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Updated README.md.
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‎README.md‎

Lines changed: 89 additions & 88 deletions
Original file line numberDiff line numberDiff line change
@@ -27,105 +27,106 @@ My host has IP 132.252.150.254 and netmask 255.255.255.240. What are the details
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```
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user@host:~$ subnetcalc 132.252.150.254 255.255.255.240
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Address = 132.252.150.254
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10000100 . 11111100 . 10010110 . 11111110
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Network = 132.252.150.240 / 28
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Netmask = 255.255.255.240
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Broadcast = 132.252.150.255
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Wildcard Mask = 0.0.0.15
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Hosts Bits = 4
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Max. Hosts = 14 (2^4 - 2)
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Host Range = { 132.252.150.241 - 132.252.150.254 }
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Properties =
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Address = 132.252.150.254
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10000100 . 11111100 . 10010110 . 11111110
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Network = 132.252.150.240 / 28
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Netmask = 255.255.255.240
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Broadcast = 132.252.150.255
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Wildcard Mask = 0.0.0.15
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Hex. Address = 84FC96FE
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Hosts Bits = 4
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Max. Hosts = 14 (2^4 - 2)
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Host Range = { 132.252.150.241 - 132.252.150.254 }
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Properties =
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- 132.252.150.254 is a HOST address in 132.252.150.240/28
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- Class B
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GeoIP Country = Germany (DE)
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DNS Hostname = dummy.iem.uni-duisburg-essen.de
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```
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Consider host www.six.heise.de uses a 64-bit prefix length. What are the details of its network?
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```
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user@host:~$ subnetcalc www.six.heise.de 64
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Address = 2a02:2e0:3fe:100::6
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2a02 = 00101010 00000010
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02e0 = 00000010 11100000
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03fe = 00000011 11111110
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0100 = 00000001 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0006 = 00000000 00000110
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Network = 2a02:2e0:3fe:100:: / 64
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Netmask = ffff:ffff:ffff:ffff::
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Wildcard Mask = ::ffff:ffff:ffff:ffff
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Hosts Bits = 64
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Max. Hosts = 18446744073709551616 (2^64 - 1)
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Host Range = { 2a02:2e0:3fe:100::1 - 2a02:2e0:3fe:100:ffff:ffff:ffff:ffff }
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Properties =
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- 2a02:2e0:3fe:100::6 is a HOST address in 2a02:2e0:3fe:100::/64
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DNS Hostname = dummy.iem.uni-due.de
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```
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Consider host www.heise.de uses a 64-bit prefix length. What are the details of its network?
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```
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user@host:~$ subnetcalc www.heise.de 64
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Address = 2a02:2e0:3fe:1001:7777:772e:2:85
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2a02 = 00101010 00000010
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02e0 = 00000010 11100000
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03fe = 00000011 11111110
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1001 = 00010000 00000001
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7777 = 01110111 01110111
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772e = 01110111 00101110
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0002 = 00000000 00000010
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0085 = 00000000 10000101
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Network = 2a02:2e0:3fe:1001:: / 64
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Netmask = ffff:ffff:ffff:ffff::
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Wildcard Mask = ::ffff:ffff:ffff:ffff
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Hosts Bits = 64
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Max. Hosts = 18446744073709551615 (2^64 - 1)
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Host Range = { 2a02:2e0:3fe:1001::1 - 2a02:2e0:3fe:1001:ffff:ffff:ffff:ffff }
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Properties =
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- 2a02:2e0:3fe:1001:7777:772e:2:85 is a HOST address in 2a02:2e0:3fe:1001::/64
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- Global Unicast Properties:
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+ Interface ID = 0000:0000:0000:0006
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+ Sol. Node MC = ff02::1:ff00:0006
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GeoIP Country = Germany (DE)
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DNS Hostname = www.six.heise.de
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+ Interface ID = 7777:772e:0002:0085
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+ Solicited Node Multicast Address = ff02::1:ff02:0085
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+ 6-to-4 Address = 2.224.3.254
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DNS Hostname = www.heise.de
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```
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My new host should use Interface ID 0x100 and Subnet ID 0x1234. Generate a Unique Local IPv6 prefix (40-bit Global ID) for my intranet, using high-quality random numbers!
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```
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user@host:~$ subnetcalc 0:0:0:1234::1 56 -uniquelocalhq
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Address = fded:30d0:1072:1234::1
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fded = 11111101 11101101
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30d0 = 00110000 11010000
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1072 = 00010000 01110010
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1234 = 00010010 00110100
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0001 = 00000000 00000001
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Network = fded:30d0:1072:1200:: / 56
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Netmask = ffff:ffff:ffff:ff00::
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Wildcard Mask = ::ff:ffff:ffff:ffff:ffff
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Hosts Bits = 72
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Max. Hosts = 4722366482869645213696 (2^72 - 1)
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Host Range = { fded:30d0:1072:1200::1 - fded:30d0:1072:12ff:ffff:ffff:ffff:ffff }
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Properties =
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- fded:30d0:1072:1234::1 is a HOST address in fded:30d0:1072:1200::/56
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Generating Unique Local IPv6 address (using /dev/random) ...
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Address = fd97:1303:1402:1234::1
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fd97 = 11111101 10010111
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1303 = 00010011 00000011
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1402 = 00010100 00000010
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1234 = 00010010 00110100
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0001 = 00000000 00000001
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Network = fd97:1303:1402:1200:: / 56
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Netmask = ffff:ffff:ffff:ff00::
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Wildcard Mask = ::ff:ffff:ffff:ffff:ffff
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Hosts Bits = 72
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Max. Hosts = 4722366482869645213695 (2^72 - 1)
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Host Range = { fd97:1303:1402:1200::1 - fd97:1303:1402:12ff:ffff:ffff:ffff:ffff }
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Properties =
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- fd97:1303:1402:1234::1 is a HOST address in fd97:1303:1402:1200::/56
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- Unique Local Unicast Properties:
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+ Locally chose
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+ Global ID = ed30d01072
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+ Subnet ID = 1234
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+ Interface ID = 0000:0000:0000:0001
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+ Sol. Node MC = ff02::1:ff00:0001
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GeoIP Country = Unknown (??)
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DNS Hostname = (Name or service not known)
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```
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Which are DNS reverse lookup name and geo location country of IP 2401:3800:c001::68?
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```
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user@host:~$ subnetcalc 2401:3800:c001::68
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Address = 2401:3800:c001::68
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2401 = 00100100 00000001
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3800 = 00111000 00000000
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c001 = 11000000 00000001
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0068 = 00000000 01101000
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Network = 2401:3800:c001::68 / 128
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Netmask = ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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Wildcard Mask = ::
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Hosts Bits = 0
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Max. Hosts = 0 (2^0 - 1)
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Host Range = { 2401:3800:c001::69 - 2401:3800:c001::68 }
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Properties =
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- 2401:3800:c001::68 is a NETWORK address
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+ Locally chosen
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+ Global ID = 9713031402
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+ Subnet ID = 1234
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+ Interface ID = 0000:0000:0000:0001
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+ Solicited Node Multicast Address = ff02::1:ff00:0001
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DNS Hostname = (Name or service not known)
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```
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Which are DNS reverse lookup name and geo location country of IP 2402:f000:1:400::2?
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```
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user@host:~$ subnetcalc 2402:f000:1:400::2
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Address = 2402:f000:1:400::2
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2402 = 00100100 00000010
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f000 = 11110000 00000000
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0001 = 00000000 00000001
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0400 = 00000100 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0000 = 00000000 00000000
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0002 = 00000000 00000010
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Network = 2402:f000:1:400::2 / 128
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Netmask = ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
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Wildcard Mask = ::
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Hosts Bits = 0
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Max. Hosts = 1 (2^0 - 0)
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Host Range = { 2402:f000:1:400::2 - 2402:f000:1:400::2 }
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Properties =
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- 2402:f000:1:400::2 is a HOST address in 2402:f000:1:400::2/128
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- Global Unicast Properties:
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+ Interface ID = 0000:0000:0000:0068
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+ Sol. Node MC = ff02::1:ff00:0068
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+ Interface ID = 0000:0000:0000:0002
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+ Solicited Node Multicast Address = ff02::1:ff00:0002
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+ 6-to-4 Address = 240.0.0.1
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GeoIP Country = China (CN)
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DNS Hostname = bg-in-x68.1e100.net
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```

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