IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.0.108.0/23

network10.0.108.0/23

broadcast10.0.109.255

first host10.0.108.1

last host10.0.109.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.108.0/23

address00001010.00000000.01101100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.01101100.00000000

broadcast00001010.00000000.01101101.11111111

green = network part, grey = host part

hex0x0a006c00

decimal167799808

reverse dns0.108.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:6c00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.108.0/31	10.0.108.0 – 10.0.108.1	10.0.108.1
2	10.0.108.2/31	10.0.108.2 – 10.0.108.3	10.0.108.3
3	10.0.108.4/31	10.0.108.4 – 10.0.108.5	10.0.108.5
4	10.0.108.6/31	10.0.108.6 – 10.0.108.7	10.0.108.7
5	10.0.108.8/31	10.0.108.8 – 10.0.108.9	10.0.108.9
6	10.0.108.10/31	10.0.108.10 – 10.0.108.11	10.0.108.11
7	10.0.108.12/31	10.0.108.12 – 10.0.108.13	10.0.108.13
8	10.0.108.14/31	10.0.108.14 – 10.0.108.15	10.0.108.15
9	10.0.108.16/31	10.0.108.16 – 10.0.108.17	10.0.108.17
10	10.0.108.18/31	10.0.108.18 – 10.0.108.19	10.0.108.19
11	10.0.108.20/31	10.0.108.20 – 10.0.108.21	10.0.108.21
12	10.0.108.22/31	10.0.108.22 – 10.0.108.23	10.0.108.23
13	10.0.108.24/31	10.0.108.24 – 10.0.108.25	10.0.108.25
14	10.0.108.26/31	10.0.108.26 – 10.0.108.27	10.0.108.27
15	10.0.108.28/31	10.0.108.28 – 10.0.108.29	10.0.108.29
16	10.0.108.30/31	10.0.108.30 – 10.0.108.31	10.0.108.31
17	10.0.108.32/31	10.0.108.32 – 10.0.108.33	10.0.108.33
18	10.0.108.34/31	10.0.108.34 – 10.0.108.35	10.0.108.35
19	10.0.108.36/31	10.0.108.36 – 10.0.108.37	10.0.108.37
20	10.0.108.38/31	10.0.108.38 – 10.0.108.39	10.0.108.39
21	10.0.108.40/31	10.0.108.40 – 10.0.108.41	10.0.108.41
22	10.0.108.42/31	10.0.108.42 – 10.0.108.43	10.0.108.43
23	10.0.108.44/31	10.0.108.44 – 10.0.108.45	10.0.108.45
24	10.0.108.46/31	10.0.108.46 – 10.0.108.47	10.0.108.47
25	10.0.108.48/31	10.0.108.48 – 10.0.108.49	10.0.108.49
26	10.0.108.50/31	10.0.108.50 – 10.0.108.51	10.0.108.51
27	10.0.108.52/31	10.0.108.52 – 10.0.108.53	10.0.108.53
28	10.0.108.54/31	10.0.108.54 – 10.0.108.55	10.0.108.55
29	10.0.108.56/31	10.0.108.56 – 10.0.108.57	10.0.108.57
30	10.0.108.58/31	10.0.108.58 – 10.0.108.59	10.0.108.59
31	10.0.108.60/31	10.0.108.60 – 10.0.108.61	10.0.108.61
32	10.0.108.62/31	10.0.108.62 – 10.0.108.63	10.0.108.63
33	10.0.108.64/31	10.0.108.64 – 10.0.108.65	10.0.108.65
34	10.0.108.66/31	10.0.108.66 – 10.0.108.67	10.0.108.67
35	10.0.108.68/31	10.0.108.68 – 10.0.108.69	10.0.108.69
36	10.0.108.70/31	10.0.108.70 – 10.0.108.71	10.0.108.71
37	10.0.108.72/31	10.0.108.72 – 10.0.108.73	10.0.108.73
38	10.0.108.74/31	10.0.108.74 – 10.0.108.75	10.0.108.75
39	10.0.108.76/31	10.0.108.76 – 10.0.108.77	10.0.108.77
40	10.0.108.78/31	10.0.108.78 – 10.0.108.79	10.0.108.79
41	10.0.108.80/31	10.0.108.80 – 10.0.108.81	10.0.108.81
42	10.0.108.82/31	10.0.108.82 – 10.0.108.83	10.0.108.83
43	10.0.108.84/31	10.0.108.84 – 10.0.108.85	10.0.108.85
44	10.0.108.86/31	10.0.108.86 – 10.0.108.87	10.0.108.87
45	10.0.108.88/31	10.0.108.88 – 10.0.108.89	10.0.108.89
46	10.0.108.90/31	10.0.108.90 – 10.0.108.91	10.0.108.91
47	10.0.108.92/31	10.0.108.92 – 10.0.108.93	10.0.108.93
48	10.0.108.94/31	10.0.108.94 – 10.0.108.95	10.0.108.95
49	10.0.108.96/31	10.0.108.96 – 10.0.108.97	10.0.108.97
50	10.0.108.98/31	10.0.108.98 – 10.0.108.99	10.0.108.99
51	10.0.108.100/31	10.0.108.100 – 10.0.108.101	10.0.108.101
52	10.0.108.102/31	10.0.108.102 – 10.0.108.103	10.0.108.103
53	10.0.108.104/31	10.0.108.104 – 10.0.108.105	10.0.108.105
54	10.0.108.106/31	10.0.108.106 – 10.0.108.107	10.0.108.107
55	10.0.108.108/31	10.0.108.108 – 10.0.108.109	10.0.108.109
56	10.0.108.110/31	10.0.108.110 – 10.0.108.111	10.0.108.111
57	10.0.108.112/31	10.0.108.112 – 10.0.108.113	10.0.108.113
58	10.0.108.114/31	10.0.108.114 – 10.0.108.115	10.0.108.115
59	10.0.108.116/31	10.0.108.116 – 10.0.108.117	10.0.108.117
60	10.0.108.118/31	10.0.108.118 – 10.0.108.119	10.0.108.119
61	10.0.108.120/31	10.0.108.120 – 10.0.108.121	10.0.108.121
62	10.0.108.122/31	10.0.108.122 – 10.0.108.123	10.0.108.123
63	10.0.108.124/31	10.0.108.124 – 10.0.108.125	10.0.108.125
64	10.0.108.126/31	10.0.108.126 – 10.0.108.127	10.0.108.127
65	10.0.108.128/31	10.0.108.128 – 10.0.108.129	10.0.108.129
66	10.0.108.130/31	10.0.108.130 – 10.0.108.131	10.0.108.131
67	10.0.108.132/31	10.0.108.132 – 10.0.108.133	10.0.108.133
68	10.0.108.134/31	10.0.108.134 – 10.0.108.135	10.0.108.135
69	10.0.108.136/31	10.0.108.136 – 10.0.108.137	10.0.108.137
70	10.0.108.138/31	10.0.108.138 – 10.0.108.139	10.0.108.139
71	10.0.108.140/31	10.0.108.140 – 10.0.108.141	10.0.108.141
72	10.0.108.142/31	10.0.108.142 – 10.0.108.143	10.0.108.143
73	10.0.108.144/31	10.0.108.144 – 10.0.108.145	10.0.108.145
74	10.0.108.146/31	10.0.108.146 – 10.0.108.147	10.0.108.147
75	10.0.108.148/31	10.0.108.148 – 10.0.108.149	10.0.108.149
76	10.0.108.150/31	10.0.108.150 – 10.0.108.151	10.0.108.151
77	10.0.108.152/31	10.0.108.152 – 10.0.108.153	10.0.108.153
78	10.0.108.154/31	10.0.108.154 – 10.0.108.155	10.0.108.155
79	10.0.108.156/31	10.0.108.156 – 10.0.108.157	10.0.108.157
80	10.0.108.158/31	10.0.108.158 – 10.0.108.159	10.0.108.159
81	10.0.108.160/31	10.0.108.160 – 10.0.108.161	10.0.108.161
82	10.0.108.162/31	10.0.108.162 – 10.0.108.163	10.0.108.163
83	10.0.108.164/31	10.0.108.164 – 10.0.108.165	10.0.108.165
84	10.0.108.166/31	10.0.108.166 – 10.0.108.167	10.0.108.167
85	10.0.108.168/31	10.0.108.168 – 10.0.108.169	10.0.108.169
86	10.0.108.170/31	10.0.108.170 – 10.0.108.171	10.0.108.171
87	10.0.108.172/31	10.0.108.172 – 10.0.108.173	10.0.108.173
88	10.0.108.174/31	10.0.108.174 – 10.0.108.175	10.0.108.175
89	10.0.108.176/31	10.0.108.176 – 10.0.108.177	10.0.108.177
90	10.0.108.178/31	10.0.108.178 – 10.0.108.179	10.0.108.179
91	10.0.108.180/31	10.0.108.180 – 10.0.108.181	10.0.108.181
92	10.0.108.182/31	10.0.108.182 – 10.0.108.183	10.0.108.183
93	10.0.108.184/31	10.0.108.184 – 10.0.108.185	10.0.108.185
94	10.0.108.186/31	10.0.108.186 – 10.0.108.187	10.0.108.187
95	10.0.108.188/31	10.0.108.188 – 10.0.108.189	10.0.108.189
96	10.0.108.190/31	10.0.108.190 – 10.0.108.191	10.0.108.191
97	10.0.108.192/31	10.0.108.192 – 10.0.108.193	10.0.108.193
98	10.0.108.194/31	10.0.108.194 – 10.0.108.195	10.0.108.195
99	10.0.108.196/31	10.0.108.196 – 10.0.108.197	10.0.108.197
100	10.0.108.198/31	10.0.108.198 – 10.0.108.199	10.0.108.199
101	10.0.108.200/31	10.0.108.200 – 10.0.108.201	10.0.108.201
102	10.0.108.202/31	10.0.108.202 – 10.0.108.203	10.0.108.203
103	10.0.108.204/31	10.0.108.204 – 10.0.108.205	10.0.108.205
104	10.0.108.206/31	10.0.108.206 – 10.0.108.207	10.0.108.207
105	10.0.108.208/31	10.0.108.208 – 10.0.108.209	10.0.108.209
106	10.0.108.210/31	10.0.108.210 – 10.0.108.211	10.0.108.211
107	10.0.108.212/31	10.0.108.212 – 10.0.108.213	10.0.108.213
108	10.0.108.214/31	10.0.108.214 – 10.0.108.215	10.0.108.215
109	10.0.108.216/31	10.0.108.216 – 10.0.108.217	10.0.108.217
110	10.0.108.218/31	10.0.108.218 – 10.0.108.219	10.0.108.219
111	10.0.108.220/31	10.0.108.220 – 10.0.108.221	10.0.108.221
112	10.0.108.222/31	10.0.108.222 – 10.0.108.223	10.0.108.223
113	10.0.108.224/31	10.0.108.224 – 10.0.108.225	10.0.108.225
114	10.0.108.226/31	10.0.108.226 – 10.0.108.227	10.0.108.227
115	10.0.108.228/31	10.0.108.228 – 10.0.108.229	10.0.108.229
116	10.0.108.230/31	10.0.108.230 – 10.0.108.231	10.0.108.231
117	10.0.108.232/31	10.0.108.232 – 10.0.108.233	10.0.108.233
118	10.0.108.234/31	10.0.108.234 – 10.0.108.235	10.0.108.235
119	10.0.108.236/31	10.0.108.236 – 10.0.108.237	10.0.108.237
120	10.0.108.238/31	10.0.108.238 – 10.0.108.239	10.0.108.239
121	10.0.108.240/31	10.0.108.240 – 10.0.108.241	10.0.108.241
122	10.0.108.242/31	10.0.108.242 – 10.0.108.243	10.0.108.243
123	10.0.108.244/31	10.0.108.244 – 10.0.108.245	10.0.108.245
124	10.0.108.246/31	10.0.108.246 – 10.0.108.247	10.0.108.247
125	10.0.108.248/31	10.0.108.248 – 10.0.108.249	10.0.108.249
126	10.0.108.250/31	10.0.108.250 – 10.0.108.251	10.0.108.251
127	10.0.108.252/31	10.0.108.252 – 10.0.108.253	10.0.108.253
128	10.0.108.254/31	10.0.108.254 – 10.0.108.255	10.0.108.255
129	10.0.109.0/31	10.0.109.0 – 10.0.109.1	10.0.109.1
130	10.0.109.2/31	10.0.109.2 – 10.0.109.3	10.0.109.3
131	10.0.109.4/31	10.0.109.4 – 10.0.109.5	10.0.109.5
132	10.0.109.6/31	10.0.109.6 – 10.0.109.7	10.0.109.7
133	10.0.109.8/31	10.0.109.8 – 10.0.109.9	10.0.109.9
134	10.0.109.10/31	10.0.109.10 – 10.0.109.11	10.0.109.11
135	10.0.109.12/31	10.0.109.12 – 10.0.109.13	10.0.109.13
136	10.0.109.14/31	10.0.109.14 – 10.0.109.15	10.0.109.15
137	10.0.109.16/31	10.0.109.16 – 10.0.109.17	10.0.109.17
138	10.0.109.18/31	10.0.109.18 – 10.0.109.19	10.0.109.19
139	10.0.109.20/31	10.0.109.20 – 10.0.109.21	10.0.109.21
140	10.0.109.22/31	10.0.109.22 – 10.0.109.23	10.0.109.23
141	10.0.109.24/31	10.0.109.24 – 10.0.109.25	10.0.109.25
142	10.0.109.26/31	10.0.109.26 – 10.0.109.27	10.0.109.27
143	10.0.109.28/31	10.0.109.28 – 10.0.109.29	10.0.109.29
144	10.0.109.30/31	10.0.109.30 – 10.0.109.31	10.0.109.31
145	10.0.109.32/31	10.0.109.32 – 10.0.109.33	10.0.109.33
146	10.0.109.34/31	10.0.109.34 – 10.0.109.35	10.0.109.35
147	10.0.109.36/31	10.0.109.36 – 10.0.109.37	10.0.109.37
148	10.0.109.38/31	10.0.109.38 – 10.0.109.39	10.0.109.39
149	10.0.109.40/31	10.0.109.40 – 10.0.109.41	10.0.109.41
150	10.0.109.42/31	10.0.109.42 – 10.0.109.43	10.0.109.43
151	10.0.109.44/31	10.0.109.44 – 10.0.109.45	10.0.109.45
152	10.0.109.46/31	10.0.109.46 – 10.0.109.47	10.0.109.47
153	10.0.109.48/31	10.0.109.48 – 10.0.109.49	10.0.109.49
154	10.0.109.50/31	10.0.109.50 – 10.0.109.51	10.0.109.51
155	10.0.109.52/31	10.0.109.52 – 10.0.109.53	10.0.109.53
156	10.0.109.54/31	10.0.109.54 – 10.0.109.55	10.0.109.55
157	10.0.109.56/31	10.0.109.56 – 10.0.109.57	10.0.109.57
158	10.0.109.58/31	10.0.109.58 – 10.0.109.59	10.0.109.59
159	10.0.109.60/31	10.0.109.60 – 10.0.109.61	10.0.109.61
160	10.0.109.62/31	10.0.109.62 – 10.0.109.63	10.0.109.63
161	10.0.109.64/31	10.0.109.64 – 10.0.109.65	10.0.109.65
162	10.0.109.66/31	10.0.109.66 – 10.0.109.67	10.0.109.67
163	10.0.109.68/31	10.0.109.68 – 10.0.109.69	10.0.109.69
164	10.0.109.70/31	10.0.109.70 – 10.0.109.71	10.0.109.71
165	10.0.109.72/31	10.0.109.72 – 10.0.109.73	10.0.109.73
166	10.0.109.74/31	10.0.109.74 – 10.0.109.75	10.0.109.75
167	10.0.109.76/31	10.0.109.76 – 10.0.109.77	10.0.109.77
168	10.0.109.78/31	10.0.109.78 – 10.0.109.79	10.0.109.79
169	10.0.109.80/31	10.0.109.80 – 10.0.109.81	10.0.109.81
170	10.0.109.82/31	10.0.109.82 – 10.0.109.83	10.0.109.83
171	10.0.109.84/31	10.0.109.84 – 10.0.109.85	10.0.109.85
172	10.0.109.86/31	10.0.109.86 – 10.0.109.87	10.0.109.87
173	10.0.109.88/31	10.0.109.88 – 10.0.109.89	10.0.109.89
174	10.0.109.90/31	10.0.109.90 – 10.0.109.91	10.0.109.91
175	10.0.109.92/31	10.0.109.92 – 10.0.109.93	10.0.109.93
176	10.0.109.94/31	10.0.109.94 – 10.0.109.95	10.0.109.95
177	10.0.109.96/31	10.0.109.96 – 10.0.109.97	10.0.109.97
178	10.0.109.98/31	10.0.109.98 – 10.0.109.99	10.0.109.99
179	10.0.109.100/31	10.0.109.100 – 10.0.109.101	10.0.109.101
180	10.0.109.102/31	10.0.109.102 – 10.0.109.103	10.0.109.103
181	10.0.109.104/31	10.0.109.104 – 10.0.109.105	10.0.109.105
182	10.0.109.106/31	10.0.109.106 – 10.0.109.107	10.0.109.107
183	10.0.109.108/31	10.0.109.108 – 10.0.109.109	10.0.109.109
184	10.0.109.110/31	10.0.109.110 – 10.0.109.111	10.0.109.111
185	10.0.109.112/31	10.0.109.112 – 10.0.109.113	10.0.109.113
186	10.0.109.114/31	10.0.109.114 – 10.0.109.115	10.0.109.115
187	10.0.109.116/31	10.0.109.116 – 10.0.109.117	10.0.109.117
188	10.0.109.118/31	10.0.109.118 – 10.0.109.119	10.0.109.119
189	10.0.109.120/31	10.0.109.120 – 10.0.109.121	10.0.109.121
190	10.0.109.122/31	10.0.109.122 – 10.0.109.123	10.0.109.123
191	10.0.109.124/31	10.0.109.124 – 10.0.109.125	10.0.109.125
192	10.0.109.126/31	10.0.109.126 – 10.0.109.127	10.0.109.127
193	10.0.109.128/31	10.0.109.128 – 10.0.109.129	10.0.109.129
194	10.0.109.130/31	10.0.109.130 – 10.0.109.131	10.0.109.131
195	10.0.109.132/31	10.0.109.132 – 10.0.109.133	10.0.109.133
196	10.0.109.134/31	10.0.109.134 – 10.0.109.135	10.0.109.135
197	10.0.109.136/31	10.0.109.136 – 10.0.109.137	10.0.109.137
198	10.0.109.138/31	10.0.109.138 – 10.0.109.139	10.0.109.139
199	10.0.109.140/31	10.0.109.140 – 10.0.109.141	10.0.109.141
200	10.0.109.142/31	10.0.109.142 – 10.0.109.143	10.0.109.143
201	10.0.109.144/31	10.0.109.144 – 10.0.109.145	10.0.109.145
202	10.0.109.146/31	10.0.109.146 – 10.0.109.147	10.0.109.147
203	10.0.109.148/31	10.0.109.148 – 10.0.109.149	10.0.109.149
204	10.0.109.150/31	10.0.109.150 – 10.0.109.151	10.0.109.151
205	10.0.109.152/31	10.0.109.152 – 10.0.109.153	10.0.109.153
206	10.0.109.154/31	10.0.109.154 – 10.0.109.155	10.0.109.155
207	10.0.109.156/31	10.0.109.156 – 10.0.109.157	10.0.109.157
208	10.0.109.158/31	10.0.109.158 – 10.0.109.159	10.0.109.159
209	10.0.109.160/31	10.0.109.160 – 10.0.109.161	10.0.109.161
210	10.0.109.162/31	10.0.109.162 – 10.0.109.163	10.0.109.163
211	10.0.109.164/31	10.0.109.164 – 10.0.109.165	10.0.109.165
212	10.0.109.166/31	10.0.109.166 – 10.0.109.167	10.0.109.167
213	10.0.109.168/31	10.0.109.168 – 10.0.109.169	10.0.109.169
214	10.0.109.170/31	10.0.109.170 – 10.0.109.171	10.0.109.171
215	10.0.109.172/31	10.0.109.172 – 10.0.109.173	10.0.109.173
216	10.0.109.174/31	10.0.109.174 – 10.0.109.175	10.0.109.175
217	10.0.109.176/31	10.0.109.176 – 10.0.109.177	10.0.109.177
218	10.0.109.178/31	10.0.109.178 – 10.0.109.179	10.0.109.179
219	10.0.109.180/31	10.0.109.180 – 10.0.109.181	10.0.109.181
220	10.0.109.182/31	10.0.109.182 – 10.0.109.183	10.0.109.183
221	10.0.109.184/31	10.0.109.184 – 10.0.109.185	10.0.109.185
222	10.0.109.186/31	10.0.109.186 – 10.0.109.187	10.0.109.187
223	10.0.109.188/31	10.0.109.188 – 10.0.109.189	10.0.109.189
224	10.0.109.190/31	10.0.109.190 – 10.0.109.191	10.0.109.191
225	10.0.109.192/31	10.0.109.192 – 10.0.109.193	10.0.109.193
226	10.0.109.194/31	10.0.109.194 – 10.0.109.195	10.0.109.195
227	10.0.109.196/31	10.0.109.196 – 10.0.109.197	10.0.109.197
228	10.0.109.198/31	10.0.109.198 – 10.0.109.199	10.0.109.199
229	10.0.109.200/31	10.0.109.200 – 10.0.109.201	10.0.109.201
230	10.0.109.202/31	10.0.109.202 – 10.0.109.203	10.0.109.203
231	10.0.109.204/31	10.0.109.204 – 10.0.109.205	10.0.109.205
232	10.0.109.206/31	10.0.109.206 – 10.0.109.207	10.0.109.207
233	10.0.109.208/31	10.0.109.208 – 10.0.109.209	10.0.109.209
234	10.0.109.210/31	10.0.109.210 – 10.0.109.211	10.0.109.211
235	10.0.109.212/31	10.0.109.212 – 10.0.109.213	10.0.109.213
236	10.0.109.214/31	10.0.109.214 – 10.0.109.215	10.0.109.215
237	10.0.109.216/31	10.0.109.216 – 10.0.109.217	10.0.109.217
238	10.0.109.218/31	10.0.109.218 – 10.0.109.219	10.0.109.219
239	10.0.109.220/31	10.0.109.220 – 10.0.109.221	10.0.109.221
240	10.0.109.222/31	10.0.109.222 – 10.0.109.223	10.0.109.223
241	10.0.109.224/31	10.0.109.224 – 10.0.109.225	10.0.109.225
242	10.0.109.226/31	10.0.109.226 – 10.0.109.227	10.0.109.227
243	10.0.109.228/31	10.0.109.228 – 10.0.109.229	10.0.109.229
244	10.0.109.230/31	10.0.109.230 – 10.0.109.231	10.0.109.231
245	10.0.109.232/31	10.0.109.232 – 10.0.109.233	10.0.109.233
246	10.0.109.234/31	10.0.109.234 – 10.0.109.235	10.0.109.235
247	10.0.109.236/31	10.0.109.236 – 10.0.109.237	10.0.109.237
248	10.0.109.238/31	10.0.109.238 – 10.0.109.239	10.0.109.239
249	10.0.109.240/31	10.0.109.240 – 10.0.109.241	10.0.109.241
250	10.0.109.242/31	10.0.109.242 – 10.0.109.243	10.0.109.243
251	10.0.109.244/31	10.0.109.244 – 10.0.109.245	10.0.109.245
252	10.0.109.246/31	10.0.109.246 – 10.0.109.247	10.0.109.247
253	10.0.109.248/31	10.0.109.248 – 10.0.109.249	10.0.109.249
254	10.0.109.250/31	10.0.109.250 – 10.0.109.251	10.0.109.251
255	10.0.109.252/31	10.0.109.252 – 10.0.109.253	10.0.109.253
256	10.0.109.254/31	10.0.109.254 – 10.0.109.255	10.0.109.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /23
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →