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)10.87.72.0/22

network10.87.72.0/22

broadcast10.87.75.255

first host10.87.72.1

last host10.87.75.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.87.72.0/22

address00001010.01010111.01001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01010111.01001000.00000000

broadcast00001010.01010111.01001011.11111111

green = network part, grey = host part

hex0x0a574800

decimal173492224

reverse dns0.72.87.10.in-addr.arpa

ipv4-mapped::ffff:a57:4800

/22 split into /31 · 512 subnets

close ×

#	network	host range	broadcast
1	10.87.72.0/31	10.87.72.0 – 10.87.72.1	10.87.72.1
2	10.87.72.2/31	10.87.72.2 – 10.87.72.3	10.87.72.3
3	10.87.72.4/31	10.87.72.4 – 10.87.72.5	10.87.72.5
4	10.87.72.6/31	10.87.72.6 – 10.87.72.7	10.87.72.7
5	10.87.72.8/31	10.87.72.8 – 10.87.72.9	10.87.72.9
6	10.87.72.10/31	10.87.72.10 – 10.87.72.11	10.87.72.11
7	10.87.72.12/31	10.87.72.12 – 10.87.72.13	10.87.72.13
8	10.87.72.14/31	10.87.72.14 – 10.87.72.15	10.87.72.15
9	10.87.72.16/31	10.87.72.16 – 10.87.72.17	10.87.72.17
10	10.87.72.18/31	10.87.72.18 – 10.87.72.19	10.87.72.19
11	10.87.72.20/31	10.87.72.20 – 10.87.72.21	10.87.72.21
12	10.87.72.22/31	10.87.72.22 – 10.87.72.23	10.87.72.23
13	10.87.72.24/31	10.87.72.24 – 10.87.72.25	10.87.72.25
14	10.87.72.26/31	10.87.72.26 – 10.87.72.27	10.87.72.27
15	10.87.72.28/31	10.87.72.28 – 10.87.72.29	10.87.72.29
16	10.87.72.30/31	10.87.72.30 – 10.87.72.31	10.87.72.31
17	10.87.72.32/31	10.87.72.32 – 10.87.72.33	10.87.72.33
18	10.87.72.34/31	10.87.72.34 – 10.87.72.35	10.87.72.35
19	10.87.72.36/31	10.87.72.36 – 10.87.72.37	10.87.72.37
20	10.87.72.38/31	10.87.72.38 – 10.87.72.39	10.87.72.39
21	10.87.72.40/31	10.87.72.40 – 10.87.72.41	10.87.72.41
22	10.87.72.42/31	10.87.72.42 – 10.87.72.43	10.87.72.43
23	10.87.72.44/31	10.87.72.44 – 10.87.72.45	10.87.72.45
24	10.87.72.46/31	10.87.72.46 – 10.87.72.47	10.87.72.47
25	10.87.72.48/31	10.87.72.48 – 10.87.72.49	10.87.72.49
26	10.87.72.50/31	10.87.72.50 – 10.87.72.51	10.87.72.51
27	10.87.72.52/31	10.87.72.52 – 10.87.72.53	10.87.72.53
28	10.87.72.54/31	10.87.72.54 – 10.87.72.55	10.87.72.55
29	10.87.72.56/31	10.87.72.56 – 10.87.72.57	10.87.72.57
30	10.87.72.58/31	10.87.72.58 – 10.87.72.59	10.87.72.59
31	10.87.72.60/31	10.87.72.60 – 10.87.72.61	10.87.72.61
32	10.87.72.62/31	10.87.72.62 – 10.87.72.63	10.87.72.63
33	10.87.72.64/31	10.87.72.64 – 10.87.72.65	10.87.72.65
34	10.87.72.66/31	10.87.72.66 – 10.87.72.67	10.87.72.67
35	10.87.72.68/31	10.87.72.68 – 10.87.72.69	10.87.72.69
36	10.87.72.70/31	10.87.72.70 – 10.87.72.71	10.87.72.71
37	10.87.72.72/31	10.87.72.72 – 10.87.72.73	10.87.72.73
38	10.87.72.74/31	10.87.72.74 – 10.87.72.75	10.87.72.75
39	10.87.72.76/31	10.87.72.76 – 10.87.72.77	10.87.72.77
40	10.87.72.78/31	10.87.72.78 – 10.87.72.79	10.87.72.79
41	10.87.72.80/31	10.87.72.80 – 10.87.72.81	10.87.72.81
42	10.87.72.82/31	10.87.72.82 – 10.87.72.83	10.87.72.83
43	10.87.72.84/31	10.87.72.84 – 10.87.72.85	10.87.72.85
44	10.87.72.86/31	10.87.72.86 – 10.87.72.87	10.87.72.87
45	10.87.72.88/31	10.87.72.88 – 10.87.72.89	10.87.72.89
46	10.87.72.90/31	10.87.72.90 – 10.87.72.91	10.87.72.91
47	10.87.72.92/31	10.87.72.92 – 10.87.72.93	10.87.72.93
48	10.87.72.94/31	10.87.72.94 – 10.87.72.95	10.87.72.95
49	10.87.72.96/31	10.87.72.96 – 10.87.72.97	10.87.72.97
50	10.87.72.98/31	10.87.72.98 – 10.87.72.99	10.87.72.99
51	10.87.72.100/31	10.87.72.100 – 10.87.72.101	10.87.72.101
52	10.87.72.102/31	10.87.72.102 – 10.87.72.103	10.87.72.103
53	10.87.72.104/31	10.87.72.104 – 10.87.72.105	10.87.72.105
54	10.87.72.106/31	10.87.72.106 – 10.87.72.107	10.87.72.107
55	10.87.72.108/31	10.87.72.108 – 10.87.72.109	10.87.72.109
56	10.87.72.110/31	10.87.72.110 – 10.87.72.111	10.87.72.111
57	10.87.72.112/31	10.87.72.112 – 10.87.72.113	10.87.72.113
58	10.87.72.114/31	10.87.72.114 – 10.87.72.115	10.87.72.115
59	10.87.72.116/31	10.87.72.116 – 10.87.72.117	10.87.72.117
60	10.87.72.118/31	10.87.72.118 – 10.87.72.119	10.87.72.119
61	10.87.72.120/31	10.87.72.120 – 10.87.72.121	10.87.72.121
62	10.87.72.122/31	10.87.72.122 – 10.87.72.123	10.87.72.123
63	10.87.72.124/31	10.87.72.124 – 10.87.72.125	10.87.72.125
64	10.87.72.126/31	10.87.72.126 – 10.87.72.127	10.87.72.127
65	10.87.72.128/31	10.87.72.128 – 10.87.72.129	10.87.72.129
66	10.87.72.130/31	10.87.72.130 – 10.87.72.131	10.87.72.131
67	10.87.72.132/31	10.87.72.132 – 10.87.72.133	10.87.72.133
68	10.87.72.134/31	10.87.72.134 – 10.87.72.135	10.87.72.135
69	10.87.72.136/31	10.87.72.136 – 10.87.72.137	10.87.72.137
70	10.87.72.138/31	10.87.72.138 – 10.87.72.139	10.87.72.139
71	10.87.72.140/31	10.87.72.140 – 10.87.72.141	10.87.72.141
72	10.87.72.142/31	10.87.72.142 – 10.87.72.143	10.87.72.143
73	10.87.72.144/31	10.87.72.144 – 10.87.72.145	10.87.72.145
74	10.87.72.146/31	10.87.72.146 – 10.87.72.147	10.87.72.147
75	10.87.72.148/31	10.87.72.148 – 10.87.72.149	10.87.72.149
76	10.87.72.150/31	10.87.72.150 – 10.87.72.151	10.87.72.151
77	10.87.72.152/31	10.87.72.152 – 10.87.72.153	10.87.72.153
78	10.87.72.154/31	10.87.72.154 – 10.87.72.155	10.87.72.155
79	10.87.72.156/31	10.87.72.156 – 10.87.72.157	10.87.72.157
80	10.87.72.158/31	10.87.72.158 – 10.87.72.159	10.87.72.159
81	10.87.72.160/31	10.87.72.160 – 10.87.72.161	10.87.72.161
82	10.87.72.162/31	10.87.72.162 – 10.87.72.163	10.87.72.163
83	10.87.72.164/31	10.87.72.164 – 10.87.72.165	10.87.72.165
84	10.87.72.166/31	10.87.72.166 – 10.87.72.167	10.87.72.167
85	10.87.72.168/31	10.87.72.168 – 10.87.72.169	10.87.72.169
86	10.87.72.170/31	10.87.72.170 – 10.87.72.171	10.87.72.171
87	10.87.72.172/31	10.87.72.172 – 10.87.72.173	10.87.72.173
88	10.87.72.174/31	10.87.72.174 – 10.87.72.175	10.87.72.175
89	10.87.72.176/31	10.87.72.176 – 10.87.72.177	10.87.72.177
90	10.87.72.178/31	10.87.72.178 – 10.87.72.179	10.87.72.179
91	10.87.72.180/31	10.87.72.180 – 10.87.72.181	10.87.72.181
92	10.87.72.182/31	10.87.72.182 – 10.87.72.183	10.87.72.183
93	10.87.72.184/31	10.87.72.184 – 10.87.72.185	10.87.72.185
94	10.87.72.186/31	10.87.72.186 – 10.87.72.187	10.87.72.187
95	10.87.72.188/31	10.87.72.188 – 10.87.72.189	10.87.72.189
96	10.87.72.190/31	10.87.72.190 – 10.87.72.191	10.87.72.191
97	10.87.72.192/31	10.87.72.192 – 10.87.72.193	10.87.72.193
98	10.87.72.194/31	10.87.72.194 – 10.87.72.195	10.87.72.195
99	10.87.72.196/31	10.87.72.196 – 10.87.72.197	10.87.72.197
100	10.87.72.198/31	10.87.72.198 – 10.87.72.199	10.87.72.199
101	10.87.72.200/31	10.87.72.200 – 10.87.72.201	10.87.72.201
102	10.87.72.202/31	10.87.72.202 – 10.87.72.203	10.87.72.203
103	10.87.72.204/31	10.87.72.204 – 10.87.72.205	10.87.72.205
104	10.87.72.206/31	10.87.72.206 – 10.87.72.207	10.87.72.207
105	10.87.72.208/31	10.87.72.208 – 10.87.72.209	10.87.72.209
106	10.87.72.210/31	10.87.72.210 – 10.87.72.211	10.87.72.211
107	10.87.72.212/31	10.87.72.212 – 10.87.72.213	10.87.72.213
108	10.87.72.214/31	10.87.72.214 – 10.87.72.215	10.87.72.215
109	10.87.72.216/31	10.87.72.216 – 10.87.72.217	10.87.72.217
110	10.87.72.218/31	10.87.72.218 – 10.87.72.219	10.87.72.219
111	10.87.72.220/31	10.87.72.220 – 10.87.72.221	10.87.72.221
112	10.87.72.222/31	10.87.72.222 – 10.87.72.223	10.87.72.223
113	10.87.72.224/31	10.87.72.224 – 10.87.72.225	10.87.72.225
114	10.87.72.226/31	10.87.72.226 – 10.87.72.227	10.87.72.227
115	10.87.72.228/31	10.87.72.228 – 10.87.72.229	10.87.72.229
116	10.87.72.230/31	10.87.72.230 – 10.87.72.231	10.87.72.231
117	10.87.72.232/31	10.87.72.232 – 10.87.72.233	10.87.72.233
118	10.87.72.234/31	10.87.72.234 – 10.87.72.235	10.87.72.235
119	10.87.72.236/31	10.87.72.236 – 10.87.72.237	10.87.72.237
120	10.87.72.238/31	10.87.72.238 – 10.87.72.239	10.87.72.239
121	10.87.72.240/31	10.87.72.240 – 10.87.72.241	10.87.72.241
122	10.87.72.242/31	10.87.72.242 – 10.87.72.243	10.87.72.243
123	10.87.72.244/31	10.87.72.244 – 10.87.72.245	10.87.72.245
124	10.87.72.246/31	10.87.72.246 – 10.87.72.247	10.87.72.247
125	10.87.72.248/31	10.87.72.248 – 10.87.72.249	10.87.72.249
126	10.87.72.250/31	10.87.72.250 – 10.87.72.251	10.87.72.251
127	10.87.72.252/31	10.87.72.252 – 10.87.72.253	10.87.72.253
128	10.87.72.254/31	10.87.72.254 – 10.87.72.255	10.87.72.255
129	10.87.73.0/31	10.87.73.0 – 10.87.73.1	10.87.73.1
130	10.87.73.2/31	10.87.73.2 – 10.87.73.3	10.87.73.3
131	10.87.73.4/31	10.87.73.4 – 10.87.73.5	10.87.73.5
132	10.87.73.6/31	10.87.73.6 – 10.87.73.7	10.87.73.7
133	10.87.73.8/31	10.87.73.8 – 10.87.73.9	10.87.73.9
134	10.87.73.10/31	10.87.73.10 – 10.87.73.11	10.87.73.11
135	10.87.73.12/31	10.87.73.12 – 10.87.73.13	10.87.73.13
136	10.87.73.14/31	10.87.73.14 – 10.87.73.15	10.87.73.15
137	10.87.73.16/31	10.87.73.16 – 10.87.73.17	10.87.73.17
138	10.87.73.18/31	10.87.73.18 – 10.87.73.19	10.87.73.19
139	10.87.73.20/31	10.87.73.20 – 10.87.73.21	10.87.73.21
140	10.87.73.22/31	10.87.73.22 – 10.87.73.23	10.87.73.23
141	10.87.73.24/31	10.87.73.24 – 10.87.73.25	10.87.73.25
142	10.87.73.26/31	10.87.73.26 – 10.87.73.27	10.87.73.27
143	10.87.73.28/31	10.87.73.28 – 10.87.73.29	10.87.73.29
144	10.87.73.30/31	10.87.73.30 – 10.87.73.31	10.87.73.31
145	10.87.73.32/31	10.87.73.32 – 10.87.73.33	10.87.73.33
146	10.87.73.34/31	10.87.73.34 – 10.87.73.35	10.87.73.35
147	10.87.73.36/31	10.87.73.36 – 10.87.73.37	10.87.73.37
148	10.87.73.38/31	10.87.73.38 – 10.87.73.39	10.87.73.39
149	10.87.73.40/31	10.87.73.40 – 10.87.73.41	10.87.73.41
150	10.87.73.42/31	10.87.73.42 – 10.87.73.43	10.87.73.43
151	10.87.73.44/31	10.87.73.44 – 10.87.73.45	10.87.73.45
152	10.87.73.46/31	10.87.73.46 – 10.87.73.47	10.87.73.47
153	10.87.73.48/31	10.87.73.48 – 10.87.73.49	10.87.73.49
154	10.87.73.50/31	10.87.73.50 – 10.87.73.51	10.87.73.51
155	10.87.73.52/31	10.87.73.52 – 10.87.73.53	10.87.73.53
156	10.87.73.54/31	10.87.73.54 – 10.87.73.55	10.87.73.55
157	10.87.73.56/31	10.87.73.56 – 10.87.73.57	10.87.73.57
158	10.87.73.58/31	10.87.73.58 – 10.87.73.59	10.87.73.59
159	10.87.73.60/31	10.87.73.60 – 10.87.73.61	10.87.73.61
160	10.87.73.62/31	10.87.73.62 – 10.87.73.63	10.87.73.63
161	10.87.73.64/31	10.87.73.64 – 10.87.73.65	10.87.73.65
162	10.87.73.66/31	10.87.73.66 – 10.87.73.67	10.87.73.67
163	10.87.73.68/31	10.87.73.68 – 10.87.73.69	10.87.73.69
164	10.87.73.70/31	10.87.73.70 – 10.87.73.71	10.87.73.71
165	10.87.73.72/31	10.87.73.72 – 10.87.73.73	10.87.73.73
166	10.87.73.74/31	10.87.73.74 – 10.87.73.75	10.87.73.75
167	10.87.73.76/31	10.87.73.76 – 10.87.73.77	10.87.73.77
168	10.87.73.78/31	10.87.73.78 – 10.87.73.79	10.87.73.79
169	10.87.73.80/31	10.87.73.80 – 10.87.73.81	10.87.73.81
170	10.87.73.82/31	10.87.73.82 – 10.87.73.83	10.87.73.83
171	10.87.73.84/31	10.87.73.84 – 10.87.73.85	10.87.73.85
172	10.87.73.86/31	10.87.73.86 – 10.87.73.87	10.87.73.87
173	10.87.73.88/31	10.87.73.88 – 10.87.73.89	10.87.73.89
174	10.87.73.90/31	10.87.73.90 – 10.87.73.91	10.87.73.91
175	10.87.73.92/31	10.87.73.92 – 10.87.73.93	10.87.73.93
176	10.87.73.94/31	10.87.73.94 – 10.87.73.95	10.87.73.95
177	10.87.73.96/31	10.87.73.96 – 10.87.73.97	10.87.73.97
178	10.87.73.98/31	10.87.73.98 – 10.87.73.99	10.87.73.99
179	10.87.73.100/31	10.87.73.100 – 10.87.73.101	10.87.73.101
180	10.87.73.102/31	10.87.73.102 – 10.87.73.103	10.87.73.103
181	10.87.73.104/31	10.87.73.104 – 10.87.73.105	10.87.73.105
182	10.87.73.106/31	10.87.73.106 – 10.87.73.107	10.87.73.107
183	10.87.73.108/31	10.87.73.108 – 10.87.73.109	10.87.73.109
184	10.87.73.110/31	10.87.73.110 – 10.87.73.111	10.87.73.111
185	10.87.73.112/31	10.87.73.112 – 10.87.73.113	10.87.73.113
186	10.87.73.114/31	10.87.73.114 – 10.87.73.115	10.87.73.115
187	10.87.73.116/31	10.87.73.116 – 10.87.73.117	10.87.73.117
188	10.87.73.118/31	10.87.73.118 – 10.87.73.119	10.87.73.119
189	10.87.73.120/31	10.87.73.120 – 10.87.73.121	10.87.73.121
190	10.87.73.122/31	10.87.73.122 – 10.87.73.123	10.87.73.123
191	10.87.73.124/31	10.87.73.124 – 10.87.73.125	10.87.73.125
192	10.87.73.126/31	10.87.73.126 – 10.87.73.127	10.87.73.127
193	10.87.73.128/31	10.87.73.128 – 10.87.73.129	10.87.73.129
194	10.87.73.130/31	10.87.73.130 – 10.87.73.131	10.87.73.131
195	10.87.73.132/31	10.87.73.132 – 10.87.73.133	10.87.73.133
196	10.87.73.134/31	10.87.73.134 – 10.87.73.135	10.87.73.135
197	10.87.73.136/31	10.87.73.136 – 10.87.73.137	10.87.73.137
198	10.87.73.138/31	10.87.73.138 – 10.87.73.139	10.87.73.139
199	10.87.73.140/31	10.87.73.140 – 10.87.73.141	10.87.73.141
200	10.87.73.142/31	10.87.73.142 – 10.87.73.143	10.87.73.143
201	10.87.73.144/31	10.87.73.144 – 10.87.73.145	10.87.73.145
202	10.87.73.146/31	10.87.73.146 – 10.87.73.147	10.87.73.147
203	10.87.73.148/31	10.87.73.148 – 10.87.73.149	10.87.73.149
204	10.87.73.150/31	10.87.73.150 – 10.87.73.151	10.87.73.151
205	10.87.73.152/31	10.87.73.152 – 10.87.73.153	10.87.73.153
206	10.87.73.154/31	10.87.73.154 – 10.87.73.155	10.87.73.155
207	10.87.73.156/31	10.87.73.156 – 10.87.73.157	10.87.73.157
208	10.87.73.158/31	10.87.73.158 – 10.87.73.159	10.87.73.159
209	10.87.73.160/31	10.87.73.160 – 10.87.73.161	10.87.73.161
210	10.87.73.162/31	10.87.73.162 – 10.87.73.163	10.87.73.163
211	10.87.73.164/31	10.87.73.164 – 10.87.73.165	10.87.73.165
212	10.87.73.166/31	10.87.73.166 – 10.87.73.167	10.87.73.167
213	10.87.73.168/31	10.87.73.168 – 10.87.73.169	10.87.73.169
214	10.87.73.170/31	10.87.73.170 – 10.87.73.171	10.87.73.171
215	10.87.73.172/31	10.87.73.172 – 10.87.73.173	10.87.73.173
216	10.87.73.174/31	10.87.73.174 – 10.87.73.175	10.87.73.175
217	10.87.73.176/31	10.87.73.176 – 10.87.73.177	10.87.73.177
218	10.87.73.178/31	10.87.73.178 – 10.87.73.179	10.87.73.179
219	10.87.73.180/31	10.87.73.180 – 10.87.73.181	10.87.73.181
220	10.87.73.182/31	10.87.73.182 – 10.87.73.183	10.87.73.183
221	10.87.73.184/31	10.87.73.184 – 10.87.73.185	10.87.73.185
222	10.87.73.186/31	10.87.73.186 – 10.87.73.187	10.87.73.187
223	10.87.73.188/31	10.87.73.188 – 10.87.73.189	10.87.73.189
224	10.87.73.190/31	10.87.73.190 – 10.87.73.191	10.87.73.191
225	10.87.73.192/31	10.87.73.192 – 10.87.73.193	10.87.73.193
226	10.87.73.194/31	10.87.73.194 – 10.87.73.195	10.87.73.195
227	10.87.73.196/31	10.87.73.196 – 10.87.73.197	10.87.73.197
228	10.87.73.198/31	10.87.73.198 – 10.87.73.199	10.87.73.199
229	10.87.73.200/31	10.87.73.200 – 10.87.73.201	10.87.73.201
230	10.87.73.202/31	10.87.73.202 – 10.87.73.203	10.87.73.203
231	10.87.73.204/31	10.87.73.204 – 10.87.73.205	10.87.73.205
232	10.87.73.206/31	10.87.73.206 – 10.87.73.207	10.87.73.207
233	10.87.73.208/31	10.87.73.208 – 10.87.73.209	10.87.73.209
234	10.87.73.210/31	10.87.73.210 – 10.87.73.211	10.87.73.211
235	10.87.73.212/31	10.87.73.212 – 10.87.73.213	10.87.73.213
236	10.87.73.214/31	10.87.73.214 – 10.87.73.215	10.87.73.215
237	10.87.73.216/31	10.87.73.216 – 10.87.73.217	10.87.73.217
238	10.87.73.218/31	10.87.73.218 – 10.87.73.219	10.87.73.219
239	10.87.73.220/31	10.87.73.220 – 10.87.73.221	10.87.73.221
240	10.87.73.222/31	10.87.73.222 – 10.87.73.223	10.87.73.223
241	10.87.73.224/31	10.87.73.224 – 10.87.73.225	10.87.73.225
242	10.87.73.226/31	10.87.73.226 – 10.87.73.227	10.87.73.227
243	10.87.73.228/31	10.87.73.228 – 10.87.73.229	10.87.73.229
244	10.87.73.230/31	10.87.73.230 – 10.87.73.231	10.87.73.231
245	10.87.73.232/31	10.87.73.232 – 10.87.73.233	10.87.73.233
246	10.87.73.234/31	10.87.73.234 – 10.87.73.235	10.87.73.235
247	10.87.73.236/31	10.87.73.236 – 10.87.73.237	10.87.73.237
248	10.87.73.238/31	10.87.73.238 – 10.87.73.239	10.87.73.239
249	10.87.73.240/31	10.87.73.240 – 10.87.73.241	10.87.73.241
250	10.87.73.242/31	10.87.73.242 – 10.87.73.243	10.87.73.243
251	10.87.73.244/31	10.87.73.244 – 10.87.73.245	10.87.73.245
252	10.87.73.246/31	10.87.73.246 – 10.87.73.247	10.87.73.247
253	10.87.73.248/31	10.87.73.248 – 10.87.73.249	10.87.73.249
254	10.87.73.250/31	10.87.73.250 – 10.87.73.251	10.87.73.251
255	10.87.73.252/31	10.87.73.252 – 10.87.73.253	10.87.73.253
256	10.87.73.254/31	10.87.73.254 – 10.87.73.255	10.87.73.255

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 →