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)10.91.8.0/22

network10.91.8.0/22

broadcast10.91.11.255

first host10.91.8.1

last host10.91.11.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.91.8.0/22

address00001010.01011011.00001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01011011.00001000.00000000

broadcast00001010.01011011.00001011.11111111

green = network part, grey = host part

hex0x0a5b0800

decimal173737984

reverse dns0.8.91.10.in-addr.arpa

ipv4-mapped::ffff:a5b:800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.91.8.0/30	10.91.8.1 – 10.91.8.2	10.91.8.3
2	10.91.8.4/30	10.91.8.5 – 10.91.8.6	10.91.8.7
3	10.91.8.8/30	10.91.8.9 – 10.91.8.10	10.91.8.11
4	10.91.8.12/30	10.91.8.13 – 10.91.8.14	10.91.8.15
5	10.91.8.16/30	10.91.8.17 – 10.91.8.18	10.91.8.19
6	10.91.8.20/30	10.91.8.21 – 10.91.8.22	10.91.8.23
7	10.91.8.24/30	10.91.8.25 – 10.91.8.26	10.91.8.27
8	10.91.8.28/30	10.91.8.29 – 10.91.8.30	10.91.8.31
9	10.91.8.32/30	10.91.8.33 – 10.91.8.34	10.91.8.35
10	10.91.8.36/30	10.91.8.37 – 10.91.8.38	10.91.8.39
11	10.91.8.40/30	10.91.8.41 – 10.91.8.42	10.91.8.43
12	10.91.8.44/30	10.91.8.45 – 10.91.8.46	10.91.8.47
13	10.91.8.48/30	10.91.8.49 – 10.91.8.50	10.91.8.51
14	10.91.8.52/30	10.91.8.53 – 10.91.8.54	10.91.8.55
15	10.91.8.56/30	10.91.8.57 – 10.91.8.58	10.91.8.59
16	10.91.8.60/30	10.91.8.61 – 10.91.8.62	10.91.8.63
17	10.91.8.64/30	10.91.8.65 – 10.91.8.66	10.91.8.67
18	10.91.8.68/30	10.91.8.69 – 10.91.8.70	10.91.8.71
19	10.91.8.72/30	10.91.8.73 – 10.91.8.74	10.91.8.75
20	10.91.8.76/30	10.91.8.77 – 10.91.8.78	10.91.8.79
21	10.91.8.80/30	10.91.8.81 – 10.91.8.82	10.91.8.83
22	10.91.8.84/30	10.91.8.85 – 10.91.8.86	10.91.8.87
23	10.91.8.88/30	10.91.8.89 – 10.91.8.90	10.91.8.91
24	10.91.8.92/30	10.91.8.93 – 10.91.8.94	10.91.8.95
25	10.91.8.96/30	10.91.8.97 – 10.91.8.98	10.91.8.99
26	10.91.8.100/30	10.91.8.101 – 10.91.8.102	10.91.8.103
27	10.91.8.104/30	10.91.8.105 – 10.91.8.106	10.91.8.107
28	10.91.8.108/30	10.91.8.109 – 10.91.8.110	10.91.8.111
29	10.91.8.112/30	10.91.8.113 – 10.91.8.114	10.91.8.115
30	10.91.8.116/30	10.91.8.117 – 10.91.8.118	10.91.8.119
31	10.91.8.120/30	10.91.8.121 – 10.91.8.122	10.91.8.123
32	10.91.8.124/30	10.91.8.125 – 10.91.8.126	10.91.8.127
33	10.91.8.128/30	10.91.8.129 – 10.91.8.130	10.91.8.131
34	10.91.8.132/30	10.91.8.133 – 10.91.8.134	10.91.8.135
35	10.91.8.136/30	10.91.8.137 – 10.91.8.138	10.91.8.139
36	10.91.8.140/30	10.91.8.141 – 10.91.8.142	10.91.8.143
37	10.91.8.144/30	10.91.8.145 – 10.91.8.146	10.91.8.147
38	10.91.8.148/30	10.91.8.149 – 10.91.8.150	10.91.8.151
39	10.91.8.152/30	10.91.8.153 – 10.91.8.154	10.91.8.155
40	10.91.8.156/30	10.91.8.157 – 10.91.8.158	10.91.8.159
41	10.91.8.160/30	10.91.8.161 – 10.91.8.162	10.91.8.163
42	10.91.8.164/30	10.91.8.165 – 10.91.8.166	10.91.8.167
43	10.91.8.168/30	10.91.8.169 – 10.91.8.170	10.91.8.171
44	10.91.8.172/30	10.91.8.173 – 10.91.8.174	10.91.8.175
45	10.91.8.176/30	10.91.8.177 – 10.91.8.178	10.91.8.179
46	10.91.8.180/30	10.91.8.181 – 10.91.8.182	10.91.8.183
47	10.91.8.184/30	10.91.8.185 – 10.91.8.186	10.91.8.187
48	10.91.8.188/30	10.91.8.189 – 10.91.8.190	10.91.8.191
49	10.91.8.192/30	10.91.8.193 – 10.91.8.194	10.91.8.195
50	10.91.8.196/30	10.91.8.197 – 10.91.8.198	10.91.8.199
51	10.91.8.200/30	10.91.8.201 – 10.91.8.202	10.91.8.203
52	10.91.8.204/30	10.91.8.205 – 10.91.8.206	10.91.8.207
53	10.91.8.208/30	10.91.8.209 – 10.91.8.210	10.91.8.211
54	10.91.8.212/30	10.91.8.213 – 10.91.8.214	10.91.8.215
55	10.91.8.216/30	10.91.8.217 – 10.91.8.218	10.91.8.219
56	10.91.8.220/30	10.91.8.221 – 10.91.8.222	10.91.8.223
57	10.91.8.224/30	10.91.8.225 – 10.91.8.226	10.91.8.227
58	10.91.8.228/30	10.91.8.229 – 10.91.8.230	10.91.8.231
59	10.91.8.232/30	10.91.8.233 – 10.91.8.234	10.91.8.235
60	10.91.8.236/30	10.91.8.237 – 10.91.8.238	10.91.8.239
61	10.91.8.240/30	10.91.8.241 – 10.91.8.242	10.91.8.243
62	10.91.8.244/30	10.91.8.245 – 10.91.8.246	10.91.8.247
63	10.91.8.248/30	10.91.8.249 – 10.91.8.250	10.91.8.251
64	10.91.8.252/30	10.91.8.253 – 10.91.8.254	10.91.8.255
65	10.91.9.0/30	10.91.9.1 – 10.91.9.2	10.91.9.3
66	10.91.9.4/30	10.91.9.5 – 10.91.9.6	10.91.9.7
67	10.91.9.8/30	10.91.9.9 – 10.91.9.10	10.91.9.11
68	10.91.9.12/30	10.91.9.13 – 10.91.9.14	10.91.9.15
69	10.91.9.16/30	10.91.9.17 – 10.91.9.18	10.91.9.19
70	10.91.9.20/30	10.91.9.21 – 10.91.9.22	10.91.9.23
71	10.91.9.24/30	10.91.9.25 – 10.91.9.26	10.91.9.27
72	10.91.9.28/30	10.91.9.29 – 10.91.9.30	10.91.9.31
73	10.91.9.32/30	10.91.9.33 – 10.91.9.34	10.91.9.35
74	10.91.9.36/30	10.91.9.37 – 10.91.9.38	10.91.9.39
75	10.91.9.40/30	10.91.9.41 – 10.91.9.42	10.91.9.43
76	10.91.9.44/30	10.91.9.45 – 10.91.9.46	10.91.9.47
77	10.91.9.48/30	10.91.9.49 – 10.91.9.50	10.91.9.51
78	10.91.9.52/30	10.91.9.53 – 10.91.9.54	10.91.9.55
79	10.91.9.56/30	10.91.9.57 – 10.91.9.58	10.91.9.59
80	10.91.9.60/30	10.91.9.61 – 10.91.9.62	10.91.9.63
81	10.91.9.64/30	10.91.9.65 – 10.91.9.66	10.91.9.67
82	10.91.9.68/30	10.91.9.69 – 10.91.9.70	10.91.9.71
83	10.91.9.72/30	10.91.9.73 – 10.91.9.74	10.91.9.75
84	10.91.9.76/30	10.91.9.77 – 10.91.9.78	10.91.9.79
85	10.91.9.80/30	10.91.9.81 – 10.91.9.82	10.91.9.83
86	10.91.9.84/30	10.91.9.85 – 10.91.9.86	10.91.9.87
87	10.91.9.88/30	10.91.9.89 – 10.91.9.90	10.91.9.91
88	10.91.9.92/30	10.91.9.93 – 10.91.9.94	10.91.9.95
89	10.91.9.96/30	10.91.9.97 – 10.91.9.98	10.91.9.99
90	10.91.9.100/30	10.91.9.101 – 10.91.9.102	10.91.9.103
91	10.91.9.104/30	10.91.9.105 – 10.91.9.106	10.91.9.107
92	10.91.9.108/30	10.91.9.109 – 10.91.9.110	10.91.9.111
93	10.91.9.112/30	10.91.9.113 – 10.91.9.114	10.91.9.115
94	10.91.9.116/30	10.91.9.117 – 10.91.9.118	10.91.9.119
95	10.91.9.120/30	10.91.9.121 – 10.91.9.122	10.91.9.123
96	10.91.9.124/30	10.91.9.125 – 10.91.9.126	10.91.9.127
97	10.91.9.128/30	10.91.9.129 – 10.91.9.130	10.91.9.131
98	10.91.9.132/30	10.91.9.133 – 10.91.9.134	10.91.9.135
99	10.91.9.136/30	10.91.9.137 – 10.91.9.138	10.91.9.139
100	10.91.9.140/30	10.91.9.141 – 10.91.9.142	10.91.9.143
101	10.91.9.144/30	10.91.9.145 – 10.91.9.146	10.91.9.147
102	10.91.9.148/30	10.91.9.149 – 10.91.9.150	10.91.9.151
103	10.91.9.152/30	10.91.9.153 – 10.91.9.154	10.91.9.155
104	10.91.9.156/30	10.91.9.157 – 10.91.9.158	10.91.9.159
105	10.91.9.160/30	10.91.9.161 – 10.91.9.162	10.91.9.163
106	10.91.9.164/30	10.91.9.165 – 10.91.9.166	10.91.9.167
107	10.91.9.168/30	10.91.9.169 – 10.91.9.170	10.91.9.171
108	10.91.9.172/30	10.91.9.173 – 10.91.9.174	10.91.9.175
109	10.91.9.176/30	10.91.9.177 – 10.91.9.178	10.91.9.179
110	10.91.9.180/30	10.91.9.181 – 10.91.9.182	10.91.9.183
111	10.91.9.184/30	10.91.9.185 – 10.91.9.186	10.91.9.187
112	10.91.9.188/30	10.91.9.189 – 10.91.9.190	10.91.9.191
113	10.91.9.192/30	10.91.9.193 – 10.91.9.194	10.91.9.195
114	10.91.9.196/30	10.91.9.197 – 10.91.9.198	10.91.9.199
115	10.91.9.200/30	10.91.9.201 – 10.91.9.202	10.91.9.203
116	10.91.9.204/30	10.91.9.205 – 10.91.9.206	10.91.9.207
117	10.91.9.208/30	10.91.9.209 – 10.91.9.210	10.91.9.211
118	10.91.9.212/30	10.91.9.213 – 10.91.9.214	10.91.9.215
119	10.91.9.216/30	10.91.9.217 – 10.91.9.218	10.91.9.219
120	10.91.9.220/30	10.91.9.221 – 10.91.9.222	10.91.9.223
121	10.91.9.224/30	10.91.9.225 – 10.91.9.226	10.91.9.227
122	10.91.9.228/30	10.91.9.229 – 10.91.9.230	10.91.9.231
123	10.91.9.232/30	10.91.9.233 – 10.91.9.234	10.91.9.235
124	10.91.9.236/30	10.91.9.237 – 10.91.9.238	10.91.9.239
125	10.91.9.240/30	10.91.9.241 – 10.91.9.242	10.91.9.243
126	10.91.9.244/30	10.91.9.245 – 10.91.9.246	10.91.9.247
127	10.91.9.248/30	10.91.9.249 – 10.91.9.250	10.91.9.251
128	10.91.9.252/30	10.91.9.253 – 10.91.9.254	10.91.9.255
129	10.91.10.0/30	10.91.10.1 – 10.91.10.2	10.91.10.3
130	10.91.10.4/30	10.91.10.5 – 10.91.10.6	10.91.10.7
131	10.91.10.8/30	10.91.10.9 – 10.91.10.10	10.91.10.11
132	10.91.10.12/30	10.91.10.13 – 10.91.10.14	10.91.10.15
133	10.91.10.16/30	10.91.10.17 – 10.91.10.18	10.91.10.19
134	10.91.10.20/30	10.91.10.21 – 10.91.10.22	10.91.10.23
135	10.91.10.24/30	10.91.10.25 – 10.91.10.26	10.91.10.27
136	10.91.10.28/30	10.91.10.29 – 10.91.10.30	10.91.10.31
137	10.91.10.32/30	10.91.10.33 – 10.91.10.34	10.91.10.35
138	10.91.10.36/30	10.91.10.37 – 10.91.10.38	10.91.10.39
139	10.91.10.40/30	10.91.10.41 – 10.91.10.42	10.91.10.43
140	10.91.10.44/30	10.91.10.45 – 10.91.10.46	10.91.10.47
141	10.91.10.48/30	10.91.10.49 – 10.91.10.50	10.91.10.51
142	10.91.10.52/30	10.91.10.53 – 10.91.10.54	10.91.10.55
143	10.91.10.56/30	10.91.10.57 – 10.91.10.58	10.91.10.59
144	10.91.10.60/30	10.91.10.61 – 10.91.10.62	10.91.10.63
145	10.91.10.64/30	10.91.10.65 – 10.91.10.66	10.91.10.67
146	10.91.10.68/30	10.91.10.69 – 10.91.10.70	10.91.10.71
147	10.91.10.72/30	10.91.10.73 – 10.91.10.74	10.91.10.75
148	10.91.10.76/30	10.91.10.77 – 10.91.10.78	10.91.10.79
149	10.91.10.80/30	10.91.10.81 – 10.91.10.82	10.91.10.83
150	10.91.10.84/30	10.91.10.85 – 10.91.10.86	10.91.10.87
151	10.91.10.88/30	10.91.10.89 – 10.91.10.90	10.91.10.91
152	10.91.10.92/30	10.91.10.93 – 10.91.10.94	10.91.10.95
153	10.91.10.96/30	10.91.10.97 – 10.91.10.98	10.91.10.99
154	10.91.10.100/30	10.91.10.101 – 10.91.10.102	10.91.10.103
155	10.91.10.104/30	10.91.10.105 – 10.91.10.106	10.91.10.107
156	10.91.10.108/30	10.91.10.109 – 10.91.10.110	10.91.10.111
157	10.91.10.112/30	10.91.10.113 – 10.91.10.114	10.91.10.115
158	10.91.10.116/30	10.91.10.117 – 10.91.10.118	10.91.10.119
159	10.91.10.120/30	10.91.10.121 – 10.91.10.122	10.91.10.123
160	10.91.10.124/30	10.91.10.125 – 10.91.10.126	10.91.10.127
161	10.91.10.128/30	10.91.10.129 – 10.91.10.130	10.91.10.131
162	10.91.10.132/30	10.91.10.133 – 10.91.10.134	10.91.10.135
163	10.91.10.136/30	10.91.10.137 – 10.91.10.138	10.91.10.139
164	10.91.10.140/30	10.91.10.141 – 10.91.10.142	10.91.10.143
165	10.91.10.144/30	10.91.10.145 – 10.91.10.146	10.91.10.147
166	10.91.10.148/30	10.91.10.149 – 10.91.10.150	10.91.10.151
167	10.91.10.152/30	10.91.10.153 – 10.91.10.154	10.91.10.155
168	10.91.10.156/30	10.91.10.157 – 10.91.10.158	10.91.10.159
169	10.91.10.160/30	10.91.10.161 – 10.91.10.162	10.91.10.163
170	10.91.10.164/30	10.91.10.165 – 10.91.10.166	10.91.10.167
171	10.91.10.168/30	10.91.10.169 – 10.91.10.170	10.91.10.171
172	10.91.10.172/30	10.91.10.173 – 10.91.10.174	10.91.10.175
173	10.91.10.176/30	10.91.10.177 – 10.91.10.178	10.91.10.179
174	10.91.10.180/30	10.91.10.181 – 10.91.10.182	10.91.10.183
175	10.91.10.184/30	10.91.10.185 – 10.91.10.186	10.91.10.187
176	10.91.10.188/30	10.91.10.189 – 10.91.10.190	10.91.10.191
177	10.91.10.192/30	10.91.10.193 – 10.91.10.194	10.91.10.195
178	10.91.10.196/30	10.91.10.197 – 10.91.10.198	10.91.10.199
179	10.91.10.200/30	10.91.10.201 – 10.91.10.202	10.91.10.203
180	10.91.10.204/30	10.91.10.205 – 10.91.10.206	10.91.10.207
181	10.91.10.208/30	10.91.10.209 – 10.91.10.210	10.91.10.211
182	10.91.10.212/30	10.91.10.213 – 10.91.10.214	10.91.10.215
183	10.91.10.216/30	10.91.10.217 – 10.91.10.218	10.91.10.219
184	10.91.10.220/30	10.91.10.221 – 10.91.10.222	10.91.10.223
185	10.91.10.224/30	10.91.10.225 – 10.91.10.226	10.91.10.227
186	10.91.10.228/30	10.91.10.229 – 10.91.10.230	10.91.10.231
187	10.91.10.232/30	10.91.10.233 – 10.91.10.234	10.91.10.235
188	10.91.10.236/30	10.91.10.237 – 10.91.10.238	10.91.10.239
189	10.91.10.240/30	10.91.10.241 – 10.91.10.242	10.91.10.243
190	10.91.10.244/30	10.91.10.245 – 10.91.10.246	10.91.10.247
191	10.91.10.248/30	10.91.10.249 – 10.91.10.250	10.91.10.251
192	10.91.10.252/30	10.91.10.253 – 10.91.10.254	10.91.10.255
193	10.91.11.0/30	10.91.11.1 – 10.91.11.2	10.91.11.3
194	10.91.11.4/30	10.91.11.5 – 10.91.11.6	10.91.11.7
195	10.91.11.8/30	10.91.11.9 – 10.91.11.10	10.91.11.11
196	10.91.11.12/30	10.91.11.13 – 10.91.11.14	10.91.11.15
197	10.91.11.16/30	10.91.11.17 – 10.91.11.18	10.91.11.19
198	10.91.11.20/30	10.91.11.21 – 10.91.11.22	10.91.11.23
199	10.91.11.24/30	10.91.11.25 – 10.91.11.26	10.91.11.27
200	10.91.11.28/30	10.91.11.29 – 10.91.11.30	10.91.11.31
201	10.91.11.32/30	10.91.11.33 – 10.91.11.34	10.91.11.35
202	10.91.11.36/30	10.91.11.37 – 10.91.11.38	10.91.11.39
203	10.91.11.40/30	10.91.11.41 – 10.91.11.42	10.91.11.43
204	10.91.11.44/30	10.91.11.45 – 10.91.11.46	10.91.11.47
205	10.91.11.48/30	10.91.11.49 – 10.91.11.50	10.91.11.51
206	10.91.11.52/30	10.91.11.53 – 10.91.11.54	10.91.11.55
207	10.91.11.56/30	10.91.11.57 – 10.91.11.58	10.91.11.59
208	10.91.11.60/30	10.91.11.61 – 10.91.11.62	10.91.11.63
209	10.91.11.64/30	10.91.11.65 – 10.91.11.66	10.91.11.67
210	10.91.11.68/30	10.91.11.69 – 10.91.11.70	10.91.11.71
211	10.91.11.72/30	10.91.11.73 – 10.91.11.74	10.91.11.75
212	10.91.11.76/30	10.91.11.77 – 10.91.11.78	10.91.11.79
213	10.91.11.80/30	10.91.11.81 – 10.91.11.82	10.91.11.83
214	10.91.11.84/30	10.91.11.85 – 10.91.11.86	10.91.11.87
215	10.91.11.88/30	10.91.11.89 – 10.91.11.90	10.91.11.91
216	10.91.11.92/30	10.91.11.93 – 10.91.11.94	10.91.11.95
217	10.91.11.96/30	10.91.11.97 – 10.91.11.98	10.91.11.99
218	10.91.11.100/30	10.91.11.101 – 10.91.11.102	10.91.11.103
219	10.91.11.104/30	10.91.11.105 – 10.91.11.106	10.91.11.107
220	10.91.11.108/30	10.91.11.109 – 10.91.11.110	10.91.11.111
221	10.91.11.112/30	10.91.11.113 – 10.91.11.114	10.91.11.115
222	10.91.11.116/30	10.91.11.117 – 10.91.11.118	10.91.11.119
223	10.91.11.120/30	10.91.11.121 – 10.91.11.122	10.91.11.123
224	10.91.11.124/30	10.91.11.125 – 10.91.11.126	10.91.11.127
225	10.91.11.128/30	10.91.11.129 – 10.91.11.130	10.91.11.131
226	10.91.11.132/30	10.91.11.133 – 10.91.11.134	10.91.11.135
227	10.91.11.136/30	10.91.11.137 – 10.91.11.138	10.91.11.139
228	10.91.11.140/30	10.91.11.141 – 10.91.11.142	10.91.11.143
229	10.91.11.144/30	10.91.11.145 – 10.91.11.146	10.91.11.147
230	10.91.11.148/30	10.91.11.149 – 10.91.11.150	10.91.11.151
231	10.91.11.152/30	10.91.11.153 – 10.91.11.154	10.91.11.155
232	10.91.11.156/30	10.91.11.157 – 10.91.11.158	10.91.11.159
233	10.91.11.160/30	10.91.11.161 – 10.91.11.162	10.91.11.163
234	10.91.11.164/30	10.91.11.165 – 10.91.11.166	10.91.11.167
235	10.91.11.168/30	10.91.11.169 – 10.91.11.170	10.91.11.171
236	10.91.11.172/30	10.91.11.173 – 10.91.11.174	10.91.11.175
237	10.91.11.176/30	10.91.11.177 – 10.91.11.178	10.91.11.179
238	10.91.11.180/30	10.91.11.181 – 10.91.11.182	10.91.11.183
239	10.91.11.184/30	10.91.11.185 – 10.91.11.186	10.91.11.187
240	10.91.11.188/30	10.91.11.189 – 10.91.11.190	10.91.11.191
241	10.91.11.192/30	10.91.11.193 – 10.91.11.194	10.91.11.195
242	10.91.11.196/30	10.91.11.197 – 10.91.11.198	10.91.11.199
243	10.91.11.200/30	10.91.11.201 – 10.91.11.202	10.91.11.203
244	10.91.11.204/30	10.91.11.205 – 10.91.11.206	10.91.11.207
245	10.91.11.208/30	10.91.11.209 – 10.91.11.210	10.91.11.211
246	10.91.11.212/30	10.91.11.213 – 10.91.11.214	10.91.11.215
247	10.91.11.216/30	10.91.11.217 – 10.91.11.218	10.91.11.219
248	10.91.11.220/30	10.91.11.221 – 10.91.11.222	10.91.11.223
249	10.91.11.224/30	10.91.11.225 – 10.91.11.226	10.91.11.227
250	10.91.11.228/30	10.91.11.229 – 10.91.11.230	10.91.11.231
251	10.91.11.232/30	10.91.11.233 – 10.91.11.234	10.91.11.235
252	10.91.11.236/30	10.91.11.237 – 10.91.11.238	10.91.11.239
253	10.91.11.240/30	10.91.11.241 – 10.91.11.242	10.91.11.243
254	10.91.11.244/30	10.91.11.245 – 10.91.11.246	10.91.11.247
255	10.91.11.248/30	10.91.11.249 – 10.91.11.250	10.91.11.251
256	10.91.11.252/30	10.91.11.253 – 10.91.11.254	10.91.11.255

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 →