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IPv6/CIDR Max. HostsNetmask
/1281ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
/1272ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe
/1264ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
/1258ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff8
/12416ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0
/12332ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffe0
/12264ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffc0
/121128ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff80
/120256ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00
/119512ffff:ffff:ffff:ffff:ffff:ffff:ffff:fe00
/1181024ffff:ffff:ffff:ffff:ffff:ffff:ffff:fc00
/1172048ffff:ffff:ffff:ffff:ffff:ffff:ffff:f800
/1164096ffff:ffff:ffff:ffff:ffff:ffff:ffff:f000
/1158192ffff:ffff:ffff:ffff:ffff:ffff:ffff:e000
/11416 384ffff:ffff:ffff:ffff:ffff:ffff:ffff:c000
/11332 768ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000
/11265 536ffff:ffff:ffff:ffff:ffff:ffff:ffff:0
/111131 072ffff:ffff:ffff:ffff:ffff:ffff:fffe:0
/110262 144ffff:ffff:ffff:ffff:ffff:ffff:fffc:0
/109524 288ffff:ffff:ffff:ffff:ffff:ffff:fff8:0
/1081 048 576ffff:ffff:ffff:ffff:ffff:ffff:fff0:0
/1072 097 152ffff:ffff:ffff:ffff:ffff:ffff:ffe0:0
/1064 194 304ffff:ffff:ffff:ffff:ffff:ffff:ffc0:0
/1058 388 608ffff:ffff:ffff:ffff:ffff:ffff:ff80:0
/10416 777 216ffff:ffff:ffff:ffff:ffff:ffff:ff00:0
/10333 554 432ffff:ffff:ffff:ffff:ffff:ffff:fe00:0
/10267 108 864ffff:ffff:ffff:ffff:ffff:ffff:fc00:0
/101134 217 728ffff:ffff:ffff:ffff:ffff:ffff:f800:0
/100268 435 456ffff:ffff:ffff:ffff:ffff:ffff:f000:0
/99536 870 912ffff:ffff:ffff:ffff:ffff:ffff:e000:0
/981 073 741 824ffff:ffff:ffff:ffff:ffff:ffff:c000:0
/972 147 483 648ffff:ffff:ffff:ffff:ffff:ffff:8000:0
/964 294 967 296ffff:ffff:ffff:ffff:ffff:ffff::
  more...

IPv6/CIDR

Example

Network: <= 2001:470:abcd:abcd::2/19
Example:
Network range
1.1.0.0-1.1.63.255
CIDR
Host address - 1.1.0.0
Host address (decimal) - 16842752
Host address (hex) - 1010000
Network address - 1.1.0.0
Network mask - 255.255.192.0
Network mask (bits) - 18
Network mask (hex) - FFFFC000
Broadcast address - 1.1.63.255
Cisco wildcard - 0.0.63.255
Addresses in network - 16384
Usable range - 1.1.0.1 - 1.1.63.254
Max. Hosts = 16382 (2^14 - 2)
Hosts Bits = 14

Online PHP functions
Encoding strings
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Encryption
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Length of string
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Processing strings
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Get all headers
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Converts (IPv4)
ip2long
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CIDR
IPv4 CIDR calculator
IPv4 CIDR to Host Range
IPv6 CIDR to Host Range
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