http://www.potato-people.com/blog Code, photos and ramblings of Rick Hodger Fri, 27 Aug 2010 09:56:59 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 http://www.potato-people.com/blog/2009/02/ipv6-subnet-size-reference-table/ http://www.potato-people.com/blog/2009/02/ipv6-subnet-size-reference-table/#comments Wed, 18 Feb 2009 10:43:27 +0000 rick http://www.potato-people.com/blog/?p=40 More numbers than you can shake a stick at. Just to give you an idea, at the ISP level (/32) that’s 79 septillion IP addresses assigned. That number is so big I had to go look it up on Wikipedia to find out what it’s called. Every home user will have 18 quntillion addresses at his disposal – I don’t have 18 quntillion pieces of lint  in my house, let alone a desire to connect every single one to the internet!

CIDR Subnet	Nos. 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	36,028,797,018,963,970
/72	72,057,594,037,927,940
/71	144,115,188,075,855,870
/70	288,230,376,151,711,750
/69	576,460,752,303,423,500
/68	1,152,921,504,606,847,000
/67	2,305,843,009,213,694,000
/66	4,611,686,018,427,388,000
/65	9,223,372,036,854,776,000
Residential – /64	18,446,744,073,709,552,000
/63	36,893,488,147,419,105,000
/62	73,786,976,294,838,210,000
/61	147,573,952,589,676,420,000
/60	295,147,905,179,352,850,000
/59	590,295,810,358,705,700,000
/58	1,180,591,620,717,411,500,000
/57	2,361,183,241,434,823,000,000
/56	4,722,366,482,869,646,000,000
/55	9,444,732,965,739,292,000,000
/54	18,889,465,931,478,585,000,000
/53	37,778,931,862,957,170,000,000
/52	75,557,863,725,914,340,000,000
/51	151,115,727,451,828,670,000,000
/50	302,231,454,903,657,350,000,000
/49	604,462,909,807,314,700,000,000
Business – /48	1,208,925,819,614,629,500,000,000
/47	2,417,851,639,229,259,000,000,000
/46	4,835,703,278,458,518,000,000,000
/45	9,671,406,556,917,036,000,000,000
/44	19,342,813,113,834,072,000,000,000
/43	38,685,626,227,668,145,000,000,000
/42	77,371,252,455,336,290,000,000,000
/41	154,742,504,910,672,570,000,000,000
/40	309,485,009,821,345,150,000,000,000
/39	618,970,019,642,690,200,000,000,000
/38	1,237,940,039,285,380,500,000,000,000
/37	2,475,880,078,570,761,000,000,000,000
/36	4,951,760,157,141,522,000,000,000,000
/35	9,903,520,314,283,044,000,000,000,000
/34	19,807,040,628,566,087,000,000,000,000
/33	39,614,081,257,132,175,000,000,000,000
ISP – /32	79,228,162,514,264,350,000,000,000,000
/31	158,456,325,028,528,700,000,000,000,000
/30	316,912,650,057,057,400,000,000,000,000
/29	633,825,300,114,114,700,000,000,000,000
/28	1,267,650,600,228,229,500,000,000,000,000
/27	2,535,301,200,456,459,000,000,000,000,000
/26	5,070,602,400,912,918,000,000,000,000,000
/25	10,141,204,801,825,836,000,000,000,000,000
/24	20,282,409,603,651,672,000,000,000,000,000
/23	40,564,819,207,303,345,000,000,000,000,000
/22	81,129,638,414,606,690,000,000,000,000,000
/21	162,259,276,829,213,370,000,000,000,000,000
/20	324,518,553,658,426,750,000,000,000,000,000
/19	649,037,107,316,853,500,000,000,000,000,000
/18	1,298,074,214,633,707,000,000,000,000,000,000
/17	2,596,148,429,267,414,000,000,000,000,000,000
/16	5,192,296,858,534,828,000,000,000,000,000,000
/15	10,384,593,717,069,656,000,000,000,000,000,000
/14	20,769,187,434,139,312,000,000,000,000,000,000
/13	41,538,374,868,278,625,000,000,000,000,000,000
/12	83,076,749,736,557,250,000,000,000,000,000,000
/11	166,153,499,473,114,500,000,000,000,000,000,000
/10	332,306,998,946,229,000,000,000,000,000,000,000
/9	664,613,997,892,458,000,000,000,000,000,000,000
/8	1,329,227,995,784,916,000,000,000,000,000,000,000

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