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)10.3.44.0/22

network10.3.44.0/22

broadcast10.3.47.255

first host10.3.44.1

last host10.3.47.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.44.0/22

address00001010.00000011.00101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.00101100.00000000

broadcast00001010.00000011.00101111.11111111

green = network part, grey = host part

hex0x0a032c00

decimal167980032

reverse dns0.44.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:2c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.44.0/30	10.3.44.1 – 10.3.44.2	10.3.44.3
2	10.3.44.4/30	10.3.44.5 – 10.3.44.6	10.3.44.7
3	10.3.44.8/30	10.3.44.9 – 10.3.44.10	10.3.44.11
4	10.3.44.12/30	10.3.44.13 – 10.3.44.14	10.3.44.15
5	10.3.44.16/30	10.3.44.17 – 10.3.44.18	10.3.44.19
6	10.3.44.20/30	10.3.44.21 – 10.3.44.22	10.3.44.23
7	10.3.44.24/30	10.3.44.25 – 10.3.44.26	10.3.44.27
8	10.3.44.28/30	10.3.44.29 – 10.3.44.30	10.3.44.31
9	10.3.44.32/30	10.3.44.33 – 10.3.44.34	10.3.44.35
10	10.3.44.36/30	10.3.44.37 – 10.3.44.38	10.3.44.39
11	10.3.44.40/30	10.3.44.41 – 10.3.44.42	10.3.44.43
12	10.3.44.44/30	10.3.44.45 – 10.3.44.46	10.3.44.47
13	10.3.44.48/30	10.3.44.49 – 10.3.44.50	10.3.44.51
14	10.3.44.52/30	10.3.44.53 – 10.3.44.54	10.3.44.55
15	10.3.44.56/30	10.3.44.57 – 10.3.44.58	10.3.44.59
16	10.3.44.60/30	10.3.44.61 – 10.3.44.62	10.3.44.63
17	10.3.44.64/30	10.3.44.65 – 10.3.44.66	10.3.44.67
18	10.3.44.68/30	10.3.44.69 – 10.3.44.70	10.3.44.71
19	10.3.44.72/30	10.3.44.73 – 10.3.44.74	10.3.44.75
20	10.3.44.76/30	10.3.44.77 – 10.3.44.78	10.3.44.79
21	10.3.44.80/30	10.3.44.81 – 10.3.44.82	10.3.44.83
22	10.3.44.84/30	10.3.44.85 – 10.3.44.86	10.3.44.87
23	10.3.44.88/30	10.3.44.89 – 10.3.44.90	10.3.44.91
24	10.3.44.92/30	10.3.44.93 – 10.3.44.94	10.3.44.95
25	10.3.44.96/30	10.3.44.97 – 10.3.44.98	10.3.44.99
26	10.3.44.100/30	10.3.44.101 – 10.3.44.102	10.3.44.103
27	10.3.44.104/30	10.3.44.105 – 10.3.44.106	10.3.44.107
28	10.3.44.108/30	10.3.44.109 – 10.3.44.110	10.3.44.111
29	10.3.44.112/30	10.3.44.113 – 10.3.44.114	10.3.44.115
30	10.3.44.116/30	10.3.44.117 – 10.3.44.118	10.3.44.119
31	10.3.44.120/30	10.3.44.121 – 10.3.44.122	10.3.44.123
32	10.3.44.124/30	10.3.44.125 – 10.3.44.126	10.3.44.127
33	10.3.44.128/30	10.3.44.129 – 10.3.44.130	10.3.44.131
34	10.3.44.132/30	10.3.44.133 – 10.3.44.134	10.3.44.135
35	10.3.44.136/30	10.3.44.137 – 10.3.44.138	10.3.44.139
36	10.3.44.140/30	10.3.44.141 – 10.3.44.142	10.3.44.143
37	10.3.44.144/30	10.3.44.145 – 10.3.44.146	10.3.44.147
38	10.3.44.148/30	10.3.44.149 – 10.3.44.150	10.3.44.151
39	10.3.44.152/30	10.3.44.153 – 10.3.44.154	10.3.44.155
40	10.3.44.156/30	10.3.44.157 – 10.3.44.158	10.3.44.159
41	10.3.44.160/30	10.3.44.161 – 10.3.44.162	10.3.44.163
42	10.3.44.164/30	10.3.44.165 – 10.3.44.166	10.3.44.167
43	10.3.44.168/30	10.3.44.169 – 10.3.44.170	10.3.44.171
44	10.3.44.172/30	10.3.44.173 – 10.3.44.174	10.3.44.175
45	10.3.44.176/30	10.3.44.177 – 10.3.44.178	10.3.44.179
46	10.3.44.180/30	10.3.44.181 – 10.3.44.182	10.3.44.183
47	10.3.44.184/30	10.3.44.185 – 10.3.44.186	10.3.44.187
48	10.3.44.188/30	10.3.44.189 – 10.3.44.190	10.3.44.191
49	10.3.44.192/30	10.3.44.193 – 10.3.44.194	10.3.44.195
50	10.3.44.196/30	10.3.44.197 – 10.3.44.198	10.3.44.199
51	10.3.44.200/30	10.3.44.201 – 10.3.44.202	10.3.44.203
52	10.3.44.204/30	10.3.44.205 – 10.3.44.206	10.3.44.207
53	10.3.44.208/30	10.3.44.209 – 10.3.44.210	10.3.44.211
54	10.3.44.212/30	10.3.44.213 – 10.3.44.214	10.3.44.215
55	10.3.44.216/30	10.3.44.217 – 10.3.44.218	10.3.44.219
56	10.3.44.220/30	10.3.44.221 – 10.3.44.222	10.3.44.223
57	10.3.44.224/30	10.3.44.225 – 10.3.44.226	10.3.44.227
58	10.3.44.228/30	10.3.44.229 – 10.3.44.230	10.3.44.231
59	10.3.44.232/30	10.3.44.233 – 10.3.44.234	10.3.44.235
60	10.3.44.236/30	10.3.44.237 – 10.3.44.238	10.3.44.239
61	10.3.44.240/30	10.3.44.241 – 10.3.44.242	10.3.44.243
62	10.3.44.244/30	10.3.44.245 – 10.3.44.246	10.3.44.247
63	10.3.44.248/30	10.3.44.249 – 10.3.44.250	10.3.44.251
64	10.3.44.252/30	10.3.44.253 – 10.3.44.254	10.3.44.255
65	10.3.45.0/30	10.3.45.1 – 10.3.45.2	10.3.45.3
66	10.3.45.4/30	10.3.45.5 – 10.3.45.6	10.3.45.7
67	10.3.45.8/30	10.3.45.9 – 10.3.45.10	10.3.45.11
68	10.3.45.12/30	10.3.45.13 – 10.3.45.14	10.3.45.15
69	10.3.45.16/30	10.3.45.17 – 10.3.45.18	10.3.45.19
70	10.3.45.20/30	10.3.45.21 – 10.3.45.22	10.3.45.23
71	10.3.45.24/30	10.3.45.25 – 10.3.45.26	10.3.45.27
72	10.3.45.28/30	10.3.45.29 – 10.3.45.30	10.3.45.31
73	10.3.45.32/30	10.3.45.33 – 10.3.45.34	10.3.45.35
74	10.3.45.36/30	10.3.45.37 – 10.3.45.38	10.3.45.39
75	10.3.45.40/30	10.3.45.41 – 10.3.45.42	10.3.45.43
76	10.3.45.44/30	10.3.45.45 – 10.3.45.46	10.3.45.47
77	10.3.45.48/30	10.3.45.49 – 10.3.45.50	10.3.45.51
78	10.3.45.52/30	10.3.45.53 – 10.3.45.54	10.3.45.55
79	10.3.45.56/30	10.3.45.57 – 10.3.45.58	10.3.45.59
80	10.3.45.60/30	10.3.45.61 – 10.3.45.62	10.3.45.63
81	10.3.45.64/30	10.3.45.65 – 10.3.45.66	10.3.45.67
82	10.3.45.68/30	10.3.45.69 – 10.3.45.70	10.3.45.71
83	10.3.45.72/30	10.3.45.73 – 10.3.45.74	10.3.45.75
84	10.3.45.76/30	10.3.45.77 – 10.3.45.78	10.3.45.79
85	10.3.45.80/30	10.3.45.81 – 10.3.45.82	10.3.45.83
86	10.3.45.84/30	10.3.45.85 – 10.3.45.86	10.3.45.87
87	10.3.45.88/30	10.3.45.89 – 10.3.45.90	10.3.45.91
88	10.3.45.92/30	10.3.45.93 – 10.3.45.94	10.3.45.95
89	10.3.45.96/30	10.3.45.97 – 10.3.45.98	10.3.45.99
90	10.3.45.100/30	10.3.45.101 – 10.3.45.102	10.3.45.103
91	10.3.45.104/30	10.3.45.105 – 10.3.45.106	10.3.45.107
92	10.3.45.108/30	10.3.45.109 – 10.3.45.110	10.3.45.111
93	10.3.45.112/30	10.3.45.113 – 10.3.45.114	10.3.45.115
94	10.3.45.116/30	10.3.45.117 – 10.3.45.118	10.3.45.119
95	10.3.45.120/30	10.3.45.121 – 10.3.45.122	10.3.45.123
96	10.3.45.124/30	10.3.45.125 – 10.3.45.126	10.3.45.127
97	10.3.45.128/30	10.3.45.129 – 10.3.45.130	10.3.45.131
98	10.3.45.132/30	10.3.45.133 – 10.3.45.134	10.3.45.135
99	10.3.45.136/30	10.3.45.137 – 10.3.45.138	10.3.45.139
100	10.3.45.140/30	10.3.45.141 – 10.3.45.142	10.3.45.143
101	10.3.45.144/30	10.3.45.145 – 10.3.45.146	10.3.45.147
102	10.3.45.148/30	10.3.45.149 – 10.3.45.150	10.3.45.151
103	10.3.45.152/30	10.3.45.153 – 10.3.45.154	10.3.45.155
104	10.3.45.156/30	10.3.45.157 – 10.3.45.158	10.3.45.159
105	10.3.45.160/30	10.3.45.161 – 10.3.45.162	10.3.45.163
106	10.3.45.164/30	10.3.45.165 – 10.3.45.166	10.3.45.167
107	10.3.45.168/30	10.3.45.169 – 10.3.45.170	10.3.45.171
108	10.3.45.172/30	10.3.45.173 – 10.3.45.174	10.3.45.175
109	10.3.45.176/30	10.3.45.177 – 10.3.45.178	10.3.45.179
110	10.3.45.180/30	10.3.45.181 – 10.3.45.182	10.3.45.183
111	10.3.45.184/30	10.3.45.185 – 10.3.45.186	10.3.45.187
112	10.3.45.188/30	10.3.45.189 – 10.3.45.190	10.3.45.191
113	10.3.45.192/30	10.3.45.193 – 10.3.45.194	10.3.45.195
114	10.3.45.196/30	10.3.45.197 – 10.3.45.198	10.3.45.199
115	10.3.45.200/30	10.3.45.201 – 10.3.45.202	10.3.45.203
116	10.3.45.204/30	10.3.45.205 – 10.3.45.206	10.3.45.207
117	10.3.45.208/30	10.3.45.209 – 10.3.45.210	10.3.45.211
118	10.3.45.212/30	10.3.45.213 – 10.3.45.214	10.3.45.215
119	10.3.45.216/30	10.3.45.217 – 10.3.45.218	10.3.45.219
120	10.3.45.220/30	10.3.45.221 – 10.3.45.222	10.3.45.223
121	10.3.45.224/30	10.3.45.225 – 10.3.45.226	10.3.45.227
122	10.3.45.228/30	10.3.45.229 – 10.3.45.230	10.3.45.231
123	10.3.45.232/30	10.3.45.233 – 10.3.45.234	10.3.45.235
124	10.3.45.236/30	10.3.45.237 – 10.3.45.238	10.3.45.239
125	10.3.45.240/30	10.3.45.241 – 10.3.45.242	10.3.45.243
126	10.3.45.244/30	10.3.45.245 – 10.3.45.246	10.3.45.247
127	10.3.45.248/30	10.3.45.249 – 10.3.45.250	10.3.45.251
128	10.3.45.252/30	10.3.45.253 – 10.3.45.254	10.3.45.255
129	10.3.46.0/30	10.3.46.1 – 10.3.46.2	10.3.46.3
130	10.3.46.4/30	10.3.46.5 – 10.3.46.6	10.3.46.7
131	10.3.46.8/30	10.3.46.9 – 10.3.46.10	10.3.46.11
132	10.3.46.12/30	10.3.46.13 – 10.3.46.14	10.3.46.15
133	10.3.46.16/30	10.3.46.17 – 10.3.46.18	10.3.46.19
134	10.3.46.20/30	10.3.46.21 – 10.3.46.22	10.3.46.23
135	10.3.46.24/30	10.3.46.25 – 10.3.46.26	10.3.46.27
136	10.3.46.28/30	10.3.46.29 – 10.3.46.30	10.3.46.31
137	10.3.46.32/30	10.3.46.33 – 10.3.46.34	10.3.46.35
138	10.3.46.36/30	10.3.46.37 – 10.3.46.38	10.3.46.39
139	10.3.46.40/30	10.3.46.41 – 10.3.46.42	10.3.46.43
140	10.3.46.44/30	10.3.46.45 – 10.3.46.46	10.3.46.47
141	10.3.46.48/30	10.3.46.49 – 10.3.46.50	10.3.46.51
142	10.3.46.52/30	10.3.46.53 – 10.3.46.54	10.3.46.55
143	10.3.46.56/30	10.3.46.57 – 10.3.46.58	10.3.46.59
144	10.3.46.60/30	10.3.46.61 – 10.3.46.62	10.3.46.63
145	10.3.46.64/30	10.3.46.65 – 10.3.46.66	10.3.46.67
146	10.3.46.68/30	10.3.46.69 – 10.3.46.70	10.3.46.71
147	10.3.46.72/30	10.3.46.73 – 10.3.46.74	10.3.46.75
148	10.3.46.76/30	10.3.46.77 – 10.3.46.78	10.3.46.79
149	10.3.46.80/30	10.3.46.81 – 10.3.46.82	10.3.46.83
150	10.3.46.84/30	10.3.46.85 – 10.3.46.86	10.3.46.87
151	10.3.46.88/30	10.3.46.89 – 10.3.46.90	10.3.46.91
152	10.3.46.92/30	10.3.46.93 – 10.3.46.94	10.3.46.95
153	10.3.46.96/30	10.3.46.97 – 10.3.46.98	10.3.46.99
154	10.3.46.100/30	10.3.46.101 – 10.3.46.102	10.3.46.103
155	10.3.46.104/30	10.3.46.105 – 10.3.46.106	10.3.46.107
156	10.3.46.108/30	10.3.46.109 – 10.3.46.110	10.3.46.111
157	10.3.46.112/30	10.3.46.113 – 10.3.46.114	10.3.46.115
158	10.3.46.116/30	10.3.46.117 – 10.3.46.118	10.3.46.119
159	10.3.46.120/30	10.3.46.121 – 10.3.46.122	10.3.46.123
160	10.3.46.124/30	10.3.46.125 – 10.3.46.126	10.3.46.127
161	10.3.46.128/30	10.3.46.129 – 10.3.46.130	10.3.46.131
162	10.3.46.132/30	10.3.46.133 – 10.3.46.134	10.3.46.135
163	10.3.46.136/30	10.3.46.137 – 10.3.46.138	10.3.46.139
164	10.3.46.140/30	10.3.46.141 – 10.3.46.142	10.3.46.143
165	10.3.46.144/30	10.3.46.145 – 10.3.46.146	10.3.46.147
166	10.3.46.148/30	10.3.46.149 – 10.3.46.150	10.3.46.151
167	10.3.46.152/30	10.3.46.153 – 10.3.46.154	10.3.46.155
168	10.3.46.156/30	10.3.46.157 – 10.3.46.158	10.3.46.159
169	10.3.46.160/30	10.3.46.161 – 10.3.46.162	10.3.46.163
170	10.3.46.164/30	10.3.46.165 – 10.3.46.166	10.3.46.167
171	10.3.46.168/30	10.3.46.169 – 10.3.46.170	10.3.46.171
172	10.3.46.172/30	10.3.46.173 – 10.3.46.174	10.3.46.175
173	10.3.46.176/30	10.3.46.177 – 10.3.46.178	10.3.46.179
174	10.3.46.180/30	10.3.46.181 – 10.3.46.182	10.3.46.183
175	10.3.46.184/30	10.3.46.185 – 10.3.46.186	10.3.46.187
176	10.3.46.188/30	10.3.46.189 – 10.3.46.190	10.3.46.191
177	10.3.46.192/30	10.3.46.193 – 10.3.46.194	10.3.46.195
178	10.3.46.196/30	10.3.46.197 – 10.3.46.198	10.3.46.199
179	10.3.46.200/30	10.3.46.201 – 10.3.46.202	10.3.46.203
180	10.3.46.204/30	10.3.46.205 – 10.3.46.206	10.3.46.207
181	10.3.46.208/30	10.3.46.209 – 10.3.46.210	10.3.46.211
182	10.3.46.212/30	10.3.46.213 – 10.3.46.214	10.3.46.215
183	10.3.46.216/30	10.3.46.217 – 10.3.46.218	10.3.46.219
184	10.3.46.220/30	10.3.46.221 – 10.3.46.222	10.3.46.223
185	10.3.46.224/30	10.3.46.225 – 10.3.46.226	10.3.46.227
186	10.3.46.228/30	10.3.46.229 – 10.3.46.230	10.3.46.231
187	10.3.46.232/30	10.3.46.233 – 10.3.46.234	10.3.46.235
188	10.3.46.236/30	10.3.46.237 – 10.3.46.238	10.3.46.239
189	10.3.46.240/30	10.3.46.241 – 10.3.46.242	10.3.46.243
190	10.3.46.244/30	10.3.46.245 – 10.3.46.246	10.3.46.247
191	10.3.46.248/30	10.3.46.249 – 10.3.46.250	10.3.46.251
192	10.3.46.252/30	10.3.46.253 – 10.3.46.254	10.3.46.255
193	10.3.47.0/30	10.3.47.1 – 10.3.47.2	10.3.47.3
194	10.3.47.4/30	10.3.47.5 – 10.3.47.6	10.3.47.7
195	10.3.47.8/30	10.3.47.9 – 10.3.47.10	10.3.47.11
196	10.3.47.12/30	10.3.47.13 – 10.3.47.14	10.3.47.15
197	10.3.47.16/30	10.3.47.17 – 10.3.47.18	10.3.47.19
198	10.3.47.20/30	10.3.47.21 – 10.3.47.22	10.3.47.23
199	10.3.47.24/30	10.3.47.25 – 10.3.47.26	10.3.47.27
200	10.3.47.28/30	10.3.47.29 – 10.3.47.30	10.3.47.31
201	10.3.47.32/30	10.3.47.33 – 10.3.47.34	10.3.47.35
202	10.3.47.36/30	10.3.47.37 – 10.3.47.38	10.3.47.39
203	10.3.47.40/30	10.3.47.41 – 10.3.47.42	10.3.47.43
204	10.3.47.44/30	10.3.47.45 – 10.3.47.46	10.3.47.47
205	10.3.47.48/30	10.3.47.49 – 10.3.47.50	10.3.47.51
206	10.3.47.52/30	10.3.47.53 – 10.3.47.54	10.3.47.55
207	10.3.47.56/30	10.3.47.57 – 10.3.47.58	10.3.47.59
208	10.3.47.60/30	10.3.47.61 – 10.3.47.62	10.3.47.63
209	10.3.47.64/30	10.3.47.65 – 10.3.47.66	10.3.47.67
210	10.3.47.68/30	10.3.47.69 – 10.3.47.70	10.3.47.71
211	10.3.47.72/30	10.3.47.73 – 10.3.47.74	10.3.47.75
212	10.3.47.76/30	10.3.47.77 – 10.3.47.78	10.3.47.79
213	10.3.47.80/30	10.3.47.81 – 10.3.47.82	10.3.47.83
214	10.3.47.84/30	10.3.47.85 – 10.3.47.86	10.3.47.87
215	10.3.47.88/30	10.3.47.89 – 10.3.47.90	10.3.47.91
216	10.3.47.92/30	10.3.47.93 – 10.3.47.94	10.3.47.95
217	10.3.47.96/30	10.3.47.97 – 10.3.47.98	10.3.47.99
218	10.3.47.100/30	10.3.47.101 – 10.3.47.102	10.3.47.103
219	10.3.47.104/30	10.3.47.105 – 10.3.47.106	10.3.47.107
220	10.3.47.108/30	10.3.47.109 – 10.3.47.110	10.3.47.111
221	10.3.47.112/30	10.3.47.113 – 10.3.47.114	10.3.47.115
222	10.3.47.116/30	10.3.47.117 – 10.3.47.118	10.3.47.119
223	10.3.47.120/30	10.3.47.121 – 10.3.47.122	10.3.47.123
224	10.3.47.124/30	10.3.47.125 – 10.3.47.126	10.3.47.127
225	10.3.47.128/30	10.3.47.129 – 10.3.47.130	10.3.47.131
226	10.3.47.132/30	10.3.47.133 – 10.3.47.134	10.3.47.135
227	10.3.47.136/30	10.3.47.137 – 10.3.47.138	10.3.47.139
228	10.3.47.140/30	10.3.47.141 – 10.3.47.142	10.3.47.143
229	10.3.47.144/30	10.3.47.145 – 10.3.47.146	10.3.47.147
230	10.3.47.148/30	10.3.47.149 – 10.3.47.150	10.3.47.151
231	10.3.47.152/30	10.3.47.153 – 10.3.47.154	10.3.47.155
232	10.3.47.156/30	10.3.47.157 – 10.3.47.158	10.3.47.159
233	10.3.47.160/30	10.3.47.161 – 10.3.47.162	10.3.47.163
234	10.3.47.164/30	10.3.47.165 – 10.3.47.166	10.3.47.167
235	10.3.47.168/30	10.3.47.169 – 10.3.47.170	10.3.47.171
236	10.3.47.172/30	10.3.47.173 – 10.3.47.174	10.3.47.175
237	10.3.47.176/30	10.3.47.177 – 10.3.47.178	10.3.47.179
238	10.3.47.180/30	10.3.47.181 – 10.3.47.182	10.3.47.183
239	10.3.47.184/30	10.3.47.185 – 10.3.47.186	10.3.47.187
240	10.3.47.188/30	10.3.47.189 – 10.3.47.190	10.3.47.191
241	10.3.47.192/30	10.3.47.193 – 10.3.47.194	10.3.47.195
242	10.3.47.196/30	10.3.47.197 – 10.3.47.198	10.3.47.199
243	10.3.47.200/30	10.3.47.201 – 10.3.47.202	10.3.47.203
244	10.3.47.204/30	10.3.47.205 – 10.3.47.206	10.3.47.207
245	10.3.47.208/30	10.3.47.209 – 10.3.47.210	10.3.47.211
246	10.3.47.212/30	10.3.47.213 – 10.3.47.214	10.3.47.215
247	10.3.47.216/30	10.3.47.217 – 10.3.47.218	10.3.47.219
248	10.3.47.220/30	10.3.47.221 – 10.3.47.222	10.3.47.223
249	10.3.47.224/30	10.3.47.225 – 10.3.47.226	10.3.47.227
250	10.3.47.228/30	10.3.47.229 – 10.3.47.230	10.3.47.231
251	10.3.47.232/30	10.3.47.233 – 10.3.47.234	10.3.47.235
252	10.3.47.236/30	10.3.47.237 – 10.3.47.238	10.3.47.239
253	10.3.47.240/30	10.3.47.241 – 10.3.47.242	10.3.47.243
254	10.3.47.244/30	10.3.47.245 – 10.3.47.246	10.3.47.247
255	10.3.47.248/30	10.3.47.249 – 10.3.47.250	10.3.47.251
256	10.3.47.252/30	10.3.47.253 – 10.3.47.254	10.3.47.255

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 →