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)10.167.165.128/26

network10.167.165.128/26

broadcast10.167.165.191

first host10.167.165.129

last host10.167.165.190

subnet mask255.255.255.192

wildcard0.0.0.63

addresses64

usable hosts62

classA

ipcalc 10.167.165.128/26

address00001010.10100111.10100101.10000000

subnet mask11111111.11111111.11111111.11000000

network00001010.10100111.10100101.10000000

broadcast00001010.10100111.10100101.10111111

green = network part, grey = host part

hex0x0aa7a580

decimal178759040

reverse dns128.165.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:a580

/26 split into /32 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.165.128/32	10.167.165.128 – 10.167.165.128	10.167.165.128
2	10.167.165.129/32	10.167.165.129 – 10.167.165.129	10.167.165.129
3	10.167.165.130/32	10.167.165.130 – 10.167.165.130	10.167.165.130
4	10.167.165.131/32	10.167.165.131 – 10.167.165.131	10.167.165.131
5	10.167.165.132/32	10.167.165.132 – 10.167.165.132	10.167.165.132
6	10.167.165.133/32	10.167.165.133 – 10.167.165.133	10.167.165.133
7	10.167.165.134/32	10.167.165.134 – 10.167.165.134	10.167.165.134
8	10.167.165.135/32	10.167.165.135 – 10.167.165.135	10.167.165.135
9	10.167.165.136/32	10.167.165.136 – 10.167.165.136	10.167.165.136
10	10.167.165.137/32	10.167.165.137 – 10.167.165.137	10.167.165.137
11	10.167.165.138/32	10.167.165.138 – 10.167.165.138	10.167.165.138
12	10.167.165.139/32	10.167.165.139 – 10.167.165.139	10.167.165.139
13	10.167.165.140/32	10.167.165.140 – 10.167.165.140	10.167.165.140
14	10.167.165.141/32	10.167.165.141 – 10.167.165.141	10.167.165.141
15	10.167.165.142/32	10.167.165.142 – 10.167.165.142	10.167.165.142
16	10.167.165.143/32	10.167.165.143 – 10.167.165.143	10.167.165.143
17	10.167.165.144/32	10.167.165.144 – 10.167.165.144	10.167.165.144
18	10.167.165.145/32	10.167.165.145 – 10.167.165.145	10.167.165.145
19	10.167.165.146/32	10.167.165.146 – 10.167.165.146	10.167.165.146
20	10.167.165.147/32	10.167.165.147 – 10.167.165.147	10.167.165.147
21	10.167.165.148/32	10.167.165.148 – 10.167.165.148	10.167.165.148
22	10.167.165.149/32	10.167.165.149 – 10.167.165.149	10.167.165.149
23	10.167.165.150/32	10.167.165.150 – 10.167.165.150	10.167.165.150
24	10.167.165.151/32	10.167.165.151 – 10.167.165.151	10.167.165.151
25	10.167.165.152/32	10.167.165.152 – 10.167.165.152	10.167.165.152
26	10.167.165.153/32	10.167.165.153 – 10.167.165.153	10.167.165.153
27	10.167.165.154/32	10.167.165.154 – 10.167.165.154	10.167.165.154
28	10.167.165.155/32	10.167.165.155 – 10.167.165.155	10.167.165.155
29	10.167.165.156/32	10.167.165.156 – 10.167.165.156	10.167.165.156
30	10.167.165.157/32	10.167.165.157 – 10.167.165.157	10.167.165.157
31	10.167.165.158/32	10.167.165.158 – 10.167.165.158	10.167.165.158
32	10.167.165.159/32	10.167.165.159 – 10.167.165.159	10.167.165.159
33	10.167.165.160/32	10.167.165.160 – 10.167.165.160	10.167.165.160
34	10.167.165.161/32	10.167.165.161 – 10.167.165.161	10.167.165.161
35	10.167.165.162/32	10.167.165.162 – 10.167.165.162	10.167.165.162
36	10.167.165.163/32	10.167.165.163 – 10.167.165.163	10.167.165.163
37	10.167.165.164/32	10.167.165.164 – 10.167.165.164	10.167.165.164
38	10.167.165.165/32	10.167.165.165 – 10.167.165.165	10.167.165.165
39	10.167.165.166/32	10.167.165.166 – 10.167.165.166	10.167.165.166
40	10.167.165.167/32	10.167.165.167 – 10.167.165.167	10.167.165.167
41	10.167.165.168/32	10.167.165.168 – 10.167.165.168	10.167.165.168
42	10.167.165.169/32	10.167.165.169 – 10.167.165.169	10.167.165.169
43	10.167.165.170/32	10.167.165.170 – 10.167.165.170	10.167.165.170
44	10.167.165.171/32	10.167.165.171 – 10.167.165.171	10.167.165.171
45	10.167.165.172/32	10.167.165.172 – 10.167.165.172	10.167.165.172
46	10.167.165.173/32	10.167.165.173 – 10.167.165.173	10.167.165.173
47	10.167.165.174/32	10.167.165.174 – 10.167.165.174	10.167.165.174
48	10.167.165.175/32	10.167.165.175 – 10.167.165.175	10.167.165.175
49	10.167.165.176/32	10.167.165.176 – 10.167.165.176	10.167.165.176
50	10.167.165.177/32	10.167.165.177 – 10.167.165.177	10.167.165.177
51	10.167.165.178/32	10.167.165.178 – 10.167.165.178	10.167.165.178
52	10.167.165.179/32	10.167.165.179 – 10.167.165.179	10.167.165.179
53	10.167.165.180/32	10.167.165.180 – 10.167.165.180	10.167.165.180
54	10.167.165.181/32	10.167.165.181 – 10.167.165.181	10.167.165.181
55	10.167.165.182/32	10.167.165.182 – 10.167.165.182	10.167.165.182
56	10.167.165.183/32	10.167.165.183 – 10.167.165.183	10.167.165.183
57	10.167.165.184/32	10.167.165.184 – 10.167.165.184	10.167.165.184
58	10.167.165.185/32	10.167.165.185 – 10.167.165.185	10.167.165.185
59	10.167.165.186/32	10.167.165.186 – 10.167.165.186	10.167.165.186
60	10.167.165.187/32	10.167.165.187 – 10.167.165.187	10.167.165.187
61	10.167.165.188/32	10.167.165.188 – 10.167.165.188	10.167.165.188
62	10.167.165.189/32	10.167.165.189 – 10.167.165.189	10.167.165.189
63	10.167.165.190/32	10.167.165.190 – 10.167.165.190	10.167.165.190
64	10.167.165.191/32	10.167.165.191 – 10.167.165.191	10.167.165.191

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