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)10.5.224.0/20

network10.5.224.0/20

broadcast10.5.239.255

first host10.5.224.1

last host10.5.239.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.5.224.0/20

address00001010.00000101.11100000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.00000101.11100000.00000000

broadcast00001010.00000101.11101111.11111111

green = network part, grey = host part

hex0x0a05e000

decimal168157184

reverse dns0.224.5.10.in-addr.arpa

ipv4-mapped::ffff:a05:e000

/20 split into /29 · 512 subnets

close ×

#	network	host range	broadcast
1	10.5.224.0/29	10.5.224.1 – 10.5.224.6	10.5.224.7
2	10.5.224.8/29	10.5.224.9 – 10.5.224.14	10.5.224.15
3	10.5.224.16/29	10.5.224.17 – 10.5.224.22	10.5.224.23
4	10.5.224.24/29	10.5.224.25 – 10.5.224.30	10.5.224.31
5	10.5.224.32/29	10.5.224.33 – 10.5.224.38	10.5.224.39
6	10.5.224.40/29	10.5.224.41 – 10.5.224.46	10.5.224.47
7	10.5.224.48/29	10.5.224.49 – 10.5.224.54	10.5.224.55
8	10.5.224.56/29	10.5.224.57 – 10.5.224.62	10.5.224.63
9	10.5.224.64/29	10.5.224.65 – 10.5.224.70	10.5.224.71
10	10.5.224.72/29	10.5.224.73 – 10.5.224.78	10.5.224.79
11	10.5.224.80/29	10.5.224.81 – 10.5.224.86	10.5.224.87
12	10.5.224.88/29	10.5.224.89 – 10.5.224.94	10.5.224.95
13	10.5.224.96/29	10.5.224.97 – 10.5.224.102	10.5.224.103
14	10.5.224.104/29	10.5.224.105 – 10.5.224.110	10.5.224.111
15	10.5.224.112/29	10.5.224.113 – 10.5.224.118	10.5.224.119
16	10.5.224.120/29	10.5.224.121 – 10.5.224.126	10.5.224.127
17	10.5.224.128/29	10.5.224.129 – 10.5.224.134	10.5.224.135
18	10.5.224.136/29	10.5.224.137 – 10.5.224.142	10.5.224.143
19	10.5.224.144/29	10.5.224.145 – 10.5.224.150	10.5.224.151
20	10.5.224.152/29	10.5.224.153 – 10.5.224.158	10.5.224.159
21	10.5.224.160/29	10.5.224.161 – 10.5.224.166	10.5.224.167
22	10.5.224.168/29	10.5.224.169 – 10.5.224.174	10.5.224.175
23	10.5.224.176/29	10.5.224.177 – 10.5.224.182	10.5.224.183
24	10.5.224.184/29	10.5.224.185 – 10.5.224.190	10.5.224.191
25	10.5.224.192/29	10.5.224.193 – 10.5.224.198	10.5.224.199
26	10.5.224.200/29	10.5.224.201 – 10.5.224.206	10.5.224.207
27	10.5.224.208/29	10.5.224.209 – 10.5.224.214	10.5.224.215
28	10.5.224.216/29	10.5.224.217 – 10.5.224.222	10.5.224.223
29	10.5.224.224/29	10.5.224.225 – 10.5.224.230	10.5.224.231
30	10.5.224.232/29	10.5.224.233 – 10.5.224.238	10.5.224.239
31	10.5.224.240/29	10.5.224.241 – 10.5.224.246	10.5.224.247
32	10.5.224.248/29	10.5.224.249 – 10.5.224.254	10.5.224.255
33	10.5.225.0/29	10.5.225.1 – 10.5.225.6	10.5.225.7
34	10.5.225.8/29	10.5.225.9 – 10.5.225.14	10.5.225.15
35	10.5.225.16/29	10.5.225.17 – 10.5.225.22	10.5.225.23
36	10.5.225.24/29	10.5.225.25 – 10.5.225.30	10.5.225.31
37	10.5.225.32/29	10.5.225.33 – 10.5.225.38	10.5.225.39
38	10.5.225.40/29	10.5.225.41 – 10.5.225.46	10.5.225.47
39	10.5.225.48/29	10.5.225.49 – 10.5.225.54	10.5.225.55
40	10.5.225.56/29	10.5.225.57 – 10.5.225.62	10.5.225.63
41	10.5.225.64/29	10.5.225.65 – 10.5.225.70	10.5.225.71
42	10.5.225.72/29	10.5.225.73 – 10.5.225.78	10.5.225.79
43	10.5.225.80/29	10.5.225.81 – 10.5.225.86	10.5.225.87
44	10.5.225.88/29	10.5.225.89 – 10.5.225.94	10.5.225.95
45	10.5.225.96/29	10.5.225.97 – 10.5.225.102	10.5.225.103
46	10.5.225.104/29	10.5.225.105 – 10.5.225.110	10.5.225.111
47	10.5.225.112/29	10.5.225.113 – 10.5.225.118	10.5.225.119
48	10.5.225.120/29	10.5.225.121 – 10.5.225.126	10.5.225.127
49	10.5.225.128/29	10.5.225.129 – 10.5.225.134	10.5.225.135
50	10.5.225.136/29	10.5.225.137 – 10.5.225.142	10.5.225.143
51	10.5.225.144/29	10.5.225.145 – 10.5.225.150	10.5.225.151
52	10.5.225.152/29	10.5.225.153 – 10.5.225.158	10.5.225.159
53	10.5.225.160/29	10.5.225.161 – 10.5.225.166	10.5.225.167
54	10.5.225.168/29	10.5.225.169 – 10.5.225.174	10.5.225.175
55	10.5.225.176/29	10.5.225.177 – 10.5.225.182	10.5.225.183
56	10.5.225.184/29	10.5.225.185 – 10.5.225.190	10.5.225.191
57	10.5.225.192/29	10.5.225.193 – 10.5.225.198	10.5.225.199
58	10.5.225.200/29	10.5.225.201 – 10.5.225.206	10.5.225.207
59	10.5.225.208/29	10.5.225.209 – 10.5.225.214	10.5.225.215
60	10.5.225.216/29	10.5.225.217 – 10.5.225.222	10.5.225.223
61	10.5.225.224/29	10.5.225.225 – 10.5.225.230	10.5.225.231
62	10.5.225.232/29	10.5.225.233 – 10.5.225.238	10.5.225.239
63	10.5.225.240/29	10.5.225.241 – 10.5.225.246	10.5.225.247
64	10.5.225.248/29	10.5.225.249 – 10.5.225.254	10.5.225.255
65	10.5.226.0/29	10.5.226.1 – 10.5.226.6	10.5.226.7
66	10.5.226.8/29	10.5.226.9 – 10.5.226.14	10.5.226.15
67	10.5.226.16/29	10.5.226.17 – 10.5.226.22	10.5.226.23
68	10.5.226.24/29	10.5.226.25 – 10.5.226.30	10.5.226.31
69	10.5.226.32/29	10.5.226.33 – 10.5.226.38	10.5.226.39
70	10.5.226.40/29	10.5.226.41 – 10.5.226.46	10.5.226.47
71	10.5.226.48/29	10.5.226.49 – 10.5.226.54	10.5.226.55
72	10.5.226.56/29	10.5.226.57 – 10.5.226.62	10.5.226.63
73	10.5.226.64/29	10.5.226.65 – 10.5.226.70	10.5.226.71
74	10.5.226.72/29	10.5.226.73 – 10.5.226.78	10.5.226.79
75	10.5.226.80/29	10.5.226.81 – 10.5.226.86	10.5.226.87
76	10.5.226.88/29	10.5.226.89 – 10.5.226.94	10.5.226.95
77	10.5.226.96/29	10.5.226.97 – 10.5.226.102	10.5.226.103
78	10.5.226.104/29	10.5.226.105 – 10.5.226.110	10.5.226.111
79	10.5.226.112/29	10.5.226.113 – 10.5.226.118	10.5.226.119
80	10.5.226.120/29	10.5.226.121 – 10.5.226.126	10.5.226.127
81	10.5.226.128/29	10.5.226.129 – 10.5.226.134	10.5.226.135
82	10.5.226.136/29	10.5.226.137 – 10.5.226.142	10.5.226.143
83	10.5.226.144/29	10.5.226.145 – 10.5.226.150	10.5.226.151
84	10.5.226.152/29	10.5.226.153 – 10.5.226.158	10.5.226.159
85	10.5.226.160/29	10.5.226.161 – 10.5.226.166	10.5.226.167
86	10.5.226.168/29	10.5.226.169 – 10.5.226.174	10.5.226.175
87	10.5.226.176/29	10.5.226.177 – 10.5.226.182	10.5.226.183
88	10.5.226.184/29	10.5.226.185 – 10.5.226.190	10.5.226.191
89	10.5.226.192/29	10.5.226.193 – 10.5.226.198	10.5.226.199
90	10.5.226.200/29	10.5.226.201 – 10.5.226.206	10.5.226.207
91	10.5.226.208/29	10.5.226.209 – 10.5.226.214	10.5.226.215
92	10.5.226.216/29	10.5.226.217 – 10.5.226.222	10.5.226.223
93	10.5.226.224/29	10.5.226.225 – 10.5.226.230	10.5.226.231
94	10.5.226.232/29	10.5.226.233 – 10.5.226.238	10.5.226.239
95	10.5.226.240/29	10.5.226.241 – 10.5.226.246	10.5.226.247
96	10.5.226.248/29	10.5.226.249 – 10.5.226.254	10.5.226.255
97	10.5.227.0/29	10.5.227.1 – 10.5.227.6	10.5.227.7
98	10.5.227.8/29	10.5.227.9 – 10.5.227.14	10.5.227.15
99	10.5.227.16/29	10.5.227.17 – 10.5.227.22	10.5.227.23
100	10.5.227.24/29	10.5.227.25 – 10.5.227.30	10.5.227.31
101	10.5.227.32/29	10.5.227.33 – 10.5.227.38	10.5.227.39
102	10.5.227.40/29	10.5.227.41 – 10.5.227.46	10.5.227.47
103	10.5.227.48/29	10.5.227.49 – 10.5.227.54	10.5.227.55
104	10.5.227.56/29	10.5.227.57 – 10.5.227.62	10.5.227.63
105	10.5.227.64/29	10.5.227.65 – 10.5.227.70	10.5.227.71
106	10.5.227.72/29	10.5.227.73 – 10.5.227.78	10.5.227.79
107	10.5.227.80/29	10.5.227.81 – 10.5.227.86	10.5.227.87
108	10.5.227.88/29	10.5.227.89 – 10.5.227.94	10.5.227.95
109	10.5.227.96/29	10.5.227.97 – 10.5.227.102	10.5.227.103
110	10.5.227.104/29	10.5.227.105 – 10.5.227.110	10.5.227.111
111	10.5.227.112/29	10.5.227.113 – 10.5.227.118	10.5.227.119
112	10.5.227.120/29	10.5.227.121 – 10.5.227.126	10.5.227.127
113	10.5.227.128/29	10.5.227.129 – 10.5.227.134	10.5.227.135
114	10.5.227.136/29	10.5.227.137 – 10.5.227.142	10.5.227.143
115	10.5.227.144/29	10.5.227.145 – 10.5.227.150	10.5.227.151
116	10.5.227.152/29	10.5.227.153 – 10.5.227.158	10.5.227.159
117	10.5.227.160/29	10.5.227.161 – 10.5.227.166	10.5.227.167
118	10.5.227.168/29	10.5.227.169 – 10.5.227.174	10.5.227.175
119	10.5.227.176/29	10.5.227.177 – 10.5.227.182	10.5.227.183
120	10.5.227.184/29	10.5.227.185 – 10.5.227.190	10.5.227.191
121	10.5.227.192/29	10.5.227.193 – 10.5.227.198	10.5.227.199
122	10.5.227.200/29	10.5.227.201 – 10.5.227.206	10.5.227.207
123	10.5.227.208/29	10.5.227.209 – 10.5.227.214	10.5.227.215
124	10.5.227.216/29	10.5.227.217 – 10.5.227.222	10.5.227.223
125	10.5.227.224/29	10.5.227.225 – 10.5.227.230	10.5.227.231
126	10.5.227.232/29	10.5.227.233 – 10.5.227.238	10.5.227.239
127	10.5.227.240/29	10.5.227.241 – 10.5.227.246	10.5.227.247
128	10.5.227.248/29	10.5.227.249 – 10.5.227.254	10.5.227.255
129	10.5.228.0/29	10.5.228.1 – 10.5.228.6	10.5.228.7
130	10.5.228.8/29	10.5.228.9 – 10.5.228.14	10.5.228.15
131	10.5.228.16/29	10.5.228.17 – 10.5.228.22	10.5.228.23
132	10.5.228.24/29	10.5.228.25 – 10.5.228.30	10.5.228.31
133	10.5.228.32/29	10.5.228.33 – 10.5.228.38	10.5.228.39
134	10.5.228.40/29	10.5.228.41 – 10.5.228.46	10.5.228.47
135	10.5.228.48/29	10.5.228.49 – 10.5.228.54	10.5.228.55
136	10.5.228.56/29	10.5.228.57 – 10.5.228.62	10.5.228.63
137	10.5.228.64/29	10.5.228.65 – 10.5.228.70	10.5.228.71
138	10.5.228.72/29	10.5.228.73 – 10.5.228.78	10.5.228.79
139	10.5.228.80/29	10.5.228.81 – 10.5.228.86	10.5.228.87
140	10.5.228.88/29	10.5.228.89 – 10.5.228.94	10.5.228.95
141	10.5.228.96/29	10.5.228.97 – 10.5.228.102	10.5.228.103
142	10.5.228.104/29	10.5.228.105 – 10.5.228.110	10.5.228.111
143	10.5.228.112/29	10.5.228.113 – 10.5.228.118	10.5.228.119
144	10.5.228.120/29	10.5.228.121 – 10.5.228.126	10.5.228.127
145	10.5.228.128/29	10.5.228.129 – 10.5.228.134	10.5.228.135
146	10.5.228.136/29	10.5.228.137 – 10.5.228.142	10.5.228.143
147	10.5.228.144/29	10.5.228.145 – 10.5.228.150	10.5.228.151
148	10.5.228.152/29	10.5.228.153 – 10.5.228.158	10.5.228.159
149	10.5.228.160/29	10.5.228.161 – 10.5.228.166	10.5.228.167
150	10.5.228.168/29	10.5.228.169 – 10.5.228.174	10.5.228.175
151	10.5.228.176/29	10.5.228.177 – 10.5.228.182	10.5.228.183
152	10.5.228.184/29	10.5.228.185 – 10.5.228.190	10.5.228.191
153	10.5.228.192/29	10.5.228.193 – 10.5.228.198	10.5.228.199
154	10.5.228.200/29	10.5.228.201 – 10.5.228.206	10.5.228.207
155	10.5.228.208/29	10.5.228.209 – 10.5.228.214	10.5.228.215
156	10.5.228.216/29	10.5.228.217 – 10.5.228.222	10.5.228.223
157	10.5.228.224/29	10.5.228.225 – 10.5.228.230	10.5.228.231
158	10.5.228.232/29	10.5.228.233 – 10.5.228.238	10.5.228.239
159	10.5.228.240/29	10.5.228.241 – 10.5.228.246	10.5.228.247
160	10.5.228.248/29	10.5.228.249 – 10.5.228.254	10.5.228.255
161	10.5.229.0/29	10.5.229.1 – 10.5.229.6	10.5.229.7
162	10.5.229.8/29	10.5.229.9 – 10.5.229.14	10.5.229.15
163	10.5.229.16/29	10.5.229.17 – 10.5.229.22	10.5.229.23
164	10.5.229.24/29	10.5.229.25 – 10.5.229.30	10.5.229.31
165	10.5.229.32/29	10.5.229.33 – 10.5.229.38	10.5.229.39
166	10.5.229.40/29	10.5.229.41 – 10.5.229.46	10.5.229.47
167	10.5.229.48/29	10.5.229.49 – 10.5.229.54	10.5.229.55
168	10.5.229.56/29	10.5.229.57 – 10.5.229.62	10.5.229.63
169	10.5.229.64/29	10.5.229.65 – 10.5.229.70	10.5.229.71
170	10.5.229.72/29	10.5.229.73 – 10.5.229.78	10.5.229.79
171	10.5.229.80/29	10.5.229.81 – 10.5.229.86	10.5.229.87
172	10.5.229.88/29	10.5.229.89 – 10.5.229.94	10.5.229.95
173	10.5.229.96/29	10.5.229.97 – 10.5.229.102	10.5.229.103
174	10.5.229.104/29	10.5.229.105 – 10.5.229.110	10.5.229.111
175	10.5.229.112/29	10.5.229.113 – 10.5.229.118	10.5.229.119
176	10.5.229.120/29	10.5.229.121 – 10.5.229.126	10.5.229.127
177	10.5.229.128/29	10.5.229.129 – 10.5.229.134	10.5.229.135
178	10.5.229.136/29	10.5.229.137 – 10.5.229.142	10.5.229.143
179	10.5.229.144/29	10.5.229.145 – 10.5.229.150	10.5.229.151
180	10.5.229.152/29	10.5.229.153 – 10.5.229.158	10.5.229.159
181	10.5.229.160/29	10.5.229.161 – 10.5.229.166	10.5.229.167
182	10.5.229.168/29	10.5.229.169 – 10.5.229.174	10.5.229.175
183	10.5.229.176/29	10.5.229.177 – 10.5.229.182	10.5.229.183
184	10.5.229.184/29	10.5.229.185 – 10.5.229.190	10.5.229.191
185	10.5.229.192/29	10.5.229.193 – 10.5.229.198	10.5.229.199
186	10.5.229.200/29	10.5.229.201 – 10.5.229.206	10.5.229.207
187	10.5.229.208/29	10.5.229.209 – 10.5.229.214	10.5.229.215
188	10.5.229.216/29	10.5.229.217 – 10.5.229.222	10.5.229.223
189	10.5.229.224/29	10.5.229.225 – 10.5.229.230	10.5.229.231
190	10.5.229.232/29	10.5.229.233 – 10.5.229.238	10.5.229.239
191	10.5.229.240/29	10.5.229.241 – 10.5.229.246	10.5.229.247
192	10.5.229.248/29	10.5.229.249 – 10.5.229.254	10.5.229.255
193	10.5.230.0/29	10.5.230.1 – 10.5.230.6	10.5.230.7
194	10.5.230.8/29	10.5.230.9 – 10.5.230.14	10.5.230.15
195	10.5.230.16/29	10.5.230.17 – 10.5.230.22	10.5.230.23
196	10.5.230.24/29	10.5.230.25 – 10.5.230.30	10.5.230.31
197	10.5.230.32/29	10.5.230.33 – 10.5.230.38	10.5.230.39
198	10.5.230.40/29	10.5.230.41 – 10.5.230.46	10.5.230.47
199	10.5.230.48/29	10.5.230.49 – 10.5.230.54	10.5.230.55
200	10.5.230.56/29	10.5.230.57 – 10.5.230.62	10.5.230.63
201	10.5.230.64/29	10.5.230.65 – 10.5.230.70	10.5.230.71
202	10.5.230.72/29	10.5.230.73 – 10.5.230.78	10.5.230.79
203	10.5.230.80/29	10.5.230.81 – 10.5.230.86	10.5.230.87
204	10.5.230.88/29	10.5.230.89 – 10.5.230.94	10.5.230.95
205	10.5.230.96/29	10.5.230.97 – 10.5.230.102	10.5.230.103
206	10.5.230.104/29	10.5.230.105 – 10.5.230.110	10.5.230.111
207	10.5.230.112/29	10.5.230.113 – 10.5.230.118	10.5.230.119
208	10.5.230.120/29	10.5.230.121 – 10.5.230.126	10.5.230.127
209	10.5.230.128/29	10.5.230.129 – 10.5.230.134	10.5.230.135
210	10.5.230.136/29	10.5.230.137 – 10.5.230.142	10.5.230.143
211	10.5.230.144/29	10.5.230.145 – 10.5.230.150	10.5.230.151
212	10.5.230.152/29	10.5.230.153 – 10.5.230.158	10.5.230.159
213	10.5.230.160/29	10.5.230.161 – 10.5.230.166	10.5.230.167
214	10.5.230.168/29	10.5.230.169 – 10.5.230.174	10.5.230.175
215	10.5.230.176/29	10.5.230.177 – 10.5.230.182	10.5.230.183
216	10.5.230.184/29	10.5.230.185 – 10.5.230.190	10.5.230.191
217	10.5.230.192/29	10.5.230.193 – 10.5.230.198	10.5.230.199
218	10.5.230.200/29	10.5.230.201 – 10.5.230.206	10.5.230.207
219	10.5.230.208/29	10.5.230.209 – 10.5.230.214	10.5.230.215
220	10.5.230.216/29	10.5.230.217 – 10.5.230.222	10.5.230.223
221	10.5.230.224/29	10.5.230.225 – 10.5.230.230	10.5.230.231
222	10.5.230.232/29	10.5.230.233 – 10.5.230.238	10.5.230.239
223	10.5.230.240/29	10.5.230.241 – 10.5.230.246	10.5.230.247
224	10.5.230.248/29	10.5.230.249 – 10.5.230.254	10.5.230.255
225	10.5.231.0/29	10.5.231.1 – 10.5.231.6	10.5.231.7
226	10.5.231.8/29	10.5.231.9 – 10.5.231.14	10.5.231.15
227	10.5.231.16/29	10.5.231.17 – 10.5.231.22	10.5.231.23
228	10.5.231.24/29	10.5.231.25 – 10.5.231.30	10.5.231.31
229	10.5.231.32/29	10.5.231.33 – 10.5.231.38	10.5.231.39
230	10.5.231.40/29	10.5.231.41 – 10.5.231.46	10.5.231.47
231	10.5.231.48/29	10.5.231.49 – 10.5.231.54	10.5.231.55
232	10.5.231.56/29	10.5.231.57 – 10.5.231.62	10.5.231.63
233	10.5.231.64/29	10.5.231.65 – 10.5.231.70	10.5.231.71
234	10.5.231.72/29	10.5.231.73 – 10.5.231.78	10.5.231.79
235	10.5.231.80/29	10.5.231.81 – 10.5.231.86	10.5.231.87
236	10.5.231.88/29	10.5.231.89 – 10.5.231.94	10.5.231.95
237	10.5.231.96/29	10.5.231.97 – 10.5.231.102	10.5.231.103
238	10.5.231.104/29	10.5.231.105 – 10.5.231.110	10.5.231.111
239	10.5.231.112/29	10.5.231.113 – 10.5.231.118	10.5.231.119
240	10.5.231.120/29	10.5.231.121 – 10.5.231.126	10.5.231.127
241	10.5.231.128/29	10.5.231.129 – 10.5.231.134	10.5.231.135
242	10.5.231.136/29	10.5.231.137 – 10.5.231.142	10.5.231.143
243	10.5.231.144/29	10.5.231.145 – 10.5.231.150	10.5.231.151
244	10.5.231.152/29	10.5.231.153 – 10.5.231.158	10.5.231.159
245	10.5.231.160/29	10.5.231.161 – 10.5.231.166	10.5.231.167
246	10.5.231.168/29	10.5.231.169 – 10.5.231.174	10.5.231.175
247	10.5.231.176/29	10.5.231.177 – 10.5.231.182	10.5.231.183
248	10.5.231.184/29	10.5.231.185 – 10.5.231.190	10.5.231.191
249	10.5.231.192/29	10.5.231.193 – 10.5.231.198	10.5.231.199
250	10.5.231.200/29	10.5.231.201 – 10.5.231.206	10.5.231.207
251	10.5.231.208/29	10.5.231.209 – 10.5.231.214	10.5.231.215
252	10.5.231.216/29	10.5.231.217 – 10.5.231.222	10.5.231.223
253	10.5.231.224/29	10.5.231.225 – 10.5.231.230	10.5.231.231
254	10.5.231.232/29	10.5.231.233 – 10.5.231.238	10.5.231.239
255	10.5.231.240/29	10.5.231.241 – 10.5.231.246	10.5.231.247
256	10.5.231.248/29	10.5.231.249 – 10.5.231.254	10.5.231.255

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 →