Tuesday, February 15, 2011

Advanced IP subnet calculator sipcalc

      Sipcalc is an advanced console-based IP subnet calculator. It can take multiple forms of input (IPv4/IPv6/interface/hostname) and output a multitude of information about a given subnet.
 On ubuntu,  you can install it from  software center or from the command line.

If you want to calculate the netmask details of 123.123.123.123/28, here we go

$  sipcalc 123.123.123.123/28
-[ipv4 : 123.123.123.123/28] - 0

[CIDR]
Host address        - 123.123.123.123
Host address (decimal)    - 2071690107
Host address (hex)    - 7B7B7B7B
Network address        - 123.123.123.112
Network mask        - 255.255.255.240
Network mask (bits)    - 28
Network mask (hex)    - FFFFFFF0
Broadcast address    - 123.123.123.127
Cisco wildcard        - 0.0.0.15
Addresses in network    - 16
Network range        - 123.123.123.112 - 123.123.123.127
Usable range        - 123.123.123.113 - 123.123.123.126

Any net admin would love this gem.

You can use it on your existing interfaces too.
Here is the sample ipcalc output from my wlan interface

  # sipcalc -d -bcix -n 4 -e -r -t  wlan0


 [Classfull]
Host address        - 192.168.1.2
Host address (decimal)    - 3232235778
Host address (hex)    - C0A80102
Network address        - 192.168.1.0
Network class        - C
Network mask        - 255.255.255.0
Network mask (hex)    - FFFFFF00
Broadcast address    - 192.168.1.255

[CIDR]
Host address        - 192.168.1.2
Host address (decimal)    - 3232235778
Host address (hex)    - C0A80102
Network address        - 192.168.1.0
Network mask        - 255.255.255.0
Network mask (bits)    - 24
Network mask (hex)    - FFFFFF00
Broadcast address    - 192.168.1.255
Cisco wildcard        - 0.0.0.255
Addresses in network    - 256
Network range        - 192.168.1.0 - 192.168.1.255
Usable range        - 192.168.1.1 - 192.168.1.254
[Classfull bitmaps]
Network address        - 11000000.10101000.00000001.00000000
Network mask        - 11111111.11111111.11111111.00000000

[CIDR bitmaps]
Host address             - 11000000.10101000.00000001.00000010
Network address        - 11000000.10101000.00000001.00000000
Network mask              - 11111111.11111111.11111111.00000000
Broadcast address    - 11000000.10101000.00000001.11111111
Cisco wildcard        - 00000000.00000000.00000000.11111111
Network range        - 11000000.10101000.00000001.00000000 -
                                  11000000.10101000.00000001.11111111
Usable range        - 11000000.10101000.00000001.00000001 -
                                11000000.10101000.00000001.11111110

[Networks]
Network            - 192.168.1.0     - 192.168.1.255 (current)
Network            - 192.168.2.0     - 192.168.2.255
Network            - 192.168.3.0     - 192.168.3.255
Network            - 192.168.4.0     - 192.168.4.255






6 comments:

Bob Robertson said...

Can you put up an IPv6 example?

Martijn said...

$ sipcalc 2001::/8
-[ipv6 : 2001::/8] - 0

[IPV6 INFO]
Expanded Address - 2001:0000:0000:0000:0000:0000:0000:0000
Compressed address - 2001::
Subnet prefix (masked) - 2000:0:0:0:0:0:0:0/8
Address ID (masked) - 1:0:0:0:0:0:0:0/8
Prefix address - ff00:0:0:0:0:0:0:0
Prefix length - 8
Address type - Aggregatable Global Unicast Addresses
Network range - 2000:0000:0000:0000:0000:0000:0000:0000 -
20ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

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sia rey said...

Thanks for giving such an important post on subnet calculator. Your post is more beneficial for IT Professionals to calculate netmask and IP Address.

sia rey said...

Thanks for giving such an important post about cidr calculator. The concept explanation with diagram is very wonderful and easy for the students to understand the concept of cidr calculator.

sia rey said...

I read your post on subnet calculator. Your post is very important to the students for understanding the concept of subnet calculator.

sia rey said...

CIDR is the short for Classless Inter-Domain Routing, an IP addressing scheme that replaces the older system based on classes A, B, and C. A single IP address can be used to designate many unique IP addresses with CIDR. A CIDR IP address looks like a normal IP address except that it ends with a slash followed by a number, called the IP network prefix. CIDR addresses reduce the size of routing tables and make more IP addresses available within organizations. You can create a random IP address which can then be calculated by using netmask calculator.