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)10.243.76.0/22

network10.243.76.0/22

broadcast10.243.79.255

first host10.243.76.1

last host10.243.79.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.243.76.0/22

address00001010.11110011.01001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.11110011.01001100.00000000

broadcast00001010.11110011.01001111.11111111

green = network part, grey = host part

hex0x0af34c00

decimal183716864

reverse dns0.76.243.10.in-addr.arpa

ipv4-mapped::ffff:af3:4c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.243.76.0/30	10.243.76.1 – 10.243.76.2	10.243.76.3
2	10.243.76.4/30	10.243.76.5 – 10.243.76.6	10.243.76.7
3	10.243.76.8/30	10.243.76.9 – 10.243.76.10	10.243.76.11
4	10.243.76.12/30	10.243.76.13 – 10.243.76.14	10.243.76.15
5	10.243.76.16/30	10.243.76.17 – 10.243.76.18	10.243.76.19
6	10.243.76.20/30	10.243.76.21 – 10.243.76.22	10.243.76.23
7	10.243.76.24/30	10.243.76.25 – 10.243.76.26	10.243.76.27
8	10.243.76.28/30	10.243.76.29 – 10.243.76.30	10.243.76.31
9	10.243.76.32/30	10.243.76.33 – 10.243.76.34	10.243.76.35
10	10.243.76.36/30	10.243.76.37 – 10.243.76.38	10.243.76.39
11	10.243.76.40/30	10.243.76.41 – 10.243.76.42	10.243.76.43
12	10.243.76.44/30	10.243.76.45 – 10.243.76.46	10.243.76.47
13	10.243.76.48/30	10.243.76.49 – 10.243.76.50	10.243.76.51
14	10.243.76.52/30	10.243.76.53 – 10.243.76.54	10.243.76.55
15	10.243.76.56/30	10.243.76.57 – 10.243.76.58	10.243.76.59
16	10.243.76.60/30	10.243.76.61 – 10.243.76.62	10.243.76.63
17	10.243.76.64/30	10.243.76.65 – 10.243.76.66	10.243.76.67
18	10.243.76.68/30	10.243.76.69 – 10.243.76.70	10.243.76.71
19	10.243.76.72/30	10.243.76.73 – 10.243.76.74	10.243.76.75
20	10.243.76.76/30	10.243.76.77 – 10.243.76.78	10.243.76.79
21	10.243.76.80/30	10.243.76.81 – 10.243.76.82	10.243.76.83
22	10.243.76.84/30	10.243.76.85 – 10.243.76.86	10.243.76.87
23	10.243.76.88/30	10.243.76.89 – 10.243.76.90	10.243.76.91
24	10.243.76.92/30	10.243.76.93 – 10.243.76.94	10.243.76.95
25	10.243.76.96/30	10.243.76.97 – 10.243.76.98	10.243.76.99
26	10.243.76.100/30	10.243.76.101 – 10.243.76.102	10.243.76.103
27	10.243.76.104/30	10.243.76.105 – 10.243.76.106	10.243.76.107
28	10.243.76.108/30	10.243.76.109 – 10.243.76.110	10.243.76.111
29	10.243.76.112/30	10.243.76.113 – 10.243.76.114	10.243.76.115
30	10.243.76.116/30	10.243.76.117 – 10.243.76.118	10.243.76.119
31	10.243.76.120/30	10.243.76.121 – 10.243.76.122	10.243.76.123
32	10.243.76.124/30	10.243.76.125 – 10.243.76.126	10.243.76.127
33	10.243.76.128/30	10.243.76.129 – 10.243.76.130	10.243.76.131
34	10.243.76.132/30	10.243.76.133 – 10.243.76.134	10.243.76.135
35	10.243.76.136/30	10.243.76.137 – 10.243.76.138	10.243.76.139
36	10.243.76.140/30	10.243.76.141 – 10.243.76.142	10.243.76.143
37	10.243.76.144/30	10.243.76.145 – 10.243.76.146	10.243.76.147
38	10.243.76.148/30	10.243.76.149 – 10.243.76.150	10.243.76.151
39	10.243.76.152/30	10.243.76.153 – 10.243.76.154	10.243.76.155
40	10.243.76.156/30	10.243.76.157 – 10.243.76.158	10.243.76.159
41	10.243.76.160/30	10.243.76.161 – 10.243.76.162	10.243.76.163
42	10.243.76.164/30	10.243.76.165 – 10.243.76.166	10.243.76.167
43	10.243.76.168/30	10.243.76.169 – 10.243.76.170	10.243.76.171
44	10.243.76.172/30	10.243.76.173 – 10.243.76.174	10.243.76.175
45	10.243.76.176/30	10.243.76.177 – 10.243.76.178	10.243.76.179
46	10.243.76.180/30	10.243.76.181 – 10.243.76.182	10.243.76.183
47	10.243.76.184/30	10.243.76.185 – 10.243.76.186	10.243.76.187
48	10.243.76.188/30	10.243.76.189 – 10.243.76.190	10.243.76.191
49	10.243.76.192/30	10.243.76.193 – 10.243.76.194	10.243.76.195
50	10.243.76.196/30	10.243.76.197 – 10.243.76.198	10.243.76.199
51	10.243.76.200/30	10.243.76.201 – 10.243.76.202	10.243.76.203
52	10.243.76.204/30	10.243.76.205 – 10.243.76.206	10.243.76.207
53	10.243.76.208/30	10.243.76.209 – 10.243.76.210	10.243.76.211
54	10.243.76.212/30	10.243.76.213 – 10.243.76.214	10.243.76.215
55	10.243.76.216/30	10.243.76.217 – 10.243.76.218	10.243.76.219
56	10.243.76.220/30	10.243.76.221 – 10.243.76.222	10.243.76.223
57	10.243.76.224/30	10.243.76.225 – 10.243.76.226	10.243.76.227
58	10.243.76.228/30	10.243.76.229 – 10.243.76.230	10.243.76.231
59	10.243.76.232/30	10.243.76.233 – 10.243.76.234	10.243.76.235
60	10.243.76.236/30	10.243.76.237 – 10.243.76.238	10.243.76.239
61	10.243.76.240/30	10.243.76.241 – 10.243.76.242	10.243.76.243
62	10.243.76.244/30	10.243.76.245 – 10.243.76.246	10.243.76.247
63	10.243.76.248/30	10.243.76.249 – 10.243.76.250	10.243.76.251
64	10.243.76.252/30	10.243.76.253 – 10.243.76.254	10.243.76.255
65	10.243.77.0/30	10.243.77.1 – 10.243.77.2	10.243.77.3
66	10.243.77.4/30	10.243.77.5 – 10.243.77.6	10.243.77.7
67	10.243.77.8/30	10.243.77.9 – 10.243.77.10	10.243.77.11
68	10.243.77.12/30	10.243.77.13 – 10.243.77.14	10.243.77.15
69	10.243.77.16/30	10.243.77.17 – 10.243.77.18	10.243.77.19
70	10.243.77.20/30	10.243.77.21 – 10.243.77.22	10.243.77.23
71	10.243.77.24/30	10.243.77.25 – 10.243.77.26	10.243.77.27
72	10.243.77.28/30	10.243.77.29 – 10.243.77.30	10.243.77.31
73	10.243.77.32/30	10.243.77.33 – 10.243.77.34	10.243.77.35
74	10.243.77.36/30	10.243.77.37 – 10.243.77.38	10.243.77.39
75	10.243.77.40/30	10.243.77.41 – 10.243.77.42	10.243.77.43
76	10.243.77.44/30	10.243.77.45 – 10.243.77.46	10.243.77.47
77	10.243.77.48/30	10.243.77.49 – 10.243.77.50	10.243.77.51
78	10.243.77.52/30	10.243.77.53 – 10.243.77.54	10.243.77.55
79	10.243.77.56/30	10.243.77.57 – 10.243.77.58	10.243.77.59
80	10.243.77.60/30	10.243.77.61 – 10.243.77.62	10.243.77.63
81	10.243.77.64/30	10.243.77.65 – 10.243.77.66	10.243.77.67
82	10.243.77.68/30	10.243.77.69 – 10.243.77.70	10.243.77.71
83	10.243.77.72/30	10.243.77.73 – 10.243.77.74	10.243.77.75
84	10.243.77.76/30	10.243.77.77 – 10.243.77.78	10.243.77.79
85	10.243.77.80/30	10.243.77.81 – 10.243.77.82	10.243.77.83
86	10.243.77.84/30	10.243.77.85 – 10.243.77.86	10.243.77.87
87	10.243.77.88/30	10.243.77.89 – 10.243.77.90	10.243.77.91
88	10.243.77.92/30	10.243.77.93 – 10.243.77.94	10.243.77.95
89	10.243.77.96/30	10.243.77.97 – 10.243.77.98	10.243.77.99
90	10.243.77.100/30	10.243.77.101 – 10.243.77.102	10.243.77.103
91	10.243.77.104/30	10.243.77.105 – 10.243.77.106	10.243.77.107
92	10.243.77.108/30	10.243.77.109 – 10.243.77.110	10.243.77.111
93	10.243.77.112/30	10.243.77.113 – 10.243.77.114	10.243.77.115
94	10.243.77.116/30	10.243.77.117 – 10.243.77.118	10.243.77.119
95	10.243.77.120/30	10.243.77.121 – 10.243.77.122	10.243.77.123
96	10.243.77.124/30	10.243.77.125 – 10.243.77.126	10.243.77.127
97	10.243.77.128/30	10.243.77.129 – 10.243.77.130	10.243.77.131
98	10.243.77.132/30	10.243.77.133 – 10.243.77.134	10.243.77.135
99	10.243.77.136/30	10.243.77.137 – 10.243.77.138	10.243.77.139
100	10.243.77.140/30	10.243.77.141 – 10.243.77.142	10.243.77.143
101	10.243.77.144/30	10.243.77.145 – 10.243.77.146	10.243.77.147
102	10.243.77.148/30	10.243.77.149 – 10.243.77.150	10.243.77.151
103	10.243.77.152/30	10.243.77.153 – 10.243.77.154	10.243.77.155
104	10.243.77.156/30	10.243.77.157 – 10.243.77.158	10.243.77.159
105	10.243.77.160/30	10.243.77.161 – 10.243.77.162	10.243.77.163
106	10.243.77.164/30	10.243.77.165 – 10.243.77.166	10.243.77.167
107	10.243.77.168/30	10.243.77.169 – 10.243.77.170	10.243.77.171
108	10.243.77.172/30	10.243.77.173 – 10.243.77.174	10.243.77.175
109	10.243.77.176/30	10.243.77.177 – 10.243.77.178	10.243.77.179
110	10.243.77.180/30	10.243.77.181 – 10.243.77.182	10.243.77.183
111	10.243.77.184/30	10.243.77.185 – 10.243.77.186	10.243.77.187
112	10.243.77.188/30	10.243.77.189 – 10.243.77.190	10.243.77.191
113	10.243.77.192/30	10.243.77.193 – 10.243.77.194	10.243.77.195
114	10.243.77.196/30	10.243.77.197 – 10.243.77.198	10.243.77.199
115	10.243.77.200/30	10.243.77.201 – 10.243.77.202	10.243.77.203
116	10.243.77.204/30	10.243.77.205 – 10.243.77.206	10.243.77.207
117	10.243.77.208/30	10.243.77.209 – 10.243.77.210	10.243.77.211
118	10.243.77.212/30	10.243.77.213 – 10.243.77.214	10.243.77.215
119	10.243.77.216/30	10.243.77.217 – 10.243.77.218	10.243.77.219
120	10.243.77.220/30	10.243.77.221 – 10.243.77.222	10.243.77.223
121	10.243.77.224/30	10.243.77.225 – 10.243.77.226	10.243.77.227
122	10.243.77.228/30	10.243.77.229 – 10.243.77.230	10.243.77.231
123	10.243.77.232/30	10.243.77.233 – 10.243.77.234	10.243.77.235
124	10.243.77.236/30	10.243.77.237 – 10.243.77.238	10.243.77.239
125	10.243.77.240/30	10.243.77.241 – 10.243.77.242	10.243.77.243
126	10.243.77.244/30	10.243.77.245 – 10.243.77.246	10.243.77.247
127	10.243.77.248/30	10.243.77.249 – 10.243.77.250	10.243.77.251
128	10.243.77.252/30	10.243.77.253 – 10.243.77.254	10.243.77.255
129	10.243.78.0/30	10.243.78.1 – 10.243.78.2	10.243.78.3
130	10.243.78.4/30	10.243.78.5 – 10.243.78.6	10.243.78.7
131	10.243.78.8/30	10.243.78.9 – 10.243.78.10	10.243.78.11
132	10.243.78.12/30	10.243.78.13 – 10.243.78.14	10.243.78.15
133	10.243.78.16/30	10.243.78.17 – 10.243.78.18	10.243.78.19
134	10.243.78.20/30	10.243.78.21 – 10.243.78.22	10.243.78.23
135	10.243.78.24/30	10.243.78.25 – 10.243.78.26	10.243.78.27
136	10.243.78.28/30	10.243.78.29 – 10.243.78.30	10.243.78.31
137	10.243.78.32/30	10.243.78.33 – 10.243.78.34	10.243.78.35
138	10.243.78.36/30	10.243.78.37 – 10.243.78.38	10.243.78.39
139	10.243.78.40/30	10.243.78.41 – 10.243.78.42	10.243.78.43
140	10.243.78.44/30	10.243.78.45 – 10.243.78.46	10.243.78.47
141	10.243.78.48/30	10.243.78.49 – 10.243.78.50	10.243.78.51
142	10.243.78.52/30	10.243.78.53 – 10.243.78.54	10.243.78.55
143	10.243.78.56/30	10.243.78.57 – 10.243.78.58	10.243.78.59
144	10.243.78.60/30	10.243.78.61 – 10.243.78.62	10.243.78.63
145	10.243.78.64/30	10.243.78.65 – 10.243.78.66	10.243.78.67
146	10.243.78.68/30	10.243.78.69 – 10.243.78.70	10.243.78.71
147	10.243.78.72/30	10.243.78.73 – 10.243.78.74	10.243.78.75
148	10.243.78.76/30	10.243.78.77 – 10.243.78.78	10.243.78.79
149	10.243.78.80/30	10.243.78.81 – 10.243.78.82	10.243.78.83
150	10.243.78.84/30	10.243.78.85 – 10.243.78.86	10.243.78.87
151	10.243.78.88/30	10.243.78.89 – 10.243.78.90	10.243.78.91
152	10.243.78.92/30	10.243.78.93 – 10.243.78.94	10.243.78.95
153	10.243.78.96/30	10.243.78.97 – 10.243.78.98	10.243.78.99
154	10.243.78.100/30	10.243.78.101 – 10.243.78.102	10.243.78.103
155	10.243.78.104/30	10.243.78.105 – 10.243.78.106	10.243.78.107
156	10.243.78.108/30	10.243.78.109 – 10.243.78.110	10.243.78.111
157	10.243.78.112/30	10.243.78.113 – 10.243.78.114	10.243.78.115
158	10.243.78.116/30	10.243.78.117 – 10.243.78.118	10.243.78.119
159	10.243.78.120/30	10.243.78.121 – 10.243.78.122	10.243.78.123
160	10.243.78.124/30	10.243.78.125 – 10.243.78.126	10.243.78.127
161	10.243.78.128/30	10.243.78.129 – 10.243.78.130	10.243.78.131
162	10.243.78.132/30	10.243.78.133 – 10.243.78.134	10.243.78.135
163	10.243.78.136/30	10.243.78.137 – 10.243.78.138	10.243.78.139
164	10.243.78.140/30	10.243.78.141 – 10.243.78.142	10.243.78.143
165	10.243.78.144/30	10.243.78.145 – 10.243.78.146	10.243.78.147
166	10.243.78.148/30	10.243.78.149 – 10.243.78.150	10.243.78.151
167	10.243.78.152/30	10.243.78.153 – 10.243.78.154	10.243.78.155
168	10.243.78.156/30	10.243.78.157 – 10.243.78.158	10.243.78.159
169	10.243.78.160/30	10.243.78.161 – 10.243.78.162	10.243.78.163
170	10.243.78.164/30	10.243.78.165 – 10.243.78.166	10.243.78.167
171	10.243.78.168/30	10.243.78.169 – 10.243.78.170	10.243.78.171
172	10.243.78.172/30	10.243.78.173 – 10.243.78.174	10.243.78.175
173	10.243.78.176/30	10.243.78.177 – 10.243.78.178	10.243.78.179
174	10.243.78.180/30	10.243.78.181 – 10.243.78.182	10.243.78.183
175	10.243.78.184/30	10.243.78.185 – 10.243.78.186	10.243.78.187
176	10.243.78.188/30	10.243.78.189 – 10.243.78.190	10.243.78.191
177	10.243.78.192/30	10.243.78.193 – 10.243.78.194	10.243.78.195
178	10.243.78.196/30	10.243.78.197 – 10.243.78.198	10.243.78.199
179	10.243.78.200/30	10.243.78.201 – 10.243.78.202	10.243.78.203
180	10.243.78.204/30	10.243.78.205 – 10.243.78.206	10.243.78.207
181	10.243.78.208/30	10.243.78.209 – 10.243.78.210	10.243.78.211
182	10.243.78.212/30	10.243.78.213 – 10.243.78.214	10.243.78.215
183	10.243.78.216/30	10.243.78.217 – 10.243.78.218	10.243.78.219
184	10.243.78.220/30	10.243.78.221 – 10.243.78.222	10.243.78.223
185	10.243.78.224/30	10.243.78.225 – 10.243.78.226	10.243.78.227
186	10.243.78.228/30	10.243.78.229 – 10.243.78.230	10.243.78.231
187	10.243.78.232/30	10.243.78.233 – 10.243.78.234	10.243.78.235
188	10.243.78.236/30	10.243.78.237 – 10.243.78.238	10.243.78.239
189	10.243.78.240/30	10.243.78.241 – 10.243.78.242	10.243.78.243
190	10.243.78.244/30	10.243.78.245 – 10.243.78.246	10.243.78.247
191	10.243.78.248/30	10.243.78.249 – 10.243.78.250	10.243.78.251
192	10.243.78.252/30	10.243.78.253 – 10.243.78.254	10.243.78.255
193	10.243.79.0/30	10.243.79.1 – 10.243.79.2	10.243.79.3
194	10.243.79.4/30	10.243.79.5 – 10.243.79.6	10.243.79.7
195	10.243.79.8/30	10.243.79.9 – 10.243.79.10	10.243.79.11
196	10.243.79.12/30	10.243.79.13 – 10.243.79.14	10.243.79.15
197	10.243.79.16/30	10.243.79.17 – 10.243.79.18	10.243.79.19
198	10.243.79.20/30	10.243.79.21 – 10.243.79.22	10.243.79.23
199	10.243.79.24/30	10.243.79.25 – 10.243.79.26	10.243.79.27
200	10.243.79.28/30	10.243.79.29 – 10.243.79.30	10.243.79.31
201	10.243.79.32/30	10.243.79.33 – 10.243.79.34	10.243.79.35
202	10.243.79.36/30	10.243.79.37 – 10.243.79.38	10.243.79.39
203	10.243.79.40/30	10.243.79.41 – 10.243.79.42	10.243.79.43
204	10.243.79.44/30	10.243.79.45 – 10.243.79.46	10.243.79.47
205	10.243.79.48/30	10.243.79.49 – 10.243.79.50	10.243.79.51
206	10.243.79.52/30	10.243.79.53 – 10.243.79.54	10.243.79.55
207	10.243.79.56/30	10.243.79.57 – 10.243.79.58	10.243.79.59
208	10.243.79.60/30	10.243.79.61 – 10.243.79.62	10.243.79.63
209	10.243.79.64/30	10.243.79.65 – 10.243.79.66	10.243.79.67
210	10.243.79.68/30	10.243.79.69 – 10.243.79.70	10.243.79.71
211	10.243.79.72/30	10.243.79.73 – 10.243.79.74	10.243.79.75
212	10.243.79.76/30	10.243.79.77 – 10.243.79.78	10.243.79.79
213	10.243.79.80/30	10.243.79.81 – 10.243.79.82	10.243.79.83
214	10.243.79.84/30	10.243.79.85 – 10.243.79.86	10.243.79.87
215	10.243.79.88/30	10.243.79.89 – 10.243.79.90	10.243.79.91
216	10.243.79.92/30	10.243.79.93 – 10.243.79.94	10.243.79.95
217	10.243.79.96/30	10.243.79.97 – 10.243.79.98	10.243.79.99
218	10.243.79.100/30	10.243.79.101 – 10.243.79.102	10.243.79.103
219	10.243.79.104/30	10.243.79.105 – 10.243.79.106	10.243.79.107
220	10.243.79.108/30	10.243.79.109 – 10.243.79.110	10.243.79.111
221	10.243.79.112/30	10.243.79.113 – 10.243.79.114	10.243.79.115
222	10.243.79.116/30	10.243.79.117 – 10.243.79.118	10.243.79.119
223	10.243.79.120/30	10.243.79.121 – 10.243.79.122	10.243.79.123
224	10.243.79.124/30	10.243.79.125 – 10.243.79.126	10.243.79.127
225	10.243.79.128/30	10.243.79.129 – 10.243.79.130	10.243.79.131
226	10.243.79.132/30	10.243.79.133 – 10.243.79.134	10.243.79.135
227	10.243.79.136/30	10.243.79.137 – 10.243.79.138	10.243.79.139
228	10.243.79.140/30	10.243.79.141 – 10.243.79.142	10.243.79.143
229	10.243.79.144/30	10.243.79.145 – 10.243.79.146	10.243.79.147
230	10.243.79.148/30	10.243.79.149 – 10.243.79.150	10.243.79.151
231	10.243.79.152/30	10.243.79.153 – 10.243.79.154	10.243.79.155
232	10.243.79.156/30	10.243.79.157 – 10.243.79.158	10.243.79.159
233	10.243.79.160/30	10.243.79.161 – 10.243.79.162	10.243.79.163
234	10.243.79.164/30	10.243.79.165 – 10.243.79.166	10.243.79.167
235	10.243.79.168/30	10.243.79.169 – 10.243.79.170	10.243.79.171
236	10.243.79.172/30	10.243.79.173 – 10.243.79.174	10.243.79.175
237	10.243.79.176/30	10.243.79.177 – 10.243.79.178	10.243.79.179
238	10.243.79.180/30	10.243.79.181 – 10.243.79.182	10.243.79.183
239	10.243.79.184/30	10.243.79.185 – 10.243.79.186	10.243.79.187
240	10.243.79.188/30	10.243.79.189 – 10.243.79.190	10.243.79.191
241	10.243.79.192/30	10.243.79.193 – 10.243.79.194	10.243.79.195
242	10.243.79.196/30	10.243.79.197 – 10.243.79.198	10.243.79.199
243	10.243.79.200/30	10.243.79.201 – 10.243.79.202	10.243.79.203
244	10.243.79.204/30	10.243.79.205 – 10.243.79.206	10.243.79.207
245	10.243.79.208/30	10.243.79.209 – 10.243.79.210	10.243.79.211
246	10.243.79.212/30	10.243.79.213 – 10.243.79.214	10.243.79.215
247	10.243.79.216/30	10.243.79.217 – 10.243.79.218	10.243.79.219
248	10.243.79.220/30	10.243.79.221 – 10.243.79.222	10.243.79.223
249	10.243.79.224/30	10.243.79.225 – 10.243.79.226	10.243.79.227
250	10.243.79.228/30	10.243.79.229 – 10.243.79.230	10.243.79.231
251	10.243.79.232/30	10.243.79.233 – 10.243.79.234	10.243.79.235
252	10.243.79.236/30	10.243.79.237 – 10.243.79.238	10.243.79.239
253	10.243.79.240/30	10.243.79.241 – 10.243.79.242	10.243.79.243
254	10.243.79.244/30	10.243.79.245 – 10.243.79.246	10.243.79.247
255	10.243.79.248/30	10.243.79.249 – 10.243.79.250	10.243.79.251
256	10.243.79.252/30	10.243.79.253 – 10.243.79.254	10.243.79.255

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 →