| No organization would ever receive an allocation of this size |
| Regional Internet Registry/very large organization/ISP allocation sizes |
| ISP/large organization allocation sizes |
| Organization allocation sizes |
| End-user allocation sizes |
| Sub-allocations for same enduser |
| (Single address) |
| CIDR |
Start of range |
End of range |
Total addresses |
Total /64 subnets |
|---|
::/0 |
:: |
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
340,282,366,920,938,500,000,000,000,000,000,000,000 |
18,446,744,073,709,552,000 |
::/1 |
:: |
7fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
170,141,183,460,469,230,000,000,000,000,000,000,000 |
9,223,372,036,854,776,000 |
::/2 |
:: |
3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
85,070,591,730,234,620,000,000,000,000,000,000,000 |
4,611,686,018,427,388,000 |
2000::/3 |
2000:: |
3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
42,535,295,865,117,310,000,000,000,000,000,000,000 |
2,305,843,009,213,693,400 |
2000::/4 |
2000:: |
2fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
21,267,647,932,558,654,000,000,000,000,000,000,000 |
1,152,921,504,606,847,000 |
2000::/5 |
2000:: |
27ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
10,633,823,966,279,327,000,000,000,000,000,000,000 |
576,460,752,303,423,500 |
2000::/6 |
2000:: |
23ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
5,316,911,983,139,664,000,000,000,000,000,000,000 |
288,230,376,151,711,740 |
2000::/7 |
2000:: |
21ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
2,658,455,991,569,832,000,000,000,000,000,000,000 |
144,115,188,075,855,870 |
2000::/8 |
2000:: |
20ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
1,329,227,995,784,916,000,000,000,000,000,000,000 |
72,057,594,037,927,940 |
2000::/9 |
2000:: |
207f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
664,613,997,892,458,000,000,000,000,000,000,000 |
36,028,797,018,963,970 |
2000::/10 |
2000:: |
203f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
332,306,998,946,229,000,000,000,000,000,000,000 |
18,014,398,509,481,984 |
2000::/11 |
2000:: |
201f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
166,153,499,473,114,500,000,000,000,000,000,000 |
9,007,199,254,740,992 |
2000::/12 |
2000:: |
200f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
83,076,749,736,557,240,000,000,000,000,000,000 |
4,503,599,627,370,496 |
2000::/13 |
2000:: |
2007:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
41,538,374,868,278,620,000,000,000,000,000,000 |
2,251,799,813,685,248 |
2000::/14 |
2000:: |
2003:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
20,769,187,434,139,310,000,000,000,000,000,000 |
1,125,899,906,842,624 |
2000::/15 |
2000:: |
2001:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
10,384,593,717,069,655,000,000,000,000,000,000 |
562,949,953,421,312 |
2001::/16 |
2001:: |
2001:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
5,192,296,858,534,828,000,000,000,000,000,000 |
281,474,976,710,656 |
2001::/17 |
2001:: |
2001:7fff:ffff:ffff:ffff:ffff:ffff:ffff |
2,596,148,429,267,414,000,000,000,000,000,000 |
140,737,488,355,328 |
2001::/18 |
2001:: |
2001:3fff:ffff:ffff:ffff:ffff:ffff:ffff |
1,298,074,214,633,707,000,000,000,000,000,000 |
70,368,744,177,664 |
2001::/19 |
2001:: |
2001:1fff:ffff:ffff:ffff:ffff:ffff:ffff |
649,037,107,316,853,500,000,000,000,000,000 |
35,184,372,088,832 |
2001::/20 |
2001:: |
2001:0fff:ffff:ffff:ffff:ffff:ffff:ffff |
324,518,553,658,426,730,000,000,000,000,000 |
17,592,186,044,416 |
2001:800::/21 |
2001:800:: |
2001:0fff:ffff:ffff:ffff:ffff:ffff:ffff |
162,259,276,829,213,360,000,000,000,000,000 |
8,796,093,022,208 |
2001:c00::/22 |
2001:c00:: |
2001:0fff:ffff:ffff:ffff:ffff:ffff:ffff |
81,129,638,414,606,680,000,000,000,000,000 |
4,398,046,511,104 |
2001:c00::/23 |
2001:c00:: |
2001:0dff:ffff:ffff:ffff:ffff:ffff:ffff |
40,564,819,207,303,340,000,000,000,000,000 |
2,199,023,255,552 |
2001:d00::/24 |
2001:d00:: |
2001:0dff:ffff:ffff:ffff:ffff:ffff:ffff |
20,282,409,603,651,670,000,000,000,000,000 |
1,099,511,627,776 |
2001:d80::/25 |
2001:d80:: |
2001:0dff:ffff:ffff:ffff:ffff:ffff:ffff |
10,141,204,801,825,835,000,000,000,000,000 |
549,755,813,888 |
2001:d80::/26 |
2001:d80:: |
2001:0dbf:ffff:ffff:ffff:ffff:ffff:ffff |
5,070,602,400,912,918,000,000,000,000,000 |
274,877,906,944 |
2001:da0::/27 |
2001:da0:: |
2001:0dbf:ffff:ffff:ffff:ffff:ffff:ffff |
2,535,301,200,456,459,000,000,000,000,000 |
137,438,953,472 |
2001:db0::/28 |
2001:db0:: |
2001:0dbf:ffff:ffff:ffff:ffff:ffff:ffff |
1,267,650,600,228,229,400,000,000,000,000 |
68,719,476,736 |
2001:db8::/29 |
2001:db8:: |
2001:0dbf:ffff:ffff:ffff:ffff:ffff:ffff |
633,825,300,114,114,700,000,000,000,000 |
34,359,738,368 |
2001:db8::/30 |
2001:db8:: |
2001:0dbb:ffff:ffff:ffff:ffff:ffff:ffff |
316,912,650,057,057,350,000,000,000,000 |
17,179,869,184 |
2001:db8::/31 |
2001:db8:: |
2001:0db9:ffff:ffff:ffff:ffff:ffff:ffff |
158,456,325,028,528,680,000,000,000,000 |
8,589,934,592 |
2001:db8::/32 |
2001:db8:: |
2001:db8:ffff:ffff:ffff:ffff:ffff:ffff |
79,228,162,514,264,340,000,000,000,000 |
4,294,967,296 |
2001:db8::/33 |
2001:db8:: |
2001:db8:7fff:ffff:ffff:ffff:ffff:ffff |
39,614,081,257,132,170,000,000,000,000 |
2,147,483,648 |
2001:db8::/34 |
2001:db8:: |
2001:db8:3fff:ffff:ffff:ffff:ffff:ffff |
19,807,040,628,566,084,000,000,000,000 |
1,073,741,824 |
2001:db8::/35 |
2001:db8:: |
2001:db8:1fff:ffff:ffff:ffff:ffff:ffff |
9,903,520,314,283,042,000,000,000,000 |
536,870,912 |
2001:db8::/36 |
2001:db8:: |
2001:db8:0fff:ffff:ffff:ffff:ffff:ffff |
4,951,760,157,141,521,000,000,000,000 |
268,435,456 |
2001:db8::/37 |
2001:db8:: |
2001:db8:07ff:ffff:ffff:ffff:ffff:ffff |
2,475,880,078,570,760,500,000,000,000 |
134,217,728 |
2001:db8::/38 |
2001:db8:: |
2001:db8:03ff:ffff:ffff:ffff:ffff:ffff |
1,237,940,039,285,380,300,000,000,000 |
67,108,864 |
2001:db8::/39 |
2001:db8:: |
2001:db8:01ff:ffff:ffff:ffff:ffff:ffff |
618,970,019,642,690,200,000,000,000 |
33,554,432 |
2001:db8::/40 |
2001:db8:: |
2001:db8:00ff:ffff:ffff:ffff:ffff:ffff |
309,485,009,821,345,100,000,000,000 |
16,777,216 |
2001:db8::/41 |
2001:db8:: |
2001:db8:007f:ffff:ffff:ffff:ffff:ffff |
154,742,504,910,672,530,000,000,000 |
8,388,608 |
2001:db8::/42 |
2001:db8:: |
2001:db8:003f:ffff:ffff:ffff:ffff:ffff |
77,371,252,455,336,270,000,000,000 |
4,194,304 |
2001:db8::/43 |
2001:db8:: |
2001:db8:001f:ffff:ffff:ffff:ffff:ffff |
38,685,626,227,668,134,000,000,000 |
2,097,152 |
2001:db8::/44 |
2001:db8:: |
2001:db8:000f:ffff:ffff:ffff:ffff:ffff |
19,342,813,113,834,067,000,000,000 |
1,048,576 |
2001:db8::/45 |
2001:db8:: |
2001:db8:0007:ffff:ffff:ffff:ffff:ffff |
9,671,406,556,917,033,000,000,000 |
524,288 |
2001:db8::/46 |
2001:db8:: |
2001:db8:0003:ffff:ffff:ffff:ffff:ffff |
4,835,703,278,458,517,000,000,000 |
262,144 |
2001:db8::/47 |
2001:db8:: |
2001:db8:0001:ffff:ffff:ffff:ffff:ffff |
2,417,851,639,229,258,300,000,000 |
131,072 |
2001:db8::/48 |
2001:db8:: |
2001:db8:0000:ffff:ffff:ffff:ffff:ffff |
1,208,925,819,614,629,200,000,000 |
65,536 |
2001:db8::/49 |
2001:db8:: |
2001:db8:0000:7fff:ffff:ffff:ffff:ffff |
604,462,909,807,314,600,000,000 |
32,768 |
2001:db8::/50 |
2001:db8:: |
2001:db8:0000:3fff:ffff:ffff:ffff:ffff |
302,231,454,903,657,300,000,000 |
16,384 |
2001:db8::/51 |
2001:db8:: |
2001:db8:0000:1fff:ffff:ffff:ffff:ffff |
151,115,727,451,828,650,000,000 |
8,192 |
2001:db8::/52 |
2001:db8:: |
2001:db8:0000:0fff:ffff:ffff:ffff:ffff |
75,557,863,725,914,320,000,000 |
4,096 |
2001:db8::/53 |
2001:db8:: |
2001:db8:0000:07ff:ffff:ffff:ffff:ffff |
37,778,931,862,957,160,000,000 |
2,048 |
2001:db8::/54 |
2001:db8:: |
2001:db8:0000:03ff:ffff:ffff:ffff:ffff |
18,889,465,931,478,580,000,000 |
1,024 |
2001:db8::/55 |
2001:db8:: |
2001:db8:0000:01ff:ffff:ffff:ffff:ffff |
9,444,732,965,739,290,000,000 |
512 |
2001:db8::/56 |
2001:db8:: |
2001:db8:0000:00ff:ffff:ffff:ffff:ffff |
4,722,366,482,869,645,000,000 |
256 |
2001:db8::/57 |
2001:db8:: |
2001:db8:0000:007f:ffff:ffff:ffff:ffff |
2,361,183,241,434,822,600,000 |
128 |
2001:db8::/58 |
2001:db8:: |
2001:db8:0000:003f:ffff:ffff:ffff:ffff |
1,180,591,620,717,411,300,000 |
64 |
2001:db8::/59 |
2001:db8:: |
2001:db8:0000:001f:ffff:ffff:ffff:ffff |
590,295,810,358,705,700,000 |
32 |
2001:db8::/60 |
2001:db8:: |
2001:db8:0000:000f:ffff:ffff:ffff:ffff |
295,147,905,179,352,830,000 |
16 |
2001:db8::/61 |
2001:db8:: |
2001:db8:0000:0007:ffff:ffff:ffff:ffff |
147,573,952,589,676,410,000 |
8 |
2001:db8::/62 |
2001:db8:: |
2001:db8:0000:0003:ffff:ffff:ffff:ffff |
73,786,976,294,838,210,000 |
4 |
2001:db8::/63 |
2001:db8:: |
2001:db8:0000:0001:ffff:ffff:ffff:ffff |
36,893,488,147,419,103,000 |
2 |
2001:db8::/64 |
2001:db8:: |
2001:db8:0000:0000:ffff:ffff:ffff:ffff |
18,446,744,073,709,552,000 |
1 |
2001:db8::/65 |
2001:db8:: |
2001:db8:0000:0000:7fff:ffff:ffff:ffff |
9,223,372,036,854,776,000 |
- |
2001:db8::/66 |
2001:db8:: |
2001:db8:0000:0000:3fff:ffff:ffff:ffff |
4,611,686,018,427,388,000 |
2001:db8::/67 |
2001:db8:: |
2001:db8:0000:0000:1fff:ffff:ffff:ffff |
2,305,843,009,213,694,000 |
2001:db8::/68 |
2001:db8:: |
2001:db8:0000:0000:0fff:ffff:ffff:ffff |
1,152,921,504,606,847,000 |
2001:db8::/69 |
2001:db8:: |
2001:db8:0000:0000:07ff:ffff:ffff:ffff |
576,460,752,303,423,500 |
2001:db8::/70 |
2001:db8:: |
2001:db8:0000:0000:03ff:ffff:ffff:ffff |
288,230,376,151,711,740 |
2001:db8::/71 |
2001:db8:: |
2001:db8:0000:0000:01ff:ffff:ffff:ffff |
144,115,188,075,855,870 |
2001:db8::/72 |
2001:db8:: |
2001:db8:0000:0000:00ff:ffff:ffff:ffff |
72,057,594,037,927,940 |
2001:db8::/73 |
2001:db8:: |
2001:db8:0000:0000:007f:ffff:ffff:ffff |
36,028,797,018,963,970 |
2001:db8::/74 |
2001:db8:: |
2001:db8:0000:0000:003f:ffff:ffff:ffff |
18,014,398,509,481,984 |
2001:db8::/75 |
2001:db8:: |
2001:db8:0000:0000:001f:ffff:ffff:ffff |
9,007,199,254,740,992 |
2001:db8::/76 |
2001:db8:: |
2001:db8:0000:0000:000f:ffff:ffff:ffff |
4,503,599,627,370,496 |
2001:db8::/77 |
2001:db8:: |
2001:db8:0000:0000:0007:ffff:ffff:ffff |
2,251,799,813,685,248 |
2001:db8::/78 |
2001:db8:: |
2001:db8:0000:0000:0003:ffff:ffff:ffff |
1,125,899,906,842,624 |
2001:db8::/79 |
2001:db8:: |
2001:db8:0000:0000:0001:ffff:ffff:ffff |
562,949,953,421,312 |
2001:db8::/80 |
2001:db8:: |
2001:db8:0000:0000:0000:ffff:ffff:ffff |
281,474,976,710,656 |
2001:db8::/81 |
2001:db8:: |
2001:db8:0000:0000:0000:7fff:ffff:ffff |
140,737,488,355,328 |
2001:db8::/82 |
2001:db8:: |
2001:db8:0000:0000:0000:3fff:ffff:ffff |
70,368,744,177,664 |
2001:db8::/83 |
2001:db8:: |
2001:db8:0000:0000:0000:1fff:ffff:ffff |
35,184,372,088,832 |
2001:db8::/84 |
2001:db8:: |
2001:db8:0000:0000:0000:0fff:ffff:ffff |
17,592,186,044,416 |
2001:db8::/85 |
2001:db8:: |
2001:db8:0000:0000:0000:07ff:ffff:ffff |
8,796,093,022,208 |
2001:db8::/86 |
2001:db8:: |
2001:db8:0000:0000:0000:03ff:ffff:ffff |
4,398,046,511,104 |
2001:db8::/87 |
2001:db8:: |
2001:db8:0000:0000:0000:01ff:ffff:ffff |
2,199,023,255,552 |
2001:db8::/88 |
2001:db8:: |
2001:db8:0000:0000:0000:00ff:ffff:ffff |
1,099,511,627,776 |
2001:db8::/89 |
2001:db8:: |
2001:db8:0000:0000:0000:007f:ffff:ffff |
549,755,813,888 |
2001:db8::/90 |
2001:db8:: |
2001:db8:0000:0000:0000:003f:ffff:ffff |
274,877,906,944 |
2001:db8::/91 |
2001:db8:: |
2001:db8:0000:0000:0000:001f:ffff:ffff |
137,438,953,472 |
2001:db8::/92 |
2001:db8:: |
2001:db8:0000:0000:0000:000f:ffff:ffff |
68,719,476,736 |
2001:db8::/93 |
2001:db8:: |
2001:db8:0000:0000:0000:0007:ffff:ffff |
34,359,738,368 |
2001:db8::/94 |
2001:db8:: |
2001:db8:0000:0000:0000:0003:ffff:ffff |
17,179,869,184 |
2001:db8::/95 |
2001:db8:: |
2001:db8:0000:0000:0000:0001:ffff:ffff |
8,589,934,592 |
2001:db8::/96 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:ffff:ffff |
4,294,967,296 |
2001:db8::/97 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:7fff:ffff |
2,147,483,648 |
2001:db8::/98 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:3fff:ffff |
1,073,741,824 |
2001:db8::/99 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:1fff:ffff |
536,870,912 |
2001:db8::/100 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0fff:ffff |
268,435,456 |
2001:db8::/101 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:07ff:ffff |
134,217,728 |
2001:db8::/102 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:03ff:ffff |
67,108,864 |
2001:db8::/103 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:01ff:ffff |
33,554,432 |
2001:db8::/104 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:00ff:ffff |
16,777,216 |
2001:db8::/105 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:007f:ffff |
8,388,608 |
2001:db8::/106 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:003f:ffff |
4,194,304 |
2001:db8::/107 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:001f:ffff |
2,097,152 |
2001:db8::/108 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:000f:ffff |
1,048,576 |
2001:db8::/109 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0007:ffff |
524,288 |
2001:db8::/110 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0003:ffff |
262,144 |
2001:db8::/111 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0001:ffff |
131,072 |
2001:db8::/112 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:ffff |
65,536 |
2001:db8::/113 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:7fff |
32,768 |
2001:db8::/114 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:3fff |
16,384 |
2001:db8::/115 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:1fff |
8,192 |
2001:db8::/116 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:0fff |
4,096 |
2001:db8::/117 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:07ff |
2,048 |
2001:db8::/118 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:03ff |
1,024 |
2001:db8::/119 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:01ff |
512 |
2001:db8::/120 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:00ff |
256 |
2001:db8::/121 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:007f |
128 |
2001:db8::/122 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:003f |
64 |
2001:db8::/123 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:001f |
32 |
2001:db8::/124 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:000f |
16 |
2001:db8::/125 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:0007 |
8 |
2001:db8::/126 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:0003 |
4 |
2001:db8::/127 |
2001:db8:: |
2001:db8:0000:0000:0000:0000:0000:0001 |
2 |
2001:db8::/128 |
2001:db8:: |
2001:db8:: |
1 |
- |
|
