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)10.3.48.0/20

network10.3.48.0/20

broadcast10.3.63.255

first host10.3.48.1

last host10.3.63.254

subnet mask255.255.240.0

wildcard0.0.15.255

addresses4,096

usable hosts4,094

classA

ipcalc 10.3.48.0/20

address00001010.00000011.00110000.00000000

subnet mask11111111.11111111.11110000.00000000

network00001010.00000011.00110000.00000000

broadcast00001010.00000011.00111111.11111111

green = network part, grey = host part

hex0x0a033000

decimal167981056

reverse dns0.48.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3000

/20 split into /29 · 512 subnets

close ×

#	network	host range	broadcast
1	10.3.48.0/29	10.3.48.1 – 10.3.48.6	10.3.48.7
2	10.3.48.8/29	10.3.48.9 – 10.3.48.14	10.3.48.15
3	10.3.48.16/29	10.3.48.17 – 10.3.48.22	10.3.48.23
4	10.3.48.24/29	10.3.48.25 – 10.3.48.30	10.3.48.31
5	10.3.48.32/29	10.3.48.33 – 10.3.48.38	10.3.48.39
6	10.3.48.40/29	10.3.48.41 – 10.3.48.46	10.3.48.47
7	10.3.48.48/29	10.3.48.49 – 10.3.48.54	10.3.48.55
8	10.3.48.56/29	10.3.48.57 – 10.3.48.62	10.3.48.63
9	10.3.48.64/29	10.3.48.65 – 10.3.48.70	10.3.48.71
10	10.3.48.72/29	10.3.48.73 – 10.3.48.78	10.3.48.79
11	10.3.48.80/29	10.3.48.81 – 10.3.48.86	10.3.48.87
12	10.3.48.88/29	10.3.48.89 – 10.3.48.94	10.3.48.95
13	10.3.48.96/29	10.3.48.97 – 10.3.48.102	10.3.48.103
14	10.3.48.104/29	10.3.48.105 – 10.3.48.110	10.3.48.111
15	10.3.48.112/29	10.3.48.113 – 10.3.48.118	10.3.48.119
16	10.3.48.120/29	10.3.48.121 – 10.3.48.126	10.3.48.127
17	10.3.48.128/29	10.3.48.129 – 10.3.48.134	10.3.48.135
18	10.3.48.136/29	10.3.48.137 – 10.3.48.142	10.3.48.143
19	10.3.48.144/29	10.3.48.145 – 10.3.48.150	10.3.48.151
20	10.3.48.152/29	10.3.48.153 – 10.3.48.158	10.3.48.159
21	10.3.48.160/29	10.3.48.161 – 10.3.48.166	10.3.48.167
22	10.3.48.168/29	10.3.48.169 – 10.3.48.174	10.3.48.175
23	10.3.48.176/29	10.3.48.177 – 10.3.48.182	10.3.48.183
24	10.3.48.184/29	10.3.48.185 – 10.3.48.190	10.3.48.191
25	10.3.48.192/29	10.3.48.193 – 10.3.48.198	10.3.48.199
26	10.3.48.200/29	10.3.48.201 – 10.3.48.206	10.3.48.207
27	10.3.48.208/29	10.3.48.209 – 10.3.48.214	10.3.48.215
28	10.3.48.216/29	10.3.48.217 – 10.3.48.222	10.3.48.223
29	10.3.48.224/29	10.3.48.225 – 10.3.48.230	10.3.48.231
30	10.3.48.232/29	10.3.48.233 – 10.3.48.238	10.3.48.239
31	10.3.48.240/29	10.3.48.241 – 10.3.48.246	10.3.48.247
32	10.3.48.248/29	10.3.48.249 – 10.3.48.254	10.3.48.255
33	10.3.49.0/29	10.3.49.1 – 10.3.49.6	10.3.49.7
34	10.3.49.8/29	10.3.49.9 – 10.3.49.14	10.3.49.15
35	10.3.49.16/29	10.3.49.17 – 10.3.49.22	10.3.49.23
36	10.3.49.24/29	10.3.49.25 – 10.3.49.30	10.3.49.31
37	10.3.49.32/29	10.3.49.33 – 10.3.49.38	10.3.49.39
38	10.3.49.40/29	10.3.49.41 – 10.3.49.46	10.3.49.47
39	10.3.49.48/29	10.3.49.49 – 10.3.49.54	10.3.49.55
40	10.3.49.56/29	10.3.49.57 – 10.3.49.62	10.3.49.63
41	10.3.49.64/29	10.3.49.65 – 10.3.49.70	10.3.49.71
42	10.3.49.72/29	10.3.49.73 – 10.3.49.78	10.3.49.79
43	10.3.49.80/29	10.3.49.81 – 10.3.49.86	10.3.49.87
44	10.3.49.88/29	10.3.49.89 – 10.3.49.94	10.3.49.95
45	10.3.49.96/29	10.3.49.97 – 10.3.49.102	10.3.49.103
46	10.3.49.104/29	10.3.49.105 – 10.3.49.110	10.3.49.111
47	10.3.49.112/29	10.3.49.113 – 10.3.49.118	10.3.49.119
48	10.3.49.120/29	10.3.49.121 – 10.3.49.126	10.3.49.127
49	10.3.49.128/29	10.3.49.129 – 10.3.49.134	10.3.49.135
50	10.3.49.136/29	10.3.49.137 – 10.3.49.142	10.3.49.143
51	10.3.49.144/29	10.3.49.145 – 10.3.49.150	10.3.49.151
52	10.3.49.152/29	10.3.49.153 – 10.3.49.158	10.3.49.159
53	10.3.49.160/29	10.3.49.161 – 10.3.49.166	10.3.49.167
54	10.3.49.168/29	10.3.49.169 – 10.3.49.174	10.3.49.175
55	10.3.49.176/29	10.3.49.177 – 10.3.49.182	10.3.49.183
56	10.3.49.184/29	10.3.49.185 – 10.3.49.190	10.3.49.191
57	10.3.49.192/29	10.3.49.193 – 10.3.49.198	10.3.49.199
58	10.3.49.200/29	10.3.49.201 – 10.3.49.206	10.3.49.207
59	10.3.49.208/29	10.3.49.209 – 10.3.49.214	10.3.49.215
60	10.3.49.216/29	10.3.49.217 – 10.3.49.222	10.3.49.223
61	10.3.49.224/29	10.3.49.225 – 10.3.49.230	10.3.49.231
62	10.3.49.232/29	10.3.49.233 – 10.3.49.238	10.3.49.239
63	10.3.49.240/29	10.3.49.241 – 10.3.49.246	10.3.49.247
64	10.3.49.248/29	10.3.49.249 – 10.3.49.254	10.3.49.255
65	10.3.50.0/29	10.3.50.1 – 10.3.50.6	10.3.50.7
66	10.3.50.8/29	10.3.50.9 – 10.3.50.14	10.3.50.15
67	10.3.50.16/29	10.3.50.17 – 10.3.50.22	10.3.50.23
68	10.3.50.24/29	10.3.50.25 – 10.3.50.30	10.3.50.31
69	10.3.50.32/29	10.3.50.33 – 10.3.50.38	10.3.50.39
70	10.3.50.40/29	10.3.50.41 – 10.3.50.46	10.3.50.47
71	10.3.50.48/29	10.3.50.49 – 10.3.50.54	10.3.50.55
72	10.3.50.56/29	10.3.50.57 – 10.3.50.62	10.3.50.63
73	10.3.50.64/29	10.3.50.65 – 10.3.50.70	10.3.50.71
74	10.3.50.72/29	10.3.50.73 – 10.3.50.78	10.3.50.79
75	10.3.50.80/29	10.3.50.81 – 10.3.50.86	10.3.50.87
76	10.3.50.88/29	10.3.50.89 – 10.3.50.94	10.3.50.95
77	10.3.50.96/29	10.3.50.97 – 10.3.50.102	10.3.50.103
78	10.3.50.104/29	10.3.50.105 – 10.3.50.110	10.3.50.111
79	10.3.50.112/29	10.3.50.113 – 10.3.50.118	10.3.50.119
80	10.3.50.120/29	10.3.50.121 – 10.3.50.126	10.3.50.127
81	10.3.50.128/29	10.3.50.129 – 10.3.50.134	10.3.50.135
82	10.3.50.136/29	10.3.50.137 – 10.3.50.142	10.3.50.143
83	10.3.50.144/29	10.3.50.145 – 10.3.50.150	10.3.50.151
84	10.3.50.152/29	10.3.50.153 – 10.3.50.158	10.3.50.159
85	10.3.50.160/29	10.3.50.161 – 10.3.50.166	10.3.50.167
86	10.3.50.168/29	10.3.50.169 – 10.3.50.174	10.3.50.175
87	10.3.50.176/29	10.3.50.177 – 10.3.50.182	10.3.50.183
88	10.3.50.184/29	10.3.50.185 – 10.3.50.190	10.3.50.191
89	10.3.50.192/29	10.3.50.193 – 10.3.50.198	10.3.50.199
90	10.3.50.200/29	10.3.50.201 – 10.3.50.206	10.3.50.207
91	10.3.50.208/29	10.3.50.209 – 10.3.50.214	10.3.50.215
92	10.3.50.216/29	10.3.50.217 – 10.3.50.222	10.3.50.223
93	10.3.50.224/29	10.3.50.225 – 10.3.50.230	10.3.50.231
94	10.3.50.232/29	10.3.50.233 – 10.3.50.238	10.3.50.239
95	10.3.50.240/29	10.3.50.241 – 10.3.50.246	10.3.50.247
96	10.3.50.248/29	10.3.50.249 – 10.3.50.254	10.3.50.255
97	10.3.51.0/29	10.3.51.1 – 10.3.51.6	10.3.51.7
98	10.3.51.8/29	10.3.51.9 – 10.3.51.14	10.3.51.15
99	10.3.51.16/29	10.3.51.17 – 10.3.51.22	10.3.51.23
100	10.3.51.24/29	10.3.51.25 – 10.3.51.30	10.3.51.31
101	10.3.51.32/29	10.3.51.33 – 10.3.51.38	10.3.51.39
102	10.3.51.40/29	10.3.51.41 – 10.3.51.46	10.3.51.47
103	10.3.51.48/29	10.3.51.49 – 10.3.51.54	10.3.51.55
104	10.3.51.56/29	10.3.51.57 – 10.3.51.62	10.3.51.63
105	10.3.51.64/29	10.3.51.65 – 10.3.51.70	10.3.51.71
106	10.3.51.72/29	10.3.51.73 – 10.3.51.78	10.3.51.79
107	10.3.51.80/29	10.3.51.81 – 10.3.51.86	10.3.51.87
108	10.3.51.88/29	10.3.51.89 – 10.3.51.94	10.3.51.95
109	10.3.51.96/29	10.3.51.97 – 10.3.51.102	10.3.51.103
110	10.3.51.104/29	10.3.51.105 – 10.3.51.110	10.3.51.111
111	10.3.51.112/29	10.3.51.113 – 10.3.51.118	10.3.51.119
112	10.3.51.120/29	10.3.51.121 – 10.3.51.126	10.3.51.127
113	10.3.51.128/29	10.3.51.129 – 10.3.51.134	10.3.51.135
114	10.3.51.136/29	10.3.51.137 – 10.3.51.142	10.3.51.143
115	10.3.51.144/29	10.3.51.145 – 10.3.51.150	10.3.51.151
116	10.3.51.152/29	10.3.51.153 – 10.3.51.158	10.3.51.159
117	10.3.51.160/29	10.3.51.161 – 10.3.51.166	10.3.51.167
118	10.3.51.168/29	10.3.51.169 – 10.3.51.174	10.3.51.175
119	10.3.51.176/29	10.3.51.177 – 10.3.51.182	10.3.51.183
120	10.3.51.184/29	10.3.51.185 – 10.3.51.190	10.3.51.191
121	10.3.51.192/29	10.3.51.193 – 10.3.51.198	10.3.51.199
122	10.3.51.200/29	10.3.51.201 – 10.3.51.206	10.3.51.207
123	10.3.51.208/29	10.3.51.209 – 10.3.51.214	10.3.51.215
124	10.3.51.216/29	10.3.51.217 – 10.3.51.222	10.3.51.223
125	10.3.51.224/29	10.3.51.225 – 10.3.51.230	10.3.51.231
126	10.3.51.232/29	10.3.51.233 – 10.3.51.238	10.3.51.239
127	10.3.51.240/29	10.3.51.241 – 10.3.51.246	10.3.51.247
128	10.3.51.248/29	10.3.51.249 – 10.3.51.254	10.3.51.255
129	10.3.52.0/29	10.3.52.1 – 10.3.52.6	10.3.52.7
130	10.3.52.8/29	10.3.52.9 – 10.3.52.14	10.3.52.15
131	10.3.52.16/29	10.3.52.17 – 10.3.52.22	10.3.52.23
132	10.3.52.24/29	10.3.52.25 – 10.3.52.30	10.3.52.31
133	10.3.52.32/29	10.3.52.33 – 10.3.52.38	10.3.52.39
134	10.3.52.40/29	10.3.52.41 – 10.3.52.46	10.3.52.47
135	10.3.52.48/29	10.3.52.49 – 10.3.52.54	10.3.52.55
136	10.3.52.56/29	10.3.52.57 – 10.3.52.62	10.3.52.63
137	10.3.52.64/29	10.3.52.65 – 10.3.52.70	10.3.52.71
138	10.3.52.72/29	10.3.52.73 – 10.3.52.78	10.3.52.79
139	10.3.52.80/29	10.3.52.81 – 10.3.52.86	10.3.52.87
140	10.3.52.88/29	10.3.52.89 – 10.3.52.94	10.3.52.95
141	10.3.52.96/29	10.3.52.97 – 10.3.52.102	10.3.52.103
142	10.3.52.104/29	10.3.52.105 – 10.3.52.110	10.3.52.111
143	10.3.52.112/29	10.3.52.113 – 10.3.52.118	10.3.52.119
144	10.3.52.120/29	10.3.52.121 – 10.3.52.126	10.3.52.127
145	10.3.52.128/29	10.3.52.129 – 10.3.52.134	10.3.52.135
146	10.3.52.136/29	10.3.52.137 – 10.3.52.142	10.3.52.143
147	10.3.52.144/29	10.3.52.145 – 10.3.52.150	10.3.52.151
148	10.3.52.152/29	10.3.52.153 – 10.3.52.158	10.3.52.159
149	10.3.52.160/29	10.3.52.161 – 10.3.52.166	10.3.52.167
150	10.3.52.168/29	10.3.52.169 – 10.3.52.174	10.3.52.175
151	10.3.52.176/29	10.3.52.177 – 10.3.52.182	10.3.52.183
152	10.3.52.184/29	10.3.52.185 – 10.3.52.190	10.3.52.191
153	10.3.52.192/29	10.3.52.193 – 10.3.52.198	10.3.52.199
154	10.3.52.200/29	10.3.52.201 – 10.3.52.206	10.3.52.207
155	10.3.52.208/29	10.3.52.209 – 10.3.52.214	10.3.52.215
156	10.3.52.216/29	10.3.52.217 – 10.3.52.222	10.3.52.223
157	10.3.52.224/29	10.3.52.225 – 10.3.52.230	10.3.52.231
158	10.3.52.232/29	10.3.52.233 – 10.3.52.238	10.3.52.239
159	10.3.52.240/29	10.3.52.241 – 10.3.52.246	10.3.52.247
160	10.3.52.248/29	10.3.52.249 – 10.3.52.254	10.3.52.255
161	10.3.53.0/29	10.3.53.1 – 10.3.53.6	10.3.53.7
162	10.3.53.8/29	10.3.53.9 – 10.3.53.14	10.3.53.15
163	10.3.53.16/29	10.3.53.17 – 10.3.53.22	10.3.53.23
164	10.3.53.24/29	10.3.53.25 – 10.3.53.30	10.3.53.31
165	10.3.53.32/29	10.3.53.33 – 10.3.53.38	10.3.53.39
166	10.3.53.40/29	10.3.53.41 – 10.3.53.46	10.3.53.47
167	10.3.53.48/29	10.3.53.49 – 10.3.53.54	10.3.53.55
168	10.3.53.56/29	10.3.53.57 – 10.3.53.62	10.3.53.63
169	10.3.53.64/29	10.3.53.65 – 10.3.53.70	10.3.53.71
170	10.3.53.72/29	10.3.53.73 – 10.3.53.78	10.3.53.79
171	10.3.53.80/29	10.3.53.81 – 10.3.53.86	10.3.53.87
172	10.3.53.88/29	10.3.53.89 – 10.3.53.94	10.3.53.95
173	10.3.53.96/29	10.3.53.97 – 10.3.53.102	10.3.53.103
174	10.3.53.104/29	10.3.53.105 – 10.3.53.110	10.3.53.111
175	10.3.53.112/29	10.3.53.113 – 10.3.53.118	10.3.53.119
176	10.3.53.120/29	10.3.53.121 – 10.3.53.126	10.3.53.127
177	10.3.53.128/29	10.3.53.129 – 10.3.53.134	10.3.53.135
178	10.3.53.136/29	10.3.53.137 – 10.3.53.142	10.3.53.143
179	10.3.53.144/29	10.3.53.145 – 10.3.53.150	10.3.53.151
180	10.3.53.152/29	10.3.53.153 – 10.3.53.158	10.3.53.159
181	10.3.53.160/29	10.3.53.161 – 10.3.53.166	10.3.53.167
182	10.3.53.168/29	10.3.53.169 – 10.3.53.174	10.3.53.175
183	10.3.53.176/29	10.3.53.177 – 10.3.53.182	10.3.53.183
184	10.3.53.184/29	10.3.53.185 – 10.3.53.190	10.3.53.191
185	10.3.53.192/29	10.3.53.193 – 10.3.53.198	10.3.53.199
186	10.3.53.200/29	10.3.53.201 – 10.3.53.206	10.3.53.207
187	10.3.53.208/29	10.3.53.209 – 10.3.53.214	10.3.53.215
188	10.3.53.216/29	10.3.53.217 – 10.3.53.222	10.3.53.223
189	10.3.53.224/29	10.3.53.225 – 10.3.53.230	10.3.53.231
190	10.3.53.232/29	10.3.53.233 – 10.3.53.238	10.3.53.239
191	10.3.53.240/29	10.3.53.241 – 10.3.53.246	10.3.53.247
192	10.3.53.248/29	10.3.53.249 – 10.3.53.254	10.3.53.255
193	10.3.54.0/29	10.3.54.1 – 10.3.54.6	10.3.54.7
194	10.3.54.8/29	10.3.54.9 – 10.3.54.14	10.3.54.15
195	10.3.54.16/29	10.3.54.17 – 10.3.54.22	10.3.54.23
196	10.3.54.24/29	10.3.54.25 – 10.3.54.30	10.3.54.31
197	10.3.54.32/29	10.3.54.33 – 10.3.54.38	10.3.54.39
198	10.3.54.40/29	10.3.54.41 – 10.3.54.46	10.3.54.47
199	10.3.54.48/29	10.3.54.49 – 10.3.54.54	10.3.54.55
200	10.3.54.56/29	10.3.54.57 – 10.3.54.62	10.3.54.63
201	10.3.54.64/29	10.3.54.65 – 10.3.54.70	10.3.54.71
202	10.3.54.72/29	10.3.54.73 – 10.3.54.78	10.3.54.79
203	10.3.54.80/29	10.3.54.81 – 10.3.54.86	10.3.54.87
204	10.3.54.88/29	10.3.54.89 – 10.3.54.94	10.3.54.95
205	10.3.54.96/29	10.3.54.97 – 10.3.54.102	10.3.54.103
206	10.3.54.104/29	10.3.54.105 – 10.3.54.110	10.3.54.111
207	10.3.54.112/29	10.3.54.113 – 10.3.54.118	10.3.54.119
208	10.3.54.120/29	10.3.54.121 – 10.3.54.126	10.3.54.127
209	10.3.54.128/29	10.3.54.129 – 10.3.54.134	10.3.54.135
210	10.3.54.136/29	10.3.54.137 – 10.3.54.142	10.3.54.143
211	10.3.54.144/29	10.3.54.145 – 10.3.54.150	10.3.54.151
212	10.3.54.152/29	10.3.54.153 – 10.3.54.158	10.3.54.159
213	10.3.54.160/29	10.3.54.161 – 10.3.54.166	10.3.54.167
214	10.3.54.168/29	10.3.54.169 – 10.3.54.174	10.3.54.175
215	10.3.54.176/29	10.3.54.177 – 10.3.54.182	10.3.54.183
216	10.3.54.184/29	10.3.54.185 – 10.3.54.190	10.3.54.191
217	10.3.54.192/29	10.3.54.193 – 10.3.54.198	10.3.54.199
218	10.3.54.200/29	10.3.54.201 – 10.3.54.206	10.3.54.207
219	10.3.54.208/29	10.3.54.209 – 10.3.54.214	10.3.54.215
220	10.3.54.216/29	10.3.54.217 – 10.3.54.222	10.3.54.223
221	10.3.54.224/29	10.3.54.225 – 10.3.54.230	10.3.54.231
222	10.3.54.232/29	10.3.54.233 – 10.3.54.238	10.3.54.239
223	10.3.54.240/29	10.3.54.241 – 10.3.54.246	10.3.54.247
224	10.3.54.248/29	10.3.54.249 – 10.3.54.254	10.3.54.255
225	10.3.55.0/29	10.3.55.1 – 10.3.55.6	10.3.55.7
226	10.3.55.8/29	10.3.55.9 – 10.3.55.14	10.3.55.15
227	10.3.55.16/29	10.3.55.17 – 10.3.55.22	10.3.55.23
228	10.3.55.24/29	10.3.55.25 – 10.3.55.30	10.3.55.31
229	10.3.55.32/29	10.3.55.33 – 10.3.55.38	10.3.55.39
230	10.3.55.40/29	10.3.55.41 – 10.3.55.46	10.3.55.47
231	10.3.55.48/29	10.3.55.49 – 10.3.55.54	10.3.55.55
232	10.3.55.56/29	10.3.55.57 – 10.3.55.62	10.3.55.63
233	10.3.55.64/29	10.3.55.65 – 10.3.55.70	10.3.55.71
234	10.3.55.72/29	10.3.55.73 – 10.3.55.78	10.3.55.79
235	10.3.55.80/29	10.3.55.81 – 10.3.55.86	10.3.55.87
236	10.3.55.88/29	10.3.55.89 – 10.3.55.94	10.3.55.95
237	10.3.55.96/29	10.3.55.97 – 10.3.55.102	10.3.55.103
238	10.3.55.104/29	10.3.55.105 – 10.3.55.110	10.3.55.111
239	10.3.55.112/29	10.3.55.113 – 10.3.55.118	10.3.55.119
240	10.3.55.120/29	10.3.55.121 – 10.3.55.126	10.3.55.127
241	10.3.55.128/29	10.3.55.129 – 10.3.55.134	10.3.55.135
242	10.3.55.136/29	10.3.55.137 – 10.3.55.142	10.3.55.143
243	10.3.55.144/29	10.3.55.145 – 10.3.55.150	10.3.55.151
244	10.3.55.152/29	10.3.55.153 – 10.3.55.158	10.3.55.159
245	10.3.55.160/29	10.3.55.161 – 10.3.55.166	10.3.55.167
246	10.3.55.168/29	10.3.55.169 – 10.3.55.174	10.3.55.175
247	10.3.55.176/29	10.3.55.177 – 10.3.55.182	10.3.55.183
248	10.3.55.184/29	10.3.55.185 – 10.3.55.190	10.3.55.191
249	10.3.55.192/29	10.3.55.193 – 10.3.55.198	10.3.55.199
250	10.3.55.200/29	10.3.55.201 – 10.3.55.206	10.3.55.207
251	10.3.55.208/29	10.3.55.209 – 10.3.55.214	10.3.55.215
252	10.3.55.216/29	10.3.55.217 – 10.3.55.222	10.3.55.223
253	10.3.55.224/29	10.3.55.225 – 10.3.55.230	10.3.55.231
254	10.3.55.232/29	10.3.55.233 – 10.3.55.238	10.3.55.239
255	10.3.55.240/29	10.3.55.241 – 10.3.55.246	10.3.55.247
256	10.3.55.248/29	10.3.55.249 – 10.3.55.254	10.3.55.255

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 →