การคำนวนหาเลข IP เครื่อง

/26= 2^2 = 4 และ/2^6=64
11111111.11111111.11111111.11000000
มีตารางดังนี้
.......................Subnet/Network...............Broadcast.......................IP Usage
0..00000000............0................................63...................................1-63.....
1..01000000.............64..............................127..................................65-126..
2..10000000.............128.............................191.................................129-190..
3..11000000..............192.............................255................................193-254..

/27=2^3=8และ /2^5=32
11111111.11111111.11111111.11100000
มีตารางดังนี้
.........................Subnet/Network..................Broadcast......................IP Usage..
0...00000000...............0.....................................31.................................. 1-30..
1...00000001.................32..................................63...................................33-62.
2...00000010................64...................................95..................................65-94.
3...00000011.................96...................................127...............................97-126.
4...00000100.................128................................159...............................129-158.
5...00000101..................160...............................181.................................161-180.
6...00000110...................182...............................213................................183-212.
7...00000111...................214................................245................................215-244.
..............................................................................................................................................



/28 = 2^4 =16 และ2^4=16
11111111.11111111.11111111.11110000
มีตารางดังต่อไปนี้
........................Subnet/Network..................Broadcast...................IPUsage
0...00000000............0...................................15..............................1-14......
1...00000001.............16..................................31..............................17-30....
2...00000010..............32................................63...............................33-62...
3...00000011..............64.................................79...............................65-78...
4...00000100..............80...............................95..................................81-94...
5...00000101...............96................................127...............................97-126...
6...00000110...............128................................159.............................129-154..
7...00000111...............160................................191...............................161-190...
8...00001000...............192................................207.............................192-206...
9...00001001...............208................................223..............................209-222..
10..00001010...............224...............................239.............................225-238..
11..00001011...............240...............................254..............................241-253..
12..00001100..............256................................271..............................254-270..
13..00001101.............272................................287................................273-286..
14..00001110...............288..............................303................................387-302..
15..00001111..................304...........................319...............................305-318..
16..00010000...............320.............................335..............................321-334..
...........................................................................................................
/29 = 2^5=32, 2^3=8
11111111.11111111.11111111.11111000
.......เลขฐาน ............Network ID..........broad cast.......IP Usage
0.....00000000.........0........................7..................1 -6
1.....00100000.........8.......................15.................9-14
2.....01000000.........16.....................23.................17-22
3.....01100000.........24.....................31.................25-30
4.....10000000.........32.....................39.................33-38
5.....10100000.........40.....................47.................41-46
6.....11000000.........48.....................55.................49-54
7.....11000000.........56.....................63.................57-62 8.....00001000.........64.....................71.................65-70
9.....00001001.........72.....................79.................73-78
10...00001010.........80.....................87................. 81-86
11...00001011.........88.....................95.................89-94
12...00001100.........96.....................103...............97-102
13...00001101........104....................111...............105-110
14...00001110........112....................119...............113-118
15...00001111........120....................127...............121-126
16...00010000........128....................135...............129-134
17...00010001........136....................143...............137-142
18...00010010........144....................151...............145-150
19...00010011........152....................159...............153-158
20...00010100........160....................167...............161-166
21...00010101........168....................175...............169-174
22...00010110........176....................183...............177-182
23...00010111........184....................191...............185-190
24...00011000........192....................199...............193-198
25...00011001........200....................207...............201-206
26...00011010........208....................215...............209-214
27...00011011........216....................223...............217-222
28...00011100........224....................231...............225-230
29...00011101........232....................239...............233-240
30...00011110........240....................247...............241-246
31...00011111........248....................255...............249-256



..........................................

/30.......255.255.255.252=2^6=64 และ 2^2=4
11111111.11111111.11111111.11111100
บิต........เลขฐานสอง...............Network ID............Broadcast..........IP Usage
0..........00000000.......................0............................3.........................1-2
1...........00000001.......................4............................7..........................5-6
2...........00000010.......................8...........................11.........................9-10
3...........00000011.......................12..........................15........................13-14
4...........00000100.......................16.........................19.........................17-18
5...........00000101........................20........................23.........................21-22
6...........00000110........................24........................27..........................25-26
7...........00000111.........................28........................31..........................29-30
8..........00001000.........................32........................35.........................33-34
9..........00001001..........................36.......................39.........................37-38
10........00001010..........................40.......................43.........................41-42
11.........00001011..........................44.......................47.........................45-46
12.........00001100.........................48.......................51..........................49-50
13.........00001101..........................52.......................55..........................53-54
14.........00001110..........................56......................59...........................57-58
15.........00001111..........................60.......................63...........................61-62
16.........00010000.........................64.......................67...........................65-66
17.........00010001..........................68.......................71...........................69-70
18........00010010...........................72.......................75...........................73-74
19........00010011...........................76.......................79...........................77-78
20.......00010100...........................80.......................83..........................81-82
21.......00010101............................84.......................87...........................85-86
22.......00010110............................88.......................91...........................89-90
23.......00010111............................92.......................95...........................93-94
24.......00011000...........................96.......................99...........................97-98
25.......00011001............................100....................103.........................101-102
26.......00011010............................104....................107..........................105-106
27.......00011011.............................108....................111..........................109-110
28.......00011100............................112.....................115.........................113-114
29.......00011101............................116......................119.........................117-118
30.......00011110............................120.....................123.........................121-122
31.......00011111.............................124.....................127..........................125-126
32.......00100000...........................128.....................131..........................129-130
33.......00100001............................132....................135..........................133-134
34.......00100010............................136....................139..........................137-138
35.......00100011.............................140...................143..........................141-142
36.......00100100............................144....................147..........................145-146
37.......00100101.............................148....................151..........................149-150
38.......00100110.............................152....................155.........................153-154
39.......00100111.............................156....................159.........................157-158
40......00101000.............................160....................163.........................161-162
41......00101001..............................164....................167..........................165-166
42......00101010..............................168....................171..........................169-170
43......00101011...............................172....................175..........................173-174
44......00101100...............................176...................179...........................177-178
45......00101101...............................180...................183...........................181-182
46......00101110...............................184....................187..........................185-186
47......00101111................................188....................191..........................189-190
48.....00110000...............................192....................195..........................193-194
49.....00110001...............................196.....................199.........................197-198
50.....00110010...............................200....................203.........................201-202
51......00110011...............................204....................207.........................205-206
52......00110100..............................208....................211..........................209-210
53......00110101...............................212....................215..........................213-214
54......00110110...............................216....................219..........................217-218
55......00110111...............................220....................223..........................221-222
56......00111000..............................224....................227...........................225-226
57.......00111001..............................228....................231...........................229-230
58.......00111010..............................232....................235..........................233-234
59.......00111011..............................236....................239..........................237-238
60.......00111100.............................240....................243..........................241-242
61.......00111101..............................244.....................247..........................245-246
62.......00111110..............................248.....................251..........................249-250
63.......00111111...............................252....................255..........................253-254