IP Address and Subnetting Guide - Allied Telesis
IP Address and Subnetting Guide
NETWORK ADDRESS RANGES BY CLASS
IP network addresses are issued as follows:
CLASS
RANGE
DEFAULT MASK
Class A Class B Class C
1-127 128-191 192-223
255.0.0.0 255.255.0.0 255.255.255.0
MAXIMUM NUMBER OF HOSTS BY CLASS
The maximum number of hosts is achieved by using the default subnet mask for each class (i.e. by having only one subnet).
CLASS
NO. OF ADDRESSES
Class A
224
Class B
216
Class C
28
16,777,216 65,536 256
BINARY CALCULATIONS
DECIMAL
20
1
21
2
22
4
23
8
24
16
25
32
26
64
27
128
BINARY
00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000
SUBNET MASKS - BINARY REPRESENTATIONS
DECIMAL
HEX
.128
80
.192
C0
.224
E0
.240
F0
.248
F8
.252
FC
.254
FE
.255
FF
BINARY
10000000 11000000 11100000 11110000 11111000 11111100 11111110 11111111
NO. OF BITS SUBNET MASK
NO. OF NO. OF HOSTS SUBNETS PER SUBNET
CLASS B
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CLASS C
1 2 3 4 5 6
255.255.128.0 255.255.192.0 255.255.224.0 255.255.240.0 255.255.248.0 255.255.252.0 255.255.254.0 255.255.255.0 255.255.255.128 255.255.255.192 255.255.255.224 255.255.255.240 255.255.255.248 255.255.255.252
2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384
255.255.255.128
2
255.255.255.192
4
255.255.255.224
8
255.255.255.240
16
255.255.255.248
32
255.255.255.252
64
32766 16382
8190 4094 2046 1022 510 254 126
62 30 14
6 2
126 62 30 14
6 2
IP ADDRESS RANGES FOR CLASS C SUBNETS
SUBNET SUBNET SUBNET ADDRESS
SUBNET SUBNET SUBNET ADDRESS
MASK
NO. ADDRESS RANGE B'CAST MASK
NO.
ADDRESS RANGE B'CAST
Number of bits for Class C networks -- 24 bit mask = 255.255.255.0, 32 bit mask = 255.255.255.255.
USABLE SUBNETS AND ADDRESSES The top and bottom host numbers of any subnet may not be used.The bottom number is the subnet address and the top number is the broadcast address for the subnet.
128
0
(25 bits)
1
192
0
(26 bits)
1
2
3
224
0
(27 bits)
1
2
3
4
5
6
7
240
0
(28 bits)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
248
0
(29 bits)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
1-126
127
252
0
128
129-254 255
(30 bits)
1
2
0
1-62 63
3
64
65-126 127
4
128 129-190 191
5
192 193-254 255
6
0
1-30 31
7
32
33-62 63
8
64
65-94 95
9
96
97-126 127
10
128 129-158 159
11
160 161-190 191
12
192 193-222 223
13
224 225-254 255
14
15
0
1-14 15
16
16
17-30 31
17
32
33-46 47
18
48
49-62 63
19
64
65-78 79
20
80
81-94 95
21
96
97-110 111
22
112 113-126 127
23
128 129-142 143
24
144 145-158 159
25
160 161-174 175
26
176 177-190 191
27
192 193-206 207
28
208 209-222 223
29
224 225-238 239
30
240 241-254 255
31
0
1-6
7
32
8
9-14 15
33
16
17-22 23
34
24
25-30 31
35
32
33-38 39
36
40
41-46 47
37
48
49-54 55
38
56
57-62 63
39
64
65-70 71
40
72
73-78 79
41
80
81-86 87
42
88
89-94 95
43
96
97-102 103
44
104 105-110 111
45
112 113-118 119
46
120 121-126 127
47
128 129-134 135
48
136 137-142 143
49
144 145-150 151
50
152 153-158 159
51
160 161-166 167
52
168 169-174 175
53
176 177-182 183
54
184 185-190 191
55
192 193-198 199
56
200 201-206 207
57
208 209-214 215
58
216 217-222 223
59
224 225-230 231
60
232 233-238 239
61
240 241-246 247
62
248 249-254 255
63
0
1-2
3
4
5-6
7
8
9-10 11
12
13-14 15
16
17-18 19
20
21-22 23
24
25-26 27
28
29-30 31
32
33-34 35
36
37-38 39
40
41-42 43
44
45-46 47
48
49-50 51
52
53-54 55
56
57-58 59
60
61-62 63
64
65-66 67
68
69-70 71
72
73-74 75
76
77-78 79
80
81-82 83
84
85-86 87
88
89-90 91
92
93-94 95
96
97-98 99
100
101-102 103
104
105-106 107
108
109-110 111
112
113-114 115
116
117-118 119
120
121-122 123
124
125-126 127
128
129-130 131
132
133-134 135
136
137-138 139
140
141-142 143
144
145-146 147
148
149-150 151
152
153-154 155
156
157-158 159
160
161-162 163
164
165-166 167
168
169-170 171
172
173-174 175
176
177-178 179
180
181-182 183
184
185-186 187
188
189-190 191
192
193-194 195
196
197-198 199
200
201-202 203
204
205-206 207
208
209-210 211
212
213-214 215
216
217-218 219
220
221-222 223
224
225-226 227
228
229-230 231
232
233-234 235
236
237-238 239
240
241-242 243
244
245-246 247
248
249-250 251
252
253-254 255
North America Headquarters | 19800 North Creek Parkway | Suite 100 | Bothell | WA 98011 | USA | T: +1 800 424 4284 | F: +1 425 481 3895 Asia-Pacific Headquarters | 11 Tai Seng Link | Singapore | 534182 | T: +65 6383 3832 | F: +65 6383 3830 EMEA & CSA Operations | Incheonweg 7 | 1437 EK Rozenburg | The Netherlands | T: +31 20 7950020 | F: +31 20 7950021
? 2014 Allied Telesis, Inc. All rights reserved. Information in this document is subject to change without notice. All company names, logos, and product designs that are trademarks or registered trademarks are the property of their respective owners.
C617-21003-00 RevF
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