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)10.149.36.0/22

network10.149.36.0/22

broadcast10.149.39.255

first host10.149.36.1

last host10.149.39.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.149.36.0/22

address00001010.10010101.00100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010101.00100100.00000000

broadcast00001010.10010101.00100111.11111111

green = network part, grey = host part

hex0x0a952400

decimal177546240

reverse dns0.36.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:2400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.149.36.0/30	10.149.36.1 – 10.149.36.2	10.149.36.3
2	10.149.36.4/30	10.149.36.5 – 10.149.36.6	10.149.36.7
3	10.149.36.8/30	10.149.36.9 – 10.149.36.10	10.149.36.11
4	10.149.36.12/30	10.149.36.13 – 10.149.36.14	10.149.36.15
5	10.149.36.16/30	10.149.36.17 – 10.149.36.18	10.149.36.19
6	10.149.36.20/30	10.149.36.21 – 10.149.36.22	10.149.36.23
7	10.149.36.24/30	10.149.36.25 – 10.149.36.26	10.149.36.27
8	10.149.36.28/30	10.149.36.29 – 10.149.36.30	10.149.36.31
9	10.149.36.32/30	10.149.36.33 – 10.149.36.34	10.149.36.35
10	10.149.36.36/30	10.149.36.37 – 10.149.36.38	10.149.36.39
11	10.149.36.40/30	10.149.36.41 – 10.149.36.42	10.149.36.43
12	10.149.36.44/30	10.149.36.45 – 10.149.36.46	10.149.36.47
13	10.149.36.48/30	10.149.36.49 – 10.149.36.50	10.149.36.51
14	10.149.36.52/30	10.149.36.53 – 10.149.36.54	10.149.36.55
15	10.149.36.56/30	10.149.36.57 – 10.149.36.58	10.149.36.59
16	10.149.36.60/30	10.149.36.61 – 10.149.36.62	10.149.36.63
17	10.149.36.64/30	10.149.36.65 – 10.149.36.66	10.149.36.67
18	10.149.36.68/30	10.149.36.69 – 10.149.36.70	10.149.36.71
19	10.149.36.72/30	10.149.36.73 – 10.149.36.74	10.149.36.75
20	10.149.36.76/30	10.149.36.77 – 10.149.36.78	10.149.36.79
21	10.149.36.80/30	10.149.36.81 – 10.149.36.82	10.149.36.83
22	10.149.36.84/30	10.149.36.85 – 10.149.36.86	10.149.36.87
23	10.149.36.88/30	10.149.36.89 – 10.149.36.90	10.149.36.91
24	10.149.36.92/30	10.149.36.93 – 10.149.36.94	10.149.36.95
25	10.149.36.96/30	10.149.36.97 – 10.149.36.98	10.149.36.99
26	10.149.36.100/30	10.149.36.101 – 10.149.36.102	10.149.36.103
27	10.149.36.104/30	10.149.36.105 – 10.149.36.106	10.149.36.107
28	10.149.36.108/30	10.149.36.109 – 10.149.36.110	10.149.36.111
29	10.149.36.112/30	10.149.36.113 – 10.149.36.114	10.149.36.115
30	10.149.36.116/30	10.149.36.117 – 10.149.36.118	10.149.36.119
31	10.149.36.120/30	10.149.36.121 – 10.149.36.122	10.149.36.123
32	10.149.36.124/30	10.149.36.125 – 10.149.36.126	10.149.36.127
33	10.149.36.128/30	10.149.36.129 – 10.149.36.130	10.149.36.131
34	10.149.36.132/30	10.149.36.133 – 10.149.36.134	10.149.36.135
35	10.149.36.136/30	10.149.36.137 – 10.149.36.138	10.149.36.139
36	10.149.36.140/30	10.149.36.141 – 10.149.36.142	10.149.36.143
37	10.149.36.144/30	10.149.36.145 – 10.149.36.146	10.149.36.147
38	10.149.36.148/30	10.149.36.149 – 10.149.36.150	10.149.36.151
39	10.149.36.152/30	10.149.36.153 – 10.149.36.154	10.149.36.155
40	10.149.36.156/30	10.149.36.157 – 10.149.36.158	10.149.36.159
41	10.149.36.160/30	10.149.36.161 – 10.149.36.162	10.149.36.163
42	10.149.36.164/30	10.149.36.165 – 10.149.36.166	10.149.36.167
43	10.149.36.168/30	10.149.36.169 – 10.149.36.170	10.149.36.171
44	10.149.36.172/30	10.149.36.173 – 10.149.36.174	10.149.36.175
45	10.149.36.176/30	10.149.36.177 – 10.149.36.178	10.149.36.179
46	10.149.36.180/30	10.149.36.181 – 10.149.36.182	10.149.36.183
47	10.149.36.184/30	10.149.36.185 – 10.149.36.186	10.149.36.187
48	10.149.36.188/30	10.149.36.189 – 10.149.36.190	10.149.36.191
49	10.149.36.192/30	10.149.36.193 – 10.149.36.194	10.149.36.195
50	10.149.36.196/30	10.149.36.197 – 10.149.36.198	10.149.36.199
51	10.149.36.200/30	10.149.36.201 – 10.149.36.202	10.149.36.203
52	10.149.36.204/30	10.149.36.205 – 10.149.36.206	10.149.36.207
53	10.149.36.208/30	10.149.36.209 – 10.149.36.210	10.149.36.211
54	10.149.36.212/30	10.149.36.213 – 10.149.36.214	10.149.36.215
55	10.149.36.216/30	10.149.36.217 – 10.149.36.218	10.149.36.219
56	10.149.36.220/30	10.149.36.221 – 10.149.36.222	10.149.36.223
57	10.149.36.224/30	10.149.36.225 – 10.149.36.226	10.149.36.227
58	10.149.36.228/30	10.149.36.229 – 10.149.36.230	10.149.36.231
59	10.149.36.232/30	10.149.36.233 – 10.149.36.234	10.149.36.235
60	10.149.36.236/30	10.149.36.237 – 10.149.36.238	10.149.36.239
61	10.149.36.240/30	10.149.36.241 – 10.149.36.242	10.149.36.243
62	10.149.36.244/30	10.149.36.245 – 10.149.36.246	10.149.36.247
63	10.149.36.248/30	10.149.36.249 – 10.149.36.250	10.149.36.251
64	10.149.36.252/30	10.149.36.253 – 10.149.36.254	10.149.36.255
65	10.149.37.0/30	10.149.37.1 – 10.149.37.2	10.149.37.3
66	10.149.37.4/30	10.149.37.5 – 10.149.37.6	10.149.37.7
67	10.149.37.8/30	10.149.37.9 – 10.149.37.10	10.149.37.11
68	10.149.37.12/30	10.149.37.13 – 10.149.37.14	10.149.37.15
69	10.149.37.16/30	10.149.37.17 – 10.149.37.18	10.149.37.19
70	10.149.37.20/30	10.149.37.21 – 10.149.37.22	10.149.37.23
71	10.149.37.24/30	10.149.37.25 – 10.149.37.26	10.149.37.27
72	10.149.37.28/30	10.149.37.29 – 10.149.37.30	10.149.37.31
73	10.149.37.32/30	10.149.37.33 – 10.149.37.34	10.149.37.35
74	10.149.37.36/30	10.149.37.37 – 10.149.37.38	10.149.37.39
75	10.149.37.40/30	10.149.37.41 – 10.149.37.42	10.149.37.43
76	10.149.37.44/30	10.149.37.45 – 10.149.37.46	10.149.37.47
77	10.149.37.48/30	10.149.37.49 – 10.149.37.50	10.149.37.51
78	10.149.37.52/30	10.149.37.53 – 10.149.37.54	10.149.37.55
79	10.149.37.56/30	10.149.37.57 – 10.149.37.58	10.149.37.59
80	10.149.37.60/30	10.149.37.61 – 10.149.37.62	10.149.37.63
81	10.149.37.64/30	10.149.37.65 – 10.149.37.66	10.149.37.67
82	10.149.37.68/30	10.149.37.69 – 10.149.37.70	10.149.37.71
83	10.149.37.72/30	10.149.37.73 – 10.149.37.74	10.149.37.75
84	10.149.37.76/30	10.149.37.77 – 10.149.37.78	10.149.37.79
85	10.149.37.80/30	10.149.37.81 – 10.149.37.82	10.149.37.83
86	10.149.37.84/30	10.149.37.85 – 10.149.37.86	10.149.37.87
87	10.149.37.88/30	10.149.37.89 – 10.149.37.90	10.149.37.91
88	10.149.37.92/30	10.149.37.93 – 10.149.37.94	10.149.37.95
89	10.149.37.96/30	10.149.37.97 – 10.149.37.98	10.149.37.99
90	10.149.37.100/30	10.149.37.101 – 10.149.37.102	10.149.37.103
91	10.149.37.104/30	10.149.37.105 – 10.149.37.106	10.149.37.107
92	10.149.37.108/30	10.149.37.109 – 10.149.37.110	10.149.37.111
93	10.149.37.112/30	10.149.37.113 – 10.149.37.114	10.149.37.115
94	10.149.37.116/30	10.149.37.117 – 10.149.37.118	10.149.37.119
95	10.149.37.120/30	10.149.37.121 – 10.149.37.122	10.149.37.123
96	10.149.37.124/30	10.149.37.125 – 10.149.37.126	10.149.37.127
97	10.149.37.128/30	10.149.37.129 – 10.149.37.130	10.149.37.131
98	10.149.37.132/30	10.149.37.133 – 10.149.37.134	10.149.37.135
99	10.149.37.136/30	10.149.37.137 – 10.149.37.138	10.149.37.139
100	10.149.37.140/30	10.149.37.141 – 10.149.37.142	10.149.37.143
101	10.149.37.144/30	10.149.37.145 – 10.149.37.146	10.149.37.147
102	10.149.37.148/30	10.149.37.149 – 10.149.37.150	10.149.37.151
103	10.149.37.152/30	10.149.37.153 – 10.149.37.154	10.149.37.155
104	10.149.37.156/30	10.149.37.157 – 10.149.37.158	10.149.37.159
105	10.149.37.160/30	10.149.37.161 – 10.149.37.162	10.149.37.163
106	10.149.37.164/30	10.149.37.165 – 10.149.37.166	10.149.37.167
107	10.149.37.168/30	10.149.37.169 – 10.149.37.170	10.149.37.171
108	10.149.37.172/30	10.149.37.173 – 10.149.37.174	10.149.37.175
109	10.149.37.176/30	10.149.37.177 – 10.149.37.178	10.149.37.179
110	10.149.37.180/30	10.149.37.181 – 10.149.37.182	10.149.37.183
111	10.149.37.184/30	10.149.37.185 – 10.149.37.186	10.149.37.187
112	10.149.37.188/30	10.149.37.189 – 10.149.37.190	10.149.37.191
113	10.149.37.192/30	10.149.37.193 – 10.149.37.194	10.149.37.195
114	10.149.37.196/30	10.149.37.197 – 10.149.37.198	10.149.37.199
115	10.149.37.200/30	10.149.37.201 – 10.149.37.202	10.149.37.203
116	10.149.37.204/30	10.149.37.205 – 10.149.37.206	10.149.37.207
117	10.149.37.208/30	10.149.37.209 – 10.149.37.210	10.149.37.211
118	10.149.37.212/30	10.149.37.213 – 10.149.37.214	10.149.37.215
119	10.149.37.216/30	10.149.37.217 – 10.149.37.218	10.149.37.219
120	10.149.37.220/30	10.149.37.221 – 10.149.37.222	10.149.37.223
121	10.149.37.224/30	10.149.37.225 – 10.149.37.226	10.149.37.227
122	10.149.37.228/30	10.149.37.229 – 10.149.37.230	10.149.37.231
123	10.149.37.232/30	10.149.37.233 – 10.149.37.234	10.149.37.235
124	10.149.37.236/30	10.149.37.237 – 10.149.37.238	10.149.37.239
125	10.149.37.240/30	10.149.37.241 – 10.149.37.242	10.149.37.243
126	10.149.37.244/30	10.149.37.245 – 10.149.37.246	10.149.37.247
127	10.149.37.248/30	10.149.37.249 – 10.149.37.250	10.149.37.251
128	10.149.37.252/30	10.149.37.253 – 10.149.37.254	10.149.37.255
129	10.149.38.0/30	10.149.38.1 – 10.149.38.2	10.149.38.3
130	10.149.38.4/30	10.149.38.5 – 10.149.38.6	10.149.38.7
131	10.149.38.8/30	10.149.38.9 – 10.149.38.10	10.149.38.11
132	10.149.38.12/30	10.149.38.13 – 10.149.38.14	10.149.38.15
133	10.149.38.16/30	10.149.38.17 – 10.149.38.18	10.149.38.19
134	10.149.38.20/30	10.149.38.21 – 10.149.38.22	10.149.38.23
135	10.149.38.24/30	10.149.38.25 – 10.149.38.26	10.149.38.27
136	10.149.38.28/30	10.149.38.29 – 10.149.38.30	10.149.38.31
137	10.149.38.32/30	10.149.38.33 – 10.149.38.34	10.149.38.35
138	10.149.38.36/30	10.149.38.37 – 10.149.38.38	10.149.38.39
139	10.149.38.40/30	10.149.38.41 – 10.149.38.42	10.149.38.43
140	10.149.38.44/30	10.149.38.45 – 10.149.38.46	10.149.38.47
141	10.149.38.48/30	10.149.38.49 – 10.149.38.50	10.149.38.51
142	10.149.38.52/30	10.149.38.53 – 10.149.38.54	10.149.38.55
143	10.149.38.56/30	10.149.38.57 – 10.149.38.58	10.149.38.59
144	10.149.38.60/30	10.149.38.61 – 10.149.38.62	10.149.38.63
145	10.149.38.64/30	10.149.38.65 – 10.149.38.66	10.149.38.67
146	10.149.38.68/30	10.149.38.69 – 10.149.38.70	10.149.38.71
147	10.149.38.72/30	10.149.38.73 – 10.149.38.74	10.149.38.75
148	10.149.38.76/30	10.149.38.77 – 10.149.38.78	10.149.38.79
149	10.149.38.80/30	10.149.38.81 – 10.149.38.82	10.149.38.83
150	10.149.38.84/30	10.149.38.85 – 10.149.38.86	10.149.38.87
151	10.149.38.88/30	10.149.38.89 – 10.149.38.90	10.149.38.91
152	10.149.38.92/30	10.149.38.93 – 10.149.38.94	10.149.38.95
153	10.149.38.96/30	10.149.38.97 – 10.149.38.98	10.149.38.99
154	10.149.38.100/30	10.149.38.101 – 10.149.38.102	10.149.38.103
155	10.149.38.104/30	10.149.38.105 – 10.149.38.106	10.149.38.107
156	10.149.38.108/30	10.149.38.109 – 10.149.38.110	10.149.38.111
157	10.149.38.112/30	10.149.38.113 – 10.149.38.114	10.149.38.115
158	10.149.38.116/30	10.149.38.117 – 10.149.38.118	10.149.38.119
159	10.149.38.120/30	10.149.38.121 – 10.149.38.122	10.149.38.123
160	10.149.38.124/30	10.149.38.125 – 10.149.38.126	10.149.38.127
161	10.149.38.128/30	10.149.38.129 – 10.149.38.130	10.149.38.131
162	10.149.38.132/30	10.149.38.133 – 10.149.38.134	10.149.38.135
163	10.149.38.136/30	10.149.38.137 – 10.149.38.138	10.149.38.139
164	10.149.38.140/30	10.149.38.141 – 10.149.38.142	10.149.38.143
165	10.149.38.144/30	10.149.38.145 – 10.149.38.146	10.149.38.147
166	10.149.38.148/30	10.149.38.149 – 10.149.38.150	10.149.38.151
167	10.149.38.152/30	10.149.38.153 – 10.149.38.154	10.149.38.155
168	10.149.38.156/30	10.149.38.157 – 10.149.38.158	10.149.38.159
169	10.149.38.160/30	10.149.38.161 – 10.149.38.162	10.149.38.163
170	10.149.38.164/30	10.149.38.165 – 10.149.38.166	10.149.38.167
171	10.149.38.168/30	10.149.38.169 – 10.149.38.170	10.149.38.171
172	10.149.38.172/30	10.149.38.173 – 10.149.38.174	10.149.38.175
173	10.149.38.176/30	10.149.38.177 – 10.149.38.178	10.149.38.179
174	10.149.38.180/30	10.149.38.181 – 10.149.38.182	10.149.38.183
175	10.149.38.184/30	10.149.38.185 – 10.149.38.186	10.149.38.187
176	10.149.38.188/30	10.149.38.189 – 10.149.38.190	10.149.38.191
177	10.149.38.192/30	10.149.38.193 – 10.149.38.194	10.149.38.195
178	10.149.38.196/30	10.149.38.197 – 10.149.38.198	10.149.38.199
179	10.149.38.200/30	10.149.38.201 – 10.149.38.202	10.149.38.203
180	10.149.38.204/30	10.149.38.205 – 10.149.38.206	10.149.38.207
181	10.149.38.208/30	10.149.38.209 – 10.149.38.210	10.149.38.211
182	10.149.38.212/30	10.149.38.213 – 10.149.38.214	10.149.38.215
183	10.149.38.216/30	10.149.38.217 – 10.149.38.218	10.149.38.219
184	10.149.38.220/30	10.149.38.221 – 10.149.38.222	10.149.38.223
185	10.149.38.224/30	10.149.38.225 – 10.149.38.226	10.149.38.227
186	10.149.38.228/30	10.149.38.229 – 10.149.38.230	10.149.38.231
187	10.149.38.232/30	10.149.38.233 – 10.149.38.234	10.149.38.235
188	10.149.38.236/30	10.149.38.237 – 10.149.38.238	10.149.38.239
189	10.149.38.240/30	10.149.38.241 – 10.149.38.242	10.149.38.243
190	10.149.38.244/30	10.149.38.245 – 10.149.38.246	10.149.38.247
191	10.149.38.248/30	10.149.38.249 – 10.149.38.250	10.149.38.251
192	10.149.38.252/30	10.149.38.253 – 10.149.38.254	10.149.38.255
193	10.149.39.0/30	10.149.39.1 – 10.149.39.2	10.149.39.3
194	10.149.39.4/30	10.149.39.5 – 10.149.39.6	10.149.39.7
195	10.149.39.8/30	10.149.39.9 – 10.149.39.10	10.149.39.11
196	10.149.39.12/30	10.149.39.13 – 10.149.39.14	10.149.39.15
197	10.149.39.16/30	10.149.39.17 – 10.149.39.18	10.149.39.19
198	10.149.39.20/30	10.149.39.21 – 10.149.39.22	10.149.39.23
199	10.149.39.24/30	10.149.39.25 – 10.149.39.26	10.149.39.27
200	10.149.39.28/30	10.149.39.29 – 10.149.39.30	10.149.39.31
201	10.149.39.32/30	10.149.39.33 – 10.149.39.34	10.149.39.35
202	10.149.39.36/30	10.149.39.37 – 10.149.39.38	10.149.39.39
203	10.149.39.40/30	10.149.39.41 – 10.149.39.42	10.149.39.43
204	10.149.39.44/30	10.149.39.45 – 10.149.39.46	10.149.39.47
205	10.149.39.48/30	10.149.39.49 – 10.149.39.50	10.149.39.51
206	10.149.39.52/30	10.149.39.53 – 10.149.39.54	10.149.39.55
207	10.149.39.56/30	10.149.39.57 – 10.149.39.58	10.149.39.59
208	10.149.39.60/30	10.149.39.61 – 10.149.39.62	10.149.39.63
209	10.149.39.64/30	10.149.39.65 – 10.149.39.66	10.149.39.67
210	10.149.39.68/30	10.149.39.69 – 10.149.39.70	10.149.39.71
211	10.149.39.72/30	10.149.39.73 – 10.149.39.74	10.149.39.75
212	10.149.39.76/30	10.149.39.77 – 10.149.39.78	10.149.39.79
213	10.149.39.80/30	10.149.39.81 – 10.149.39.82	10.149.39.83
214	10.149.39.84/30	10.149.39.85 – 10.149.39.86	10.149.39.87
215	10.149.39.88/30	10.149.39.89 – 10.149.39.90	10.149.39.91
216	10.149.39.92/30	10.149.39.93 – 10.149.39.94	10.149.39.95
217	10.149.39.96/30	10.149.39.97 – 10.149.39.98	10.149.39.99
218	10.149.39.100/30	10.149.39.101 – 10.149.39.102	10.149.39.103
219	10.149.39.104/30	10.149.39.105 – 10.149.39.106	10.149.39.107
220	10.149.39.108/30	10.149.39.109 – 10.149.39.110	10.149.39.111
221	10.149.39.112/30	10.149.39.113 – 10.149.39.114	10.149.39.115
222	10.149.39.116/30	10.149.39.117 – 10.149.39.118	10.149.39.119
223	10.149.39.120/30	10.149.39.121 – 10.149.39.122	10.149.39.123
224	10.149.39.124/30	10.149.39.125 – 10.149.39.126	10.149.39.127
225	10.149.39.128/30	10.149.39.129 – 10.149.39.130	10.149.39.131
226	10.149.39.132/30	10.149.39.133 – 10.149.39.134	10.149.39.135
227	10.149.39.136/30	10.149.39.137 – 10.149.39.138	10.149.39.139
228	10.149.39.140/30	10.149.39.141 – 10.149.39.142	10.149.39.143
229	10.149.39.144/30	10.149.39.145 – 10.149.39.146	10.149.39.147
230	10.149.39.148/30	10.149.39.149 – 10.149.39.150	10.149.39.151
231	10.149.39.152/30	10.149.39.153 – 10.149.39.154	10.149.39.155
232	10.149.39.156/30	10.149.39.157 – 10.149.39.158	10.149.39.159
233	10.149.39.160/30	10.149.39.161 – 10.149.39.162	10.149.39.163
234	10.149.39.164/30	10.149.39.165 – 10.149.39.166	10.149.39.167
235	10.149.39.168/30	10.149.39.169 – 10.149.39.170	10.149.39.171
236	10.149.39.172/30	10.149.39.173 – 10.149.39.174	10.149.39.175
237	10.149.39.176/30	10.149.39.177 – 10.149.39.178	10.149.39.179
238	10.149.39.180/30	10.149.39.181 – 10.149.39.182	10.149.39.183
239	10.149.39.184/30	10.149.39.185 – 10.149.39.186	10.149.39.187
240	10.149.39.188/30	10.149.39.189 – 10.149.39.190	10.149.39.191
241	10.149.39.192/30	10.149.39.193 – 10.149.39.194	10.149.39.195
242	10.149.39.196/30	10.149.39.197 – 10.149.39.198	10.149.39.199
243	10.149.39.200/30	10.149.39.201 – 10.149.39.202	10.149.39.203
244	10.149.39.204/30	10.149.39.205 – 10.149.39.206	10.149.39.207
245	10.149.39.208/30	10.149.39.209 – 10.149.39.210	10.149.39.211
246	10.149.39.212/30	10.149.39.213 – 10.149.39.214	10.149.39.215
247	10.149.39.216/30	10.149.39.217 – 10.149.39.218	10.149.39.219
248	10.149.39.220/30	10.149.39.221 – 10.149.39.222	10.149.39.223
249	10.149.39.224/30	10.149.39.225 – 10.149.39.226	10.149.39.227
250	10.149.39.228/30	10.149.39.229 – 10.149.39.230	10.149.39.231
251	10.149.39.232/30	10.149.39.233 – 10.149.39.234	10.149.39.235
252	10.149.39.236/30	10.149.39.237 – 10.149.39.238	10.149.39.239
253	10.149.39.240/30	10.149.39.241 – 10.149.39.242	10.149.39.243
254	10.149.39.244/30	10.149.39.245 – 10.149.39.246	10.149.39.247
255	10.149.39.248/30	10.149.39.249 – 10.149.39.250	10.149.39.251
256	10.149.39.252/30	10.149.39.253 – 10.149.39.254	10.149.39.255

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 →