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)10.2.246.0/23

network10.2.246.0/23

broadcast10.2.247.255

first host10.2.246.1

last host10.2.247.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.246.0/23

address00001010.00000010.11110110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.11110110.00000000

broadcast00001010.00000010.11110111.11111111

green = network part, grey = host part

hex0x0a02f600

decimal167966208

reverse dns0.246.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:f600

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.246.0/31	10.2.246.0 – 10.2.246.1	10.2.246.1
2	10.2.246.2/31	10.2.246.2 – 10.2.246.3	10.2.246.3
3	10.2.246.4/31	10.2.246.4 – 10.2.246.5	10.2.246.5
4	10.2.246.6/31	10.2.246.6 – 10.2.246.7	10.2.246.7
5	10.2.246.8/31	10.2.246.8 – 10.2.246.9	10.2.246.9
6	10.2.246.10/31	10.2.246.10 – 10.2.246.11	10.2.246.11
7	10.2.246.12/31	10.2.246.12 – 10.2.246.13	10.2.246.13
8	10.2.246.14/31	10.2.246.14 – 10.2.246.15	10.2.246.15
9	10.2.246.16/31	10.2.246.16 – 10.2.246.17	10.2.246.17
10	10.2.246.18/31	10.2.246.18 – 10.2.246.19	10.2.246.19
11	10.2.246.20/31	10.2.246.20 – 10.2.246.21	10.2.246.21
12	10.2.246.22/31	10.2.246.22 – 10.2.246.23	10.2.246.23
13	10.2.246.24/31	10.2.246.24 – 10.2.246.25	10.2.246.25
14	10.2.246.26/31	10.2.246.26 – 10.2.246.27	10.2.246.27
15	10.2.246.28/31	10.2.246.28 – 10.2.246.29	10.2.246.29
16	10.2.246.30/31	10.2.246.30 – 10.2.246.31	10.2.246.31
17	10.2.246.32/31	10.2.246.32 – 10.2.246.33	10.2.246.33
18	10.2.246.34/31	10.2.246.34 – 10.2.246.35	10.2.246.35
19	10.2.246.36/31	10.2.246.36 – 10.2.246.37	10.2.246.37
20	10.2.246.38/31	10.2.246.38 – 10.2.246.39	10.2.246.39
21	10.2.246.40/31	10.2.246.40 – 10.2.246.41	10.2.246.41
22	10.2.246.42/31	10.2.246.42 – 10.2.246.43	10.2.246.43
23	10.2.246.44/31	10.2.246.44 – 10.2.246.45	10.2.246.45
24	10.2.246.46/31	10.2.246.46 – 10.2.246.47	10.2.246.47
25	10.2.246.48/31	10.2.246.48 – 10.2.246.49	10.2.246.49
26	10.2.246.50/31	10.2.246.50 – 10.2.246.51	10.2.246.51
27	10.2.246.52/31	10.2.246.52 – 10.2.246.53	10.2.246.53
28	10.2.246.54/31	10.2.246.54 – 10.2.246.55	10.2.246.55
29	10.2.246.56/31	10.2.246.56 – 10.2.246.57	10.2.246.57
30	10.2.246.58/31	10.2.246.58 – 10.2.246.59	10.2.246.59
31	10.2.246.60/31	10.2.246.60 – 10.2.246.61	10.2.246.61
32	10.2.246.62/31	10.2.246.62 – 10.2.246.63	10.2.246.63
33	10.2.246.64/31	10.2.246.64 – 10.2.246.65	10.2.246.65
34	10.2.246.66/31	10.2.246.66 – 10.2.246.67	10.2.246.67
35	10.2.246.68/31	10.2.246.68 – 10.2.246.69	10.2.246.69
36	10.2.246.70/31	10.2.246.70 – 10.2.246.71	10.2.246.71
37	10.2.246.72/31	10.2.246.72 – 10.2.246.73	10.2.246.73
38	10.2.246.74/31	10.2.246.74 – 10.2.246.75	10.2.246.75
39	10.2.246.76/31	10.2.246.76 – 10.2.246.77	10.2.246.77
40	10.2.246.78/31	10.2.246.78 – 10.2.246.79	10.2.246.79
41	10.2.246.80/31	10.2.246.80 – 10.2.246.81	10.2.246.81
42	10.2.246.82/31	10.2.246.82 – 10.2.246.83	10.2.246.83
43	10.2.246.84/31	10.2.246.84 – 10.2.246.85	10.2.246.85
44	10.2.246.86/31	10.2.246.86 – 10.2.246.87	10.2.246.87
45	10.2.246.88/31	10.2.246.88 – 10.2.246.89	10.2.246.89
46	10.2.246.90/31	10.2.246.90 – 10.2.246.91	10.2.246.91
47	10.2.246.92/31	10.2.246.92 – 10.2.246.93	10.2.246.93
48	10.2.246.94/31	10.2.246.94 – 10.2.246.95	10.2.246.95
49	10.2.246.96/31	10.2.246.96 – 10.2.246.97	10.2.246.97
50	10.2.246.98/31	10.2.246.98 – 10.2.246.99	10.2.246.99
51	10.2.246.100/31	10.2.246.100 – 10.2.246.101	10.2.246.101
52	10.2.246.102/31	10.2.246.102 – 10.2.246.103	10.2.246.103
53	10.2.246.104/31	10.2.246.104 – 10.2.246.105	10.2.246.105
54	10.2.246.106/31	10.2.246.106 – 10.2.246.107	10.2.246.107
55	10.2.246.108/31	10.2.246.108 – 10.2.246.109	10.2.246.109
56	10.2.246.110/31	10.2.246.110 – 10.2.246.111	10.2.246.111
57	10.2.246.112/31	10.2.246.112 – 10.2.246.113	10.2.246.113
58	10.2.246.114/31	10.2.246.114 – 10.2.246.115	10.2.246.115
59	10.2.246.116/31	10.2.246.116 – 10.2.246.117	10.2.246.117
60	10.2.246.118/31	10.2.246.118 – 10.2.246.119	10.2.246.119
61	10.2.246.120/31	10.2.246.120 – 10.2.246.121	10.2.246.121
62	10.2.246.122/31	10.2.246.122 – 10.2.246.123	10.2.246.123
63	10.2.246.124/31	10.2.246.124 – 10.2.246.125	10.2.246.125
64	10.2.246.126/31	10.2.246.126 – 10.2.246.127	10.2.246.127
65	10.2.246.128/31	10.2.246.128 – 10.2.246.129	10.2.246.129
66	10.2.246.130/31	10.2.246.130 – 10.2.246.131	10.2.246.131
67	10.2.246.132/31	10.2.246.132 – 10.2.246.133	10.2.246.133
68	10.2.246.134/31	10.2.246.134 – 10.2.246.135	10.2.246.135
69	10.2.246.136/31	10.2.246.136 – 10.2.246.137	10.2.246.137
70	10.2.246.138/31	10.2.246.138 – 10.2.246.139	10.2.246.139
71	10.2.246.140/31	10.2.246.140 – 10.2.246.141	10.2.246.141
72	10.2.246.142/31	10.2.246.142 – 10.2.246.143	10.2.246.143
73	10.2.246.144/31	10.2.246.144 – 10.2.246.145	10.2.246.145
74	10.2.246.146/31	10.2.246.146 – 10.2.246.147	10.2.246.147
75	10.2.246.148/31	10.2.246.148 – 10.2.246.149	10.2.246.149
76	10.2.246.150/31	10.2.246.150 – 10.2.246.151	10.2.246.151
77	10.2.246.152/31	10.2.246.152 – 10.2.246.153	10.2.246.153
78	10.2.246.154/31	10.2.246.154 – 10.2.246.155	10.2.246.155
79	10.2.246.156/31	10.2.246.156 – 10.2.246.157	10.2.246.157
80	10.2.246.158/31	10.2.246.158 – 10.2.246.159	10.2.246.159
81	10.2.246.160/31	10.2.246.160 – 10.2.246.161	10.2.246.161
82	10.2.246.162/31	10.2.246.162 – 10.2.246.163	10.2.246.163
83	10.2.246.164/31	10.2.246.164 – 10.2.246.165	10.2.246.165
84	10.2.246.166/31	10.2.246.166 – 10.2.246.167	10.2.246.167
85	10.2.246.168/31	10.2.246.168 – 10.2.246.169	10.2.246.169
86	10.2.246.170/31	10.2.246.170 – 10.2.246.171	10.2.246.171
87	10.2.246.172/31	10.2.246.172 – 10.2.246.173	10.2.246.173
88	10.2.246.174/31	10.2.246.174 – 10.2.246.175	10.2.246.175
89	10.2.246.176/31	10.2.246.176 – 10.2.246.177	10.2.246.177
90	10.2.246.178/31	10.2.246.178 – 10.2.246.179	10.2.246.179
91	10.2.246.180/31	10.2.246.180 – 10.2.246.181	10.2.246.181
92	10.2.246.182/31	10.2.246.182 – 10.2.246.183	10.2.246.183
93	10.2.246.184/31	10.2.246.184 – 10.2.246.185	10.2.246.185
94	10.2.246.186/31	10.2.246.186 – 10.2.246.187	10.2.246.187
95	10.2.246.188/31	10.2.246.188 – 10.2.246.189	10.2.246.189
96	10.2.246.190/31	10.2.246.190 – 10.2.246.191	10.2.246.191
97	10.2.246.192/31	10.2.246.192 – 10.2.246.193	10.2.246.193
98	10.2.246.194/31	10.2.246.194 – 10.2.246.195	10.2.246.195
99	10.2.246.196/31	10.2.246.196 – 10.2.246.197	10.2.246.197
100	10.2.246.198/31	10.2.246.198 – 10.2.246.199	10.2.246.199
101	10.2.246.200/31	10.2.246.200 – 10.2.246.201	10.2.246.201
102	10.2.246.202/31	10.2.246.202 – 10.2.246.203	10.2.246.203
103	10.2.246.204/31	10.2.246.204 – 10.2.246.205	10.2.246.205
104	10.2.246.206/31	10.2.246.206 – 10.2.246.207	10.2.246.207
105	10.2.246.208/31	10.2.246.208 – 10.2.246.209	10.2.246.209
106	10.2.246.210/31	10.2.246.210 – 10.2.246.211	10.2.246.211
107	10.2.246.212/31	10.2.246.212 – 10.2.246.213	10.2.246.213
108	10.2.246.214/31	10.2.246.214 – 10.2.246.215	10.2.246.215
109	10.2.246.216/31	10.2.246.216 – 10.2.246.217	10.2.246.217
110	10.2.246.218/31	10.2.246.218 – 10.2.246.219	10.2.246.219
111	10.2.246.220/31	10.2.246.220 – 10.2.246.221	10.2.246.221
112	10.2.246.222/31	10.2.246.222 – 10.2.246.223	10.2.246.223
113	10.2.246.224/31	10.2.246.224 – 10.2.246.225	10.2.246.225
114	10.2.246.226/31	10.2.246.226 – 10.2.246.227	10.2.246.227
115	10.2.246.228/31	10.2.246.228 – 10.2.246.229	10.2.246.229
116	10.2.246.230/31	10.2.246.230 – 10.2.246.231	10.2.246.231
117	10.2.246.232/31	10.2.246.232 – 10.2.246.233	10.2.246.233
118	10.2.246.234/31	10.2.246.234 – 10.2.246.235	10.2.246.235
119	10.2.246.236/31	10.2.246.236 – 10.2.246.237	10.2.246.237
120	10.2.246.238/31	10.2.246.238 – 10.2.246.239	10.2.246.239
121	10.2.246.240/31	10.2.246.240 – 10.2.246.241	10.2.246.241
122	10.2.246.242/31	10.2.246.242 – 10.2.246.243	10.2.246.243
123	10.2.246.244/31	10.2.246.244 – 10.2.246.245	10.2.246.245
124	10.2.246.246/31	10.2.246.246 – 10.2.246.247	10.2.246.247
125	10.2.246.248/31	10.2.246.248 – 10.2.246.249	10.2.246.249
126	10.2.246.250/31	10.2.246.250 – 10.2.246.251	10.2.246.251
127	10.2.246.252/31	10.2.246.252 – 10.2.246.253	10.2.246.253
128	10.2.246.254/31	10.2.246.254 – 10.2.246.255	10.2.246.255
129	10.2.247.0/31	10.2.247.0 – 10.2.247.1	10.2.247.1
130	10.2.247.2/31	10.2.247.2 – 10.2.247.3	10.2.247.3
131	10.2.247.4/31	10.2.247.4 – 10.2.247.5	10.2.247.5
132	10.2.247.6/31	10.2.247.6 – 10.2.247.7	10.2.247.7
133	10.2.247.8/31	10.2.247.8 – 10.2.247.9	10.2.247.9
134	10.2.247.10/31	10.2.247.10 – 10.2.247.11	10.2.247.11
135	10.2.247.12/31	10.2.247.12 – 10.2.247.13	10.2.247.13
136	10.2.247.14/31	10.2.247.14 – 10.2.247.15	10.2.247.15
137	10.2.247.16/31	10.2.247.16 – 10.2.247.17	10.2.247.17
138	10.2.247.18/31	10.2.247.18 – 10.2.247.19	10.2.247.19
139	10.2.247.20/31	10.2.247.20 – 10.2.247.21	10.2.247.21
140	10.2.247.22/31	10.2.247.22 – 10.2.247.23	10.2.247.23
141	10.2.247.24/31	10.2.247.24 – 10.2.247.25	10.2.247.25
142	10.2.247.26/31	10.2.247.26 – 10.2.247.27	10.2.247.27
143	10.2.247.28/31	10.2.247.28 – 10.2.247.29	10.2.247.29
144	10.2.247.30/31	10.2.247.30 – 10.2.247.31	10.2.247.31
145	10.2.247.32/31	10.2.247.32 – 10.2.247.33	10.2.247.33
146	10.2.247.34/31	10.2.247.34 – 10.2.247.35	10.2.247.35
147	10.2.247.36/31	10.2.247.36 – 10.2.247.37	10.2.247.37
148	10.2.247.38/31	10.2.247.38 – 10.2.247.39	10.2.247.39
149	10.2.247.40/31	10.2.247.40 – 10.2.247.41	10.2.247.41
150	10.2.247.42/31	10.2.247.42 – 10.2.247.43	10.2.247.43
151	10.2.247.44/31	10.2.247.44 – 10.2.247.45	10.2.247.45
152	10.2.247.46/31	10.2.247.46 – 10.2.247.47	10.2.247.47
153	10.2.247.48/31	10.2.247.48 – 10.2.247.49	10.2.247.49
154	10.2.247.50/31	10.2.247.50 – 10.2.247.51	10.2.247.51
155	10.2.247.52/31	10.2.247.52 – 10.2.247.53	10.2.247.53
156	10.2.247.54/31	10.2.247.54 – 10.2.247.55	10.2.247.55
157	10.2.247.56/31	10.2.247.56 – 10.2.247.57	10.2.247.57
158	10.2.247.58/31	10.2.247.58 – 10.2.247.59	10.2.247.59
159	10.2.247.60/31	10.2.247.60 – 10.2.247.61	10.2.247.61
160	10.2.247.62/31	10.2.247.62 – 10.2.247.63	10.2.247.63
161	10.2.247.64/31	10.2.247.64 – 10.2.247.65	10.2.247.65
162	10.2.247.66/31	10.2.247.66 – 10.2.247.67	10.2.247.67
163	10.2.247.68/31	10.2.247.68 – 10.2.247.69	10.2.247.69
164	10.2.247.70/31	10.2.247.70 – 10.2.247.71	10.2.247.71
165	10.2.247.72/31	10.2.247.72 – 10.2.247.73	10.2.247.73
166	10.2.247.74/31	10.2.247.74 – 10.2.247.75	10.2.247.75
167	10.2.247.76/31	10.2.247.76 – 10.2.247.77	10.2.247.77
168	10.2.247.78/31	10.2.247.78 – 10.2.247.79	10.2.247.79
169	10.2.247.80/31	10.2.247.80 – 10.2.247.81	10.2.247.81
170	10.2.247.82/31	10.2.247.82 – 10.2.247.83	10.2.247.83
171	10.2.247.84/31	10.2.247.84 – 10.2.247.85	10.2.247.85
172	10.2.247.86/31	10.2.247.86 – 10.2.247.87	10.2.247.87
173	10.2.247.88/31	10.2.247.88 – 10.2.247.89	10.2.247.89
174	10.2.247.90/31	10.2.247.90 – 10.2.247.91	10.2.247.91
175	10.2.247.92/31	10.2.247.92 – 10.2.247.93	10.2.247.93
176	10.2.247.94/31	10.2.247.94 – 10.2.247.95	10.2.247.95
177	10.2.247.96/31	10.2.247.96 – 10.2.247.97	10.2.247.97
178	10.2.247.98/31	10.2.247.98 – 10.2.247.99	10.2.247.99
179	10.2.247.100/31	10.2.247.100 – 10.2.247.101	10.2.247.101
180	10.2.247.102/31	10.2.247.102 – 10.2.247.103	10.2.247.103
181	10.2.247.104/31	10.2.247.104 – 10.2.247.105	10.2.247.105
182	10.2.247.106/31	10.2.247.106 – 10.2.247.107	10.2.247.107
183	10.2.247.108/31	10.2.247.108 – 10.2.247.109	10.2.247.109
184	10.2.247.110/31	10.2.247.110 – 10.2.247.111	10.2.247.111
185	10.2.247.112/31	10.2.247.112 – 10.2.247.113	10.2.247.113
186	10.2.247.114/31	10.2.247.114 – 10.2.247.115	10.2.247.115
187	10.2.247.116/31	10.2.247.116 – 10.2.247.117	10.2.247.117
188	10.2.247.118/31	10.2.247.118 – 10.2.247.119	10.2.247.119
189	10.2.247.120/31	10.2.247.120 – 10.2.247.121	10.2.247.121
190	10.2.247.122/31	10.2.247.122 – 10.2.247.123	10.2.247.123
191	10.2.247.124/31	10.2.247.124 – 10.2.247.125	10.2.247.125
192	10.2.247.126/31	10.2.247.126 – 10.2.247.127	10.2.247.127
193	10.2.247.128/31	10.2.247.128 – 10.2.247.129	10.2.247.129
194	10.2.247.130/31	10.2.247.130 – 10.2.247.131	10.2.247.131
195	10.2.247.132/31	10.2.247.132 – 10.2.247.133	10.2.247.133
196	10.2.247.134/31	10.2.247.134 – 10.2.247.135	10.2.247.135
197	10.2.247.136/31	10.2.247.136 – 10.2.247.137	10.2.247.137
198	10.2.247.138/31	10.2.247.138 – 10.2.247.139	10.2.247.139
199	10.2.247.140/31	10.2.247.140 – 10.2.247.141	10.2.247.141
200	10.2.247.142/31	10.2.247.142 – 10.2.247.143	10.2.247.143
201	10.2.247.144/31	10.2.247.144 – 10.2.247.145	10.2.247.145
202	10.2.247.146/31	10.2.247.146 – 10.2.247.147	10.2.247.147
203	10.2.247.148/31	10.2.247.148 – 10.2.247.149	10.2.247.149
204	10.2.247.150/31	10.2.247.150 – 10.2.247.151	10.2.247.151
205	10.2.247.152/31	10.2.247.152 – 10.2.247.153	10.2.247.153
206	10.2.247.154/31	10.2.247.154 – 10.2.247.155	10.2.247.155
207	10.2.247.156/31	10.2.247.156 – 10.2.247.157	10.2.247.157
208	10.2.247.158/31	10.2.247.158 – 10.2.247.159	10.2.247.159
209	10.2.247.160/31	10.2.247.160 – 10.2.247.161	10.2.247.161
210	10.2.247.162/31	10.2.247.162 – 10.2.247.163	10.2.247.163
211	10.2.247.164/31	10.2.247.164 – 10.2.247.165	10.2.247.165
212	10.2.247.166/31	10.2.247.166 – 10.2.247.167	10.2.247.167
213	10.2.247.168/31	10.2.247.168 – 10.2.247.169	10.2.247.169
214	10.2.247.170/31	10.2.247.170 – 10.2.247.171	10.2.247.171
215	10.2.247.172/31	10.2.247.172 – 10.2.247.173	10.2.247.173
216	10.2.247.174/31	10.2.247.174 – 10.2.247.175	10.2.247.175
217	10.2.247.176/31	10.2.247.176 – 10.2.247.177	10.2.247.177
218	10.2.247.178/31	10.2.247.178 – 10.2.247.179	10.2.247.179
219	10.2.247.180/31	10.2.247.180 – 10.2.247.181	10.2.247.181
220	10.2.247.182/31	10.2.247.182 – 10.2.247.183	10.2.247.183
221	10.2.247.184/31	10.2.247.184 – 10.2.247.185	10.2.247.185
222	10.2.247.186/31	10.2.247.186 – 10.2.247.187	10.2.247.187
223	10.2.247.188/31	10.2.247.188 – 10.2.247.189	10.2.247.189
224	10.2.247.190/31	10.2.247.190 – 10.2.247.191	10.2.247.191
225	10.2.247.192/31	10.2.247.192 – 10.2.247.193	10.2.247.193
226	10.2.247.194/31	10.2.247.194 – 10.2.247.195	10.2.247.195
227	10.2.247.196/31	10.2.247.196 – 10.2.247.197	10.2.247.197
228	10.2.247.198/31	10.2.247.198 – 10.2.247.199	10.2.247.199
229	10.2.247.200/31	10.2.247.200 – 10.2.247.201	10.2.247.201
230	10.2.247.202/31	10.2.247.202 – 10.2.247.203	10.2.247.203
231	10.2.247.204/31	10.2.247.204 – 10.2.247.205	10.2.247.205
232	10.2.247.206/31	10.2.247.206 – 10.2.247.207	10.2.247.207
233	10.2.247.208/31	10.2.247.208 – 10.2.247.209	10.2.247.209
234	10.2.247.210/31	10.2.247.210 – 10.2.247.211	10.2.247.211
235	10.2.247.212/31	10.2.247.212 – 10.2.247.213	10.2.247.213
236	10.2.247.214/31	10.2.247.214 – 10.2.247.215	10.2.247.215
237	10.2.247.216/31	10.2.247.216 – 10.2.247.217	10.2.247.217
238	10.2.247.218/31	10.2.247.218 – 10.2.247.219	10.2.247.219
239	10.2.247.220/31	10.2.247.220 – 10.2.247.221	10.2.247.221
240	10.2.247.222/31	10.2.247.222 – 10.2.247.223	10.2.247.223
241	10.2.247.224/31	10.2.247.224 – 10.2.247.225	10.2.247.225
242	10.2.247.226/31	10.2.247.226 – 10.2.247.227	10.2.247.227
243	10.2.247.228/31	10.2.247.228 – 10.2.247.229	10.2.247.229
244	10.2.247.230/31	10.2.247.230 – 10.2.247.231	10.2.247.231
245	10.2.247.232/31	10.2.247.232 – 10.2.247.233	10.2.247.233
246	10.2.247.234/31	10.2.247.234 – 10.2.247.235	10.2.247.235
247	10.2.247.236/31	10.2.247.236 – 10.2.247.237	10.2.247.237
248	10.2.247.238/31	10.2.247.238 – 10.2.247.239	10.2.247.239
249	10.2.247.240/31	10.2.247.240 – 10.2.247.241	10.2.247.241
250	10.2.247.242/31	10.2.247.242 – 10.2.247.243	10.2.247.243
251	10.2.247.244/31	10.2.247.244 – 10.2.247.245	10.2.247.245
252	10.2.247.246/31	10.2.247.246 – 10.2.247.247	10.2.247.247
253	10.2.247.248/31	10.2.247.248 – 10.2.247.249	10.2.247.249
254	10.2.247.250/31	10.2.247.250 – 10.2.247.251	10.2.247.251
255	10.2.247.252/31	10.2.247.252 – 10.2.247.253	10.2.247.253
256	10.2.247.254/31	10.2.247.254 – 10.2.247.255	10.2.247.255

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 →