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)10.167.54.0/23

network10.167.54.0/23

broadcast10.167.55.255

first host10.167.54.1

last host10.167.55.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.54.0/23

address00001010.10100111.00110110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.00110110.00000000

broadcast00001010.10100111.00110111.11111111

green = network part, grey = host part

hex0x0aa73600

decimal178730496

reverse dns0.54.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3600

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.54.0/29	10.167.54.1 – 10.167.54.6	10.167.54.7
2	10.167.54.8/29	10.167.54.9 – 10.167.54.14	10.167.54.15
3	10.167.54.16/29	10.167.54.17 – 10.167.54.22	10.167.54.23
4	10.167.54.24/29	10.167.54.25 – 10.167.54.30	10.167.54.31
5	10.167.54.32/29	10.167.54.33 – 10.167.54.38	10.167.54.39
6	10.167.54.40/29	10.167.54.41 – 10.167.54.46	10.167.54.47
7	10.167.54.48/29	10.167.54.49 – 10.167.54.54	10.167.54.55
8	10.167.54.56/29	10.167.54.57 – 10.167.54.62	10.167.54.63
9	10.167.54.64/29	10.167.54.65 – 10.167.54.70	10.167.54.71
10	10.167.54.72/29	10.167.54.73 – 10.167.54.78	10.167.54.79
11	10.167.54.80/29	10.167.54.81 – 10.167.54.86	10.167.54.87
12	10.167.54.88/29	10.167.54.89 – 10.167.54.94	10.167.54.95
13	10.167.54.96/29	10.167.54.97 – 10.167.54.102	10.167.54.103
14	10.167.54.104/29	10.167.54.105 – 10.167.54.110	10.167.54.111
15	10.167.54.112/29	10.167.54.113 – 10.167.54.118	10.167.54.119
16	10.167.54.120/29	10.167.54.121 – 10.167.54.126	10.167.54.127
17	10.167.54.128/29	10.167.54.129 – 10.167.54.134	10.167.54.135
18	10.167.54.136/29	10.167.54.137 – 10.167.54.142	10.167.54.143
19	10.167.54.144/29	10.167.54.145 – 10.167.54.150	10.167.54.151
20	10.167.54.152/29	10.167.54.153 – 10.167.54.158	10.167.54.159
21	10.167.54.160/29	10.167.54.161 – 10.167.54.166	10.167.54.167
22	10.167.54.168/29	10.167.54.169 – 10.167.54.174	10.167.54.175
23	10.167.54.176/29	10.167.54.177 – 10.167.54.182	10.167.54.183
24	10.167.54.184/29	10.167.54.185 – 10.167.54.190	10.167.54.191
25	10.167.54.192/29	10.167.54.193 – 10.167.54.198	10.167.54.199
26	10.167.54.200/29	10.167.54.201 – 10.167.54.206	10.167.54.207
27	10.167.54.208/29	10.167.54.209 – 10.167.54.214	10.167.54.215
28	10.167.54.216/29	10.167.54.217 – 10.167.54.222	10.167.54.223
29	10.167.54.224/29	10.167.54.225 – 10.167.54.230	10.167.54.231
30	10.167.54.232/29	10.167.54.233 – 10.167.54.238	10.167.54.239
31	10.167.54.240/29	10.167.54.241 – 10.167.54.246	10.167.54.247
32	10.167.54.248/29	10.167.54.249 – 10.167.54.254	10.167.54.255
33	10.167.55.0/29	10.167.55.1 – 10.167.55.6	10.167.55.7
34	10.167.55.8/29	10.167.55.9 – 10.167.55.14	10.167.55.15
35	10.167.55.16/29	10.167.55.17 – 10.167.55.22	10.167.55.23
36	10.167.55.24/29	10.167.55.25 – 10.167.55.30	10.167.55.31
37	10.167.55.32/29	10.167.55.33 – 10.167.55.38	10.167.55.39
38	10.167.55.40/29	10.167.55.41 – 10.167.55.46	10.167.55.47
39	10.167.55.48/29	10.167.55.49 – 10.167.55.54	10.167.55.55
40	10.167.55.56/29	10.167.55.57 – 10.167.55.62	10.167.55.63
41	10.167.55.64/29	10.167.55.65 – 10.167.55.70	10.167.55.71
42	10.167.55.72/29	10.167.55.73 – 10.167.55.78	10.167.55.79
43	10.167.55.80/29	10.167.55.81 – 10.167.55.86	10.167.55.87
44	10.167.55.88/29	10.167.55.89 – 10.167.55.94	10.167.55.95
45	10.167.55.96/29	10.167.55.97 – 10.167.55.102	10.167.55.103
46	10.167.55.104/29	10.167.55.105 – 10.167.55.110	10.167.55.111
47	10.167.55.112/29	10.167.55.113 – 10.167.55.118	10.167.55.119
48	10.167.55.120/29	10.167.55.121 – 10.167.55.126	10.167.55.127
49	10.167.55.128/29	10.167.55.129 – 10.167.55.134	10.167.55.135
50	10.167.55.136/29	10.167.55.137 – 10.167.55.142	10.167.55.143
51	10.167.55.144/29	10.167.55.145 – 10.167.55.150	10.167.55.151
52	10.167.55.152/29	10.167.55.153 – 10.167.55.158	10.167.55.159
53	10.167.55.160/29	10.167.55.161 – 10.167.55.166	10.167.55.167
54	10.167.55.168/29	10.167.55.169 – 10.167.55.174	10.167.55.175
55	10.167.55.176/29	10.167.55.177 – 10.167.55.182	10.167.55.183
56	10.167.55.184/29	10.167.55.185 – 10.167.55.190	10.167.55.191
57	10.167.55.192/29	10.167.55.193 – 10.167.55.198	10.167.55.199
58	10.167.55.200/29	10.167.55.201 – 10.167.55.206	10.167.55.207
59	10.167.55.208/29	10.167.55.209 – 10.167.55.214	10.167.55.215
60	10.167.55.216/29	10.167.55.217 – 10.167.55.222	10.167.55.223
61	10.167.55.224/29	10.167.55.225 – 10.167.55.230	10.167.55.231
62	10.167.55.232/29	10.167.55.233 – 10.167.55.238	10.167.55.239
63	10.167.55.240/29	10.167.55.241 – 10.167.55.246	10.167.55.247
64	10.167.55.248/29	10.167.55.249 – 10.167.55.254	10.167.55.255

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 →