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)10.71.124.0/22

network10.71.124.0/22

broadcast10.71.127.255

first host10.71.124.1

last host10.71.127.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.124.0/22

address00001010.01000111.01111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.01111100.00000000

broadcast00001010.01000111.01111111.11111111

green = network part, grey = host part

hex0x0a477c00

decimal172456960

reverse dns0.124.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:7c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.124.0/30	10.71.124.1 – 10.71.124.2	10.71.124.3
2	10.71.124.4/30	10.71.124.5 – 10.71.124.6	10.71.124.7
3	10.71.124.8/30	10.71.124.9 – 10.71.124.10	10.71.124.11
4	10.71.124.12/30	10.71.124.13 – 10.71.124.14	10.71.124.15
5	10.71.124.16/30	10.71.124.17 – 10.71.124.18	10.71.124.19
6	10.71.124.20/30	10.71.124.21 – 10.71.124.22	10.71.124.23
7	10.71.124.24/30	10.71.124.25 – 10.71.124.26	10.71.124.27
8	10.71.124.28/30	10.71.124.29 – 10.71.124.30	10.71.124.31
9	10.71.124.32/30	10.71.124.33 – 10.71.124.34	10.71.124.35
10	10.71.124.36/30	10.71.124.37 – 10.71.124.38	10.71.124.39
11	10.71.124.40/30	10.71.124.41 – 10.71.124.42	10.71.124.43
12	10.71.124.44/30	10.71.124.45 – 10.71.124.46	10.71.124.47
13	10.71.124.48/30	10.71.124.49 – 10.71.124.50	10.71.124.51
14	10.71.124.52/30	10.71.124.53 – 10.71.124.54	10.71.124.55
15	10.71.124.56/30	10.71.124.57 – 10.71.124.58	10.71.124.59
16	10.71.124.60/30	10.71.124.61 – 10.71.124.62	10.71.124.63
17	10.71.124.64/30	10.71.124.65 – 10.71.124.66	10.71.124.67
18	10.71.124.68/30	10.71.124.69 – 10.71.124.70	10.71.124.71
19	10.71.124.72/30	10.71.124.73 – 10.71.124.74	10.71.124.75
20	10.71.124.76/30	10.71.124.77 – 10.71.124.78	10.71.124.79
21	10.71.124.80/30	10.71.124.81 – 10.71.124.82	10.71.124.83
22	10.71.124.84/30	10.71.124.85 – 10.71.124.86	10.71.124.87
23	10.71.124.88/30	10.71.124.89 – 10.71.124.90	10.71.124.91
24	10.71.124.92/30	10.71.124.93 – 10.71.124.94	10.71.124.95
25	10.71.124.96/30	10.71.124.97 – 10.71.124.98	10.71.124.99
26	10.71.124.100/30	10.71.124.101 – 10.71.124.102	10.71.124.103
27	10.71.124.104/30	10.71.124.105 – 10.71.124.106	10.71.124.107
28	10.71.124.108/30	10.71.124.109 – 10.71.124.110	10.71.124.111
29	10.71.124.112/30	10.71.124.113 – 10.71.124.114	10.71.124.115
30	10.71.124.116/30	10.71.124.117 – 10.71.124.118	10.71.124.119
31	10.71.124.120/30	10.71.124.121 – 10.71.124.122	10.71.124.123
32	10.71.124.124/30	10.71.124.125 – 10.71.124.126	10.71.124.127
33	10.71.124.128/30	10.71.124.129 – 10.71.124.130	10.71.124.131
34	10.71.124.132/30	10.71.124.133 – 10.71.124.134	10.71.124.135
35	10.71.124.136/30	10.71.124.137 – 10.71.124.138	10.71.124.139
36	10.71.124.140/30	10.71.124.141 – 10.71.124.142	10.71.124.143
37	10.71.124.144/30	10.71.124.145 – 10.71.124.146	10.71.124.147
38	10.71.124.148/30	10.71.124.149 – 10.71.124.150	10.71.124.151
39	10.71.124.152/30	10.71.124.153 – 10.71.124.154	10.71.124.155
40	10.71.124.156/30	10.71.124.157 – 10.71.124.158	10.71.124.159
41	10.71.124.160/30	10.71.124.161 – 10.71.124.162	10.71.124.163
42	10.71.124.164/30	10.71.124.165 – 10.71.124.166	10.71.124.167
43	10.71.124.168/30	10.71.124.169 – 10.71.124.170	10.71.124.171
44	10.71.124.172/30	10.71.124.173 – 10.71.124.174	10.71.124.175
45	10.71.124.176/30	10.71.124.177 – 10.71.124.178	10.71.124.179
46	10.71.124.180/30	10.71.124.181 – 10.71.124.182	10.71.124.183
47	10.71.124.184/30	10.71.124.185 – 10.71.124.186	10.71.124.187
48	10.71.124.188/30	10.71.124.189 – 10.71.124.190	10.71.124.191
49	10.71.124.192/30	10.71.124.193 – 10.71.124.194	10.71.124.195
50	10.71.124.196/30	10.71.124.197 – 10.71.124.198	10.71.124.199
51	10.71.124.200/30	10.71.124.201 – 10.71.124.202	10.71.124.203
52	10.71.124.204/30	10.71.124.205 – 10.71.124.206	10.71.124.207
53	10.71.124.208/30	10.71.124.209 – 10.71.124.210	10.71.124.211
54	10.71.124.212/30	10.71.124.213 – 10.71.124.214	10.71.124.215
55	10.71.124.216/30	10.71.124.217 – 10.71.124.218	10.71.124.219
56	10.71.124.220/30	10.71.124.221 – 10.71.124.222	10.71.124.223
57	10.71.124.224/30	10.71.124.225 – 10.71.124.226	10.71.124.227
58	10.71.124.228/30	10.71.124.229 – 10.71.124.230	10.71.124.231
59	10.71.124.232/30	10.71.124.233 – 10.71.124.234	10.71.124.235
60	10.71.124.236/30	10.71.124.237 – 10.71.124.238	10.71.124.239
61	10.71.124.240/30	10.71.124.241 – 10.71.124.242	10.71.124.243
62	10.71.124.244/30	10.71.124.245 – 10.71.124.246	10.71.124.247
63	10.71.124.248/30	10.71.124.249 – 10.71.124.250	10.71.124.251
64	10.71.124.252/30	10.71.124.253 – 10.71.124.254	10.71.124.255
65	10.71.125.0/30	10.71.125.1 – 10.71.125.2	10.71.125.3
66	10.71.125.4/30	10.71.125.5 – 10.71.125.6	10.71.125.7
67	10.71.125.8/30	10.71.125.9 – 10.71.125.10	10.71.125.11
68	10.71.125.12/30	10.71.125.13 – 10.71.125.14	10.71.125.15
69	10.71.125.16/30	10.71.125.17 – 10.71.125.18	10.71.125.19
70	10.71.125.20/30	10.71.125.21 – 10.71.125.22	10.71.125.23
71	10.71.125.24/30	10.71.125.25 – 10.71.125.26	10.71.125.27
72	10.71.125.28/30	10.71.125.29 – 10.71.125.30	10.71.125.31
73	10.71.125.32/30	10.71.125.33 – 10.71.125.34	10.71.125.35
74	10.71.125.36/30	10.71.125.37 – 10.71.125.38	10.71.125.39
75	10.71.125.40/30	10.71.125.41 – 10.71.125.42	10.71.125.43
76	10.71.125.44/30	10.71.125.45 – 10.71.125.46	10.71.125.47
77	10.71.125.48/30	10.71.125.49 – 10.71.125.50	10.71.125.51
78	10.71.125.52/30	10.71.125.53 – 10.71.125.54	10.71.125.55
79	10.71.125.56/30	10.71.125.57 – 10.71.125.58	10.71.125.59
80	10.71.125.60/30	10.71.125.61 – 10.71.125.62	10.71.125.63
81	10.71.125.64/30	10.71.125.65 – 10.71.125.66	10.71.125.67
82	10.71.125.68/30	10.71.125.69 – 10.71.125.70	10.71.125.71
83	10.71.125.72/30	10.71.125.73 – 10.71.125.74	10.71.125.75
84	10.71.125.76/30	10.71.125.77 – 10.71.125.78	10.71.125.79
85	10.71.125.80/30	10.71.125.81 – 10.71.125.82	10.71.125.83
86	10.71.125.84/30	10.71.125.85 – 10.71.125.86	10.71.125.87
87	10.71.125.88/30	10.71.125.89 – 10.71.125.90	10.71.125.91
88	10.71.125.92/30	10.71.125.93 – 10.71.125.94	10.71.125.95
89	10.71.125.96/30	10.71.125.97 – 10.71.125.98	10.71.125.99
90	10.71.125.100/30	10.71.125.101 – 10.71.125.102	10.71.125.103
91	10.71.125.104/30	10.71.125.105 – 10.71.125.106	10.71.125.107
92	10.71.125.108/30	10.71.125.109 – 10.71.125.110	10.71.125.111
93	10.71.125.112/30	10.71.125.113 – 10.71.125.114	10.71.125.115
94	10.71.125.116/30	10.71.125.117 – 10.71.125.118	10.71.125.119
95	10.71.125.120/30	10.71.125.121 – 10.71.125.122	10.71.125.123
96	10.71.125.124/30	10.71.125.125 – 10.71.125.126	10.71.125.127
97	10.71.125.128/30	10.71.125.129 – 10.71.125.130	10.71.125.131
98	10.71.125.132/30	10.71.125.133 – 10.71.125.134	10.71.125.135
99	10.71.125.136/30	10.71.125.137 – 10.71.125.138	10.71.125.139
100	10.71.125.140/30	10.71.125.141 – 10.71.125.142	10.71.125.143
101	10.71.125.144/30	10.71.125.145 – 10.71.125.146	10.71.125.147
102	10.71.125.148/30	10.71.125.149 – 10.71.125.150	10.71.125.151
103	10.71.125.152/30	10.71.125.153 – 10.71.125.154	10.71.125.155
104	10.71.125.156/30	10.71.125.157 – 10.71.125.158	10.71.125.159
105	10.71.125.160/30	10.71.125.161 – 10.71.125.162	10.71.125.163
106	10.71.125.164/30	10.71.125.165 – 10.71.125.166	10.71.125.167
107	10.71.125.168/30	10.71.125.169 – 10.71.125.170	10.71.125.171
108	10.71.125.172/30	10.71.125.173 – 10.71.125.174	10.71.125.175
109	10.71.125.176/30	10.71.125.177 – 10.71.125.178	10.71.125.179
110	10.71.125.180/30	10.71.125.181 – 10.71.125.182	10.71.125.183
111	10.71.125.184/30	10.71.125.185 – 10.71.125.186	10.71.125.187
112	10.71.125.188/30	10.71.125.189 – 10.71.125.190	10.71.125.191
113	10.71.125.192/30	10.71.125.193 – 10.71.125.194	10.71.125.195
114	10.71.125.196/30	10.71.125.197 – 10.71.125.198	10.71.125.199
115	10.71.125.200/30	10.71.125.201 – 10.71.125.202	10.71.125.203
116	10.71.125.204/30	10.71.125.205 – 10.71.125.206	10.71.125.207
117	10.71.125.208/30	10.71.125.209 – 10.71.125.210	10.71.125.211
118	10.71.125.212/30	10.71.125.213 – 10.71.125.214	10.71.125.215
119	10.71.125.216/30	10.71.125.217 – 10.71.125.218	10.71.125.219
120	10.71.125.220/30	10.71.125.221 – 10.71.125.222	10.71.125.223
121	10.71.125.224/30	10.71.125.225 – 10.71.125.226	10.71.125.227
122	10.71.125.228/30	10.71.125.229 – 10.71.125.230	10.71.125.231
123	10.71.125.232/30	10.71.125.233 – 10.71.125.234	10.71.125.235
124	10.71.125.236/30	10.71.125.237 – 10.71.125.238	10.71.125.239
125	10.71.125.240/30	10.71.125.241 – 10.71.125.242	10.71.125.243
126	10.71.125.244/30	10.71.125.245 – 10.71.125.246	10.71.125.247
127	10.71.125.248/30	10.71.125.249 – 10.71.125.250	10.71.125.251
128	10.71.125.252/30	10.71.125.253 – 10.71.125.254	10.71.125.255
129	10.71.126.0/30	10.71.126.1 – 10.71.126.2	10.71.126.3
130	10.71.126.4/30	10.71.126.5 – 10.71.126.6	10.71.126.7
131	10.71.126.8/30	10.71.126.9 – 10.71.126.10	10.71.126.11
132	10.71.126.12/30	10.71.126.13 – 10.71.126.14	10.71.126.15
133	10.71.126.16/30	10.71.126.17 – 10.71.126.18	10.71.126.19
134	10.71.126.20/30	10.71.126.21 – 10.71.126.22	10.71.126.23
135	10.71.126.24/30	10.71.126.25 – 10.71.126.26	10.71.126.27
136	10.71.126.28/30	10.71.126.29 – 10.71.126.30	10.71.126.31
137	10.71.126.32/30	10.71.126.33 – 10.71.126.34	10.71.126.35
138	10.71.126.36/30	10.71.126.37 – 10.71.126.38	10.71.126.39
139	10.71.126.40/30	10.71.126.41 – 10.71.126.42	10.71.126.43
140	10.71.126.44/30	10.71.126.45 – 10.71.126.46	10.71.126.47
141	10.71.126.48/30	10.71.126.49 – 10.71.126.50	10.71.126.51
142	10.71.126.52/30	10.71.126.53 – 10.71.126.54	10.71.126.55
143	10.71.126.56/30	10.71.126.57 – 10.71.126.58	10.71.126.59
144	10.71.126.60/30	10.71.126.61 – 10.71.126.62	10.71.126.63
145	10.71.126.64/30	10.71.126.65 – 10.71.126.66	10.71.126.67
146	10.71.126.68/30	10.71.126.69 – 10.71.126.70	10.71.126.71
147	10.71.126.72/30	10.71.126.73 – 10.71.126.74	10.71.126.75
148	10.71.126.76/30	10.71.126.77 – 10.71.126.78	10.71.126.79
149	10.71.126.80/30	10.71.126.81 – 10.71.126.82	10.71.126.83
150	10.71.126.84/30	10.71.126.85 – 10.71.126.86	10.71.126.87
151	10.71.126.88/30	10.71.126.89 – 10.71.126.90	10.71.126.91
152	10.71.126.92/30	10.71.126.93 – 10.71.126.94	10.71.126.95
153	10.71.126.96/30	10.71.126.97 – 10.71.126.98	10.71.126.99
154	10.71.126.100/30	10.71.126.101 – 10.71.126.102	10.71.126.103
155	10.71.126.104/30	10.71.126.105 – 10.71.126.106	10.71.126.107
156	10.71.126.108/30	10.71.126.109 – 10.71.126.110	10.71.126.111
157	10.71.126.112/30	10.71.126.113 – 10.71.126.114	10.71.126.115
158	10.71.126.116/30	10.71.126.117 – 10.71.126.118	10.71.126.119
159	10.71.126.120/30	10.71.126.121 – 10.71.126.122	10.71.126.123
160	10.71.126.124/30	10.71.126.125 – 10.71.126.126	10.71.126.127
161	10.71.126.128/30	10.71.126.129 – 10.71.126.130	10.71.126.131
162	10.71.126.132/30	10.71.126.133 – 10.71.126.134	10.71.126.135
163	10.71.126.136/30	10.71.126.137 – 10.71.126.138	10.71.126.139
164	10.71.126.140/30	10.71.126.141 – 10.71.126.142	10.71.126.143
165	10.71.126.144/30	10.71.126.145 – 10.71.126.146	10.71.126.147
166	10.71.126.148/30	10.71.126.149 – 10.71.126.150	10.71.126.151
167	10.71.126.152/30	10.71.126.153 – 10.71.126.154	10.71.126.155
168	10.71.126.156/30	10.71.126.157 – 10.71.126.158	10.71.126.159
169	10.71.126.160/30	10.71.126.161 – 10.71.126.162	10.71.126.163
170	10.71.126.164/30	10.71.126.165 – 10.71.126.166	10.71.126.167
171	10.71.126.168/30	10.71.126.169 – 10.71.126.170	10.71.126.171
172	10.71.126.172/30	10.71.126.173 – 10.71.126.174	10.71.126.175
173	10.71.126.176/30	10.71.126.177 – 10.71.126.178	10.71.126.179
174	10.71.126.180/30	10.71.126.181 – 10.71.126.182	10.71.126.183
175	10.71.126.184/30	10.71.126.185 – 10.71.126.186	10.71.126.187
176	10.71.126.188/30	10.71.126.189 – 10.71.126.190	10.71.126.191
177	10.71.126.192/30	10.71.126.193 – 10.71.126.194	10.71.126.195
178	10.71.126.196/30	10.71.126.197 – 10.71.126.198	10.71.126.199
179	10.71.126.200/30	10.71.126.201 – 10.71.126.202	10.71.126.203
180	10.71.126.204/30	10.71.126.205 – 10.71.126.206	10.71.126.207
181	10.71.126.208/30	10.71.126.209 – 10.71.126.210	10.71.126.211
182	10.71.126.212/30	10.71.126.213 – 10.71.126.214	10.71.126.215
183	10.71.126.216/30	10.71.126.217 – 10.71.126.218	10.71.126.219
184	10.71.126.220/30	10.71.126.221 – 10.71.126.222	10.71.126.223
185	10.71.126.224/30	10.71.126.225 – 10.71.126.226	10.71.126.227
186	10.71.126.228/30	10.71.126.229 – 10.71.126.230	10.71.126.231
187	10.71.126.232/30	10.71.126.233 – 10.71.126.234	10.71.126.235
188	10.71.126.236/30	10.71.126.237 – 10.71.126.238	10.71.126.239
189	10.71.126.240/30	10.71.126.241 – 10.71.126.242	10.71.126.243
190	10.71.126.244/30	10.71.126.245 – 10.71.126.246	10.71.126.247
191	10.71.126.248/30	10.71.126.249 – 10.71.126.250	10.71.126.251
192	10.71.126.252/30	10.71.126.253 – 10.71.126.254	10.71.126.255
193	10.71.127.0/30	10.71.127.1 – 10.71.127.2	10.71.127.3
194	10.71.127.4/30	10.71.127.5 – 10.71.127.6	10.71.127.7
195	10.71.127.8/30	10.71.127.9 – 10.71.127.10	10.71.127.11
196	10.71.127.12/30	10.71.127.13 – 10.71.127.14	10.71.127.15
197	10.71.127.16/30	10.71.127.17 – 10.71.127.18	10.71.127.19
198	10.71.127.20/30	10.71.127.21 – 10.71.127.22	10.71.127.23
199	10.71.127.24/30	10.71.127.25 – 10.71.127.26	10.71.127.27
200	10.71.127.28/30	10.71.127.29 – 10.71.127.30	10.71.127.31
201	10.71.127.32/30	10.71.127.33 – 10.71.127.34	10.71.127.35
202	10.71.127.36/30	10.71.127.37 – 10.71.127.38	10.71.127.39
203	10.71.127.40/30	10.71.127.41 – 10.71.127.42	10.71.127.43
204	10.71.127.44/30	10.71.127.45 – 10.71.127.46	10.71.127.47
205	10.71.127.48/30	10.71.127.49 – 10.71.127.50	10.71.127.51
206	10.71.127.52/30	10.71.127.53 – 10.71.127.54	10.71.127.55
207	10.71.127.56/30	10.71.127.57 – 10.71.127.58	10.71.127.59
208	10.71.127.60/30	10.71.127.61 – 10.71.127.62	10.71.127.63
209	10.71.127.64/30	10.71.127.65 – 10.71.127.66	10.71.127.67
210	10.71.127.68/30	10.71.127.69 – 10.71.127.70	10.71.127.71
211	10.71.127.72/30	10.71.127.73 – 10.71.127.74	10.71.127.75
212	10.71.127.76/30	10.71.127.77 – 10.71.127.78	10.71.127.79
213	10.71.127.80/30	10.71.127.81 – 10.71.127.82	10.71.127.83
214	10.71.127.84/30	10.71.127.85 – 10.71.127.86	10.71.127.87
215	10.71.127.88/30	10.71.127.89 – 10.71.127.90	10.71.127.91
216	10.71.127.92/30	10.71.127.93 – 10.71.127.94	10.71.127.95
217	10.71.127.96/30	10.71.127.97 – 10.71.127.98	10.71.127.99
218	10.71.127.100/30	10.71.127.101 – 10.71.127.102	10.71.127.103
219	10.71.127.104/30	10.71.127.105 – 10.71.127.106	10.71.127.107
220	10.71.127.108/30	10.71.127.109 – 10.71.127.110	10.71.127.111
221	10.71.127.112/30	10.71.127.113 – 10.71.127.114	10.71.127.115
222	10.71.127.116/30	10.71.127.117 – 10.71.127.118	10.71.127.119
223	10.71.127.120/30	10.71.127.121 – 10.71.127.122	10.71.127.123
224	10.71.127.124/30	10.71.127.125 – 10.71.127.126	10.71.127.127
225	10.71.127.128/30	10.71.127.129 – 10.71.127.130	10.71.127.131
226	10.71.127.132/30	10.71.127.133 – 10.71.127.134	10.71.127.135
227	10.71.127.136/30	10.71.127.137 – 10.71.127.138	10.71.127.139
228	10.71.127.140/30	10.71.127.141 – 10.71.127.142	10.71.127.143
229	10.71.127.144/30	10.71.127.145 – 10.71.127.146	10.71.127.147
230	10.71.127.148/30	10.71.127.149 – 10.71.127.150	10.71.127.151
231	10.71.127.152/30	10.71.127.153 – 10.71.127.154	10.71.127.155
232	10.71.127.156/30	10.71.127.157 – 10.71.127.158	10.71.127.159
233	10.71.127.160/30	10.71.127.161 – 10.71.127.162	10.71.127.163
234	10.71.127.164/30	10.71.127.165 – 10.71.127.166	10.71.127.167
235	10.71.127.168/30	10.71.127.169 – 10.71.127.170	10.71.127.171
236	10.71.127.172/30	10.71.127.173 – 10.71.127.174	10.71.127.175
237	10.71.127.176/30	10.71.127.177 – 10.71.127.178	10.71.127.179
238	10.71.127.180/30	10.71.127.181 – 10.71.127.182	10.71.127.183
239	10.71.127.184/30	10.71.127.185 – 10.71.127.186	10.71.127.187
240	10.71.127.188/30	10.71.127.189 – 10.71.127.190	10.71.127.191
241	10.71.127.192/30	10.71.127.193 – 10.71.127.194	10.71.127.195
242	10.71.127.196/30	10.71.127.197 – 10.71.127.198	10.71.127.199
243	10.71.127.200/30	10.71.127.201 – 10.71.127.202	10.71.127.203
244	10.71.127.204/30	10.71.127.205 – 10.71.127.206	10.71.127.207
245	10.71.127.208/30	10.71.127.209 – 10.71.127.210	10.71.127.211
246	10.71.127.212/30	10.71.127.213 – 10.71.127.214	10.71.127.215
247	10.71.127.216/30	10.71.127.217 – 10.71.127.218	10.71.127.219
248	10.71.127.220/30	10.71.127.221 – 10.71.127.222	10.71.127.223
249	10.71.127.224/30	10.71.127.225 – 10.71.127.226	10.71.127.227
250	10.71.127.228/30	10.71.127.229 – 10.71.127.230	10.71.127.231
251	10.71.127.232/30	10.71.127.233 – 10.71.127.234	10.71.127.235
252	10.71.127.236/30	10.71.127.237 – 10.71.127.238	10.71.127.239
253	10.71.127.240/30	10.71.127.241 – 10.71.127.242	10.71.127.243
254	10.71.127.244/30	10.71.127.245 – 10.71.127.246	10.71.127.247
255	10.71.127.248/30	10.71.127.249 – 10.71.127.250	10.71.127.251
256	10.71.127.252/30	10.71.127.253 – 10.71.127.254	10.71.127.255

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 →