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)10.37.8.0/22

network10.37.8.0/22

broadcast10.37.11.255

first host10.37.8.1

last host10.37.11.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.37.8.0/22

address00001010.00100101.00001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00100101.00001000.00000000

broadcast00001010.00100101.00001011.11111111

green = network part, grey = host part

hex0x0a250800

decimal170199040

reverse dns0.8.37.10.in-addr.arpa

ipv4-mapped::ffff:a25:800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.37.8.0/30	10.37.8.1 – 10.37.8.2	10.37.8.3
2	10.37.8.4/30	10.37.8.5 – 10.37.8.6	10.37.8.7
3	10.37.8.8/30	10.37.8.9 – 10.37.8.10	10.37.8.11
4	10.37.8.12/30	10.37.8.13 – 10.37.8.14	10.37.8.15
5	10.37.8.16/30	10.37.8.17 – 10.37.8.18	10.37.8.19
6	10.37.8.20/30	10.37.8.21 – 10.37.8.22	10.37.8.23
7	10.37.8.24/30	10.37.8.25 – 10.37.8.26	10.37.8.27
8	10.37.8.28/30	10.37.8.29 – 10.37.8.30	10.37.8.31
9	10.37.8.32/30	10.37.8.33 – 10.37.8.34	10.37.8.35
10	10.37.8.36/30	10.37.8.37 – 10.37.8.38	10.37.8.39
11	10.37.8.40/30	10.37.8.41 – 10.37.8.42	10.37.8.43
12	10.37.8.44/30	10.37.8.45 – 10.37.8.46	10.37.8.47
13	10.37.8.48/30	10.37.8.49 – 10.37.8.50	10.37.8.51
14	10.37.8.52/30	10.37.8.53 – 10.37.8.54	10.37.8.55
15	10.37.8.56/30	10.37.8.57 – 10.37.8.58	10.37.8.59
16	10.37.8.60/30	10.37.8.61 – 10.37.8.62	10.37.8.63
17	10.37.8.64/30	10.37.8.65 – 10.37.8.66	10.37.8.67
18	10.37.8.68/30	10.37.8.69 – 10.37.8.70	10.37.8.71
19	10.37.8.72/30	10.37.8.73 – 10.37.8.74	10.37.8.75
20	10.37.8.76/30	10.37.8.77 – 10.37.8.78	10.37.8.79
21	10.37.8.80/30	10.37.8.81 – 10.37.8.82	10.37.8.83
22	10.37.8.84/30	10.37.8.85 – 10.37.8.86	10.37.8.87
23	10.37.8.88/30	10.37.8.89 – 10.37.8.90	10.37.8.91
24	10.37.8.92/30	10.37.8.93 – 10.37.8.94	10.37.8.95
25	10.37.8.96/30	10.37.8.97 – 10.37.8.98	10.37.8.99
26	10.37.8.100/30	10.37.8.101 – 10.37.8.102	10.37.8.103
27	10.37.8.104/30	10.37.8.105 – 10.37.8.106	10.37.8.107
28	10.37.8.108/30	10.37.8.109 – 10.37.8.110	10.37.8.111
29	10.37.8.112/30	10.37.8.113 – 10.37.8.114	10.37.8.115
30	10.37.8.116/30	10.37.8.117 – 10.37.8.118	10.37.8.119
31	10.37.8.120/30	10.37.8.121 – 10.37.8.122	10.37.8.123
32	10.37.8.124/30	10.37.8.125 – 10.37.8.126	10.37.8.127
33	10.37.8.128/30	10.37.8.129 – 10.37.8.130	10.37.8.131
34	10.37.8.132/30	10.37.8.133 – 10.37.8.134	10.37.8.135
35	10.37.8.136/30	10.37.8.137 – 10.37.8.138	10.37.8.139
36	10.37.8.140/30	10.37.8.141 – 10.37.8.142	10.37.8.143
37	10.37.8.144/30	10.37.8.145 – 10.37.8.146	10.37.8.147
38	10.37.8.148/30	10.37.8.149 – 10.37.8.150	10.37.8.151
39	10.37.8.152/30	10.37.8.153 – 10.37.8.154	10.37.8.155
40	10.37.8.156/30	10.37.8.157 – 10.37.8.158	10.37.8.159
41	10.37.8.160/30	10.37.8.161 – 10.37.8.162	10.37.8.163
42	10.37.8.164/30	10.37.8.165 – 10.37.8.166	10.37.8.167
43	10.37.8.168/30	10.37.8.169 – 10.37.8.170	10.37.8.171
44	10.37.8.172/30	10.37.8.173 – 10.37.8.174	10.37.8.175
45	10.37.8.176/30	10.37.8.177 – 10.37.8.178	10.37.8.179
46	10.37.8.180/30	10.37.8.181 – 10.37.8.182	10.37.8.183
47	10.37.8.184/30	10.37.8.185 – 10.37.8.186	10.37.8.187
48	10.37.8.188/30	10.37.8.189 – 10.37.8.190	10.37.8.191
49	10.37.8.192/30	10.37.8.193 – 10.37.8.194	10.37.8.195
50	10.37.8.196/30	10.37.8.197 – 10.37.8.198	10.37.8.199
51	10.37.8.200/30	10.37.8.201 – 10.37.8.202	10.37.8.203
52	10.37.8.204/30	10.37.8.205 – 10.37.8.206	10.37.8.207
53	10.37.8.208/30	10.37.8.209 – 10.37.8.210	10.37.8.211
54	10.37.8.212/30	10.37.8.213 – 10.37.8.214	10.37.8.215
55	10.37.8.216/30	10.37.8.217 – 10.37.8.218	10.37.8.219
56	10.37.8.220/30	10.37.8.221 – 10.37.8.222	10.37.8.223
57	10.37.8.224/30	10.37.8.225 – 10.37.8.226	10.37.8.227
58	10.37.8.228/30	10.37.8.229 – 10.37.8.230	10.37.8.231
59	10.37.8.232/30	10.37.8.233 – 10.37.8.234	10.37.8.235
60	10.37.8.236/30	10.37.8.237 – 10.37.8.238	10.37.8.239
61	10.37.8.240/30	10.37.8.241 – 10.37.8.242	10.37.8.243
62	10.37.8.244/30	10.37.8.245 – 10.37.8.246	10.37.8.247
63	10.37.8.248/30	10.37.8.249 – 10.37.8.250	10.37.8.251
64	10.37.8.252/30	10.37.8.253 – 10.37.8.254	10.37.8.255
65	10.37.9.0/30	10.37.9.1 – 10.37.9.2	10.37.9.3
66	10.37.9.4/30	10.37.9.5 – 10.37.9.6	10.37.9.7
67	10.37.9.8/30	10.37.9.9 – 10.37.9.10	10.37.9.11
68	10.37.9.12/30	10.37.9.13 – 10.37.9.14	10.37.9.15
69	10.37.9.16/30	10.37.9.17 – 10.37.9.18	10.37.9.19
70	10.37.9.20/30	10.37.9.21 – 10.37.9.22	10.37.9.23
71	10.37.9.24/30	10.37.9.25 – 10.37.9.26	10.37.9.27
72	10.37.9.28/30	10.37.9.29 – 10.37.9.30	10.37.9.31
73	10.37.9.32/30	10.37.9.33 – 10.37.9.34	10.37.9.35
74	10.37.9.36/30	10.37.9.37 – 10.37.9.38	10.37.9.39
75	10.37.9.40/30	10.37.9.41 – 10.37.9.42	10.37.9.43
76	10.37.9.44/30	10.37.9.45 – 10.37.9.46	10.37.9.47
77	10.37.9.48/30	10.37.9.49 – 10.37.9.50	10.37.9.51
78	10.37.9.52/30	10.37.9.53 – 10.37.9.54	10.37.9.55
79	10.37.9.56/30	10.37.9.57 – 10.37.9.58	10.37.9.59
80	10.37.9.60/30	10.37.9.61 – 10.37.9.62	10.37.9.63
81	10.37.9.64/30	10.37.9.65 – 10.37.9.66	10.37.9.67
82	10.37.9.68/30	10.37.9.69 – 10.37.9.70	10.37.9.71
83	10.37.9.72/30	10.37.9.73 – 10.37.9.74	10.37.9.75
84	10.37.9.76/30	10.37.9.77 – 10.37.9.78	10.37.9.79
85	10.37.9.80/30	10.37.9.81 – 10.37.9.82	10.37.9.83
86	10.37.9.84/30	10.37.9.85 – 10.37.9.86	10.37.9.87
87	10.37.9.88/30	10.37.9.89 – 10.37.9.90	10.37.9.91
88	10.37.9.92/30	10.37.9.93 – 10.37.9.94	10.37.9.95
89	10.37.9.96/30	10.37.9.97 – 10.37.9.98	10.37.9.99
90	10.37.9.100/30	10.37.9.101 – 10.37.9.102	10.37.9.103
91	10.37.9.104/30	10.37.9.105 – 10.37.9.106	10.37.9.107
92	10.37.9.108/30	10.37.9.109 – 10.37.9.110	10.37.9.111
93	10.37.9.112/30	10.37.9.113 – 10.37.9.114	10.37.9.115
94	10.37.9.116/30	10.37.9.117 – 10.37.9.118	10.37.9.119
95	10.37.9.120/30	10.37.9.121 – 10.37.9.122	10.37.9.123
96	10.37.9.124/30	10.37.9.125 – 10.37.9.126	10.37.9.127
97	10.37.9.128/30	10.37.9.129 – 10.37.9.130	10.37.9.131
98	10.37.9.132/30	10.37.9.133 – 10.37.9.134	10.37.9.135
99	10.37.9.136/30	10.37.9.137 – 10.37.9.138	10.37.9.139
100	10.37.9.140/30	10.37.9.141 – 10.37.9.142	10.37.9.143
101	10.37.9.144/30	10.37.9.145 – 10.37.9.146	10.37.9.147
102	10.37.9.148/30	10.37.9.149 – 10.37.9.150	10.37.9.151
103	10.37.9.152/30	10.37.9.153 – 10.37.9.154	10.37.9.155
104	10.37.9.156/30	10.37.9.157 – 10.37.9.158	10.37.9.159
105	10.37.9.160/30	10.37.9.161 – 10.37.9.162	10.37.9.163
106	10.37.9.164/30	10.37.9.165 – 10.37.9.166	10.37.9.167
107	10.37.9.168/30	10.37.9.169 – 10.37.9.170	10.37.9.171
108	10.37.9.172/30	10.37.9.173 – 10.37.9.174	10.37.9.175
109	10.37.9.176/30	10.37.9.177 – 10.37.9.178	10.37.9.179
110	10.37.9.180/30	10.37.9.181 – 10.37.9.182	10.37.9.183
111	10.37.9.184/30	10.37.9.185 – 10.37.9.186	10.37.9.187
112	10.37.9.188/30	10.37.9.189 – 10.37.9.190	10.37.9.191
113	10.37.9.192/30	10.37.9.193 – 10.37.9.194	10.37.9.195
114	10.37.9.196/30	10.37.9.197 – 10.37.9.198	10.37.9.199
115	10.37.9.200/30	10.37.9.201 – 10.37.9.202	10.37.9.203
116	10.37.9.204/30	10.37.9.205 – 10.37.9.206	10.37.9.207
117	10.37.9.208/30	10.37.9.209 – 10.37.9.210	10.37.9.211
118	10.37.9.212/30	10.37.9.213 – 10.37.9.214	10.37.9.215
119	10.37.9.216/30	10.37.9.217 – 10.37.9.218	10.37.9.219
120	10.37.9.220/30	10.37.9.221 – 10.37.9.222	10.37.9.223
121	10.37.9.224/30	10.37.9.225 – 10.37.9.226	10.37.9.227
122	10.37.9.228/30	10.37.9.229 – 10.37.9.230	10.37.9.231
123	10.37.9.232/30	10.37.9.233 – 10.37.9.234	10.37.9.235
124	10.37.9.236/30	10.37.9.237 – 10.37.9.238	10.37.9.239
125	10.37.9.240/30	10.37.9.241 – 10.37.9.242	10.37.9.243
126	10.37.9.244/30	10.37.9.245 – 10.37.9.246	10.37.9.247
127	10.37.9.248/30	10.37.9.249 – 10.37.9.250	10.37.9.251
128	10.37.9.252/30	10.37.9.253 – 10.37.9.254	10.37.9.255
129	10.37.10.0/30	10.37.10.1 – 10.37.10.2	10.37.10.3
130	10.37.10.4/30	10.37.10.5 – 10.37.10.6	10.37.10.7
131	10.37.10.8/30	10.37.10.9 – 10.37.10.10	10.37.10.11
132	10.37.10.12/30	10.37.10.13 – 10.37.10.14	10.37.10.15
133	10.37.10.16/30	10.37.10.17 – 10.37.10.18	10.37.10.19
134	10.37.10.20/30	10.37.10.21 – 10.37.10.22	10.37.10.23
135	10.37.10.24/30	10.37.10.25 – 10.37.10.26	10.37.10.27
136	10.37.10.28/30	10.37.10.29 – 10.37.10.30	10.37.10.31
137	10.37.10.32/30	10.37.10.33 – 10.37.10.34	10.37.10.35
138	10.37.10.36/30	10.37.10.37 – 10.37.10.38	10.37.10.39
139	10.37.10.40/30	10.37.10.41 – 10.37.10.42	10.37.10.43
140	10.37.10.44/30	10.37.10.45 – 10.37.10.46	10.37.10.47
141	10.37.10.48/30	10.37.10.49 – 10.37.10.50	10.37.10.51
142	10.37.10.52/30	10.37.10.53 – 10.37.10.54	10.37.10.55
143	10.37.10.56/30	10.37.10.57 – 10.37.10.58	10.37.10.59
144	10.37.10.60/30	10.37.10.61 – 10.37.10.62	10.37.10.63
145	10.37.10.64/30	10.37.10.65 – 10.37.10.66	10.37.10.67
146	10.37.10.68/30	10.37.10.69 – 10.37.10.70	10.37.10.71
147	10.37.10.72/30	10.37.10.73 – 10.37.10.74	10.37.10.75
148	10.37.10.76/30	10.37.10.77 – 10.37.10.78	10.37.10.79
149	10.37.10.80/30	10.37.10.81 – 10.37.10.82	10.37.10.83
150	10.37.10.84/30	10.37.10.85 – 10.37.10.86	10.37.10.87
151	10.37.10.88/30	10.37.10.89 – 10.37.10.90	10.37.10.91
152	10.37.10.92/30	10.37.10.93 – 10.37.10.94	10.37.10.95
153	10.37.10.96/30	10.37.10.97 – 10.37.10.98	10.37.10.99
154	10.37.10.100/30	10.37.10.101 – 10.37.10.102	10.37.10.103
155	10.37.10.104/30	10.37.10.105 – 10.37.10.106	10.37.10.107
156	10.37.10.108/30	10.37.10.109 – 10.37.10.110	10.37.10.111
157	10.37.10.112/30	10.37.10.113 – 10.37.10.114	10.37.10.115
158	10.37.10.116/30	10.37.10.117 – 10.37.10.118	10.37.10.119
159	10.37.10.120/30	10.37.10.121 – 10.37.10.122	10.37.10.123
160	10.37.10.124/30	10.37.10.125 – 10.37.10.126	10.37.10.127
161	10.37.10.128/30	10.37.10.129 – 10.37.10.130	10.37.10.131
162	10.37.10.132/30	10.37.10.133 – 10.37.10.134	10.37.10.135
163	10.37.10.136/30	10.37.10.137 – 10.37.10.138	10.37.10.139
164	10.37.10.140/30	10.37.10.141 – 10.37.10.142	10.37.10.143
165	10.37.10.144/30	10.37.10.145 – 10.37.10.146	10.37.10.147
166	10.37.10.148/30	10.37.10.149 – 10.37.10.150	10.37.10.151
167	10.37.10.152/30	10.37.10.153 – 10.37.10.154	10.37.10.155
168	10.37.10.156/30	10.37.10.157 – 10.37.10.158	10.37.10.159
169	10.37.10.160/30	10.37.10.161 – 10.37.10.162	10.37.10.163
170	10.37.10.164/30	10.37.10.165 – 10.37.10.166	10.37.10.167
171	10.37.10.168/30	10.37.10.169 – 10.37.10.170	10.37.10.171
172	10.37.10.172/30	10.37.10.173 – 10.37.10.174	10.37.10.175
173	10.37.10.176/30	10.37.10.177 – 10.37.10.178	10.37.10.179
174	10.37.10.180/30	10.37.10.181 – 10.37.10.182	10.37.10.183
175	10.37.10.184/30	10.37.10.185 – 10.37.10.186	10.37.10.187
176	10.37.10.188/30	10.37.10.189 – 10.37.10.190	10.37.10.191
177	10.37.10.192/30	10.37.10.193 – 10.37.10.194	10.37.10.195
178	10.37.10.196/30	10.37.10.197 – 10.37.10.198	10.37.10.199
179	10.37.10.200/30	10.37.10.201 – 10.37.10.202	10.37.10.203
180	10.37.10.204/30	10.37.10.205 – 10.37.10.206	10.37.10.207
181	10.37.10.208/30	10.37.10.209 – 10.37.10.210	10.37.10.211
182	10.37.10.212/30	10.37.10.213 – 10.37.10.214	10.37.10.215
183	10.37.10.216/30	10.37.10.217 – 10.37.10.218	10.37.10.219
184	10.37.10.220/30	10.37.10.221 – 10.37.10.222	10.37.10.223
185	10.37.10.224/30	10.37.10.225 – 10.37.10.226	10.37.10.227
186	10.37.10.228/30	10.37.10.229 – 10.37.10.230	10.37.10.231
187	10.37.10.232/30	10.37.10.233 – 10.37.10.234	10.37.10.235
188	10.37.10.236/30	10.37.10.237 – 10.37.10.238	10.37.10.239
189	10.37.10.240/30	10.37.10.241 – 10.37.10.242	10.37.10.243
190	10.37.10.244/30	10.37.10.245 – 10.37.10.246	10.37.10.247
191	10.37.10.248/30	10.37.10.249 – 10.37.10.250	10.37.10.251
192	10.37.10.252/30	10.37.10.253 – 10.37.10.254	10.37.10.255
193	10.37.11.0/30	10.37.11.1 – 10.37.11.2	10.37.11.3
194	10.37.11.4/30	10.37.11.5 – 10.37.11.6	10.37.11.7
195	10.37.11.8/30	10.37.11.9 – 10.37.11.10	10.37.11.11
196	10.37.11.12/30	10.37.11.13 – 10.37.11.14	10.37.11.15
197	10.37.11.16/30	10.37.11.17 – 10.37.11.18	10.37.11.19
198	10.37.11.20/30	10.37.11.21 – 10.37.11.22	10.37.11.23
199	10.37.11.24/30	10.37.11.25 – 10.37.11.26	10.37.11.27
200	10.37.11.28/30	10.37.11.29 – 10.37.11.30	10.37.11.31
201	10.37.11.32/30	10.37.11.33 – 10.37.11.34	10.37.11.35
202	10.37.11.36/30	10.37.11.37 – 10.37.11.38	10.37.11.39
203	10.37.11.40/30	10.37.11.41 – 10.37.11.42	10.37.11.43
204	10.37.11.44/30	10.37.11.45 – 10.37.11.46	10.37.11.47
205	10.37.11.48/30	10.37.11.49 – 10.37.11.50	10.37.11.51
206	10.37.11.52/30	10.37.11.53 – 10.37.11.54	10.37.11.55
207	10.37.11.56/30	10.37.11.57 – 10.37.11.58	10.37.11.59
208	10.37.11.60/30	10.37.11.61 – 10.37.11.62	10.37.11.63
209	10.37.11.64/30	10.37.11.65 – 10.37.11.66	10.37.11.67
210	10.37.11.68/30	10.37.11.69 – 10.37.11.70	10.37.11.71
211	10.37.11.72/30	10.37.11.73 – 10.37.11.74	10.37.11.75
212	10.37.11.76/30	10.37.11.77 – 10.37.11.78	10.37.11.79
213	10.37.11.80/30	10.37.11.81 – 10.37.11.82	10.37.11.83
214	10.37.11.84/30	10.37.11.85 – 10.37.11.86	10.37.11.87
215	10.37.11.88/30	10.37.11.89 – 10.37.11.90	10.37.11.91
216	10.37.11.92/30	10.37.11.93 – 10.37.11.94	10.37.11.95
217	10.37.11.96/30	10.37.11.97 – 10.37.11.98	10.37.11.99
218	10.37.11.100/30	10.37.11.101 – 10.37.11.102	10.37.11.103
219	10.37.11.104/30	10.37.11.105 – 10.37.11.106	10.37.11.107
220	10.37.11.108/30	10.37.11.109 – 10.37.11.110	10.37.11.111
221	10.37.11.112/30	10.37.11.113 – 10.37.11.114	10.37.11.115
222	10.37.11.116/30	10.37.11.117 – 10.37.11.118	10.37.11.119
223	10.37.11.120/30	10.37.11.121 – 10.37.11.122	10.37.11.123
224	10.37.11.124/30	10.37.11.125 – 10.37.11.126	10.37.11.127
225	10.37.11.128/30	10.37.11.129 – 10.37.11.130	10.37.11.131
226	10.37.11.132/30	10.37.11.133 – 10.37.11.134	10.37.11.135
227	10.37.11.136/30	10.37.11.137 – 10.37.11.138	10.37.11.139
228	10.37.11.140/30	10.37.11.141 – 10.37.11.142	10.37.11.143
229	10.37.11.144/30	10.37.11.145 – 10.37.11.146	10.37.11.147
230	10.37.11.148/30	10.37.11.149 – 10.37.11.150	10.37.11.151
231	10.37.11.152/30	10.37.11.153 – 10.37.11.154	10.37.11.155
232	10.37.11.156/30	10.37.11.157 – 10.37.11.158	10.37.11.159
233	10.37.11.160/30	10.37.11.161 – 10.37.11.162	10.37.11.163
234	10.37.11.164/30	10.37.11.165 – 10.37.11.166	10.37.11.167
235	10.37.11.168/30	10.37.11.169 – 10.37.11.170	10.37.11.171
236	10.37.11.172/30	10.37.11.173 – 10.37.11.174	10.37.11.175
237	10.37.11.176/30	10.37.11.177 – 10.37.11.178	10.37.11.179
238	10.37.11.180/30	10.37.11.181 – 10.37.11.182	10.37.11.183
239	10.37.11.184/30	10.37.11.185 – 10.37.11.186	10.37.11.187
240	10.37.11.188/30	10.37.11.189 – 10.37.11.190	10.37.11.191
241	10.37.11.192/30	10.37.11.193 – 10.37.11.194	10.37.11.195
242	10.37.11.196/30	10.37.11.197 – 10.37.11.198	10.37.11.199
243	10.37.11.200/30	10.37.11.201 – 10.37.11.202	10.37.11.203
244	10.37.11.204/30	10.37.11.205 – 10.37.11.206	10.37.11.207
245	10.37.11.208/30	10.37.11.209 – 10.37.11.210	10.37.11.211
246	10.37.11.212/30	10.37.11.213 – 10.37.11.214	10.37.11.215
247	10.37.11.216/30	10.37.11.217 – 10.37.11.218	10.37.11.219
248	10.37.11.220/30	10.37.11.221 – 10.37.11.222	10.37.11.223
249	10.37.11.224/30	10.37.11.225 – 10.37.11.226	10.37.11.227
250	10.37.11.228/30	10.37.11.229 – 10.37.11.230	10.37.11.231
251	10.37.11.232/30	10.37.11.233 – 10.37.11.234	10.37.11.235
252	10.37.11.236/30	10.37.11.237 – 10.37.11.238	10.37.11.239
253	10.37.11.240/30	10.37.11.241 – 10.37.11.242	10.37.11.243
254	10.37.11.244/30	10.37.11.245 – 10.37.11.246	10.37.11.247
255	10.37.11.248/30	10.37.11.249 – 10.37.11.250	10.37.11.251
256	10.37.11.252/30	10.37.11.253 – 10.37.11.254	10.37.11.255

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 →