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)10.167.60.0/23

network10.167.60.0/23

broadcast10.167.61.255

first host10.167.60.1

last host10.167.61.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.60.0/23

address00001010.10100111.00111100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.00111100.00000000

broadcast00001010.10100111.00111101.11111111

green = network part, grey = host part

hex0x0aa73c00

decimal178732032

reverse dns0.60.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3c00

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.60.0/29	10.167.60.1 – 10.167.60.6	10.167.60.7
2	10.167.60.8/29	10.167.60.9 – 10.167.60.14	10.167.60.15
3	10.167.60.16/29	10.167.60.17 – 10.167.60.22	10.167.60.23
4	10.167.60.24/29	10.167.60.25 – 10.167.60.30	10.167.60.31
5	10.167.60.32/29	10.167.60.33 – 10.167.60.38	10.167.60.39
6	10.167.60.40/29	10.167.60.41 – 10.167.60.46	10.167.60.47
7	10.167.60.48/29	10.167.60.49 – 10.167.60.54	10.167.60.55
8	10.167.60.56/29	10.167.60.57 – 10.167.60.62	10.167.60.63
9	10.167.60.64/29	10.167.60.65 – 10.167.60.70	10.167.60.71
10	10.167.60.72/29	10.167.60.73 – 10.167.60.78	10.167.60.79
11	10.167.60.80/29	10.167.60.81 – 10.167.60.86	10.167.60.87
12	10.167.60.88/29	10.167.60.89 – 10.167.60.94	10.167.60.95
13	10.167.60.96/29	10.167.60.97 – 10.167.60.102	10.167.60.103
14	10.167.60.104/29	10.167.60.105 – 10.167.60.110	10.167.60.111
15	10.167.60.112/29	10.167.60.113 – 10.167.60.118	10.167.60.119
16	10.167.60.120/29	10.167.60.121 – 10.167.60.126	10.167.60.127
17	10.167.60.128/29	10.167.60.129 – 10.167.60.134	10.167.60.135
18	10.167.60.136/29	10.167.60.137 – 10.167.60.142	10.167.60.143
19	10.167.60.144/29	10.167.60.145 – 10.167.60.150	10.167.60.151
20	10.167.60.152/29	10.167.60.153 – 10.167.60.158	10.167.60.159
21	10.167.60.160/29	10.167.60.161 – 10.167.60.166	10.167.60.167
22	10.167.60.168/29	10.167.60.169 – 10.167.60.174	10.167.60.175
23	10.167.60.176/29	10.167.60.177 – 10.167.60.182	10.167.60.183
24	10.167.60.184/29	10.167.60.185 – 10.167.60.190	10.167.60.191
25	10.167.60.192/29	10.167.60.193 – 10.167.60.198	10.167.60.199
26	10.167.60.200/29	10.167.60.201 – 10.167.60.206	10.167.60.207
27	10.167.60.208/29	10.167.60.209 – 10.167.60.214	10.167.60.215
28	10.167.60.216/29	10.167.60.217 – 10.167.60.222	10.167.60.223
29	10.167.60.224/29	10.167.60.225 – 10.167.60.230	10.167.60.231
30	10.167.60.232/29	10.167.60.233 – 10.167.60.238	10.167.60.239
31	10.167.60.240/29	10.167.60.241 – 10.167.60.246	10.167.60.247
32	10.167.60.248/29	10.167.60.249 – 10.167.60.254	10.167.60.255
33	10.167.61.0/29	10.167.61.1 – 10.167.61.6	10.167.61.7
34	10.167.61.8/29	10.167.61.9 – 10.167.61.14	10.167.61.15
35	10.167.61.16/29	10.167.61.17 – 10.167.61.22	10.167.61.23
36	10.167.61.24/29	10.167.61.25 – 10.167.61.30	10.167.61.31
37	10.167.61.32/29	10.167.61.33 – 10.167.61.38	10.167.61.39
38	10.167.61.40/29	10.167.61.41 – 10.167.61.46	10.167.61.47
39	10.167.61.48/29	10.167.61.49 – 10.167.61.54	10.167.61.55
40	10.167.61.56/29	10.167.61.57 – 10.167.61.62	10.167.61.63
41	10.167.61.64/29	10.167.61.65 – 10.167.61.70	10.167.61.71
42	10.167.61.72/29	10.167.61.73 – 10.167.61.78	10.167.61.79
43	10.167.61.80/29	10.167.61.81 – 10.167.61.86	10.167.61.87
44	10.167.61.88/29	10.167.61.89 – 10.167.61.94	10.167.61.95
45	10.167.61.96/29	10.167.61.97 – 10.167.61.102	10.167.61.103
46	10.167.61.104/29	10.167.61.105 – 10.167.61.110	10.167.61.111
47	10.167.61.112/29	10.167.61.113 – 10.167.61.118	10.167.61.119
48	10.167.61.120/29	10.167.61.121 – 10.167.61.126	10.167.61.127
49	10.167.61.128/29	10.167.61.129 – 10.167.61.134	10.167.61.135
50	10.167.61.136/29	10.167.61.137 – 10.167.61.142	10.167.61.143
51	10.167.61.144/29	10.167.61.145 – 10.167.61.150	10.167.61.151
52	10.167.61.152/29	10.167.61.153 – 10.167.61.158	10.167.61.159
53	10.167.61.160/29	10.167.61.161 – 10.167.61.166	10.167.61.167
54	10.167.61.168/29	10.167.61.169 – 10.167.61.174	10.167.61.175
55	10.167.61.176/29	10.167.61.177 – 10.167.61.182	10.167.61.183
56	10.167.61.184/29	10.167.61.185 – 10.167.61.190	10.167.61.191
57	10.167.61.192/29	10.167.61.193 – 10.167.61.198	10.167.61.199
58	10.167.61.200/29	10.167.61.201 – 10.167.61.206	10.167.61.207
59	10.167.61.208/29	10.167.61.209 – 10.167.61.214	10.167.61.215
60	10.167.61.216/29	10.167.61.217 – 10.167.61.222	10.167.61.223
61	10.167.61.224/29	10.167.61.225 – 10.167.61.230	10.167.61.231
62	10.167.61.232/29	10.167.61.233 – 10.167.61.238	10.167.61.239
63	10.167.61.240/29	10.167.61.241 – 10.167.61.246	10.167.61.247
64	10.167.61.248/29	10.167.61.249 – 10.167.61.254	10.167.61.255

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 →