IPv6 Host/Prefix Sizes

From SolusVM

Hosts per Prefix:

/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  – 18,014,398,509,481,984
/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 <-- minimum recommended subnet for end users and required for SLAAC
/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 <-- recommended for end users with modest subnetting requirements
/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 <-- recommended for complex and/or multi-homed cases
/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 <-- PI space, allocated by RIRs.
/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 <-- (currently) only allocated to RIRs.
/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
/7   – 2,658,455,991,569,831,745,807,614,120,560,689,152
/6   – 5,316,911,983,139,663,491,615,228,241,121,378,304
/5   – 10,633,823,966,279,326,983,230,456,482,242,756,608
/4   – 21,267,647,932,558,653,966,460,912,964,485,513,216
/3   – 42,535,295,865,117,307,932,921,825,928,971,026,432 <-- the current size of the IPv6 internet (2000::/3)
/2   – 85,070,591,730,234,615,865,843,651,857,942,052,864
/1   – 170,141,183,460,469,231,731,687,303,715,884,105,728
/0   - 340,282,366,920,938,463,463,374,607,431,768,211,456