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)10.167.150.0/23

network10.167.150.0/23

broadcast10.167.151.255

first host10.167.150.1

last host10.167.151.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.150.0/23

address00001010.10100111.10010110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.10010110.00000000

broadcast00001010.10100111.10010111.11111111

green = network part, grey = host part

hex0x0aa79600

decimal178755072

reverse dns0.150.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:9600

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.150.0/29	10.167.150.1 – 10.167.150.6	10.167.150.7
2	10.167.150.8/29	10.167.150.9 – 10.167.150.14	10.167.150.15
3	10.167.150.16/29	10.167.150.17 – 10.167.150.22	10.167.150.23
4	10.167.150.24/29	10.167.150.25 – 10.167.150.30	10.167.150.31
5	10.167.150.32/29	10.167.150.33 – 10.167.150.38	10.167.150.39
6	10.167.150.40/29	10.167.150.41 – 10.167.150.46	10.167.150.47
7	10.167.150.48/29	10.167.150.49 – 10.167.150.54	10.167.150.55
8	10.167.150.56/29	10.167.150.57 – 10.167.150.62	10.167.150.63
9	10.167.150.64/29	10.167.150.65 – 10.167.150.70	10.167.150.71
10	10.167.150.72/29	10.167.150.73 – 10.167.150.78	10.167.150.79
11	10.167.150.80/29	10.167.150.81 – 10.167.150.86	10.167.150.87
12	10.167.150.88/29	10.167.150.89 – 10.167.150.94	10.167.150.95
13	10.167.150.96/29	10.167.150.97 – 10.167.150.102	10.167.150.103
14	10.167.150.104/29	10.167.150.105 – 10.167.150.110	10.167.150.111
15	10.167.150.112/29	10.167.150.113 – 10.167.150.118	10.167.150.119
16	10.167.150.120/29	10.167.150.121 – 10.167.150.126	10.167.150.127
17	10.167.150.128/29	10.167.150.129 – 10.167.150.134	10.167.150.135
18	10.167.150.136/29	10.167.150.137 – 10.167.150.142	10.167.150.143
19	10.167.150.144/29	10.167.150.145 – 10.167.150.150	10.167.150.151
20	10.167.150.152/29	10.167.150.153 – 10.167.150.158	10.167.150.159
21	10.167.150.160/29	10.167.150.161 – 10.167.150.166	10.167.150.167
22	10.167.150.168/29	10.167.150.169 – 10.167.150.174	10.167.150.175
23	10.167.150.176/29	10.167.150.177 – 10.167.150.182	10.167.150.183
24	10.167.150.184/29	10.167.150.185 – 10.167.150.190	10.167.150.191
25	10.167.150.192/29	10.167.150.193 – 10.167.150.198	10.167.150.199
26	10.167.150.200/29	10.167.150.201 – 10.167.150.206	10.167.150.207
27	10.167.150.208/29	10.167.150.209 – 10.167.150.214	10.167.150.215
28	10.167.150.216/29	10.167.150.217 – 10.167.150.222	10.167.150.223
29	10.167.150.224/29	10.167.150.225 – 10.167.150.230	10.167.150.231
30	10.167.150.232/29	10.167.150.233 – 10.167.150.238	10.167.150.239
31	10.167.150.240/29	10.167.150.241 – 10.167.150.246	10.167.150.247
32	10.167.150.248/29	10.167.150.249 – 10.167.150.254	10.167.150.255
33	10.167.151.0/29	10.167.151.1 – 10.167.151.6	10.167.151.7
34	10.167.151.8/29	10.167.151.9 – 10.167.151.14	10.167.151.15
35	10.167.151.16/29	10.167.151.17 – 10.167.151.22	10.167.151.23
36	10.167.151.24/29	10.167.151.25 – 10.167.151.30	10.167.151.31
37	10.167.151.32/29	10.167.151.33 – 10.167.151.38	10.167.151.39
38	10.167.151.40/29	10.167.151.41 – 10.167.151.46	10.167.151.47
39	10.167.151.48/29	10.167.151.49 – 10.167.151.54	10.167.151.55
40	10.167.151.56/29	10.167.151.57 – 10.167.151.62	10.167.151.63
41	10.167.151.64/29	10.167.151.65 – 10.167.151.70	10.167.151.71
42	10.167.151.72/29	10.167.151.73 – 10.167.151.78	10.167.151.79
43	10.167.151.80/29	10.167.151.81 – 10.167.151.86	10.167.151.87
44	10.167.151.88/29	10.167.151.89 – 10.167.151.94	10.167.151.95
45	10.167.151.96/29	10.167.151.97 – 10.167.151.102	10.167.151.103
46	10.167.151.104/29	10.167.151.105 – 10.167.151.110	10.167.151.111
47	10.167.151.112/29	10.167.151.113 – 10.167.151.118	10.167.151.119
48	10.167.151.120/29	10.167.151.121 – 10.167.151.126	10.167.151.127
49	10.167.151.128/29	10.167.151.129 – 10.167.151.134	10.167.151.135
50	10.167.151.136/29	10.167.151.137 – 10.167.151.142	10.167.151.143
51	10.167.151.144/29	10.167.151.145 – 10.167.151.150	10.167.151.151
52	10.167.151.152/29	10.167.151.153 – 10.167.151.158	10.167.151.159
53	10.167.151.160/29	10.167.151.161 – 10.167.151.166	10.167.151.167
54	10.167.151.168/29	10.167.151.169 – 10.167.151.174	10.167.151.175
55	10.167.151.176/29	10.167.151.177 – 10.167.151.182	10.167.151.183
56	10.167.151.184/29	10.167.151.185 – 10.167.151.190	10.167.151.191
57	10.167.151.192/29	10.167.151.193 – 10.167.151.198	10.167.151.199
58	10.167.151.200/29	10.167.151.201 – 10.167.151.206	10.167.151.207
59	10.167.151.208/29	10.167.151.209 – 10.167.151.214	10.167.151.215
60	10.167.151.216/29	10.167.151.217 – 10.167.151.222	10.167.151.223
61	10.167.151.224/29	10.167.151.225 – 10.167.151.230	10.167.151.231
62	10.167.151.232/29	10.167.151.233 – 10.167.151.238	10.167.151.239
63	10.167.151.240/29	10.167.151.241 – 10.167.151.246	10.167.151.247
64	10.167.151.248/29	10.167.151.249 – 10.167.151.254	10.167.151.255

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 →