IPv4/IPv6 subnet calculator GestióIP
IP address management software


IPv4 IPv6
IP address
Prefix length   

IP address2001:db8:a0b:12f0::1/64
typeGLOBAL-UNICAST (reserved for documentation purpose (2001:db8::/32)
[rfc3849][IANA])
network2001:db8:a0b:12f0::
Prefix length64
network range
2001:0db8:0a0b:12f0:0000:0000:0000:0000-
2001:0db8:0a0b:12f0:ffff:ffff:ffff:ffff
total IP addresses18446744073709551616

IP address (full)2001:0db8:0a0b:12f0:0000:0000:0000:0001
integer ID42540766414390830568948465903729639425
hexadecimal ID0x20010db80a0b12f00000000000000001
dotted decimal ID32.1.13.184.10.11.18.240.0.0.0.0.0.0.0.1
base 85 ID9r}Vstbyz7$19|O(~JT0
binary ID
00100000000000010000110110111000...
ip6.arpa Format1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.2.1.b.0.a.0.8.b.d.0.1.0.0.2.ip6.arpa
MS ipv6.literal.net2001-db8-a0b-12f0--1.ipv6-literal.net


subnet-level I

IPv4/IPv6 subnet calculator and hierarchical IPv6 addressing plan builder

This is the online version of GestióIPv3's embedded subnet calculator. GestióIP is a free, web-based IP address management software.

To calculate an IP address select the IP version, introduce an IP address, choose a bitmask/prefix length and click "calculate".

In addition to the standard subnet calculator functions it can also be helpful in configuring IPv6 reverse DNS delegation as well as it can be used as IP address converter. It accepts the following IP address formats as input: dot-decimal notation (IPv4), colon-hexadecimal notation (IPv6), binary, integer, hexadecimal.

The subnet calculator includes an advanced IPv6 addressing plan builder which permits to create organization specific hierarchical IPv6 address allocation schemes. Read more...





For suggestions, comments or bugs relating to the subnet calculator mail to subnet_calculator@gestioip.net


last change: 28/01/2021







Online Subnet Calculator GestióIP Copyright © Marc Uebel 2017