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)10.28.160.0/19

network10.28.160.0/19

broadcast10.28.191.255

first host10.28.160.1

last host10.28.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.28.160.0/19

address00001010.00011100.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011100.10100000.00000000

broadcast00001010.00011100.10111111.11111111

green = network part, grey = host part

hex0x0a1ca000

decimal169648128

reverse dns0.160.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:a000

/19 split into /29 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.28.160.0/29	10.28.160.1 – 10.28.160.6	10.28.160.7
2	10.28.160.8/29	10.28.160.9 – 10.28.160.14	10.28.160.15
3	10.28.160.16/29	10.28.160.17 – 10.28.160.22	10.28.160.23
4	10.28.160.24/29	10.28.160.25 – 10.28.160.30	10.28.160.31
5	10.28.160.32/29	10.28.160.33 – 10.28.160.38	10.28.160.39
6	10.28.160.40/29	10.28.160.41 – 10.28.160.46	10.28.160.47
7	10.28.160.48/29	10.28.160.49 – 10.28.160.54	10.28.160.55
8	10.28.160.56/29	10.28.160.57 – 10.28.160.62	10.28.160.63
9	10.28.160.64/29	10.28.160.65 – 10.28.160.70	10.28.160.71
10	10.28.160.72/29	10.28.160.73 – 10.28.160.78	10.28.160.79
11	10.28.160.80/29	10.28.160.81 – 10.28.160.86	10.28.160.87
12	10.28.160.88/29	10.28.160.89 – 10.28.160.94	10.28.160.95
13	10.28.160.96/29	10.28.160.97 – 10.28.160.102	10.28.160.103
14	10.28.160.104/29	10.28.160.105 – 10.28.160.110	10.28.160.111
15	10.28.160.112/29	10.28.160.113 – 10.28.160.118	10.28.160.119
16	10.28.160.120/29	10.28.160.121 – 10.28.160.126	10.28.160.127
17	10.28.160.128/29	10.28.160.129 – 10.28.160.134	10.28.160.135
18	10.28.160.136/29	10.28.160.137 – 10.28.160.142	10.28.160.143
19	10.28.160.144/29	10.28.160.145 – 10.28.160.150	10.28.160.151
20	10.28.160.152/29	10.28.160.153 – 10.28.160.158	10.28.160.159
21	10.28.160.160/29	10.28.160.161 – 10.28.160.166	10.28.160.167
22	10.28.160.168/29	10.28.160.169 – 10.28.160.174	10.28.160.175
23	10.28.160.176/29	10.28.160.177 – 10.28.160.182	10.28.160.183
24	10.28.160.184/29	10.28.160.185 – 10.28.160.190	10.28.160.191
25	10.28.160.192/29	10.28.160.193 – 10.28.160.198	10.28.160.199
26	10.28.160.200/29	10.28.160.201 – 10.28.160.206	10.28.160.207
27	10.28.160.208/29	10.28.160.209 – 10.28.160.214	10.28.160.215
28	10.28.160.216/29	10.28.160.217 – 10.28.160.222	10.28.160.223
29	10.28.160.224/29	10.28.160.225 – 10.28.160.230	10.28.160.231
30	10.28.160.232/29	10.28.160.233 – 10.28.160.238	10.28.160.239
31	10.28.160.240/29	10.28.160.241 – 10.28.160.246	10.28.160.247
32	10.28.160.248/29	10.28.160.249 – 10.28.160.254	10.28.160.255
33	10.28.161.0/29	10.28.161.1 – 10.28.161.6	10.28.161.7
34	10.28.161.8/29	10.28.161.9 – 10.28.161.14	10.28.161.15
35	10.28.161.16/29	10.28.161.17 – 10.28.161.22	10.28.161.23
36	10.28.161.24/29	10.28.161.25 – 10.28.161.30	10.28.161.31
37	10.28.161.32/29	10.28.161.33 – 10.28.161.38	10.28.161.39
38	10.28.161.40/29	10.28.161.41 – 10.28.161.46	10.28.161.47
39	10.28.161.48/29	10.28.161.49 – 10.28.161.54	10.28.161.55
40	10.28.161.56/29	10.28.161.57 – 10.28.161.62	10.28.161.63
41	10.28.161.64/29	10.28.161.65 – 10.28.161.70	10.28.161.71
42	10.28.161.72/29	10.28.161.73 – 10.28.161.78	10.28.161.79
43	10.28.161.80/29	10.28.161.81 – 10.28.161.86	10.28.161.87
44	10.28.161.88/29	10.28.161.89 – 10.28.161.94	10.28.161.95
45	10.28.161.96/29	10.28.161.97 – 10.28.161.102	10.28.161.103
46	10.28.161.104/29	10.28.161.105 – 10.28.161.110	10.28.161.111
47	10.28.161.112/29	10.28.161.113 – 10.28.161.118	10.28.161.119
48	10.28.161.120/29	10.28.161.121 – 10.28.161.126	10.28.161.127
49	10.28.161.128/29	10.28.161.129 – 10.28.161.134	10.28.161.135
50	10.28.161.136/29	10.28.161.137 – 10.28.161.142	10.28.161.143
51	10.28.161.144/29	10.28.161.145 – 10.28.161.150	10.28.161.151
52	10.28.161.152/29	10.28.161.153 – 10.28.161.158	10.28.161.159
53	10.28.161.160/29	10.28.161.161 – 10.28.161.166	10.28.161.167
54	10.28.161.168/29	10.28.161.169 – 10.28.161.174	10.28.161.175
55	10.28.161.176/29	10.28.161.177 – 10.28.161.182	10.28.161.183
56	10.28.161.184/29	10.28.161.185 – 10.28.161.190	10.28.161.191
57	10.28.161.192/29	10.28.161.193 – 10.28.161.198	10.28.161.199
58	10.28.161.200/29	10.28.161.201 – 10.28.161.206	10.28.161.207
59	10.28.161.208/29	10.28.161.209 – 10.28.161.214	10.28.161.215
60	10.28.161.216/29	10.28.161.217 – 10.28.161.222	10.28.161.223
61	10.28.161.224/29	10.28.161.225 – 10.28.161.230	10.28.161.231
62	10.28.161.232/29	10.28.161.233 – 10.28.161.238	10.28.161.239
63	10.28.161.240/29	10.28.161.241 – 10.28.161.246	10.28.161.247
64	10.28.161.248/29	10.28.161.249 – 10.28.161.254	10.28.161.255
65	10.28.162.0/29	10.28.162.1 – 10.28.162.6	10.28.162.7
66	10.28.162.8/29	10.28.162.9 – 10.28.162.14	10.28.162.15
67	10.28.162.16/29	10.28.162.17 – 10.28.162.22	10.28.162.23
68	10.28.162.24/29	10.28.162.25 – 10.28.162.30	10.28.162.31
69	10.28.162.32/29	10.28.162.33 – 10.28.162.38	10.28.162.39
70	10.28.162.40/29	10.28.162.41 – 10.28.162.46	10.28.162.47
71	10.28.162.48/29	10.28.162.49 – 10.28.162.54	10.28.162.55
72	10.28.162.56/29	10.28.162.57 – 10.28.162.62	10.28.162.63
73	10.28.162.64/29	10.28.162.65 – 10.28.162.70	10.28.162.71
74	10.28.162.72/29	10.28.162.73 – 10.28.162.78	10.28.162.79
75	10.28.162.80/29	10.28.162.81 – 10.28.162.86	10.28.162.87
76	10.28.162.88/29	10.28.162.89 – 10.28.162.94	10.28.162.95
77	10.28.162.96/29	10.28.162.97 – 10.28.162.102	10.28.162.103
78	10.28.162.104/29	10.28.162.105 – 10.28.162.110	10.28.162.111
79	10.28.162.112/29	10.28.162.113 – 10.28.162.118	10.28.162.119
80	10.28.162.120/29	10.28.162.121 – 10.28.162.126	10.28.162.127
81	10.28.162.128/29	10.28.162.129 – 10.28.162.134	10.28.162.135
82	10.28.162.136/29	10.28.162.137 – 10.28.162.142	10.28.162.143
83	10.28.162.144/29	10.28.162.145 – 10.28.162.150	10.28.162.151
84	10.28.162.152/29	10.28.162.153 – 10.28.162.158	10.28.162.159
85	10.28.162.160/29	10.28.162.161 – 10.28.162.166	10.28.162.167
86	10.28.162.168/29	10.28.162.169 – 10.28.162.174	10.28.162.175
87	10.28.162.176/29	10.28.162.177 – 10.28.162.182	10.28.162.183
88	10.28.162.184/29	10.28.162.185 – 10.28.162.190	10.28.162.191
89	10.28.162.192/29	10.28.162.193 – 10.28.162.198	10.28.162.199
90	10.28.162.200/29	10.28.162.201 – 10.28.162.206	10.28.162.207
91	10.28.162.208/29	10.28.162.209 – 10.28.162.214	10.28.162.215
92	10.28.162.216/29	10.28.162.217 – 10.28.162.222	10.28.162.223
93	10.28.162.224/29	10.28.162.225 – 10.28.162.230	10.28.162.231
94	10.28.162.232/29	10.28.162.233 – 10.28.162.238	10.28.162.239
95	10.28.162.240/29	10.28.162.241 – 10.28.162.246	10.28.162.247
96	10.28.162.248/29	10.28.162.249 – 10.28.162.254	10.28.162.255
97	10.28.163.0/29	10.28.163.1 – 10.28.163.6	10.28.163.7
98	10.28.163.8/29	10.28.163.9 – 10.28.163.14	10.28.163.15
99	10.28.163.16/29	10.28.163.17 – 10.28.163.22	10.28.163.23
100	10.28.163.24/29	10.28.163.25 – 10.28.163.30	10.28.163.31
101	10.28.163.32/29	10.28.163.33 – 10.28.163.38	10.28.163.39
102	10.28.163.40/29	10.28.163.41 – 10.28.163.46	10.28.163.47
103	10.28.163.48/29	10.28.163.49 – 10.28.163.54	10.28.163.55
104	10.28.163.56/29	10.28.163.57 – 10.28.163.62	10.28.163.63
105	10.28.163.64/29	10.28.163.65 – 10.28.163.70	10.28.163.71
106	10.28.163.72/29	10.28.163.73 – 10.28.163.78	10.28.163.79
107	10.28.163.80/29	10.28.163.81 – 10.28.163.86	10.28.163.87
108	10.28.163.88/29	10.28.163.89 – 10.28.163.94	10.28.163.95
109	10.28.163.96/29	10.28.163.97 – 10.28.163.102	10.28.163.103
110	10.28.163.104/29	10.28.163.105 – 10.28.163.110	10.28.163.111
111	10.28.163.112/29	10.28.163.113 – 10.28.163.118	10.28.163.119
112	10.28.163.120/29	10.28.163.121 – 10.28.163.126	10.28.163.127
113	10.28.163.128/29	10.28.163.129 – 10.28.163.134	10.28.163.135
114	10.28.163.136/29	10.28.163.137 – 10.28.163.142	10.28.163.143
115	10.28.163.144/29	10.28.163.145 – 10.28.163.150	10.28.163.151
116	10.28.163.152/29	10.28.163.153 – 10.28.163.158	10.28.163.159
117	10.28.163.160/29	10.28.163.161 – 10.28.163.166	10.28.163.167
118	10.28.163.168/29	10.28.163.169 – 10.28.163.174	10.28.163.175
119	10.28.163.176/29	10.28.163.177 – 10.28.163.182	10.28.163.183
120	10.28.163.184/29	10.28.163.185 – 10.28.163.190	10.28.163.191
121	10.28.163.192/29	10.28.163.193 – 10.28.163.198	10.28.163.199
122	10.28.163.200/29	10.28.163.201 – 10.28.163.206	10.28.163.207
123	10.28.163.208/29	10.28.163.209 – 10.28.163.214	10.28.163.215
124	10.28.163.216/29	10.28.163.217 – 10.28.163.222	10.28.163.223
125	10.28.163.224/29	10.28.163.225 – 10.28.163.230	10.28.163.231
126	10.28.163.232/29	10.28.163.233 – 10.28.163.238	10.28.163.239
127	10.28.163.240/29	10.28.163.241 – 10.28.163.246	10.28.163.247
128	10.28.163.248/29	10.28.163.249 – 10.28.163.254	10.28.163.255
129	10.28.164.0/29	10.28.164.1 – 10.28.164.6	10.28.164.7
130	10.28.164.8/29	10.28.164.9 – 10.28.164.14	10.28.164.15
131	10.28.164.16/29	10.28.164.17 – 10.28.164.22	10.28.164.23
132	10.28.164.24/29	10.28.164.25 – 10.28.164.30	10.28.164.31
133	10.28.164.32/29	10.28.164.33 – 10.28.164.38	10.28.164.39
134	10.28.164.40/29	10.28.164.41 – 10.28.164.46	10.28.164.47
135	10.28.164.48/29	10.28.164.49 – 10.28.164.54	10.28.164.55
136	10.28.164.56/29	10.28.164.57 – 10.28.164.62	10.28.164.63
137	10.28.164.64/29	10.28.164.65 – 10.28.164.70	10.28.164.71
138	10.28.164.72/29	10.28.164.73 – 10.28.164.78	10.28.164.79
139	10.28.164.80/29	10.28.164.81 – 10.28.164.86	10.28.164.87
140	10.28.164.88/29	10.28.164.89 – 10.28.164.94	10.28.164.95
141	10.28.164.96/29	10.28.164.97 – 10.28.164.102	10.28.164.103
142	10.28.164.104/29	10.28.164.105 – 10.28.164.110	10.28.164.111
143	10.28.164.112/29	10.28.164.113 – 10.28.164.118	10.28.164.119
144	10.28.164.120/29	10.28.164.121 – 10.28.164.126	10.28.164.127
145	10.28.164.128/29	10.28.164.129 – 10.28.164.134	10.28.164.135
146	10.28.164.136/29	10.28.164.137 – 10.28.164.142	10.28.164.143
147	10.28.164.144/29	10.28.164.145 – 10.28.164.150	10.28.164.151
148	10.28.164.152/29	10.28.164.153 – 10.28.164.158	10.28.164.159
149	10.28.164.160/29	10.28.164.161 – 10.28.164.166	10.28.164.167
150	10.28.164.168/29	10.28.164.169 – 10.28.164.174	10.28.164.175
151	10.28.164.176/29	10.28.164.177 – 10.28.164.182	10.28.164.183
152	10.28.164.184/29	10.28.164.185 – 10.28.164.190	10.28.164.191
153	10.28.164.192/29	10.28.164.193 – 10.28.164.198	10.28.164.199
154	10.28.164.200/29	10.28.164.201 – 10.28.164.206	10.28.164.207
155	10.28.164.208/29	10.28.164.209 – 10.28.164.214	10.28.164.215
156	10.28.164.216/29	10.28.164.217 – 10.28.164.222	10.28.164.223
157	10.28.164.224/29	10.28.164.225 – 10.28.164.230	10.28.164.231
158	10.28.164.232/29	10.28.164.233 – 10.28.164.238	10.28.164.239
159	10.28.164.240/29	10.28.164.241 – 10.28.164.246	10.28.164.247
160	10.28.164.248/29	10.28.164.249 – 10.28.164.254	10.28.164.255
161	10.28.165.0/29	10.28.165.1 – 10.28.165.6	10.28.165.7
162	10.28.165.8/29	10.28.165.9 – 10.28.165.14	10.28.165.15
163	10.28.165.16/29	10.28.165.17 – 10.28.165.22	10.28.165.23
164	10.28.165.24/29	10.28.165.25 – 10.28.165.30	10.28.165.31
165	10.28.165.32/29	10.28.165.33 – 10.28.165.38	10.28.165.39
166	10.28.165.40/29	10.28.165.41 – 10.28.165.46	10.28.165.47
167	10.28.165.48/29	10.28.165.49 – 10.28.165.54	10.28.165.55
168	10.28.165.56/29	10.28.165.57 – 10.28.165.62	10.28.165.63
169	10.28.165.64/29	10.28.165.65 – 10.28.165.70	10.28.165.71
170	10.28.165.72/29	10.28.165.73 – 10.28.165.78	10.28.165.79
171	10.28.165.80/29	10.28.165.81 – 10.28.165.86	10.28.165.87
172	10.28.165.88/29	10.28.165.89 – 10.28.165.94	10.28.165.95
173	10.28.165.96/29	10.28.165.97 – 10.28.165.102	10.28.165.103
174	10.28.165.104/29	10.28.165.105 – 10.28.165.110	10.28.165.111
175	10.28.165.112/29	10.28.165.113 – 10.28.165.118	10.28.165.119
176	10.28.165.120/29	10.28.165.121 – 10.28.165.126	10.28.165.127
177	10.28.165.128/29	10.28.165.129 – 10.28.165.134	10.28.165.135
178	10.28.165.136/29	10.28.165.137 – 10.28.165.142	10.28.165.143
179	10.28.165.144/29	10.28.165.145 – 10.28.165.150	10.28.165.151
180	10.28.165.152/29	10.28.165.153 – 10.28.165.158	10.28.165.159
181	10.28.165.160/29	10.28.165.161 – 10.28.165.166	10.28.165.167
182	10.28.165.168/29	10.28.165.169 – 10.28.165.174	10.28.165.175
183	10.28.165.176/29	10.28.165.177 – 10.28.165.182	10.28.165.183
184	10.28.165.184/29	10.28.165.185 – 10.28.165.190	10.28.165.191
185	10.28.165.192/29	10.28.165.193 – 10.28.165.198	10.28.165.199
186	10.28.165.200/29	10.28.165.201 – 10.28.165.206	10.28.165.207
187	10.28.165.208/29	10.28.165.209 – 10.28.165.214	10.28.165.215
188	10.28.165.216/29	10.28.165.217 – 10.28.165.222	10.28.165.223
189	10.28.165.224/29	10.28.165.225 – 10.28.165.230	10.28.165.231
190	10.28.165.232/29	10.28.165.233 – 10.28.165.238	10.28.165.239
191	10.28.165.240/29	10.28.165.241 – 10.28.165.246	10.28.165.247
192	10.28.165.248/29	10.28.165.249 – 10.28.165.254	10.28.165.255
193	10.28.166.0/29	10.28.166.1 – 10.28.166.6	10.28.166.7
194	10.28.166.8/29	10.28.166.9 – 10.28.166.14	10.28.166.15
195	10.28.166.16/29	10.28.166.17 – 10.28.166.22	10.28.166.23
196	10.28.166.24/29	10.28.166.25 – 10.28.166.30	10.28.166.31
197	10.28.166.32/29	10.28.166.33 – 10.28.166.38	10.28.166.39
198	10.28.166.40/29	10.28.166.41 – 10.28.166.46	10.28.166.47
199	10.28.166.48/29	10.28.166.49 – 10.28.166.54	10.28.166.55
200	10.28.166.56/29	10.28.166.57 – 10.28.166.62	10.28.166.63
201	10.28.166.64/29	10.28.166.65 – 10.28.166.70	10.28.166.71
202	10.28.166.72/29	10.28.166.73 – 10.28.166.78	10.28.166.79
203	10.28.166.80/29	10.28.166.81 – 10.28.166.86	10.28.166.87
204	10.28.166.88/29	10.28.166.89 – 10.28.166.94	10.28.166.95
205	10.28.166.96/29	10.28.166.97 – 10.28.166.102	10.28.166.103
206	10.28.166.104/29	10.28.166.105 – 10.28.166.110	10.28.166.111
207	10.28.166.112/29	10.28.166.113 – 10.28.166.118	10.28.166.119
208	10.28.166.120/29	10.28.166.121 – 10.28.166.126	10.28.166.127
209	10.28.166.128/29	10.28.166.129 – 10.28.166.134	10.28.166.135
210	10.28.166.136/29	10.28.166.137 – 10.28.166.142	10.28.166.143
211	10.28.166.144/29	10.28.166.145 – 10.28.166.150	10.28.166.151
212	10.28.166.152/29	10.28.166.153 – 10.28.166.158	10.28.166.159
213	10.28.166.160/29	10.28.166.161 – 10.28.166.166	10.28.166.167
214	10.28.166.168/29	10.28.166.169 – 10.28.166.174	10.28.166.175
215	10.28.166.176/29	10.28.166.177 – 10.28.166.182	10.28.166.183
216	10.28.166.184/29	10.28.166.185 – 10.28.166.190	10.28.166.191
217	10.28.166.192/29	10.28.166.193 – 10.28.166.198	10.28.166.199
218	10.28.166.200/29	10.28.166.201 – 10.28.166.206	10.28.166.207
219	10.28.166.208/29	10.28.166.209 – 10.28.166.214	10.28.166.215
220	10.28.166.216/29	10.28.166.217 – 10.28.166.222	10.28.166.223
221	10.28.166.224/29	10.28.166.225 – 10.28.166.230	10.28.166.231
222	10.28.166.232/29	10.28.166.233 – 10.28.166.238	10.28.166.239
223	10.28.166.240/29	10.28.166.241 – 10.28.166.246	10.28.166.247
224	10.28.166.248/29	10.28.166.249 – 10.28.166.254	10.28.166.255
225	10.28.167.0/29	10.28.167.1 – 10.28.167.6	10.28.167.7
226	10.28.167.8/29	10.28.167.9 – 10.28.167.14	10.28.167.15
227	10.28.167.16/29	10.28.167.17 – 10.28.167.22	10.28.167.23
228	10.28.167.24/29	10.28.167.25 – 10.28.167.30	10.28.167.31
229	10.28.167.32/29	10.28.167.33 – 10.28.167.38	10.28.167.39
230	10.28.167.40/29	10.28.167.41 – 10.28.167.46	10.28.167.47
231	10.28.167.48/29	10.28.167.49 – 10.28.167.54	10.28.167.55
232	10.28.167.56/29	10.28.167.57 – 10.28.167.62	10.28.167.63
233	10.28.167.64/29	10.28.167.65 – 10.28.167.70	10.28.167.71
234	10.28.167.72/29	10.28.167.73 – 10.28.167.78	10.28.167.79
235	10.28.167.80/29	10.28.167.81 – 10.28.167.86	10.28.167.87
236	10.28.167.88/29	10.28.167.89 – 10.28.167.94	10.28.167.95
237	10.28.167.96/29	10.28.167.97 – 10.28.167.102	10.28.167.103
238	10.28.167.104/29	10.28.167.105 – 10.28.167.110	10.28.167.111
239	10.28.167.112/29	10.28.167.113 – 10.28.167.118	10.28.167.119
240	10.28.167.120/29	10.28.167.121 – 10.28.167.126	10.28.167.127
241	10.28.167.128/29	10.28.167.129 – 10.28.167.134	10.28.167.135
242	10.28.167.136/29	10.28.167.137 – 10.28.167.142	10.28.167.143
243	10.28.167.144/29	10.28.167.145 – 10.28.167.150	10.28.167.151
244	10.28.167.152/29	10.28.167.153 – 10.28.167.158	10.28.167.159
245	10.28.167.160/29	10.28.167.161 – 10.28.167.166	10.28.167.167
246	10.28.167.168/29	10.28.167.169 – 10.28.167.174	10.28.167.175
247	10.28.167.176/29	10.28.167.177 – 10.28.167.182	10.28.167.183
248	10.28.167.184/29	10.28.167.185 – 10.28.167.190	10.28.167.191
249	10.28.167.192/29	10.28.167.193 – 10.28.167.198	10.28.167.199
250	10.28.167.200/29	10.28.167.201 – 10.28.167.206	10.28.167.207
251	10.28.167.208/29	10.28.167.209 – 10.28.167.214	10.28.167.215
252	10.28.167.216/29	10.28.167.217 – 10.28.167.222	10.28.167.223
253	10.28.167.224/29	10.28.167.225 – 10.28.167.230	10.28.167.231
254	10.28.167.232/29	10.28.167.233 – 10.28.167.238	10.28.167.239
255	10.28.167.240/29	10.28.167.241 – 10.28.167.246	10.28.167.247
256	10.28.167.248/29	10.28.167.249 – 10.28.167.254	10.28.167.255

showing 256 of 1,024

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →