Network address
2001:668:0:4:21::
Full
2001:0668:0000:0004:0021:0000:0000:0000
Prefix length
80
Range
2001:668:0:4:21:: - 2001:668:0:4:21:ffff:ffff:ffff
Number of hosts
281,474,976,710,656
Parent subnet
2001:668:0:4:20::/79🔍
Previous subnet
2001:668:0:4:20::/80🔍
Next subnet
2001:668:0:4:22::/80🔍