IP Addressing with Class C Subnets

Length
Mask
24
255.255.255.0
25
255.255.255.128
26
255.255.255.192
27
255.255.255.224
28
255.255.255.240
29
255.255.255.248
30
255.255.255.252

Class C Subnet Length 24
Subnet
Host
Addresses
Broadcast
Address
0
1-254
255

Class C Subnet Length 25
Subnet
Host
Addresses
Broadcast
Address
0
1-126
127
128
129-254
255

Class C Subnet Length 26
Subnet
Host
Addresses
Broadcast
Address
0
1-62
63
64
65-126
127
128
129-190
191
192
193-254
255

Class C Subnet Length 27
Subnet
Host
Addresses
Broadcast
Address
 Subnet Host
Addresses		 Broadcast
Address
0
1-30
31
128
129-158
159
32
33-62
63
160
161-190
191
64
65-94
95
192
193-222
223
96
97-126
127
224
225-254
255

Class C Subnet Length 28
Subnet
Host
Addresses
Broadcast
Address
Subnet
Host
Addresses
Broadcast
Address
0
1-14
15
128
129-142
143
16
17-30
31
144
145-158
159
32
33-46
47
160
161-174
175
48
49-62
63
176
177-190
191
64
65-78
79
192
193-206
207
80
81-94
95
208
209-222
223
96
97-110
111
224
225-238
239
112
113-126
127
240
241-254
255

Class C Subnet Length 29
Subnet
Host
Addresses
Broadcast
Address
Subnet
Host
Addresses
Broadcast
Address
0
1-6
7
128
129-134
135
8
9-14
15
136
137-142
143
16
17-22
23
144
145-150
151
24
25-30
31
152
153-158
159
32
33-38
39
160
161-166
167
40
41-46
47
168
169-174
175
48
49-54
55
176
177-182
183
56
57-62
63
184
185-190
191
64
65-70
71
192
193-198
199
72
73-78
79
200
201-206
207
80
81-86
87
208
209-214
215
88
89-94
95
216
217-222
223
96
97-102
103
224
225-230
231
104
105-110
111
232
233-238
239
112
113-118
119
240
241-246
247
120
121-126
127
248
249-254
255

Class C Subnet Length 30
Subnet
Host
Addresses
Broadcast
Address
Subnet
Host
Addresses
Broadcast
Address
0
1-2
3
128
129-130
131
4
5-6
7
132
133-134
135
8
9-10
11
136
137-138
139
12
13-14
15
140
141-142
143
16
17-18
19
144
145-146
147
20
21-22
23
148
149-150
151
24
25-26
27
152
153-154
155
28
29-30
31
156
157-158
159
32
33-34
35
160
161-162
163
36
37-38
39
164
165-166
167
40
41-42
43
168
169-170
171
44
45-46
47
172
173-174
175
48
49-50
51
176
177-178
179
52
53-54
55
180
181-182
183
56
57-58
59
184
185-186
187
60
61-62
63
188
189-190
191
64
65-66
67
192
193-194
195
68
69-70
71
196
197-198
199
72
71-72
73
200
201-202
203
76
77-78
79
204
205-206
207
80
81-82
83
208
209-210
211
84
85-86
87
212
213-214
215
88
89-90
91
216
217-218
219
92
93-94
95
220
221-222
223
96
97-98
99
224
225-226
227
100
101-102
103
228
229-230
231
104
105-106
107
232
233-234
235
108
109-110
111
236
237-238
239
112
113-114
115
240
241-242
243
116
117-118
119
244
245-246
247
120
121-122
123
248
249-250
251
124
125-126
127
252
253-254
255

Comments to Larry Lang