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)10.167.24.0/23

network10.167.24.0/23

broadcast10.167.25.255

first host10.167.24.1

last host10.167.25.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.24.0/23

address00001010.10100111.00011000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.00011000.00000000

broadcast00001010.10100111.00011001.11111111

green = network part, grey = host part

hex0x0aa71800

decimal178722816

reverse dns0.24.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:1800

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.24.0/29	10.167.24.1 – 10.167.24.6	10.167.24.7
2	10.167.24.8/29	10.167.24.9 – 10.167.24.14	10.167.24.15
3	10.167.24.16/29	10.167.24.17 – 10.167.24.22	10.167.24.23
4	10.167.24.24/29	10.167.24.25 – 10.167.24.30	10.167.24.31
5	10.167.24.32/29	10.167.24.33 – 10.167.24.38	10.167.24.39
6	10.167.24.40/29	10.167.24.41 – 10.167.24.46	10.167.24.47
7	10.167.24.48/29	10.167.24.49 – 10.167.24.54	10.167.24.55
8	10.167.24.56/29	10.167.24.57 – 10.167.24.62	10.167.24.63
9	10.167.24.64/29	10.167.24.65 – 10.167.24.70	10.167.24.71
10	10.167.24.72/29	10.167.24.73 – 10.167.24.78	10.167.24.79
11	10.167.24.80/29	10.167.24.81 – 10.167.24.86	10.167.24.87
12	10.167.24.88/29	10.167.24.89 – 10.167.24.94	10.167.24.95
13	10.167.24.96/29	10.167.24.97 – 10.167.24.102	10.167.24.103
14	10.167.24.104/29	10.167.24.105 – 10.167.24.110	10.167.24.111
15	10.167.24.112/29	10.167.24.113 – 10.167.24.118	10.167.24.119
16	10.167.24.120/29	10.167.24.121 – 10.167.24.126	10.167.24.127
17	10.167.24.128/29	10.167.24.129 – 10.167.24.134	10.167.24.135
18	10.167.24.136/29	10.167.24.137 – 10.167.24.142	10.167.24.143
19	10.167.24.144/29	10.167.24.145 – 10.167.24.150	10.167.24.151
20	10.167.24.152/29	10.167.24.153 – 10.167.24.158	10.167.24.159
21	10.167.24.160/29	10.167.24.161 – 10.167.24.166	10.167.24.167
22	10.167.24.168/29	10.167.24.169 – 10.167.24.174	10.167.24.175
23	10.167.24.176/29	10.167.24.177 – 10.167.24.182	10.167.24.183
24	10.167.24.184/29	10.167.24.185 – 10.167.24.190	10.167.24.191
25	10.167.24.192/29	10.167.24.193 – 10.167.24.198	10.167.24.199
26	10.167.24.200/29	10.167.24.201 – 10.167.24.206	10.167.24.207
27	10.167.24.208/29	10.167.24.209 – 10.167.24.214	10.167.24.215
28	10.167.24.216/29	10.167.24.217 – 10.167.24.222	10.167.24.223
29	10.167.24.224/29	10.167.24.225 – 10.167.24.230	10.167.24.231
30	10.167.24.232/29	10.167.24.233 – 10.167.24.238	10.167.24.239
31	10.167.24.240/29	10.167.24.241 – 10.167.24.246	10.167.24.247
32	10.167.24.248/29	10.167.24.249 – 10.167.24.254	10.167.24.255
33	10.167.25.0/29	10.167.25.1 – 10.167.25.6	10.167.25.7
34	10.167.25.8/29	10.167.25.9 – 10.167.25.14	10.167.25.15
35	10.167.25.16/29	10.167.25.17 – 10.167.25.22	10.167.25.23
36	10.167.25.24/29	10.167.25.25 – 10.167.25.30	10.167.25.31
37	10.167.25.32/29	10.167.25.33 – 10.167.25.38	10.167.25.39
38	10.167.25.40/29	10.167.25.41 – 10.167.25.46	10.167.25.47
39	10.167.25.48/29	10.167.25.49 – 10.167.25.54	10.167.25.55
40	10.167.25.56/29	10.167.25.57 – 10.167.25.62	10.167.25.63
41	10.167.25.64/29	10.167.25.65 – 10.167.25.70	10.167.25.71
42	10.167.25.72/29	10.167.25.73 – 10.167.25.78	10.167.25.79
43	10.167.25.80/29	10.167.25.81 – 10.167.25.86	10.167.25.87
44	10.167.25.88/29	10.167.25.89 – 10.167.25.94	10.167.25.95
45	10.167.25.96/29	10.167.25.97 – 10.167.25.102	10.167.25.103
46	10.167.25.104/29	10.167.25.105 – 10.167.25.110	10.167.25.111
47	10.167.25.112/29	10.167.25.113 – 10.167.25.118	10.167.25.119
48	10.167.25.120/29	10.167.25.121 – 10.167.25.126	10.167.25.127
49	10.167.25.128/29	10.167.25.129 – 10.167.25.134	10.167.25.135
50	10.167.25.136/29	10.167.25.137 – 10.167.25.142	10.167.25.143
51	10.167.25.144/29	10.167.25.145 – 10.167.25.150	10.167.25.151
52	10.167.25.152/29	10.167.25.153 – 10.167.25.158	10.167.25.159
53	10.167.25.160/29	10.167.25.161 – 10.167.25.166	10.167.25.167
54	10.167.25.168/29	10.167.25.169 – 10.167.25.174	10.167.25.175
55	10.167.25.176/29	10.167.25.177 – 10.167.25.182	10.167.25.183
56	10.167.25.184/29	10.167.25.185 – 10.167.25.190	10.167.25.191
57	10.167.25.192/29	10.167.25.193 – 10.167.25.198	10.167.25.199
58	10.167.25.200/29	10.167.25.201 – 10.167.25.206	10.167.25.207
59	10.167.25.208/29	10.167.25.209 – 10.167.25.214	10.167.25.215
60	10.167.25.216/29	10.167.25.217 – 10.167.25.222	10.167.25.223
61	10.167.25.224/29	10.167.25.225 – 10.167.25.230	10.167.25.231
62	10.167.25.232/29	10.167.25.233 – 10.167.25.238	10.167.25.239
63	10.167.25.240/29	10.167.25.241 – 10.167.25.246	10.167.25.247
64	10.167.25.248/29	10.167.25.249 – 10.167.25.254	10.167.25.255

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 →