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)10.59.192.0/18

network10.59.192.0/18

broadcast10.59.255.255

first host10.59.192.1

last host10.59.255.254

subnet mask255.255.192.0

wildcard0.0.63.255

addresses16,384

usable hosts16,382

classA

ipcalc 10.59.192.0/18

address00001010.00111011.11000000.00000000

subnet mask11111111.11111111.11000000.00000000

network00001010.00111011.11000000.00000000

broadcast00001010.00111011.11111111.11111111

green = network part, grey = host part

hex0x0a3bc000

decimal171687936

reverse dns0.192.59.10.in-addr.arpa

ipv4-mapped::ffff:a3b:c000

/18 split into /29 · 2,048 subnets

close ×

#	network	host range	broadcast
1	10.59.192.0/29	10.59.192.1 – 10.59.192.6	10.59.192.7
2	10.59.192.8/29	10.59.192.9 – 10.59.192.14	10.59.192.15
3	10.59.192.16/29	10.59.192.17 – 10.59.192.22	10.59.192.23
4	10.59.192.24/29	10.59.192.25 – 10.59.192.30	10.59.192.31
5	10.59.192.32/29	10.59.192.33 – 10.59.192.38	10.59.192.39
6	10.59.192.40/29	10.59.192.41 – 10.59.192.46	10.59.192.47
7	10.59.192.48/29	10.59.192.49 – 10.59.192.54	10.59.192.55
8	10.59.192.56/29	10.59.192.57 – 10.59.192.62	10.59.192.63
9	10.59.192.64/29	10.59.192.65 – 10.59.192.70	10.59.192.71
10	10.59.192.72/29	10.59.192.73 – 10.59.192.78	10.59.192.79
11	10.59.192.80/29	10.59.192.81 – 10.59.192.86	10.59.192.87
12	10.59.192.88/29	10.59.192.89 – 10.59.192.94	10.59.192.95
13	10.59.192.96/29	10.59.192.97 – 10.59.192.102	10.59.192.103
14	10.59.192.104/29	10.59.192.105 – 10.59.192.110	10.59.192.111
15	10.59.192.112/29	10.59.192.113 – 10.59.192.118	10.59.192.119
16	10.59.192.120/29	10.59.192.121 – 10.59.192.126	10.59.192.127
17	10.59.192.128/29	10.59.192.129 – 10.59.192.134	10.59.192.135
18	10.59.192.136/29	10.59.192.137 – 10.59.192.142	10.59.192.143
19	10.59.192.144/29	10.59.192.145 – 10.59.192.150	10.59.192.151
20	10.59.192.152/29	10.59.192.153 – 10.59.192.158	10.59.192.159
21	10.59.192.160/29	10.59.192.161 – 10.59.192.166	10.59.192.167
22	10.59.192.168/29	10.59.192.169 – 10.59.192.174	10.59.192.175
23	10.59.192.176/29	10.59.192.177 – 10.59.192.182	10.59.192.183
24	10.59.192.184/29	10.59.192.185 – 10.59.192.190	10.59.192.191
25	10.59.192.192/29	10.59.192.193 – 10.59.192.198	10.59.192.199
26	10.59.192.200/29	10.59.192.201 – 10.59.192.206	10.59.192.207
27	10.59.192.208/29	10.59.192.209 – 10.59.192.214	10.59.192.215
28	10.59.192.216/29	10.59.192.217 – 10.59.192.222	10.59.192.223
29	10.59.192.224/29	10.59.192.225 – 10.59.192.230	10.59.192.231
30	10.59.192.232/29	10.59.192.233 – 10.59.192.238	10.59.192.239
31	10.59.192.240/29	10.59.192.241 – 10.59.192.246	10.59.192.247
32	10.59.192.248/29	10.59.192.249 – 10.59.192.254	10.59.192.255
33	10.59.193.0/29	10.59.193.1 – 10.59.193.6	10.59.193.7
34	10.59.193.8/29	10.59.193.9 – 10.59.193.14	10.59.193.15
35	10.59.193.16/29	10.59.193.17 – 10.59.193.22	10.59.193.23
36	10.59.193.24/29	10.59.193.25 – 10.59.193.30	10.59.193.31
37	10.59.193.32/29	10.59.193.33 – 10.59.193.38	10.59.193.39
38	10.59.193.40/29	10.59.193.41 – 10.59.193.46	10.59.193.47
39	10.59.193.48/29	10.59.193.49 – 10.59.193.54	10.59.193.55
40	10.59.193.56/29	10.59.193.57 – 10.59.193.62	10.59.193.63
41	10.59.193.64/29	10.59.193.65 – 10.59.193.70	10.59.193.71
42	10.59.193.72/29	10.59.193.73 – 10.59.193.78	10.59.193.79
43	10.59.193.80/29	10.59.193.81 – 10.59.193.86	10.59.193.87
44	10.59.193.88/29	10.59.193.89 – 10.59.193.94	10.59.193.95
45	10.59.193.96/29	10.59.193.97 – 10.59.193.102	10.59.193.103
46	10.59.193.104/29	10.59.193.105 – 10.59.193.110	10.59.193.111
47	10.59.193.112/29	10.59.193.113 – 10.59.193.118	10.59.193.119
48	10.59.193.120/29	10.59.193.121 – 10.59.193.126	10.59.193.127
49	10.59.193.128/29	10.59.193.129 – 10.59.193.134	10.59.193.135
50	10.59.193.136/29	10.59.193.137 – 10.59.193.142	10.59.193.143
51	10.59.193.144/29	10.59.193.145 – 10.59.193.150	10.59.193.151
52	10.59.193.152/29	10.59.193.153 – 10.59.193.158	10.59.193.159
53	10.59.193.160/29	10.59.193.161 – 10.59.193.166	10.59.193.167
54	10.59.193.168/29	10.59.193.169 – 10.59.193.174	10.59.193.175
55	10.59.193.176/29	10.59.193.177 – 10.59.193.182	10.59.193.183
56	10.59.193.184/29	10.59.193.185 – 10.59.193.190	10.59.193.191
57	10.59.193.192/29	10.59.193.193 – 10.59.193.198	10.59.193.199
58	10.59.193.200/29	10.59.193.201 – 10.59.193.206	10.59.193.207
59	10.59.193.208/29	10.59.193.209 – 10.59.193.214	10.59.193.215
60	10.59.193.216/29	10.59.193.217 – 10.59.193.222	10.59.193.223
61	10.59.193.224/29	10.59.193.225 – 10.59.193.230	10.59.193.231
62	10.59.193.232/29	10.59.193.233 – 10.59.193.238	10.59.193.239
63	10.59.193.240/29	10.59.193.241 – 10.59.193.246	10.59.193.247
64	10.59.193.248/29	10.59.193.249 – 10.59.193.254	10.59.193.255
65	10.59.194.0/29	10.59.194.1 – 10.59.194.6	10.59.194.7
66	10.59.194.8/29	10.59.194.9 – 10.59.194.14	10.59.194.15
67	10.59.194.16/29	10.59.194.17 – 10.59.194.22	10.59.194.23
68	10.59.194.24/29	10.59.194.25 – 10.59.194.30	10.59.194.31
69	10.59.194.32/29	10.59.194.33 – 10.59.194.38	10.59.194.39
70	10.59.194.40/29	10.59.194.41 – 10.59.194.46	10.59.194.47
71	10.59.194.48/29	10.59.194.49 – 10.59.194.54	10.59.194.55
72	10.59.194.56/29	10.59.194.57 – 10.59.194.62	10.59.194.63
73	10.59.194.64/29	10.59.194.65 – 10.59.194.70	10.59.194.71
74	10.59.194.72/29	10.59.194.73 – 10.59.194.78	10.59.194.79
75	10.59.194.80/29	10.59.194.81 – 10.59.194.86	10.59.194.87
76	10.59.194.88/29	10.59.194.89 – 10.59.194.94	10.59.194.95
77	10.59.194.96/29	10.59.194.97 – 10.59.194.102	10.59.194.103
78	10.59.194.104/29	10.59.194.105 – 10.59.194.110	10.59.194.111
79	10.59.194.112/29	10.59.194.113 – 10.59.194.118	10.59.194.119
80	10.59.194.120/29	10.59.194.121 – 10.59.194.126	10.59.194.127
81	10.59.194.128/29	10.59.194.129 – 10.59.194.134	10.59.194.135
82	10.59.194.136/29	10.59.194.137 – 10.59.194.142	10.59.194.143
83	10.59.194.144/29	10.59.194.145 – 10.59.194.150	10.59.194.151
84	10.59.194.152/29	10.59.194.153 – 10.59.194.158	10.59.194.159
85	10.59.194.160/29	10.59.194.161 – 10.59.194.166	10.59.194.167
86	10.59.194.168/29	10.59.194.169 – 10.59.194.174	10.59.194.175
87	10.59.194.176/29	10.59.194.177 – 10.59.194.182	10.59.194.183
88	10.59.194.184/29	10.59.194.185 – 10.59.194.190	10.59.194.191
89	10.59.194.192/29	10.59.194.193 – 10.59.194.198	10.59.194.199
90	10.59.194.200/29	10.59.194.201 – 10.59.194.206	10.59.194.207
91	10.59.194.208/29	10.59.194.209 – 10.59.194.214	10.59.194.215
92	10.59.194.216/29	10.59.194.217 – 10.59.194.222	10.59.194.223
93	10.59.194.224/29	10.59.194.225 – 10.59.194.230	10.59.194.231
94	10.59.194.232/29	10.59.194.233 – 10.59.194.238	10.59.194.239
95	10.59.194.240/29	10.59.194.241 – 10.59.194.246	10.59.194.247
96	10.59.194.248/29	10.59.194.249 – 10.59.194.254	10.59.194.255
97	10.59.195.0/29	10.59.195.1 – 10.59.195.6	10.59.195.7
98	10.59.195.8/29	10.59.195.9 – 10.59.195.14	10.59.195.15
99	10.59.195.16/29	10.59.195.17 – 10.59.195.22	10.59.195.23
100	10.59.195.24/29	10.59.195.25 – 10.59.195.30	10.59.195.31
101	10.59.195.32/29	10.59.195.33 – 10.59.195.38	10.59.195.39
102	10.59.195.40/29	10.59.195.41 – 10.59.195.46	10.59.195.47
103	10.59.195.48/29	10.59.195.49 – 10.59.195.54	10.59.195.55
104	10.59.195.56/29	10.59.195.57 – 10.59.195.62	10.59.195.63
105	10.59.195.64/29	10.59.195.65 – 10.59.195.70	10.59.195.71
106	10.59.195.72/29	10.59.195.73 – 10.59.195.78	10.59.195.79
107	10.59.195.80/29	10.59.195.81 – 10.59.195.86	10.59.195.87
108	10.59.195.88/29	10.59.195.89 – 10.59.195.94	10.59.195.95
109	10.59.195.96/29	10.59.195.97 – 10.59.195.102	10.59.195.103
110	10.59.195.104/29	10.59.195.105 – 10.59.195.110	10.59.195.111
111	10.59.195.112/29	10.59.195.113 – 10.59.195.118	10.59.195.119
112	10.59.195.120/29	10.59.195.121 – 10.59.195.126	10.59.195.127
113	10.59.195.128/29	10.59.195.129 – 10.59.195.134	10.59.195.135
114	10.59.195.136/29	10.59.195.137 – 10.59.195.142	10.59.195.143
115	10.59.195.144/29	10.59.195.145 – 10.59.195.150	10.59.195.151
116	10.59.195.152/29	10.59.195.153 – 10.59.195.158	10.59.195.159
117	10.59.195.160/29	10.59.195.161 – 10.59.195.166	10.59.195.167
118	10.59.195.168/29	10.59.195.169 – 10.59.195.174	10.59.195.175
119	10.59.195.176/29	10.59.195.177 – 10.59.195.182	10.59.195.183
120	10.59.195.184/29	10.59.195.185 – 10.59.195.190	10.59.195.191
121	10.59.195.192/29	10.59.195.193 – 10.59.195.198	10.59.195.199
122	10.59.195.200/29	10.59.195.201 – 10.59.195.206	10.59.195.207
123	10.59.195.208/29	10.59.195.209 – 10.59.195.214	10.59.195.215
124	10.59.195.216/29	10.59.195.217 – 10.59.195.222	10.59.195.223
125	10.59.195.224/29	10.59.195.225 – 10.59.195.230	10.59.195.231
126	10.59.195.232/29	10.59.195.233 – 10.59.195.238	10.59.195.239
127	10.59.195.240/29	10.59.195.241 – 10.59.195.246	10.59.195.247
128	10.59.195.248/29	10.59.195.249 – 10.59.195.254	10.59.195.255
129	10.59.196.0/29	10.59.196.1 – 10.59.196.6	10.59.196.7
130	10.59.196.8/29	10.59.196.9 – 10.59.196.14	10.59.196.15
131	10.59.196.16/29	10.59.196.17 – 10.59.196.22	10.59.196.23
132	10.59.196.24/29	10.59.196.25 – 10.59.196.30	10.59.196.31
133	10.59.196.32/29	10.59.196.33 – 10.59.196.38	10.59.196.39
134	10.59.196.40/29	10.59.196.41 – 10.59.196.46	10.59.196.47
135	10.59.196.48/29	10.59.196.49 – 10.59.196.54	10.59.196.55
136	10.59.196.56/29	10.59.196.57 – 10.59.196.62	10.59.196.63
137	10.59.196.64/29	10.59.196.65 – 10.59.196.70	10.59.196.71
138	10.59.196.72/29	10.59.196.73 – 10.59.196.78	10.59.196.79
139	10.59.196.80/29	10.59.196.81 – 10.59.196.86	10.59.196.87
140	10.59.196.88/29	10.59.196.89 – 10.59.196.94	10.59.196.95
141	10.59.196.96/29	10.59.196.97 – 10.59.196.102	10.59.196.103
142	10.59.196.104/29	10.59.196.105 – 10.59.196.110	10.59.196.111
143	10.59.196.112/29	10.59.196.113 – 10.59.196.118	10.59.196.119
144	10.59.196.120/29	10.59.196.121 – 10.59.196.126	10.59.196.127
145	10.59.196.128/29	10.59.196.129 – 10.59.196.134	10.59.196.135
146	10.59.196.136/29	10.59.196.137 – 10.59.196.142	10.59.196.143
147	10.59.196.144/29	10.59.196.145 – 10.59.196.150	10.59.196.151
148	10.59.196.152/29	10.59.196.153 – 10.59.196.158	10.59.196.159
149	10.59.196.160/29	10.59.196.161 – 10.59.196.166	10.59.196.167
150	10.59.196.168/29	10.59.196.169 – 10.59.196.174	10.59.196.175
151	10.59.196.176/29	10.59.196.177 – 10.59.196.182	10.59.196.183
152	10.59.196.184/29	10.59.196.185 – 10.59.196.190	10.59.196.191
153	10.59.196.192/29	10.59.196.193 – 10.59.196.198	10.59.196.199
154	10.59.196.200/29	10.59.196.201 – 10.59.196.206	10.59.196.207
155	10.59.196.208/29	10.59.196.209 – 10.59.196.214	10.59.196.215
156	10.59.196.216/29	10.59.196.217 – 10.59.196.222	10.59.196.223
157	10.59.196.224/29	10.59.196.225 – 10.59.196.230	10.59.196.231
158	10.59.196.232/29	10.59.196.233 – 10.59.196.238	10.59.196.239
159	10.59.196.240/29	10.59.196.241 – 10.59.196.246	10.59.196.247
160	10.59.196.248/29	10.59.196.249 – 10.59.196.254	10.59.196.255
161	10.59.197.0/29	10.59.197.1 – 10.59.197.6	10.59.197.7
162	10.59.197.8/29	10.59.197.9 – 10.59.197.14	10.59.197.15
163	10.59.197.16/29	10.59.197.17 – 10.59.197.22	10.59.197.23
164	10.59.197.24/29	10.59.197.25 – 10.59.197.30	10.59.197.31
165	10.59.197.32/29	10.59.197.33 – 10.59.197.38	10.59.197.39
166	10.59.197.40/29	10.59.197.41 – 10.59.197.46	10.59.197.47
167	10.59.197.48/29	10.59.197.49 – 10.59.197.54	10.59.197.55
168	10.59.197.56/29	10.59.197.57 – 10.59.197.62	10.59.197.63
169	10.59.197.64/29	10.59.197.65 – 10.59.197.70	10.59.197.71
170	10.59.197.72/29	10.59.197.73 – 10.59.197.78	10.59.197.79
171	10.59.197.80/29	10.59.197.81 – 10.59.197.86	10.59.197.87
172	10.59.197.88/29	10.59.197.89 – 10.59.197.94	10.59.197.95
173	10.59.197.96/29	10.59.197.97 – 10.59.197.102	10.59.197.103
174	10.59.197.104/29	10.59.197.105 – 10.59.197.110	10.59.197.111
175	10.59.197.112/29	10.59.197.113 – 10.59.197.118	10.59.197.119
176	10.59.197.120/29	10.59.197.121 – 10.59.197.126	10.59.197.127
177	10.59.197.128/29	10.59.197.129 – 10.59.197.134	10.59.197.135
178	10.59.197.136/29	10.59.197.137 – 10.59.197.142	10.59.197.143
179	10.59.197.144/29	10.59.197.145 – 10.59.197.150	10.59.197.151
180	10.59.197.152/29	10.59.197.153 – 10.59.197.158	10.59.197.159
181	10.59.197.160/29	10.59.197.161 – 10.59.197.166	10.59.197.167
182	10.59.197.168/29	10.59.197.169 – 10.59.197.174	10.59.197.175
183	10.59.197.176/29	10.59.197.177 – 10.59.197.182	10.59.197.183
184	10.59.197.184/29	10.59.197.185 – 10.59.197.190	10.59.197.191
185	10.59.197.192/29	10.59.197.193 – 10.59.197.198	10.59.197.199
186	10.59.197.200/29	10.59.197.201 – 10.59.197.206	10.59.197.207
187	10.59.197.208/29	10.59.197.209 – 10.59.197.214	10.59.197.215
188	10.59.197.216/29	10.59.197.217 – 10.59.197.222	10.59.197.223
189	10.59.197.224/29	10.59.197.225 – 10.59.197.230	10.59.197.231
190	10.59.197.232/29	10.59.197.233 – 10.59.197.238	10.59.197.239
191	10.59.197.240/29	10.59.197.241 – 10.59.197.246	10.59.197.247
192	10.59.197.248/29	10.59.197.249 – 10.59.197.254	10.59.197.255
193	10.59.198.0/29	10.59.198.1 – 10.59.198.6	10.59.198.7
194	10.59.198.8/29	10.59.198.9 – 10.59.198.14	10.59.198.15
195	10.59.198.16/29	10.59.198.17 – 10.59.198.22	10.59.198.23
196	10.59.198.24/29	10.59.198.25 – 10.59.198.30	10.59.198.31
197	10.59.198.32/29	10.59.198.33 – 10.59.198.38	10.59.198.39
198	10.59.198.40/29	10.59.198.41 – 10.59.198.46	10.59.198.47
199	10.59.198.48/29	10.59.198.49 – 10.59.198.54	10.59.198.55
200	10.59.198.56/29	10.59.198.57 – 10.59.198.62	10.59.198.63
201	10.59.198.64/29	10.59.198.65 – 10.59.198.70	10.59.198.71
202	10.59.198.72/29	10.59.198.73 – 10.59.198.78	10.59.198.79
203	10.59.198.80/29	10.59.198.81 – 10.59.198.86	10.59.198.87
204	10.59.198.88/29	10.59.198.89 – 10.59.198.94	10.59.198.95
205	10.59.198.96/29	10.59.198.97 – 10.59.198.102	10.59.198.103
206	10.59.198.104/29	10.59.198.105 – 10.59.198.110	10.59.198.111
207	10.59.198.112/29	10.59.198.113 – 10.59.198.118	10.59.198.119
208	10.59.198.120/29	10.59.198.121 – 10.59.198.126	10.59.198.127
209	10.59.198.128/29	10.59.198.129 – 10.59.198.134	10.59.198.135
210	10.59.198.136/29	10.59.198.137 – 10.59.198.142	10.59.198.143
211	10.59.198.144/29	10.59.198.145 – 10.59.198.150	10.59.198.151
212	10.59.198.152/29	10.59.198.153 – 10.59.198.158	10.59.198.159
213	10.59.198.160/29	10.59.198.161 – 10.59.198.166	10.59.198.167
214	10.59.198.168/29	10.59.198.169 – 10.59.198.174	10.59.198.175
215	10.59.198.176/29	10.59.198.177 – 10.59.198.182	10.59.198.183
216	10.59.198.184/29	10.59.198.185 – 10.59.198.190	10.59.198.191
217	10.59.198.192/29	10.59.198.193 – 10.59.198.198	10.59.198.199
218	10.59.198.200/29	10.59.198.201 – 10.59.198.206	10.59.198.207
219	10.59.198.208/29	10.59.198.209 – 10.59.198.214	10.59.198.215
220	10.59.198.216/29	10.59.198.217 – 10.59.198.222	10.59.198.223
221	10.59.198.224/29	10.59.198.225 – 10.59.198.230	10.59.198.231
222	10.59.198.232/29	10.59.198.233 – 10.59.198.238	10.59.198.239
223	10.59.198.240/29	10.59.198.241 – 10.59.198.246	10.59.198.247
224	10.59.198.248/29	10.59.198.249 – 10.59.198.254	10.59.198.255
225	10.59.199.0/29	10.59.199.1 – 10.59.199.6	10.59.199.7
226	10.59.199.8/29	10.59.199.9 – 10.59.199.14	10.59.199.15
227	10.59.199.16/29	10.59.199.17 – 10.59.199.22	10.59.199.23
228	10.59.199.24/29	10.59.199.25 – 10.59.199.30	10.59.199.31
229	10.59.199.32/29	10.59.199.33 – 10.59.199.38	10.59.199.39
230	10.59.199.40/29	10.59.199.41 – 10.59.199.46	10.59.199.47
231	10.59.199.48/29	10.59.199.49 – 10.59.199.54	10.59.199.55
232	10.59.199.56/29	10.59.199.57 – 10.59.199.62	10.59.199.63
233	10.59.199.64/29	10.59.199.65 – 10.59.199.70	10.59.199.71
234	10.59.199.72/29	10.59.199.73 – 10.59.199.78	10.59.199.79
235	10.59.199.80/29	10.59.199.81 – 10.59.199.86	10.59.199.87
236	10.59.199.88/29	10.59.199.89 – 10.59.199.94	10.59.199.95
237	10.59.199.96/29	10.59.199.97 – 10.59.199.102	10.59.199.103
238	10.59.199.104/29	10.59.199.105 – 10.59.199.110	10.59.199.111
239	10.59.199.112/29	10.59.199.113 – 10.59.199.118	10.59.199.119
240	10.59.199.120/29	10.59.199.121 – 10.59.199.126	10.59.199.127
241	10.59.199.128/29	10.59.199.129 – 10.59.199.134	10.59.199.135
242	10.59.199.136/29	10.59.199.137 – 10.59.199.142	10.59.199.143
243	10.59.199.144/29	10.59.199.145 – 10.59.199.150	10.59.199.151
244	10.59.199.152/29	10.59.199.153 – 10.59.199.158	10.59.199.159
245	10.59.199.160/29	10.59.199.161 – 10.59.199.166	10.59.199.167
246	10.59.199.168/29	10.59.199.169 – 10.59.199.174	10.59.199.175
247	10.59.199.176/29	10.59.199.177 – 10.59.199.182	10.59.199.183
248	10.59.199.184/29	10.59.199.185 – 10.59.199.190	10.59.199.191
249	10.59.199.192/29	10.59.199.193 – 10.59.199.198	10.59.199.199
250	10.59.199.200/29	10.59.199.201 – 10.59.199.206	10.59.199.207
251	10.59.199.208/29	10.59.199.209 – 10.59.199.214	10.59.199.215
252	10.59.199.216/29	10.59.199.217 – 10.59.199.222	10.59.199.223
253	10.59.199.224/29	10.59.199.225 – 10.59.199.230	10.59.199.231
254	10.59.199.232/29	10.59.199.233 – 10.59.199.238	10.59.199.239
255	10.59.199.240/29	10.59.199.241 – 10.59.199.246	10.59.199.247
256	10.59.199.248/29	10.59.199.249 – 10.59.199.254	10.59.199.255

showing 256 of 2,048

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 /18
/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	1
/19	255.255.224.0	8,192	8,190	2 split →
/20	255.255.240.0	4,096	4,094	4 split →
/21	255.255.248.0	2,048	2,046	8 split →
/22	255.255.252.0	1,024	1,022	16 split →
/23	255.255.254.0	512	510	32 split →
/24	255.255.255.0	256	254	64 split →
/25	255.255.255.128	128	126	128 split →
/26	255.255.255.192	64	62	256 split →
/27	255.255.255.224	32	30	512 split →
/28	255.255.255.240	16	14	1,024 split →
/29	255.255.255.248	8	6	2,048 split →
/30	255.255.255.252	4	2	4,096 split →
/31	255.255.255.254	2	2	8,192 split →
/32	255.255.255.255	1	1	16,384 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 →