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)10.3.28.0/22

network10.3.28.0/22

broadcast10.3.31.255

first host10.3.28.1

last host10.3.31.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.28.0/22

address00001010.00000011.00011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.00011100.00000000

broadcast00001010.00000011.00011111.11111111

green = network part, grey = host part

hex0x0a031c00

decimal167975936

reverse dns0.28.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:1c00

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.28.0/30	10.3.28.1 – 10.3.28.2	10.3.28.3
2	10.3.28.4/30	10.3.28.5 – 10.3.28.6	10.3.28.7
3	10.3.28.8/30	10.3.28.9 – 10.3.28.10	10.3.28.11
4	10.3.28.12/30	10.3.28.13 – 10.3.28.14	10.3.28.15
5	10.3.28.16/30	10.3.28.17 – 10.3.28.18	10.3.28.19
6	10.3.28.20/30	10.3.28.21 – 10.3.28.22	10.3.28.23
7	10.3.28.24/30	10.3.28.25 – 10.3.28.26	10.3.28.27
8	10.3.28.28/30	10.3.28.29 – 10.3.28.30	10.3.28.31
9	10.3.28.32/30	10.3.28.33 – 10.3.28.34	10.3.28.35
10	10.3.28.36/30	10.3.28.37 – 10.3.28.38	10.3.28.39
11	10.3.28.40/30	10.3.28.41 – 10.3.28.42	10.3.28.43
12	10.3.28.44/30	10.3.28.45 – 10.3.28.46	10.3.28.47
13	10.3.28.48/30	10.3.28.49 – 10.3.28.50	10.3.28.51
14	10.3.28.52/30	10.3.28.53 – 10.3.28.54	10.3.28.55
15	10.3.28.56/30	10.3.28.57 – 10.3.28.58	10.3.28.59
16	10.3.28.60/30	10.3.28.61 – 10.3.28.62	10.3.28.63
17	10.3.28.64/30	10.3.28.65 – 10.3.28.66	10.3.28.67
18	10.3.28.68/30	10.3.28.69 – 10.3.28.70	10.3.28.71
19	10.3.28.72/30	10.3.28.73 – 10.3.28.74	10.3.28.75
20	10.3.28.76/30	10.3.28.77 – 10.3.28.78	10.3.28.79
21	10.3.28.80/30	10.3.28.81 – 10.3.28.82	10.3.28.83
22	10.3.28.84/30	10.3.28.85 – 10.3.28.86	10.3.28.87
23	10.3.28.88/30	10.3.28.89 – 10.3.28.90	10.3.28.91
24	10.3.28.92/30	10.3.28.93 – 10.3.28.94	10.3.28.95
25	10.3.28.96/30	10.3.28.97 – 10.3.28.98	10.3.28.99
26	10.3.28.100/30	10.3.28.101 – 10.3.28.102	10.3.28.103
27	10.3.28.104/30	10.3.28.105 – 10.3.28.106	10.3.28.107
28	10.3.28.108/30	10.3.28.109 – 10.3.28.110	10.3.28.111
29	10.3.28.112/30	10.3.28.113 – 10.3.28.114	10.3.28.115
30	10.3.28.116/30	10.3.28.117 – 10.3.28.118	10.3.28.119
31	10.3.28.120/30	10.3.28.121 – 10.3.28.122	10.3.28.123
32	10.3.28.124/30	10.3.28.125 – 10.3.28.126	10.3.28.127
33	10.3.28.128/30	10.3.28.129 – 10.3.28.130	10.3.28.131
34	10.3.28.132/30	10.3.28.133 – 10.3.28.134	10.3.28.135
35	10.3.28.136/30	10.3.28.137 – 10.3.28.138	10.3.28.139
36	10.3.28.140/30	10.3.28.141 – 10.3.28.142	10.3.28.143
37	10.3.28.144/30	10.3.28.145 – 10.3.28.146	10.3.28.147
38	10.3.28.148/30	10.3.28.149 – 10.3.28.150	10.3.28.151
39	10.3.28.152/30	10.3.28.153 – 10.3.28.154	10.3.28.155
40	10.3.28.156/30	10.3.28.157 – 10.3.28.158	10.3.28.159
41	10.3.28.160/30	10.3.28.161 – 10.3.28.162	10.3.28.163
42	10.3.28.164/30	10.3.28.165 – 10.3.28.166	10.3.28.167
43	10.3.28.168/30	10.3.28.169 – 10.3.28.170	10.3.28.171
44	10.3.28.172/30	10.3.28.173 – 10.3.28.174	10.3.28.175
45	10.3.28.176/30	10.3.28.177 – 10.3.28.178	10.3.28.179
46	10.3.28.180/30	10.3.28.181 – 10.3.28.182	10.3.28.183
47	10.3.28.184/30	10.3.28.185 – 10.3.28.186	10.3.28.187
48	10.3.28.188/30	10.3.28.189 – 10.3.28.190	10.3.28.191
49	10.3.28.192/30	10.3.28.193 – 10.3.28.194	10.3.28.195
50	10.3.28.196/30	10.3.28.197 – 10.3.28.198	10.3.28.199
51	10.3.28.200/30	10.3.28.201 – 10.3.28.202	10.3.28.203
52	10.3.28.204/30	10.3.28.205 – 10.3.28.206	10.3.28.207
53	10.3.28.208/30	10.3.28.209 – 10.3.28.210	10.3.28.211
54	10.3.28.212/30	10.3.28.213 – 10.3.28.214	10.3.28.215
55	10.3.28.216/30	10.3.28.217 – 10.3.28.218	10.3.28.219
56	10.3.28.220/30	10.3.28.221 – 10.3.28.222	10.3.28.223
57	10.3.28.224/30	10.3.28.225 – 10.3.28.226	10.3.28.227
58	10.3.28.228/30	10.3.28.229 – 10.3.28.230	10.3.28.231
59	10.3.28.232/30	10.3.28.233 – 10.3.28.234	10.3.28.235
60	10.3.28.236/30	10.3.28.237 – 10.3.28.238	10.3.28.239
61	10.3.28.240/30	10.3.28.241 – 10.3.28.242	10.3.28.243
62	10.3.28.244/30	10.3.28.245 – 10.3.28.246	10.3.28.247
63	10.3.28.248/30	10.3.28.249 – 10.3.28.250	10.3.28.251
64	10.3.28.252/30	10.3.28.253 – 10.3.28.254	10.3.28.255
65	10.3.29.0/30	10.3.29.1 – 10.3.29.2	10.3.29.3
66	10.3.29.4/30	10.3.29.5 – 10.3.29.6	10.3.29.7
67	10.3.29.8/30	10.3.29.9 – 10.3.29.10	10.3.29.11
68	10.3.29.12/30	10.3.29.13 – 10.3.29.14	10.3.29.15
69	10.3.29.16/30	10.3.29.17 – 10.3.29.18	10.3.29.19
70	10.3.29.20/30	10.3.29.21 – 10.3.29.22	10.3.29.23
71	10.3.29.24/30	10.3.29.25 – 10.3.29.26	10.3.29.27
72	10.3.29.28/30	10.3.29.29 – 10.3.29.30	10.3.29.31
73	10.3.29.32/30	10.3.29.33 – 10.3.29.34	10.3.29.35
74	10.3.29.36/30	10.3.29.37 – 10.3.29.38	10.3.29.39
75	10.3.29.40/30	10.3.29.41 – 10.3.29.42	10.3.29.43
76	10.3.29.44/30	10.3.29.45 – 10.3.29.46	10.3.29.47
77	10.3.29.48/30	10.3.29.49 – 10.3.29.50	10.3.29.51
78	10.3.29.52/30	10.3.29.53 – 10.3.29.54	10.3.29.55
79	10.3.29.56/30	10.3.29.57 – 10.3.29.58	10.3.29.59
80	10.3.29.60/30	10.3.29.61 – 10.3.29.62	10.3.29.63
81	10.3.29.64/30	10.3.29.65 – 10.3.29.66	10.3.29.67
82	10.3.29.68/30	10.3.29.69 – 10.3.29.70	10.3.29.71
83	10.3.29.72/30	10.3.29.73 – 10.3.29.74	10.3.29.75
84	10.3.29.76/30	10.3.29.77 – 10.3.29.78	10.3.29.79
85	10.3.29.80/30	10.3.29.81 – 10.3.29.82	10.3.29.83
86	10.3.29.84/30	10.3.29.85 – 10.3.29.86	10.3.29.87
87	10.3.29.88/30	10.3.29.89 – 10.3.29.90	10.3.29.91
88	10.3.29.92/30	10.3.29.93 – 10.3.29.94	10.3.29.95
89	10.3.29.96/30	10.3.29.97 – 10.3.29.98	10.3.29.99
90	10.3.29.100/30	10.3.29.101 – 10.3.29.102	10.3.29.103
91	10.3.29.104/30	10.3.29.105 – 10.3.29.106	10.3.29.107
92	10.3.29.108/30	10.3.29.109 – 10.3.29.110	10.3.29.111
93	10.3.29.112/30	10.3.29.113 – 10.3.29.114	10.3.29.115
94	10.3.29.116/30	10.3.29.117 – 10.3.29.118	10.3.29.119
95	10.3.29.120/30	10.3.29.121 – 10.3.29.122	10.3.29.123
96	10.3.29.124/30	10.3.29.125 – 10.3.29.126	10.3.29.127
97	10.3.29.128/30	10.3.29.129 – 10.3.29.130	10.3.29.131
98	10.3.29.132/30	10.3.29.133 – 10.3.29.134	10.3.29.135
99	10.3.29.136/30	10.3.29.137 – 10.3.29.138	10.3.29.139
100	10.3.29.140/30	10.3.29.141 – 10.3.29.142	10.3.29.143
101	10.3.29.144/30	10.3.29.145 – 10.3.29.146	10.3.29.147
102	10.3.29.148/30	10.3.29.149 – 10.3.29.150	10.3.29.151
103	10.3.29.152/30	10.3.29.153 – 10.3.29.154	10.3.29.155
104	10.3.29.156/30	10.3.29.157 – 10.3.29.158	10.3.29.159
105	10.3.29.160/30	10.3.29.161 – 10.3.29.162	10.3.29.163
106	10.3.29.164/30	10.3.29.165 – 10.3.29.166	10.3.29.167
107	10.3.29.168/30	10.3.29.169 – 10.3.29.170	10.3.29.171
108	10.3.29.172/30	10.3.29.173 – 10.3.29.174	10.3.29.175
109	10.3.29.176/30	10.3.29.177 – 10.3.29.178	10.3.29.179
110	10.3.29.180/30	10.3.29.181 – 10.3.29.182	10.3.29.183
111	10.3.29.184/30	10.3.29.185 – 10.3.29.186	10.3.29.187
112	10.3.29.188/30	10.3.29.189 – 10.3.29.190	10.3.29.191
113	10.3.29.192/30	10.3.29.193 – 10.3.29.194	10.3.29.195
114	10.3.29.196/30	10.3.29.197 – 10.3.29.198	10.3.29.199
115	10.3.29.200/30	10.3.29.201 – 10.3.29.202	10.3.29.203
116	10.3.29.204/30	10.3.29.205 – 10.3.29.206	10.3.29.207
117	10.3.29.208/30	10.3.29.209 – 10.3.29.210	10.3.29.211
118	10.3.29.212/30	10.3.29.213 – 10.3.29.214	10.3.29.215
119	10.3.29.216/30	10.3.29.217 – 10.3.29.218	10.3.29.219
120	10.3.29.220/30	10.3.29.221 – 10.3.29.222	10.3.29.223
121	10.3.29.224/30	10.3.29.225 – 10.3.29.226	10.3.29.227
122	10.3.29.228/30	10.3.29.229 – 10.3.29.230	10.3.29.231
123	10.3.29.232/30	10.3.29.233 – 10.3.29.234	10.3.29.235
124	10.3.29.236/30	10.3.29.237 – 10.3.29.238	10.3.29.239
125	10.3.29.240/30	10.3.29.241 – 10.3.29.242	10.3.29.243
126	10.3.29.244/30	10.3.29.245 – 10.3.29.246	10.3.29.247
127	10.3.29.248/30	10.3.29.249 – 10.3.29.250	10.3.29.251
128	10.3.29.252/30	10.3.29.253 – 10.3.29.254	10.3.29.255
129	10.3.30.0/30	10.3.30.1 – 10.3.30.2	10.3.30.3
130	10.3.30.4/30	10.3.30.5 – 10.3.30.6	10.3.30.7
131	10.3.30.8/30	10.3.30.9 – 10.3.30.10	10.3.30.11
132	10.3.30.12/30	10.3.30.13 – 10.3.30.14	10.3.30.15
133	10.3.30.16/30	10.3.30.17 – 10.3.30.18	10.3.30.19
134	10.3.30.20/30	10.3.30.21 – 10.3.30.22	10.3.30.23
135	10.3.30.24/30	10.3.30.25 – 10.3.30.26	10.3.30.27
136	10.3.30.28/30	10.3.30.29 – 10.3.30.30	10.3.30.31
137	10.3.30.32/30	10.3.30.33 – 10.3.30.34	10.3.30.35
138	10.3.30.36/30	10.3.30.37 – 10.3.30.38	10.3.30.39
139	10.3.30.40/30	10.3.30.41 – 10.3.30.42	10.3.30.43
140	10.3.30.44/30	10.3.30.45 – 10.3.30.46	10.3.30.47
141	10.3.30.48/30	10.3.30.49 – 10.3.30.50	10.3.30.51
142	10.3.30.52/30	10.3.30.53 – 10.3.30.54	10.3.30.55
143	10.3.30.56/30	10.3.30.57 – 10.3.30.58	10.3.30.59
144	10.3.30.60/30	10.3.30.61 – 10.3.30.62	10.3.30.63
145	10.3.30.64/30	10.3.30.65 – 10.3.30.66	10.3.30.67
146	10.3.30.68/30	10.3.30.69 – 10.3.30.70	10.3.30.71
147	10.3.30.72/30	10.3.30.73 – 10.3.30.74	10.3.30.75
148	10.3.30.76/30	10.3.30.77 – 10.3.30.78	10.3.30.79
149	10.3.30.80/30	10.3.30.81 – 10.3.30.82	10.3.30.83
150	10.3.30.84/30	10.3.30.85 – 10.3.30.86	10.3.30.87
151	10.3.30.88/30	10.3.30.89 – 10.3.30.90	10.3.30.91
152	10.3.30.92/30	10.3.30.93 – 10.3.30.94	10.3.30.95
153	10.3.30.96/30	10.3.30.97 – 10.3.30.98	10.3.30.99
154	10.3.30.100/30	10.3.30.101 – 10.3.30.102	10.3.30.103
155	10.3.30.104/30	10.3.30.105 – 10.3.30.106	10.3.30.107
156	10.3.30.108/30	10.3.30.109 – 10.3.30.110	10.3.30.111
157	10.3.30.112/30	10.3.30.113 – 10.3.30.114	10.3.30.115
158	10.3.30.116/30	10.3.30.117 – 10.3.30.118	10.3.30.119
159	10.3.30.120/30	10.3.30.121 – 10.3.30.122	10.3.30.123
160	10.3.30.124/30	10.3.30.125 – 10.3.30.126	10.3.30.127
161	10.3.30.128/30	10.3.30.129 – 10.3.30.130	10.3.30.131
162	10.3.30.132/30	10.3.30.133 – 10.3.30.134	10.3.30.135
163	10.3.30.136/30	10.3.30.137 – 10.3.30.138	10.3.30.139
164	10.3.30.140/30	10.3.30.141 – 10.3.30.142	10.3.30.143
165	10.3.30.144/30	10.3.30.145 – 10.3.30.146	10.3.30.147
166	10.3.30.148/30	10.3.30.149 – 10.3.30.150	10.3.30.151
167	10.3.30.152/30	10.3.30.153 – 10.3.30.154	10.3.30.155
168	10.3.30.156/30	10.3.30.157 – 10.3.30.158	10.3.30.159
169	10.3.30.160/30	10.3.30.161 – 10.3.30.162	10.3.30.163
170	10.3.30.164/30	10.3.30.165 – 10.3.30.166	10.3.30.167
171	10.3.30.168/30	10.3.30.169 – 10.3.30.170	10.3.30.171
172	10.3.30.172/30	10.3.30.173 – 10.3.30.174	10.3.30.175
173	10.3.30.176/30	10.3.30.177 – 10.3.30.178	10.3.30.179
174	10.3.30.180/30	10.3.30.181 – 10.3.30.182	10.3.30.183
175	10.3.30.184/30	10.3.30.185 – 10.3.30.186	10.3.30.187
176	10.3.30.188/30	10.3.30.189 – 10.3.30.190	10.3.30.191
177	10.3.30.192/30	10.3.30.193 – 10.3.30.194	10.3.30.195
178	10.3.30.196/30	10.3.30.197 – 10.3.30.198	10.3.30.199
179	10.3.30.200/30	10.3.30.201 – 10.3.30.202	10.3.30.203
180	10.3.30.204/30	10.3.30.205 – 10.3.30.206	10.3.30.207
181	10.3.30.208/30	10.3.30.209 – 10.3.30.210	10.3.30.211
182	10.3.30.212/30	10.3.30.213 – 10.3.30.214	10.3.30.215
183	10.3.30.216/30	10.3.30.217 – 10.3.30.218	10.3.30.219
184	10.3.30.220/30	10.3.30.221 – 10.3.30.222	10.3.30.223
185	10.3.30.224/30	10.3.30.225 – 10.3.30.226	10.3.30.227
186	10.3.30.228/30	10.3.30.229 – 10.3.30.230	10.3.30.231
187	10.3.30.232/30	10.3.30.233 – 10.3.30.234	10.3.30.235
188	10.3.30.236/30	10.3.30.237 – 10.3.30.238	10.3.30.239
189	10.3.30.240/30	10.3.30.241 – 10.3.30.242	10.3.30.243
190	10.3.30.244/30	10.3.30.245 – 10.3.30.246	10.3.30.247
191	10.3.30.248/30	10.3.30.249 – 10.3.30.250	10.3.30.251
192	10.3.30.252/30	10.3.30.253 – 10.3.30.254	10.3.30.255
193	10.3.31.0/30	10.3.31.1 – 10.3.31.2	10.3.31.3
194	10.3.31.4/30	10.3.31.5 – 10.3.31.6	10.3.31.7
195	10.3.31.8/30	10.3.31.9 – 10.3.31.10	10.3.31.11
196	10.3.31.12/30	10.3.31.13 – 10.3.31.14	10.3.31.15
197	10.3.31.16/30	10.3.31.17 – 10.3.31.18	10.3.31.19
198	10.3.31.20/30	10.3.31.21 – 10.3.31.22	10.3.31.23
199	10.3.31.24/30	10.3.31.25 – 10.3.31.26	10.3.31.27
200	10.3.31.28/30	10.3.31.29 – 10.3.31.30	10.3.31.31
201	10.3.31.32/30	10.3.31.33 – 10.3.31.34	10.3.31.35
202	10.3.31.36/30	10.3.31.37 – 10.3.31.38	10.3.31.39
203	10.3.31.40/30	10.3.31.41 – 10.3.31.42	10.3.31.43
204	10.3.31.44/30	10.3.31.45 – 10.3.31.46	10.3.31.47
205	10.3.31.48/30	10.3.31.49 – 10.3.31.50	10.3.31.51
206	10.3.31.52/30	10.3.31.53 – 10.3.31.54	10.3.31.55
207	10.3.31.56/30	10.3.31.57 – 10.3.31.58	10.3.31.59
208	10.3.31.60/30	10.3.31.61 – 10.3.31.62	10.3.31.63
209	10.3.31.64/30	10.3.31.65 – 10.3.31.66	10.3.31.67
210	10.3.31.68/30	10.3.31.69 – 10.3.31.70	10.3.31.71
211	10.3.31.72/30	10.3.31.73 – 10.3.31.74	10.3.31.75
212	10.3.31.76/30	10.3.31.77 – 10.3.31.78	10.3.31.79
213	10.3.31.80/30	10.3.31.81 – 10.3.31.82	10.3.31.83
214	10.3.31.84/30	10.3.31.85 – 10.3.31.86	10.3.31.87
215	10.3.31.88/30	10.3.31.89 – 10.3.31.90	10.3.31.91
216	10.3.31.92/30	10.3.31.93 – 10.3.31.94	10.3.31.95
217	10.3.31.96/30	10.3.31.97 – 10.3.31.98	10.3.31.99
218	10.3.31.100/30	10.3.31.101 – 10.3.31.102	10.3.31.103
219	10.3.31.104/30	10.3.31.105 – 10.3.31.106	10.3.31.107
220	10.3.31.108/30	10.3.31.109 – 10.3.31.110	10.3.31.111
221	10.3.31.112/30	10.3.31.113 – 10.3.31.114	10.3.31.115
222	10.3.31.116/30	10.3.31.117 – 10.3.31.118	10.3.31.119
223	10.3.31.120/30	10.3.31.121 – 10.3.31.122	10.3.31.123
224	10.3.31.124/30	10.3.31.125 – 10.3.31.126	10.3.31.127
225	10.3.31.128/30	10.3.31.129 – 10.3.31.130	10.3.31.131
226	10.3.31.132/30	10.3.31.133 – 10.3.31.134	10.3.31.135
227	10.3.31.136/30	10.3.31.137 – 10.3.31.138	10.3.31.139
228	10.3.31.140/30	10.3.31.141 – 10.3.31.142	10.3.31.143
229	10.3.31.144/30	10.3.31.145 – 10.3.31.146	10.3.31.147
230	10.3.31.148/30	10.3.31.149 – 10.3.31.150	10.3.31.151
231	10.3.31.152/30	10.3.31.153 – 10.3.31.154	10.3.31.155
232	10.3.31.156/30	10.3.31.157 – 10.3.31.158	10.3.31.159
233	10.3.31.160/30	10.3.31.161 – 10.3.31.162	10.3.31.163
234	10.3.31.164/30	10.3.31.165 – 10.3.31.166	10.3.31.167
235	10.3.31.168/30	10.3.31.169 – 10.3.31.170	10.3.31.171
236	10.3.31.172/30	10.3.31.173 – 10.3.31.174	10.3.31.175
237	10.3.31.176/30	10.3.31.177 – 10.3.31.178	10.3.31.179
238	10.3.31.180/30	10.3.31.181 – 10.3.31.182	10.3.31.183
239	10.3.31.184/30	10.3.31.185 – 10.3.31.186	10.3.31.187
240	10.3.31.188/30	10.3.31.189 – 10.3.31.190	10.3.31.191
241	10.3.31.192/30	10.3.31.193 – 10.3.31.194	10.3.31.195
242	10.3.31.196/30	10.3.31.197 – 10.3.31.198	10.3.31.199
243	10.3.31.200/30	10.3.31.201 – 10.3.31.202	10.3.31.203
244	10.3.31.204/30	10.3.31.205 – 10.3.31.206	10.3.31.207
245	10.3.31.208/30	10.3.31.209 – 10.3.31.210	10.3.31.211
246	10.3.31.212/30	10.3.31.213 – 10.3.31.214	10.3.31.215
247	10.3.31.216/30	10.3.31.217 – 10.3.31.218	10.3.31.219
248	10.3.31.220/30	10.3.31.221 – 10.3.31.222	10.3.31.223
249	10.3.31.224/30	10.3.31.225 – 10.3.31.226	10.3.31.227
250	10.3.31.228/30	10.3.31.229 – 10.3.31.230	10.3.31.231
251	10.3.31.232/30	10.3.31.233 – 10.3.31.234	10.3.31.235
252	10.3.31.236/30	10.3.31.237 – 10.3.31.238	10.3.31.239
253	10.3.31.240/30	10.3.31.241 – 10.3.31.242	10.3.31.243
254	10.3.31.244/30	10.3.31.245 – 10.3.31.246	10.3.31.247
255	10.3.31.248/30	10.3.31.249 – 10.3.31.250	10.3.31.251
256	10.3.31.252/30	10.3.31.253 – 10.3.31.254	10.3.31.255

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 →