IPv6 utils is a useful toolkit for people doing IPv6 networking.
A hexadecimal number can have 16 different values (from 0 to 9 and from A to F), which corresponds to exactly 4 bits. As each group is composed of four hexadecimal numbers, each group has 16 bits:
16 32 48 64 80 96 112 128
| | | | | | | |
2a0e:a4eb:b50:000c:57f3:03f9:41f4:5533
IPv6 addresses can be used in different formats:
Uncompressed: 2a0e:a4eb:b50:000c:57f3:03f9:41f4:5533
Compressed: 2a0e:a4eb:b50:c:57f3:3f9:41f4:5533
Examples of network ranges (All areas in bold are free and usable):
-
2001:db8:1ee::/48 (65,536 networks /64):
- First address: 2001:db8:1ee:0000:0000:0000:0000:0000
- Last address: 2001:db8:1ee:ffff:ffff:ffff:ffff:ffff
-
2001:db8:1ee::/44 (1,048,576 networks /64):
- First address: 2001:db8:1e0:0000:0000:0000:0000:0000
- Last address: 2001:db8:1ef:ffff:ffff:ffff:ffff:ffff
- https://tunnelbroker.net/
- https://tb.netassist.ua/ (BGP enabled)
- https://tunnelbroker.ch/ (BGP enabled)
- https://route48.org/ (BGP enabled)
- https://securebit.ch/
- https://dyjix.eu/
- https://lir.services/
- https://ifog.ch/
- https://bakker-it.eu/
- https://flokinet.is/
- https://myroot.pw/
- https://hostus.us/
- https://freerangecloud.com/
- https://snapserv.net/
- https://servperso.net/
- https://route48.org/
- and many others ..
CIDR | Number of networks/addresses |
---|---|
/1 | 9,223,372,036,854,775,808 networks /64 |
/2 | 4,611,686,018,427,387,904 networks /64 |
/3 | 2,305,843,009,213,693,952 networks /64 |
/4 | 1,152,921,504,606,846,976 networks /64 |
/5 | 576,460,752,303,423,488 networks /64 |
/6 | 288,230,376,151,711,744 networks /64 |
/7 | 144,115,188,075,855,872 networks /64 |
/8 | 72,057,594,037,927,936 networks /64 |
/9 | 36,028,797,018,963,968 networks /64 |
/10 | 18,014,398,509,481,984 networks /64 |
/11 | 9,007,199,254,740,992 networks /64 |
/12 | 4,503,599,627,370,496 networks /64 |
/13 | 2,251,799,813,685,248 networks /64 |
/14 | 1,125,899,906,842,624 networks /64 |
/15 | 562,949,953,421,312 networks /64 |
/16 | 281,474,976,710,656 networks /64 |
/17 | 140,737,488,355,328 networks /64 |
/18 | 70,368,744,177,664 networks /64 |
/19 | 35,184,372,088,832 networks /64 |
/20 | 17,592,186,044,416 networks /64 |
/21 | 8,796,093,022,208 networks /64 |
/22 | 4,398,046,511,104 networks /64 |
/23 | 2,199,023,255,552 networks /64 |
/24 | 1,099,511,627,776 networks /64 |
/25 | 549,755,813,888 networks /64 |
/26 | 274,877,906,944 networks /64 |
/27 | 137,438,953,472 networks /64 |
/28 | 68,719,476,736 networks /64 |
/29 | 34,359,738,368 networks /64 |
/30 | 17,179,869,184 networks /64 |
/31 | 8,589,934,592 networks /64 |
/32 | 4,294,967,296 networks /64 |
/33 | 2,147,483,648 networks /64 |
/34 | 1,073,741,824 networks /64 |
/35 | 536,870,912 networks /64 |
/36 | 268,435,456 networks /64 |
/37 | 134,217,728 networks /64 |
/38 | 67,108,864 networks /64 |
/39 | 33,554,432 networks /64 |
/40 | 16,777,216 networks /64 |
/41 | 8,388,608 networks /64 |
/42 | 4,194,304 networks /64 |
/43 | 2,097,152 networks /64 |
/44 | 1,048,576 networks /64 |
/45 | 524,288 networks /64 |
/46 | 262,144 networks /64 |
/47 | 131,072 networks /64 |
/48 | 65,536 networks /64 |
/49 | 32,768 networks /64 |
/50 | 16,384 networks /64 |
/51 | 8,192 networks /64 |
/52 | 4,096 networks /64 |
/53 | 2,048 networks /64 |
/54 | 1,024 networks /64 |
/55 | 512 networks /64 |
/56 | 256 networks /64 |
/57 | 128 networks /64 |
/58 | 64 networks /64 |
/59 | 32 networks /64 |
/60 | 16 networks /64 |
/61 | 8 networks /64 |
/62 | 4 networks /64 |
/63 | 2 networks /64 |
/64 | 18,446,744,073,709,551,616 addresses |
/65 | 9,223,372,036,854,775,808 addresses |
/66 | 4,611,686,018,427,387,904 addresses |
/67 | 2,305,843,009,213,693,952 addresses |
/68 | 1,152,921,504,606,846,976 addresses |
/69 | 576,460,752,303,423,488 addresses |
/70 | 288,230,376,151,711,744 addresses |
/71 | 144,115,188,075,855,872 addresses |
/72 | 72,057,594,037,927,936 addresses |
/73 | 36,028,797,018,963,968 addresses |
/74 | 18,014,398,509,481,984 addresses |
/75 | 9,007,199,254,740,992 addresses |
/76 | 4,503,599,627,370,496 addresses |
/77 | 2,251,799,813,685,248 addresses |
/78 | 1,125,899,906,842,624 addresses |
/79 | 562,949,953,421,312 addresses |
/80 | 281,474,976,710,656 addresses |
/81 | 140,737,488,355,328 addresses |
/82 | 70,368,744,177,664 addresses |
/83 | 35,184,372,088,832 addresses |
/84 | 17,592,186,044,416 addresses |
/85 | 8,796,093,022,208 addresses |
/86 | 4,398,046,511,104 addresses |
/87 | 2,199,023,255,552 addresses |
/88 | 1,099,511,627,776 addresses |
/89 | 549,755,813,888 addresses |
/90 | 274,877,906,944 addresses |
/91 | 137,438,953,472 addresses |
/92 | 68,719,476,736 addresses |
/93 | 34,359,738,368 addresses |
/94 | 17,179,869,184 addresses |
/95 | 8,589,934,592 addresses |
/96 | 4,294,967,296 addresses |
/97 | 2,147,483,648 addresses |
/98 | 1,073,741,824 addresses |
/99 | 536,870,912 addresses |
/100 | 268,435,456 addresses |
/101 | 134,217,728 addresses |
/102 | 67,108,864 addresses |
/103 | 33,554,432 addresses |
/104 | 16,777,216 addresses |
/105 | 8,388,608 addresses |
/106 | 4,194,304 addresses |
/107 | 2,097,152 addresses |
/108 | 1,048,576 addresses |
/109 | 524,288 addresses |
/110 | 262,144 addresses |
/111 | 131,072 addresses |
/112 | 65,536 addresses |
/113 | 32,768 addresses |
/114 | 16,384 addresses |
/115 | 8,192 addresses |
/116 | 4,096 addresses |
/117 | 2,048 addresses |
/118 | 1,024 addresses |
/119 | 512 addresses |
/120 | 256 addresses |
/121 | 128 addresses |
/122 | 64 addresses |
/123 | 32 addresses |
/124 | 16 addresses |
/125 | 8 addresses |
/126 | 4 addresses |
/127 | 2 addresses |
/128 | 1 address |
Prefix | Description | IPv4 equivalent |
---|---|---|
::1/128 | Loopback | 127.0.0.1 |
fe80::/10 | Link-Local | 169.254.0.0/16 |
2000::/3 | Global Unicast | |
fc00::/7 | Unique Local | 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 |
ff00::/8 | Multicast | 224.0.0.0/4 |
2001:db8::/32 | Documentation | 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24 |
::/128 | Unspecified | 0.0.0.0 |
::/8 | Reserved |