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)10.243.136.0/22

network10.243.136.0/22

broadcast10.243.139.255

first host10.243.136.1

last host10.243.139.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.243.136.0/22

address00001010.11110011.10001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.11110011.10001000.00000000

broadcast00001010.11110011.10001011.11111111

green = network part, grey = host part

hex0x0af38800

decimal183732224

reverse dns0.136.243.10.in-addr.arpa

ipv4-mapped::ffff:af3:8800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.243.136.0/30	10.243.136.1 – 10.243.136.2	10.243.136.3
2	10.243.136.4/30	10.243.136.5 – 10.243.136.6	10.243.136.7
3	10.243.136.8/30	10.243.136.9 – 10.243.136.10	10.243.136.11
4	10.243.136.12/30	10.243.136.13 – 10.243.136.14	10.243.136.15
5	10.243.136.16/30	10.243.136.17 – 10.243.136.18	10.243.136.19
6	10.243.136.20/30	10.243.136.21 – 10.243.136.22	10.243.136.23
7	10.243.136.24/30	10.243.136.25 – 10.243.136.26	10.243.136.27
8	10.243.136.28/30	10.243.136.29 – 10.243.136.30	10.243.136.31
9	10.243.136.32/30	10.243.136.33 – 10.243.136.34	10.243.136.35
10	10.243.136.36/30	10.243.136.37 – 10.243.136.38	10.243.136.39
11	10.243.136.40/30	10.243.136.41 – 10.243.136.42	10.243.136.43
12	10.243.136.44/30	10.243.136.45 – 10.243.136.46	10.243.136.47
13	10.243.136.48/30	10.243.136.49 – 10.243.136.50	10.243.136.51
14	10.243.136.52/30	10.243.136.53 – 10.243.136.54	10.243.136.55
15	10.243.136.56/30	10.243.136.57 – 10.243.136.58	10.243.136.59
16	10.243.136.60/30	10.243.136.61 – 10.243.136.62	10.243.136.63
17	10.243.136.64/30	10.243.136.65 – 10.243.136.66	10.243.136.67
18	10.243.136.68/30	10.243.136.69 – 10.243.136.70	10.243.136.71
19	10.243.136.72/30	10.243.136.73 – 10.243.136.74	10.243.136.75
20	10.243.136.76/30	10.243.136.77 – 10.243.136.78	10.243.136.79
21	10.243.136.80/30	10.243.136.81 – 10.243.136.82	10.243.136.83
22	10.243.136.84/30	10.243.136.85 – 10.243.136.86	10.243.136.87
23	10.243.136.88/30	10.243.136.89 – 10.243.136.90	10.243.136.91
24	10.243.136.92/30	10.243.136.93 – 10.243.136.94	10.243.136.95
25	10.243.136.96/30	10.243.136.97 – 10.243.136.98	10.243.136.99
26	10.243.136.100/30	10.243.136.101 – 10.243.136.102	10.243.136.103
27	10.243.136.104/30	10.243.136.105 – 10.243.136.106	10.243.136.107
28	10.243.136.108/30	10.243.136.109 – 10.243.136.110	10.243.136.111
29	10.243.136.112/30	10.243.136.113 – 10.243.136.114	10.243.136.115
30	10.243.136.116/30	10.243.136.117 – 10.243.136.118	10.243.136.119
31	10.243.136.120/30	10.243.136.121 – 10.243.136.122	10.243.136.123
32	10.243.136.124/30	10.243.136.125 – 10.243.136.126	10.243.136.127
33	10.243.136.128/30	10.243.136.129 – 10.243.136.130	10.243.136.131
34	10.243.136.132/30	10.243.136.133 – 10.243.136.134	10.243.136.135
35	10.243.136.136/30	10.243.136.137 – 10.243.136.138	10.243.136.139
36	10.243.136.140/30	10.243.136.141 – 10.243.136.142	10.243.136.143
37	10.243.136.144/30	10.243.136.145 – 10.243.136.146	10.243.136.147
38	10.243.136.148/30	10.243.136.149 – 10.243.136.150	10.243.136.151
39	10.243.136.152/30	10.243.136.153 – 10.243.136.154	10.243.136.155
40	10.243.136.156/30	10.243.136.157 – 10.243.136.158	10.243.136.159
41	10.243.136.160/30	10.243.136.161 – 10.243.136.162	10.243.136.163
42	10.243.136.164/30	10.243.136.165 – 10.243.136.166	10.243.136.167
43	10.243.136.168/30	10.243.136.169 – 10.243.136.170	10.243.136.171
44	10.243.136.172/30	10.243.136.173 – 10.243.136.174	10.243.136.175
45	10.243.136.176/30	10.243.136.177 – 10.243.136.178	10.243.136.179
46	10.243.136.180/30	10.243.136.181 – 10.243.136.182	10.243.136.183
47	10.243.136.184/30	10.243.136.185 – 10.243.136.186	10.243.136.187
48	10.243.136.188/30	10.243.136.189 – 10.243.136.190	10.243.136.191
49	10.243.136.192/30	10.243.136.193 – 10.243.136.194	10.243.136.195
50	10.243.136.196/30	10.243.136.197 – 10.243.136.198	10.243.136.199
51	10.243.136.200/30	10.243.136.201 – 10.243.136.202	10.243.136.203
52	10.243.136.204/30	10.243.136.205 – 10.243.136.206	10.243.136.207
53	10.243.136.208/30	10.243.136.209 – 10.243.136.210	10.243.136.211
54	10.243.136.212/30	10.243.136.213 – 10.243.136.214	10.243.136.215
55	10.243.136.216/30	10.243.136.217 – 10.243.136.218	10.243.136.219
56	10.243.136.220/30	10.243.136.221 – 10.243.136.222	10.243.136.223
57	10.243.136.224/30	10.243.136.225 – 10.243.136.226	10.243.136.227
58	10.243.136.228/30	10.243.136.229 – 10.243.136.230	10.243.136.231
59	10.243.136.232/30	10.243.136.233 – 10.243.136.234	10.243.136.235
60	10.243.136.236/30	10.243.136.237 – 10.243.136.238	10.243.136.239
61	10.243.136.240/30	10.243.136.241 – 10.243.136.242	10.243.136.243
62	10.243.136.244/30	10.243.136.245 – 10.243.136.246	10.243.136.247
63	10.243.136.248/30	10.243.136.249 – 10.243.136.250	10.243.136.251
64	10.243.136.252/30	10.243.136.253 – 10.243.136.254	10.243.136.255
65	10.243.137.0/30	10.243.137.1 – 10.243.137.2	10.243.137.3
66	10.243.137.4/30	10.243.137.5 – 10.243.137.6	10.243.137.7
67	10.243.137.8/30	10.243.137.9 – 10.243.137.10	10.243.137.11
68	10.243.137.12/30	10.243.137.13 – 10.243.137.14	10.243.137.15
69	10.243.137.16/30	10.243.137.17 – 10.243.137.18	10.243.137.19
70	10.243.137.20/30	10.243.137.21 – 10.243.137.22	10.243.137.23
71	10.243.137.24/30	10.243.137.25 – 10.243.137.26	10.243.137.27
72	10.243.137.28/30	10.243.137.29 – 10.243.137.30	10.243.137.31
73	10.243.137.32/30	10.243.137.33 – 10.243.137.34	10.243.137.35
74	10.243.137.36/30	10.243.137.37 – 10.243.137.38	10.243.137.39
75	10.243.137.40/30	10.243.137.41 – 10.243.137.42	10.243.137.43
76	10.243.137.44/30	10.243.137.45 – 10.243.137.46	10.243.137.47
77	10.243.137.48/30	10.243.137.49 – 10.243.137.50	10.243.137.51
78	10.243.137.52/30	10.243.137.53 – 10.243.137.54	10.243.137.55
79	10.243.137.56/30	10.243.137.57 – 10.243.137.58	10.243.137.59
80	10.243.137.60/30	10.243.137.61 – 10.243.137.62	10.243.137.63
81	10.243.137.64/30	10.243.137.65 – 10.243.137.66	10.243.137.67
82	10.243.137.68/30	10.243.137.69 – 10.243.137.70	10.243.137.71
83	10.243.137.72/30	10.243.137.73 – 10.243.137.74	10.243.137.75
84	10.243.137.76/30	10.243.137.77 – 10.243.137.78	10.243.137.79
85	10.243.137.80/30	10.243.137.81 – 10.243.137.82	10.243.137.83
86	10.243.137.84/30	10.243.137.85 – 10.243.137.86	10.243.137.87
87	10.243.137.88/30	10.243.137.89 – 10.243.137.90	10.243.137.91
88	10.243.137.92/30	10.243.137.93 – 10.243.137.94	10.243.137.95
89	10.243.137.96/30	10.243.137.97 – 10.243.137.98	10.243.137.99
90	10.243.137.100/30	10.243.137.101 – 10.243.137.102	10.243.137.103
91	10.243.137.104/30	10.243.137.105 – 10.243.137.106	10.243.137.107
92	10.243.137.108/30	10.243.137.109 – 10.243.137.110	10.243.137.111
93	10.243.137.112/30	10.243.137.113 – 10.243.137.114	10.243.137.115
94	10.243.137.116/30	10.243.137.117 – 10.243.137.118	10.243.137.119
95	10.243.137.120/30	10.243.137.121 – 10.243.137.122	10.243.137.123
96	10.243.137.124/30	10.243.137.125 – 10.243.137.126	10.243.137.127
97	10.243.137.128/30	10.243.137.129 – 10.243.137.130	10.243.137.131
98	10.243.137.132/30	10.243.137.133 – 10.243.137.134	10.243.137.135
99	10.243.137.136/30	10.243.137.137 – 10.243.137.138	10.243.137.139
100	10.243.137.140/30	10.243.137.141 – 10.243.137.142	10.243.137.143
101	10.243.137.144/30	10.243.137.145 – 10.243.137.146	10.243.137.147
102	10.243.137.148/30	10.243.137.149 – 10.243.137.150	10.243.137.151
103	10.243.137.152/30	10.243.137.153 – 10.243.137.154	10.243.137.155
104	10.243.137.156/30	10.243.137.157 – 10.243.137.158	10.243.137.159
105	10.243.137.160/30	10.243.137.161 – 10.243.137.162	10.243.137.163
106	10.243.137.164/30	10.243.137.165 – 10.243.137.166	10.243.137.167
107	10.243.137.168/30	10.243.137.169 – 10.243.137.170	10.243.137.171
108	10.243.137.172/30	10.243.137.173 – 10.243.137.174	10.243.137.175
109	10.243.137.176/30	10.243.137.177 – 10.243.137.178	10.243.137.179
110	10.243.137.180/30	10.243.137.181 – 10.243.137.182	10.243.137.183
111	10.243.137.184/30	10.243.137.185 – 10.243.137.186	10.243.137.187
112	10.243.137.188/30	10.243.137.189 – 10.243.137.190	10.243.137.191
113	10.243.137.192/30	10.243.137.193 – 10.243.137.194	10.243.137.195
114	10.243.137.196/30	10.243.137.197 – 10.243.137.198	10.243.137.199
115	10.243.137.200/30	10.243.137.201 – 10.243.137.202	10.243.137.203
116	10.243.137.204/30	10.243.137.205 – 10.243.137.206	10.243.137.207
117	10.243.137.208/30	10.243.137.209 – 10.243.137.210	10.243.137.211
118	10.243.137.212/30	10.243.137.213 – 10.243.137.214	10.243.137.215
119	10.243.137.216/30	10.243.137.217 – 10.243.137.218	10.243.137.219
120	10.243.137.220/30	10.243.137.221 – 10.243.137.222	10.243.137.223
121	10.243.137.224/30	10.243.137.225 – 10.243.137.226	10.243.137.227
122	10.243.137.228/30	10.243.137.229 – 10.243.137.230	10.243.137.231
123	10.243.137.232/30	10.243.137.233 – 10.243.137.234	10.243.137.235
124	10.243.137.236/30	10.243.137.237 – 10.243.137.238	10.243.137.239
125	10.243.137.240/30	10.243.137.241 – 10.243.137.242	10.243.137.243
126	10.243.137.244/30	10.243.137.245 – 10.243.137.246	10.243.137.247
127	10.243.137.248/30	10.243.137.249 – 10.243.137.250	10.243.137.251
128	10.243.137.252/30	10.243.137.253 – 10.243.137.254	10.243.137.255
129	10.243.138.0/30	10.243.138.1 – 10.243.138.2	10.243.138.3
130	10.243.138.4/30	10.243.138.5 – 10.243.138.6	10.243.138.7
131	10.243.138.8/30	10.243.138.9 – 10.243.138.10	10.243.138.11
132	10.243.138.12/30	10.243.138.13 – 10.243.138.14	10.243.138.15
133	10.243.138.16/30	10.243.138.17 – 10.243.138.18	10.243.138.19
134	10.243.138.20/30	10.243.138.21 – 10.243.138.22	10.243.138.23
135	10.243.138.24/30	10.243.138.25 – 10.243.138.26	10.243.138.27
136	10.243.138.28/30	10.243.138.29 – 10.243.138.30	10.243.138.31
137	10.243.138.32/30	10.243.138.33 – 10.243.138.34	10.243.138.35
138	10.243.138.36/30	10.243.138.37 – 10.243.138.38	10.243.138.39
139	10.243.138.40/30	10.243.138.41 – 10.243.138.42	10.243.138.43
140	10.243.138.44/30	10.243.138.45 – 10.243.138.46	10.243.138.47
141	10.243.138.48/30	10.243.138.49 – 10.243.138.50	10.243.138.51
142	10.243.138.52/30	10.243.138.53 – 10.243.138.54	10.243.138.55
143	10.243.138.56/30	10.243.138.57 – 10.243.138.58	10.243.138.59
144	10.243.138.60/30	10.243.138.61 – 10.243.138.62	10.243.138.63
145	10.243.138.64/30	10.243.138.65 – 10.243.138.66	10.243.138.67
146	10.243.138.68/30	10.243.138.69 – 10.243.138.70	10.243.138.71
147	10.243.138.72/30	10.243.138.73 – 10.243.138.74	10.243.138.75
148	10.243.138.76/30	10.243.138.77 – 10.243.138.78	10.243.138.79
149	10.243.138.80/30	10.243.138.81 – 10.243.138.82	10.243.138.83
150	10.243.138.84/30	10.243.138.85 – 10.243.138.86	10.243.138.87
151	10.243.138.88/30	10.243.138.89 – 10.243.138.90	10.243.138.91
152	10.243.138.92/30	10.243.138.93 – 10.243.138.94	10.243.138.95
153	10.243.138.96/30	10.243.138.97 – 10.243.138.98	10.243.138.99
154	10.243.138.100/30	10.243.138.101 – 10.243.138.102	10.243.138.103
155	10.243.138.104/30	10.243.138.105 – 10.243.138.106	10.243.138.107
156	10.243.138.108/30	10.243.138.109 – 10.243.138.110	10.243.138.111
157	10.243.138.112/30	10.243.138.113 – 10.243.138.114	10.243.138.115
158	10.243.138.116/30	10.243.138.117 – 10.243.138.118	10.243.138.119
159	10.243.138.120/30	10.243.138.121 – 10.243.138.122	10.243.138.123
160	10.243.138.124/30	10.243.138.125 – 10.243.138.126	10.243.138.127
161	10.243.138.128/30	10.243.138.129 – 10.243.138.130	10.243.138.131
162	10.243.138.132/30	10.243.138.133 – 10.243.138.134	10.243.138.135
163	10.243.138.136/30	10.243.138.137 – 10.243.138.138	10.243.138.139
164	10.243.138.140/30	10.243.138.141 – 10.243.138.142	10.243.138.143
165	10.243.138.144/30	10.243.138.145 – 10.243.138.146	10.243.138.147
166	10.243.138.148/30	10.243.138.149 – 10.243.138.150	10.243.138.151
167	10.243.138.152/30	10.243.138.153 – 10.243.138.154	10.243.138.155
168	10.243.138.156/30	10.243.138.157 – 10.243.138.158	10.243.138.159
169	10.243.138.160/30	10.243.138.161 – 10.243.138.162	10.243.138.163
170	10.243.138.164/30	10.243.138.165 – 10.243.138.166	10.243.138.167
171	10.243.138.168/30	10.243.138.169 – 10.243.138.170	10.243.138.171
172	10.243.138.172/30	10.243.138.173 – 10.243.138.174	10.243.138.175
173	10.243.138.176/30	10.243.138.177 – 10.243.138.178	10.243.138.179
174	10.243.138.180/30	10.243.138.181 – 10.243.138.182	10.243.138.183
175	10.243.138.184/30	10.243.138.185 – 10.243.138.186	10.243.138.187
176	10.243.138.188/30	10.243.138.189 – 10.243.138.190	10.243.138.191
177	10.243.138.192/30	10.243.138.193 – 10.243.138.194	10.243.138.195
178	10.243.138.196/30	10.243.138.197 – 10.243.138.198	10.243.138.199
179	10.243.138.200/30	10.243.138.201 – 10.243.138.202	10.243.138.203
180	10.243.138.204/30	10.243.138.205 – 10.243.138.206	10.243.138.207
181	10.243.138.208/30	10.243.138.209 – 10.243.138.210	10.243.138.211
182	10.243.138.212/30	10.243.138.213 – 10.243.138.214	10.243.138.215
183	10.243.138.216/30	10.243.138.217 – 10.243.138.218	10.243.138.219
184	10.243.138.220/30	10.243.138.221 – 10.243.138.222	10.243.138.223
185	10.243.138.224/30	10.243.138.225 – 10.243.138.226	10.243.138.227
186	10.243.138.228/30	10.243.138.229 – 10.243.138.230	10.243.138.231
187	10.243.138.232/30	10.243.138.233 – 10.243.138.234	10.243.138.235
188	10.243.138.236/30	10.243.138.237 – 10.243.138.238	10.243.138.239
189	10.243.138.240/30	10.243.138.241 – 10.243.138.242	10.243.138.243
190	10.243.138.244/30	10.243.138.245 – 10.243.138.246	10.243.138.247
191	10.243.138.248/30	10.243.138.249 – 10.243.138.250	10.243.138.251
192	10.243.138.252/30	10.243.138.253 – 10.243.138.254	10.243.138.255
193	10.243.139.0/30	10.243.139.1 – 10.243.139.2	10.243.139.3
194	10.243.139.4/30	10.243.139.5 – 10.243.139.6	10.243.139.7
195	10.243.139.8/30	10.243.139.9 – 10.243.139.10	10.243.139.11
196	10.243.139.12/30	10.243.139.13 – 10.243.139.14	10.243.139.15
197	10.243.139.16/30	10.243.139.17 – 10.243.139.18	10.243.139.19
198	10.243.139.20/30	10.243.139.21 – 10.243.139.22	10.243.139.23
199	10.243.139.24/30	10.243.139.25 – 10.243.139.26	10.243.139.27
200	10.243.139.28/30	10.243.139.29 – 10.243.139.30	10.243.139.31
201	10.243.139.32/30	10.243.139.33 – 10.243.139.34	10.243.139.35
202	10.243.139.36/30	10.243.139.37 – 10.243.139.38	10.243.139.39
203	10.243.139.40/30	10.243.139.41 – 10.243.139.42	10.243.139.43
204	10.243.139.44/30	10.243.139.45 – 10.243.139.46	10.243.139.47
205	10.243.139.48/30	10.243.139.49 – 10.243.139.50	10.243.139.51
206	10.243.139.52/30	10.243.139.53 – 10.243.139.54	10.243.139.55
207	10.243.139.56/30	10.243.139.57 – 10.243.139.58	10.243.139.59
208	10.243.139.60/30	10.243.139.61 – 10.243.139.62	10.243.139.63
209	10.243.139.64/30	10.243.139.65 – 10.243.139.66	10.243.139.67
210	10.243.139.68/30	10.243.139.69 – 10.243.139.70	10.243.139.71
211	10.243.139.72/30	10.243.139.73 – 10.243.139.74	10.243.139.75
212	10.243.139.76/30	10.243.139.77 – 10.243.139.78	10.243.139.79
213	10.243.139.80/30	10.243.139.81 – 10.243.139.82	10.243.139.83
214	10.243.139.84/30	10.243.139.85 – 10.243.139.86	10.243.139.87
215	10.243.139.88/30	10.243.139.89 – 10.243.139.90	10.243.139.91
216	10.243.139.92/30	10.243.139.93 – 10.243.139.94	10.243.139.95
217	10.243.139.96/30	10.243.139.97 – 10.243.139.98	10.243.139.99
218	10.243.139.100/30	10.243.139.101 – 10.243.139.102	10.243.139.103
219	10.243.139.104/30	10.243.139.105 – 10.243.139.106	10.243.139.107
220	10.243.139.108/30	10.243.139.109 – 10.243.139.110	10.243.139.111
221	10.243.139.112/30	10.243.139.113 – 10.243.139.114	10.243.139.115
222	10.243.139.116/30	10.243.139.117 – 10.243.139.118	10.243.139.119
223	10.243.139.120/30	10.243.139.121 – 10.243.139.122	10.243.139.123
224	10.243.139.124/30	10.243.139.125 – 10.243.139.126	10.243.139.127
225	10.243.139.128/30	10.243.139.129 – 10.243.139.130	10.243.139.131
226	10.243.139.132/30	10.243.139.133 – 10.243.139.134	10.243.139.135
227	10.243.139.136/30	10.243.139.137 – 10.243.139.138	10.243.139.139
228	10.243.139.140/30	10.243.139.141 – 10.243.139.142	10.243.139.143
229	10.243.139.144/30	10.243.139.145 – 10.243.139.146	10.243.139.147
230	10.243.139.148/30	10.243.139.149 – 10.243.139.150	10.243.139.151
231	10.243.139.152/30	10.243.139.153 – 10.243.139.154	10.243.139.155
232	10.243.139.156/30	10.243.139.157 – 10.243.139.158	10.243.139.159
233	10.243.139.160/30	10.243.139.161 – 10.243.139.162	10.243.139.163
234	10.243.139.164/30	10.243.139.165 – 10.243.139.166	10.243.139.167
235	10.243.139.168/30	10.243.139.169 – 10.243.139.170	10.243.139.171
236	10.243.139.172/30	10.243.139.173 – 10.243.139.174	10.243.139.175
237	10.243.139.176/30	10.243.139.177 – 10.243.139.178	10.243.139.179
238	10.243.139.180/30	10.243.139.181 – 10.243.139.182	10.243.139.183
239	10.243.139.184/30	10.243.139.185 – 10.243.139.186	10.243.139.187
240	10.243.139.188/30	10.243.139.189 – 10.243.139.190	10.243.139.191
241	10.243.139.192/30	10.243.139.193 – 10.243.139.194	10.243.139.195
242	10.243.139.196/30	10.243.139.197 – 10.243.139.198	10.243.139.199
243	10.243.139.200/30	10.243.139.201 – 10.243.139.202	10.243.139.203
244	10.243.139.204/30	10.243.139.205 – 10.243.139.206	10.243.139.207
245	10.243.139.208/30	10.243.139.209 – 10.243.139.210	10.243.139.211
246	10.243.139.212/30	10.243.139.213 – 10.243.139.214	10.243.139.215
247	10.243.139.216/30	10.243.139.217 – 10.243.139.218	10.243.139.219
248	10.243.139.220/30	10.243.139.221 – 10.243.139.222	10.243.139.223
249	10.243.139.224/30	10.243.139.225 – 10.243.139.226	10.243.139.227
250	10.243.139.228/30	10.243.139.229 – 10.243.139.230	10.243.139.231
251	10.243.139.232/30	10.243.139.233 – 10.243.139.234	10.243.139.235
252	10.243.139.236/30	10.243.139.237 – 10.243.139.238	10.243.139.239
253	10.243.139.240/30	10.243.139.241 – 10.243.139.242	10.243.139.243
254	10.243.139.244/30	10.243.139.245 – 10.243.139.246	10.243.139.247
255	10.243.139.248/30	10.243.139.249 – 10.243.139.250	10.243.139.251
256	10.243.139.252/30	10.243.139.253 – 10.243.139.254	10.243.139.255

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 →