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)10.78.110.0/23

network10.78.110.0/23

broadcast10.78.111.255

first host10.78.110.1

last host10.78.111.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.110.0/23

address00001010.01001110.01101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.01101110.00000000

broadcast00001010.01001110.01101111.11111111

green = network part, grey = host part

hex0x0a4e6e00

decimal172912128

reverse dns0.110.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:6e00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.78.110.0/31	10.78.110.0 – 10.78.110.1	10.78.110.1
2	10.78.110.2/31	10.78.110.2 – 10.78.110.3	10.78.110.3
3	10.78.110.4/31	10.78.110.4 – 10.78.110.5	10.78.110.5
4	10.78.110.6/31	10.78.110.6 – 10.78.110.7	10.78.110.7
5	10.78.110.8/31	10.78.110.8 – 10.78.110.9	10.78.110.9
6	10.78.110.10/31	10.78.110.10 – 10.78.110.11	10.78.110.11
7	10.78.110.12/31	10.78.110.12 – 10.78.110.13	10.78.110.13
8	10.78.110.14/31	10.78.110.14 – 10.78.110.15	10.78.110.15
9	10.78.110.16/31	10.78.110.16 – 10.78.110.17	10.78.110.17
10	10.78.110.18/31	10.78.110.18 – 10.78.110.19	10.78.110.19
11	10.78.110.20/31	10.78.110.20 – 10.78.110.21	10.78.110.21
12	10.78.110.22/31	10.78.110.22 – 10.78.110.23	10.78.110.23
13	10.78.110.24/31	10.78.110.24 – 10.78.110.25	10.78.110.25
14	10.78.110.26/31	10.78.110.26 – 10.78.110.27	10.78.110.27
15	10.78.110.28/31	10.78.110.28 – 10.78.110.29	10.78.110.29
16	10.78.110.30/31	10.78.110.30 – 10.78.110.31	10.78.110.31
17	10.78.110.32/31	10.78.110.32 – 10.78.110.33	10.78.110.33
18	10.78.110.34/31	10.78.110.34 – 10.78.110.35	10.78.110.35
19	10.78.110.36/31	10.78.110.36 – 10.78.110.37	10.78.110.37
20	10.78.110.38/31	10.78.110.38 – 10.78.110.39	10.78.110.39
21	10.78.110.40/31	10.78.110.40 – 10.78.110.41	10.78.110.41
22	10.78.110.42/31	10.78.110.42 – 10.78.110.43	10.78.110.43
23	10.78.110.44/31	10.78.110.44 – 10.78.110.45	10.78.110.45
24	10.78.110.46/31	10.78.110.46 – 10.78.110.47	10.78.110.47
25	10.78.110.48/31	10.78.110.48 – 10.78.110.49	10.78.110.49
26	10.78.110.50/31	10.78.110.50 – 10.78.110.51	10.78.110.51
27	10.78.110.52/31	10.78.110.52 – 10.78.110.53	10.78.110.53
28	10.78.110.54/31	10.78.110.54 – 10.78.110.55	10.78.110.55
29	10.78.110.56/31	10.78.110.56 – 10.78.110.57	10.78.110.57
30	10.78.110.58/31	10.78.110.58 – 10.78.110.59	10.78.110.59
31	10.78.110.60/31	10.78.110.60 – 10.78.110.61	10.78.110.61
32	10.78.110.62/31	10.78.110.62 – 10.78.110.63	10.78.110.63
33	10.78.110.64/31	10.78.110.64 – 10.78.110.65	10.78.110.65
34	10.78.110.66/31	10.78.110.66 – 10.78.110.67	10.78.110.67
35	10.78.110.68/31	10.78.110.68 – 10.78.110.69	10.78.110.69
36	10.78.110.70/31	10.78.110.70 – 10.78.110.71	10.78.110.71
37	10.78.110.72/31	10.78.110.72 – 10.78.110.73	10.78.110.73
38	10.78.110.74/31	10.78.110.74 – 10.78.110.75	10.78.110.75
39	10.78.110.76/31	10.78.110.76 – 10.78.110.77	10.78.110.77
40	10.78.110.78/31	10.78.110.78 – 10.78.110.79	10.78.110.79
41	10.78.110.80/31	10.78.110.80 – 10.78.110.81	10.78.110.81
42	10.78.110.82/31	10.78.110.82 – 10.78.110.83	10.78.110.83
43	10.78.110.84/31	10.78.110.84 – 10.78.110.85	10.78.110.85
44	10.78.110.86/31	10.78.110.86 – 10.78.110.87	10.78.110.87
45	10.78.110.88/31	10.78.110.88 – 10.78.110.89	10.78.110.89
46	10.78.110.90/31	10.78.110.90 – 10.78.110.91	10.78.110.91
47	10.78.110.92/31	10.78.110.92 – 10.78.110.93	10.78.110.93
48	10.78.110.94/31	10.78.110.94 – 10.78.110.95	10.78.110.95
49	10.78.110.96/31	10.78.110.96 – 10.78.110.97	10.78.110.97
50	10.78.110.98/31	10.78.110.98 – 10.78.110.99	10.78.110.99
51	10.78.110.100/31	10.78.110.100 – 10.78.110.101	10.78.110.101
52	10.78.110.102/31	10.78.110.102 – 10.78.110.103	10.78.110.103
53	10.78.110.104/31	10.78.110.104 – 10.78.110.105	10.78.110.105
54	10.78.110.106/31	10.78.110.106 – 10.78.110.107	10.78.110.107
55	10.78.110.108/31	10.78.110.108 – 10.78.110.109	10.78.110.109
56	10.78.110.110/31	10.78.110.110 – 10.78.110.111	10.78.110.111
57	10.78.110.112/31	10.78.110.112 – 10.78.110.113	10.78.110.113
58	10.78.110.114/31	10.78.110.114 – 10.78.110.115	10.78.110.115
59	10.78.110.116/31	10.78.110.116 – 10.78.110.117	10.78.110.117
60	10.78.110.118/31	10.78.110.118 – 10.78.110.119	10.78.110.119
61	10.78.110.120/31	10.78.110.120 – 10.78.110.121	10.78.110.121
62	10.78.110.122/31	10.78.110.122 – 10.78.110.123	10.78.110.123
63	10.78.110.124/31	10.78.110.124 – 10.78.110.125	10.78.110.125
64	10.78.110.126/31	10.78.110.126 – 10.78.110.127	10.78.110.127
65	10.78.110.128/31	10.78.110.128 – 10.78.110.129	10.78.110.129
66	10.78.110.130/31	10.78.110.130 – 10.78.110.131	10.78.110.131
67	10.78.110.132/31	10.78.110.132 – 10.78.110.133	10.78.110.133
68	10.78.110.134/31	10.78.110.134 – 10.78.110.135	10.78.110.135
69	10.78.110.136/31	10.78.110.136 – 10.78.110.137	10.78.110.137
70	10.78.110.138/31	10.78.110.138 – 10.78.110.139	10.78.110.139
71	10.78.110.140/31	10.78.110.140 – 10.78.110.141	10.78.110.141
72	10.78.110.142/31	10.78.110.142 – 10.78.110.143	10.78.110.143
73	10.78.110.144/31	10.78.110.144 – 10.78.110.145	10.78.110.145
74	10.78.110.146/31	10.78.110.146 – 10.78.110.147	10.78.110.147
75	10.78.110.148/31	10.78.110.148 – 10.78.110.149	10.78.110.149
76	10.78.110.150/31	10.78.110.150 – 10.78.110.151	10.78.110.151
77	10.78.110.152/31	10.78.110.152 – 10.78.110.153	10.78.110.153
78	10.78.110.154/31	10.78.110.154 – 10.78.110.155	10.78.110.155
79	10.78.110.156/31	10.78.110.156 – 10.78.110.157	10.78.110.157
80	10.78.110.158/31	10.78.110.158 – 10.78.110.159	10.78.110.159
81	10.78.110.160/31	10.78.110.160 – 10.78.110.161	10.78.110.161
82	10.78.110.162/31	10.78.110.162 – 10.78.110.163	10.78.110.163
83	10.78.110.164/31	10.78.110.164 – 10.78.110.165	10.78.110.165
84	10.78.110.166/31	10.78.110.166 – 10.78.110.167	10.78.110.167
85	10.78.110.168/31	10.78.110.168 – 10.78.110.169	10.78.110.169
86	10.78.110.170/31	10.78.110.170 – 10.78.110.171	10.78.110.171
87	10.78.110.172/31	10.78.110.172 – 10.78.110.173	10.78.110.173
88	10.78.110.174/31	10.78.110.174 – 10.78.110.175	10.78.110.175
89	10.78.110.176/31	10.78.110.176 – 10.78.110.177	10.78.110.177
90	10.78.110.178/31	10.78.110.178 – 10.78.110.179	10.78.110.179
91	10.78.110.180/31	10.78.110.180 – 10.78.110.181	10.78.110.181
92	10.78.110.182/31	10.78.110.182 – 10.78.110.183	10.78.110.183
93	10.78.110.184/31	10.78.110.184 – 10.78.110.185	10.78.110.185
94	10.78.110.186/31	10.78.110.186 – 10.78.110.187	10.78.110.187
95	10.78.110.188/31	10.78.110.188 – 10.78.110.189	10.78.110.189
96	10.78.110.190/31	10.78.110.190 – 10.78.110.191	10.78.110.191
97	10.78.110.192/31	10.78.110.192 – 10.78.110.193	10.78.110.193
98	10.78.110.194/31	10.78.110.194 – 10.78.110.195	10.78.110.195
99	10.78.110.196/31	10.78.110.196 – 10.78.110.197	10.78.110.197
100	10.78.110.198/31	10.78.110.198 – 10.78.110.199	10.78.110.199
101	10.78.110.200/31	10.78.110.200 – 10.78.110.201	10.78.110.201
102	10.78.110.202/31	10.78.110.202 – 10.78.110.203	10.78.110.203
103	10.78.110.204/31	10.78.110.204 – 10.78.110.205	10.78.110.205
104	10.78.110.206/31	10.78.110.206 – 10.78.110.207	10.78.110.207
105	10.78.110.208/31	10.78.110.208 – 10.78.110.209	10.78.110.209
106	10.78.110.210/31	10.78.110.210 – 10.78.110.211	10.78.110.211
107	10.78.110.212/31	10.78.110.212 – 10.78.110.213	10.78.110.213
108	10.78.110.214/31	10.78.110.214 – 10.78.110.215	10.78.110.215
109	10.78.110.216/31	10.78.110.216 – 10.78.110.217	10.78.110.217
110	10.78.110.218/31	10.78.110.218 – 10.78.110.219	10.78.110.219
111	10.78.110.220/31	10.78.110.220 – 10.78.110.221	10.78.110.221
112	10.78.110.222/31	10.78.110.222 – 10.78.110.223	10.78.110.223
113	10.78.110.224/31	10.78.110.224 – 10.78.110.225	10.78.110.225
114	10.78.110.226/31	10.78.110.226 – 10.78.110.227	10.78.110.227
115	10.78.110.228/31	10.78.110.228 – 10.78.110.229	10.78.110.229
116	10.78.110.230/31	10.78.110.230 – 10.78.110.231	10.78.110.231
117	10.78.110.232/31	10.78.110.232 – 10.78.110.233	10.78.110.233
118	10.78.110.234/31	10.78.110.234 – 10.78.110.235	10.78.110.235
119	10.78.110.236/31	10.78.110.236 – 10.78.110.237	10.78.110.237
120	10.78.110.238/31	10.78.110.238 – 10.78.110.239	10.78.110.239
121	10.78.110.240/31	10.78.110.240 – 10.78.110.241	10.78.110.241
122	10.78.110.242/31	10.78.110.242 – 10.78.110.243	10.78.110.243
123	10.78.110.244/31	10.78.110.244 – 10.78.110.245	10.78.110.245
124	10.78.110.246/31	10.78.110.246 – 10.78.110.247	10.78.110.247
125	10.78.110.248/31	10.78.110.248 – 10.78.110.249	10.78.110.249
126	10.78.110.250/31	10.78.110.250 – 10.78.110.251	10.78.110.251
127	10.78.110.252/31	10.78.110.252 – 10.78.110.253	10.78.110.253
128	10.78.110.254/31	10.78.110.254 – 10.78.110.255	10.78.110.255
129	10.78.111.0/31	10.78.111.0 – 10.78.111.1	10.78.111.1
130	10.78.111.2/31	10.78.111.2 – 10.78.111.3	10.78.111.3
131	10.78.111.4/31	10.78.111.4 – 10.78.111.5	10.78.111.5
132	10.78.111.6/31	10.78.111.6 – 10.78.111.7	10.78.111.7
133	10.78.111.8/31	10.78.111.8 – 10.78.111.9	10.78.111.9
134	10.78.111.10/31	10.78.111.10 – 10.78.111.11	10.78.111.11
135	10.78.111.12/31	10.78.111.12 – 10.78.111.13	10.78.111.13
136	10.78.111.14/31	10.78.111.14 – 10.78.111.15	10.78.111.15
137	10.78.111.16/31	10.78.111.16 – 10.78.111.17	10.78.111.17
138	10.78.111.18/31	10.78.111.18 – 10.78.111.19	10.78.111.19
139	10.78.111.20/31	10.78.111.20 – 10.78.111.21	10.78.111.21
140	10.78.111.22/31	10.78.111.22 – 10.78.111.23	10.78.111.23
141	10.78.111.24/31	10.78.111.24 – 10.78.111.25	10.78.111.25
142	10.78.111.26/31	10.78.111.26 – 10.78.111.27	10.78.111.27
143	10.78.111.28/31	10.78.111.28 – 10.78.111.29	10.78.111.29
144	10.78.111.30/31	10.78.111.30 – 10.78.111.31	10.78.111.31
145	10.78.111.32/31	10.78.111.32 – 10.78.111.33	10.78.111.33
146	10.78.111.34/31	10.78.111.34 – 10.78.111.35	10.78.111.35
147	10.78.111.36/31	10.78.111.36 – 10.78.111.37	10.78.111.37
148	10.78.111.38/31	10.78.111.38 – 10.78.111.39	10.78.111.39
149	10.78.111.40/31	10.78.111.40 – 10.78.111.41	10.78.111.41
150	10.78.111.42/31	10.78.111.42 – 10.78.111.43	10.78.111.43
151	10.78.111.44/31	10.78.111.44 – 10.78.111.45	10.78.111.45
152	10.78.111.46/31	10.78.111.46 – 10.78.111.47	10.78.111.47
153	10.78.111.48/31	10.78.111.48 – 10.78.111.49	10.78.111.49
154	10.78.111.50/31	10.78.111.50 – 10.78.111.51	10.78.111.51
155	10.78.111.52/31	10.78.111.52 – 10.78.111.53	10.78.111.53
156	10.78.111.54/31	10.78.111.54 – 10.78.111.55	10.78.111.55
157	10.78.111.56/31	10.78.111.56 – 10.78.111.57	10.78.111.57
158	10.78.111.58/31	10.78.111.58 – 10.78.111.59	10.78.111.59
159	10.78.111.60/31	10.78.111.60 – 10.78.111.61	10.78.111.61
160	10.78.111.62/31	10.78.111.62 – 10.78.111.63	10.78.111.63
161	10.78.111.64/31	10.78.111.64 – 10.78.111.65	10.78.111.65
162	10.78.111.66/31	10.78.111.66 – 10.78.111.67	10.78.111.67
163	10.78.111.68/31	10.78.111.68 – 10.78.111.69	10.78.111.69
164	10.78.111.70/31	10.78.111.70 – 10.78.111.71	10.78.111.71
165	10.78.111.72/31	10.78.111.72 – 10.78.111.73	10.78.111.73
166	10.78.111.74/31	10.78.111.74 – 10.78.111.75	10.78.111.75
167	10.78.111.76/31	10.78.111.76 – 10.78.111.77	10.78.111.77
168	10.78.111.78/31	10.78.111.78 – 10.78.111.79	10.78.111.79
169	10.78.111.80/31	10.78.111.80 – 10.78.111.81	10.78.111.81
170	10.78.111.82/31	10.78.111.82 – 10.78.111.83	10.78.111.83
171	10.78.111.84/31	10.78.111.84 – 10.78.111.85	10.78.111.85
172	10.78.111.86/31	10.78.111.86 – 10.78.111.87	10.78.111.87
173	10.78.111.88/31	10.78.111.88 – 10.78.111.89	10.78.111.89
174	10.78.111.90/31	10.78.111.90 – 10.78.111.91	10.78.111.91
175	10.78.111.92/31	10.78.111.92 – 10.78.111.93	10.78.111.93
176	10.78.111.94/31	10.78.111.94 – 10.78.111.95	10.78.111.95
177	10.78.111.96/31	10.78.111.96 – 10.78.111.97	10.78.111.97
178	10.78.111.98/31	10.78.111.98 – 10.78.111.99	10.78.111.99
179	10.78.111.100/31	10.78.111.100 – 10.78.111.101	10.78.111.101
180	10.78.111.102/31	10.78.111.102 – 10.78.111.103	10.78.111.103
181	10.78.111.104/31	10.78.111.104 – 10.78.111.105	10.78.111.105
182	10.78.111.106/31	10.78.111.106 – 10.78.111.107	10.78.111.107
183	10.78.111.108/31	10.78.111.108 – 10.78.111.109	10.78.111.109
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186	10.78.111.114/31	10.78.111.114 – 10.78.111.115	10.78.111.115
187	10.78.111.116/31	10.78.111.116 – 10.78.111.117	10.78.111.117
188	10.78.111.118/31	10.78.111.118 – 10.78.111.119	10.78.111.119
189	10.78.111.120/31	10.78.111.120 – 10.78.111.121	10.78.111.121
190	10.78.111.122/31	10.78.111.122 – 10.78.111.123	10.78.111.123
191	10.78.111.124/31	10.78.111.124 – 10.78.111.125	10.78.111.125
192	10.78.111.126/31	10.78.111.126 – 10.78.111.127	10.78.111.127
193	10.78.111.128/31	10.78.111.128 – 10.78.111.129	10.78.111.129
194	10.78.111.130/31	10.78.111.130 – 10.78.111.131	10.78.111.131
195	10.78.111.132/31	10.78.111.132 – 10.78.111.133	10.78.111.133
196	10.78.111.134/31	10.78.111.134 – 10.78.111.135	10.78.111.135
197	10.78.111.136/31	10.78.111.136 – 10.78.111.137	10.78.111.137
198	10.78.111.138/31	10.78.111.138 – 10.78.111.139	10.78.111.139
199	10.78.111.140/31	10.78.111.140 – 10.78.111.141	10.78.111.141
200	10.78.111.142/31	10.78.111.142 – 10.78.111.143	10.78.111.143
201	10.78.111.144/31	10.78.111.144 – 10.78.111.145	10.78.111.145
202	10.78.111.146/31	10.78.111.146 – 10.78.111.147	10.78.111.147
203	10.78.111.148/31	10.78.111.148 – 10.78.111.149	10.78.111.149
204	10.78.111.150/31	10.78.111.150 – 10.78.111.151	10.78.111.151
205	10.78.111.152/31	10.78.111.152 – 10.78.111.153	10.78.111.153
206	10.78.111.154/31	10.78.111.154 – 10.78.111.155	10.78.111.155
207	10.78.111.156/31	10.78.111.156 – 10.78.111.157	10.78.111.157
208	10.78.111.158/31	10.78.111.158 – 10.78.111.159	10.78.111.159
209	10.78.111.160/31	10.78.111.160 – 10.78.111.161	10.78.111.161
210	10.78.111.162/31	10.78.111.162 – 10.78.111.163	10.78.111.163
211	10.78.111.164/31	10.78.111.164 – 10.78.111.165	10.78.111.165
212	10.78.111.166/31	10.78.111.166 – 10.78.111.167	10.78.111.167
213	10.78.111.168/31	10.78.111.168 – 10.78.111.169	10.78.111.169
214	10.78.111.170/31	10.78.111.170 – 10.78.111.171	10.78.111.171
215	10.78.111.172/31	10.78.111.172 – 10.78.111.173	10.78.111.173
216	10.78.111.174/31	10.78.111.174 – 10.78.111.175	10.78.111.175
217	10.78.111.176/31	10.78.111.176 – 10.78.111.177	10.78.111.177
218	10.78.111.178/31	10.78.111.178 – 10.78.111.179	10.78.111.179
219	10.78.111.180/31	10.78.111.180 – 10.78.111.181	10.78.111.181
220	10.78.111.182/31	10.78.111.182 – 10.78.111.183	10.78.111.183
221	10.78.111.184/31	10.78.111.184 – 10.78.111.185	10.78.111.185
222	10.78.111.186/31	10.78.111.186 – 10.78.111.187	10.78.111.187
223	10.78.111.188/31	10.78.111.188 – 10.78.111.189	10.78.111.189
224	10.78.111.190/31	10.78.111.190 – 10.78.111.191	10.78.111.191
225	10.78.111.192/31	10.78.111.192 – 10.78.111.193	10.78.111.193
226	10.78.111.194/31	10.78.111.194 – 10.78.111.195	10.78.111.195
227	10.78.111.196/31	10.78.111.196 – 10.78.111.197	10.78.111.197
228	10.78.111.198/31	10.78.111.198 – 10.78.111.199	10.78.111.199
229	10.78.111.200/31	10.78.111.200 – 10.78.111.201	10.78.111.201
230	10.78.111.202/31	10.78.111.202 – 10.78.111.203	10.78.111.203
231	10.78.111.204/31	10.78.111.204 – 10.78.111.205	10.78.111.205
232	10.78.111.206/31	10.78.111.206 – 10.78.111.207	10.78.111.207
233	10.78.111.208/31	10.78.111.208 – 10.78.111.209	10.78.111.209
234	10.78.111.210/31	10.78.111.210 – 10.78.111.211	10.78.111.211
235	10.78.111.212/31	10.78.111.212 – 10.78.111.213	10.78.111.213
236	10.78.111.214/31	10.78.111.214 – 10.78.111.215	10.78.111.215
237	10.78.111.216/31	10.78.111.216 – 10.78.111.217	10.78.111.217
238	10.78.111.218/31	10.78.111.218 – 10.78.111.219	10.78.111.219
239	10.78.111.220/31	10.78.111.220 – 10.78.111.221	10.78.111.221
240	10.78.111.222/31	10.78.111.222 – 10.78.111.223	10.78.111.223
241	10.78.111.224/31	10.78.111.224 – 10.78.111.225	10.78.111.225
242	10.78.111.226/31	10.78.111.226 – 10.78.111.227	10.78.111.227
243	10.78.111.228/31	10.78.111.228 – 10.78.111.229	10.78.111.229
244	10.78.111.230/31	10.78.111.230 – 10.78.111.231	10.78.111.231
245	10.78.111.232/31	10.78.111.232 – 10.78.111.233	10.78.111.233
246	10.78.111.234/31	10.78.111.234 – 10.78.111.235	10.78.111.235
247	10.78.111.236/31	10.78.111.236 – 10.78.111.237	10.78.111.237
248	10.78.111.238/31	10.78.111.238 – 10.78.111.239	10.78.111.239
249	10.78.111.240/31	10.78.111.240 – 10.78.111.241	10.78.111.241
250	10.78.111.242/31	10.78.111.242 – 10.78.111.243	10.78.111.243
251	10.78.111.244/31	10.78.111.244 – 10.78.111.245	10.78.111.245
252	10.78.111.246/31	10.78.111.246 – 10.78.111.247	10.78.111.247
253	10.78.111.248/31	10.78.111.248 – 10.78.111.249	10.78.111.249
254	10.78.111.250/31	10.78.111.250 – 10.78.111.251	10.78.111.251
255	10.78.111.252/31	10.78.111.252 – 10.78.111.253	10.78.111.253
256	10.78.111.254/31	10.78.111.254 – 10.78.111.255	10.78.111.255

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 →