Classless Inter-Domain Routing (CIDR) Tools

Everything about this Classless Inter-Domain Routing address block

Base information

Address Block 203.0.113.0/24
First address 203.0.113.0
Last address 203.0.113.255
Hosts in range 256
Mask bits 24

IANA Special-Purpose Registry

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

Address Block 203.0.113.0/24
Purpose Documentation (TEST-NET-3)
Allocation Date January 2010
Termination Date N/A
Source false
Destination false
Forwardable false
Globally Reachable false
Reserved by protocol false
Defined in RFC [RFC5737]

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