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)10.2.176.0/20

network10.2.176.0/20

broadcast10.2.191.255

first host10.2.176.1

last host10.2.191.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.2.176.0/20

address00001010.00000010.10110000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.00000010.10110000.00000000

broadcast00001010.00000010.10111111.11111111

green = network part, grey = host part

hex0x0a02b000

decimal167948288

reverse dns0.176.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:b000

/20 split into /29 · 512 subnets

close ×

#	network	host range	broadcast
1	10.2.176.0/29	10.2.176.1 – 10.2.176.6	10.2.176.7
2	10.2.176.8/29	10.2.176.9 – 10.2.176.14	10.2.176.15
3	10.2.176.16/29	10.2.176.17 – 10.2.176.22	10.2.176.23
4	10.2.176.24/29	10.2.176.25 – 10.2.176.30	10.2.176.31
5	10.2.176.32/29	10.2.176.33 – 10.2.176.38	10.2.176.39
6	10.2.176.40/29	10.2.176.41 – 10.2.176.46	10.2.176.47
7	10.2.176.48/29	10.2.176.49 – 10.2.176.54	10.2.176.55
8	10.2.176.56/29	10.2.176.57 – 10.2.176.62	10.2.176.63
9	10.2.176.64/29	10.2.176.65 – 10.2.176.70	10.2.176.71
10	10.2.176.72/29	10.2.176.73 – 10.2.176.78	10.2.176.79
11	10.2.176.80/29	10.2.176.81 – 10.2.176.86	10.2.176.87
12	10.2.176.88/29	10.2.176.89 – 10.2.176.94	10.2.176.95
13	10.2.176.96/29	10.2.176.97 – 10.2.176.102	10.2.176.103
14	10.2.176.104/29	10.2.176.105 – 10.2.176.110	10.2.176.111
15	10.2.176.112/29	10.2.176.113 – 10.2.176.118	10.2.176.119
16	10.2.176.120/29	10.2.176.121 – 10.2.176.126	10.2.176.127
17	10.2.176.128/29	10.2.176.129 – 10.2.176.134	10.2.176.135
18	10.2.176.136/29	10.2.176.137 – 10.2.176.142	10.2.176.143
19	10.2.176.144/29	10.2.176.145 – 10.2.176.150	10.2.176.151
20	10.2.176.152/29	10.2.176.153 – 10.2.176.158	10.2.176.159
21	10.2.176.160/29	10.2.176.161 – 10.2.176.166	10.2.176.167
22	10.2.176.168/29	10.2.176.169 – 10.2.176.174	10.2.176.175
23	10.2.176.176/29	10.2.176.177 – 10.2.176.182	10.2.176.183
24	10.2.176.184/29	10.2.176.185 – 10.2.176.190	10.2.176.191
25	10.2.176.192/29	10.2.176.193 – 10.2.176.198	10.2.176.199
26	10.2.176.200/29	10.2.176.201 – 10.2.176.206	10.2.176.207
27	10.2.176.208/29	10.2.176.209 – 10.2.176.214	10.2.176.215
28	10.2.176.216/29	10.2.176.217 – 10.2.176.222	10.2.176.223
29	10.2.176.224/29	10.2.176.225 – 10.2.176.230	10.2.176.231
30	10.2.176.232/29	10.2.176.233 – 10.2.176.238	10.2.176.239
31	10.2.176.240/29	10.2.176.241 – 10.2.176.246	10.2.176.247
32	10.2.176.248/29	10.2.176.249 – 10.2.176.254	10.2.176.255
33	10.2.177.0/29	10.2.177.1 – 10.2.177.6	10.2.177.7
34	10.2.177.8/29	10.2.177.9 – 10.2.177.14	10.2.177.15
35	10.2.177.16/29	10.2.177.17 – 10.2.177.22	10.2.177.23
36	10.2.177.24/29	10.2.177.25 – 10.2.177.30	10.2.177.31
37	10.2.177.32/29	10.2.177.33 – 10.2.177.38	10.2.177.39
38	10.2.177.40/29	10.2.177.41 – 10.2.177.46	10.2.177.47
39	10.2.177.48/29	10.2.177.49 – 10.2.177.54	10.2.177.55
40	10.2.177.56/29	10.2.177.57 – 10.2.177.62	10.2.177.63
41	10.2.177.64/29	10.2.177.65 – 10.2.177.70	10.2.177.71
42	10.2.177.72/29	10.2.177.73 – 10.2.177.78	10.2.177.79
43	10.2.177.80/29	10.2.177.81 – 10.2.177.86	10.2.177.87
44	10.2.177.88/29	10.2.177.89 – 10.2.177.94	10.2.177.95
45	10.2.177.96/29	10.2.177.97 – 10.2.177.102	10.2.177.103
46	10.2.177.104/29	10.2.177.105 – 10.2.177.110	10.2.177.111
47	10.2.177.112/29	10.2.177.113 – 10.2.177.118	10.2.177.119
48	10.2.177.120/29	10.2.177.121 – 10.2.177.126	10.2.177.127
49	10.2.177.128/29	10.2.177.129 – 10.2.177.134	10.2.177.135
50	10.2.177.136/29	10.2.177.137 – 10.2.177.142	10.2.177.143
51	10.2.177.144/29	10.2.177.145 – 10.2.177.150	10.2.177.151
52	10.2.177.152/29	10.2.177.153 – 10.2.177.158	10.2.177.159
53	10.2.177.160/29	10.2.177.161 – 10.2.177.166	10.2.177.167
54	10.2.177.168/29	10.2.177.169 – 10.2.177.174	10.2.177.175
55	10.2.177.176/29	10.2.177.177 – 10.2.177.182	10.2.177.183
56	10.2.177.184/29	10.2.177.185 – 10.2.177.190	10.2.177.191
57	10.2.177.192/29	10.2.177.193 – 10.2.177.198	10.2.177.199
58	10.2.177.200/29	10.2.177.201 – 10.2.177.206	10.2.177.207
59	10.2.177.208/29	10.2.177.209 – 10.2.177.214	10.2.177.215
60	10.2.177.216/29	10.2.177.217 – 10.2.177.222	10.2.177.223
61	10.2.177.224/29	10.2.177.225 – 10.2.177.230	10.2.177.231
62	10.2.177.232/29	10.2.177.233 – 10.2.177.238	10.2.177.239
63	10.2.177.240/29	10.2.177.241 – 10.2.177.246	10.2.177.247
64	10.2.177.248/29	10.2.177.249 – 10.2.177.254	10.2.177.255
65	10.2.178.0/29	10.2.178.1 – 10.2.178.6	10.2.178.7
66	10.2.178.8/29	10.2.178.9 – 10.2.178.14	10.2.178.15
67	10.2.178.16/29	10.2.178.17 – 10.2.178.22	10.2.178.23
68	10.2.178.24/29	10.2.178.25 – 10.2.178.30	10.2.178.31
69	10.2.178.32/29	10.2.178.33 – 10.2.178.38	10.2.178.39
70	10.2.178.40/29	10.2.178.41 – 10.2.178.46	10.2.178.47
71	10.2.178.48/29	10.2.178.49 – 10.2.178.54	10.2.178.55
72	10.2.178.56/29	10.2.178.57 – 10.2.178.62	10.2.178.63
73	10.2.178.64/29	10.2.178.65 – 10.2.178.70	10.2.178.71
74	10.2.178.72/29	10.2.178.73 – 10.2.178.78	10.2.178.79
75	10.2.178.80/29	10.2.178.81 – 10.2.178.86	10.2.178.87
76	10.2.178.88/29	10.2.178.89 – 10.2.178.94	10.2.178.95
77	10.2.178.96/29	10.2.178.97 – 10.2.178.102	10.2.178.103
78	10.2.178.104/29	10.2.178.105 – 10.2.178.110	10.2.178.111
79	10.2.178.112/29	10.2.178.113 – 10.2.178.118	10.2.178.119
80	10.2.178.120/29	10.2.178.121 – 10.2.178.126	10.2.178.127
81	10.2.178.128/29	10.2.178.129 – 10.2.178.134	10.2.178.135
82	10.2.178.136/29	10.2.178.137 – 10.2.178.142	10.2.178.143
83	10.2.178.144/29	10.2.178.145 – 10.2.178.150	10.2.178.151
84	10.2.178.152/29	10.2.178.153 – 10.2.178.158	10.2.178.159
85	10.2.178.160/29	10.2.178.161 – 10.2.178.166	10.2.178.167
86	10.2.178.168/29	10.2.178.169 – 10.2.178.174	10.2.178.175
87	10.2.178.176/29	10.2.178.177 – 10.2.178.182	10.2.178.183
88	10.2.178.184/29	10.2.178.185 – 10.2.178.190	10.2.178.191
89	10.2.178.192/29	10.2.178.193 – 10.2.178.198	10.2.178.199
90	10.2.178.200/29	10.2.178.201 – 10.2.178.206	10.2.178.207
91	10.2.178.208/29	10.2.178.209 – 10.2.178.214	10.2.178.215
92	10.2.178.216/29	10.2.178.217 – 10.2.178.222	10.2.178.223
93	10.2.178.224/29	10.2.178.225 – 10.2.178.230	10.2.178.231
94	10.2.178.232/29	10.2.178.233 – 10.2.178.238	10.2.178.239
95	10.2.178.240/29	10.2.178.241 – 10.2.178.246	10.2.178.247
96	10.2.178.248/29	10.2.178.249 – 10.2.178.254	10.2.178.255
97	10.2.179.0/29	10.2.179.1 – 10.2.179.6	10.2.179.7
98	10.2.179.8/29	10.2.179.9 – 10.2.179.14	10.2.179.15
99	10.2.179.16/29	10.2.179.17 – 10.2.179.22	10.2.179.23
100	10.2.179.24/29	10.2.179.25 – 10.2.179.30	10.2.179.31
101	10.2.179.32/29	10.2.179.33 – 10.2.179.38	10.2.179.39
102	10.2.179.40/29	10.2.179.41 – 10.2.179.46	10.2.179.47
103	10.2.179.48/29	10.2.179.49 – 10.2.179.54	10.2.179.55
104	10.2.179.56/29	10.2.179.57 – 10.2.179.62	10.2.179.63
105	10.2.179.64/29	10.2.179.65 – 10.2.179.70	10.2.179.71
106	10.2.179.72/29	10.2.179.73 – 10.2.179.78	10.2.179.79
107	10.2.179.80/29	10.2.179.81 – 10.2.179.86	10.2.179.87
108	10.2.179.88/29	10.2.179.89 – 10.2.179.94	10.2.179.95
109	10.2.179.96/29	10.2.179.97 – 10.2.179.102	10.2.179.103
110	10.2.179.104/29	10.2.179.105 – 10.2.179.110	10.2.179.111
111	10.2.179.112/29	10.2.179.113 – 10.2.179.118	10.2.179.119
112	10.2.179.120/29	10.2.179.121 – 10.2.179.126	10.2.179.127
113	10.2.179.128/29	10.2.179.129 – 10.2.179.134	10.2.179.135
114	10.2.179.136/29	10.2.179.137 – 10.2.179.142	10.2.179.143
115	10.2.179.144/29	10.2.179.145 – 10.2.179.150	10.2.179.151
116	10.2.179.152/29	10.2.179.153 – 10.2.179.158	10.2.179.159
117	10.2.179.160/29	10.2.179.161 – 10.2.179.166	10.2.179.167
118	10.2.179.168/29	10.2.179.169 – 10.2.179.174	10.2.179.175
119	10.2.179.176/29	10.2.179.177 – 10.2.179.182	10.2.179.183
120	10.2.179.184/29	10.2.179.185 – 10.2.179.190	10.2.179.191
121	10.2.179.192/29	10.2.179.193 – 10.2.179.198	10.2.179.199
122	10.2.179.200/29	10.2.179.201 – 10.2.179.206	10.2.179.207
123	10.2.179.208/29	10.2.179.209 – 10.2.179.214	10.2.179.215
124	10.2.179.216/29	10.2.179.217 – 10.2.179.222	10.2.179.223
125	10.2.179.224/29	10.2.179.225 – 10.2.179.230	10.2.179.231
126	10.2.179.232/29	10.2.179.233 – 10.2.179.238	10.2.179.239
127	10.2.179.240/29	10.2.179.241 – 10.2.179.246	10.2.179.247
128	10.2.179.248/29	10.2.179.249 – 10.2.179.254	10.2.179.255
129	10.2.180.0/29	10.2.180.1 – 10.2.180.6	10.2.180.7
130	10.2.180.8/29	10.2.180.9 – 10.2.180.14	10.2.180.15
131	10.2.180.16/29	10.2.180.17 – 10.2.180.22	10.2.180.23
132	10.2.180.24/29	10.2.180.25 – 10.2.180.30	10.2.180.31
133	10.2.180.32/29	10.2.180.33 – 10.2.180.38	10.2.180.39
134	10.2.180.40/29	10.2.180.41 – 10.2.180.46	10.2.180.47
135	10.2.180.48/29	10.2.180.49 – 10.2.180.54	10.2.180.55
136	10.2.180.56/29	10.2.180.57 – 10.2.180.62	10.2.180.63
137	10.2.180.64/29	10.2.180.65 – 10.2.180.70	10.2.180.71
138	10.2.180.72/29	10.2.180.73 – 10.2.180.78	10.2.180.79
139	10.2.180.80/29	10.2.180.81 – 10.2.180.86	10.2.180.87
140	10.2.180.88/29	10.2.180.89 – 10.2.180.94	10.2.180.95
141	10.2.180.96/29	10.2.180.97 – 10.2.180.102	10.2.180.103
142	10.2.180.104/29	10.2.180.105 – 10.2.180.110	10.2.180.111
143	10.2.180.112/29	10.2.180.113 – 10.2.180.118	10.2.180.119
144	10.2.180.120/29	10.2.180.121 – 10.2.180.126	10.2.180.127
145	10.2.180.128/29	10.2.180.129 – 10.2.180.134	10.2.180.135
146	10.2.180.136/29	10.2.180.137 – 10.2.180.142	10.2.180.143
147	10.2.180.144/29	10.2.180.145 – 10.2.180.150	10.2.180.151
148	10.2.180.152/29	10.2.180.153 – 10.2.180.158	10.2.180.159
149	10.2.180.160/29	10.2.180.161 – 10.2.180.166	10.2.180.167
150	10.2.180.168/29	10.2.180.169 – 10.2.180.174	10.2.180.175
151	10.2.180.176/29	10.2.180.177 – 10.2.180.182	10.2.180.183
152	10.2.180.184/29	10.2.180.185 – 10.2.180.190	10.2.180.191
153	10.2.180.192/29	10.2.180.193 – 10.2.180.198	10.2.180.199
154	10.2.180.200/29	10.2.180.201 – 10.2.180.206	10.2.180.207
155	10.2.180.208/29	10.2.180.209 – 10.2.180.214	10.2.180.215
156	10.2.180.216/29	10.2.180.217 – 10.2.180.222	10.2.180.223
157	10.2.180.224/29	10.2.180.225 – 10.2.180.230	10.2.180.231
158	10.2.180.232/29	10.2.180.233 – 10.2.180.238	10.2.180.239
159	10.2.180.240/29	10.2.180.241 – 10.2.180.246	10.2.180.247
160	10.2.180.248/29	10.2.180.249 – 10.2.180.254	10.2.180.255
161	10.2.181.0/29	10.2.181.1 – 10.2.181.6	10.2.181.7
162	10.2.181.8/29	10.2.181.9 – 10.2.181.14	10.2.181.15
163	10.2.181.16/29	10.2.181.17 – 10.2.181.22	10.2.181.23
164	10.2.181.24/29	10.2.181.25 – 10.2.181.30	10.2.181.31
165	10.2.181.32/29	10.2.181.33 – 10.2.181.38	10.2.181.39
166	10.2.181.40/29	10.2.181.41 – 10.2.181.46	10.2.181.47
167	10.2.181.48/29	10.2.181.49 – 10.2.181.54	10.2.181.55
168	10.2.181.56/29	10.2.181.57 – 10.2.181.62	10.2.181.63
169	10.2.181.64/29	10.2.181.65 – 10.2.181.70	10.2.181.71
170	10.2.181.72/29	10.2.181.73 – 10.2.181.78	10.2.181.79
171	10.2.181.80/29	10.2.181.81 – 10.2.181.86	10.2.181.87
172	10.2.181.88/29	10.2.181.89 – 10.2.181.94	10.2.181.95
173	10.2.181.96/29	10.2.181.97 – 10.2.181.102	10.2.181.103
174	10.2.181.104/29	10.2.181.105 – 10.2.181.110	10.2.181.111
175	10.2.181.112/29	10.2.181.113 – 10.2.181.118	10.2.181.119
176	10.2.181.120/29	10.2.181.121 – 10.2.181.126	10.2.181.127
177	10.2.181.128/29	10.2.181.129 – 10.2.181.134	10.2.181.135
178	10.2.181.136/29	10.2.181.137 – 10.2.181.142	10.2.181.143
179	10.2.181.144/29	10.2.181.145 – 10.2.181.150	10.2.181.151
180	10.2.181.152/29	10.2.181.153 – 10.2.181.158	10.2.181.159
181	10.2.181.160/29	10.2.181.161 – 10.2.181.166	10.2.181.167
182	10.2.181.168/29	10.2.181.169 – 10.2.181.174	10.2.181.175
183	10.2.181.176/29	10.2.181.177 – 10.2.181.182	10.2.181.183
184	10.2.181.184/29	10.2.181.185 – 10.2.181.190	10.2.181.191
185	10.2.181.192/29	10.2.181.193 – 10.2.181.198	10.2.181.199
186	10.2.181.200/29	10.2.181.201 – 10.2.181.206	10.2.181.207
187	10.2.181.208/29	10.2.181.209 – 10.2.181.214	10.2.181.215
188	10.2.181.216/29	10.2.181.217 – 10.2.181.222	10.2.181.223
189	10.2.181.224/29	10.2.181.225 – 10.2.181.230	10.2.181.231
190	10.2.181.232/29	10.2.181.233 – 10.2.181.238	10.2.181.239
191	10.2.181.240/29	10.2.181.241 – 10.2.181.246	10.2.181.247
192	10.2.181.248/29	10.2.181.249 – 10.2.181.254	10.2.181.255
193	10.2.182.0/29	10.2.182.1 – 10.2.182.6	10.2.182.7
194	10.2.182.8/29	10.2.182.9 – 10.2.182.14	10.2.182.15
195	10.2.182.16/29	10.2.182.17 – 10.2.182.22	10.2.182.23
196	10.2.182.24/29	10.2.182.25 – 10.2.182.30	10.2.182.31
197	10.2.182.32/29	10.2.182.33 – 10.2.182.38	10.2.182.39
198	10.2.182.40/29	10.2.182.41 – 10.2.182.46	10.2.182.47
199	10.2.182.48/29	10.2.182.49 – 10.2.182.54	10.2.182.55
200	10.2.182.56/29	10.2.182.57 – 10.2.182.62	10.2.182.63
201	10.2.182.64/29	10.2.182.65 – 10.2.182.70	10.2.182.71
202	10.2.182.72/29	10.2.182.73 – 10.2.182.78	10.2.182.79
203	10.2.182.80/29	10.2.182.81 – 10.2.182.86	10.2.182.87
204	10.2.182.88/29	10.2.182.89 – 10.2.182.94	10.2.182.95
205	10.2.182.96/29	10.2.182.97 – 10.2.182.102	10.2.182.103
206	10.2.182.104/29	10.2.182.105 – 10.2.182.110	10.2.182.111
207	10.2.182.112/29	10.2.182.113 – 10.2.182.118	10.2.182.119
208	10.2.182.120/29	10.2.182.121 – 10.2.182.126	10.2.182.127
209	10.2.182.128/29	10.2.182.129 – 10.2.182.134	10.2.182.135
210	10.2.182.136/29	10.2.182.137 – 10.2.182.142	10.2.182.143
211	10.2.182.144/29	10.2.182.145 – 10.2.182.150	10.2.182.151
212	10.2.182.152/29	10.2.182.153 – 10.2.182.158	10.2.182.159
213	10.2.182.160/29	10.2.182.161 – 10.2.182.166	10.2.182.167
214	10.2.182.168/29	10.2.182.169 – 10.2.182.174	10.2.182.175
215	10.2.182.176/29	10.2.182.177 – 10.2.182.182	10.2.182.183
216	10.2.182.184/29	10.2.182.185 – 10.2.182.190	10.2.182.191
217	10.2.182.192/29	10.2.182.193 – 10.2.182.198	10.2.182.199
218	10.2.182.200/29	10.2.182.201 – 10.2.182.206	10.2.182.207
219	10.2.182.208/29	10.2.182.209 – 10.2.182.214	10.2.182.215
220	10.2.182.216/29	10.2.182.217 – 10.2.182.222	10.2.182.223
221	10.2.182.224/29	10.2.182.225 – 10.2.182.230	10.2.182.231
222	10.2.182.232/29	10.2.182.233 – 10.2.182.238	10.2.182.239
223	10.2.182.240/29	10.2.182.241 – 10.2.182.246	10.2.182.247
224	10.2.182.248/29	10.2.182.249 – 10.2.182.254	10.2.182.255
225	10.2.183.0/29	10.2.183.1 – 10.2.183.6	10.2.183.7
226	10.2.183.8/29	10.2.183.9 – 10.2.183.14	10.2.183.15
227	10.2.183.16/29	10.2.183.17 – 10.2.183.22	10.2.183.23
228	10.2.183.24/29	10.2.183.25 – 10.2.183.30	10.2.183.31
229	10.2.183.32/29	10.2.183.33 – 10.2.183.38	10.2.183.39
230	10.2.183.40/29	10.2.183.41 – 10.2.183.46	10.2.183.47
231	10.2.183.48/29	10.2.183.49 – 10.2.183.54	10.2.183.55
232	10.2.183.56/29	10.2.183.57 – 10.2.183.62	10.2.183.63
233	10.2.183.64/29	10.2.183.65 – 10.2.183.70	10.2.183.71
234	10.2.183.72/29	10.2.183.73 – 10.2.183.78	10.2.183.79
235	10.2.183.80/29	10.2.183.81 – 10.2.183.86	10.2.183.87
236	10.2.183.88/29	10.2.183.89 – 10.2.183.94	10.2.183.95
237	10.2.183.96/29	10.2.183.97 – 10.2.183.102	10.2.183.103
238	10.2.183.104/29	10.2.183.105 – 10.2.183.110	10.2.183.111
239	10.2.183.112/29	10.2.183.113 – 10.2.183.118	10.2.183.119
240	10.2.183.120/29	10.2.183.121 – 10.2.183.126	10.2.183.127
241	10.2.183.128/29	10.2.183.129 – 10.2.183.134	10.2.183.135
242	10.2.183.136/29	10.2.183.137 – 10.2.183.142	10.2.183.143
243	10.2.183.144/29	10.2.183.145 – 10.2.183.150	10.2.183.151
244	10.2.183.152/29	10.2.183.153 – 10.2.183.158	10.2.183.159
245	10.2.183.160/29	10.2.183.161 – 10.2.183.166	10.2.183.167
246	10.2.183.168/29	10.2.183.169 – 10.2.183.174	10.2.183.175
247	10.2.183.176/29	10.2.183.177 – 10.2.183.182	10.2.183.183
248	10.2.183.184/29	10.2.183.185 – 10.2.183.190	10.2.183.191
249	10.2.183.192/29	10.2.183.193 – 10.2.183.198	10.2.183.199
250	10.2.183.200/29	10.2.183.201 – 10.2.183.206	10.2.183.207
251	10.2.183.208/29	10.2.183.209 – 10.2.183.214	10.2.183.215
252	10.2.183.216/29	10.2.183.217 – 10.2.183.222	10.2.183.223
253	10.2.183.224/29	10.2.183.225 – 10.2.183.230	10.2.183.231
254	10.2.183.232/29	10.2.183.233 – 10.2.183.238	10.2.183.239
255	10.2.183.240/29	10.2.183.241 – 10.2.183.246	10.2.183.247
256	10.2.183.248/29	10.2.183.249 – 10.2.183.254	10.2.183.255

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 →