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)10.151.96.0/22

network10.151.96.0/22

broadcast10.151.99.255

first host10.151.96.1

last host10.151.99.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.96.0/22

address00001010.10010111.01100000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.01100000.00000000

broadcast00001010.10010111.01100011.11111111

green = network part, grey = host part

hex0x0a976000

decimal177692672

reverse dns0.96.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:6000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.151.96.0/28	10.151.96.1 – 10.151.96.14	10.151.96.15
2	10.151.96.16/28	10.151.96.17 – 10.151.96.30	10.151.96.31
3	10.151.96.32/28	10.151.96.33 – 10.151.96.46	10.151.96.47
4	10.151.96.48/28	10.151.96.49 – 10.151.96.62	10.151.96.63
5	10.151.96.64/28	10.151.96.65 – 10.151.96.78	10.151.96.79
6	10.151.96.80/28	10.151.96.81 – 10.151.96.94	10.151.96.95
7	10.151.96.96/28	10.151.96.97 – 10.151.96.110	10.151.96.111
8	10.151.96.112/28	10.151.96.113 – 10.151.96.126	10.151.96.127
9	10.151.96.128/28	10.151.96.129 – 10.151.96.142	10.151.96.143
10	10.151.96.144/28	10.151.96.145 – 10.151.96.158	10.151.96.159
11	10.151.96.160/28	10.151.96.161 – 10.151.96.174	10.151.96.175
12	10.151.96.176/28	10.151.96.177 – 10.151.96.190	10.151.96.191
13	10.151.96.192/28	10.151.96.193 – 10.151.96.206	10.151.96.207
14	10.151.96.208/28	10.151.96.209 – 10.151.96.222	10.151.96.223
15	10.151.96.224/28	10.151.96.225 – 10.151.96.238	10.151.96.239
16	10.151.96.240/28	10.151.96.241 – 10.151.96.254	10.151.96.255
17	10.151.97.0/28	10.151.97.1 – 10.151.97.14	10.151.97.15
18	10.151.97.16/28	10.151.97.17 – 10.151.97.30	10.151.97.31
19	10.151.97.32/28	10.151.97.33 – 10.151.97.46	10.151.97.47
20	10.151.97.48/28	10.151.97.49 – 10.151.97.62	10.151.97.63
21	10.151.97.64/28	10.151.97.65 – 10.151.97.78	10.151.97.79
22	10.151.97.80/28	10.151.97.81 – 10.151.97.94	10.151.97.95
23	10.151.97.96/28	10.151.97.97 – 10.151.97.110	10.151.97.111
24	10.151.97.112/28	10.151.97.113 – 10.151.97.126	10.151.97.127
25	10.151.97.128/28	10.151.97.129 – 10.151.97.142	10.151.97.143
26	10.151.97.144/28	10.151.97.145 – 10.151.97.158	10.151.97.159
27	10.151.97.160/28	10.151.97.161 – 10.151.97.174	10.151.97.175
28	10.151.97.176/28	10.151.97.177 – 10.151.97.190	10.151.97.191
29	10.151.97.192/28	10.151.97.193 – 10.151.97.206	10.151.97.207
30	10.151.97.208/28	10.151.97.209 – 10.151.97.222	10.151.97.223
31	10.151.97.224/28	10.151.97.225 – 10.151.97.238	10.151.97.239
32	10.151.97.240/28	10.151.97.241 – 10.151.97.254	10.151.97.255
33	10.151.98.0/28	10.151.98.1 – 10.151.98.14	10.151.98.15
34	10.151.98.16/28	10.151.98.17 – 10.151.98.30	10.151.98.31
35	10.151.98.32/28	10.151.98.33 – 10.151.98.46	10.151.98.47
36	10.151.98.48/28	10.151.98.49 – 10.151.98.62	10.151.98.63
37	10.151.98.64/28	10.151.98.65 – 10.151.98.78	10.151.98.79
38	10.151.98.80/28	10.151.98.81 – 10.151.98.94	10.151.98.95
39	10.151.98.96/28	10.151.98.97 – 10.151.98.110	10.151.98.111
40	10.151.98.112/28	10.151.98.113 – 10.151.98.126	10.151.98.127
41	10.151.98.128/28	10.151.98.129 – 10.151.98.142	10.151.98.143
42	10.151.98.144/28	10.151.98.145 – 10.151.98.158	10.151.98.159
43	10.151.98.160/28	10.151.98.161 – 10.151.98.174	10.151.98.175
44	10.151.98.176/28	10.151.98.177 – 10.151.98.190	10.151.98.191
45	10.151.98.192/28	10.151.98.193 – 10.151.98.206	10.151.98.207
46	10.151.98.208/28	10.151.98.209 – 10.151.98.222	10.151.98.223
47	10.151.98.224/28	10.151.98.225 – 10.151.98.238	10.151.98.239
48	10.151.98.240/28	10.151.98.241 – 10.151.98.254	10.151.98.255
49	10.151.99.0/28	10.151.99.1 – 10.151.99.14	10.151.99.15
50	10.151.99.16/28	10.151.99.17 – 10.151.99.30	10.151.99.31
51	10.151.99.32/28	10.151.99.33 – 10.151.99.46	10.151.99.47
52	10.151.99.48/28	10.151.99.49 – 10.151.99.62	10.151.99.63
53	10.151.99.64/28	10.151.99.65 – 10.151.99.78	10.151.99.79
54	10.151.99.80/28	10.151.99.81 – 10.151.99.94	10.151.99.95
55	10.151.99.96/28	10.151.99.97 – 10.151.99.110	10.151.99.111
56	10.151.99.112/28	10.151.99.113 – 10.151.99.126	10.151.99.127
57	10.151.99.128/28	10.151.99.129 – 10.151.99.142	10.151.99.143
58	10.151.99.144/28	10.151.99.145 – 10.151.99.158	10.151.99.159
59	10.151.99.160/28	10.151.99.161 – 10.151.99.174	10.151.99.175
60	10.151.99.176/28	10.151.99.177 – 10.151.99.190	10.151.99.191
61	10.151.99.192/28	10.151.99.193 – 10.151.99.206	10.151.99.207
62	10.151.99.208/28	10.151.99.209 – 10.151.99.222	10.151.99.223
63	10.151.99.224/28	10.151.99.225 – 10.151.99.238	10.151.99.239
64	10.151.99.240/28	10.151.99.241 – 10.151.99.254	10.151.99.255

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