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