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)10.167.52.0/23

network10.167.52.0/23

broadcast10.167.53.255

first host10.167.52.1

last host10.167.53.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.52.0/23

address00001010.10100111.00110100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.00110100.00000000

broadcast00001010.10100111.00110101.11111111

green = network part, grey = host part

hex0x0aa73400

decimal178729984

reverse dns0.52.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3400

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.52.0/29	10.167.52.1 – 10.167.52.6	10.167.52.7
2	10.167.52.8/29	10.167.52.9 – 10.167.52.14	10.167.52.15
3	10.167.52.16/29	10.167.52.17 – 10.167.52.22	10.167.52.23
4	10.167.52.24/29	10.167.52.25 – 10.167.52.30	10.167.52.31
5	10.167.52.32/29	10.167.52.33 – 10.167.52.38	10.167.52.39
6	10.167.52.40/29	10.167.52.41 – 10.167.52.46	10.167.52.47
7	10.167.52.48/29	10.167.52.49 – 10.167.52.54	10.167.52.55
8	10.167.52.56/29	10.167.52.57 – 10.167.52.62	10.167.52.63
9	10.167.52.64/29	10.167.52.65 – 10.167.52.70	10.167.52.71
10	10.167.52.72/29	10.167.52.73 – 10.167.52.78	10.167.52.79
11	10.167.52.80/29	10.167.52.81 – 10.167.52.86	10.167.52.87
12	10.167.52.88/29	10.167.52.89 – 10.167.52.94	10.167.52.95
13	10.167.52.96/29	10.167.52.97 – 10.167.52.102	10.167.52.103
14	10.167.52.104/29	10.167.52.105 – 10.167.52.110	10.167.52.111
15	10.167.52.112/29	10.167.52.113 – 10.167.52.118	10.167.52.119
16	10.167.52.120/29	10.167.52.121 – 10.167.52.126	10.167.52.127
17	10.167.52.128/29	10.167.52.129 – 10.167.52.134	10.167.52.135
18	10.167.52.136/29	10.167.52.137 – 10.167.52.142	10.167.52.143
19	10.167.52.144/29	10.167.52.145 – 10.167.52.150	10.167.52.151
20	10.167.52.152/29	10.167.52.153 – 10.167.52.158	10.167.52.159
21	10.167.52.160/29	10.167.52.161 – 10.167.52.166	10.167.52.167
22	10.167.52.168/29	10.167.52.169 – 10.167.52.174	10.167.52.175
23	10.167.52.176/29	10.167.52.177 – 10.167.52.182	10.167.52.183
24	10.167.52.184/29	10.167.52.185 – 10.167.52.190	10.167.52.191
25	10.167.52.192/29	10.167.52.193 – 10.167.52.198	10.167.52.199
26	10.167.52.200/29	10.167.52.201 – 10.167.52.206	10.167.52.207
27	10.167.52.208/29	10.167.52.209 – 10.167.52.214	10.167.52.215
28	10.167.52.216/29	10.167.52.217 – 10.167.52.222	10.167.52.223
29	10.167.52.224/29	10.167.52.225 – 10.167.52.230	10.167.52.231
30	10.167.52.232/29	10.167.52.233 – 10.167.52.238	10.167.52.239
31	10.167.52.240/29	10.167.52.241 – 10.167.52.246	10.167.52.247
32	10.167.52.248/29	10.167.52.249 – 10.167.52.254	10.167.52.255
33	10.167.53.0/29	10.167.53.1 – 10.167.53.6	10.167.53.7
34	10.167.53.8/29	10.167.53.9 – 10.167.53.14	10.167.53.15
35	10.167.53.16/29	10.167.53.17 – 10.167.53.22	10.167.53.23
36	10.167.53.24/29	10.167.53.25 – 10.167.53.30	10.167.53.31
37	10.167.53.32/29	10.167.53.33 – 10.167.53.38	10.167.53.39
38	10.167.53.40/29	10.167.53.41 – 10.167.53.46	10.167.53.47
39	10.167.53.48/29	10.167.53.49 – 10.167.53.54	10.167.53.55
40	10.167.53.56/29	10.167.53.57 – 10.167.53.62	10.167.53.63
41	10.167.53.64/29	10.167.53.65 – 10.167.53.70	10.167.53.71
42	10.167.53.72/29	10.167.53.73 – 10.167.53.78	10.167.53.79
43	10.167.53.80/29	10.167.53.81 – 10.167.53.86	10.167.53.87
44	10.167.53.88/29	10.167.53.89 – 10.167.53.94	10.167.53.95
45	10.167.53.96/29	10.167.53.97 – 10.167.53.102	10.167.53.103
46	10.167.53.104/29	10.167.53.105 – 10.167.53.110	10.167.53.111
47	10.167.53.112/29	10.167.53.113 – 10.167.53.118	10.167.53.119
48	10.167.53.120/29	10.167.53.121 – 10.167.53.126	10.167.53.127
49	10.167.53.128/29	10.167.53.129 – 10.167.53.134	10.167.53.135
50	10.167.53.136/29	10.167.53.137 – 10.167.53.142	10.167.53.143
51	10.167.53.144/29	10.167.53.145 – 10.167.53.150	10.167.53.151
52	10.167.53.152/29	10.167.53.153 – 10.167.53.158	10.167.53.159
53	10.167.53.160/29	10.167.53.161 – 10.167.53.166	10.167.53.167
54	10.167.53.168/29	10.167.53.169 – 10.167.53.174	10.167.53.175
55	10.167.53.176/29	10.167.53.177 – 10.167.53.182	10.167.53.183
56	10.167.53.184/29	10.167.53.185 – 10.167.53.190	10.167.53.191
57	10.167.53.192/29	10.167.53.193 – 10.167.53.198	10.167.53.199
58	10.167.53.200/29	10.167.53.201 – 10.167.53.206	10.167.53.207
59	10.167.53.208/29	10.167.53.209 – 10.167.53.214	10.167.53.215
60	10.167.53.216/29	10.167.53.217 – 10.167.53.222	10.167.53.223
61	10.167.53.224/29	10.167.53.225 – 10.167.53.230	10.167.53.231
62	10.167.53.232/29	10.167.53.233 – 10.167.53.238	10.167.53.239
63	10.167.53.240/29	10.167.53.241 – 10.167.53.246	10.167.53.247
64	10.167.53.248/29	10.167.53.249 – 10.167.53.254	10.167.53.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →