BSIG: IP Network Classifier

128
64
32
16
8
4
2
1
Octet 1

Decimal:

Binary:

Hex:
Octet 2

Decimal:

Binary:

Hex:
Octet 3

Decimal:

Binary:

Hex:
Octet 4

Decimal:

Binary:

Hex:


IP Address:
 Class:
Network Address: Broadcast Address:
First Host: Last Host:
Subnet Mask: Usable Hosts:

Class A:
Reserved:
0.0.0.0
Available:
1.0.0.0
thru
126.0.0.0
Reserved:
127.0.0.0

Network:
Octet 1
Host:
Octets 2 - 4 		Class B:
Reserved:
128.0.0.0
Available:
128.1.0.0
thru
191.254.0.0 Reserved:
191.255.0.0

Network:
Octets 1 & 2
Host:
Octets 3 & 4 		Class C:
Reserved:
192.0.0.0
Available:
192.0.1.0
thru
223.255.254.0 Reserved: 223.255.255.0

Network:
Octets 1 - 3
Host:
Octet 4 		Class D:
Internet's Multi-cast Backbone.
224.0.0.0
thru
239.255.255.255

 Class E:
Reserved:
Experimental Networks:
240.0.0.0
thru
255.255.255.255

Notes for the 801 CCNA Exam:

Private IP address space:
   10.0.0.0 - 10.255.255.255
   172.16.0.0 - 172.31.255.255
   192.168.0.0 - 192.168.255.255


Defined for broadcasts: 0.0.0.0 // OSPF multicast: 224.0.0.5 // loopback test: 127.0.0.1

BSIG: IP Address Classifier