Category: Networking Basics

Class B IP: IPv4 Network and Address Ranges Explained

Jun 12, 2026

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by

Stacy Koehn

in Networking Basics

Class B IP addresses use first octets 128–191 and span 128.0.0.0–191.255.255.255. Learn the default /16 network-host split, reserved ranges, private space, and CIDR’s modern role.