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)10.78.14.0/23

network10.78.14.0/23

broadcast10.78.15.255

first host10.78.14.1

last host10.78.15.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.14.0/23

address00001010.01001110.00001110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.00001110.00000000

broadcast00001010.01001110.00001111.11111111

green = network part, grey = host part

hex0x0a4e0e00

decimal172887552

reverse dns0.14.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:e00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.78.14.0/31	10.78.14.0 – 10.78.14.1	10.78.14.1
2	10.78.14.2/31	10.78.14.2 – 10.78.14.3	10.78.14.3
3	10.78.14.4/31	10.78.14.4 – 10.78.14.5	10.78.14.5
4	10.78.14.6/31	10.78.14.6 – 10.78.14.7	10.78.14.7
5	10.78.14.8/31	10.78.14.8 – 10.78.14.9	10.78.14.9
6	10.78.14.10/31	10.78.14.10 – 10.78.14.11	10.78.14.11
7	10.78.14.12/31	10.78.14.12 – 10.78.14.13	10.78.14.13
8	10.78.14.14/31	10.78.14.14 – 10.78.14.15	10.78.14.15
9	10.78.14.16/31	10.78.14.16 – 10.78.14.17	10.78.14.17
10	10.78.14.18/31	10.78.14.18 – 10.78.14.19	10.78.14.19
11	10.78.14.20/31	10.78.14.20 – 10.78.14.21	10.78.14.21
12	10.78.14.22/31	10.78.14.22 – 10.78.14.23	10.78.14.23
13	10.78.14.24/31	10.78.14.24 – 10.78.14.25	10.78.14.25
14	10.78.14.26/31	10.78.14.26 – 10.78.14.27	10.78.14.27
15	10.78.14.28/31	10.78.14.28 – 10.78.14.29	10.78.14.29
16	10.78.14.30/31	10.78.14.30 – 10.78.14.31	10.78.14.31
17	10.78.14.32/31	10.78.14.32 – 10.78.14.33	10.78.14.33
18	10.78.14.34/31	10.78.14.34 – 10.78.14.35	10.78.14.35
19	10.78.14.36/31	10.78.14.36 – 10.78.14.37	10.78.14.37
20	10.78.14.38/31	10.78.14.38 – 10.78.14.39	10.78.14.39
21	10.78.14.40/31	10.78.14.40 – 10.78.14.41	10.78.14.41
22	10.78.14.42/31	10.78.14.42 – 10.78.14.43	10.78.14.43
23	10.78.14.44/31	10.78.14.44 – 10.78.14.45	10.78.14.45
24	10.78.14.46/31	10.78.14.46 – 10.78.14.47	10.78.14.47
25	10.78.14.48/31	10.78.14.48 – 10.78.14.49	10.78.14.49
26	10.78.14.50/31	10.78.14.50 – 10.78.14.51	10.78.14.51
27	10.78.14.52/31	10.78.14.52 – 10.78.14.53	10.78.14.53
28	10.78.14.54/31	10.78.14.54 – 10.78.14.55	10.78.14.55
29	10.78.14.56/31	10.78.14.56 – 10.78.14.57	10.78.14.57
30	10.78.14.58/31	10.78.14.58 – 10.78.14.59	10.78.14.59
31	10.78.14.60/31	10.78.14.60 – 10.78.14.61	10.78.14.61
32	10.78.14.62/31	10.78.14.62 – 10.78.14.63	10.78.14.63
33	10.78.14.64/31	10.78.14.64 – 10.78.14.65	10.78.14.65
34	10.78.14.66/31	10.78.14.66 – 10.78.14.67	10.78.14.67
35	10.78.14.68/31	10.78.14.68 – 10.78.14.69	10.78.14.69
36	10.78.14.70/31	10.78.14.70 – 10.78.14.71	10.78.14.71
37	10.78.14.72/31	10.78.14.72 – 10.78.14.73	10.78.14.73
38	10.78.14.74/31	10.78.14.74 – 10.78.14.75	10.78.14.75
39	10.78.14.76/31	10.78.14.76 – 10.78.14.77	10.78.14.77
40	10.78.14.78/31	10.78.14.78 – 10.78.14.79	10.78.14.79
41	10.78.14.80/31	10.78.14.80 – 10.78.14.81	10.78.14.81
42	10.78.14.82/31	10.78.14.82 – 10.78.14.83	10.78.14.83
43	10.78.14.84/31	10.78.14.84 – 10.78.14.85	10.78.14.85
44	10.78.14.86/31	10.78.14.86 – 10.78.14.87	10.78.14.87
45	10.78.14.88/31	10.78.14.88 – 10.78.14.89	10.78.14.89
46	10.78.14.90/31	10.78.14.90 – 10.78.14.91	10.78.14.91
47	10.78.14.92/31	10.78.14.92 – 10.78.14.93	10.78.14.93
48	10.78.14.94/31	10.78.14.94 – 10.78.14.95	10.78.14.95
49	10.78.14.96/31	10.78.14.96 – 10.78.14.97	10.78.14.97
50	10.78.14.98/31	10.78.14.98 – 10.78.14.99	10.78.14.99
51	10.78.14.100/31	10.78.14.100 – 10.78.14.101	10.78.14.101
52	10.78.14.102/31	10.78.14.102 – 10.78.14.103	10.78.14.103
53	10.78.14.104/31	10.78.14.104 – 10.78.14.105	10.78.14.105
54	10.78.14.106/31	10.78.14.106 – 10.78.14.107	10.78.14.107
55	10.78.14.108/31	10.78.14.108 – 10.78.14.109	10.78.14.109
56	10.78.14.110/31	10.78.14.110 – 10.78.14.111	10.78.14.111
57	10.78.14.112/31	10.78.14.112 – 10.78.14.113	10.78.14.113
58	10.78.14.114/31	10.78.14.114 – 10.78.14.115	10.78.14.115
59	10.78.14.116/31	10.78.14.116 – 10.78.14.117	10.78.14.117
60	10.78.14.118/31	10.78.14.118 – 10.78.14.119	10.78.14.119
61	10.78.14.120/31	10.78.14.120 – 10.78.14.121	10.78.14.121
62	10.78.14.122/31	10.78.14.122 – 10.78.14.123	10.78.14.123
63	10.78.14.124/31	10.78.14.124 – 10.78.14.125	10.78.14.125
64	10.78.14.126/31	10.78.14.126 – 10.78.14.127	10.78.14.127
65	10.78.14.128/31	10.78.14.128 – 10.78.14.129	10.78.14.129
66	10.78.14.130/31	10.78.14.130 – 10.78.14.131	10.78.14.131
67	10.78.14.132/31	10.78.14.132 – 10.78.14.133	10.78.14.133
68	10.78.14.134/31	10.78.14.134 – 10.78.14.135	10.78.14.135
69	10.78.14.136/31	10.78.14.136 – 10.78.14.137	10.78.14.137
70	10.78.14.138/31	10.78.14.138 – 10.78.14.139	10.78.14.139
71	10.78.14.140/31	10.78.14.140 – 10.78.14.141	10.78.14.141
72	10.78.14.142/31	10.78.14.142 – 10.78.14.143	10.78.14.143
73	10.78.14.144/31	10.78.14.144 – 10.78.14.145	10.78.14.145
74	10.78.14.146/31	10.78.14.146 – 10.78.14.147	10.78.14.147
75	10.78.14.148/31	10.78.14.148 – 10.78.14.149	10.78.14.149
76	10.78.14.150/31	10.78.14.150 – 10.78.14.151	10.78.14.151
77	10.78.14.152/31	10.78.14.152 – 10.78.14.153	10.78.14.153
78	10.78.14.154/31	10.78.14.154 – 10.78.14.155	10.78.14.155
79	10.78.14.156/31	10.78.14.156 – 10.78.14.157	10.78.14.157
80	10.78.14.158/31	10.78.14.158 – 10.78.14.159	10.78.14.159
81	10.78.14.160/31	10.78.14.160 – 10.78.14.161	10.78.14.161
82	10.78.14.162/31	10.78.14.162 – 10.78.14.163	10.78.14.163
83	10.78.14.164/31	10.78.14.164 – 10.78.14.165	10.78.14.165
84	10.78.14.166/31	10.78.14.166 – 10.78.14.167	10.78.14.167
85	10.78.14.168/31	10.78.14.168 – 10.78.14.169	10.78.14.169
86	10.78.14.170/31	10.78.14.170 – 10.78.14.171	10.78.14.171
87	10.78.14.172/31	10.78.14.172 – 10.78.14.173	10.78.14.173
88	10.78.14.174/31	10.78.14.174 – 10.78.14.175	10.78.14.175
89	10.78.14.176/31	10.78.14.176 – 10.78.14.177	10.78.14.177
90	10.78.14.178/31	10.78.14.178 – 10.78.14.179	10.78.14.179
91	10.78.14.180/31	10.78.14.180 – 10.78.14.181	10.78.14.181
92	10.78.14.182/31	10.78.14.182 – 10.78.14.183	10.78.14.183
93	10.78.14.184/31	10.78.14.184 – 10.78.14.185	10.78.14.185
94	10.78.14.186/31	10.78.14.186 – 10.78.14.187	10.78.14.187
95	10.78.14.188/31	10.78.14.188 – 10.78.14.189	10.78.14.189
96	10.78.14.190/31	10.78.14.190 – 10.78.14.191	10.78.14.191
97	10.78.14.192/31	10.78.14.192 – 10.78.14.193	10.78.14.193
98	10.78.14.194/31	10.78.14.194 – 10.78.14.195	10.78.14.195
99	10.78.14.196/31	10.78.14.196 – 10.78.14.197	10.78.14.197
100	10.78.14.198/31	10.78.14.198 – 10.78.14.199	10.78.14.199
101	10.78.14.200/31	10.78.14.200 – 10.78.14.201	10.78.14.201
102	10.78.14.202/31	10.78.14.202 – 10.78.14.203	10.78.14.203
103	10.78.14.204/31	10.78.14.204 – 10.78.14.205	10.78.14.205
104	10.78.14.206/31	10.78.14.206 – 10.78.14.207	10.78.14.207
105	10.78.14.208/31	10.78.14.208 – 10.78.14.209	10.78.14.209
106	10.78.14.210/31	10.78.14.210 – 10.78.14.211	10.78.14.211
107	10.78.14.212/31	10.78.14.212 – 10.78.14.213	10.78.14.213
108	10.78.14.214/31	10.78.14.214 – 10.78.14.215	10.78.14.215
109	10.78.14.216/31	10.78.14.216 – 10.78.14.217	10.78.14.217
110	10.78.14.218/31	10.78.14.218 – 10.78.14.219	10.78.14.219
111	10.78.14.220/31	10.78.14.220 – 10.78.14.221	10.78.14.221
112	10.78.14.222/31	10.78.14.222 – 10.78.14.223	10.78.14.223
113	10.78.14.224/31	10.78.14.224 – 10.78.14.225	10.78.14.225
114	10.78.14.226/31	10.78.14.226 – 10.78.14.227	10.78.14.227
115	10.78.14.228/31	10.78.14.228 – 10.78.14.229	10.78.14.229
116	10.78.14.230/31	10.78.14.230 – 10.78.14.231	10.78.14.231
117	10.78.14.232/31	10.78.14.232 – 10.78.14.233	10.78.14.233
118	10.78.14.234/31	10.78.14.234 – 10.78.14.235	10.78.14.235
119	10.78.14.236/31	10.78.14.236 – 10.78.14.237	10.78.14.237
120	10.78.14.238/31	10.78.14.238 – 10.78.14.239	10.78.14.239
121	10.78.14.240/31	10.78.14.240 – 10.78.14.241	10.78.14.241
122	10.78.14.242/31	10.78.14.242 – 10.78.14.243	10.78.14.243
123	10.78.14.244/31	10.78.14.244 – 10.78.14.245	10.78.14.245
124	10.78.14.246/31	10.78.14.246 – 10.78.14.247	10.78.14.247
125	10.78.14.248/31	10.78.14.248 – 10.78.14.249	10.78.14.249
126	10.78.14.250/31	10.78.14.250 – 10.78.14.251	10.78.14.251
127	10.78.14.252/31	10.78.14.252 – 10.78.14.253	10.78.14.253
128	10.78.14.254/31	10.78.14.254 – 10.78.14.255	10.78.14.255
129	10.78.15.0/31	10.78.15.0 – 10.78.15.1	10.78.15.1
130	10.78.15.2/31	10.78.15.2 – 10.78.15.3	10.78.15.3
131	10.78.15.4/31	10.78.15.4 – 10.78.15.5	10.78.15.5
132	10.78.15.6/31	10.78.15.6 – 10.78.15.7	10.78.15.7
133	10.78.15.8/31	10.78.15.8 – 10.78.15.9	10.78.15.9
134	10.78.15.10/31	10.78.15.10 – 10.78.15.11	10.78.15.11
135	10.78.15.12/31	10.78.15.12 – 10.78.15.13	10.78.15.13
136	10.78.15.14/31	10.78.15.14 – 10.78.15.15	10.78.15.15
137	10.78.15.16/31	10.78.15.16 – 10.78.15.17	10.78.15.17
138	10.78.15.18/31	10.78.15.18 – 10.78.15.19	10.78.15.19
139	10.78.15.20/31	10.78.15.20 – 10.78.15.21	10.78.15.21
140	10.78.15.22/31	10.78.15.22 – 10.78.15.23	10.78.15.23
141	10.78.15.24/31	10.78.15.24 – 10.78.15.25	10.78.15.25
142	10.78.15.26/31	10.78.15.26 – 10.78.15.27	10.78.15.27
143	10.78.15.28/31	10.78.15.28 – 10.78.15.29	10.78.15.29
144	10.78.15.30/31	10.78.15.30 – 10.78.15.31	10.78.15.31
145	10.78.15.32/31	10.78.15.32 – 10.78.15.33	10.78.15.33
146	10.78.15.34/31	10.78.15.34 – 10.78.15.35	10.78.15.35
147	10.78.15.36/31	10.78.15.36 – 10.78.15.37	10.78.15.37
148	10.78.15.38/31	10.78.15.38 – 10.78.15.39	10.78.15.39
149	10.78.15.40/31	10.78.15.40 – 10.78.15.41	10.78.15.41
150	10.78.15.42/31	10.78.15.42 – 10.78.15.43	10.78.15.43
151	10.78.15.44/31	10.78.15.44 – 10.78.15.45	10.78.15.45
152	10.78.15.46/31	10.78.15.46 – 10.78.15.47	10.78.15.47
153	10.78.15.48/31	10.78.15.48 – 10.78.15.49	10.78.15.49
154	10.78.15.50/31	10.78.15.50 – 10.78.15.51	10.78.15.51
155	10.78.15.52/31	10.78.15.52 – 10.78.15.53	10.78.15.53
156	10.78.15.54/31	10.78.15.54 – 10.78.15.55	10.78.15.55
157	10.78.15.56/31	10.78.15.56 – 10.78.15.57	10.78.15.57
158	10.78.15.58/31	10.78.15.58 – 10.78.15.59	10.78.15.59
159	10.78.15.60/31	10.78.15.60 – 10.78.15.61	10.78.15.61
160	10.78.15.62/31	10.78.15.62 – 10.78.15.63	10.78.15.63
161	10.78.15.64/31	10.78.15.64 – 10.78.15.65	10.78.15.65
162	10.78.15.66/31	10.78.15.66 – 10.78.15.67	10.78.15.67
163	10.78.15.68/31	10.78.15.68 – 10.78.15.69	10.78.15.69
164	10.78.15.70/31	10.78.15.70 – 10.78.15.71	10.78.15.71
165	10.78.15.72/31	10.78.15.72 – 10.78.15.73	10.78.15.73
166	10.78.15.74/31	10.78.15.74 – 10.78.15.75	10.78.15.75
167	10.78.15.76/31	10.78.15.76 – 10.78.15.77	10.78.15.77
168	10.78.15.78/31	10.78.15.78 – 10.78.15.79	10.78.15.79
169	10.78.15.80/31	10.78.15.80 – 10.78.15.81	10.78.15.81
170	10.78.15.82/31	10.78.15.82 – 10.78.15.83	10.78.15.83
171	10.78.15.84/31	10.78.15.84 – 10.78.15.85	10.78.15.85
172	10.78.15.86/31	10.78.15.86 – 10.78.15.87	10.78.15.87
173	10.78.15.88/31	10.78.15.88 – 10.78.15.89	10.78.15.89
174	10.78.15.90/31	10.78.15.90 – 10.78.15.91	10.78.15.91
175	10.78.15.92/31	10.78.15.92 – 10.78.15.93	10.78.15.93
176	10.78.15.94/31	10.78.15.94 – 10.78.15.95	10.78.15.95
177	10.78.15.96/31	10.78.15.96 – 10.78.15.97	10.78.15.97
178	10.78.15.98/31	10.78.15.98 – 10.78.15.99	10.78.15.99
179	10.78.15.100/31	10.78.15.100 – 10.78.15.101	10.78.15.101
180	10.78.15.102/31	10.78.15.102 – 10.78.15.103	10.78.15.103
181	10.78.15.104/31	10.78.15.104 – 10.78.15.105	10.78.15.105
182	10.78.15.106/31	10.78.15.106 – 10.78.15.107	10.78.15.107
183	10.78.15.108/31	10.78.15.108 – 10.78.15.109	10.78.15.109
184	10.78.15.110/31	10.78.15.110 – 10.78.15.111	10.78.15.111
185	10.78.15.112/31	10.78.15.112 – 10.78.15.113	10.78.15.113
186	10.78.15.114/31	10.78.15.114 – 10.78.15.115	10.78.15.115
187	10.78.15.116/31	10.78.15.116 – 10.78.15.117	10.78.15.117
188	10.78.15.118/31	10.78.15.118 – 10.78.15.119	10.78.15.119
189	10.78.15.120/31	10.78.15.120 – 10.78.15.121	10.78.15.121
190	10.78.15.122/31	10.78.15.122 – 10.78.15.123	10.78.15.123
191	10.78.15.124/31	10.78.15.124 – 10.78.15.125	10.78.15.125
192	10.78.15.126/31	10.78.15.126 – 10.78.15.127	10.78.15.127
193	10.78.15.128/31	10.78.15.128 – 10.78.15.129	10.78.15.129
194	10.78.15.130/31	10.78.15.130 – 10.78.15.131	10.78.15.131
195	10.78.15.132/31	10.78.15.132 – 10.78.15.133	10.78.15.133
196	10.78.15.134/31	10.78.15.134 – 10.78.15.135	10.78.15.135
197	10.78.15.136/31	10.78.15.136 – 10.78.15.137	10.78.15.137
198	10.78.15.138/31	10.78.15.138 – 10.78.15.139	10.78.15.139
199	10.78.15.140/31	10.78.15.140 – 10.78.15.141	10.78.15.141
200	10.78.15.142/31	10.78.15.142 – 10.78.15.143	10.78.15.143
201	10.78.15.144/31	10.78.15.144 – 10.78.15.145	10.78.15.145
202	10.78.15.146/31	10.78.15.146 – 10.78.15.147	10.78.15.147
203	10.78.15.148/31	10.78.15.148 – 10.78.15.149	10.78.15.149
204	10.78.15.150/31	10.78.15.150 – 10.78.15.151	10.78.15.151
205	10.78.15.152/31	10.78.15.152 – 10.78.15.153	10.78.15.153
206	10.78.15.154/31	10.78.15.154 – 10.78.15.155	10.78.15.155
207	10.78.15.156/31	10.78.15.156 – 10.78.15.157	10.78.15.157
208	10.78.15.158/31	10.78.15.158 – 10.78.15.159	10.78.15.159
209	10.78.15.160/31	10.78.15.160 – 10.78.15.161	10.78.15.161
210	10.78.15.162/31	10.78.15.162 – 10.78.15.163	10.78.15.163
211	10.78.15.164/31	10.78.15.164 – 10.78.15.165	10.78.15.165
212	10.78.15.166/31	10.78.15.166 – 10.78.15.167	10.78.15.167
213	10.78.15.168/31	10.78.15.168 – 10.78.15.169	10.78.15.169
214	10.78.15.170/31	10.78.15.170 – 10.78.15.171	10.78.15.171
215	10.78.15.172/31	10.78.15.172 – 10.78.15.173	10.78.15.173
216	10.78.15.174/31	10.78.15.174 – 10.78.15.175	10.78.15.175
217	10.78.15.176/31	10.78.15.176 – 10.78.15.177	10.78.15.177
218	10.78.15.178/31	10.78.15.178 – 10.78.15.179	10.78.15.179
219	10.78.15.180/31	10.78.15.180 – 10.78.15.181	10.78.15.181
220	10.78.15.182/31	10.78.15.182 – 10.78.15.183	10.78.15.183
221	10.78.15.184/31	10.78.15.184 – 10.78.15.185	10.78.15.185
222	10.78.15.186/31	10.78.15.186 – 10.78.15.187	10.78.15.187
223	10.78.15.188/31	10.78.15.188 – 10.78.15.189	10.78.15.189
224	10.78.15.190/31	10.78.15.190 – 10.78.15.191	10.78.15.191
225	10.78.15.192/31	10.78.15.192 – 10.78.15.193	10.78.15.193
226	10.78.15.194/31	10.78.15.194 – 10.78.15.195	10.78.15.195
227	10.78.15.196/31	10.78.15.196 – 10.78.15.197	10.78.15.197
228	10.78.15.198/31	10.78.15.198 – 10.78.15.199	10.78.15.199
229	10.78.15.200/31	10.78.15.200 – 10.78.15.201	10.78.15.201
230	10.78.15.202/31	10.78.15.202 – 10.78.15.203	10.78.15.203
231	10.78.15.204/31	10.78.15.204 – 10.78.15.205	10.78.15.205
232	10.78.15.206/31	10.78.15.206 – 10.78.15.207	10.78.15.207
233	10.78.15.208/31	10.78.15.208 – 10.78.15.209	10.78.15.209
234	10.78.15.210/31	10.78.15.210 – 10.78.15.211	10.78.15.211
235	10.78.15.212/31	10.78.15.212 – 10.78.15.213	10.78.15.213
236	10.78.15.214/31	10.78.15.214 – 10.78.15.215	10.78.15.215
237	10.78.15.216/31	10.78.15.216 – 10.78.15.217	10.78.15.217
238	10.78.15.218/31	10.78.15.218 – 10.78.15.219	10.78.15.219
239	10.78.15.220/31	10.78.15.220 – 10.78.15.221	10.78.15.221
240	10.78.15.222/31	10.78.15.222 – 10.78.15.223	10.78.15.223
241	10.78.15.224/31	10.78.15.224 – 10.78.15.225	10.78.15.225
242	10.78.15.226/31	10.78.15.226 – 10.78.15.227	10.78.15.227
243	10.78.15.228/31	10.78.15.228 – 10.78.15.229	10.78.15.229
244	10.78.15.230/31	10.78.15.230 – 10.78.15.231	10.78.15.231
245	10.78.15.232/31	10.78.15.232 – 10.78.15.233	10.78.15.233
246	10.78.15.234/31	10.78.15.234 – 10.78.15.235	10.78.15.235
247	10.78.15.236/31	10.78.15.236 – 10.78.15.237	10.78.15.237
248	10.78.15.238/31	10.78.15.238 – 10.78.15.239	10.78.15.239
249	10.78.15.240/31	10.78.15.240 – 10.78.15.241	10.78.15.241
250	10.78.15.242/31	10.78.15.242 – 10.78.15.243	10.78.15.243
251	10.78.15.244/31	10.78.15.244 – 10.78.15.245	10.78.15.245
252	10.78.15.246/31	10.78.15.246 – 10.78.15.247	10.78.15.247
253	10.78.15.248/31	10.78.15.248 – 10.78.15.249	10.78.15.249
254	10.78.15.250/31	10.78.15.250 – 10.78.15.251	10.78.15.251
255	10.78.15.252/31	10.78.15.252 – 10.78.15.253	10.78.15.253
256	10.78.15.254/31	10.78.15.254 – 10.78.15.255	10.78.15.255

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 →