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)10.2.180.0/22

network10.2.180.0/22

broadcast10.2.183.255

first host10.2.180.1

last host10.2.183.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.180.0/22

address00001010.00000010.10110100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10110100.00000000

broadcast00001010.00000010.10110111.11111111

green = network part, grey = host part

hex0x0a02b400

decimal167949312

reverse dns0.180.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:b400

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.180.0/30	10.2.180.1 – 10.2.180.2	10.2.180.3
2	10.2.180.4/30	10.2.180.5 – 10.2.180.6	10.2.180.7
3	10.2.180.8/30	10.2.180.9 – 10.2.180.10	10.2.180.11
4	10.2.180.12/30	10.2.180.13 – 10.2.180.14	10.2.180.15
5	10.2.180.16/30	10.2.180.17 – 10.2.180.18	10.2.180.19
6	10.2.180.20/30	10.2.180.21 – 10.2.180.22	10.2.180.23
7	10.2.180.24/30	10.2.180.25 – 10.2.180.26	10.2.180.27
8	10.2.180.28/30	10.2.180.29 – 10.2.180.30	10.2.180.31
9	10.2.180.32/30	10.2.180.33 – 10.2.180.34	10.2.180.35
10	10.2.180.36/30	10.2.180.37 – 10.2.180.38	10.2.180.39
11	10.2.180.40/30	10.2.180.41 – 10.2.180.42	10.2.180.43
12	10.2.180.44/30	10.2.180.45 – 10.2.180.46	10.2.180.47
13	10.2.180.48/30	10.2.180.49 – 10.2.180.50	10.2.180.51
14	10.2.180.52/30	10.2.180.53 – 10.2.180.54	10.2.180.55
15	10.2.180.56/30	10.2.180.57 – 10.2.180.58	10.2.180.59
16	10.2.180.60/30	10.2.180.61 – 10.2.180.62	10.2.180.63
17	10.2.180.64/30	10.2.180.65 – 10.2.180.66	10.2.180.67
18	10.2.180.68/30	10.2.180.69 – 10.2.180.70	10.2.180.71
19	10.2.180.72/30	10.2.180.73 – 10.2.180.74	10.2.180.75
20	10.2.180.76/30	10.2.180.77 – 10.2.180.78	10.2.180.79
21	10.2.180.80/30	10.2.180.81 – 10.2.180.82	10.2.180.83
22	10.2.180.84/30	10.2.180.85 – 10.2.180.86	10.2.180.87
23	10.2.180.88/30	10.2.180.89 – 10.2.180.90	10.2.180.91
24	10.2.180.92/30	10.2.180.93 – 10.2.180.94	10.2.180.95
25	10.2.180.96/30	10.2.180.97 – 10.2.180.98	10.2.180.99
26	10.2.180.100/30	10.2.180.101 – 10.2.180.102	10.2.180.103
27	10.2.180.104/30	10.2.180.105 – 10.2.180.106	10.2.180.107
28	10.2.180.108/30	10.2.180.109 – 10.2.180.110	10.2.180.111
29	10.2.180.112/30	10.2.180.113 – 10.2.180.114	10.2.180.115
30	10.2.180.116/30	10.2.180.117 – 10.2.180.118	10.2.180.119
31	10.2.180.120/30	10.2.180.121 – 10.2.180.122	10.2.180.123
32	10.2.180.124/30	10.2.180.125 – 10.2.180.126	10.2.180.127
33	10.2.180.128/30	10.2.180.129 – 10.2.180.130	10.2.180.131
34	10.2.180.132/30	10.2.180.133 – 10.2.180.134	10.2.180.135
35	10.2.180.136/30	10.2.180.137 – 10.2.180.138	10.2.180.139
36	10.2.180.140/30	10.2.180.141 – 10.2.180.142	10.2.180.143
37	10.2.180.144/30	10.2.180.145 – 10.2.180.146	10.2.180.147
38	10.2.180.148/30	10.2.180.149 – 10.2.180.150	10.2.180.151
39	10.2.180.152/30	10.2.180.153 – 10.2.180.154	10.2.180.155
40	10.2.180.156/30	10.2.180.157 – 10.2.180.158	10.2.180.159
41	10.2.180.160/30	10.2.180.161 – 10.2.180.162	10.2.180.163
42	10.2.180.164/30	10.2.180.165 – 10.2.180.166	10.2.180.167
43	10.2.180.168/30	10.2.180.169 – 10.2.180.170	10.2.180.171
44	10.2.180.172/30	10.2.180.173 – 10.2.180.174	10.2.180.175
45	10.2.180.176/30	10.2.180.177 – 10.2.180.178	10.2.180.179
46	10.2.180.180/30	10.2.180.181 – 10.2.180.182	10.2.180.183
47	10.2.180.184/30	10.2.180.185 – 10.2.180.186	10.2.180.187
48	10.2.180.188/30	10.2.180.189 – 10.2.180.190	10.2.180.191
49	10.2.180.192/30	10.2.180.193 – 10.2.180.194	10.2.180.195
50	10.2.180.196/30	10.2.180.197 – 10.2.180.198	10.2.180.199
51	10.2.180.200/30	10.2.180.201 – 10.2.180.202	10.2.180.203
52	10.2.180.204/30	10.2.180.205 – 10.2.180.206	10.2.180.207
53	10.2.180.208/30	10.2.180.209 – 10.2.180.210	10.2.180.211
54	10.2.180.212/30	10.2.180.213 – 10.2.180.214	10.2.180.215
55	10.2.180.216/30	10.2.180.217 – 10.2.180.218	10.2.180.219
56	10.2.180.220/30	10.2.180.221 – 10.2.180.222	10.2.180.223
57	10.2.180.224/30	10.2.180.225 – 10.2.180.226	10.2.180.227
58	10.2.180.228/30	10.2.180.229 – 10.2.180.230	10.2.180.231
59	10.2.180.232/30	10.2.180.233 – 10.2.180.234	10.2.180.235
60	10.2.180.236/30	10.2.180.237 – 10.2.180.238	10.2.180.239
61	10.2.180.240/30	10.2.180.241 – 10.2.180.242	10.2.180.243
62	10.2.180.244/30	10.2.180.245 – 10.2.180.246	10.2.180.247
63	10.2.180.248/30	10.2.180.249 – 10.2.180.250	10.2.180.251
64	10.2.180.252/30	10.2.180.253 – 10.2.180.254	10.2.180.255
65	10.2.181.0/30	10.2.181.1 – 10.2.181.2	10.2.181.3
66	10.2.181.4/30	10.2.181.5 – 10.2.181.6	10.2.181.7
67	10.2.181.8/30	10.2.181.9 – 10.2.181.10	10.2.181.11
68	10.2.181.12/30	10.2.181.13 – 10.2.181.14	10.2.181.15
69	10.2.181.16/30	10.2.181.17 – 10.2.181.18	10.2.181.19
70	10.2.181.20/30	10.2.181.21 – 10.2.181.22	10.2.181.23
71	10.2.181.24/30	10.2.181.25 – 10.2.181.26	10.2.181.27
72	10.2.181.28/30	10.2.181.29 – 10.2.181.30	10.2.181.31
73	10.2.181.32/30	10.2.181.33 – 10.2.181.34	10.2.181.35
74	10.2.181.36/30	10.2.181.37 – 10.2.181.38	10.2.181.39
75	10.2.181.40/30	10.2.181.41 – 10.2.181.42	10.2.181.43
76	10.2.181.44/30	10.2.181.45 – 10.2.181.46	10.2.181.47
77	10.2.181.48/30	10.2.181.49 – 10.2.181.50	10.2.181.51
78	10.2.181.52/30	10.2.181.53 – 10.2.181.54	10.2.181.55
79	10.2.181.56/30	10.2.181.57 – 10.2.181.58	10.2.181.59
80	10.2.181.60/30	10.2.181.61 – 10.2.181.62	10.2.181.63
81	10.2.181.64/30	10.2.181.65 – 10.2.181.66	10.2.181.67
82	10.2.181.68/30	10.2.181.69 – 10.2.181.70	10.2.181.71
83	10.2.181.72/30	10.2.181.73 – 10.2.181.74	10.2.181.75
84	10.2.181.76/30	10.2.181.77 – 10.2.181.78	10.2.181.79
85	10.2.181.80/30	10.2.181.81 – 10.2.181.82	10.2.181.83
86	10.2.181.84/30	10.2.181.85 – 10.2.181.86	10.2.181.87
87	10.2.181.88/30	10.2.181.89 – 10.2.181.90	10.2.181.91
88	10.2.181.92/30	10.2.181.93 – 10.2.181.94	10.2.181.95
89	10.2.181.96/30	10.2.181.97 – 10.2.181.98	10.2.181.99
90	10.2.181.100/30	10.2.181.101 – 10.2.181.102	10.2.181.103
91	10.2.181.104/30	10.2.181.105 – 10.2.181.106	10.2.181.107
92	10.2.181.108/30	10.2.181.109 – 10.2.181.110	10.2.181.111
93	10.2.181.112/30	10.2.181.113 – 10.2.181.114	10.2.181.115
94	10.2.181.116/30	10.2.181.117 – 10.2.181.118	10.2.181.119
95	10.2.181.120/30	10.2.181.121 – 10.2.181.122	10.2.181.123
96	10.2.181.124/30	10.2.181.125 – 10.2.181.126	10.2.181.127
97	10.2.181.128/30	10.2.181.129 – 10.2.181.130	10.2.181.131
98	10.2.181.132/30	10.2.181.133 – 10.2.181.134	10.2.181.135
99	10.2.181.136/30	10.2.181.137 – 10.2.181.138	10.2.181.139
100	10.2.181.140/30	10.2.181.141 – 10.2.181.142	10.2.181.143
101	10.2.181.144/30	10.2.181.145 – 10.2.181.146	10.2.181.147
102	10.2.181.148/30	10.2.181.149 – 10.2.181.150	10.2.181.151
103	10.2.181.152/30	10.2.181.153 – 10.2.181.154	10.2.181.155
104	10.2.181.156/30	10.2.181.157 – 10.2.181.158	10.2.181.159
105	10.2.181.160/30	10.2.181.161 – 10.2.181.162	10.2.181.163
106	10.2.181.164/30	10.2.181.165 – 10.2.181.166	10.2.181.167
107	10.2.181.168/30	10.2.181.169 – 10.2.181.170	10.2.181.171
108	10.2.181.172/30	10.2.181.173 – 10.2.181.174	10.2.181.175
109	10.2.181.176/30	10.2.181.177 – 10.2.181.178	10.2.181.179
110	10.2.181.180/30	10.2.181.181 – 10.2.181.182	10.2.181.183
111	10.2.181.184/30	10.2.181.185 – 10.2.181.186	10.2.181.187
112	10.2.181.188/30	10.2.181.189 – 10.2.181.190	10.2.181.191
113	10.2.181.192/30	10.2.181.193 – 10.2.181.194	10.2.181.195
114	10.2.181.196/30	10.2.181.197 – 10.2.181.198	10.2.181.199
115	10.2.181.200/30	10.2.181.201 – 10.2.181.202	10.2.181.203
116	10.2.181.204/30	10.2.181.205 – 10.2.181.206	10.2.181.207
117	10.2.181.208/30	10.2.181.209 – 10.2.181.210	10.2.181.211
118	10.2.181.212/30	10.2.181.213 – 10.2.181.214	10.2.181.215
119	10.2.181.216/30	10.2.181.217 – 10.2.181.218	10.2.181.219
120	10.2.181.220/30	10.2.181.221 – 10.2.181.222	10.2.181.223
121	10.2.181.224/30	10.2.181.225 – 10.2.181.226	10.2.181.227
122	10.2.181.228/30	10.2.181.229 – 10.2.181.230	10.2.181.231
123	10.2.181.232/30	10.2.181.233 – 10.2.181.234	10.2.181.235
124	10.2.181.236/30	10.2.181.237 – 10.2.181.238	10.2.181.239
125	10.2.181.240/30	10.2.181.241 – 10.2.181.242	10.2.181.243
126	10.2.181.244/30	10.2.181.245 – 10.2.181.246	10.2.181.247
127	10.2.181.248/30	10.2.181.249 – 10.2.181.250	10.2.181.251
128	10.2.181.252/30	10.2.181.253 – 10.2.181.254	10.2.181.255
129	10.2.182.0/30	10.2.182.1 – 10.2.182.2	10.2.182.3
130	10.2.182.4/30	10.2.182.5 – 10.2.182.6	10.2.182.7
131	10.2.182.8/30	10.2.182.9 – 10.2.182.10	10.2.182.11
132	10.2.182.12/30	10.2.182.13 – 10.2.182.14	10.2.182.15
133	10.2.182.16/30	10.2.182.17 – 10.2.182.18	10.2.182.19
134	10.2.182.20/30	10.2.182.21 – 10.2.182.22	10.2.182.23
135	10.2.182.24/30	10.2.182.25 – 10.2.182.26	10.2.182.27
136	10.2.182.28/30	10.2.182.29 – 10.2.182.30	10.2.182.31
137	10.2.182.32/30	10.2.182.33 – 10.2.182.34	10.2.182.35
138	10.2.182.36/30	10.2.182.37 – 10.2.182.38	10.2.182.39
139	10.2.182.40/30	10.2.182.41 – 10.2.182.42	10.2.182.43
140	10.2.182.44/30	10.2.182.45 – 10.2.182.46	10.2.182.47
141	10.2.182.48/30	10.2.182.49 – 10.2.182.50	10.2.182.51
142	10.2.182.52/30	10.2.182.53 – 10.2.182.54	10.2.182.55
143	10.2.182.56/30	10.2.182.57 – 10.2.182.58	10.2.182.59
144	10.2.182.60/30	10.2.182.61 – 10.2.182.62	10.2.182.63
145	10.2.182.64/30	10.2.182.65 – 10.2.182.66	10.2.182.67
146	10.2.182.68/30	10.2.182.69 – 10.2.182.70	10.2.182.71
147	10.2.182.72/30	10.2.182.73 – 10.2.182.74	10.2.182.75
148	10.2.182.76/30	10.2.182.77 – 10.2.182.78	10.2.182.79
149	10.2.182.80/30	10.2.182.81 – 10.2.182.82	10.2.182.83
150	10.2.182.84/30	10.2.182.85 – 10.2.182.86	10.2.182.87
151	10.2.182.88/30	10.2.182.89 – 10.2.182.90	10.2.182.91
152	10.2.182.92/30	10.2.182.93 – 10.2.182.94	10.2.182.95
153	10.2.182.96/30	10.2.182.97 – 10.2.182.98	10.2.182.99
154	10.2.182.100/30	10.2.182.101 – 10.2.182.102	10.2.182.103
155	10.2.182.104/30	10.2.182.105 – 10.2.182.106	10.2.182.107
156	10.2.182.108/30	10.2.182.109 – 10.2.182.110	10.2.182.111
157	10.2.182.112/30	10.2.182.113 – 10.2.182.114	10.2.182.115
158	10.2.182.116/30	10.2.182.117 – 10.2.182.118	10.2.182.119
159	10.2.182.120/30	10.2.182.121 – 10.2.182.122	10.2.182.123
160	10.2.182.124/30	10.2.182.125 – 10.2.182.126	10.2.182.127
161	10.2.182.128/30	10.2.182.129 – 10.2.182.130	10.2.182.131
162	10.2.182.132/30	10.2.182.133 – 10.2.182.134	10.2.182.135
163	10.2.182.136/30	10.2.182.137 – 10.2.182.138	10.2.182.139
164	10.2.182.140/30	10.2.182.141 – 10.2.182.142	10.2.182.143
165	10.2.182.144/30	10.2.182.145 – 10.2.182.146	10.2.182.147
166	10.2.182.148/30	10.2.182.149 – 10.2.182.150	10.2.182.151
167	10.2.182.152/30	10.2.182.153 – 10.2.182.154	10.2.182.155
168	10.2.182.156/30	10.2.182.157 – 10.2.182.158	10.2.182.159
169	10.2.182.160/30	10.2.182.161 – 10.2.182.162	10.2.182.163
170	10.2.182.164/30	10.2.182.165 – 10.2.182.166	10.2.182.167
171	10.2.182.168/30	10.2.182.169 – 10.2.182.170	10.2.182.171
172	10.2.182.172/30	10.2.182.173 – 10.2.182.174	10.2.182.175
173	10.2.182.176/30	10.2.182.177 – 10.2.182.178	10.2.182.179
174	10.2.182.180/30	10.2.182.181 – 10.2.182.182	10.2.182.183
175	10.2.182.184/30	10.2.182.185 – 10.2.182.186	10.2.182.187
176	10.2.182.188/30	10.2.182.189 – 10.2.182.190	10.2.182.191
177	10.2.182.192/30	10.2.182.193 – 10.2.182.194	10.2.182.195
178	10.2.182.196/30	10.2.182.197 – 10.2.182.198	10.2.182.199
179	10.2.182.200/30	10.2.182.201 – 10.2.182.202	10.2.182.203
180	10.2.182.204/30	10.2.182.205 – 10.2.182.206	10.2.182.207
181	10.2.182.208/30	10.2.182.209 – 10.2.182.210	10.2.182.211
182	10.2.182.212/30	10.2.182.213 – 10.2.182.214	10.2.182.215
183	10.2.182.216/30	10.2.182.217 – 10.2.182.218	10.2.182.219
184	10.2.182.220/30	10.2.182.221 – 10.2.182.222	10.2.182.223
185	10.2.182.224/30	10.2.182.225 – 10.2.182.226	10.2.182.227
186	10.2.182.228/30	10.2.182.229 – 10.2.182.230	10.2.182.231
187	10.2.182.232/30	10.2.182.233 – 10.2.182.234	10.2.182.235
188	10.2.182.236/30	10.2.182.237 – 10.2.182.238	10.2.182.239
189	10.2.182.240/30	10.2.182.241 – 10.2.182.242	10.2.182.243
190	10.2.182.244/30	10.2.182.245 – 10.2.182.246	10.2.182.247
191	10.2.182.248/30	10.2.182.249 – 10.2.182.250	10.2.182.251
192	10.2.182.252/30	10.2.182.253 – 10.2.182.254	10.2.182.255
193	10.2.183.0/30	10.2.183.1 – 10.2.183.2	10.2.183.3
194	10.2.183.4/30	10.2.183.5 – 10.2.183.6	10.2.183.7
195	10.2.183.8/30	10.2.183.9 – 10.2.183.10	10.2.183.11
196	10.2.183.12/30	10.2.183.13 – 10.2.183.14	10.2.183.15
197	10.2.183.16/30	10.2.183.17 – 10.2.183.18	10.2.183.19
198	10.2.183.20/30	10.2.183.21 – 10.2.183.22	10.2.183.23
199	10.2.183.24/30	10.2.183.25 – 10.2.183.26	10.2.183.27
200	10.2.183.28/30	10.2.183.29 – 10.2.183.30	10.2.183.31
201	10.2.183.32/30	10.2.183.33 – 10.2.183.34	10.2.183.35
202	10.2.183.36/30	10.2.183.37 – 10.2.183.38	10.2.183.39
203	10.2.183.40/30	10.2.183.41 – 10.2.183.42	10.2.183.43
204	10.2.183.44/30	10.2.183.45 – 10.2.183.46	10.2.183.47
205	10.2.183.48/30	10.2.183.49 – 10.2.183.50	10.2.183.51
206	10.2.183.52/30	10.2.183.53 – 10.2.183.54	10.2.183.55
207	10.2.183.56/30	10.2.183.57 – 10.2.183.58	10.2.183.59
208	10.2.183.60/30	10.2.183.61 – 10.2.183.62	10.2.183.63
209	10.2.183.64/30	10.2.183.65 – 10.2.183.66	10.2.183.67
210	10.2.183.68/30	10.2.183.69 – 10.2.183.70	10.2.183.71
211	10.2.183.72/30	10.2.183.73 – 10.2.183.74	10.2.183.75
212	10.2.183.76/30	10.2.183.77 – 10.2.183.78	10.2.183.79
213	10.2.183.80/30	10.2.183.81 – 10.2.183.82	10.2.183.83
214	10.2.183.84/30	10.2.183.85 – 10.2.183.86	10.2.183.87
215	10.2.183.88/30	10.2.183.89 – 10.2.183.90	10.2.183.91
216	10.2.183.92/30	10.2.183.93 – 10.2.183.94	10.2.183.95
217	10.2.183.96/30	10.2.183.97 – 10.2.183.98	10.2.183.99
218	10.2.183.100/30	10.2.183.101 – 10.2.183.102	10.2.183.103
219	10.2.183.104/30	10.2.183.105 – 10.2.183.106	10.2.183.107
220	10.2.183.108/30	10.2.183.109 – 10.2.183.110	10.2.183.111
221	10.2.183.112/30	10.2.183.113 – 10.2.183.114	10.2.183.115
222	10.2.183.116/30	10.2.183.117 – 10.2.183.118	10.2.183.119
223	10.2.183.120/30	10.2.183.121 – 10.2.183.122	10.2.183.123
224	10.2.183.124/30	10.2.183.125 – 10.2.183.126	10.2.183.127
225	10.2.183.128/30	10.2.183.129 – 10.2.183.130	10.2.183.131
226	10.2.183.132/30	10.2.183.133 – 10.2.183.134	10.2.183.135
227	10.2.183.136/30	10.2.183.137 – 10.2.183.138	10.2.183.139
228	10.2.183.140/30	10.2.183.141 – 10.2.183.142	10.2.183.143
229	10.2.183.144/30	10.2.183.145 – 10.2.183.146	10.2.183.147
230	10.2.183.148/30	10.2.183.149 – 10.2.183.150	10.2.183.151
231	10.2.183.152/30	10.2.183.153 – 10.2.183.154	10.2.183.155
232	10.2.183.156/30	10.2.183.157 – 10.2.183.158	10.2.183.159
233	10.2.183.160/30	10.2.183.161 – 10.2.183.162	10.2.183.163
234	10.2.183.164/30	10.2.183.165 – 10.2.183.166	10.2.183.167
235	10.2.183.168/30	10.2.183.169 – 10.2.183.170	10.2.183.171
236	10.2.183.172/30	10.2.183.173 – 10.2.183.174	10.2.183.175
237	10.2.183.176/30	10.2.183.177 – 10.2.183.178	10.2.183.179
238	10.2.183.180/30	10.2.183.181 – 10.2.183.182	10.2.183.183
239	10.2.183.184/30	10.2.183.185 – 10.2.183.186	10.2.183.187
240	10.2.183.188/30	10.2.183.189 – 10.2.183.190	10.2.183.191
241	10.2.183.192/30	10.2.183.193 – 10.2.183.194	10.2.183.195
242	10.2.183.196/30	10.2.183.197 – 10.2.183.198	10.2.183.199
243	10.2.183.200/30	10.2.183.201 – 10.2.183.202	10.2.183.203
244	10.2.183.204/30	10.2.183.205 – 10.2.183.206	10.2.183.207
245	10.2.183.208/30	10.2.183.209 – 10.2.183.210	10.2.183.211
246	10.2.183.212/30	10.2.183.213 – 10.2.183.214	10.2.183.215
247	10.2.183.216/30	10.2.183.217 – 10.2.183.218	10.2.183.219
248	10.2.183.220/30	10.2.183.221 – 10.2.183.222	10.2.183.223
249	10.2.183.224/30	10.2.183.225 – 10.2.183.226	10.2.183.227
250	10.2.183.228/30	10.2.183.229 – 10.2.183.230	10.2.183.231
251	10.2.183.232/30	10.2.183.233 – 10.2.183.234	10.2.183.235
252	10.2.183.236/30	10.2.183.237 – 10.2.183.238	10.2.183.239
253	10.2.183.240/30	10.2.183.241 – 10.2.183.242	10.2.183.243
254	10.2.183.244/30	10.2.183.245 – 10.2.183.246	10.2.183.247
255	10.2.183.248/30	10.2.183.249 – 10.2.183.250	10.2.183.251
256	10.2.183.252/30	10.2.183.253 – 10.2.183.254	10.2.183.255

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 →