Network: 12.128.28.56/31
Addresses: 2 (2¹)
First IP: 12.128.28.56 (56.28.128.12.in-addr.arpa)
Last IP: 12.128.28.57 (57.28.128.12.in-addr.arpa)

/8 Operated By: AT&T Bell Laboratories

• 12.0.0.0/8
• 11.0.0.0/8
• 13.0.0.0/8
• 12.128.28.56/30
• 12.128.28.56/32
• 12.128.28.57/32

• 0.0.0.0/0
• 1.0.0.0/8
• 127.0.0.1
• 30.0.0.0/8
• 192.168.0.0/16