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)10.71.252.0/22

network10.71.252.0/22

broadcast10.71.255.255

first host10.71.252.1

last host10.71.255.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.252.0/22

address00001010.01000111.11111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.11111100.00000000

broadcast00001010.01000111.11111111.11111111

green = network part, grey = host part

hex0x0a47fc00

decimal172489728

reverse dns0.252.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:fc00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.252.0/30	10.71.252.1 – 10.71.252.2	10.71.252.3
2	10.71.252.4/30	10.71.252.5 – 10.71.252.6	10.71.252.7
3	10.71.252.8/30	10.71.252.9 – 10.71.252.10	10.71.252.11
4	10.71.252.12/30	10.71.252.13 – 10.71.252.14	10.71.252.15
5	10.71.252.16/30	10.71.252.17 – 10.71.252.18	10.71.252.19
6	10.71.252.20/30	10.71.252.21 – 10.71.252.22	10.71.252.23
7	10.71.252.24/30	10.71.252.25 – 10.71.252.26	10.71.252.27
8	10.71.252.28/30	10.71.252.29 – 10.71.252.30	10.71.252.31
9	10.71.252.32/30	10.71.252.33 – 10.71.252.34	10.71.252.35
10	10.71.252.36/30	10.71.252.37 – 10.71.252.38	10.71.252.39
11	10.71.252.40/30	10.71.252.41 – 10.71.252.42	10.71.252.43
12	10.71.252.44/30	10.71.252.45 – 10.71.252.46	10.71.252.47
13	10.71.252.48/30	10.71.252.49 – 10.71.252.50	10.71.252.51
14	10.71.252.52/30	10.71.252.53 – 10.71.252.54	10.71.252.55
15	10.71.252.56/30	10.71.252.57 – 10.71.252.58	10.71.252.59
16	10.71.252.60/30	10.71.252.61 – 10.71.252.62	10.71.252.63
17	10.71.252.64/30	10.71.252.65 – 10.71.252.66	10.71.252.67
18	10.71.252.68/30	10.71.252.69 – 10.71.252.70	10.71.252.71
19	10.71.252.72/30	10.71.252.73 – 10.71.252.74	10.71.252.75
20	10.71.252.76/30	10.71.252.77 – 10.71.252.78	10.71.252.79
21	10.71.252.80/30	10.71.252.81 – 10.71.252.82	10.71.252.83
22	10.71.252.84/30	10.71.252.85 – 10.71.252.86	10.71.252.87
23	10.71.252.88/30	10.71.252.89 – 10.71.252.90	10.71.252.91
24	10.71.252.92/30	10.71.252.93 – 10.71.252.94	10.71.252.95
25	10.71.252.96/30	10.71.252.97 – 10.71.252.98	10.71.252.99
26	10.71.252.100/30	10.71.252.101 – 10.71.252.102	10.71.252.103
27	10.71.252.104/30	10.71.252.105 – 10.71.252.106	10.71.252.107
28	10.71.252.108/30	10.71.252.109 – 10.71.252.110	10.71.252.111
29	10.71.252.112/30	10.71.252.113 – 10.71.252.114	10.71.252.115
30	10.71.252.116/30	10.71.252.117 – 10.71.252.118	10.71.252.119
31	10.71.252.120/30	10.71.252.121 – 10.71.252.122	10.71.252.123
32	10.71.252.124/30	10.71.252.125 – 10.71.252.126	10.71.252.127
33	10.71.252.128/30	10.71.252.129 – 10.71.252.130	10.71.252.131
34	10.71.252.132/30	10.71.252.133 – 10.71.252.134	10.71.252.135
35	10.71.252.136/30	10.71.252.137 – 10.71.252.138	10.71.252.139
36	10.71.252.140/30	10.71.252.141 – 10.71.252.142	10.71.252.143
37	10.71.252.144/30	10.71.252.145 – 10.71.252.146	10.71.252.147
38	10.71.252.148/30	10.71.252.149 – 10.71.252.150	10.71.252.151
39	10.71.252.152/30	10.71.252.153 – 10.71.252.154	10.71.252.155
40	10.71.252.156/30	10.71.252.157 – 10.71.252.158	10.71.252.159
41	10.71.252.160/30	10.71.252.161 – 10.71.252.162	10.71.252.163
42	10.71.252.164/30	10.71.252.165 – 10.71.252.166	10.71.252.167
43	10.71.252.168/30	10.71.252.169 – 10.71.252.170	10.71.252.171
44	10.71.252.172/30	10.71.252.173 – 10.71.252.174	10.71.252.175
45	10.71.252.176/30	10.71.252.177 – 10.71.252.178	10.71.252.179
46	10.71.252.180/30	10.71.252.181 – 10.71.252.182	10.71.252.183
47	10.71.252.184/30	10.71.252.185 – 10.71.252.186	10.71.252.187
48	10.71.252.188/30	10.71.252.189 – 10.71.252.190	10.71.252.191
49	10.71.252.192/30	10.71.252.193 – 10.71.252.194	10.71.252.195
50	10.71.252.196/30	10.71.252.197 – 10.71.252.198	10.71.252.199
51	10.71.252.200/30	10.71.252.201 – 10.71.252.202	10.71.252.203
52	10.71.252.204/30	10.71.252.205 – 10.71.252.206	10.71.252.207
53	10.71.252.208/30	10.71.252.209 – 10.71.252.210	10.71.252.211
54	10.71.252.212/30	10.71.252.213 – 10.71.252.214	10.71.252.215
55	10.71.252.216/30	10.71.252.217 – 10.71.252.218	10.71.252.219
56	10.71.252.220/30	10.71.252.221 – 10.71.252.222	10.71.252.223
57	10.71.252.224/30	10.71.252.225 – 10.71.252.226	10.71.252.227
58	10.71.252.228/30	10.71.252.229 – 10.71.252.230	10.71.252.231
59	10.71.252.232/30	10.71.252.233 – 10.71.252.234	10.71.252.235
60	10.71.252.236/30	10.71.252.237 – 10.71.252.238	10.71.252.239
61	10.71.252.240/30	10.71.252.241 – 10.71.252.242	10.71.252.243
62	10.71.252.244/30	10.71.252.245 – 10.71.252.246	10.71.252.247
63	10.71.252.248/30	10.71.252.249 – 10.71.252.250	10.71.252.251
64	10.71.252.252/30	10.71.252.253 – 10.71.252.254	10.71.252.255
65	10.71.253.0/30	10.71.253.1 – 10.71.253.2	10.71.253.3
66	10.71.253.4/30	10.71.253.5 – 10.71.253.6	10.71.253.7
67	10.71.253.8/30	10.71.253.9 – 10.71.253.10	10.71.253.11
68	10.71.253.12/30	10.71.253.13 – 10.71.253.14	10.71.253.15
69	10.71.253.16/30	10.71.253.17 – 10.71.253.18	10.71.253.19
70	10.71.253.20/30	10.71.253.21 – 10.71.253.22	10.71.253.23
71	10.71.253.24/30	10.71.253.25 – 10.71.253.26	10.71.253.27
72	10.71.253.28/30	10.71.253.29 – 10.71.253.30	10.71.253.31
73	10.71.253.32/30	10.71.253.33 – 10.71.253.34	10.71.253.35
74	10.71.253.36/30	10.71.253.37 – 10.71.253.38	10.71.253.39
75	10.71.253.40/30	10.71.253.41 – 10.71.253.42	10.71.253.43
76	10.71.253.44/30	10.71.253.45 – 10.71.253.46	10.71.253.47
77	10.71.253.48/30	10.71.253.49 – 10.71.253.50	10.71.253.51
78	10.71.253.52/30	10.71.253.53 – 10.71.253.54	10.71.253.55
79	10.71.253.56/30	10.71.253.57 – 10.71.253.58	10.71.253.59
80	10.71.253.60/30	10.71.253.61 – 10.71.253.62	10.71.253.63
81	10.71.253.64/30	10.71.253.65 – 10.71.253.66	10.71.253.67
82	10.71.253.68/30	10.71.253.69 – 10.71.253.70	10.71.253.71
83	10.71.253.72/30	10.71.253.73 – 10.71.253.74	10.71.253.75
84	10.71.253.76/30	10.71.253.77 – 10.71.253.78	10.71.253.79
85	10.71.253.80/30	10.71.253.81 – 10.71.253.82	10.71.253.83
86	10.71.253.84/30	10.71.253.85 – 10.71.253.86	10.71.253.87
87	10.71.253.88/30	10.71.253.89 – 10.71.253.90	10.71.253.91
88	10.71.253.92/30	10.71.253.93 – 10.71.253.94	10.71.253.95
89	10.71.253.96/30	10.71.253.97 – 10.71.253.98	10.71.253.99
90	10.71.253.100/30	10.71.253.101 – 10.71.253.102	10.71.253.103
91	10.71.253.104/30	10.71.253.105 – 10.71.253.106	10.71.253.107
92	10.71.253.108/30	10.71.253.109 – 10.71.253.110	10.71.253.111
93	10.71.253.112/30	10.71.253.113 – 10.71.253.114	10.71.253.115
94	10.71.253.116/30	10.71.253.117 – 10.71.253.118	10.71.253.119
95	10.71.253.120/30	10.71.253.121 – 10.71.253.122	10.71.253.123
96	10.71.253.124/30	10.71.253.125 – 10.71.253.126	10.71.253.127
97	10.71.253.128/30	10.71.253.129 – 10.71.253.130	10.71.253.131
98	10.71.253.132/30	10.71.253.133 – 10.71.253.134	10.71.253.135
99	10.71.253.136/30	10.71.253.137 – 10.71.253.138	10.71.253.139
100	10.71.253.140/30	10.71.253.141 – 10.71.253.142	10.71.253.143
101	10.71.253.144/30	10.71.253.145 – 10.71.253.146	10.71.253.147
102	10.71.253.148/30	10.71.253.149 – 10.71.253.150	10.71.253.151
103	10.71.253.152/30	10.71.253.153 – 10.71.253.154	10.71.253.155
104	10.71.253.156/30	10.71.253.157 – 10.71.253.158	10.71.253.159
105	10.71.253.160/30	10.71.253.161 – 10.71.253.162	10.71.253.163
106	10.71.253.164/30	10.71.253.165 – 10.71.253.166	10.71.253.167
107	10.71.253.168/30	10.71.253.169 – 10.71.253.170	10.71.253.171
108	10.71.253.172/30	10.71.253.173 – 10.71.253.174	10.71.253.175
109	10.71.253.176/30	10.71.253.177 – 10.71.253.178	10.71.253.179
110	10.71.253.180/30	10.71.253.181 – 10.71.253.182	10.71.253.183
111	10.71.253.184/30	10.71.253.185 – 10.71.253.186	10.71.253.187
112	10.71.253.188/30	10.71.253.189 – 10.71.253.190	10.71.253.191
113	10.71.253.192/30	10.71.253.193 – 10.71.253.194	10.71.253.195
114	10.71.253.196/30	10.71.253.197 – 10.71.253.198	10.71.253.199
115	10.71.253.200/30	10.71.253.201 – 10.71.253.202	10.71.253.203
116	10.71.253.204/30	10.71.253.205 – 10.71.253.206	10.71.253.207
117	10.71.253.208/30	10.71.253.209 – 10.71.253.210	10.71.253.211
118	10.71.253.212/30	10.71.253.213 – 10.71.253.214	10.71.253.215
119	10.71.253.216/30	10.71.253.217 – 10.71.253.218	10.71.253.219
120	10.71.253.220/30	10.71.253.221 – 10.71.253.222	10.71.253.223
121	10.71.253.224/30	10.71.253.225 – 10.71.253.226	10.71.253.227
122	10.71.253.228/30	10.71.253.229 – 10.71.253.230	10.71.253.231
123	10.71.253.232/30	10.71.253.233 – 10.71.253.234	10.71.253.235
124	10.71.253.236/30	10.71.253.237 – 10.71.253.238	10.71.253.239
125	10.71.253.240/30	10.71.253.241 – 10.71.253.242	10.71.253.243
126	10.71.253.244/30	10.71.253.245 – 10.71.253.246	10.71.253.247
127	10.71.253.248/30	10.71.253.249 – 10.71.253.250	10.71.253.251
128	10.71.253.252/30	10.71.253.253 – 10.71.253.254	10.71.253.255
129	10.71.254.0/30	10.71.254.1 – 10.71.254.2	10.71.254.3
130	10.71.254.4/30	10.71.254.5 – 10.71.254.6	10.71.254.7
131	10.71.254.8/30	10.71.254.9 – 10.71.254.10	10.71.254.11
132	10.71.254.12/30	10.71.254.13 – 10.71.254.14	10.71.254.15
133	10.71.254.16/30	10.71.254.17 – 10.71.254.18	10.71.254.19
134	10.71.254.20/30	10.71.254.21 – 10.71.254.22	10.71.254.23
135	10.71.254.24/30	10.71.254.25 – 10.71.254.26	10.71.254.27
136	10.71.254.28/30	10.71.254.29 – 10.71.254.30	10.71.254.31
137	10.71.254.32/30	10.71.254.33 – 10.71.254.34	10.71.254.35
138	10.71.254.36/30	10.71.254.37 – 10.71.254.38	10.71.254.39
139	10.71.254.40/30	10.71.254.41 – 10.71.254.42	10.71.254.43
140	10.71.254.44/30	10.71.254.45 – 10.71.254.46	10.71.254.47
141	10.71.254.48/30	10.71.254.49 – 10.71.254.50	10.71.254.51
142	10.71.254.52/30	10.71.254.53 – 10.71.254.54	10.71.254.55
143	10.71.254.56/30	10.71.254.57 – 10.71.254.58	10.71.254.59
144	10.71.254.60/30	10.71.254.61 – 10.71.254.62	10.71.254.63
145	10.71.254.64/30	10.71.254.65 – 10.71.254.66	10.71.254.67
146	10.71.254.68/30	10.71.254.69 – 10.71.254.70	10.71.254.71
147	10.71.254.72/30	10.71.254.73 – 10.71.254.74	10.71.254.75
148	10.71.254.76/30	10.71.254.77 – 10.71.254.78	10.71.254.79
149	10.71.254.80/30	10.71.254.81 – 10.71.254.82	10.71.254.83
150	10.71.254.84/30	10.71.254.85 – 10.71.254.86	10.71.254.87
151	10.71.254.88/30	10.71.254.89 – 10.71.254.90	10.71.254.91
152	10.71.254.92/30	10.71.254.93 – 10.71.254.94	10.71.254.95
153	10.71.254.96/30	10.71.254.97 – 10.71.254.98	10.71.254.99
154	10.71.254.100/30	10.71.254.101 – 10.71.254.102	10.71.254.103
155	10.71.254.104/30	10.71.254.105 – 10.71.254.106	10.71.254.107
156	10.71.254.108/30	10.71.254.109 – 10.71.254.110	10.71.254.111
157	10.71.254.112/30	10.71.254.113 – 10.71.254.114	10.71.254.115
158	10.71.254.116/30	10.71.254.117 – 10.71.254.118	10.71.254.119
159	10.71.254.120/30	10.71.254.121 – 10.71.254.122	10.71.254.123
160	10.71.254.124/30	10.71.254.125 – 10.71.254.126	10.71.254.127
161	10.71.254.128/30	10.71.254.129 – 10.71.254.130	10.71.254.131
162	10.71.254.132/30	10.71.254.133 – 10.71.254.134	10.71.254.135
163	10.71.254.136/30	10.71.254.137 – 10.71.254.138	10.71.254.139
164	10.71.254.140/30	10.71.254.141 – 10.71.254.142	10.71.254.143
165	10.71.254.144/30	10.71.254.145 – 10.71.254.146	10.71.254.147
166	10.71.254.148/30	10.71.254.149 – 10.71.254.150	10.71.254.151
167	10.71.254.152/30	10.71.254.153 – 10.71.254.154	10.71.254.155
168	10.71.254.156/30	10.71.254.157 – 10.71.254.158	10.71.254.159
169	10.71.254.160/30	10.71.254.161 – 10.71.254.162	10.71.254.163
170	10.71.254.164/30	10.71.254.165 – 10.71.254.166	10.71.254.167
171	10.71.254.168/30	10.71.254.169 – 10.71.254.170	10.71.254.171
172	10.71.254.172/30	10.71.254.173 – 10.71.254.174	10.71.254.175
173	10.71.254.176/30	10.71.254.177 – 10.71.254.178	10.71.254.179
174	10.71.254.180/30	10.71.254.181 – 10.71.254.182	10.71.254.183
175	10.71.254.184/30	10.71.254.185 – 10.71.254.186	10.71.254.187
176	10.71.254.188/30	10.71.254.189 – 10.71.254.190	10.71.254.191
177	10.71.254.192/30	10.71.254.193 – 10.71.254.194	10.71.254.195
178	10.71.254.196/30	10.71.254.197 – 10.71.254.198	10.71.254.199
179	10.71.254.200/30	10.71.254.201 – 10.71.254.202	10.71.254.203
180	10.71.254.204/30	10.71.254.205 – 10.71.254.206	10.71.254.207
181	10.71.254.208/30	10.71.254.209 – 10.71.254.210	10.71.254.211
182	10.71.254.212/30	10.71.254.213 – 10.71.254.214	10.71.254.215
183	10.71.254.216/30	10.71.254.217 – 10.71.254.218	10.71.254.219
184	10.71.254.220/30	10.71.254.221 – 10.71.254.222	10.71.254.223
185	10.71.254.224/30	10.71.254.225 – 10.71.254.226	10.71.254.227
186	10.71.254.228/30	10.71.254.229 – 10.71.254.230	10.71.254.231
187	10.71.254.232/30	10.71.254.233 – 10.71.254.234	10.71.254.235
188	10.71.254.236/30	10.71.254.237 – 10.71.254.238	10.71.254.239
189	10.71.254.240/30	10.71.254.241 – 10.71.254.242	10.71.254.243
190	10.71.254.244/30	10.71.254.245 – 10.71.254.246	10.71.254.247
191	10.71.254.248/30	10.71.254.249 – 10.71.254.250	10.71.254.251
192	10.71.254.252/30	10.71.254.253 – 10.71.254.254	10.71.254.255
193	10.71.255.0/30	10.71.255.1 – 10.71.255.2	10.71.255.3
194	10.71.255.4/30	10.71.255.5 – 10.71.255.6	10.71.255.7
195	10.71.255.8/30	10.71.255.9 – 10.71.255.10	10.71.255.11
196	10.71.255.12/30	10.71.255.13 – 10.71.255.14	10.71.255.15
197	10.71.255.16/30	10.71.255.17 – 10.71.255.18	10.71.255.19
198	10.71.255.20/30	10.71.255.21 – 10.71.255.22	10.71.255.23
199	10.71.255.24/30	10.71.255.25 – 10.71.255.26	10.71.255.27
200	10.71.255.28/30	10.71.255.29 – 10.71.255.30	10.71.255.31
201	10.71.255.32/30	10.71.255.33 – 10.71.255.34	10.71.255.35
202	10.71.255.36/30	10.71.255.37 – 10.71.255.38	10.71.255.39
203	10.71.255.40/30	10.71.255.41 – 10.71.255.42	10.71.255.43
204	10.71.255.44/30	10.71.255.45 – 10.71.255.46	10.71.255.47
205	10.71.255.48/30	10.71.255.49 – 10.71.255.50	10.71.255.51
206	10.71.255.52/30	10.71.255.53 – 10.71.255.54	10.71.255.55
207	10.71.255.56/30	10.71.255.57 – 10.71.255.58	10.71.255.59
208	10.71.255.60/30	10.71.255.61 – 10.71.255.62	10.71.255.63
209	10.71.255.64/30	10.71.255.65 – 10.71.255.66	10.71.255.67
210	10.71.255.68/30	10.71.255.69 – 10.71.255.70	10.71.255.71
211	10.71.255.72/30	10.71.255.73 – 10.71.255.74	10.71.255.75
212	10.71.255.76/30	10.71.255.77 – 10.71.255.78	10.71.255.79
213	10.71.255.80/30	10.71.255.81 – 10.71.255.82	10.71.255.83
214	10.71.255.84/30	10.71.255.85 – 10.71.255.86	10.71.255.87
215	10.71.255.88/30	10.71.255.89 – 10.71.255.90	10.71.255.91
216	10.71.255.92/30	10.71.255.93 – 10.71.255.94	10.71.255.95
217	10.71.255.96/30	10.71.255.97 – 10.71.255.98	10.71.255.99
218	10.71.255.100/30	10.71.255.101 – 10.71.255.102	10.71.255.103
219	10.71.255.104/30	10.71.255.105 – 10.71.255.106	10.71.255.107
220	10.71.255.108/30	10.71.255.109 – 10.71.255.110	10.71.255.111
221	10.71.255.112/30	10.71.255.113 – 10.71.255.114	10.71.255.115
222	10.71.255.116/30	10.71.255.117 – 10.71.255.118	10.71.255.119
223	10.71.255.120/30	10.71.255.121 – 10.71.255.122	10.71.255.123
224	10.71.255.124/30	10.71.255.125 – 10.71.255.126	10.71.255.127
225	10.71.255.128/30	10.71.255.129 – 10.71.255.130	10.71.255.131
226	10.71.255.132/30	10.71.255.133 – 10.71.255.134	10.71.255.135
227	10.71.255.136/30	10.71.255.137 – 10.71.255.138	10.71.255.139
228	10.71.255.140/30	10.71.255.141 – 10.71.255.142	10.71.255.143
229	10.71.255.144/30	10.71.255.145 – 10.71.255.146	10.71.255.147
230	10.71.255.148/30	10.71.255.149 – 10.71.255.150	10.71.255.151
231	10.71.255.152/30	10.71.255.153 – 10.71.255.154	10.71.255.155
232	10.71.255.156/30	10.71.255.157 – 10.71.255.158	10.71.255.159
233	10.71.255.160/30	10.71.255.161 – 10.71.255.162	10.71.255.163
234	10.71.255.164/30	10.71.255.165 – 10.71.255.166	10.71.255.167
235	10.71.255.168/30	10.71.255.169 – 10.71.255.170	10.71.255.171
236	10.71.255.172/30	10.71.255.173 – 10.71.255.174	10.71.255.175
237	10.71.255.176/30	10.71.255.177 – 10.71.255.178	10.71.255.179
238	10.71.255.180/30	10.71.255.181 – 10.71.255.182	10.71.255.183
239	10.71.255.184/30	10.71.255.185 – 10.71.255.186	10.71.255.187
240	10.71.255.188/30	10.71.255.189 – 10.71.255.190	10.71.255.191
241	10.71.255.192/30	10.71.255.193 – 10.71.255.194	10.71.255.195
242	10.71.255.196/30	10.71.255.197 – 10.71.255.198	10.71.255.199
243	10.71.255.200/30	10.71.255.201 – 10.71.255.202	10.71.255.203
244	10.71.255.204/30	10.71.255.205 – 10.71.255.206	10.71.255.207
245	10.71.255.208/30	10.71.255.209 – 10.71.255.210	10.71.255.211
246	10.71.255.212/30	10.71.255.213 – 10.71.255.214	10.71.255.215
247	10.71.255.216/30	10.71.255.217 – 10.71.255.218	10.71.255.219
248	10.71.255.220/30	10.71.255.221 – 10.71.255.222	10.71.255.223
249	10.71.255.224/30	10.71.255.225 – 10.71.255.226	10.71.255.227
250	10.71.255.228/30	10.71.255.229 – 10.71.255.230	10.71.255.231
251	10.71.255.232/30	10.71.255.233 – 10.71.255.234	10.71.255.235
252	10.71.255.236/30	10.71.255.237 – 10.71.255.238	10.71.255.239
253	10.71.255.240/30	10.71.255.241 – 10.71.255.242	10.71.255.243
254	10.71.255.244/30	10.71.255.245 – 10.71.255.246	10.71.255.247
255	10.71.255.248/30	10.71.255.249 – 10.71.255.250	10.71.255.251
256	10.71.255.252/30	10.71.255.253 – 10.71.255.254	10.71.255.255

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 →