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)10.2.150.0/26

network10.2.150.0/26

broadcast10.2.150.63

first host10.2.150.1

last host10.2.150.62

subnet mask255.255.255.192

wildcard0.0.0.63

addresses64

usable hosts62

classA

ipcalc 10.2.150.0/26

address00001010.00000010.10010110.00000000

subnet mask11111111.11111111.11111111.11000000

network00001010.00000010.10010110.00000000

broadcast00001010.00000010.10010110.00111111

green = network part, grey = host part

hex0x0a029600

decimal167941632

reverse dns0.150.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9600

/26 split into /31 · 32 subnets

close ×

#	network	host range	broadcast
1	10.2.150.0/31	10.2.150.0 – 10.2.150.1	10.2.150.1
2	10.2.150.2/31	10.2.150.2 – 10.2.150.3	10.2.150.3
3	10.2.150.4/31	10.2.150.4 – 10.2.150.5	10.2.150.5
4	10.2.150.6/31	10.2.150.6 – 10.2.150.7	10.2.150.7
5	10.2.150.8/31	10.2.150.8 – 10.2.150.9	10.2.150.9
6	10.2.150.10/31	10.2.150.10 – 10.2.150.11	10.2.150.11
7	10.2.150.12/31	10.2.150.12 – 10.2.150.13	10.2.150.13
8	10.2.150.14/31	10.2.150.14 – 10.2.150.15	10.2.150.15
9	10.2.150.16/31	10.2.150.16 – 10.2.150.17	10.2.150.17
10	10.2.150.18/31	10.2.150.18 – 10.2.150.19	10.2.150.19
11	10.2.150.20/31	10.2.150.20 – 10.2.150.21	10.2.150.21
12	10.2.150.22/31	10.2.150.22 – 10.2.150.23	10.2.150.23
13	10.2.150.24/31	10.2.150.24 – 10.2.150.25	10.2.150.25
14	10.2.150.26/31	10.2.150.26 – 10.2.150.27	10.2.150.27
15	10.2.150.28/31	10.2.150.28 – 10.2.150.29	10.2.150.29
16	10.2.150.30/31	10.2.150.30 – 10.2.150.31	10.2.150.31
17	10.2.150.32/31	10.2.150.32 – 10.2.150.33	10.2.150.33
18	10.2.150.34/31	10.2.150.34 – 10.2.150.35	10.2.150.35
19	10.2.150.36/31	10.2.150.36 – 10.2.150.37	10.2.150.37
20	10.2.150.38/31	10.2.150.38 – 10.2.150.39	10.2.150.39
21	10.2.150.40/31	10.2.150.40 – 10.2.150.41	10.2.150.41
22	10.2.150.42/31	10.2.150.42 – 10.2.150.43	10.2.150.43
23	10.2.150.44/31	10.2.150.44 – 10.2.150.45	10.2.150.45
24	10.2.150.46/31	10.2.150.46 – 10.2.150.47	10.2.150.47
25	10.2.150.48/31	10.2.150.48 – 10.2.150.49	10.2.150.49
26	10.2.150.50/31	10.2.150.50 – 10.2.150.51	10.2.150.51
27	10.2.150.52/31	10.2.150.52 – 10.2.150.53	10.2.150.53
28	10.2.150.54/31	10.2.150.54 – 10.2.150.55	10.2.150.55
29	10.2.150.56/31	10.2.150.56 – 10.2.150.57	10.2.150.57
30	10.2.150.58/31	10.2.150.58 – 10.2.150.59	10.2.150.59
31	10.2.150.60/31	10.2.150.60 – 10.2.150.61	10.2.150.61
32	10.2.150.62/31	10.2.150.62 – 10.2.150.63	10.2.150.63

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 →