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)10.5.93.64/28

network10.5.93.64/28

broadcast10.5.93.79

first host10.5.93.65

last host10.5.93.78

subnet mask255.255.255.240

wildcard0.0.0.15

addresses16

usable hosts14

classA

ipcalc 10.5.93.64/28

address00001010.00000101.01011101.01000000

subnet mask11111111.11111111.11111111.11110000

network00001010.00000101.01011101.01000000

broadcast00001010.00000101.01011101.01001111

green = network part, grey = host part

hex0x0a055d40

decimal168123712

reverse dns64.93.5.10.in-addr.arpa

ipv4-mapped::ffff:a05:5d40

/28 split into /32 · 16 subnets

close ×

#	network	host range	broadcast
1	10.5.93.64/32	10.5.93.64 – 10.5.93.64	10.5.93.64
2	10.5.93.65/32	10.5.93.65 – 10.5.93.65	10.5.93.65
3	10.5.93.66/32	10.5.93.66 – 10.5.93.66	10.5.93.66
4	10.5.93.67/32	10.5.93.67 – 10.5.93.67	10.5.93.67
5	10.5.93.68/32	10.5.93.68 – 10.5.93.68	10.5.93.68
6	10.5.93.69/32	10.5.93.69 – 10.5.93.69	10.5.93.69
7	10.5.93.70/32	10.5.93.70 – 10.5.93.70	10.5.93.70
8	10.5.93.71/32	10.5.93.71 – 10.5.93.71	10.5.93.71
9	10.5.93.72/32	10.5.93.72 – 10.5.93.72	10.5.93.72
10	10.5.93.73/32	10.5.93.73 – 10.5.93.73	10.5.93.73
11	10.5.93.74/32	10.5.93.74 – 10.5.93.74	10.5.93.74
12	10.5.93.75/32	10.5.93.75 – 10.5.93.75	10.5.93.75
13	10.5.93.76/32	10.5.93.76 – 10.5.93.76	10.5.93.76
14	10.5.93.77/32	10.5.93.77 – 10.5.93.77	10.5.93.77
15	10.5.93.78/32	10.5.93.78 – 10.5.93.78	10.5.93.78
16	10.5.93.79/32	10.5.93.79 – 10.5.93.79	10.5.93.79

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 /28
/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	-
/27	255.255.255.224	32	30	-
/28	255.255.255.240	16	14	1
/29	255.255.255.248	8	6	2 split →
/30	255.255.255.252	4	2	4 split →
/31	255.255.255.254	2	2	8 split →
/32	255.255.255.255	1	1	16 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 →