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)10.81.76.0/22

network10.81.76.0/22

broadcast10.81.79.255

first host10.81.76.1

last host10.81.79.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.81.76.0/22

address00001010.01010001.01001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01010001.01001100.00000000

broadcast00001010.01010001.01001111.11111111

green = network part, grey = host part

hex0x0a514c00

decimal173100032

reverse dns0.76.81.10.in-addr.arpa

ipv4-mapped::ffff:a51:4c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.81.76.0/30	10.81.76.1 – 10.81.76.2	10.81.76.3
2	10.81.76.4/30	10.81.76.5 – 10.81.76.6	10.81.76.7
3	10.81.76.8/30	10.81.76.9 – 10.81.76.10	10.81.76.11
4	10.81.76.12/30	10.81.76.13 – 10.81.76.14	10.81.76.15
5	10.81.76.16/30	10.81.76.17 – 10.81.76.18	10.81.76.19
6	10.81.76.20/30	10.81.76.21 – 10.81.76.22	10.81.76.23
7	10.81.76.24/30	10.81.76.25 – 10.81.76.26	10.81.76.27
8	10.81.76.28/30	10.81.76.29 – 10.81.76.30	10.81.76.31
9	10.81.76.32/30	10.81.76.33 – 10.81.76.34	10.81.76.35
10	10.81.76.36/30	10.81.76.37 – 10.81.76.38	10.81.76.39
11	10.81.76.40/30	10.81.76.41 – 10.81.76.42	10.81.76.43
12	10.81.76.44/30	10.81.76.45 – 10.81.76.46	10.81.76.47
13	10.81.76.48/30	10.81.76.49 – 10.81.76.50	10.81.76.51
14	10.81.76.52/30	10.81.76.53 – 10.81.76.54	10.81.76.55
15	10.81.76.56/30	10.81.76.57 – 10.81.76.58	10.81.76.59
16	10.81.76.60/30	10.81.76.61 – 10.81.76.62	10.81.76.63
17	10.81.76.64/30	10.81.76.65 – 10.81.76.66	10.81.76.67
18	10.81.76.68/30	10.81.76.69 – 10.81.76.70	10.81.76.71
19	10.81.76.72/30	10.81.76.73 – 10.81.76.74	10.81.76.75
20	10.81.76.76/30	10.81.76.77 – 10.81.76.78	10.81.76.79
21	10.81.76.80/30	10.81.76.81 – 10.81.76.82	10.81.76.83
22	10.81.76.84/30	10.81.76.85 – 10.81.76.86	10.81.76.87
23	10.81.76.88/30	10.81.76.89 – 10.81.76.90	10.81.76.91
24	10.81.76.92/30	10.81.76.93 – 10.81.76.94	10.81.76.95
25	10.81.76.96/30	10.81.76.97 – 10.81.76.98	10.81.76.99
26	10.81.76.100/30	10.81.76.101 – 10.81.76.102	10.81.76.103
27	10.81.76.104/30	10.81.76.105 – 10.81.76.106	10.81.76.107
28	10.81.76.108/30	10.81.76.109 – 10.81.76.110	10.81.76.111
29	10.81.76.112/30	10.81.76.113 – 10.81.76.114	10.81.76.115
30	10.81.76.116/30	10.81.76.117 – 10.81.76.118	10.81.76.119
31	10.81.76.120/30	10.81.76.121 – 10.81.76.122	10.81.76.123
32	10.81.76.124/30	10.81.76.125 – 10.81.76.126	10.81.76.127
33	10.81.76.128/30	10.81.76.129 – 10.81.76.130	10.81.76.131
34	10.81.76.132/30	10.81.76.133 – 10.81.76.134	10.81.76.135
35	10.81.76.136/30	10.81.76.137 – 10.81.76.138	10.81.76.139
36	10.81.76.140/30	10.81.76.141 – 10.81.76.142	10.81.76.143
37	10.81.76.144/30	10.81.76.145 – 10.81.76.146	10.81.76.147
38	10.81.76.148/30	10.81.76.149 – 10.81.76.150	10.81.76.151
39	10.81.76.152/30	10.81.76.153 – 10.81.76.154	10.81.76.155
40	10.81.76.156/30	10.81.76.157 – 10.81.76.158	10.81.76.159
41	10.81.76.160/30	10.81.76.161 – 10.81.76.162	10.81.76.163
42	10.81.76.164/30	10.81.76.165 – 10.81.76.166	10.81.76.167
43	10.81.76.168/30	10.81.76.169 – 10.81.76.170	10.81.76.171
44	10.81.76.172/30	10.81.76.173 – 10.81.76.174	10.81.76.175
45	10.81.76.176/30	10.81.76.177 – 10.81.76.178	10.81.76.179
46	10.81.76.180/30	10.81.76.181 – 10.81.76.182	10.81.76.183
47	10.81.76.184/30	10.81.76.185 – 10.81.76.186	10.81.76.187
48	10.81.76.188/30	10.81.76.189 – 10.81.76.190	10.81.76.191
49	10.81.76.192/30	10.81.76.193 – 10.81.76.194	10.81.76.195
50	10.81.76.196/30	10.81.76.197 – 10.81.76.198	10.81.76.199
51	10.81.76.200/30	10.81.76.201 – 10.81.76.202	10.81.76.203
52	10.81.76.204/30	10.81.76.205 – 10.81.76.206	10.81.76.207
53	10.81.76.208/30	10.81.76.209 – 10.81.76.210	10.81.76.211
54	10.81.76.212/30	10.81.76.213 – 10.81.76.214	10.81.76.215
55	10.81.76.216/30	10.81.76.217 – 10.81.76.218	10.81.76.219
56	10.81.76.220/30	10.81.76.221 – 10.81.76.222	10.81.76.223
57	10.81.76.224/30	10.81.76.225 – 10.81.76.226	10.81.76.227
58	10.81.76.228/30	10.81.76.229 – 10.81.76.230	10.81.76.231
59	10.81.76.232/30	10.81.76.233 – 10.81.76.234	10.81.76.235
60	10.81.76.236/30	10.81.76.237 – 10.81.76.238	10.81.76.239
61	10.81.76.240/30	10.81.76.241 – 10.81.76.242	10.81.76.243
62	10.81.76.244/30	10.81.76.245 – 10.81.76.246	10.81.76.247
63	10.81.76.248/30	10.81.76.249 – 10.81.76.250	10.81.76.251
64	10.81.76.252/30	10.81.76.253 – 10.81.76.254	10.81.76.255
65	10.81.77.0/30	10.81.77.1 – 10.81.77.2	10.81.77.3
66	10.81.77.4/30	10.81.77.5 – 10.81.77.6	10.81.77.7
67	10.81.77.8/30	10.81.77.9 – 10.81.77.10	10.81.77.11
68	10.81.77.12/30	10.81.77.13 – 10.81.77.14	10.81.77.15
69	10.81.77.16/30	10.81.77.17 – 10.81.77.18	10.81.77.19
70	10.81.77.20/30	10.81.77.21 – 10.81.77.22	10.81.77.23
71	10.81.77.24/30	10.81.77.25 – 10.81.77.26	10.81.77.27
72	10.81.77.28/30	10.81.77.29 – 10.81.77.30	10.81.77.31
73	10.81.77.32/30	10.81.77.33 – 10.81.77.34	10.81.77.35
74	10.81.77.36/30	10.81.77.37 – 10.81.77.38	10.81.77.39
75	10.81.77.40/30	10.81.77.41 – 10.81.77.42	10.81.77.43
76	10.81.77.44/30	10.81.77.45 – 10.81.77.46	10.81.77.47
77	10.81.77.48/30	10.81.77.49 – 10.81.77.50	10.81.77.51
78	10.81.77.52/30	10.81.77.53 – 10.81.77.54	10.81.77.55
79	10.81.77.56/30	10.81.77.57 – 10.81.77.58	10.81.77.59
80	10.81.77.60/30	10.81.77.61 – 10.81.77.62	10.81.77.63
81	10.81.77.64/30	10.81.77.65 – 10.81.77.66	10.81.77.67
82	10.81.77.68/30	10.81.77.69 – 10.81.77.70	10.81.77.71
83	10.81.77.72/30	10.81.77.73 – 10.81.77.74	10.81.77.75
84	10.81.77.76/30	10.81.77.77 – 10.81.77.78	10.81.77.79
85	10.81.77.80/30	10.81.77.81 – 10.81.77.82	10.81.77.83
86	10.81.77.84/30	10.81.77.85 – 10.81.77.86	10.81.77.87
87	10.81.77.88/30	10.81.77.89 – 10.81.77.90	10.81.77.91
88	10.81.77.92/30	10.81.77.93 – 10.81.77.94	10.81.77.95
89	10.81.77.96/30	10.81.77.97 – 10.81.77.98	10.81.77.99
90	10.81.77.100/30	10.81.77.101 – 10.81.77.102	10.81.77.103
91	10.81.77.104/30	10.81.77.105 – 10.81.77.106	10.81.77.107
92	10.81.77.108/30	10.81.77.109 – 10.81.77.110	10.81.77.111
93	10.81.77.112/30	10.81.77.113 – 10.81.77.114	10.81.77.115
94	10.81.77.116/30	10.81.77.117 – 10.81.77.118	10.81.77.119
95	10.81.77.120/30	10.81.77.121 – 10.81.77.122	10.81.77.123
96	10.81.77.124/30	10.81.77.125 – 10.81.77.126	10.81.77.127
97	10.81.77.128/30	10.81.77.129 – 10.81.77.130	10.81.77.131
98	10.81.77.132/30	10.81.77.133 – 10.81.77.134	10.81.77.135
99	10.81.77.136/30	10.81.77.137 – 10.81.77.138	10.81.77.139
100	10.81.77.140/30	10.81.77.141 – 10.81.77.142	10.81.77.143
101	10.81.77.144/30	10.81.77.145 – 10.81.77.146	10.81.77.147
102	10.81.77.148/30	10.81.77.149 – 10.81.77.150	10.81.77.151
103	10.81.77.152/30	10.81.77.153 – 10.81.77.154	10.81.77.155
104	10.81.77.156/30	10.81.77.157 – 10.81.77.158	10.81.77.159
105	10.81.77.160/30	10.81.77.161 – 10.81.77.162	10.81.77.163
106	10.81.77.164/30	10.81.77.165 – 10.81.77.166	10.81.77.167
107	10.81.77.168/30	10.81.77.169 – 10.81.77.170	10.81.77.171
108	10.81.77.172/30	10.81.77.173 – 10.81.77.174	10.81.77.175
109	10.81.77.176/30	10.81.77.177 – 10.81.77.178	10.81.77.179
110	10.81.77.180/30	10.81.77.181 – 10.81.77.182	10.81.77.183
111	10.81.77.184/30	10.81.77.185 – 10.81.77.186	10.81.77.187
112	10.81.77.188/30	10.81.77.189 – 10.81.77.190	10.81.77.191
113	10.81.77.192/30	10.81.77.193 – 10.81.77.194	10.81.77.195
114	10.81.77.196/30	10.81.77.197 – 10.81.77.198	10.81.77.199
115	10.81.77.200/30	10.81.77.201 – 10.81.77.202	10.81.77.203
116	10.81.77.204/30	10.81.77.205 – 10.81.77.206	10.81.77.207
117	10.81.77.208/30	10.81.77.209 – 10.81.77.210	10.81.77.211
118	10.81.77.212/30	10.81.77.213 – 10.81.77.214	10.81.77.215
119	10.81.77.216/30	10.81.77.217 – 10.81.77.218	10.81.77.219
120	10.81.77.220/30	10.81.77.221 – 10.81.77.222	10.81.77.223
121	10.81.77.224/30	10.81.77.225 – 10.81.77.226	10.81.77.227
122	10.81.77.228/30	10.81.77.229 – 10.81.77.230	10.81.77.231
123	10.81.77.232/30	10.81.77.233 – 10.81.77.234	10.81.77.235
124	10.81.77.236/30	10.81.77.237 – 10.81.77.238	10.81.77.239
125	10.81.77.240/30	10.81.77.241 – 10.81.77.242	10.81.77.243
126	10.81.77.244/30	10.81.77.245 – 10.81.77.246	10.81.77.247
127	10.81.77.248/30	10.81.77.249 – 10.81.77.250	10.81.77.251
128	10.81.77.252/30	10.81.77.253 – 10.81.77.254	10.81.77.255
129	10.81.78.0/30	10.81.78.1 – 10.81.78.2	10.81.78.3
130	10.81.78.4/30	10.81.78.5 – 10.81.78.6	10.81.78.7
131	10.81.78.8/30	10.81.78.9 – 10.81.78.10	10.81.78.11
132	10.81.78.12/30	10.81.78.13 – 10.81.78.14	10.81.78.15
133	10.81.78.16/30	10.81.78.17 – 10.81.78.18	10.81.78.19
134	10.81.78.20/30	10.81.78.21 – 10.81.78.22	10.81.78.23
135	10.81.78.24/30	10.81.78.25 – 10.81.78.26	10.81.78.27
136	10.81.78.28/30	10.81.78.29 – 10.81.78.30	10.81.78.31
137	10.81.78.32/30	10.81.78.33 – 10.81.78.34	10.81.78.35
138	10.81.78.36/30	10.81.78.37 – 10.81.78.38	10.81.78.39
139	10.81.78.40/30	10.81.78.41 – 10.81.78.42	10.81.78.43
140	10.81.78.44/30	10.81.78.45 – 10.81.78.46	10.81.78.47
141	10.81.78.48/30	10.81.78.49 – 10.81.78.50	10.81.78.51
142	10.81.78.52/30	10.81.78.53 – 10.81.78.54	10.81.78.55
143	10.81.78.56/30	10.81.78.57 – 10.81.78.58	10.81.78.59
144	10.81.78.60/30	10.81.78.61 – 10.81.78.62	10.81.78.63
145	10.81.78.64/30	10.81.78.65 – 10.81.78.66	10.81.78.67
146	10.81.78.68/30	10.81.78.69 – 10.81.78.70	10.81.78.71
147	10.81.78.72/30	10.81.78.73 – 10.81.78.74	10.81.78.75
148	10.81.78.76/30	10.81.78.77 – 10.81.78.78	10.81.78.79
149	10.81.78.80/30	10.81.78.81 – 10.81.78.82	10.81.78.83
150	10.81.78.84/30	10.81.78.85 – 10.81.78.86	10.81.78.87
151	10.81.78.88/30	10.81.78.89 – 10.81.78.90	10.81.78.91
152	10.81.78.92/30	10.81.78.93 – 10.81.78.94	10.81.78.95
153	10.81.78.96/30	10.81.78.97 – 10.81.78.98	10.81.78.99
154	10.81.78.100/30	10.81.78.101 – 10.81.78.102	10.81.78.103
155	10.81.78.104/30	10.81.78.105 – 10.81.78.106	10.81.78.107
156	10.81.78.108/30	10.81.78.109 – 10.81.78.110	10.81.78.111
157	10.81.78.112/30	10.81.78.113 – 10.81.78.114	10.81.78.115
158	10.81.78.116/30	10.81.78.117 – 10.81.78.118	10.81.78.119
159	10.81.78.120/30	10.81.78.121 – 10.81.78.122	10.81.78.123
160	10.81.78.124/30	10.81.78.125 – 10.81.78.126	10.81.78.127
161	10.81.78.128/30	10.81.78.129 – 10.81.78.130	10.81.78.131
162	10.81.78.132/30	10.81.78.133 – 10.81.78.134	10.81.78.135
163	10.81.78.136/30	10.81.78.137 – 10.81.78.138	10.81.78.139
164	10.81.78.140/30	10.81.78.141 – 10.81.78.142	10.81.78.143
165	10.81.78.144/30	10.81.78.145 – 10.81.78.146	10.81.78.147
166	10.81.78.148/30	10.81.78.149 – 10.81.78.150	10.81.78.151
167	10.81.78.152/30	10.81.78.153 – 10.81.78.154	10.81.78.155
168	10.81.78.156/30	10.81.78.157 – 10.81.78.158	10.81.78.159
169	10.81.78.160/30	10.81.78.161 – 10.81.78.162	10.81.78.163
170	10.81.78.164/30	10.81.78.165 – 10.81.78.166	10.81.78.167
171	10.81.78.168/30	10.81.78.169 – 10.81.78.170	10.81.78.171
172	10.81.78.172/30	10.81.78.173 – 10.81.78.174	10.81.78.175
173	10.81.78.176/30	10.81.78.177 – 10.81.78.178	10.81.78.179
174	10.81.78.180/30	10.81.78.181 – 10.81.78.182	10.81.78.183
175	10.81.78.184/30	10.81.78.185 – 10.81.78.186	10.81.78.187
176	10.81.78.188/30	10.81.78.189 – 10.81.78.190	10.81.78.191
177	10.81.78.192/30	10.81.78.193 – 10.81.78.194	10.81.78.195
178	10.81.78.196/30	10.81.78.197 – 10.81.78.198	10.81.78.199
179	10.81.78.200/30	10.81.78.201 – 10.81.78.202	10.81.78.203
180	10.81.78.204/30	10.81.78.205 – 10.81.78.206	10.81.78.207
181	10.81.78.208/30	10.81.78.209 – 10.81.78.210	10.81.78.211
182	10.81.78.212/30	10.81.78.213 – 10.81.78.214	10.81.78.215
183	10.81.78.216/30	10.81.78.217 – 10.81.78.218	10.81.78.219
184	10.81.78.220/30	10.81.78.221 – 10.81.78.222	10.81.78.223
185	10.81.78.224/30	10.81.78.225 – 10.81.78.226	10.81.78.227
186	10.81.78.228/30	10.81.78.229 – 10.81.78.230	10.81.78.231
187	10.81.78.232/30	10.81.78.233 – 10.81.78.234	10.81.78.235
188	10.81.78.236/30	10.81.78.237 – 10.81.78.238	10.81.78.239
189	10.81.78.240/30	10.81.78.241 – 10.81.78.242	10.81.78.243
190	10.81.78.244/30	10.81.78.245 – 10.81.78.246	10.81.78.247
191	10.81.78.248/30	10.81.78.249 – 10.81.78.250	10.81.78.251
192	10.81.78.252/30	10.81.78.253 – 10.81.78.254	10.81.78.255
193	10.81.79.0/30	10.81.79.1 – 10.81.79.2	10.81.79.3
194	10.81.79.4/30	10.81.79.5 – 10.81.79.6	10.81.79.7
195	10.81.79.8/30	10.81.79.9 – 10.81.79.10	10.81.79.11
196	10.81.79.12/30	10.81.79.13 – 10.81.79.14	10.81.79.15
197	10.81.79.16/30	10.81.79.17 – 10.81.79.18	10.81.79.19
198	10.81.79.20/30	10.81.79.21 – 10.81.79.22	10.81.79.23
199	10.81.79.24/30	10.81.79.25 – 10.81.79.26	10.81.79.27
200	10.81.79.28/30	10.81.79.29 – 10.81.79.30	10.81.79.31
201	10.81.79.32/30	10.81.79.33 – 10.81.79.34	10.81.79.35
202	10.81.79.36/30	10.81.79.37 – 10.81.79.38	10.81.79.39
203	10.81.79.40/30	10.81.79.41 – 10.81.79.42	10.81.79.43
204	10.81.79.44/30	10.81.79.45 – 10.81.79.46	10.81.79.47
205	10.81.79.48/30	10.81.79.49 – 10.81.79.50	10.81.79.51
206	10.81.79.52/30	10.81.79.53 – 10.81.79.54	10.81.79.55
207	10.81.79.56/30	10.81.79.57 – 10.81.79.58	10.81.79.59
208	10.81.79.60/30	10.81.79.61 – 10.81.79.62	10.81.79.63
209	10.81.79.64/30	10.81.79.65 – 10.81.79.66	10.81.79.67
210	10.81.79.68/30	10.81.79.69 – 10.81.79.70	10.81.79.71
211	10.81.79.72/30	10.81.79.73 – 10.81.79.74	10.81.79.75
212	10.81.79.76/30	10.81.79.77 – 10.81.79.78	10.81.79.79
213	10.81.79.80/30	10.81.79.81 – 10.81.79.82	10.81.79.83
214	10.81.79.84/30	10.81.79.85 – 10.81.79.86	10.81.79.87
215	10.81.79.88/30	10.81.79.89 – 10.81.79.90	10.81.79.91
216	10.81.79.92/30	10.81.79.93 – 10.81.79.94	10.81.79.95
217	10.81.79.96/30	10.81.79.97 – 10.81.79.98	10.81.79.99
218	10.81.79.100/30	10.81.79.101 – 10.81.79.102	10.81.79.103
219	10.81.79.104/30	10.81.79.105 – 10.81.79.106	10.81.79.107
220	10.81.79.108/30	10.81.79.109 – 10.81.79.110	10.81.79.111
221	10.81.79.112/30	10.81.79.113 – 10.81.79.114	10.81.79.115
222	10.81.79.116/30	10.81.79.117 – 10.81.79.118	10.81.79.119
223	10.81.79.120/30	10.81.79.121 – 10.81.79.122	10.81.79.123
224	10.81.79.124/30	10.81.79.125 – 10.81.79.126	10.81.79.127
225	10.81.79.128/30	10.81.79.129 – 10.81.79.130	10.81.79.131
226	10.81.79.132/30	10.81.79.133 – 10.81.79.134	10.81.79.135
227	10.81.79.136/30	10.81.79.137 – 10.81.79.138	10.81.79.139
228	10.81.79.140/30	10.81.79.141 – 10.81.79.142	10.81.79.143
229	10.81.79.144/30	10.81.79.145 – 10.81.79.146	10.81.79.147
230	10.81.79.148/30	10.81.79.149 – 10.81.79.150	10.81.79.151
231	10.81.79.152/30	10.81.79.153 – 10.81.79.154	10.81.79.155
232	10.81.79.156/30	10.81.79.157 – 10.81.79.158	10.81.79.159
233	10.81.79.160/30	10.81.79.161 – 10.81.79.162	10.81.79.163
234	10.81.79.164/30	10.81.79.165 – 10.81.79.166	10.81.79.167
235	10.81.79.168/30	10.81.79.169 – 10.81.79.170	10.81.79.171
236	10.81.79.172/30	10.81.79.173 – 10.81.79.174	10.81.79.175
237	10.81.79.176/30	10.81.79.177 – 10.81.79.178	10.81.79.179
238	10.81.79.180/30	10.81.79.181 – 10.81.79.182	10.81.79.183
239	10.81.79.184/30	10.81.79.185 – 10.81.79.186	10.81.79.187
240	10.81.79.188/30	10.81.79.189 – 10.81.79.190	10.81.79.191
241	10.81.79.192/30	10.81.79.193 – 10.81.79.194	10.81.79.195
242	10.81.79.196/30	10.81.79.197 – 10.81.79.198	10.81.79.199
243	10.81.79.200/30	10.81.79.201 – 10.81.79.202	10.81.79.203
244	10.81.79.204/30	10.81.79.205 – 10.81.79.206	10.81.79.207
245	10.81.79.208/30	10.81.79.209 – 10.81.79.210	10.81.79.211
246	10.81.79.212/30	10.81.79.213 – 10.81.79.214	10.81.79.215
247	10.81.79.216/30	10.81.79.217 – 10.81.79.218	10.81.79.219
248	10.81.79.220/30	10.81.79.221 – 10.81.79.222	10.81.79.223
249	10.81.79.224/30	10.81.79.225 – 10.81.79.226	10.81.79.227
250	10.81.79.228/30	10.81.79.229 – 10.81.79.230	10.81.79.231
251	10.81.79.232/30	10.81.79.233 – 10.81.79.234	10.81.79.235
252	10.81.79.236/30	10.81.79.237 – 10.81.79.238	10.81.79.239
253	10.81.79.240/30	10.81.79.241 – 10.81.79.242	10.81.79.243
254	10.81.79.244/30	10.81.79.245 – 10.81.79.246	10.81.79.247
255	10.81.79.248/30	10.81.79.249 – 10.81.79.250	10.81.79.251
256	10.81.79.252/30	10.81.79.253 – 10.81.79.254	10.81.79.255

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 /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 →