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)10.78.176.0/20

network10.78.176.0/20

broadcast10.78.191.255

first host10.78.176.1

last host10.78.191.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.78.176.0/20

address00001010.01001110.10110000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.01001110.10110000.00000000

broadcast00001010.01001110.10111111.11111111

green = network part, grey = host part

hex0x0a4eb000

decimal172929024

reverse dns0.176.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:b000

/20 split into /29 · 512 subnets

close ×

#	network	host range	broadcast
1	10.78.176.0/29	10.78.176.1 – 10.78.176.6	10.78.176.7
2	10.78.176.8/29	10.78.176.9 – 10.78.176.14	10.78.176.15
3	10.78.176.16/29	10.78.176.17 – 10.78.176.22	10.78.176.23
4	10.78.176.24/29	10.78.176.25 – 10.78.176.30	10.78.176.31
5	10.78.176.32/29	10.78.176.33 – 10.78.176.38	10.78.176.39
6	10.78.176.40/29	10.78.176.41 – 10.78.176.46	10.78.176.47
7	10.78.176.48/29	10.78.176.49 – 10.78.176.54	10.78.176.55
8	10.78.176.56/29	10.78.176.57 – 10.78.176.62	10.78.176.63
9	10.78.176.64/29	10.78.176.65 – 10.78.176.70	10.78.176.71
10	10.78.176.72/29	10.78.176.73 – 10.78.176.78	10.78.176.79
11	10.78.176.80/29	10.78.176.81 – 10.78.176.86	10.78.176.87
12	10.78.176.88/29	10.78.176.89 – 10.78.176.94	10.78.176.95
13	10.78.176.96/29	10.78.176.97 – 10.78.176.102	10.78.176.103
14	10.78.176.104/29	10.78.176.105 – 10.78.176.110	10.78.176.111
15	10.78.176.112/29	10.78.176.113 – 10.78.176.118	10.78.176.119
16	10.78.176.120/29	10.78.176.121 – 10.78.176.126	10.78.176.127
17	10.78.176.128/29	10.78.176.129 – 10.78.176.134	10.78.176.135
18	10.78.176.136/29	10.78.176.137 – 10.78.176.142	10.78.176.143
19	10.78.176.144/29	10.78.176.145 – 10.78.176.150	10.78.176.151
20	10.78.176.152/29	10.78.176.153 – 10.78.176.158	10.78.176.159
21	10.78.176.160/29	10.78.176.161 – 10.78.176.166	10.78.176.167
22	10.78.176.168/29	10.78.176.169 – 10.78.176.174	10.78.176.175
23	10.78.176.176/29	10.78.176.177 – 10.78.176.182	10.78.176.183
24	10.78.176.184/29	10.78.176.185 – 10.78.176.190	10.78.176.191
25	10.78.176.192/29	10.78.176.193 – 10.78.176.198	10.78.176.199
26	10.78.176.200/29	10.78.176.201 – 10.78.176.206	10.78.176.207
27	10.78.176.208/29	10.78.176.209 – 10.78.176.214	10.78.176.215
28	10.78.176.216/29	10.78.176.217 – 10.78.176.222	10.78.176.223
29	10.78.176.224/29	10.78.176.225 – 10.78.176.230	10.78.176.231
30	10.78.176.232/29	10.78.176.233 – 10.78.176.238	10.78.176.239
31	10.78.176.240/29	10.78.176.241 – 10.78.176.246	10.78.176.247
32	10.78.176.248/29	10.78.176.249 – 10.78.176.254	10.78.176.255
33	10.78.177.0/29	10.78.177.1 – 10.78.177.6	10.78.177.7
34	10.78.177.8/29	10.78.177.9 – 10.78.177.14	10.78.177.15
35	10.78.177.16/29	10.78.177.17 – 10.78.177.22	10.78.177.23
36	10.78.177.24/29	10.78.177.25 – 10.78.177.30	10.78.177.31
37	10.78.177.32/29	10.78.177.33 – 10.78.177.38	10.78.177.39
38	10.78.177.40/29	10.78.177.41 – 10.78.177.46	10.78.177.47
39	10.78.177.48/29	10.78.177.49 – 10.78.177.54	10.78.177.55
40	10.78.177.56/29	10.78.177.57 – 10.78.177.62	10.78.177.63
41	10.78.177.64/29	10.78.177.65 – 10.78.177.70	10.78.177.71
42	10.78.177.72/29	10.78.177.73 – 10.78.177.78	10.78.177.79
43	10.78.177.80/29	10.78.177.81 – 10.78.177.86	10.78.177.87
44	10.78.177.88/29	10.78.177.89 – 10.78.177.94	10.78.177.95
45	10.78.177.96/29	10.78.177.97 – 10.78.177.102	10.78.177.103
46	10.78.177.104/29	10.78.177.105 – 10.78.177.110	10.78.177.111
47	10.78.177.112/29	10.78.177.113 – 10.78.177.118	10.78.177.119
48	10.78.177.120/29	10.78.177.121 – 10.78.177.126	10.78.177.127
49	10.78.177.128/29	10.78.177.129 – 10.78.177.134	10.78.177.135
50	10.78.177.136/29	10.78.177.137 – 10.78.177.142	10.78.177.143
51	10.78.177.144/29	10.78.177.145 – 10.78.177.150	10.78.177.151
52	10.78.177.152/29	10.78.177.153 – 10.78.177.158	10.78.177.159
53	10.78.177.160/29	10.78.177.161 – 10.78.177.166	10.78.177.167
54	10.78.177.168/29	10.78.177.169 – 10.78.177.174	10.78.177.175
55	10.78.177.176/29	10.78.177.177 – 10.78.177.182	10.78.177.183
56	10.78.177.184/29	10.78.177.185 – 10.78.177.190	10.78.177.191
57	10.78.177.192/29	10.78.177.193 – 10.78.177.198	10.78.177.199
58	10.78.177.200/29	10.78.177.201 – 10.78.177.206	10.78.177.207
59	10.78.177.208/29	10.78.177.209 – 10.78.177.214	10.78.177.215
60	10.78.177.216/29	10.78.177.217 – 10.78.177.222	10.78.177.223
61	10.78.177.224/29	10.78.177.225 – 10.78.177.230	10.78.177.231
62	10.78.177.232/29	10.78.177.233 – 10.78.177.238	10.78.177.239
63	10.78.177.240/29	10.78.177.241 – 10.78.177.246	10.78.177.247
64	10.78.177.248/29	10.78.177.249 – 10.78.177.254	10.78.177.255
65	10.78.178.0/29	10.78.178.1 – 10.78.178.6	10.78.178.7
66	10.78.178.8/29	10.78.178.9 – 10.78.178.14	10.78.178.15
67	10.78.178.16/29	10.78.178.17 – 10.78.178.22	10.78.178.23
68	10.78.178.24/29	10.78.178.25 – 10.78.178.30	10.78.178.31
69	10.78.178.32/29	10.78.178.33 – 10.78.178.38	10.78.178.39
70	10.78.178.40/29	10.78.178.41 – 10.78.178.46	10.78.178.47
71	10.78.178.48/29	10.78.178.49 – 10.78.178.54	10.78.178.55
72	10.78.178.56/29	10.78.178.57 – 10.78.178.62	10.78.178.63
73	10.78.178.64/29	10.78.178.65 – 10.78.178.70	10.78.178.71
74	10.78.178.72/29	10.78.178.73 – 10.78.178.78	10.78.178.79
75	10.78.178.80/29	10.78.178.81 – 10.78.178.86	10.78.178.87
76	10.78.178.88/29	10.78.178.89 – 10.78.178.94	10.78.178.95
77	10.78.178.96/29	10.78.178.97 – 10.78.178.102	10.78.178.103
78	10.78.178.104/29	10.78.178.105 – 10.78.178.110	10.78.178.111
79	10.78.178.112/29	10.78.178.113 – 10.78.178.118	10.78.178.119
80	10.78.178.120/29	10.78.178.121 – 10.78.178.126	10.78.178.127
81	10.78.178.128/29	10.78.178.129 – 10.78.178.134	10.78.178.135
82	10.78.178.136/29	10.78.178.137 – 10.78.178.142	10.78.178.143
83	10.78.178.144/29	10.78.178.145 – 10.78.178.150	10.78.178.151
84	10.78.178.152/29	10.78.178.153 – 10.78.178.158	10.78.178.159
85	10.78.178.160/29	10.78.178.161 – 10.78.178.166	10.78.178.167
86	10.78.178.168/29	10.78.178.169 – 10.78.178.174	10.78.178.175
87	10.78.178.176/29	10.78.178.177 – 10.78.178.182	10.78.178.183
88	10.78.178.184/29	10.78.178.185 – 10.78.178.190	10.78.178.191
89	10.78.178.192/29	10.78.178.193 – 10.78.178.198	10.78.178.199
90	10.78.178.200/29	10.78.178.201 – 10.78.178.206	10.78.178.207
91	10.78.178.208/29	10.78.178.209 – 10.78.178.214	10.78.178.215
92	10.78.178.216/29	10.78.178.217 – 10.78.178.222	10.78.178.223
93	10.78.178.224/29	10.78.178.225 – 10.78.178.230	10.78.178.231
94	10.78.178.232/29	10.78.178.233 – 10.78.178.238	10.78.178.239
95	10.78.178.240/29	10.78.178.241 – 10.78.178.246	10.78.178.247
96	10.78.178.248/29	10.78.178.249 – 10.78.178.254	10.78.178.255
97	10.78.179.0/29	10.78.179.1 – 10.78.179.6	10.78.179.7
98	10.78.179.8/29	10.78.179.9 – 10.78.179.14	10.78.179.15
99	10.78.179.16/29	10.78.179.17 – 10.78.179.22	10.78.179.23
100	10.78.179.24/29	10.78.179.25 – 10.78.179.30	10.78.179.31
101	10.78.179.32/29	10.78.179.33 – 10.78.179.38	10.78.179.39
102	10.78.179.40/29	10.78.179.41 – 10.78.179.46	10.78.179.47
103	10.78.179.48/29	10.78.179.49 – 10.78.179.54	10.78.179.55
104	10.78.179.56/29	10.78.179.57 – 10.78.179.62	10.78.179.63
105	10.78.179.64/29	10.78.179.65 – 10.78.179.70	10.78.179.71
106	10.78.179.72/29	10.78.179.73 – 10.78.179.78	10.78.179.79
107	10.78.179.80/29	10.78.179.81 – 10.78.179.86	10.78.179.87
108	10.78.179.88/29	10.78.179.89 – 10.78.179.94	10.78.179.95
109	10.78.179.96/29	10.78.179.97 – 10.78.179.102	10.78.179.103
110	10.78.179.104/29	10.78.179.105 – 10.78.179.110	10.78.179.111
111	10.78.179.112/29	10.78.179.113 – 10.78.179.118	10.78.179.119
112	10.78.179.120/29	10.78.179.121 – 10.78.179.126	10.78.179.127
113	10.78.179.128/29	10.78.179.129 – 10.78.179.134	10.78.179.135
114	10.78.179.136/29	10.78.179.137 – 10.78.179.142	10.78.179.143
115	10.78.179.144/29	10.78.179.145 – 10.78.179.150	10.78.179.151
116	10.78.179.152/29	10.78.179.153 – 10.78.179.158	10.78.179.159
117	10.78.179.160/29	10.78.179.161 – 10.78.179.166	10.78.179.167
118	10.78.179.168/29	10.78.179.169 – 10.78.179.174	10.78.179.175
119	10.78.179.176/29	10.78.179.177 – 10.78.179.182	10.78.179.183
120	10.78.179.184/29	10.78.179.185 – 10.78.179.190	10.78.179.191
121	10.78.179.192/29	10.78.179.193 – 10.78.179.198	10.78.179.199
122	10.78.179.200/29	10.78.179.201 – 10.78.179.206	10.78.179.207
123	10.78.179.208/29	10.78.179.209 – 10.78.179.214	10.78.179.215
124	10.78.179.216/29	10.78.179.217 – 10.78.179.222	10.78.179.223
125	10.78.179.224/29	10.78.179.225 – 10.78.179.230	10.78.179.231
126	10.78.179.232/29	10.78.179.233 – 10.78.179.238	10.78.179.239
127	10.78.179.240/29	10.78.179.241 – 10.78.179.246	10.78.179.247
128	10.78.179.248/29	10.78.179.249 – 10.78.179.254	10.78.179.255
129	10.78.180.0/29	10.78.180.1 – 10.78.180.6	10.78.180.7
130	10.78.180.8/29	10.78.180.9 – 10.78.180.14	10.78.180.15
131	10.78.180.16/29	10.78.180.17 – 10.78.180.22	10.78.180.23
132	10.78.180.24/29	10.78.180.25 – 10.78.180.30	10.78.180.31
133	10.78.180.32/29	10.78.180.33 – 10.78.180.38	10.78.180.39
134	10.78.180.40/29	10.78.180.41 – 10.78.180.46	10.78.180.47
135	10.78.180.48/29	10.78.180.49 – 10.78.180.54	10.78.180.55
136	10.78.180.56/29	10.78.180.57 – 10.78.180.62	10.78.180.63
137	10.78.180.64/29	10.78.180.65 – 10.78.180.70	10.78.180.71
138	10.78.180.72/29	10.78.180.73 – 10.78.180.78	10.78.180.79
139	10.78.180.80/29	10.78.180.81 – 10.78.180.86	10.78.180.87
140	10.78.180.88/29	10.78.180.89 – 10.78.180.94	10.78.180.95
141	10.78.180.96/29	10.78.180.97 – 10.78.180.102	10.78.180.103
142	10.78.180.104/29	10.78.180.105 – 10.78.180.110	10.78.180.111
143	10.78.180.112/29	10.78.180.113 – 10.78.180.118	10.78.180.119
144	10.78.180.120/29	10.78.180.121 – 10.78.180.126	10.78.180.127
145	10.78.180.128/29	10.78.180.129 – 10.78.180.134	10.78.180.135
146	10.78.180.136/29	10.78.180.137 – 10.78.180.142	10.78.180.143
147	10.78.180.144/29	10.78.180.145 – 10.78.180.150	10.78.180.151
148	10.78.180.152/29	10.78.180.153 – 10.78.180.158	10.78.180.159
149	10.78.180.160/29	10.78.180.161 – 10.78.180.166	10.78.180.167
150	10.78.180.168/29	10.78.180.169 – 10.78.180.174	10.78.180.175
151	10.78.180.176/29	10.78.180.177 – 10.78.180.182	10.78.180.183
152	10.78.180.184/29	10.78.180.185 – 10.78.180.190	10.78.180.191
153	10.78.180.192/29	10.78.180.193 – 10.78.180.198	10.78.180.199
154	10.78.180.200/29	10.78.180.201 – 10.78.180.206	10.78.180.207
155	10.78.180.208/29	10.78.180.209 – 10.78.180.214	10.78.180.215
156	10.78.180.216/29	10.78.180.217 – 10.78.180.222	10.78.180.223
157	10.78.180.224/29	10.78.180.225 – 10.78.180.230	10.78.180.231
158	10.78.180.232/29	10.78.180.233 – 10.78.180.238	10.78.180.239
159	10.78.180.240/29	10.78.180.241 – 10.78.180.246	10.78.180.247
160	10.78.180.248/29	10.78.180.249 – 10.78.180.254	10.78.180.255
161	10.78.181.0/29	10.78.181.1 – 10.78.181.6	10.78.181.7
162	10.78.181.8/29	10.78.181.9 – 10.78.181.14	10.78.181.15
163	10.78.181.16/29	10.78.181.17 – 10.78.181.22	10.78.181.23
164	10.78.181.24/29	10.78.181.25 – 10.78.181.30	10.78.181.31
165	10.78.181.32/29	10.78.181.33 – 10.78.181.38	10.78.181.39
166	10.78.181.40/29	10.78.181.41 – 10.78.181.46	10.78.181.47
167	10.78.181.48/29	10.78.181.49 – 10.78.181.54	10.78.181.55
168	10.78.181.56/29	10.78.181.57 – 10.78.181.62	10.78.181.63
169	10.78.181.64/29	10.78.181.65 – 10.78.181.70	10.78.181.71
170	10.78.181.72/29	10.78.181.73 – 10.78.181.78	10.78.181.79
171	10.78.181.80/29	10.78.181.81 – 10.78.181.86	10.78.181.87
172	10.78.181.88/29	10.78.181.89 – 10.78.181.94	10.78.181.95
173	10.78.181.96/29	10.78.181.97 – 10.78.181.102	10.78.181.103
174	10.78.181.104/29	10.78.181.105 – 10.78.181.110	10.78.181.111
175	10.78.181.112/29	10.78.181.113 – 10.78.181.118	10.78.181.119
176	10.78.181.120/29	10.78.181.121 – 10.78.181.126	10.78.181.127
177	10.78.181.128/29	10.78.181.129 – 10.78.181.134	10.78.181.135
178	10.78.181.136/29	10.78.181.137 – 10.78.181.142	10.78.181.143
179	10.78.181.144/29	10.78.181.145 – 10.78.181.150	10.78.181.151
180	10.78.181.152/29	10.78.181.153 – 10.78.181.158	10.78.181.159
181	10.78.181.160/29	10.78.181.161 – 10.78.181.166	10.78.181.167
182	10.78.181.168/29	10.78.181.169 – 10.78.181.174	10.78.181.175
183	10.78.181.176/29	10.78.181.177 – 10.78.181.182	10.78.181.183
184	10.78.181.184/29	10.78.181.185 – 10.78.181.190	10.78.181.191
185	10.78.181.192/29	10.78.181.193 – 10.78.181.198	10.78.181.199
186	10.78.181.200/29	10.78.181.201 – 10.78.181.206	10.78.181.207
187	10.78.181.208/29	10.78.181.209 – 10.78.181.214	10.78.181.215
188	10.78.181.216/29	10.78.181.217 – 10.78.181.222	10.78.181.223
189	10.78.181.224/29	10.78.181.225 – 10.78.181.230	10.78.181.231
190	10.78.181.232/29	10.78.181.233 – 10.78.181.238	10.78.181.239
191	10.78.181.240/29	10.78.181.241 – 10.78.181.246	10.78.181.247
192	10.78.181.248/29	10.78.181.249 – 10.78.181.254	10.78.181.255
193	10.78.182.0/29	10.78.182.1 – 10.78.182.6	10.78.182.7
194	10.78.182.8/29	10.78.182.9 – 10.78.182.14	10.78.182.15
195	10.78.182.16/29	10.78.182.17 – 10.78.182.22	10.78.182.23
196	10.78.182.24/29	10.78.182.25 – 10.78.182.30	10.78.182.31
197	10.78.182.32/29	10.78.182.33 – 10.78.182.38	10.78.182.39
198	10.78.182.40/29	10.78.182.41 – 10.78.182.46	10.78.182.47
199	10.78.182.48/29	10.78.182.49 – 10.78.182.54	10.78.182.55
200	10.78.182.56/29	10.78.182.57 – 10.78.182.62	10.78.182.63
201	10.78.182.64/29	10.78.182.65 – 10.78.182.70	10.78.182.71
202	10.78.182.72/29	10.78.182.73 – 10.78.182.78	10.78.182.79
203	10.78.182.80/29	10.78.182.81 – 10.78.182.86	10.78.182.87
204	10.78.182.88/29	10.78.182.89 – 10.78.182.94	10.78.182.95
205	10.78.182.96/29	10.78.182.97 – 10.78.182.102	10.78.182.103
206	10.78.182.104/29	10.78.182.105 – 10.78.182.110	10.78.182.111
207	10.78.182.112/29	10.78.182.113 – 10.78.182.118	10.78.182.119
208	10.78.182.120/29	10.78.182.121 – 10.78.182.126	10.78.182.127
209	10.78.182.128/29	10.78.182.129 – 10.78.182.134	10.78.182.135
210	10.78.182.136/29	10.78.182.137 – 10.78.182.142	10.78.182.143
211	10.78.182.144/29	10.78.182.145 – 10.78.182.150	10.78.182.151
212	10.78.182.152/29	10.78.182.153 – 10.78.182.158	10.78.182.159
213	10.78.182.160/29	10.78.182.161 – 10.78.182.166	10.78.182.167
214	10.78.182.168/29	10.78.182.169 – 10.78.182.174	10.78.182.175
215	10.78.182.176/29	10.78.182.177 – 10.78.182.182	10.78.182.183
216	10.78.182.184/29	10.78.182.185 – 10.78.182.190	10.78.182.191
217	10.78.182.192/29	10.78.182.193 – 10.78.182.198	10.78.182.199
218	10.78.182.200/29	10.78.182.201 – 10.78.182.206	10.78.182.207
219	10.78.182.208/29	10.78.182.209 – 10.78.182.214	10.78.182.215
220	10.78.182.216/29	10.78.182.217 – 10.78.182.222	10.78.182.223
221	10.78.182.224/29	10.78.182.225 – 10.78.182.230	10.78.182.231
222	10.78.182.232/29	10.78.182.233 – 10.78.182.238	10.78.182.239
223	10.78.182.240/29	10.78.182.241 – 10.78.182.246	10.78.182.247
224	10.78.182.248/29	10.78.182.249 – 10.78.182.254	10.78.182.255
225	10.78.183.0/29	10.78.183.1 – 10.78.183.6	10.78.183.7
226	10.78.183.8/29	10.78.183.9 – 10.78.183.14	10.78.183.15
227	10.78.183.16/29	10.78.183.17 – 10.78.183.22	10.78.183.23
228	10.78.183.24/29	10.78.183.25 – 10.78.183.30	10.78.183.31
229	10.78.183.32/29	10.78.183.33 – 10.78.183.38	10.78.183.39
230	10.78.183.40/29	10.78.183.41 – 10.78.183.46	10.78.183.47
231	10.78.183.48/29	10.78.183.49 – 10.78.183.54	10.78.183.55
232	10.78.183.56/29	10.78.183.57 – 10.78.183.62	10.78.183.63
233	10.78.183.64/29	10.78.183.65 – 10.78.183.70	10.78.183.71
234	10.78.183.72/29	10.78.183.73 – 10.78.183.78	10.78.183.79
235	10.78.183.80/29	10.78.183.81 – 10.78.183.86	10.78.183.87
236	10.78.183.88/29	10.78.183.89 – 10.78.183.94	10.78.183.95
237	10.78.183.96/29	10.78.183.97 – 10.78.183.102	10.78.183.103
238	10.78.183.104/29	10.78.183.105 – 10.78.183.110	10.78.183.111
239	10.78.183.112/29	10.78.183.113 – 10.78.183.118	10.78.183.119
240	10.78.183.120/29	10.78.183.121 – 10.78.183.126	10.78.183.127
241	10.78.183.128/29	10.78.183.129 – 10.78.183.134	10.78.183.135
242	10.78.183.136/29	10.78.183.137 – 10.78.183.142	10.78.183.143
243	10.78.183.144/29	10.78.183.145 – 10.78.183.150	10.78.183.151
244	10.78.183.152/29	10.78.183.153 – 10.78.183.158	10.78.183.159
245	10.78.183.160/29	10.78.183.161 – 10.78.183.166	10.78.183.167
246	10.78.183.168/29	10.78.183.169 – 10.78.183.174	10.78.183.175
247	10.78.183.176/29	10.78.183.177 – 10.78.183.182	10.78.183.183
248	10.78.183.184/29	10.78.183.185 – 10.78.183.190	10.78.183.191
249	10.78.183.192/29	10.78.183.193 – 10.78.183.198	10.78.183.199
250	10.78.183.200/29	10.78.183.201 – 10.78.183.206	10.78.183.207
251	10.78.183.208/29	10.78.183.209 – 10.78.183.214	10.78.183.215
252	10.78.183.216/29	10.78.183.217 – 10.78.183.222	10.78.183.223
253	10.78.183.224/29	10.78.183.225 – 10.78.183.230	10.78.183.231
254	10.78.183.232/29	10.78.183.233 – 10.78.183.238	10.78.183.239
255	10.78.183.240/29	10.78.183.241 – 10.78.183.246	10.78.183.247
256	10.78.183.248/29	10.78.183.249 – 10.78.183.254	10.78.183.255

showing 256 of 512

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 /20
/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	1
/21	255.255.248.0	2,048	2,046	2 split →
/22	255.255.252.0	1,024	1,022	4 split →
/23	255.255.254.0	512	510	8 split →
/24	255.255.255.0	256	254	16 split →
/25	255.255.255.128	128	126	32 split →
/26	255.255.255.192	64	62	64 split →
/27	255.255.255.224	32	30	128 split →
/28	255.255.255.240	16	14	256 split →
/29	255.255.255.248	8	6	512 split →
/30	255.255.255.252	4	2	1,024 split →
/31	255.255.255.254	2	2	2,048 split →
/32	255.255.255.255	1	1	4,096 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 →