Classless Inter-Domain Routing (CIDR) Tools

Everything about this Classless Inter-Domain Routing address block

Base information

Address Block 2001:1::1/128
First address 2001:1::1
Last address 2001:1::1
Hosts in range 1
Mask bits 128

IANA Special-Purpose Registry

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

Address Block 2001:1::1/128
Purpose Port Control Protocol Anycast
Allocation Date October 2015
Termination Date N/A
Source true
Destination true
Forwardable true
Globally Reachable true
Reserved by protocol false
Defined in RFC [RFC7723]

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