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)10.63.28.0/22

network10.63.28.0/22

broadcast10.63.31.255

first host10.63.28.1

last host10.63.31.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.63.28.0/22

address00001010.00111111.00011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00111111.00011100.00000000

broadcast00001010.00111111.00011111.11111111

green = network part, grey = host part

hex0x0a3f1c00

decimal171908096

reverse dns0.28.63.10.in-addr.arpa

ipv4-mapped::ffff:a3f:1c00

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.63.28.0/28	10.63.28.1 – 10.63.28.14	10.63.28.15
2	10.63.28.16/28	10.63.28.17 – 10.63.28.30	10.63.28.31
3	10.63.28.32/28	10.63.28.33 – 10.63.28.46	10.63.28.47
4	10.63.28.48/28	10.63.28.49 – 10.63.28.62	10.63.28.63
5	10.63.28.64/28	10.63.28.65 – 10.63.28.78	10.63.28.79
6	10.63.28.80/28	10.63.28.81 – 10.63.28.94	10.63.28.95
7	10.63.28.96/28	10.63.28.97 – 10.63.28.110	10.63.28.111
8	10.63.28.112/28	10.63.28.113 – 10.63.28.126	10.63.28.127
9	10.63.28.128/28	10.63.28.129 – 10.63.28.142	10.63.28.143
10	10.63.28.144/28	10.63.28.145 – 10.63.28.158	10.63.28.159
11	10.63.28.160/28	10.63.28.161 – 10.63.28.174	10.63.28.175
12	10.63.28.176/28	10.63.28.177 – 10.63.28.190	10.63.28.191
13	10.63.28.192/28	10.63.28.193 – 10.63.28.206	10.63.28.207
14	10.63.28.208/28	10.63.28.209 – 10.63.28.222	10.63.28.223
15	10.63.28.224/28	10.63.28.225 – 10.63.28.238	10.63.28.239
16	10.63.28.240/28	10.63.28.241 – 10.63.28.254	10.63.28.255
17	10.63.29.0/28	10.63.29.1 – 10.63.29.14	10.63.29.15
18	10.63.29.16/28	10.63.29.17 – 10.63.29.30	10.63.29.31
19	10.63.29.32/28	10.63.29.33 – 10.63.29.46	10.63.29.47
20	10.63.29.48/28	10.63.29.49 – 10.63.29.62	10.63.29.63
21	10.63.29.64/28	10.63.29.65 – 10.63.29.78	10.63.29.79
22	10.63.29.80/28	10.63.29.81 – 10.63.29.94	10.63.29.95
23	10.63.29.96/28	10.63.29.97 – 10.63.29.110	10.63.29.111
24	10.63.29.112/28	10.63.29.113 – 10.63.29.126	10.63.29.127
25	10.63.29.128/28	10.63.29.129 – 10.63.29.142	10.63.29.143
26	10.63.29.144/28	10.63.29.145 – 10.63.29.158	10.63.29.159
27	10.63.29.160/28	10.63.29.161 – 10.63.29.174	10.63.29.175
28	10.63.29.176/28	10.63.29.177 – 10.63.29.190	10.63.29.191
29	10.63.29.192/28	10.63.29.193 – 10.63.29.206	10.63.29.207
30	10.63.29.208/28	10.63.29.209 – 10.63.29.222	10.63.29.223
31	10.63.29.224/28	10.63.29.225 – 10.63.29.238	10.63.29.239
32	10.63.29.240/28	10.63.29.241 – 10.63.29.254	10.63.29.255
33	10.63.30.0/28	10.63.30.1 – 10.63.30.14	10.63.30.15
34	10.63.30.16/28	10.63.30.17 – 10.63.30.30	10.63.30.31
35	10.63.30.32/28	10.63.30.33 – 10.63.30.46	10.63.30.47
36	10.63.30.48/28	10.63.30.49 – 10.63.30.62	10.63.30.63
37	10.63.30.64/28	10.63.30.65 – 10.63.30.78	10.63.30.79
38	10.63.30.80/28	10.63.30.81 – 10.63.30.94	10.63.30.95
39	10.63.30.96/28	10.63.30.97 – 10.63.30.110	10.63.30.111
40	10.63.30.112/28	10.63.30.113 – 10.63.30.126	10.63.30.127
41	10.63.30.128/28	10.63.30.129 – 10.63.30.142	10.63.30.143
42	10.63.30.144/28	10.63.30.145 – 10.63.30.158	10.63.30.159
43	10.63.30.160/28	10.63.30.161 – 10.63.30.174	10.63.30.175
44	10.63.30.176/28	10.63.30.177 – 10.63.30.190	10.63.30.191
45	10.63.30.192/28	10.63.30.193 – 10.63.30.206	10.63.30.207
46	10.63.30.208/28	10.63.30.209 – 10.63.30.222	10.63.30.223
47	10.63.30.224/28	10.63.30.225 – 10.63.30.238	10.63.30.239
48	10.63.30.240/28	10.63.30.241 – 10.63.30.254	10.63.30.255
49	10.63.31.0/28	10.63.31.1 – 10.63.31.14	10.63.31.15
50	10.63.31.16/28	10.63.31.17 – 10.63.31.30	10.63.31.31
51	10.63.31.32/28	10.63.31.33 – 10.63.31.46	10.63.31.47
52	10.63.31.48/28	10.63.31.49 – 10.63.31.62	10.63.31.63
53	10.63.31.64/28	10.63.31.65 – 10.63.31.78	10.63.31.79
54	10.63.31.80/28	10.63.31.81 – 10.63.31.94	10.63.31.95
55	10.63.31.96/28	10.63.31.97 – 10.63.31.110	10.63.31.111
56	10.63.31.112/28	10.63.31.113 – 10.63.31.126	10.63.31.127
57	10.63.31.128/28	10.63.31.129 – 10.63.31.142	10.63.31.143
58	10.63.31.144/28	10.63.31.145 – 10.63.31.158	10.63.31.159
59	10.63.31.160/28	10.63.31.161 – 10.63.31.174	10.63.31.175
60	10.63.31.176/28	10.63.31.177 – 10.63.31.190	10.63.31.191
61	10.63.31.192/28	10.63.31.193 – 10.63.31.206	10.63.31.207
62	10.63.31.208/28	10.63.31.209 – 10.63.31.222	10.63.31.223
63	10.63.31.224/28	10.63.31.225 – 10.63.31.238	10.63.31.239
64	10.63.31.240/28	10.63.31.241 – 10.63.31.254	10.63.31.255

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 →