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)10.4.56.0/22

network10.4.56.0/22

broadcast10.4.59.255

first host10.4.56.1

last host10.4.59.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.4.56.0/22

address00001010.00000100.00111000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000100.00111000.00000000

broadcast00001010.00000100.00111011.11111111

green = network part, grey = host part

hex0x0a043800

decimal168048640

reverse dns0.56.4.10.in-addr.arpa

ipv4-mapped::ffff:a04:3800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.4.56.0/29	10.4.56.1 – 10.4.56.6	10.4.56.7
2	10.4.56.8/29	10.4.56.9 – 10.4.56.14	10.4.56.15
3	10.4.56.16/29	10.4.56.17 – 10.4.56.22	10.4.56.23
4	10.4.56.24/29	10.4.56.25 – 10.4.56.30	10.4.56.31
5	10.4.56.32/29	10.4.56.33 – 10.4.56.38	10.4.56.39
6	10.4.56.40/29	10.4.56.41 – 10.4.56.46	10.4.56.47
7	10.4.56.48/29	10.4.56.49 – 10.4.56.54	10.4.56.55
8	10.4.56.56/29	10.4.56.57 – 10.4.56.62	10.4.56.63
9	10.4.56.64/29	10.4.56.65 – 10.4.56.70	10.4.56.71
10	10.4.56.72/29	10.4.56.73 – 10.4.56.78	10.4.56.79
11	10.4.56.80/29	10.4.56.81 – 10.4.56.86	10.4.56.87
12	10.4.56.88/29	10.4.56.89 – 10.4.56.94	10.4.56.95
13	10.4.56.96/29	10.4.56.97 – 10.4.56.102	10.4.56.103
14	10.4.56.104/29	10.4.56.105 – 10.4.56.110	10.4.56.111
15	10.4.56.112/29	10.4.56.113 – 10.4.56.118	10.4.56.119
16	10.4.56.120/29	10.4.56.121 – 10.4.56.126	10.4.56.127
17	10.4.56.128/29	10.4.56.129 – 10.4.56.134	10.4.56.135
18	10.4.56.136/29	10.4.56.137 – 10.4.56.142	10.4.56.143
19	10.4.56.144/29	10.4.56.145 – 10.4.56.150	10.4.56.151
20	10.4.56.152/29	10.4.56.153 – 10.4.56.158	10.4.56.159
21	10.4.56.160/29	10.4.56.161 – 10.4.56.166	10.4.56.167
22	10.4.56.168/29	10.4.56.169 – 10.4.56.174	10.4.56.175
23	10.4.56.176/29	10.4.56.177 – 10.4.56.182	10.4.56.183
24	10.4.56.184/29	10.4.56.185 – 10.4.56.190	10.4.56.191
25	10.4.56.192/29	10.4.56.193 – 10.4.56.198	10.4.56.199
26	10.4.56.200/29	10.4.56.201 – 10.4.56.206	10.4.56.207
27	10.4.56.208/29	10.4.56.209 – 10.4.56.214	10.4.56.215
28	10.4.56.216/29	10.4.56.217 – 10.4.56.222	10.4.56.223
29	10.4.56.224/29	10.4.56.225 – 10.4.56.230	10.4.56.231
30	10.4.56.232/29	10.4.56.233 – 10.4.56.238	10.4.56.239
31	10.4.56.240/29	10.4.56.241 – 10.4.56.246	10.4.56.247
32	10.4.56.248/29	10.4.56.249 – 10.4.56.254	10.4.56.255
33	10.4.57.0/29	10.4.57.1 – 10.4.57.6	10.4.57.7
34	10.4.57.8/29	10.4.57.9 – 10.4.57.14	10.4.57.15
35	10.4.57.16/29	10.4.57.17 – 10.4.57.22	10.4.57.23
36	10.4.57.24/29	10.4.57.25 – 10.4.57.30	10.4.57.31
37	10.4.57.32/29	10.4.57.33 – 10.4.57.38	10.4.57.39
38	10.4.57.40/29	10.4.57.41 – 10.4.57.46	10.4.57.47
39	10.4.57.48/29	10.4.57.49 – 10.4.57.54	10.4.57.55
40	10.4.57.56/29	10.4.57.57 – 10.4.57.62	10.4.57.63
41	10.4.57.64/29	10.4.57.65 – 10.4.57.70	10.4.57.71
42	10.4.57.72/29	10.4.57.73 – 10.4.57.78	10.4.57.79
43	10.4.57.80/29	10.4.57.81 – 10.4.57.86	10.4.57.87
44	10.4.57.88/29	10.4.57.89 – 10.4.57.94	10.4.57.95
45	10.4.57.96/29	10.4.57.97 – 10.4.57.102	10.4.57.103
46	10.4.57.104/29	10.4.57.105 – 10.4.57.110	10.4.57.111
47	10.4.57.112/29	10.4.57.113 – 10.4.57.118	10.4.57.119
48	10.4.57.120/29	10.4.57.121 – 10.4.57.126	10.4.57.127
49	10.4.57.128/29	10.4.57.129 – 10.4.57.134	10.4.57.135
50	10.4.57.136/29	10.4.57.137 – 10.4.57.142	10.4.57.143
51	10.4.57.144/29	10.4.57.145 – 10.4.57.150	10.4.57.151
52	10.4.57.152/29	10.4.57.153 – 10.4.57.158	10.4.57.159
53	10.4.57.160/29	10.4.57.161 – 10.4.57.166	10.4.57.167
54	10.4.57.168/29	10.4.57.169 – 10.4.57.174	10.4.57.175
55	10.4.57.176/29	10.4.57.177 – 10.4.57.182	10.4.57.183
56	10.4.57.184/29	10.4.57.185 – 10.4.57.190	10.4.57.191
57	10.4.57.192/29	10.4.57.193 – 10.4.57.198	10.4.57.199
58	10.4.57.200/29	10.4.57.201 – 10.4.57.206	10.4.57.207
59	10.4.57.208/29	10.4.57.209 – 10.4.57.214	10.4.57.215
60	10.4.57.216/29	10.4.57.217 – 10.4.57.222	10.4.57.223
61	10.4.57.224/29	10.4.57.225 – 10.4.57.230	10.4.57.231
62	10.4.57.232/29	10.4.57.233 – 10.4.57.238	10.4.57.239
63	10.4.57.240/29	10.4.57.241 – 10.4.57.246	10.4.57.247
64	10.4.57.248/29	10.4.57.249 – 10.4.57.254	10.4.57.255
65	10.4.58.0/29	10.4.58.1 – 10.4.58.6	10.4.58.7
66	10.4.58.8/29	10.4.58.9 – 10.4.58.14	10.4.58.15
67	10.4.58.16/29	10.4.58.17 – 10.4.58.22	10.4.58.23
68	10.4.58.24/29	10.4.58.25 – 10.4.58.30	10.4.58.31
69	10.4.58.32/29	10.4.58.33 – 10.4.58.38	10.4.58.39
70	10.4.58.40/29	10.4.58.41 – 10.4.58.46	10.4.58.47
71	10.4.58.48/29	10.4.58.49 – 10.4.58.54	10.4.58.55
72	10.4.58.56/29	10.4.58.57 – 10.4.58.62	10.4.58.63
73	10.4.58.64/29	10.4.58.65 – 10.4.58.70	10.4.58.71
74	10.4.58.72/29	10.4.58.73 – 10.4.58.78	10.4.58.79
75	10.4.58.80/29	10.4.58.81 – 10.4.58.86	10.4.58.87
76	10.4.58.88/29	10.4.58.89 – 10.4.58.94	10.4.58.95
77	10.4.58.96/29	10.4.58.97 – 10.4.58.102	10.4.58.103
78	10.4.58.104/29	10.4.58.105 – 10.4.58.110	10.4.58.111
79	10.4.58.112/29	10.4.58.113 – 10.4.58.118	10.4.58.119
80	10.4.58.120/29	10.4.58.121 – 10.4.58.126	10.4.58.127
81	10.4.58.128/29	10.4.58.129 – 10.4.58.134	10.4.58.135
82	10.4.58.136/29	10.4.58.137 – 10.4.58.142	10.4.58.143
83	10.4.58.144/29	10.4.58.145 – 10.4.58.150	10.4.58.151
84	10.4.58.152/29	10.4.58.153 – 10.4.58.158	10.4.58.159
85	10.4.58.160/29	10.4.58.161 – 10.4.58.166	10.4.58.167
86	10.4.58.168/29	10.4.58.169 – 10.4.58.174	10.4.58.175
87	10.4.58.176/29	10.4.58.177 – 10.4.58.182	10.4.58.183
88	10.4.58.184/29	10.4.58.185 – 10.4.58.190	10.4.58.191
89	10.4.58.192/29	10.4.58.193 – 10.4.58.198	10.4.58.199
90	10.4.58.200/29	10.4.58.201 – 10.4.58.206	10.4.58.207
91	10.4.58.208/29	10.4.58.209 – 10.4.58.214	10.4.58.215
92	10.4.58.216/29	10.4.58.217 – 10.4.58.222	10.4.58.223
93	10.4.58.224/29	10.4.58.225 – 10.4.58.230	10.4.58.231
94	10.4.58.232/29	10.4.58.233 – 10.4.58.238	10.4.58.239
95	10.4.58.240/29	10.4.58.241 – 10.4.58.246	10.4.58.247
96	10.4.58.248/29	10.4.58.249 – 10.4.58.254	10.4.58.255
97	10.4.59.0/29	10.4.59.1 – 10.4.59.6	10.4.59.7
98	10.4.59.8/29	10.4.59.9 – 10.4.59.14	10.4.59.15
99	10.4.59.16/29	10.4.59.17 – 10.4.59.22	10.4.59.23
100	10.4.59.24/29	10.4.59.25 – 10.4.59.30	10.4.59.31
101	10.4.59.32/29	10.4.59.33 – 10.4.59.38	10.4.59.39
102	10.4.59.40/29	10.4.59.41 – 10.4.59.46	10.4.59.47
103	10.4.59.48/29	10.4.59.49 – 10.4.59.54	10.4.59.55
104	10.4.59.56/29	10.4.59.57 – 10.4.59.62	10.4.59.63
105	10.4.59.64/29	10.4.59.65 – 10.4.59.70	10.4.59.71
106	10.4.59.72/29	10.4.59.73 – 10.4.59.78	10.4.59.79
107	10.4.59.80/29	10.4.59.81 – 10.4.59.86	10.4.59.87
108	10.4.59.88/29	10.4.59.89 – 10.4.59.94	10.4.59.95
109	10.4.59.96/29	10.4.59.97 – 10.4.59.102	10.4.59.103
110	10.4.59.104/29	10.4.59.105 – 10.4.59.110	10.4.59.111
111	10.4.59.112/29	10.4.59.113 – 10.4.59.118	10.4.59.119
112	10.4.59.120/29	10.4.59.121 – 10.4.59.126	10.4.59.127
113	10.4.59.128/29	10.4.59.129 – 10.4.59.134	10.4.59.135
114	10.4.59.136/29	10.4.59.137 – 10.4.59.142	10.4.59.143
115	10.4.59.144/29	10.4.59.145 – 10.4.59.150	10.4.59.151
116	10.4.59.152/29	10.4.59.153 – 10.4.59.158	10.4.59.159
117	10.4.59.160/29	10.4.59.161 – 10.4.59.166	10.4.59.167
118	10.4.59.168/29	10.4.59.169 – 10.4.59.174	10.4.59.175
119	10.4.59.176/29	10.4.59.177 – 10.4.59.182	10.4.59.183
120	10.4.59.184/29	10.4.59.185 – 10.4.59.190	10.4.59.191
121	10.4.59.192/29	10.4.59.193 – 10.4.59.198	10.4.59.199
122	10.4.59.200/29	10.4.59.201 – 10.4.59.206	10.4.59.207
123	10.4.59.208/29	10.4.59.209 – 10.4.59.214	10.4.59.215
124	10.4.59.216/29	10.4.59.217 – 10.4.59.222	10.4.59.223
125	10.4.59.224/29	10.4.59.225 – 10.4.59.230	10.4.59.231
126	10.4.59.232/29	10.4.59.233 – 10.4.59.238	10.4.59.239
127	10.4.59.240/29	10.4.59.241 – 10.4.59.246	10.4.59.247
128	10.4.59.248/29	10.4.59.249 – 10.4.59.254	10.4.59.255

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →