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Calculator source:  www.thaemlitz.com


IPv4 Classful networks

Class Start End Default subnet mask CIDR
Class A* /8
Class B /16
Class C /24
Class D (multicast)
Class E (reserved)

* is reserved for loopback and can not be assigned.


Private Network Ranges

Class Start End CIDR
Class A /8
Class B /12
Class C /16

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