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)10.45.200.0/22

network10.45.200.0/22

broadcast10.45.203.255

first host10.45.200.1

last host10.45.203.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.45.200.0/22

address00001010.00101101.11001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00101101.11001000.00000000

broadcast00001010.00101101.11001011.11111111

green = network part, grey = host part

hex0x0a2dc800

decimal170772480

reverse dns0.200.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:c800

/22 split into /30 · 256 subnets

close ×

#	network	host range	broadcast
1	10.45.200.0/30	10.45.200.1 – 10.45.200.2	10.45.200.3
2	10.45.200.4/30	10.45.200.5 – 10.45.200.6	10.45.200.7
3	10.45.200.8/30	10.45.200.9 – 10.45.200.10	10.45.200.11
4	10.45.200.12/30	10.45.200.13 – 10.45.200.14	10.45.200.15
5	10.45.200.16/30	10.45.200.17 – 10.45.200.18	10.45.200.19
6	10.45.200.20/30	10.45.200.21 – 10.45.200.22	10.45.200.23
7	10.45.200.24/30	10.45.200.25 – 10.45.200.26	10.45.200.27
8	10.45.200.28/30	10.45.200.29 – 10.45.200.30	10.45.200.31
9	10.45.200.32/30	10.45.200.33 – 10.45.200.34	10.45.200.35
10	10.45.200.36/30	10.45.200.37 – 10.45.200.38	10.45.200.39
11	10.45.200.40/30	10.45.200.41 – 10.45.200.42	10.45.200.43
12	10.45.200.44/30	10.45.200.45 – 10.45.200.46	10.45.200.47
13	10.45.200.48/30	10.45.200.49 – 10.45.200.50	10.45.200.51
14	10.45.200.52/30	10.45.200.53 – 10.45.200.54	10.45.200.55
15	10.45.200.56/30	10.45.200.57 – 10.45.200.58	10.45.200.59
16	10.45.200.60/30	10.45.200.61 – 10.45.200.62	10.45.200.63
17	10.45.200.64/30	10.45.200.65 – 10.45.200.66	10.45.200.67
18	10.45.200.68/30	10.45.200.69 – 10.45.200.70	10.45.200.71
19	10.45.200.72/30	10.45.200.73 – 10.45.200.74	10.45.200.75
20	10.45.200.76/30	10.45.200.77 – 10.45.200.78	10.45.200.79
21	10.45.200.80/30	10.45.200.81 – 10.45.200.82	10.45.200.83
22	10.45.200.84/30	10.45.200.85 – 10.45.200.86	10.45.200.87
23	10.45.200.88/30	10.45.200.89 – 10.45.200.90	10.45.200.91
24	10.45.200.92/30	10.45.200.93 – 10.45.200.94	10.45.200.95
25	10.45.200.96/30	10.45.200.97 – 10.45.200.98	10.45.200.99
26	10.45.200.100/30	10.45.200.101 – 10.45.200.102	10.45.200.103
27	10.45.200.104/30	10.45.200.105 – 10.45.200.106	10.45.200.107
28	10.45.200.108/30	10.45.200.109 – 10.45.200.110	10.45.200.111
29	10.45.200.112/30	10.45.200.113 – 10.45.200.114	10.45.200.115
30	10.45.200.116/30	10.45.200.117 – 10.45.200.118	10.45.200.119
31	10.45.200.120/30	10.45.200.121 – 10.45.200.122	10.45.200.123
32	10.45.200.124/30	10.45.200.125 – 10.45.200.126	10.45.200.127
33	10.45.200.128/30	10.45.200.129 – 10.45.200.130	10.45.200.131
34	10.45.200.132/30	10.45.200.133 – 10.45.200.134	10.45.200.135
35	10.45.200.136/30	10.45.200.137 – 10.45.200.138	10.45.200.139
36	10.45.200.140/30	10.45.200.141 – 10.45.200.142	10.45.200.143
37	10.45.200.144/30	10.45.200.145 – 10.45.200.146	10.45.200.147
38	10.45.200.148/30	10.45.200.149 – 10.45.200.150	10.45.200.151
39	10.45.200.152/30	10.45.200.153 – 10.45.200.154	10.45.200.155
40	10.45.200.156/30	10.45.200.157 – 10.45.200.158	10.45.200.159
41	10.45.200.160/30	10.45.200.161 – 10.45.200.162	10.45.200.163
42	10.45.200.164/30	10.45.200.165 – 10.45.200.166	10.45.200.167
43	10.45.200.168/30	10.45.200.169 – 10.45.200.170	10.45.200.171
44	10.45.200.172/30	10.45.200.173 – 10.45.200.174	10.45.200.175
45	10.45.200.176/30	10.45.200.177 – 10.45.200.178	10.45.200.179
46	10.45.200.180/30	10.45.200.181 – 10.45.200.182	10.45.200.183
47	10.45.200.184/30	10.45.200.185 – 10.45.200.186	10.45.200.187
48	10.45.200.188/30	10.45.200.189 – 10.45.200.190	10.45.200.191
49	10.45.200.192/30	10.45.200.193 – 10.45.200.194	10.45.200.195
50	10.45.200.196/30	10.45.200.197 – 10.45.200.198	10.45.200.199
51	10.45.200.200/30	10.45.200.201 – 10.45.200.202	10.45.200.203
52	10.45.200.204/30	10.45.200.205 – 10.45.200.206	10.45.200.207
53	10.45.200.208/30	10.45.200.209 – 10.45.200.210	10.45.200.211
54	10.45.200.212/30	10.45.200.213 – 10.45.200.214	10.45.200.215
55	10.45.200.216/30	10.45.200.217 – 10.45.200.218	10.45.200.219
56	10.45.200.220/30	10.45.200.221 – 10.45.200.222	10.45.200.223
57	10.45.200.224/30	10.45.200.225 – 10.45.200.226	10.45.200.227
58	10.45.200.228/30	10.45.200.229 – 10.45.200.230	10.45.200.231
59	10.45.200.232/30	10.45.200.233 – 10.45.200.234	10.45.200.235
60	10.45.200.236/30	10.45.200.237 – 10.45.200.238	10.45.200.239
61	10.45.200.240/30	10.45.200.241 – 10.45.200.242	10.45.200.243
62	10.45.200.244/30	10.45.200.245 – 10.45.200.246	10.45.200.247
63	10.45.200.248/30	10.45.200.249 – 10.45.200.250	10.45.200.251
64	10.45.200.252/30	10.45.200.253 – 10.45.200.254	10.45.200.255
65	10.45.201.0/30	10.45.201.1 – 10.45.201.2	10.45.201.3
66	10.45.201.4/30	10.45.201.5 – 10.45.201.6	10.45.201.7
67	10.45.201.8/30	10.45.201.9 – 10.45.201.10	10.45.201.11
68	10.45.201.12/30	10.45.201.13 – 10.45.201.14	10.45.201.15
69	10.45.201.16/30	10.45.201.17 – 10.45.201.18	10.45.201.19
70	10.45.201.20/30	10.45.201.21 – 10.45.201.22	10.45.201.23
71	10.45.201.24/30	10.45.201.25 – 10.45.201.26	10.45.201.27
72	10.45.201.28/30	10.45.201.29 – 10.45.201.30	10.45.201.31
73	10.45.201.32/30	10.45.201.33 – 10.45.201.34	10.45.201.35
74	10.45.201.36/30	10.45.201.37 – 10.45.201.38	10.45.201.39
75	10.45.201.40/30	10.45.201.41 – 10.45.201.42	10.45.201.43
76	10.45.201.44/30	10.45.201.45 – 10.45.201.46	10.45.201.47
77	10.45.201.48/30	10.45.201.49 – 10.45.201.50	10.45.201.51
78	10.45.201.52/30	10.45.201.53 – 10.45.201.54	10.45.201.55
79	10.45.201.56/30	10.45.201.57 – 10.45.201.58	10.45.201.59
80	10.45.201.60/30	10.45.201.61 – 10.45.201.62	10.45.201.63
81	10.45.201.64/30	10.45.201.65 – 10.45.201.66	10.45.201.67
82	10.45.201.68/30	10.45.201.69 – 10.45.201.70	10.45.201.71
83	10.45.201.72/30	10.45.201.73 – 10.45.201.74	10.45.201.75
84	10.45.201.76/30	10.45.201.77 – 10.45.201.78	10.45.201.79
85	10.45.201.80/30	10.45.201.81 – 10.45.201.82	10.45.201.83
86	10.45.201.84/30	10.45.201.85 – 10.45.201.86	10.45.201.87
87	10.45.201.88/30	10.45.201.89 – 10.45.201.90	10.45.201.91
88	10.45.201.92/30	10.45.201.93 – 10.45.201.94	10.45.201.95
89	10.45.201.96/30	10.45.201.97 – 10.45.201.98	10.45.201.99
90	10.45.201.100/30	10.45.201.101 – 10.45.201.102	10.45.201.103
91	10.45.201.104/30	10.45.201.105 – 10.45.201.106	10.45.201.107
92	10.45.201.108/30	10.45.201.109 – 10.45.201.110	10.45.201.111
93	10.45.201.112/30	10.45.201.113 – 10.45.201.114	10.45.201.115
94	10.45.201.116/30	10.45.201.117 – 10.45.201.118	10.45.201.119
95	10.45.201.120/30	10.45.201.121 – 10.45.201.122	10.45.201.123
96	10.45.201.124/30	10.45.201.125 – 10.45.201.126	10.45.201.127
97	10.45.201.128/30	10.45.201.129 – 10.45.201.130	10.45.201.131
98	10.45.201.132/30	10.45.201.133 – 10.45.201.134	10.45.201.135
99	10.45.201.136/30	10.45.201.137 – 10.45.201.138	10.45.201.139
100	10.45.201.140/30	10.45.201.141 – 10.45.201.142	10.45.201.143
101	10.45.201.144/30	10.45.201.145 – 10.45.201.146	10.45.201.147
102	10.45.201.148/30	10.45.201.149 – 10.45.201.150	10.45.201.151
103	10.45.201.152/30	10.45.201.153 – 10.45.201.154	10.45.201.155
104	10.45.201.156/30	10.45.201.157 – 10.45.201.158	10.45.201.159
105	10.45.201.160/30	10.45.201.161 – 10.45.201.162	10.45.201.163
106	10.45.201.164/30	10.45.201.165 – 10.45.201.166	10.45.201.167
107	10.45.201.168/30	10.45.201.169 – 10.45.201.170	10.45.201.171
108	10.45.201.172/30	10.45.201.173 – 10.45.201.174	10.45.201.175
109	10.45.201.176/30	10.45.201.177 – 10.45.201.178	10.45.201.179
110	10.45.201.180/30	10.45.201.181 – 10.45.201.182	10.45.201.183
111	10.45.201.184/30	10.45.201.185 – 10.45.201.186	10.45.201.187
112	10.45.201.188/30	10.45.201.189 – 10.45.201.190	10.45.201.191
113	10.45.201.192/30	10.45.201.193 – 10.45.201.194	10.45.201.195
114	10.45.201.196/30	10.45.201.197 – 10.45.201.198	10.45.201.199
115	10.45.201.200/30	10.45.201.201 – 10.45.201.202	10.45.201.203
116	10.45.201.204/30	10.45.201.205 – 10.45.201.206	10.45.201.207
117	10.45.201.208/30	10.45.201.209 – 10.45.201.210	10.45.201.211
118	10.45.201.212/30	10.45.201.213 – 10.45.201.214	10.45.201.215
119	10.45.201.216/30	10.45.201.217 – 10.45.201.218	10.45.201.219
120	10.45.201.220/30	10.45.201.221 – 10.45.201.222	10.45.201.223
121	10.45.201.224/30	10.45.201.225 – 10.45.201.226	10.45.201.227
122	10.45.201.228/30	10.45.201.229 – 10.45.201.230	10.45.201.231
123	10.45.201.232/30	10.45.201.233 – 10.45.201.234	10.45.201.235
124	10.45.201.236/30	10.45.201.237 – 10.45.201.238	10.45.201.239
125	10.45.201.240/30	10.45.201.241 – 10.45.201.242	10.45.201.243
126	10.45.201.244/30	10.45.201.245 – 10.45.201.246	10.45.201.247
127	10.45.201.248/30	10.45.201.249 – 10.45.201.250	10.45.201.251
128	10.45.201.252/30	10.45.201.253 – 10.45.201.254	10.45.201.255
129	10.45.202.0/30	10.45.202.1 – 10.45.202.2	10.45.202.3
130	10.45.202.4/30	10.45.202.5 – 10.45.202.6	10.45.202.7
131	10.45.202.8/30	10.45.202.9 – 10.45.202.10	10.45.202.11
132	10.45.202.12/30	10.45.202.13 – 10.45.202.14	10.45.202.15
133	10.45.202.16/30	10.45.202.17 – 10.45.202.18	10.45.202.19
134	10.45.202.20/30	10.45.202.21 – 10.45.202.22	10.45.202.23
135	10.45.202.24/30	10.45.202.25 – 10.45.202.26	10.45.202.27
136	10.45.202.28/30	10.45.202.29 – 10.45.202.30	10.45.202.31
137	10.45.202.32/30	10.45.202.33 – 10.45.202.34	10.45.202.35
138	10.45.202.36/30	10.45.202.37 – 10.45.202.38	10.45.202.39
139	10.45.202.40/30	10.45.202.41 – 10.45.202.42	10.45.202.43
140	10.45.202.44/30	10.45.202.45 – 10.45.202.46	10.45.202.47
141	10.45.202.48/30	10.45.202.49 – 10.45.202.50	10.45.202.51
142	10.45.202.52/30	10.45.202.53 – 10.45.202.54	10.45.202.55
143	10.45.202.56/30	10.45.202.57 – 10.45.202.58	10.45.202.59
144	10.45.202.60/30	10.45.202.61 – 10.45.202.62	10.45.202.63
145	10.45.202.64/30	10.45.202.65 – 10.45.202.66	10.45.202.67
146	10.45.202.68/30	10.45.202.69 – 10.45.202.70	10.45.202.71
147	10.45.202.72/30	10.45.202.73 – 10.45.202.74	10.45.202.75
148	10.45.202.76/30	10.45.202.77 – 10.45.202.78	10.45.202.79
149	10.45.202.80/30	10.45.202.81 – 10.45.202.82	10.45.202.83
150	10.45.202.84/30	10.45.202.85 – 10.45.202.86	10.45.202.87
151	10.45.202.88/30	10.45.202.89 – 10.45.202.90	10.45.202.91
152	10.45.202.92/30	10.45.202.93 – 10.45.202.94	10.45.202.95
153	10.45.202.96/30	10.45.202.97 – 10.45.202.98	10.45.202.99
154	10.45.202.100/30	10.45.202.101 – 10.45.202.102	10.45.202.103
155	10.45.202.104/30	10.45.202.105 – 10.45.202.106	10.45.202.107
156	10.45.202.108/30	10.45.202.109 – 10.45.202.110	10.45.202.111
157	10.45.202.112/30	10.45.202.113 – 10.45.202.114	10.45.202.115
158	10.45.202.116/30	10.45.202.117 – 10.45.202.118	10.45.202.119
159	10.45.202.120/30	10.45.202.121 – 10.45.202.122	10.45.202.123
160	10.45.202.124/30	10.45.202.125 – 10.45.202.126	10.45.202.127
161	10.45.202.128/30	10.45.202.129 – 10.45.202.130	10.45.202.131
162	10.45.202.132/30	10.45.202.133 – 10.45.202.134	10.45.202.135
163	10.45.202.136/30	10.45.202.137 – 10.45.202.138	10.45.202.139
164	10.45.202.140/30	10.45.202.141 – 10.45.202.142	10.45.202.143
165	10.45.202.144/30	10.45.202.145 – 10.45.202.146	10.45.202.147
166	10.45.202.148/30	10.45.202.149 – 10.45.202.150	10.45.202.151
167	10.45.202.152/30	10.45.202.153 – 10.45.202.154	10.45.202.155
168	10.45.202.156/30	10.45.202.157 – 10.45.202.158	10.45.202.159
169	10.45.202.160/30	10.45.202.161 – 10.45.202.162	10.45.202.163
170	10.45.202.164/30	10.45.202.165 – 10.45.202.166	10.45.202.167
171	10.45.202.168/30	10.45.202.169 – 10.45.202.170	10.45.202.171
172	10.45.202.172/30	10.45.202.173 – 10.45.202.174	10.45.202.175
173	10.45.202.176/30	10.45.202.177 – 10.45.202.178	10.45.202.179
174	10.45.202.180/30	10.45.202.181 – 10.45.202.182	10.45.202.183
175	10.45.202.184/30	10.45.202.185 – 10.45.202.186	10.45.202.187
176	10.45.202.188/30	10.45.202.189 – 10.45.202.190	10.45.202.191
177	10.45.202.192/30	10.45.202.193 – 10.45.202.194	10.45.202.195
178	10.45.202.196/30	10.45.202.197 – 10.45.202.198	10.45.202.199
179	10.45.202.200/30	10.45.202.201 – 10.45.202.202	10.45.202.203
180	10.45.202.204/30	10.45.202.205 – 10.45.202.206	10.45.202.207
181	10.45.202.208/30	10.45.202.209 – 10.45.202.210	10.45.202.211
182	10.45.202.212/30	10.45.202.213 – 10.45.202.214	10.45.202.215
183	10.45.202.216/30	10.45.202.217 – 10.45.202.218	10.45.202.219
184	10.45.202.220/30	10.45.202.221 – 10.45.202.222	10.45.202.223
185	10.45.202.224/30	10.45.202.225 – 10.45.202.226	10.45.202.227
186	10.45.202.228/30	10.45.202.229 – 10.45.202.230	10.45.202.231
187	10.45.202.232/30	10.45.202.233 – 10.45.202.234	10.45.202.235
188	10.45.202.236/30	10.45.202.237 – 10.45.202.238	10.45.202.239
189	10.45.202.240/30	10.45.202.241 – 10.45.202.242	10.45.202.243
190	10.45.202.244/30	10.45.202.245 – 10.45.202.246	10.45.202.247
191	10.45.202.248/30	10.45.202.249 – 10.45.202.250	10.45.202.251
192	10.45.202.252/30	10.45.202.253 – 10.45.202.254	10.45.202.255
193	10.45.203.0/30	10.45.203.1 – 10.45.203.2	10.45.203.3
194	10.45.203.4/30	10.45.203.5 – 10.45.203.6	10.45.203.7
195	10.45.203.8/30	10.45.203.9 – 10.45.203.10	10.45.203.11
196	10.45.203.12/30	10.45.203.13 – 10.45.203.14	10.45.203.15
197	10.45.203.16/30	10.45.203.17 – 10.45.203.18	10.45.203.19
198	10.45.203.20/30	10.45.203.21 – 10.45.203.22	10.45.203.23
199	10.45.203.24/30	10.45.203.25 – 10.45.203.26	10.45.203.27
200	10.45.203.28/30	10.45.203.29 – 10.45.203.30	10.45.203.31
201	10.45.203.32/30	10.45.203.33 – 10.45.203.34	10.45.203.35
202	10.45.203.36/30	10.45.203.37 – 10.45.203.38	10.45.203.39
203	10.45.203.40/30	10.45.203.41 – 10.45.203.42	10.45.203.43
204	10.45.203.44/30	10.45.203.45 – 10.45.203.46	10.45.203.47
205	10.45.203.48/30	10.45.203.49 – 10.45.203.50	10.45.203.51
206	10.45.203.52/30	10.45.203.53 – 10.45.203.54	10.45.203.55
207	10.45.203.56/30	10.45.203.57 – 10.45.203.58	10.45.203.59
208	10.45.203.60/30	10.45.203.61 – 10.45.203.62	10.45.203.63
209	10.45.203.64/30	10.45.203.65 – 10.45.203.66	10.45.203.67
210	10.45.203.68/30	10.45.203.69 – 10.45.203.70	10.45.203.71
211	10.45.203.72/30	10.45.203.73 – 10.45.203.74	10.45.203.75
212	10.45.203.76/30	10.45.203.77 – 10.45.203.78	10.45.203.79
213	10.45.203.80/30	10.45.203.81 – 10.45.203.82	10.45.203.83
214	10.45.203.84/30	10.45.203.85 – 10.45.203.86	10.45.203.87
215	10.45.203.88/30	10.45.203.89 – 10.45.203.90	10.45.203.91
216	10.45.203.92/30	10.45.203.93 – 10.45.203.94	10.45.203.95
217	10.45.203.96/30	10.45.203.97 – 10.45.203.98	10.45.203.99
218	10.45.203.100/30	10.45.203.101 – 10.45.203.102	10.45.203.103
219	10.45.203.104/30	10.45.203.105 – 10.45.203.106	10.45.203.107
220	10.45.203.108/30	10.45.203.109 – 10.45.203.110	10.45.203.111
221	10.45.203.112/30	10.45.203.113 – 10.45.203.114	10.45.203.115
222	10.45.203.116/30	10.45.203.117 – 10.45.203.118	10.45.203.119
223	10.45.203.120/30	10.45.203.121 – 10.45.203.122	10.45.203.123
224	10.45.203.124/30	10.45.203.125 – 10.45.203.126	10.45.203.127
225	10.45.203.128/30	10.45.203.129 – 10.45.203.130	10.45.203.131
226	10.45.203.132/30	10.45.203.133 – 10.45.203.134	10.45.203.135
227	10.45.203.136/30	10.45.203.137 – 10.45.203.138	10.45.203.139
228	10.45.203.140/30	10.45.203.141 – 10.45.203.142	10.45.203.143
229	10.45.203.144/30	10.45.203.145 – 10.45.203.146	10.45.203.147
230	10.45.203.148/30	10.45.203.149 – 10.45.203.150	10.45.203.151
231	10.45.203.152/30	10.45.203.153 – 10.45.203.154	10.45.203.155
232	10.45.203.156/30	10.45.203.157 – 10.45.203.158	10.45.203.159
233	10.45.203.160/30	10.45.203.161 – 10.45.203.162	10.45.203.163
234	10.45.203.164/30	10.45.203.165 – 10.45.203.166	10.45.203.167
235	10.45.203.168/30	10.45.203.169 – 10.45.203.170	10.45.203.171
236	10.45.203.172/30	10.45.203.173 – 10.45.203.174	10.45.203.175
237	10.45.203.176/30	10.45.203.177 – 10.45.203.178	10.45.203.179
238	10.45.203.180/30	10.45.203.181 – 10.45.203.182	10.45.203.183
239	10.45.203.184/30	10.45.203.185 – 10.45.203.186	10.45.203.187
240	10.45.203.188/30	10.45.203.189 – 10.45.203.190	10.45.203.191
241	10.45.203.192/30	10.45.203.193 – 10.45.203.194	10.45.203.195
242	10.45.203.196/30	10.45.203.197 – 10.45.203.198	10.45.203.199
243	10.45.203.200/30	10.45.203.201 – 10.45.203.202	10.45.203.203
244	10.45.203.204/30	10.45.203.205 – 10.45.203.206	10.45.203.207
245	10.45.203.208/30	10.45.203.209 – 10.45.203.210	10.45.203.211
246	10.45.203.212/30	10.45.203.213 – 10.45.203.214	10.45.203.215
247	10.45.203.216/30	10.45.203.217 – 10.45.203.218	10.45.203.219
248	10.45.203.220/30	10.45.203.221 – 10.45.203.222	10.45.203.223
249	10.45.203.224/30	10.45.203.225 – 10.45.203.226	10.45.203.227
250	10.45.203.228/30	10.45.203.229 – 10.45.203.230	10.45.203.231
251	10.45.203.232/30	10.45.203.233 – 10.45.203.234	10.45.203.235
252	10.45.203.236/30	10.45.203.237 – 10.45.203.238	10.45.203.239
253	10.45.203.240/30	10.45.203.241 – 10.45.203.242	10.45.203.243
254	10.45.203.244/30	10.45.203.245 – 10.45.203.246	10.45.203.247
255	10.45.203.248/30	10.45.203.249 – 10.45.203.250	10.45.203.251
256	10.45.203.252/30	10.45.203.253 – 10.45.203.254	10.45.203.255

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 →