111111.11111111.11111111 .00000000
Wildcard:  0.0.0.255             00000000.00000000.00000000 .11111111
=>
Network:   213.201.43.0/24       11010101.11001001.00101011 .00000000
(Class C)
Broadcast: 213.201.43.255        11010101.11001001.00101011 .11111111
HostMin:   213.201.43.1          11010101.11001001.00101011 .00000001
HostMax:   213.201.43.254        11010101.11001001.00101011 .11111110
Hosts/Net: 254


longshot@c243491-a:~$ ipcalc.pl 213.201.43.215

Address:   213.201.43.215        11010101.11001001.00101011 .11010111
Netmask:   255.255.255.0 == 24   11111111.11111111.11111111 .00000000
Wildcard:  0.0.0.255             00000000.00000000.00000000 .11111111
=>
Network:   213.201.43.0/24       11010101.11001001.00101011 .00000000
(Class C)
Broadcast: 213.201.43.255        11010101.11001001.00101011 .11111111
HostMin:   213.201.43.1          11010101.11001001.00101011 .00000001
HostMax:   213.201.43.254        11010101.11001001.00101011 .11111110


HTH,

Jimmy Richards


> --
> ______________________________
> Daniel de los Reyes
> S2-Desarrollo, Grupo S2
> Valencia Spain
> e-mail: dadecal@s2-selling.com
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