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)10.76.154.0/23

network10.76.154.0/23

broadcast10.76.155.255

first host10.76.154.1

last host10.76.155.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.76.154.0/23

address00001010.01001100.10011010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001100.10011010.00000000

broadcast00001010.01001100.10011011.11111111

green = network part, grey = host part

hex0x0a4c9a00

decimal172792320

reverse dns0.154.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:9a00

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.76.154.0/29	10.76.154.1 – 10.76.154.6	10.76.154.7
2	10.76.154.8/29	10.76.154.9 – 10.76.154.14	10.76.154.15
3	10.76.154.16/29	10.76.154.17 – 10.76.154.22	10.76.154.23
4	10.76.154.24/29	10.76.154.25 – 10.76.154.30	10.76.154.31
5	10.76.154.32/29	10.76.154.33 – 10.76.154.38	10.76.154.39
6	10.76.154.40/29	10.76.154.41 – 10.76.154.46	10.76.154.47
7	10.76.154.48/29	10.76.154.49 – 10.76.154.54	10.76.154.55
8	10.76.154.56/29	10.76.154.57 – 10.76.154.62	10.76.154.63
9	10.76.154.64/29	10.76.154.65 – 10.76.154.70	10.76.154.71
10	10.76.154.72/29	10.76.154.73 – 10.76.154.78	10.76.154.79
11	10.76.154.80/29	10.76.154.81 – 10.76.154.86	10.76.154.87
12	10.76.154.88/29	10.76.154.89 – 10.76.154.94	10.76.154.95
13	10.76.154.96/29	10.76.154.97 – 10.76.154.102	10.76.154.103
14	10.76.154.104/29	10.76.154.105 – 10.76.154.110	10.76.154.111
15	10.76.154.112/29	10.76.154.113 – 10.76.154.118	10.76.154.119
16	10.76.154.120/29	10.76.154.121 – 10.76.154.126	10.76.154.127
17	10.76.154.128/29	10.76.154.129 – 10.76.154.134	10.76.154.135
18	10.76.154.136/29	10.76.154.137 – 10.76.154.142	10.76.154.143
19	10.76.154.144/29	10.76.154.145 – 10.76.154.150	10.76.154.151
20	10.76.154.152/29	10.76.154.153 – 10.76.154.158	10.76.154.159
21	10.76.154.160/29	10.76.154.161 – 10.76.154.166	10.76.154.167
22	10.76.154.168/29	10.76.154.169 – 10.76.154.174	10.76.154.175
23	10.76.154.176/29	10.76.154.177 – 10.76.154.182	10.76.154.183
24	10.76.154.184/29	10.76.154.185 – 10.76.154.190	10.76.154.191
25	10.76.154.192/29	10.76.154.193 – 10.76.154.198	10.76.154.199
26	10.76.154.200/29	10.76.154.201 – 10.76.154.206	10.76.154.207
27	10.76.154.208/29	10.76.154.209 – 10.76.154.214	10.76.154.215
28	10.76.154.216/29	10.76.154.217 – 10.76.154.222	10.76.154.223
29	10.76.154.224/29	10.76.154.225 – 10.76.154.230	10.76.154.231
30	10.76.154.232/29	10.76.154.233 – 10.76.154.238	10.76.154.239
31	10.76.154.240/29	10.76.154.241 – 10.76.154.246	10.76.154.247
32	10.76.154.248/29	10.76.154.249 – 10.76.154.254	10.76.154.255
33	10.76.155.0/29	10.76.155.1 – 10.76.155.6	10.76.155.7
34	10.76.155.8/29	10.76.155.9 – 10.76.155.14	10.76.155.15
35	10.76.155.16/29	10.76.155.17 – 10.76.155.22	10.76.155.23
36	10.76.155.24/29	10.76.155.25 – 10.76.155.30	10.76.155.31
37	10.76.155.32/29	10.76.155.33 – 10.76.155.38	10.76.155.39
38	10.76.155.40/29	10.76.155.41 – 10.76.155.46	10.76.155.47
39	10.76.155.48/29	10.76.155.49 – 10.76.155.54	10.76.155.55
40	10.76.155.56/29	10.76.155.57 – 10.76.155.62	10.76.155.63
41	10.76.155.64/29	10.76.155.65 – 10.76.155.70	10.76.155.71
42	10.76.155.72/29	10.76.155.73 – 10.76.155.78	10.76.155.79
43	10.76.155.80/29	10.76.155.81 – 10.76.155.86	10.76.155.87
44	10.76.155.88/29	10.76.155.89 – 10.76.155.94	10.76.155.95
45	10.76.155.96/29	10.76.155.97 – 10.76.155.102	10.76.155.103
46	10.76.155.104/29	10.76.155.105 – 10.76.155.110	10.76.155.111
47	10.76.155.112/29	10.76.155.113 – 10.76.155.118	10.76.155.119
48	10.76.155.120/29	10.76.155.121 – 10.76.155.126	10.76.155.127
49	10.76.155.128/29	10.76.155.129 – 10.76.155.134	10.76.155.135
50	10.76.155.136/29	10.76.155.137 – 10.76.155.142	10.76.155.143
51	10.76.155.144/29	10.76.155.145 – 10.76.155.150	10.76.155.151
52	10.76.155.152/29	10.76.155.153 – 10.76.155.158	10.76.155.159
53	10.76.155.160/29	10.76.155.161 – 10.76.155.166	10.76.155.167
54	10.76.155.168/29	10.76.155.169 – 10.76.155.174	10.76.155.175
55	10.76.155.176/29	10.76.155.177 – 10.76.155.182	10.76.155.183
56	10.76.155.184/29	10.76.155.185 – 10.76.155.190	10.76.155.191
57	10.76.155.192/29	10.76.155.193 – 10.76.155.198	10.76.155.199
58	10.76.155.200/29	10.76.155.201 – 10.76.155.206	10.76.155.207
59	10.76.155.208/29	10.76.155.209 – 10.76.155.214	10.76.155.215
60	10.76.155.216/29	10.76.155.217 – 10.76.155.222	10.76.155.223
61	10.76.155.224/29	10.76.155.225 – 10.76.155.230	10.76.155.231
62	10.76.155.232/29	10.76.155.233 – 10.76.155.238	10.76.155.239
63	10.76.155.240/29	10.76.155.241 – 10.76.155.246	10.76.155.247
64	10.76.155.248/29	10.76.155.249 – 10.76.155.254	10.76.155.255

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 →