bitmand

ipv6 address scopes

IPv6 Address Scope | Description
------------------ | -----------
            ::/128 | unspecified address
           ::1/128 | localhost
         fe80::/10 | link local
          fc00::/7 | unique local unicast (RFC 4193)
          ff00::/8 | multicast, following after the prefix ff there are
                   | 4 bits for flags and 4 bits for the scope
     ::ffff:0:0/96 | ipv4 to ipv6 address, eg: ::ffff:10.10.10.10 (RFC 4038)
          2000::/3 | global unicast
     2001::/16 /32 | subnets assigned to providers, they assign /48, /56 or
                   | /64 to the customer
     2001:db8::/32 | reserved for use in documentation
     2001:678::/29 | provider independent (PI) adresses and anycasting
                   | TLD nameservers
         2002::/16 | 6to4 scope, 2002:c058:6301:: is the 6to4 public
                   | router anycast

(RFC 4193, RFC 4038, RFC 3068)

ipv6 prefix lengths

2402:9400:0000:0000:0000:0000:0000:0001
XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX
|||| |||| |||| |||| |||| |||| |||| ||||
|||| |||| |||| |||| |||| |||| |||| |||128
|||| |||| |||| |||| |||| |||| |||| ||124
|||| |||| |||| |||| |||| |||| |||| |120
|||| |||| |||| |||| |||| |||| |||| 116
|||| |||| |||| |||| |||| |||| |||112
|||| |||| |||| |||| |||| |||| ||108
|||| |||| |||| |||| |||| |||| |104
|||| |||| |||| |||| |||| |||| 100
|||| |||| |||| |||| |||| |||96
|||| |||| |||| |||| |||| ||92
|||| |||| |||| |||| |||| |88
|||| |||| |||| |||| |||| 84
|||| |||| |||| |||| |||80
|||| |||| |||| |||| ||76
|||| |||| |||| |||| |72
|||| |||| |||| |||| 68
|||| |||| |||| |||64
|||| |||| |||| ||60
|||| |||| |||| |56
|||| |||| |||| 52
|||| |||| |||48
|||| |||| ||44
|||| |||| |40
|||| |||| 36
|||| |||32
|||| ||28
|||| |24
|||| 20
|||16
||12
|8
4

ipv6 subnet sizes

IPv6 CIDR  | Number of IPs
---------- | -------------
      /128 | 1
      /127 | 2
      /126 | 4
      /125 | 8
      /124 | 16
      /123 | 32
      /122 | 64
      /121 | 128
      /120 | 256
      /119 | 512
      /118 | 1,024
      /117 | 2,048
      /116 | 4,096
      /115 | 8,192
      /114 | 16,384
      /113 | 32,768
      /112 | 65,536
      /111 | 131,072
      /110 | 262,144
      /109 | 524,288
      /108 | 1,048,576
      /107 | 2,097,152
      /106 | 4,194,304
      /105 | 8,388,608
      /104 | 16,777,216
      /103 | 33,554,432
      /102 | 67,108,864
      /101 | 134,217,728
      /100 | 268,435,456
      /99  | 536,870,912
      /98  | 1,073,741,824
      /97  | 2,147,483,648
      /96  | 4,294,967,296
      /95  | 8,589,934,592
      /94  | 17,179,869,184
      /93  | 34,359,738,368
      /92  | 68,719,476,736
      /91  | 137,438,953,472
      /90  | 274,877,906,944
      /89  | 549,755,813,888
      /88  | 1,099,511,627,776
      /87  | 2,199,023,255,552
      /86  | 4,398,046,511,104
      /85  | 8,796,093,022,208
      /84  | 17,592,186,044,416
      /83  | 35,184,372,088,832
      /82  | 70,368,744,177,664
      /81  | 140,737,488,355,328
      /80  | 281,474,976,710,656
      /79  | 562,949,953,421,312
      /78  | 1,125,899,906,842,624
      /77  | 2,251,799,813,685,248
      /76  | 4,503,599,627,370,496
      /75  | 9,007,199,254,740,992
      /74  | 18,014,398,509,481,985
      /73  | 36,028,797,018,963,968
      /72  | 72,057,594,037,927,936
      /71  | 144,115,188,075,855,872
      /70  | 288,230,376,151,711,744
      /69  | 576,460,752,303,423,488
      /68  | 1,152,921,504,606,846,976
      /67  | 2,305,843,009,213,693,952
      /66  | 4,611,686,018,427,387,904
      /65  | 9,223,372,036,854,775,808
      /64  | 18,446,744,073,709,551,616 (residential)
      /63  | 36,893,488,147,419,103,232
      /62  | 73,786,976,294,838,206,464
      /61  | 147,573,952,589,676,412,928
      /60  | 295,147,905,179,352,825,856
      /59  | 590,295,810,358,705,651,712
      /58  | 1,180,591,620,717,411,303,424
      /57  | 2,361,183,241,434,822,606,848
      /56  | 4,722,366,482,869,645,213,696
      /55  | 9,444,732,965,739,290,427,392
      /54  | 18,889,465,931,478,580,854,784
      /53  | 37,778,931,862,957,161,709,568
      /52  | 75,557,863,725,914,323,419,136
      /51  | 151,115,727,451,828,646,838,272
      /50  | 302,231,454,903,657,293,676,544
      /49  | 604,462,909,807,314,587,353,088
      /48  | 1,208,925,819,614,629,174,706,176 (business)
      /47  | 2,417,851,639,229,258,349,412,352
      /46  | 4,835,703,278,458,516,698,824,704
      /45  | 9,671,406,556,917,033,397,649,408
      /44  | 19,342,813,113,834,066,795,298,816
      /43  | 38,685,626,227,668,133,590,597,632
      /42  | 77,371,252,455,336,267,181,195,264
      /41  | 154,742,504,910,672,534,362,390,528
      /40  | 309,485,009,821,345,068,724,781,056
      /39  | 618,970,019,642,690,137,449,562,112
      /38  | 1,237,940,039,285,380,274,899,124,224
      /37  | 2,475,880,078,570,760,549,798,248,448
      /36  | 4,951,760,157,141,521,099,596,496,896
      /35  | 9,903,520,314,283,042,199,192,993,792
      /34  | 19,807,040,628,566,084,398,385,987,584
      /33  | 39,614,081,257,132,168,796,771,975,168
      /32  | 79,228,162,514,264,337,593,543,950,336 (ISP)
      /31  | 158,456,325,028,528,675,187,087,900,672
      /30  | 316,912,650,057,057,350,374,175,801,344
      /29  | 633,825,300,114,114,700,748,351,602,688
      /28  | 1,267,650,600,228,229,401,496,703,205,376
      /27  | 2,535,301,200,456,458,802,993,406,410,752
      /26  | 5,070,602,400,912,917,605,986,812,821,504
      /25  | 10,141,204,801,825,835,211,973,625,643,008
      /24  | 20,282,409,603,651,670,423,947,251,286,016
      /23  | 40,564,819,207,303,340,847,894,502,572,032
      /22  | 81,129,638,414,606,681,695,789,005,144,064
      /21  | 162,259,276,829,213,363,391,578,010,288,128
      /20  | 324,518,553,658,426,726,783,156,020,576,256
      /19  | 649,037,107,316,853,453,566,312,041,152,512
      /18  | 1,298,074,214,633,706,907,132,624,082,305,024
      /17  | 2,596,148,429,267,413,814,265,248,164,610,048
      /16  | 5,192,296,858,534,827,628,530,496,329,220,096
      /15  | 10,384,593,717,069,655,257,060,992,658,440,192
      /14  | 20,769,187,434,139,310,514,121,985,316,880,384
      /13  | 41,538,374,868,278,621,028,243,970,633,760,768
      /12  | 83,076,749,736,557,242,056,487,941,267,521,536
      /11  | 166,153,499,473,114,484,112,975,882,535,043,072
      /10  | 332,306,998,946,228,968,225,951,765,070,086,144
      /9   | 664,613,997,892,457,936,451,903,530,140,172,288
      /8   | 1,329,227,995,784,915,872,903,807,060,280,344,576