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)10.4.144.0/20

network10.4.144.0/20

broadcast10.4.159.255

first host10.4.144.1

last host10.4.159.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.4.144.0/20

address00001010.00000100.10010000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.00000100.10010000.00000000

broadcast00001010.00000100.10011111.11111111

green = network part, grey = host part

hex0x0a049000

decimal168071168

reverse dns0.144.4.10.in-addr.arpa

ipv4-mapped::ffff:a04:9000

/20 split into /29 · 512 subnets

close ×

#	network	host range	broadcast
1	10.4.144.0/29	10.4.144.1 – 10.4.144.6	10.4.144.7
2	10.4.144.8/29	10.4.144.9 – 10.4.144.14	10.4.144.15
3	10.4.144.16/29	10.4.144.17 – 10.4.144.22	10.4.144.23
4	10.4.144.24/29	10.4.144.25 – 10.4.144.30	10.4.144.31
5	10.4.144.32/29	10.4.144.33 – 10.4.144.38	10.4.144.39
6	10.4.144.40/29	10.4.144.41 – 10.4.144.46	10.4.144.47
7	10.4.144.48/29	10.4.144.49 – 10.4.144.54	10.4.144.55
8	10.4.144.56/29	10.4.144.57 – 10.4.144.62	10.4.144.63
9	10.4.144.64/29	10.4.144.65 – 10.4.144.70	10.4.144.71
10	10.4.144.72/29	10.4.144.73 – 10.4.144.78	10.4.144.79
11	10.4.144.80/29	10.4.144.81 – 10.4.144.86	10.4.144.87
12	10.4.144.88/29	10.4.144.89 – 10.4.144.94	10.4.144.95
13	10.4.144.96/29	10.4.144.97 – 10.4.144.102	10.4.144.103
14	10.4.144.104/29	10.4.144.105 – 10.4.144.110	10.4.144.111
15	10.4.144.112/29	10.4.144.113 – 10.4.144.118	10.4.144.119
16	10.4.144.120/29	10.4.144.121 – 10.4.144.126	10.4.144.127
17	10.4.144.128/29	10.4.144.129 – 10.4.144.134	10.4.144.135
18	10.4.144.136/29	10.4.144.137 – 10.4.144.142	10.4.144.143
19	10.4.144.144/29	10.4.144.145 – 10.4.144.150	10.4.144.151
20	10.4.144.152/29	10.4.144.153 – 10.4.144.158	10.4.144.159
21	10.4.144.160/29	10.4.144.161 – 10.4.144.166	10.4.144.167
22	10.4.144.168/29	10.4.144.169 – 10.4.144.174	10.4.144.175
23	10.4.144.176/29	10.4.144.177 – 10.4.144.182	10.4.144.183
24	10.4.144.184/29	10.4.144.185 – 10.4.144.190	10.4.144.191
25	10.4.144.192/29	10.4.144.193 – 10.4.144.198	10.4.144.199
26	10.4.144.200/29	10.4.144.201 – 10.4.144.206	10.4.144.207
27	10.4.144.208/29	10.4.144.209 – 10.4.144.214	10.4.144.215
28	10.4.144.216/29	10.4.144.217 – 10.4.144.222	10.4.144.223
29	10.4.144.224/29	10.4.144.225 – 10.4.144.230	10.4.144.231
30	10.4.144.232/29	10.4.144.233 – 10.4.144.238	10.4.144.239
31	10.4.144.240/29	10.4.144.241 – 10.4.144.246	10.4.144.247
32	10.4.144.248/29	10.4.144.249 – 10.4.144.254	10.4.144.255
33	10.4.145.0/29	10.4.145.1 – 10.4.145.6	10.4.145.7
34	10.4.145.8/29	10.4.145.9 – 10.4.145.14	10.4.145.15
35	10.4.145.16/29	10.4.145.17 – 10.4.145.22	10.4.145.23
36	10.4.145.24/29	10.4.145.25 – 10.4.145.30	10.4.145.31
37	10.4.145.32/29	10.4.145.33 – 10.4.145.38	10.4.145.39
38	10.4.145.40/29	10.4.145.41 – 10.4.145.46	10.4.145.47
39	10.4.145.48/29	10.4.145.49 – 10.4.145.54	10.4.145.55
40	10.4.145.56/29	10.4.145.57 – 10.4.145.62	10.4.145.63
41	10.4.145.64/29	10.4.145.65 – 10.4.145.70	10.4.145.71
42	10.4.145.72/29	10.4.145.73 – 10.4.145.78	10.4.145.79
43	10.4.145.80/29	10.4.145.81 – 10.4.145.86	10.4.145.87
44	10.4.145.88/29	10.4.145.89 – 10.4.145.94	10.4.145.95
45	10.4.145.96/29	10.4.145.97 – 10.4.145.102	10.4.145.103
46	10.4.145.104/29	10.4.145.105 – 10.4.145.110	10.4.145.111
47	10.4.145.112/29	10.4.145.113 – 10.4.145.118	10.4.145.119
48	10.4.145.120/29	10.4.145.121 – 10.4.145.126	10.4.145.127
49	10.4.145.128/29	10.4.145.129 – 10.4.145.134	10.4.145.135
50	10.4.145.136/29	10.4.145.137 – 10.4.145.142	10.4.145.143
51	10.4.145.144/29	10.4.145.145 – 10.4.145.150	10.4.145.151
52	10.4.145.152/29	10.4.145.153 – 10.4.145.158	10.4.145.159
53	10.4.145.160/29	10.4.145.161 – 10.4.145.166	10.4.145.167
54	10.4.145.168/29	10.4.145.169 – 10.4.145.174	10.4.145.175
55	10.4.145.176/29	10.4.145.177 – 10.4.145.182	10.4.145.183
56	10.4.145.184/29	10.4.145.185 – 10.4.145.190	10.4.145.191
57	10.4.145.192/29	10.4.145.193 – 10.4.145.198	10.4.145.199
58	10.4.145.200/29	10.4.145.201 – 10.4.145.206	10.4.145.207
59	10.4.145.208/29	10.4.145.209 – 10.4.145.214	10.4.145.215
60	10.4.145.216/29	10.4.145.217 – 10.4.145.222	10.4.145.223
61	10.4.145.224/29	10.4.145.225 – 10.4.145.230	10.4.145.231
62	10.4.145.232/29	10.4.145.233 – 10.4.145.238	10.4.145.239
63	10.4.145.240/29	10.4.145.241 – 10.4.145.246	10.4.145.247
64	10.4.145.248/29	10.4.145.249 – 10.4.145.254	10.4.145.255
65	10.4.146.0/29	10.4.146.1 – 10.4.146.6	10.4.146.7
66	10.4.146.8/29	10.4.146.9 – 10.4.146.14	10.4.146.15
67	10.4.146.16/29	10.4.146.17 – 10.4.146.22	10.4.146.23
68	10.4.146.24/29	10.4.146.25 – 10.4.146.30	10.4.146.31
69	10.4.146.32/29	10.4.146.33 – 10.4.146.38	10.4.146.39
70	10.4.146.40/29	10.4.146.41 – 10.4.146.46	10.4.146.47
71	10.4.146.48/29	10.4.146.49 – 10.4.146.54	10.4.146.55
72	10.4.146.56/29	10.4.146.57 – 10.4.146.62	10.4.146.63
73	10.4.146.64/29	10.4.146.65 – 10.4.146.70	10.4.146.71
74	10.4.146.72/29	10.4.146.73 – 10.4.146.78	10.4.146.79
75	10.4.146.80/29	10.4.146.81 – 10.4.146.86	10.4.146.87
76	10.4.146.88/29	10.4.146.89 – 10.4.146.94	10.4.146.95
77	10.4.146.96/29	10.4.146.97 – 10.4.146.102	10.4.146.103
78	10.4.146.104/29	10.4.146.105 – 10.4.146.110	10.4.146.111
79	10.4.146.112/29	10.4.146.113 – 10.4.146.118	10.4.146.119
80	10.4.146.120/29	10.4.146.121 – 10.4.146.126	10.4.146.127
81	10.4.146.128/29	10.4.146.129 – 10.4.146.134	10.4.146.135
82	10.4.146.136/29	10.4.146.137 – 10.4.146.142	10.4.146.143
83	10.4.146.144/29	10.4.146.145 – 10.4.146.150	10.4.146.151
84	10.4.146.152/29	10.4.146.153 – 10.4.146.158	10.4.146.159
85	10.4.146.160/29	10.4.146.161 – 10.4.146.166	10.4.146.167
86	10.4.146.168/29	10.4.146.169 – 10.4.146.174	10.4.146.175
87	10.4.146.176/29	10.4.146.177 – 10.4.146.182	10.4.146.183
88	10.4.146.184/29	10.4.146.185 – 10.4.146.190	10.4.146.191
89	10.4.146.192/29	10.4.146.193 – 10.4.146.198	10.4.146.199
90	10.4.146.200/29	10.4.146.201 – 10.4.146.206	10.4.146.207
91	10.4.146.208/29	10.4.146.209 – 10.4.146.214	10.4.146.215
92	10.4.146.216/29	10.4.146.217 – 10.4.146.222	10.4.146.223
93	10.4.146.224/29	10.4.146.225 – 10.4.146.230	10.4.146.231
94	10.4.146.232/29	10.4.146.233 – 10.4.146.238	10.4.146.239
95	10.4.146.240/29	10.4.146.241 – 10.4.146.246	10.4.146.247
96	10.4.146.248/29	10.4.146.249 – 10.4.146.254	10.4.146.255
97	10.4.147.0/29	10.4.147.1 – 10.4.147.6	10.4.147.7
98	10.4.147.8/29	10.4.147.9 – 10.4.147.14	10.4.147.15
99	10.4.147.16/29	10.4.147.17 – 10.4.147.22	10.4.147.23
100	10.4.147.24/29	10.4.147.25 – 10.4.147.30	10.4.147.31
101	10.4.147.32/29	10.4.147.33 – 10.4.147.38	10.4.147.39
102	10.4.147.40/29	10.4.147.41 – 10.4.147.46	10.4.147.47
103	10.4.147.48/29	10.4.147.49 – 10.4.147.54	10.4.147.55
104	10.4.147.56/29	10.4.147.57 – 10.4.147.62	10.4.147.63
105	10.4.147.64/29	10.4.147.65 – 10.4.147.70	10.4.147.71
106	10.4.147.72/29	10.4.147.73 – 10.4.147.78	10.4.147.79
107	10.4.147.80/29	10.4.147.81 – 10.4.147.86	10.4.147.87
108	10.4.147.88/29	10.4.147.89 – 10.4.147.94	10.4.147.95
109	10.4.147.96/29	10.4.147.97 – 10.4.147.102	10.4.147.103
110	10.4.147.104/29	10.4.147.105 – 10.4.147.110	10.4.147.111
111	10.4.147.112/29	10.4.147.113 – 10.4.147.118	10.4.147.119
112	10.4.147.120/29	10.4.147.121 – 10.4.147.126	10.4.147.127
113	10.4.147.128/29	10.4.147.129 – 10.4.147.134	10.4.147.135
114	10.4.147.136/29	10.4.147.137 – 10.4.147.142	10.4.147.143
115	10.4.147.144/29	10.4.147.145 – 10.4.147.150	10.4.147.151
116	10.4.147.152/29	10.4.147.153 – 10.4.147.158	10.4.147.159
117	10.4.147.160/29	10.4.147.161 – 10.4.147.166	10.4.147.167
118	10.4.147.168/29	10.4.147.169 – 10.4.147.174	10.4.147.175
119	10.4.147.176/29	10.4.147.177 – 10.4.147.182	10.4.147.183
120	10.4.147.184/29	10.4.147.185 – 10.4.147.190	10.4.147.191
121	10.4.147.192/29	10.4.147.193 – 10.4.147.198	10.4.147.199
122	10.4.147.200/29	10.4.147.201 – 10.4.147.206	10.4.147.207
123	10.4.147.208/29	10.4.147.209 – 10.4.147.214	10.4.147.215
124	10.4.147.216/29	10.4.147.217 – 10.4.147.222	10.4.147.223
125	10.4.147.224/29	10.4.147.225 – 10.4.147.230	10.4.147.231
126	10.4.147.232/29	10.4.147.233 – 10.4.147.238	10.4.147.239
127	10.4.147.240/29	10.4.147.241 – 10.4.147.246	10.4.147.247
128	10.4.147.248/29	10.4.147.249 – 10.4.147.254	10.4.147.255
129	10.4.148.0/29	10.4.148.1 – 10.4.148.6	10.4.148.7
130	10.4.148.8/29	10.4.148.9 – 10.4.148.14	10.4.148.15
131	10.4.148.16/29	10.4.148.17 – 10.4.148.22	10.4.148.23
132	10.4.148.24/29	10.4.148.25 – 10.4.148.30	10.4.148.31
133	10.4.148.32/29	10.4.148.33 – 10.4.148.38	10.4.148.39
134	10.4.148.40/29	10.4.148.41 – 10.4.148.46	10.4.148.47
135	10.4.148.48/29	10.4.148.49 – 10.4.148.54	10.4.148.55
136	10.4.148.56/29	10.4.148.57 – 10.4.148.62	10.4.148.63
137	10.4.148.64/29	10.4.148.65 – 10.4.148.70	10.4.148.71
138	10.4.148.72/29	10.4.148.73 – 10.4.148.78	10.4.148.79
139	10.4.148.80/29	10.4.148.81 – 10.4.148.86	10.4.148.87
140	10.4.148.88/29	10.4.148.89 – 10.4.148.94	10.4.148.95
141	10.4.148.96/29	10.4.148.97 – 10.4.148.102	10.4.148.103
142	10.4.148.104/29	10.4.148.105 – 10.4.148.110	10.4.148.111
143	10.4.148.112/29	10.4.148.113 – 10.4.148.118	10.4.148.119
144	10.4.148.120/29	10.4.148.121 – 10.4.148.126	10.4.148.127
145	10.4.148.128/29	10.4.148.129 – 10.4.148.134	10.4.148.135
146	10.4.148.136/29	10.4.148.137 – 10.4.148.142	10.4.148.143
147	10.4.148.144/29	10.4.148.145 – 10.4.148.150	10.4.148.151
148	10.4.148.152/29	10.4.148.153 – 10.4.148.158	10.4.148.159
149	10.4.148.160/29	10.4.148.161 – 10.4.148.166	10.4.148.167
150	10.4.148.168/29	10.4.148.169 – 10.4.148.174	10.4.148.175
151	10.4.148.176/29	10.4.148.177 – 10.4.148.182	10.4.148.183
152	10.4.148.184/29	10.4.148.185 – 10.4.148.190	10.4.148.191
153	10.4.148.192/29	10.4.148.193 – 10.4.148.198	10.4.148.199
154	10.4.148.200/29	10.4.148.201 – 10.4.148.206	10.4.148.207
155	10.4.148.208/29	10.4.148.209 – 10.4.148.214	10.4.148.215
156	10.4.148.216/29	10.4.148.217 – 10.4.148.222	10.4.148.223
157	10.4.148.224/29	10.4.148.225 – 10.4.148.230	10.4.148.231
158	10.4.148.232/29	10.4.148.233 – 10.4.148.238	10.4.148.239
159	10.4.148.240/29	10.4.148.241 – 10.4.148.246	10.4.148.247
160	10.4.148.248/29	10.4.148.249 – 10.4.148.254	10.4.148.255
161	10.4.149.0/29	10.4.149.1 – 10.4.149.6	10.4.149.7
162	10.4.149.8/29	10.4.149.9 – 10.4.149.14	10.4.149.15
163	10.4.149.16/29	10.4.149.17 – 10.4.149.22	10.4.149.23
164	10.4.149.24/29	10.4.149.25 – 10.4.149.30	10.4.149.31
165	10.4.149.32/29	10.4.149.33 – 10.4.149.38	10.4.149.39
166	10.4.149.40/29	10.4.149.41 – 10.4.149.46	10.4.149.47
167	10.4.149.48/29	10.4.149.49 – 10.4.149.54	10.4.149.55
168	10.4.149.56/29	10.4.149.57 – 10.4.149.62	10.4.149.63
169	10.4.149.64/29	10.4.149.65 – 10.4.149.70	10.4.149.71
170	10.4.149.72/29	10.4.149.73 – 10.4.149.78	10.4.149.79
171	10.4.149.80/29	10.4.149.81 – 10.4.149.86	10.4.149.87
172	10.4.149.88/29	10.4.149.89 – 10.4.149.94	10.4.149.95
173	10.4.149.96/29	10.4.149.97 – 10.4.149.102	10.4.149.103
174	10.4.149.104/29	10.4.149.105 – 10.4.149.110	10.4.149.111
175	10.4.149.112/29	10.4.149.113 – 10.4.149.118	10.4.149.119
176	10.4.149.120/29	10.4.149.121 – 10.4.149.126	10.4.149.127
177	10.4.149.128/29	10.4.149.129 – 10.4.149.134	10.4.149.135
178	10.4.149.136/29	10.4.149.137 – 10.4.149.142	10.4.149.143
179	10.4.149.144/29	10.4.149.145 – 10.4.149.150	10.4.149.151
180	10.4.149.152/29	10.4.149.153 – 10.4.149.158	10.4.149.159
181	10.4.149.160/29	10.4.149.161 – 10.4.149.166	10.4.149.167
182	10.4.149.168/29	10.4.149.169 – 10.4.149.174	10.4.149.175
183	10.4.149.176/29	10.4.149.177 – 10.4.149.182	10.4.149.183
184	10.4.149.184/29	10.4.149.185 – 10.4.149.190	10.4.149.191
185	10.4.149.192/29	10.4.149.193 – 10.4.149.198	10.4.149.199
186	10.4.149.200/29	10.4.149.201 – 10.4.149.206	10.4.149.207
187	10.4.149.208/29	10.4.149.209 – 10.4.149.214	10.4.149.215
188	10.4.149.216/29	10.4.149.217 – 10.4.149.222	10.4.149.223
189	10.4.149.224/29	10.4.149.225 – 10.4.149.230	10.4.149.231
190	10.4.149.232/29	10.4.149.233 – 10.4.149.238	10.4.149.239
191	10.4.149.240/29	10.4.149.241 – 10.4.149.246	10.4.149.247
192	10.4.149.248/29	10.4.149.249 – 10.4.149.254	10.4.149.255
193	10.4.150.0/29	10.4.150.1 – 10.4.150.6	10.4.150.7
194	10.4.150.8/29	10.4.150.9 – 10.4.150.14	10.4.150.15
195	10.4.150.16/29	10.4.150.17 – 10.4.150.22	10.4.150.23
196	10.4.150.24/29	10.4.150.25 – 10.4.150.30	10.4.150.31
197	10.4.150.32/29	10.4.150.33 – 10.4.150.38	10.4.150.39
198	10.4.150.40/29	10.4.150.41 – 10.4.150.46	10.4.150.47
199	10.4.150.48/29	10.4.150.49 – 10.4.150.54	10.4.150.55
200	10.4.150.56/29	10.4.150.57 – 10.4.150.62	10.4.150.63
201	10.4.150.64/29	10.4.150.65 – 10.4.150.70	10.4.150.71
202	10.4.150.72/29	10.4.150.73 – 10.4.150.78	10.4.150.79
203	10.4.150.80/29	10.4.150.81 – 10.4.150.86	10.4.150.87
204	10.4.150.88/29	10.4.150.89 – 10.4.150.94	10.4.150.95
205	10.4.150.96/29	10.4.150.97 – 10.4.150.102	10.4.150.103
206	10.4.150.104/29	10.4.150.105 – 10.4.150.110	10.4.150.111
207	10.4.150.112/29	10.4.150.113 – 10.4.150.118	10.4.150.119
208	10.4.150.120/29	10.4.150.121 – 10.4.150.126	10.4.150.127
209	10.4.150.128/29	10.4.150.129 – 10.4.150.134	10.4.150.135
210	10.4.150.136/29	10.4.150.137 – 10.4.150.142	10.4.150.143
211	10.4.150.144/29	10.4.150.145 – 10.4.150.150	10.4.150.151
212	10.4.150.152/29	10.4.150.153 – 10.4.150.158	10.4.150.159
213	10.4.150.160/29	10.4.150.161 – 10.4.150.166	10.4.150.167
214	10.4.150.168/29	10.4.150.169 – 10.4.150.174	10.4.150.175
215	10.4.150.176/29	10.4.150.177 – 10.4.150.182	10.4.150.183
216	10.4.150.184/29	10.4.150.185 – 10.4.150.190	10.4.150.191
217	10.4.150.192/29	10.4.150.193 – 10.4.150.198	10.4.150.199
218	10.4.150.200/29	10.4.150.201 – 10.4.150.206	10.4.150.207
219	10.4.150.208/29	10.4.150.209 – 10.4.150.214	10.4.150.215
220	10.4.150.216/29	10.4.150.217 – 10.4.150.222	10.4.150.223
221	10.4.150.224/29	10.4.150.225 – 10.4.150.230	10.4.150.231
222	10.4.150.232/29	10.4.150.233 – 10.4.150.238	10.4.150.239
223	10.4.150.240/29	10.4.150.241 – 10.4.150.246	10.4.150.247
224	10.4.150.248/29	10.4.150.249 – 10.4.150.254	10.4.150.255
225	10.4.151.0/29	10.4.151.1 – 10.4.151.6	10.4.151.7
226	10.4.151.8/29	10.4.151.9 – 10.4.151.14	10.4.151.15
227	10.4.151.16/29	10.4.151.17 – 10.4.151.22	10.4.151.23
228	10.4.151.24/29	10.4.151.25 – 10.4.151.30	10.4.151.31
229	10.4.151.32/29	10.4.151.33 – 10.4.151.38	10.4.151.39
230	10.4.151.40/29	10.4.151.41 – 10.4.151.46	10.4.151.47
231	10.4.151.48/29	10.4.151.49 – 10.4.151.54	10.4.151.55
232	10.4.151.56/29	10.4.151.57 – 10.4.151.62	10.4.151.63
233	10.4.151.64/29	10.4.151.65 – 10.4.151.70	10.4.151.71
234	10.4.151.72/29	10.4.151.73 – 10.4.151.78	10.4.151.79
235	10.4.151.80/29	10.4.151.81 – 10.4.151.86	10.4.151.87
236	10.4.151.88/29	10.4.151.89 – 10.4.151.94	10.4.151.95
237	10.4.151.96/29	10.4.151.97 – 10.4.151.102	10.4.151.103
238	10.4.151.104/29	10.4.151.105 – 10.4.151.110	10.4.151.111
239	10.4.151.112/29	10.4.151.113 – 10.4.151.118	10.4.151.119
240	10.4.151.120/29	10.4.151.121 – 10.4.151.126	10.4.151.127
241	10.4.151.128/29	10.4.151.129 – 10.4.151.134	10.4.151.135
242	10.4.151.136/29	10.4.151.137 – 10.4.151.142	10.4.151.143
243	10.4.151.144/29	10.4.151.145 – 10.4.151.150	10.4.151.151
244	10.4.151.152/29	10.4.151.153 – 10.4.151.158	10.4.151.159
245	10.4.151.160/29	10.4.151.161 – 10.4.151.166	10.4.151.167
246	10.4.151.168/29	10.4.151.169 – 10.4.151.174	10.4.151.175
247	10.4.151.176/29	10.4.151.177 – 10.4.151.182	10.4.151.183
248	10.4.151.184/29	10.4.151.185 – 10.4.151.190	10.4.151.191
249	10.4.151.192/29	10.4.151.193 – 10.4.151.198	10.4.151.199
250	10.4.151.200/29	10.4.151.201 – 10.4.151.206	10.4.151.207
251	10.4.151.208/29	10.4.151.209 – 10.4.151.214	10.4.151.215
252	10.4.151.216/29	10.4.151.217 – 10.4.151.222	10.4.151.223
253	10.4.151.224/29	10.4.151.225 – 10.4.151.230	10.4.151.231
254	10.4.151.232/29	10.4.151.233 – 10.4.151.238	10.4.151.239
255	10.4.151.240/29	10.4.151.241 – 10.4.151.246	10.4.151.247
256	10.4.151.248/29	10.4.151.249 – 10.4.151.254	10.4.151.255

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 →