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)10.3.92.0/23

network10.3.92.0/23

broadcast10.3.93.255

first host10.3.92.1

last host10.3.93.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.92.0/23

address00001010.00000011.01011100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.01011100.00000000

broadcast00001010.00000011.01011101.11111111

green = network part, grey = host part

hex0x0a035c00

decimal167992320

reverse dns0.92.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:5c00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.92.0/31	10.3.92.0 – 10.3.92.1	10.3.92.1
2	10.3.92.2/31	10.3.92.2 – 10.3.92.3	10.3.92.3
3	10.3.92.4/31	10.3.92.4 – 10.3.92.5	10.3.92.5
4	10.3.92.6/31	10.3.92.6 – 10.3.92.7	10.3.92.7
5	10.3.92.8/31	10.3.92.8 – 10.3.92.9	10.3.92.9
6	10.3.92.10/31	10.3.92.10 – 10.3.92.11	10.3.92.11
7	10.3.92.12/31	10.3.92.12 – 10.3.92.13	10.3.92.13
8	10.3.92.14/31	10.3.92.14 – 10.3.92.15	10.3.92.15
9	10.3.92.16/31	10.3.92.16 – 10.3.92.17	10.3.92.17
10	10.3.92.18/31	10.3.92.18 – 10.3.92.19	10.3.92.19
11	10.3.92.20/31	10.3.92.20 – 10.3.92.21	10.3.92.21
12	10.3.92.22/31	10.3.92.22 – 10.3.92.23	10.3.92.23
13	10.3.92.24/31	10.3.92.24 – 10.3.92.25	10.3.92.25
14	10.3.92.26/31	10.3.92.26 – 10.3.92.27	10.3.92.27
15	10.3.92.28/31	10.3.92.28 – 10.3.92.29	10.3.92.29
16	10.3.92.30/31	10.3.92.30 – 10.3.92.31	10.3.92.31
17	10.3.92.32/31	10.3.92.32 – 10.3.92.33	10.3.92.33
18	10.3.92.34/31	10.3.92.34 – 10.3.92.35	10.3.92.35
19	10.3.92.36/31	10.3.92.36 – 10.3.92.37	10.3.92.37
20	10.3.92.38/31	10.3.92.38 – 10.3.92.39	10.3.92.39
21	10.3.92.40/31	10.3.92.40 – 10.3.92.41	10.3.92.41
22	10.3.92.42/31	10.3.92.42 – 10.3.92.43	10.3.92.43
23	10.3.92.44/31	10.3.92.44 – 10.3.92.45	10.3.92.45
24	10.3.92.46/31	10.3.92.46 – 10.3.92.47	10.3.92.47
25	10.3.92.48/31	10.3.92.48 – 10.3.92.49	10.3.92.49
26	10.3.92.50/31	10.3.92.50 – 10.3.92.51	10.3.92.51
27	10.3.92.52/31	10.3.92.52 – 10.3.92.53	10.3.92.53
28	10.3.92.54/31	10.3.92.54 – 10.3.92.55	10.3.92.55
29	10.3.92.56/31	10.3.92.56 – 10.3.92.57	10.3.92.57
30	10.3.92.58/31	10.3.92.58 – 10.3.92.59	10.3.92.59
31	10.3.92.60/31	10.3.92.60 – 10.3.92.61	10.3.92.61
32	10.3.92.62/31	10.3.92.62 – 10.3.92.63	10.3.92.63
33	10.3.92.64/31	10.3.92.64 – 10.3.92.65	10.3.92.65
34	10.3.92.66/31	10.3.92.66 – 10.3.92.67	10.3.92.67
35	10.3.92.68/31	10.3.92.68 – 10.3.92.69	10.3.92.69
36	10.3.92.70/31	10.3.92.70 – 10.3.92.71	10.3.92.71
37	10.3.92.72/31	10.3.92.72 – 10.3.92.73	10.3.92.73
38	10.3.92.74/31	10.3.92.74 – 10.3.92.75	10.3.92.75
39	10.3.92.76/31	10.3.92.76 – 10.3.92.77	10.3.92.77
40	10.3.92.78/31	10.3.92.78 – 10.3.92.79	10.3.92.79
41	10.3.92.80/31	10.3.92.80 – 10.3.92.81	10.3.92.81
42	10.3.92.82/31	10.3.92.82 – 10.3.92.83	10.3.92.83
43	10.3.92.84/31	10.3.92.84 – 10.3.92.85	10.3.92.85
44	10.3.92.86/31	10.3.92.86 – 10.3.92.87	10.3.92.87
45	10.3.92.88/31	10.3.92.88 – 10.3.92.89	10.3.92.89
46	10.3.92.90/31	10.3.92.90 – 10.3.92.91	10.3.92.91
47	10.3.92.92/31	10.3.92.92 – 10.3.92.93	10.3.92.93
48	10.3.92.94/31	10.3.92.94 – 10.3.92.95	10.3.92.95
49	10.3.92.96/31	10.3.92.96 – 10.3.92.97	10.3.92.97
50	10.3.92.98/31	10.3.92.98 – 10.3.92.99	10.3.92.99
51	10.3.92.100/31	10.3.92.100 – 10.3.92.101	10.3.92.101
52	10.3.92.102/31	10.3.92.102 – 10.3.92.103	10.3.92.103
53	10.3.92.104/31	10.3.92.104 – 10.3.92.105	10.3.92.105
54	10.3.92.106/31	10.3.92.106 – 10.3.92.107	10.3.92.107
55	10.3.92.108/31	10.3.92.108 – 10.3.92.109	10.3.92.109
56	10.3.92.110/31	10.3.92.110 – 10.3.92.111	10.3.92.111
57	10.3.92.112/31	10.3.92.112 – 10.3.92.113	10.3.92.113
58	10.3.92.114/31	10.3.92.114 – 10.3.92.115	10.3.92.115
59	10.3.92.116/31	10.3.92.116 – 10.3.92.117	10.3.92.117
60	10.3.92.118/31	10.3.92.118 – 10.3.92.119	10.3.92.119
61	10.3.92.120/31	10.3.92.120 – 10.3.92.121	10.3.92.121
62	10.3.92.122/31	10.3.92.122 – 10.3.92.123	10.3.92.123
63	10.3.92.124/31	10.3.92.124 – 10.3.92.125	10.3.92.125
64	10.3.92.126/31	10.3.92.126 – 10.3.92.127	10.3.92.127
65	10.3.92.128/31	10.3.92.128 – 10.3.92.129	10.3.92.129
66	10.3.92.130/31	10.3.92.130 – 10.3.92.131	10.3.92.131
67	10.3.92.132/31	10.3.92.132 – 10.3.92.133	10.3.92.133
68	10.3.92.134/31	10.3.92.134 – 10.3.92.135	10.3.92.135
69	10.3.92.136/31	10.3.92.136 – 10.3.92.137	10.3.92.137
70	10.3.92.138/31	10.3.92.138 – 10.3.92.139	10.3.92.139
71	10.3.92.140/31	10.3.92.140 – 10.3.92.141	10.3.92.141
72	10.3.92.142/31	10.3.92.142 – 10.3.92.143	10.3.92.143
73	10.3.92.144/31	10.3.92.144 – 10.3.92.145	10.3.92.145
74	10.3.92.146/31	10.3.92.146 – 10.3.92.147	10.3.92.147
75	10.3.92.148/31	10.3.92.148 – 10.3.92.149	10.3.92.149
76	10.3.92.150/31	10.3.92.150 – 10.3.92.151	10.3.92.151
77	10.3.92.152/31	10.3.92.152 – 10.3.92.153	10.3.92.153
78	10.3.92.154/31	10.3.92.154 – 10.3.92.155	10.3.92.155
79	10.3.92.156/31	10.3.92.156 – 10.3.92.157	10.3.92.157
80	10.3.92.158/31	10.3.92.158 – 10.3.92.159	10.3.92.159
81	10.3.92.160/31	10.3.92.160 – 10.3.92.161	10.3.92.161
82	10.3.92.162/31	10.3.92.162 – 10.3.92.163	10.3.92.163
83	10.3.92.164/31	10.3.92.164 – 10.3.92.165	10.3.92.165
84	10.3.92.166/31	10.3.92.166 – 10.3.92.167	10.3.92.167
85	10.3.92.168/31	10.3.92.168 – 10.3.92.169	10.3.92.169
86	10.3.92.170/31	10.3.92.170 – 10.3.92.171	10.3.92.171
87	10.3.92.172/31	10.3.92.172 – 10.3.92.173	10.3.92.173
88	10.3.92.174/31	10.3.92.174 – 10.3.92.175	10.3.92.175
89	10.3.92.176/31	10.3.92.176 – 10.3.92.177	10.3.92.177
90	10.3.92.178/31	10.3.92.178 – 10.3.92.179	10.3.92.179
91	10.3.92.180/31	10.3.92.180 – 10.3.92.181	10.3.92.181
92	10.3.92.182/31	10.3.92.182 – 10.3.92.183	10.3.92.183
93	10.3.92.184/31	10.3.92.184 – 10.3.92.185	10.3.92.185
94	10.3.92.186/31	10.3.92.186 – 10.3.92.187	10.3.92.187
95	10.3.92.188/31	10.3.92.188 – 10.3.92.189	10.3.92.189
96	10.3.92.190/31	10.3.92.190 – 10.3.92.191	10.3.92.191
97	10.3.92.192/31	10.3.92.192 – 10.3.92.193	10.3.92.193
98	10.3.92.194/31	10.3.92.194 – 10.3.92.195	10.3.92.195
99	10.3.92.196/31	10.3.92.196 – 10.3.92.197	10.3.92.197
100	10.3.92.198/31	10.3.92.198 – 10.3.92.199	10.3.92.199
101	10.3.92.200/31	10.3.92.200 – 10.3.92.201	10.3.92.201
102	10.3.92.202/31	10.3.92.202 – 10.3.92.203	10.3.92.203
103	10.3.92.204/31	10.3.92.204 – 10.3.92.205	10.3.92.205
104	10.3.92.206/31	10.3.92.206 – 10.3.92.207	10.3.92.207
105	10.3.92.208/31	10.3.92.208 – 10.3.92.209	10.3.92.209
106	10.3.92.210/31	10.3.92.210 – 10.3.92.211	10.3.92.211
107	10.3.92.212/31	10.3.92.212 – 10.3.92.213	10.3.92.213
108	10.3.92.214/31	10.3.92.214 – 10.3.92.215	10.3.92.215
109	10.3.92.216/31	10.3.92.216 – 10.3.92.217	10.3.92.217
110	10.3.92.218/31	10.3.92.218 – 10.3.92.219	10.3.92.219
111	10.3.92.220/31	10.3.92.220 – 10.3.92.221	10.3.92.221
112	10.3.92.222/31	10.3.92.222 – 10.3.92.223	10.3.92.223
113	10.3.92.224/31	10.3.92.224 – 10.3.92.225	10.3.92.225
114	10.3.92.226/31	10.3.92.226 – 10.3.92.227	10.3.92.227
115	10.3.92.228/31	10.3.92.228 – 10.3.92.229	10.3.92.229
116	10.3.92.230/31	10.3.92.230 – 10.3.92.231	10.3.92.231
117	10.3.92.232/31	10.3.92.232 – 10.3.92.233	10.3.92.233
118	10.3.92.234/31	10.3.92.234 – 10.3.92.235	10.3.92.235
119	10.3.92.236/31	10.3.92.236 – 10.3.92.237	10.3.92.237
120	10.3.92.238/31	10.3.92.238 – 10.3.92.239	10.3.92.239
121	10.3.92.240/31	10.3.92.240 – 10.3.92.241	10.3.92.241
122	10.3.92.242/31	10.3.92.242 – 10.3.92.243	10.3.92.243
123	10.3.92.244/31	10.3.92.244 – 10.3.92.245	10.3.92.245
124	10.3.92.246/31	10.3.92.246 – 10.3.92.247	10.3.92.247
125	10.3.92.248/31	10.3.92.248 – 10.3.92.249	10.3.92.249
126	10.3.92.250/31	10.3.92.250 – 10.3.92.251	10.3.92.251
127	10.3.92.252/31	10.3.92.252 – 10.3.92.253	10.3.92.253
128	10.3.92.254/31	10.3.92.254 – 10.3.92.255	10.3.92.255
129	10.3.93.0/31	10.3.93.0 – 10.3.93.1	10.3.93.1
130	10.3.93.2/31	10.3.93.2 – 10.3.93.3	10.3.93.3
131	10.3.93.4/31	10.3.93.4 – 10.3.93.5	10.3.93.5
132	10.3.93.6/31	10.3.93.6 – 10.3.93.7	10.3.93.7
133	10.3.93.8/31	10.3.93.8 – 10.3.93.9	10.3.93.9
134	10.3.93.10/31	10.3.93.10 – 10.3.93.11	10.3.93.11
135	10.3.93.12/31	10.3.93.12 – 10.3.93.13	10.3.93.13
136	10.3.93.14/31	10.3.93.14 – 10.3.93.15	10.3.93.15
137	10.3.93.16/31	10.3.93.16 – 10.3.93.17	10.3.93.17
138	10.3.93.18/31	10.3.93.18 – 10.3.93.19	10.3.93.19
139	10.3.93.20/31	10.3.93.20 – 10.3.93.21	10.3.93.21
140	10.3.93.22/31	10.3.93.22 – 10.3.93.23	10.3.93.23
141	10.3.93.24/31	10.3.93.24 – 10.3.93.25	10.3.93.25
142	10.3.93.26/31	10.3.93.26 – 10.3.93.27	10.3.93.27
143	10.3.93.28/31	10.3.93.28 – 10.3.93.29	10.3.93.29
144	10.3.93.30/31	10.3.93.30 – 10.3.93.31	10.3.93.31
145	10.3.93.32/31	10.3.93.32 – 10.3.93.33	10.3.93.33
146	10.3.93.34/31	10.3.93.34 – 10.3.93.35	10.3.93.35
147	10.3.93.36/31	10.3.93.36 – 10.3.93.37	10.3.93.37
148	10.3.93.38/31	10.3.93.38 – 10.3.93.39	10.3.93.39
149	10.3.93.40/31	10.3.93.40 – 10.3.93.41	10.3.93.41
150	10.3.93.42/31	10.3.93.42 – 10.3.93.43	10.3.93.43
151	10.3.93.44/31	10.3.93.44 – 10.3.93.45	10.3.93.45
152	10.3.93.46/31	10.3.93.46 – 10.3.93.47	10.3.93.47
153	10.3.93.48/31	10.3.93.48 – 10.3.93.49	10.3.93.49
154	10.3.93.50/31	10.3.93.50 – 10.3.93.51	10.3.93.51
155	10.3.93.52/31	10.3.93.52 – 10.3.93.53	10.3.93.53
156	10.3.93.54/31	10.3.93.54 – 10.3.93.55	10.3.93.55
157	10.3.93.56/31	10.3.93.56 – 10.3.93.57	10.3.93.57
158	10.3.93.58/31	10.3.93.58 – 10.3.93.59	10.3.93.59
159	10.3.93.60/31	10.3.93.60 – 10.3.93.61	10.3.93.61
160	10.3.93.62/31	10.3.93.62 – 10.3.93.63	10.3.93.63
161	10.3.93.64/31	10.3.93.64 – 10.3.93.65	10.3.93.65
162	10.3.93.66/31	10.3.93.66 – 10.3.93.67	10.3.93.67
163	10.3.93.68/31	10.3.93.68 – 10.3.93.69	10.3.93.69
164	10.3.93.70/31	10.3.93.70 – 10.3.93.71	10.3.93.71
165	10.3.93.72/31	10.3.93.72 – 10.3.93.73	10.3.93.73
166	10.3.93.74/31	10.3.93.74 – 10.3.93.75	10.3.93.75
167	10.3.93.76/31	10.3.93.76 – 10.3.93.77	10.3.93.77
168	10.3.93.78/31	10.3.93.78 – 10.3.93.79	10.3.93.79
169	10.3.93.80/31	10.3.93.80 – 10.3.93.81	10.3.93.81
170	10.3.93.82/31	10.3.93.82 – 10.3.93.83	10.3.93.83
171	10.3.93.84/31	10.3.93.84 – 10.3.93.85	10.3.93.85
172	10.3.93.86/31	10.3.93.86 – 10.3.93.87	10.3.93.87
173	10.3.93.88/31	10.3.93.88 – 10.3.93.89	10.3.93.89
174	10.3.93.90/31	10.3.93.90 – 10.3.93.91	10.3.93.91
175	10.3.93.92/31	10.3.93.92 – 10.3.93.93	10.3.93.93
176	10.3.93.94/31	10.3.93.94 – 10.3.93.95	10.3.93.95
177	10.3.93.96/31	10.3.93.96 – 10.3.93.97	10.3.93.97
178	10.3.93.98/31	10.3.93.98 – 10.3.93.99	10.3.93.99
179	10.3.93.100/31	10.3.93.100 – 10.3.93.101	10.3.93.101
180	10.3.93.102/31	10.3.93.102 – 10.3.93.103	10.3.93.103
181	10.3.93.104/31	10.3.93.104 – 10.3.93.105	10.3.93.105
182	10.3.93.106/31	10.3.93.106 – 10.3.93.107	10.3.93.107
183	10.3.93.108/31	10.3.93.108 – 10.3.93.109	10.3.93.109
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186	10.3.93.114/31	10.3.93.114 – 10.3.93.115	10.3.93.115
187	10.3.93.116/31	10.3.93.116 – 10.3.93.117	10.3.93.117
188	10.3.93.118/31	10.3.93.118 – 10.3.93.119	10.3.93.119
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196	10.3.93.134/31	10.3.93.134 – 10.3.93.135	10.3.93.135
197	10.3.93.136/31	10.3.93.136 – 10.3.93.137	10.3.93.137
198	10.3.93.138/31	10.3.93.138 – 10.3.93.139	10.3.93.139
199	10.3.93.140/31	10.3.93.140 – 10.3.93.141	10.3.93.141
200	10.3.93.142/31	10.3.93.142 – 10.3.93.143	10.3.93.143
201	10.3.93.144/31	10.3.93.144 – 10.3.93.145	10.3.93.145
202	10.3.93.146/31	10.3.93.146 – 10.3.93.147	10.3.93.147
203	10.3.93.148/31	10.3.93.148 – 10.3.93.149	10.3.93.149
204	10.3.93.150/31	10.3.93.150 – 10.3.93.151	10.3.93.151
205	10.3.93.152/31	10.3.93.152 – 10.3.93.153	10.3.93.153
206	10.3.93.154/31	10.3.93.154 – 10.3.93.155	10.3.93.155
207	10.3.93.156/31	10.3.93.156 – 10.3.93.157	10.3.93.157
208	10.3.93.158/31	10.3.93.158 – 10.3.93.159	10.3.93.159
209	10.3.93.160/31	10.3.93.160 – 10.3.93.161	10.3.93.161
210	10.3.93.162/31	10.3.93.162 – 10.3.93.163	10.3.93.163
211	10.3.93.164/31	10.3.93.164 – 10.3.93.165	10.3.93.165
212	10.3.93.166/31	10.3.93.166 – 10.3.93.167	10.3.93.167
213	10.3.93.168/31	10.3.93.168 – 10.3.93.169	10.3.93.169
214	10.3.93.170/31	10.3.93.170 – 10.3.93.171	10.3.93.171
215	10.3.93.172/31	10.3.93.172 – 10.3.93.173	10.3.93.173
216	10.3.93.174/31	10.3.93.174 – 10.3.93.175	10.3.93.175
217	10.3.93.176/31	10.3.93.176 – 10.3.93.177	10.3.93.177
218	10.3.93.178/31	10.3.93.178 – 10.3.93.179	10.3.93.179
219	10.3.93.180/31	10.3.93.180 – 10.3.93.181	10.3.93.181
220	10.3.93.182/31	10.3.93.182 – 10.3.93.183	10.3.93.183
221	10.3.93.184/31	10.3.93.184 – 10.3.93.185	10.3.93.185
222	10.3.93.186/31	10.3.93.186 – 10.3.93.187	10.3.93.187
223	10.3.93.188/31	10.3.93.188 – 10.3.93.189	10.3.93.189
224	10.3.93.190/31	10.3.93.190 – 10.3.93.191	10.3.93.191
225	10.3.93.192/31	10.3.93.192 – 10.3.93.193	10.3.93.193
226	10.3.93.194/31	10.3.93.194 – 10.3.93.195	10.3.93.195
227	10.3.93.196/31	10.3.93.196 – 10.3.93.197	10.3.93.197
228	10.3.93.198/31	10.3.93.198 – 10.3.93.199	10.3.93.199
229	10.3.93.200/31	10.3.93.200 – 10.3.93.201	10.3.93.201
230	10.3.93.202/31	10.3.93.202 – 10.3.93.203	10.3.93.203
231	10.3.93.204/31	10.3.93.204 – 10.3.93.205	10.3.93.205
232	10.3.93.206/31	10.3.93.206 – 10.3.93.207	10.3.93.207
233	10.3.93.208/31	10.3.93.208 – 10.3.93.209	10.3.93.209
234	10.3.93.210/31	10.3.93.210 – 10.3.93.211	10.3.93.211
235	10.3.93.212/31	10.3.93.212 – 10.3.93.213	10.3.93.213
236	10.3.93.214/31	10.3.93.214 – 10.3.93.215	10.3.93.215
237	10.3.93.216/31	10.3.93.216 – 10.3.93.217	10.3.93.217
238	10.3.93.218/31	10.3.93.218 – 10.3.93.219	10.3.93.219
239	10.3.93.220/31	10.3.93.220 – 10.3.93.221	10.3.93.221
240	10.3.93.222/31	10.3.93.222 – 10.3.93.223	10.3.93.223
241	10.3.93.224/31	10.3.93.224 – 10.3.93.225	10.3.93.225
242	10.3.93.226/31	10.3.93.226 – 10.3.93.227	10.3.93.227
243	10.3.93.228/31	10.3.93.228 – 10.3.93.229	10.3.93.229
244	10.3.93.230/31	10.3.93.230 – 10.3.93.231	10.3.93.231
245	10.3.93.232/31	10.3.93.232 – 10.3.93.233	10.3.93.233
246	10.3.93.234/31	10.3.93.234 – 10.3.93.235	10.3.93.235
247	10.3.93.236/31	10.3.93.236 – 10.3.93.237	10.3.93.237
248	10.3.93.238/31	10.3.93.238 – 10.3.93.239	10.3.93.239
249	10.3.93.240/31	10.3.93.240 – 10.3.93.241	10.3.93.241
250	10.3.93.242/31	10.3.93.242 – 10.3.93.243	10.3.93.243
251	10.3.93.244/31	10.3.93.244 – 10.3.93.245	10.3.93.245
252	10.3.93.246/31	10.3.93.246 – 10.3.93.247	10.3.93.247
253	10.3.93.248/31	10.3.93.248 – 10.3.93.249	10.3.93.249
254	10.3.93.250/31	10.3.93.250 – 10.3.93.251	10.3.93.251
255	10.3.93.252/31	10.3.93.252 – 10.3.93.253	10.3.93.253
256	10.3.93.254/31	10.3.93.254 – 10.3.93.255	10.3.93.255

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 →