Classless Inter-Domain Routing (CIDR) Tools

Everything about this Classless Inter-Domain Routing address block

Base information

Address Block 0.0.0.0/8
First address 0.0.0.0
Last address 0.255.255.255
Hosts in range 16 777 216
Mask bits 8

IANA Special-Purpose Registry

This CIDR is in a special-purpose block reserved by IANA for special purposes.

Address Block 0.0.0.0/8
Purpose This host on this network
Allocation Date September 1981
Termination Date N/A
Source true
Destination false
Forwardable true
Globally Reachable false
Reserved by protocol true
Defined in RFC [RFC1122], Section 3.2.1.3

REST API

REST API on request

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CIDR information and calculator

Analyze a CIDR

Example: 127.0.0.0/8 or 2001:db8::/32