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)10.0.172.0/22

network10.0.172.0/22

broadcast10.0.175.255

first host10.0.172.1

last host10.0.175.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.0.172.0/22

address00001010.00000000.10101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000000.10101100.00000000

broadcast00001010.00000000.10101111.11111111

green = network part, grey = host part

hex0x0a00ac00

decimal167816192

reverse dns0.172.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:ac00

/22 split into /31 · 512 subnets

close ×

#	network	host range	broadcast
1	10.0.172.0/31	10.0.172.0 – 10.0.172.1	10.0.172.1
2	10.0.172.2/31	10.0.172.2 – 10.0.172.3	10.0.172.3
3	10.0.172.4/31	10.0.172.4 – 10.0.172.5	10.0.172.5
4	10.0.172.6/31	10.0.172.6 – 10.0.172.7	10.0.172.7
5	10.0.172.8/31	10.0.172.8 – 10.0.172.9	10.0.172.9
6	10.0.172.10/31	10.0.172.10 – 10.0.172.11	10.0.172.11
7	10.0.172.12/31	10.0.172.12 – 10.0.172.13	10.0.172.13
8	10.0.172.14/31	10.0.172.14 – 10.0.172.15	10.0.172.15
9	10.0.172.16/31	10.0.172.16 – 10.0.172.17	10.0.172.17
10	10.0.172.18/31	10.0.172.18 – 10.0.172.19	10.0.172.19
11	10.0.172.20/31	10.0.172.20 – 10.0.172.21	10.0.172.21
12	10.0.172.22/31	10.0.172.22 – 10.0.172.23	10.0.172.23
13	10.0.172.24/31	10.0.172.24 – 10.0.172.25	10.0.172.25
14	10.0.172.26/31	10.0.172.26 – 10.0.172.27	10.0.172.27
15	10.0.172.28/31	10.0.172.28 – 10.0.172.29	10.0.172.29
16	10.0.172.30/31	10.0.172.30 – 10.0.172.31	10.0.172.31
17	10.0.172.32/31	10.0.172.32 – 10.0.172.33	10.0.172.33
18	10.0.172.34/31	10.0.172.34 – 10.0.172.35	10.0.172.35
19	10.0.172.36/31	10.0.172.36 – 10.0.172.37	10.0.172.37
20	10.0.172.38/31	10.0.172.38 – 10.0.172.39	10.0.172.39
21	10.0.172.40/31	10.0.172.40 – 10.0.172.41	10.0.172.41
22	10.0.172.42/31	10.0.172.42 – 10.0.172.43	10.0.172.43
23	10.0.172.44/31	10.0.172.44 – 10.0.172.45	10.0.172.45
24	10.0.172.46/31	10.0.172.46 – 10.0.172.47	10.0.172.47
25	10.0.172.48/31	10.0.172.48 – 10.0.172.49	10.0.172.49
26	10.0.172.50/31	10.0.172.50 – 10.0.172.51	10.0.172.51
27	10.0.172.52/31	10.0.172.52 – 10.0.172.53	10.0.172.53
28	10.0.172.54/31	10.0.172.54 – 10.0.172.55	10.0.172.55
29	10.0.172.56/31	10.0.172.56 – 10.0.172.57	10.0.172.57
30	10.0.172.58/31	10.0.172.58 – 10.0.172.59	10.0.172.59
31	10.0.172.60/31	10.0.172.60 – 10.0.172.61	10.0.172.61
32	10.0.172.62/31	10.0.172.62 – 10.0.172.63	10.0.172.63
33	10.0.172.64/31	10.0.172.64 – 10.0.172.65	10.0.172.65
34	10.0.172.66/31	10.0.172.66 – 10.0.172.67	10.0.172.67
35	10.0.172.68/31	10.0.172.68 – 10.0.172.69	10.0.172.69
36	10.0.172.70/31	10.0.172.70 – 10.0.172.71	10.0.172.71
37	10.0.172.72/31	10.0.172.72 – 10.0.172.73	10.0.172.73
38	10.0.172.74/31	10.0.172.74 – 10.0.172.75	10.0.172.75
39	10.0.172.76/31	10.0.172.76 – 10.0.172.77	10.0.172.77
40	10.0.172.78/31	10.0.172.78 – 10.0.172.79	10.0.172.79
41	10.0.172.80/31	10.0.172.80 – 10.0.172.81	10.0.172.81
42	10.0.172.82/31	10.0.172.82 – 10.0.172.83	10.0.172.83
43	10.0.172.84/31	10.0.172.84 – 10.0.172.85	10.0.172.85
44	10.0.172.86/31	10.0.172.86 – 10.0.172.87	10.0.172.87
45	10.0.172.88/31	10.0.172.88 – 10.0.172.89	10.0.172.89
46	10.0.172.90/31	10.0.172.90 – 10.0.172.91	10.0.172.91
47	10.0.172.92/31	10.0.172.92 – 10.0.172.93	10.0.172.93
48	10.0.172.94/31	10.0.172.94 – 10.0.172.95	10.0.172.95
49	10.0.172.96/31	10.0.172.96 – 10.0.172.97	10.0.172.97
50	10.0.172.98/31	10.0.172.98 – 10.0.172.99	10.0.172.99
51	10.0.172.100/31	10.0.172.100 – 10.0.172.101	10.0.172.101
52	10.0.172.102/31	10.0.172.102 – 10.0.172.103	10.0.172.103
53	10.0.172.104/31	10.0.172.104 – 10.0.172.105	10.0.172.105
54	10.0.172.106/31	10.0.172.106 – 10.0.172.107	10.0.172.107
55	10.0.172.108/31	10.0.172.108 – 10.0.172.109	10.0.172.109
56	10.0.172.110/31	10.0.172.110 – 10.0.172.111	10.0.172.111
57	10.0.172.112/31	10.0.172.112 – 10.0.172.113	10.0.172.113
58	10.0.172.114/31	10.0.172.114 – 10.0.172.115	10.0.172.115
59	10.0.172.116/31	10.0.172.116 – 10.0.172.117	10.0.172.117
60	10.0.172.118/31	10.0.172.118 – 10.0.172.119	10.0.172.119
61	10.0.172.120/31	10.0.172.120 – 10.0.172.121	10.0.172.121
62	10.0.172.122/31	10.0.172.122 – 10.0.172.123	10.0.172.123
63	10.0.172.124/31	10.0.172.124 – 10.0.172.125	10.0.172.125
64	10.0.172.126/31	10.0.172.126 – 10.0.172.127	10.0.172.127
65	10.0.172.128/31	10.0.172.128 – 10.0.172.129	10.0.172.129
66	10.0.172.130/31	10.0.172.130 – 10.0.172.131	10.0.172.131
67	10.0.172.132/31	10.0.172.132 – 10.0.172.133	10.0.172.133
68	10.0.172.134/31	10.0.172.134 – 10.0.172.135	10.0.172.135
69	10.0.172.136/31	10.0.172.136 – 10.0.172.137	10.0.172.137
70	10.0.172.138/31	10.0.172.138 – 10.0.172.139	10.0.172.139
71	10.0.172.140/31	10.0.172.140 – 10.0.172.141	10.0.172.141
72	10.0.172.142/31	10.0.172.142 – 10.0.172.143	10.0.172.143
73	10.0.172.144/31	10.0.172.144 – 10.0.172.145	10.0.172.145
74	10.0.172.146/31	10.0.172.146 – 10.0.172.147	10.0.172.147
75	10.0.172.148/31	10.0.172.148 – 10.0.172.149	10.0.172.149
76	10.0.172.150/31	10.0.172.150 – 10.0.172.151	10.0.172.151
77	10.0.172.152/31	10.0.172.152 – 10.0.172.153	10.0.172.153
78	10.0.172.154/31	10.0.172.154 – 10.0.172.155	10.0.172.155
79	10.0.172.156/31	10.0.172.156 – 10.0.172.157	10.0.172.157
80	10.0.172.158/31	10.0.172.158 – 10.0.172.159	10.0.172.159
81	10.0.172.160/31	10.0.172.160 – 10.0.172.161	10.0.172.161
82	10.0.172.162/31	10.0.172.162 – 10.0.172.163	10.0.172.163
83	10.0.172.164/31	10.0.172.164 – 10.0.172.165	10.0.172.165
84	10.0.172.166/31	10.0.172.166 – 10.0.172.167	10.0.172.167
85	10.0.172.168/31	10.0.172.168 – 10.0.172.169	10.0.172.169
86	10.0.172.170/31	10.0.172.170 – 10.0.172.171	10.0.172.171
87	10.0.172.172/31	10.0.172.172 – 10.0.172.173	10.0.172.173
88	10.0.172.174/31	10.0.172.174 – 10.0.172.175	10.0.172.175
89	10.0.172.176/31	10.0.172.176 – 10.0.172.177	10.0.172.177
90	10.0.172.178/31	10.0.172.178 – 10.0.172.179	10.0.172.179
91	10.0.172.180/31	10.0.172.180 – 10.0.172.181	10.0.172.181
92	10.0.172.182/31	10.0.172.182 – 10.0.172.183	10.0.172.183
93	10.0.172.184/31	10.0.172.184 – 10.0.172.185	10.0.172.185
94	10.0.172.186/31	10.0.172.186 – 10.0.172.187	10.0.172.187
95	10.0.172.188/31	10.0.172.188 – 10.0.172.189	10.0.172.189
96	10.0.172.190/31	10.0.172.190 – 10.0.172.191	10.0.172.191
97	10.0.172.192/31	10.0.172.192 – 10.0.172.193	10.0.172.193
98	10.0.172.194/31	10.0.172.194 – 10.0.172.195	10.0.172.195
99	10.0.172.196/31	10.0.172.196 – 10.0.172.197	10.0.172.197
100	10.0.172.198/31	10.0.172.198 – 10.0.172.199	10.0.172.199
101	10.0.172.200/31	10.0.172.200 – 10.0.172.201	10.0.172.201
102	10.0.172.202/31	10.0.172.202 – 10.0.172.203	10.0.172.203
103	10.0.172.204/31	10.0.172.204 – 10.0.172.205	10.0.172.205
104	10.0.172.206/31	10.0.172.206 – 10.0.172.207	10.0.172.207
105	10.0.172.208/31	10.0.172.208 – 10.0.172.209	10.0.172.209
106	10.0.172.210/31	10.0.172.210 – 10.0.172.211	10.0.172.211
107	10.0.172.212/31	10.0.172.212 – 10.0.172.213	10.0.172.213
108	10.0.172.214/31	10.0.172.214 – 10.0.172.215	10.0.172.215
109	10.0.172.216/31	10.0.172.216 – 10.0.172.217	10.0.172.217
110	10.0.172.218/31	10.0.172.218 – 10.0.172.219	10.0.172.219
111	10.0.172.220/31	10.0.172.220 – 10.0.172.221	10.0.172.221
112	10.0.172.222/31	10.0.172.222 – 10.0.172.223	10.0.172.223
113	10.0.172.224/31	10.0.172.224 – 10.0.172.225	10.0.172.225
114	10.0.172.226/31	10.0.172.226 – 10.0.172.227	10.0.172.227
115	10.0.172.228/31	10.0.172.228 – 10.0.172.229	10.0.172.229
116	10.0.172.230/31	10.0.172.230 – 10.0.172.231	10.0.172.231
117	10.0.172.232/31	10.0.172.232 – 10.0.172.233	10.0.172.233
118	10.0.172.234/31	10.0.172.234 – 10.0.172.235	10.0.172.235
119	10.0.172.236/31	10.0.172.236 – 10.0.172.237	10.0.172.237
120	10.0.172.238/31	10.0.172.238 – 10.0.172.239	10.0.172.239
121	10.0.172.240/31	10.0.172.240 – 10.0.172.241	10.0.172.241
122	10.0.172.242/31	10.0.172.242 – 10.0.172.243	10.0.172.243
123	10.0.172.244/31	10.0.172.244 – 10.0.172.245	10.0.172.245
124	10.0.172.246/31	10.0.172.246 – 10.0.172.247	10.0.172.247
125	10.0.172.248/31	10.0.172.248 – 10.0.172.249	10.0.172.249
126	10.0.172.250/31	10.0.172.250 – 10.0.172.251	10.0.172.251
127	10.0.172.252/31	10.0.172.252 – 10.0.172.253	10.0.172.253
128	10.0.172.254/31	10.0.172.254 – 10.0.172.255	10.0.172.255
129	10.0.173.0/31	10.0.173.0 – 10.0.173.1	10.0.173.1
130	10.0.173.2/31	10.0.173.2 – 10.0.173.3	10.0.173.3
131	10.0.173.4/31	10.0.173.4 – 10.0.173.5	10.0.173.5
132	10.0.173.6/31	10.0.173.6 – 10.0.173.7	10.0.173.7
133	10.0.173.8/31	10.0.173.8 – 10.0.173.9	10.0.173.9
134	10.0.173.10/31	10.0.173.10 – 10.0.173.11	10.0.173.11
135	10.0.173.12/31	10.0.173.12 – 10.0.173.13	10.0.173.13
136	10.0.173.14/31	10.0.173.14 – 10.0.173.15	10.0.173.15
137	10.0.173.16/31	10.0.173.16 – 10.0.173.17	10.0.173.17
138	10.0.173.18/31	10.0.173.18 – 10.0.173.19	10.0.173.19
139	10.0.173.20/31	10.0.173.20 – 10.0.173.21	10.0.173.21
140	10.0.173.22/31	10.0.173.22 – 10.0.173.23	10.0.173.23
141	10.0.173.24/31	10.0.173.24 – 10.0.173.25	10.0.173.25
142	10.0.173.26/31	10.0.173.26 – 10.0.173.27	10.0.173.27
143	10.0.173.28/31	10.0.173.28 – 10.0.173.29	10.0.173.29
144	10.0.173.30/31	10.0.173.30 – 10.0.173.31	10.0.173.31
145	10.0.173.32/31	10.0.173.32 – 10.0.173.33	10.0.173.33
146	10.0.173.34/31	10.0.173.34 – 10.0.173.35	10.0.173.35
147	10.0.173.36/31	10.0.173.36 – 10.0.173.37	10.0.173.37
148	10.0.173.38/31	10.0.173.38 – 10.0.173.39	10.0.173.39
149	10.0.173.40/31	10.0.173.40 – 10.0.173.41	10.0.173.41
150	10.0.173.42/31	10.0.173.42 – 10.0.173.43	10.0.173.43
151	10.0.173.44/31	10.0.173.44 – 10.0.173.45	10.0.173.45
152	10.0.173.46/31	10.0.173.46 – 10.0.173.47	10.0.173.47
153	10.0.173.48/31	10.0.173.48 – 10.0.173.49	10.0.173.49
154	10.0.173.50/31	10.0.173.50 – 10.0.173.51	10.0.173.51
155	10.0.173.52/31	10.0.173.52 – 10.0.173.53	10.0.173.53
156	10.0.173.54/31	10.0.173.54 – 10.0.173.55	10.0.173.55
157	10.0.173.56/31	10.0.173.56 – 10.0.173.57	10.0.173.57
158	10.0.173.58/31	10.0.173.58 – 10.0.173.59	10.0.173.59
159	10.0.173.60/31	10.0.173.60 – 10.0.173.61	10.0.173.61
160	10.0.173.62/31	10.0.173.62 – 10.0.173.63	10.0.173.63
161	10.0.173.64/31	10.0.173.64 – 10.0.173.65	10.0.173.65
162	10.0.173.66/31	10.0.173.66 – 10.0.173.67	10.0.173.67
163	10.0.173.68/31	10.0.173.68 – 10.0.173.69	10.0.173.69
164	10.0.173.70/31	10.0.173.70 – 10.0.173.71	10.0.173.71
165	10.0.173.72/31	10.0.173.72 – 10.0.173.73	10.0.173.73
166	10.0.173.74/31	10.0.173.74 – 10.0.173.75	10.0.173.75
167	10.0.173.76/31	10.0.173.76 – 10.0.173.77	10.0.173.77
168	10.0.173.78/31	10.0.173.78 – 10.0.173.79	10.0.173.79
169	10.0.173.80/31	10.0.173.80 – 10.0.173.81	10.0.173.81
170	10.0.173.82/31	10.0.173.82 – 10.0.173.83	10.0.173.83
171	10.0.173.84/31	10.0.173.84 – 10.0.173.85	10.0.173.85
172	10.0.173.86/31	10.0.173.86 – 10.0.173.87	10.0.173.87
173	10.0.173.88/31	10.0.173.88 – 10.0.173.89	10.0.173.89
174	10.0.173.90/31	10.0.173.90 – 10.0.173.91	10.0.173.91
175	10.0.173.92/31	10.0.173.92 – 10.0.173.93	10.0.173.93
176	10.0.173.94/31	10.0.173.94 – 10.0.173.95	10.0.173.95
177	10.0.173.96/31	10.0.173.96 – 10.0.173.97	10.0.173.97
178	10.0.173.98/31	10.0.173.98 – 10.0.173.99	10.0.173.99
179	10.0.173.100/31	10.0.173.100 – 10.0.173.101	10.0.173.101
180	10.0.173.102/31	10.0.173.102 – 10.0.173.103	10.0.173.103
181	10.0.173.104/31	10.0.173.104 – 10.0.173.105	10.0.173.105
182	10.0.173.106/31	10.0.173.106 – 10.0.173.107	10.0.173.107
183	10.0.173.108/31	10.0.173.108 – 10.0.173.109	10.0.173.109
184	10.0.173.110/31	10.0.173.110 – 10.0.173.111	10.0.173.111
185	10.0.173.112/31	10.0.173.112 – 10.0.173.113	10.0.173.113
186	10.0.173.114/31	10.0.173.114 – 10.0.173.115	10.0.173.115
187	10.0.173.116/31	10.0.173.116 – 10.0.173.117	10.0.173.117
188	10.0.173.118/31	10.0.173.118 – 10.0.173.119	10.0.173.119
189	10.0.173.120/31	10.0.173.120 – 10.0.173.121	10.0.173.121
190	10.0.173.122/31	10.0.173.122 – 10.0.173.123	10.0.173.123
191	10.0.173.124/31	10.0.173.124 – 10.0.173.125	10.0.173.125
192	10.0.173.126/31	10.0.173.126 – 10.0.173.127	10.0.173.127
193	10.0.173.128/31	10.0.173.128 – 10.0.173.129	10.0.173.129
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195	10.0.173.132/31	10.0.173.132 – 10.0.173.133	10.0.173.133
196	10.0.173.134/31	10.0.173.134 – 10.0.173.135	10.0.173.135
197	10.0.173.136/31	10.0.173.136 – 10.0.173.137	10.0.173.137
198	10.0.173.138/31	10.0.173.138 – 10.0.173.139	10.0.173.139
199	10.0.173.140/31	10.0.173.140 – 10.0.173.141	10.0.173.141
200	10.0.173.142/31	10.0.173.142 – 10.0.173.143	10.0.173.143
201	10.0.173.144/31	10.0.173.144 – 10.0.173.145	10.0.173.145
202	10.0.173.146/31	10.0.173.146 – 10.0.173.147	10.0.173.147
203	10.0.173.148/31	10.0.173.148 – 10.0.173.149	10.0.173.149
204	10.0.173.150/31	10.0.173.150 – 10.0.173.151	10.0.173.151
205	10.0.173.152/31	10.0.173.152 – 10.0.173.153	10.0.173.153
206	10.0.173.154/31	10.0.173.154 – 10.0.173.155	10.0.173.155
207	10.0.173.156/31	10.0.173.156 – 10.0.173.157	10.0.173.157
208	10.0.173.158/31	10.0.173.158 – 10.0.173.159	10.0.173.159
209	10.0.173.160/31	10.0.173.160 – 10.0.173.161	10.0.173.161
210	10.0.173.162/31	10.0.173.162 – 10.0.173.163	10.0.173.163
211	10.0.173.164/31	10.0.173.164 – 10.0.173.165	10.0.173.165
212	10.0.173.166/31	10.0.173.166 – 10.0.173.167	10.0.173.167
213	10.0.173.168/31	10.0.173.168 – 10.0.173.169	10.0.173.169
214	10.0.173.170/31	10.0.173.170 – 10.0.173.171	10.0.173.171
215	10.0.173.172/31	10.0.173.172 – 10.0.173.173	10.0.173.173
216	10.0.173.174/31	10.0.173.174 – 10.0.173.175	10.0.173.175
217	10.0.173.176/31	10.0.173.176 – 10.0.173.177	10.0.173.177
218	10.0.173.178/31	10.0.173.178 – 10.0.173.179	10.0.173.179
219	10.0.173.180/31	10.0.173.180 – 10.0.173.181	10.0.173.181
220	10.0.173.182/31	10.0.173.182 – 10.0.173.183	10.0.173.183
221	10.0.173.184/31	10.0.173.184 – 10.0.173.185	10.0.173.185
222	10.0.173.186/31	10.0.173.186 – 10.0.173.187	10.0.173.187
223	10.0.173.188/31	10.0.173.188 – 10.0.173.189	10.0.173.189
224	10.0.173.190/31	10.0.173.190 – 10.0.173.191	10.0.173.191
225	10.0.173.192/31	10.0.173.192 – 10.0.173.193	10.0.173.193
226	10.0.173.194/31	10.0.173.194 – 10.0.173.195	10.0.173.195
227	10.0.173.196/31	10.0.173.196 – 10.0.173.197	10.0.173.197
228	10.0.173.198/31	10.0.173.198 – 10.0.173.199	10.0.173.199
229	10.0.173.200/31	10.0.173.200 – 10.0.173.201	10.0.173.201
230	10.0.173.202/31	10.0.173.202 – 10.0.173.203	10.0.173.203
231	10.0.173.204/31	10.0.173.204 – 10.0.173.205	10.0.173.205
232	10.0.173.206/31	10.0.173.206 – 10.0.173.207	10.0.173.207
233	10.0.173.208/31	10.0.173.208 – 10.0.173.209	10.0.173.209
234	10.0.173.210/31	10.0.173.210 – 10.0.173.211	10.0.173.211
235	10.0.173.212/31	10.0.173.212 – 10.0.173.213	10.0.173.213
236	10.0.173.214/31	10.0.173.214 – 10.0.173.215	10.0.173.215
237	10.0.173.216/31	10.0.173.216 – 10.0.173.217	10.0.173.217
238	10.0.173.218/31	10.0.173.218 – 10.0.173.219	10.0.173.219
239	10.0.173.220/31	10.0.173.220 – 10.0.173.221	10.0.173.221
240	10.0.173.222/31	10.0.173.222 – 10.0.173.223	10.0.173.223
241	10.0.173.224/31	10.0.173.224 – 10.0.173.225	10.0.173.225
242	10.0.173.226/31	10.0.173.226 – 10.0.173.227	10.0.173.227
243	10.0.173.228/31	10.0.173.228 – 10.0.173.229	10.0.173.229
244	10.0.173.230/31	10.0.173.230 – 10.0.173.231	10.0.173.231
245	10.0.173.232/31	10.0.173.232 – 10.0.173.233	10.0.173.233
246	10.0.173.234/31	10.0.173.234 – 10.0.173.235	10.0.173.235
247	10.0.173.236/31	10.0.173.236 – 10.0.173.237	10.0.173.237
248	10.0.173.238/31	10.0.173.238 – 10.0.173.239	10.0.173.239
249	10.0.173.240/31	10.0.173.240 – 10.0.173.241	10.0.173.241
250	10.0.173.242/31	10.0.173.242 – 10.0.173.243	10.0.173.243
251	10.0.173.244/31	10.0.173.244 – 10.0.173.245	10.0.173.245
252	10.0.173.246/31	10.0.173.246 – 10.0.173.247	10.0.173.247
253	10.0.173.248/31	10.0.173.248 – 10.0.173.249	10.0.173.249
254	10.0.173.250/31	10.0.173.250 – 10.0.173.251	10.0.173.251
255	10.0.173.252/31	10.0.173.252 – 10.0.173.253	10.0.173.253
256	10.0.173.254/31	10.0.173.254 – 10.0.173.255	10.0.173.255

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 →