IP Primary Network Addresses

• Class A: 0 through 127; e.g. 10.2.0.37

  • netid = 10. and hostids = 10.0.0.0 to 10.255.255.255
  • Note: 127.0.0.0 network addresses are reserved for loopback addressing
  • 24-bits available; 16,777,216 possible hostid IP addresses

• Class B: 128 through 191; e.g. 129.24.24.119

  • netid = 129.24. and hostids = 129.24.0.0 to 129.24.255.255
  • 16-bits available; 65,536 possible hostid IP addresses

• Class C: 192 through 223; e.g. 198.6.7.3

  • netid = 198.6.7. and hostids = 198.6.7.0 to 198.6.7.255
  • 8-bits available; 256 possible hostid IP addresses

Previous slide

Next slide

Back to first slide

View graphic version