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)10.167.98.0/23

network10.167.98.0/23

broadcast10.167.99.255

first host10.167.98.1

last host10.167.99.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.98.0/23

address00001010.10100111.01100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.01100010.00000000

broadcast00001010.10100111.01100011.11111111

green = network part, grey = host part

hex0x0aa76200

decimal178741760

reverse dns0.98.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6200

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.98.0/29	10.167.98.1 – 10.167.98.6	10.167.98.7
2	10.167.98.8/29	10.167.98.9 – 10.167.98.14	10.167.98.15
3	10.167.98.16/29	10.167.98.17 – 10.167.98.22	10.167.98.23
4	10.167.98.24/29	10.167.98.25 – 10.167.98.30	10.167.98.31
5	10.167.98.32/29	10.167.98.33 – 10.167.98.38	10.167.98.39
6	10.167.98.40/29	10.167.98.41 – 10.167.98.46	10.167.98.47
7	10.167.98.48/29	10.167.98.49 – 10.167.98.54	10.167.98.55
8	10.167.98.56/29	10.167.98.57 – 10.167.98.62	10.167.98.63
9	10.167.98.64/29	10.167.98.65 – 10.167.98.70	10.167.98.71
10	10.167.98.72/29	10.167.98.73 – 10.167.98.78	10.167.98.79
11	10.167.98.80/29	10.167.98.81 – 10.167.98.86	10.167.98.87
12	10.167.98.88/29	10.167.98.89 – 10.167.98.94	10.167.98.95
13	10.167.98.96/29	10.167.98.97 – 10.167.98.102	10.167.98.103
14	10.167.98.104/29	10.167.98.105 – 10.167.98.110	10.167.98.111
15	10.167.98.112/29	10.167.98.113 – 10.167.98.118	10.167.98.119
16	10.167.98.120/29	10.167.98.121 – 10.167.98.126	10.167.98.127
17	10.167.98.128/29	10.167.98.129 – 10.167.98.134	10.167.98.135
18	10.167.98.136/29	10.167.98.137 – 10.167.98.142	10.167.98.143
19	10.167.98.144/29	10.167.98.145 – 10.167.98.150	10.167.98.151
20	10.167.98.152/29	10.167.98.153 – 10.167.98.158	10.167.98.159
21	10.167.98.160/29	10.167.98.161 – 10.167.98.166	10.167.98.167
22	10.167.98.168/29	10.167.98.169 – 10.167.98.174	10.167.98.175
23	10.167.98.176/29	10.167.98.177 – 10.167.98.182	10.167.98.183
24	10.167.98.184/29	10.167.98.185 – 10.167.98.190	10.167.98.191
25	10.167.98.192/29	10.167.98.193 – 10.167.98.198	10.167.98.199
26	10.167.98.200/29	10.167.98.201 – 10.167.98.206	10.167.98.207
27	10.167.98.208/29	10.167.98.209 – 10.167.98.214	10.167.98.215
28	10.167.98.216/29	10.167.98.217 – 10.167.98.222	10.167.98.223
29	10.167.98.224/29	10.167.98.225 – 10.167.98.230	10.167.98.231
30	10.167.98.232/29	10.167.98.233 – 10.167.98.238	10.167.98.239
31	10.167.98.240/29	10.167.98.241 – 10.167.98.246	10.167.98.247
32	10.167.98.248/29	10.167.98.249 – 10.167.98.254	10.167.98.255
33	10.167.99.0/29	10.167.99.1 – 10.167.99.6	10.167.99.7
34	10.167.99.8/29	10.167.99.9 – 10.167.99.14	10.167.99.15
35	10.167.99.16/29	10.167.99.17 – 10.167.99.22	10.167.99.23
36	10.167.99.24/29	10.167.99.25 – 10.167.99.30	10.167.99.31
37	10.167.99.32/29	10.167.99.33 – 10.167.99.38	10.167.99.39
38	10.167.99.40/29	10.167.99.41 – 10.167.99.46	10.167.99.47
39	10.167.99.48/29	10.167.99.49 – 10.167.99.54	10.167.99.55
40	10.167.99.56/29	10.167.99.57 – 10.167.99.62	10.167.99.63
41	10.167.99.64/29	10.167.99.65 – 10.167.99.70	10.167.99.71
42	10.167.99.72/29	10.167.99.73 – 10.167.99.78	10.167.99.79
43	10.167.99.80/29	10.167.99.81 – 10.167.99.86	10.167.99.87
44	10.167.99.88/29	10.167.99.89 – 10.167.99.94	10.167.99.95
45	10.167.99.96/29	10.167.99.97 – 10.167.99.102	10.167.99.103
46	10.167.99.104/29	10.167.99.105 – 10.167.99.110	10.167.99.111
47	10.167.99.112/29	10.167.99.113 – 10.167.99.118	10.167.99.119
48	10.167.99.120/29	10.167.99.121 – 10.167.99.126	10.167.99.127
49	10.167.99.128/29	10.167.99.129 – 10.167.99.134	10.167.99.135
50	10.167.99.136/29	10.167.99.137 – 10.167.99.142	10.167.99.143
51	10.167.99.144/29	10.167.99.145 – 10.167.99.150	10.167.99.151
52	10.167.99.152/29	10.167.99.153 – 10.167.99.158	10.167.99.159
53	10.167.99.160/29	10.167.99.161 – 10.167.99.166	10.167.99.167
54	10.167.99.168/29	10.167.99.169 – 10.167.99.174	10.167.99.175
55	10.167.99.176/29	10.167.99.177 – 10.167.99.182	10.167.99.183
56	10.167.99.184/29	10.167.99.185 – 10.167.99.190	10.167.99.191
57	10.167.99.192/29	10.167.99.193 – 10.167.99.198	10.167.99.199
58	10.167.99.200/29	10.167.99.201 – 10.167.99.206	10.167.99.207
59	10.167.99.208/29	10.167.99.209 – 10.167.99.214	10.167.99.215
60	10.167.99.216/29	10.167.99.217 – 10.167.99.222	10.167.99.223
61	10.167.99.224/29	10.167.99.225 – 10.167.99.230	10.167.99.231
62	10.167.99.232/29	10.167.99.233 – 10.167.99.238	10.167.99.239
63	10.167.99.240/29	10.167.99.241 – 10.167.99.246	10.167.99.247
64	10.167.99.248/29	10.167.99.249 – 10.167.99.254	10.167.99.255

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 →