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)10.167.152.0/23

network10.167.152.0/23

broadcast10.167.153.255

first host10.167.152.1

last host10.167.153.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.152.0/23

address00001010.10100111.10011000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.10011000.00000000

broadcast00001010.10100111.10011001.11111111

green = network part, grey = host part

hex0x0aa79800

decimal178755584

reverse dns0.152.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:9800

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.152.0/29	10.167.152.1 – 10.167.152.6	10.167.152.7
2	10.167.152.8/29	10.167.152.9 – 10.167.152.14	10.167.152.15
3	10.167.152.16/29	10.167.152.17 – 10.167.152.22	10.167.152.23
4	10.167.152.24/29	10.167.152.25 – 10.167.152.30	10.167.152.31
5	10.167.152.32/29	10.167.152.33 – 10.167.152.38	10.167.152.39
6	10.167.152.40/29	10.167.152.41 – 10.167.152.46	10.167.152.47
7	10.167.152.48/29	10.167.152.49 – 10.167.152.54	10.167.152.55
8	10.167.152.56/29	10.167.152.57 – 10.167.152.62	10.167.152.63
9	10.167.152.64/29	10.167.152.65 – 10.167.152.70	10.167.152.71
10	10.167.152.72/29	10.167.152.73 – 10.167.152.78	10.167.152.79
11	10.167.152.80/29	10.167.152.81 – 10.167.152.86	10.167.152.87
12	10.167.152.88/29	10.167.152.89 – 10.167.152.94	10.167.152.95
13	10.167.152.96/29	10.167.152.97 – 10.167.152.102	10.167.152.103
14	10.167.152.104/29	10.167.152.105 – 10.167.152.110	10.167.152.111
15	10.167.152.112/29	10.167.152.113 – 10.167.152.118	10.167.152.119
16	10.167.152.120/29	10.167.152.121 – 10.167.152.126	10.167.152.127
17	10.167.152.128/29	10.167.152.129 – 10.167.152.134	10.167.152.135
18	10.167.152.136/29	10.167.152.137 – 10.167.152.142	10.167.152.143
19	10.167.152.144/29	10.167.152.145 – 10.167.152.150	10.167.152.151
20	10.167.152.152/29	10.167.152.153 – 10.167.152.158	10.167.152.159
21	10.167.152.160/29	10.167.152.161 – 10.167.152.166	10.167.152.167
22	10.167.152.168/29	10.167.152.169 – 10.167.152.174	10.167.152.175
23	10.167.152.176/29	10.167.152.177 – 10.167.152.182	10.167.152.183
24	10.167.152.184/29	10.167.152.185 – 10.167.152.190	10.167.152.191
25	10.167.152.192/29	10.167.152.193 – 10.167.152.198	10.167.152.199
26	10.167.152.200/29	10.167.152.201 – 10.167.152.206	10.167.152.207
27	10.167.152.208/29	10.167.152.209 – 10.167.152.214	10.167.152.215
28	10.167.152.216/29	10.167.152.217 – 10.167.152.222	10.167.152.223
29	10.167.152.224/29	10.167.152.225 – 10.167.152.230	10.167.152.231
30	10.167.152.232/29	10.167.152.233 – 10.167.152.238	10.167.152.239
31	10.167.152.240/29	10.167.152.241 – 10.167.152.246	10.167.152.247
32	10.167.152.248/29	10.167.152.249 – 10.167.152.254	10.167.152.255
33	10.167.153.0/29	10.167.153.1 – 10.167.153.6	10.167.153.7
34	10.167.153.8/29	10.167.153.9 – 10.167.153.14	10.167.153.15
35	10.167.153.16/29	10.167.153.17 – 10.167.153.22	10.167.153.23
36	10.167.153.24/29	10.167.153.25 – 10.167.153.30	10.167.153.31
37	10.167.153.32/29	10.167.153.33 – 10.167.153.38	10.167.153.39
38	10.167.153.40/29	10.167.153.41 – 10.167.153.46	10.167.153.47
39	10.167.153.48/29	10.167.153.49 – 10.167.153.54	10.167.153.55
40	10.167.153.56/29	10.167.153.57 – 10.167.153.62	10.167.153.63
41	10.167.153.64/29	10.167.153.65 – 10.167.153.70	10.167.153.71
42	10.167.153.72/29	10.167.153.73 – 10.167.153.78	10.167.153.79
43	10.167.153.80/29	10.167.153.81 – 10.167.153.86	10.167.153.87
44	10.167.153.88/29	10.167.153.89 – 10.167.153.94	10.167.153.95
45	10.167.153.96/29	10.167.153.97 – 10.167.153.102	10.167.153.103
46	10.167.153.104/29	10.167.153.105 – 10.167.153.110	10.167.153.111
47	10.167.153.112/29	10.167.153.113 – 10.167.153.118	10.167.153.119
48	10.167.153.120/29	10.167.153.121 – 10.167.153.126	10.167.153.127
49	10.167.153.128/29	10.167.153.129 – 10.167.153.134	10.167.153.135
50	10.167.153.136/29	10.167.153.137 – 10.167.153.142	10.167.153.143
51	10.167.153.144/29	10.167.153.145 – 10.167.153.150	10.167.153.151
52	10.167.153.152/29	10.167.153.153 – 10.167.153.158	10.167.153.159
53	10.167.153.160/29	10.167.153.161 – 10.167.153.166	10.167.153.167
54	10.167.153.168/29	10.167.153.169 – 10.167.153.174	10.167.153.175
55	10.167.153.176/29	10.167.153.177 – 10.167.153.182	10.167.153.183
56	10.167.153.184/29	10.167.153.185 – 10.167.153.190	10.167.153.191
57	10.167.153.192/29	10.167.153.193 – 10.167.153.198	10.167.153.199
58	10.167.153.200/29	10.167.153.201 – 10.167.153.206	10.167.153.207
59	10.167.153.208/29	10.167.153.209 – 10.167.153.214	10.167.153.215
60	10.167.153.216/29	10.167.153.217 – 10.167.153.222	10.167.153.223
61	10.167.153.224/29	10.167.153.225 – 10.167.153.230	10.167.153.231
62	10.167.153.232/29	10.167.153.233 – 10.167.153.238	10.167.153.239
63	10.167.153.240/29	10.167.153.241 – 10.167.153.246	10.167.153.247
64	10.167.153.248/29	10.167.153.249 – 10.167.153.254	10.167.153.255

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 →