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)10.231.52.0/22

network10.231.52.0/22

broadcast10.231.55.255

first host10.231.52.1

last host10.231.55.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.231.52.0/22

address00001010.11100111.00110100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.11100111.00110100.00000000

broadcast00001010.11100111.00110111.11111111

green = network part, grey = host part

hex0x0ae73400

decimal182924288

reverse dns0.52.231.10.in-addr.arpa

ipv4-mapped::ffff:ae7:3400

/22 split into /31 · 512 subnets

close ×

#	network	host range	broadcast
1	10.231.52.0/31	10.231.52.0 – 10.231.52.1	10.231.52.1
2	10.231.52.2/31	10.231.52.2 – 10.231.52.3	10.231.52.3
3	10.231.52.4/31	10.231.52.4 – 10.231.52.5	10.231.52.5
4	10.231.52.6/31	10.231.52.6 – 10.231.52.7	10.231.52.7
5	10.231.52.8/31	10.231.52.8 – 10.231.52.9	10.231.52.9
6	10.231.52.10/31	10.231.52.10 – 10.231.52.11	10.231.52.11
7	10.231.52.12/31	10.231.52.12 – 10.231.52.13	10.231.52.13
8	10.231.52.14/31	10.231.52.14 – 10.231.52.15	10.231.52.15
9	10.231.52.16/31	10.231.52.16 – 10.231.52.17	10.231.52.17
10	10.231.52.18/31	10.231.52.18 – 10.231.52.19	10.231.52.19
11	10.231.52.20/31	10.231.52.20 – 10.231.52.21	10.231.52.21
12	10.231.52.22/31	10.231.52.22 – 10.231.52.23	10.231.52.23
13	10.231.52.24/31	10.231.52.24 – 10.231.52.25	10.231.52.25
14	10.231.52.26/31	10.231.52.26 – 10.231.52.27	10.231.52.27
15	10.231.52.28/31	10.231.52.28 – 10.231.52.29	10.231.52.29
16	10.231.52.30/31	10.231.52.30 – 10.231.52.31	10.231.52.31
17	10.231.52.32/31	10.231.52.32 – 10.231.52.33	10.231.52.33
18	10.231.52.34/31	10.231.52.34 – 10.231.52.35	10.231.52.35
19	10.231.52.36/31	10.231.52.36 – 10.231.52.37	10.231.52.37
20	10.231.52.38/31	10.231.52.38 – 10.231.52.39	10.231.52.39
21	10.231.52.40/31	10.231.52.40 – 10.231.52.41	10.231.52.41
22	10.231.52.42/31	10.231.52.42 – 10.231.52.43	10.231.52.43
23	10.231.52.44/31	10.231.52.44 – 10.231.52.45	10.231.52.45
24	10.231.52.46/31	10.231.52.46 – 10.231.52.47	10.231.52.47
25	10.231.52.48/31	10.231.52.48 – 10.231.52.49	10.231.52.49
26	10.231.52.50/31	10.231.52.50 – 10.231.52.51	10.231.52.51
27	10.231.52.52/31	10.231.52.52 – 10.231.52.53	10.231.52.53
28	10.231.52.54/31	10.231.52.54 – 10.231.52.55	10.231.52.55
29	10.231.52.56/31	10.231.52.56 – 10.231.52.57	10.231.52.57
30	10.231.52.58/31	10.231.52.58 – 10.231.52.59	10.231.52.59
31	10.231.52.60/31	10.231.52.60 – 10.231.52.61	10.231.52.61
32	10.231.52.62/31	10.231.52.62 – 10.231.52.63	10.231.52.63
33	10.231.52.64/31	10.231.52.64 – 10.231.52.65	10.231.52.65
34	10.231.52.66/31	10.231.52.66 – 10.231.52.67	10.231.52.67
35	10.231.52.68/31	10.231.52.68 – 10.231.52.69	10.231.52.69
36	10.231.52.70/31	10.231.52.70 – 10.231.52.71	10.231.52.71
37	10.231.52.72/31	10.231.52.72 – 10.231.52.73	10.231.52.73
38	10.231.52.74/31	10.231.52.74 – 10.231.52.75	10.231.52.75
39	10.231.52.76/31	10.231.52.76 – 10.231.52.77	10.231.52.77
40	10.231.52.78/31	10.231.52.78 – 10.231.52.79	10.231.52.79
41	10.231.52.80/31	10.231.52.80 – 10.231.52.81	10.231.52.81
42	10.231.52.82/31	10.231.52.82 – 10.231.52.83	10.231.52.83
43	10.231.52.84/31	10.231.52.84 – 10.231.52.85	10.231.52.85
44	10.231.52.86/31	10.231.52.86 – 10.231.52.87	10.231.52.87
45	10.231.52.88/31	10.231.52.88 – 10.231.52.89	10.231.52.89
46	10.231.52.90/31	10.231.52.90 – 10.231.52.91	10.231.52.91
47	10.231.52.92/31	10.231.52.92 – 10.231.52.93	10.231.52.93
48	10.231.52.94/31	10.231.52.94 – 10.231.52.95	10.231.52.95
49	10.231.52.96/31	10.231.52.96 – 10.231.52.97	10.231.52.97
50	10.231.52.98/31	10.231.52.98 – 10.231.52.99	10.231.52.99
51	10.231.52.100/31	10.231.52.100 – 10.231.52.101	10.231.52.101
52	10.231.52.102/31	10.231.52.102 – 10.231.52.103	10.231.52.103
53	10.231.52.104/31	10.231.52.104 – 10.231.52.105	10.231.52.105
54	10.231.52.106/31	10.231.52.106 – 10.231.52.107	10.231.52.107
55	10.231.52.108/31	10.231.52.108 – 10.231.52.109	10.231.52.109
56	10.231.52.110/31	10.231.52.110 – 10.231.52.111	10.231.52.111
57	10.231.52.112/31	10.231.52.112 – 10.231.52.113	10.231.52.113
58	10.231.52.114/31	10.231.52.114 – 10.231.52.115	10.231.52.115
59	10.231.52.116/31	10.231.52.116 – 10.231.52.117	10.231.52.117
60	10.231.52.118/31	10.231.52.118 – 10.231.52.119	10.231.52.119
61	10.231.52.120/31	10.231.52.120 – 10.231.52.121	10.231.52.121
62	10.231.52.122/31	10.231.52.122 – 10.231.52.123	10.231.52.123
63	10.231.52.124/31	10.231.52.124 – 10.231.52.125	10.231.52.125
64	10.231.52.126/31	10.231.52.126 – 10.231.52.127	10.231.52.127
65	10.231.52.128/31	10.231.52.128 – 10.231.52.129	10.231.52.129
66	10.231.52.130/31	10.231.52.130 – 10.231.52.131	10.231.52.131
67	10.231.52.132/31	10.231.52.132 – 10.231.52.133	10.231.52.133
68	10.231.52.134/31	10.231.52.134 – 10.231.52.135	10.231.52.135
69	10.231.52.136/31	10.231.52.136 – 10.231.52.137	10.231.52.137
70	10.231.52.138/31	10.231.52.138 – 10.231.52.139	10.231.52.139
71	10.231.52.140/31	10.231.52.140 – 10.231.52.141	10.231.52.141
72	10.231.52.142/31	10.231.52.142 – 10.231.52.143	10.231.52.143
73	10.231.52.144/31	10.231.52.144 – 10.231.52.145	10.231.52.145
74	10.231.52.146/31	10.231.52.146 – 10.231.52.147	10.231.52.147
75	10.231.52.148/31	10.231.52.148 – 10.231.52.149	10.231.52.149
76	10.231.52.150/31	10.231.52.150 – 10.231.52.151	10.231.52.151
77	10.231.52.152/31	10.231.52.152 – 10.231.52.153	10.231.52.153
78	10.231.52.154/31	10.231.52.154 – 10.231.52.155	10.231.52.155
79	10.231.52.156/31	10.231.52.156 – 10.231.52.157	10.231.52.157
80	10.231.52.158/31	10.231.52.158 – 10.231.52.159	10.231.52.159
81	10.231.52.160/31	10.231.52.160 – 10.231.52.161	10.231.52.161
82	10.231.52.162/31	10.231.52.162 – 10.231.52.163	10.231.52.163
83	10.231.52.164/31	10.231.52.164 – 10.231.52.165	10.231.52.165
84	10.231.52.166/31	10.231.52.166 – 10.231.52.167	10.231.52.167
85	10.231.52.168/31	10.231.52.168 – 10.231.52.169	10.231.52.169
86	10.231.52.170/31	10.231.52.170 – 10.231.52.171	10.231.52.171
87	10.231.52.172/31	10.231.52.172 – 10.231.52.173	10.231.52.173
88	10.231.52.174/31	10.231.52.174 – 10.231.52.175	10.231.52.175
89	10.231.52.176/31	10.231.52.176 – 10.231.52.177	10.231.52.177
90	10.231.52.178/31	10.231.52.178 – 10.231.52.179	10.231.52.179
91	10.231.52.180/31	10.231.52.180 – 10.231.52.181	10.231.52.181
92	10.231.52.182/31	10.231.52.182 – 10.231.52.183	10.231.52.183
93	10.231.52.184/31	10.231.52.184 – 10.231.52.185	10.231.52.185
94	10.231.52.186/31	10.231.52.186 – 10.231.52.187	10.231.52.187
95	10.231.52.188/31	10.231.52.188 – 10.231.52.189	10.231.52.189
96	10.231.52.190/31	10.231.52.190 – 10.231.52.191	10.231.52.191
97	10.231.52.192/31	10.231.52.192 – 10.231.52.193	10.231.52.193
98	10.231.52.194/31	10.231.52.194 – 10.231.52.195	10.231.52.195
99	10.231.52.196/31	10.231.52.196 – 10.231.52.197	10.231.52.197
100	10.231.52.198/31	10.231.52.198 – 10.231.52.199	10.231.52.199
101	10.231.52.200/31	10.231.52.200 – 10.231.52.201	10.231.52.201
102	10.231.52.202/31	10.231.52.202 – 10.231.52.203	10.231.52.203
103	10.231.52.204/31	10.231.52.204 – 10.231.52.205	10.231.52.205
104	10.231.52.206/31	10.231.52.206 – 10.231.52.207	10.231.52.207
105	10.231.52.208/31	10.231.52.208 – 10.231.52.209	10.231.52.209
106	10.231.52.210/31	10.231.52.210 – 10.231.52.211	10.231.52.211
107	10.231.52.212/31	10.231.52.212 – 10.231.52.213	10.231.52.213
108	10.231.52.214/31	10.231.52.214 – 10.231.52.215	10.231.52.215
109	10.231.52.216/31	10.231.52.216 – 10.231.52.217	10.231.52.217
110	10.231.52.218/31	10.231.52.218 – 10.231.52.219	10.231.52.219
111	10.231.52.220/31	10.231.52.220 – 10.231.52.221	10.231.52.221
112	10.231.52.222/31	10.231.52.222 – 10.231.52.223	10.231.52.223
113	10.231.52.224/31	10.231.52.224 – 10.231.52.225	10.231.52.225
114	10.231.52.226/31	10.231.52.226 – 10.231.52.227	10.231.52.227
115	10.231.52.228/31	10.231.52.228 – 10.231.52.229	10.231.52.229
116	10.231.52.230/31	10.231.52.230 – 10.231.52.231	10.231.52.231
117	10.231.52.232/31	10.231.52.232 – 10.231.52.233	10.231.52.233
118	10.231.52.234/31	10.231.52.234 – 10.231.52.235	10.231.52.235
119	10.231.52.236/31	10.231.52.236 – 10.231.52.237	10.231.52.237
120	10.231.52.238/31	10.231.52.238 – 10.231.52.239	10.231.52.239
121	10.231.52.240/31	10.231.52.240 – 10.231.52.241	10.231.52.241
122	10.231.52.242/31	10.231.52.242 – 10.231.52.243	10.231.52.243
123	10.231.52.244/31	10.231.52.244 – 10.231.52.245	10.231.52.245
124	10.231.52.246/31	10.231.52.246 – 10.231.52.247	10.231.52.247
125	10.231.52.248/31	10.231.52.248 – 10.231.52.249	10.231.52.249
126	10.231.52.250/31	10.231.52.250 – 10.231.52.251	10.231.52.251
127	10.231.52.252/31	10.231.52.252 – 10.231.52.253	10.231.52.253
128	10.231.52.254/31	10.231.52.254 – 10.231.52.255	10.231.52.255
129	10.231.53.0/31	10.231.53.0 – 10.231.53.1	10.231.53.1
130	10.231.53.2/31	10.231.53.2 – 10.231.53.3	10.231.53.3
131	10.231.53.4/31	10.231.53.4 – 10.231.53.5	10.231.53.5
132	10.231.53.6/31	10.231.53.6 – 10.231.53.7	10.231.53.7
133	10.231.53.8/31	10.231.53.8 – 10.231.53.9	10.231.53.9
134	10.231.53.10/31	10.231.53.10 – 10.231.53.11	10.231.53.11
135	10.231.53.12/31	10.231.53.12 – 10.231.53.13	10.231.53.13
136	10.231.53.14/31	10.231.53.14 – 10.231.53.15	10.231.53.15
137	10.231.53.16/31	10.231.53.16 – 10.231.53.17	10.231.53.17
138	10.231.53.18/31	10.231.53.18 – 10.231.53.19	10.231.53.19
139	10.231.53.20/31	10.231.53.20 – 10.231.53.21	10.231.53.21
140	10.231.53.22/31	10.231.53.22 – 10.231.53.23	10.231.53.23
141	10.231.53.24/31	10.231.53.24 – 10.231.53.25	10.231.53.25
142	10.231.53.26/31	10.231.53.26 – 10.231.53.27	10.231.53.27
143	10.231.53.28/31	10.231.53.28 – 10.231.53.29	10.231.53.29
144	10.231.53.30/31	10.231.53.30 – 10.231.53.31	10.231.53.31
145	10.231.53.32/31	10.231.53.32 – 10.231.53.33	10.231.53.33
146	10.231.53.34/31	10.231.53.34 – 10.231.53.35	10.231.53.35
147	10.231.53.36/31	10.231.53.36 – 10.231.53.37	10.231.53.37
148	10.231.53.38/31	10.231.53.38 – 10.231.53.39	10.231.53.39
149	10.231.53.40/31	10.231.53.40 – 10.231.53.41	10.231.53.41
150	10.231.53.42/31	10.231.53.42 – 10.231.53.43	10.231.53.43
151	10.231.53.44/31	10.231.53.44 – 10.231.53.45	10.231.53.45
152	10.231.53.46/31	10.231.53.46 – 10.231.53.47	10.231.53.47
153	10.231.53.48/31	10.231.53.48 – 10.231.53.49	10.231.53.49
154	10.231.53.50/31	10.231.53.50 – 10.231.53.51	10.231.53.51
155	10.231.53.52/31	10.231.53.52 – 10.231.53.53	10.231.53.53
156	10.231.53.54/31	10.231.53.54 – 10.231.53.55	10.231.53.55
157	10.231.53.56/31	10.231.53.56 – 10.231.53.57	10.231.53.57
158	10.231.53.58/31	10.231.53.58 – 10.231.53.59	10.231.53.59
159	10.231.53.60/31	10.231.53.60 – 10.231.53.61	10.231.53.61
160	10.231.53.62/31	10.231.53.62 – 10.231.53.63	10.231.53.63
161	10.231.53.64/31	10.231.53.64 – 10.231.53.65	10.231.53.65
162	10.231.53.66/31	10.231.53.66 – 10.231.53.67	10.231.53.67
163	10.231.53.68/31	10.231.53.68 – 10.231.53.69	10.231.53.69
164	10.231.53.70/31	10.231.53.70 – 10.231.53.71	10.231.53.71
165	10.231.53.72/31	10.231.53.72 – 10.231.53.73	10.231.53.73
166	10.231.53.74/31	10.231.53.74 – 10.231.53.75	10.231.53.75
167	10.231.53.76/31	10.231.53.76 – 10.231.53.77	10.231.53.77
168	10.231.53.78/31	10.231.53.78 – 10.231.53.79	10.231.53.79
169	10.231.53.80/31	10.231.53.80 – 10.231.53.81	10.231.53.81
170	10.231.53.82/31	10.231.53.82 – 10.231.53.83	10.231.53.83
171	10.231.53.84/31	10.231.53.84 – 10.231.53.85	10.231.53.85
172	10.231.53.86/31	10.231.53.86 – 10.231.53.87	10.231.53.87
173	10.231.53.88/31	10.231.53.88 – 10.231.53.89	10.231.53.89
174	10.231.53.90/31	10.231.53.90 – 10.231.53.91	10.231.53.91
175	10.231.53.92/31	10.231.53.92 – 10.231.53.93	10.231.53.93
176	10.231.53.94/31	10.231.53.94 – 10.231.53.95	10.231.53.95
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180	10.231.53.102/31	10.231.53.102 – 10.231.53.103	10.231.53.103
181	10.231.53.104/31	10.231.53.104 – 10.231.53.105	10.231.53.105
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183	10.231.53.108/31	10.231.53.108 – 10.231.53.109	10.231.53.109
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186	10.231.53.114/31	10.231.53.114 – 10.231.53.115	10.231.53.115
187	10.231.53.116/31	10.231.53.116 – 10.231.53.117	10.231.53.117
188	10.231.53.118/31	10.231.53.118 – 10.231.53.119	10.231.53.119
189	10.231.53.120/31	10.231.53.120 – 10.231.53.121	10.231.53.121
190	10.231.53.122/31	10.231.53.122 – 10.231.53.123	10.231.53.123
191	10.231.53.124/31	10.231.53.124 – 10.231.53.125	10.231.53.125
192	10.231.53.126/31	10.231.53.126 – 10.231.53.127	10.231.53.127
193	10.231.53.128/31	10.231.53.128 – 10.231.53.129	10.231.53.129
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196	10.231.53.134/31	10.231.53.134 – 10.231.53.135	10.231.53.135
197	10.231.53.136/31	10.231.53.136 – 10.231.53.137	10.231.53.137
198	10.231.53.138/31	10.231.53.138 – 10.231.53.139	10.231.53.139
199	10.231.53.140/31	10.231.53.140 – 10.231.53.141	10.231.53.141
200	10.231.53.142/31	10.231.53.142 – 10.231.53.143	10.231.53.143
201	10.231.53.144/31	10.231.53.144 – 10.231.53.145	10.231.53.145
202	10.231.53.146/31	10.231.53.146 – 10.231.53.147	10.231.53.147
203	10.231.53.148/31	10.231.53.148 – 10.231.53.149	10.231.53.149
204	10.231.53.150/31	10.231.53.150 – 10.231.53.151	10.231.53.151
205	10.231.53.152/31	10.231.53.152 – 10.231.53.153	10.231.53.153
206	10.231.53.154/31	10.231.53.154 – 10.231.53.155	10.231.53.155
207	10.231.53.156/31	10.231.53.156 – 10.231.53.157	10.231.53.157
208	10.231.53.158/31	10.231.53.158 – 10.231.53.159	10.231.53.159
209	10.231.53.160/31	10.231.53.160 – 10.231.53.161	10.231.53.161
210	10.231.53.162/31	10.231.53.162 – 10.231.53.163	10.231.53.163
211	10.231.53.164/31	10.231.53.164 – 10.231.53.165	10.231.53.165
212	10.231.53.166/31	10.231.53.166 – 10.231.53.167	10.231.53.167
213	10.231.53.168/31	10.231.53.168 – 10.231.53.169	10.231.53.169
214	10.231.53.170/31	10.231.53.170 – 10.231.53.171	10.231.53.171
215	10.231.53.172/31	10.231.53.172 – 10.231.53.173	10.231.53.173
216	10.231.53.174/31	10.231.53.174 – 10.231.53.175	10.231.53.175
217	10.231.53.176/31	10.231.53.176 – 10.231.53.177	10.231.53.177
218	10.231.53.178/31	10.231.53.178 – 10.231.53.179	10.231.53.179
219	10.231.53.180/31	10.231.53.180 – 10.231.53.181	10.231.53.181
220	10.231.53.182/31	10.231.53.182 – 10.231.53.183	10.231.53.183
221	10.231.53.184/31	10.231.53.184 – 10.231.53.185	10.231.53.185
222	10.231.53.186/31	10.231.53.186 – 10.231.53.187	10.231.53.187
223	10.231.53.188/31	10.231.53.188 – 10.231.53.189	10.231.53.189
224	10.231.53.190/31	10.231.53.190 – 10.231.53.191	10.231.53.191
225	10.231.53.192/31	10.231.53.192 – 10.231.53.193	10.231.53.193
226	10.231.53.194/31	10.231.53.194 – 10.231.53.195	10.231.53.195
227	10.231.53.196/31	10.231.53.196 – 10.231.53.197	10.231.53.197
228	10.231.53.198/31	10.231.53.198 – 10.231.53.199	10.231.53.199
229	10.231.53.200/31	10.231.53.200 – 10.231.53.201	10.231.53.201
230	10.231.53.202/31	10.231.53.202 – 10.231.53.203	10.231.53.203
231	10.231.53.204/31	10.231.53.204 – 10.231.53.205	10.231.53.205
232	10.231.53.206/31	10.231.53.206 – 10.231.53.207	10.231.53.207
233	10.231.53.208/31	10.231.53.208 – 10.231.53.209	10.231.53.209
234	10.231.53.210/31	10.231.53.210 – 10.231.53.211	10.231.53.211
235	10.231.53.212/31	10.231.53.212 – 10.231.53.213	10.231.53.213
236	10.231.53.214/31	10.231.53.214 – 10.231.53.215	10.231.53.215
237	10.231.53.216/31	10.231.53.216 – 10.231.53.217	10.231.53.217
238	10.231.53.218/31	10.231.53.218 – 10.231.53.219	10.231.53.219
239	10.231.53.220/31	10.231.53.220 – 10.231.53.221	10.231.53.221
240	10.231.53.222/31	10.231.53.222 – 10.231.53.223	10.231.53.223
241	10.231.53.224/31	10.231.53.224 – 10.231.53.225	10.231.53.225
242	10.231.53.226/31	10.231.53.226 – 10.231.53.227	10.231.53.227
243	10.231.53.228/31	10.231.53.228 – 10.231.53.229	10.231.53.229
244	10.231.53.230/31	10.231.53.230 – 10.231.53.231	10.231.53.231
245	10.231.53.232/31	10.231.53.232 – 10.231.53.233	10.231.53.233
246	10.231.53.234/31	10.231.53.234 – 10.231.53.235	10.231.53.235
247	10.231.53.236/31	10.231.53.236 – 10.231.53.237	10.231.53.237
248	10.231.53.238/31	10.231.53.238 – 10.231.53.239	10.231.53.239
249	10.231.53.240/31	10.231.53.240 – 10.231.53.241	10.231.53.241
250	10.231.53.242/31	10.231.53.242 – 10.231.53.243	10.231.53.243
251	10.231.53.244/31	10.231.53.244 – 10.231.53.245	10.231.53.245
252	10.231.53.246/31	10.231.53.246 – 10.231.53.247	10.231.53.247
253	10.231.53.248/31	10.231.53.248 – 10.231.53.249	10.231.53.249
254	10.231.53.250/31	10.231.53.250 – 10.231.53.251	10.231.53.251
255	10.231.53.252/31	10.231.53.252 – 10.231.53.253	10.231.53.253
256	10.231.53.254/31	10.231.53.254 – 10.231.53.255	10.231.53.255

showing 256 of 512

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →