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)10.3.212.0/22

network10.3.212.0/22

broadcast10.3.215.255

first host10.3.212.1

last host10.3.215.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.212.0/22

address00001010.00000011.11010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.11010100.00000000

broadcast00001010.00000011.11010111.11111111

green = network part, grey = host part

hex0x0a03d400

decimal168023040

reverse dns0.212.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:d400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.212.0/29	10.3.212.1 – 10.3.212.6	10.3.212.7
2	10.3.212.8/29	10.3.212.9 – 10.3.212.14	10.3.212.15
3	10.3.212.16/29	10.3.212.17 – 10.3.212.22	10.3.212.23
4	10.3.212.24/29	10.3.212.25 – 10.3.212.30	10.3.212.31
5	10.3.212.32/29	10.3.212.33 – 10.3.212.38	10.3.212.39
6	10.3.212.40/29	10.3.212.41 – 10.3.212.46	10.3.212.47
7	10.3.212.48/29	10.3.212.49 – 10.3.212.54	10.3.212.55
8	10.3.212.56/29	10.3.212.57 – 10.3.212.62	10.3.212.63
9	10.3.212.64/29	10.3.212.65 – 10.3.212.70	10.3.212.71
10	10.3.212.72/29	10.3.212.73 – 10.3.212.78	10.3.212.79
11	10.3.212.80/29	10.3.212.81 – 10.3.212.86	10.3.212.87
12	10.3.212.88/29	10.3.212.89 – 10.3.212.94	10.3.212.95
13	10.3.212.96/29	10.3.212.97 – 10.3.212.102	10.3.212.103
14	10.3.212.104/29	10.3.212.105 – 10.3.212.110	10.3.212.111
15	10.3.212.112/29	10.3.212.113 – 10.3.212.118	10.3.212.119
16	10.3.212.120/29	10.3.212.121 – 10.3.212.126	10.3.212.127
17	10.3.212.128/29	10.3.212.129 – 10.3.212.134	10.3.212.135
18	10.3.212.136/29	10.3.212.137 – 10.3.212.142	10.3.212.143
19	10.3.212.144/29	10.3.212.145 – 10.3.212.150	10.3.212.151
20	10.3.212.152/29	10.3.212.153 – 10.3.212.158	10.3.212.159
21	10.3.212.160/29	10.3.212.161 – 10.3.212.166	10.3.212.167
22	10.3.212.168/29	10.3.212.169 – 10.3.212.174	10.3.212.175
23	10.3.212.176/29	10.3.212.177 – 10.3.212.182	10.3.212.183
24	10.3.212.184/29	10.3.212.185 – 10.3.212.190	10.3.212.191
25	10.3.212.192/29	10.3.212.193 – 10.3.212.198	10.3.212.199
26	10.3.212.200/29	10.3.212.201 – 10.3.212.206	10.3.212.207
27	10.3.212.208/29	10.3.212.209 – 10.3.212.214	10.3.212.215
28	10.3.212.216/29	10.3.212.217 – 10.3.212.222	10.3.212.223
29	10.3.212.224/29	10.3.212.225 – 10.3.212.230	10.3.212.231
30	10.3.212.232/29	10.3.212.233 – 10.3.212.238	10.3.212.239
31	10.3.212.240/29	10.3.212.241 – 10.3.212.246	10.3.212.247
32	10.3.212.248/29	10.3.212.249 – 10.3.212.254	10.3.212.255
33	10.3.213.0/29	10.3.213.1 – 10.3.213.6	10.3.213.7
34	10.3.213.8/29	10.3.213.9 – 10.3.213.14	10.3.213.15
35	10.3.213.16/29	10.3.213.17 – 10.3.213.22	10.3.213.23
36	10.3.213.24/29	10.3.213.25 – 10.3.213.30	10.3.213.31
37	10.3.213.32/29	10.3.213.33 – 10.3.213.38	10.3.213.39
38	10.3.213.40/29	10.3.213.41 – 10.3.213.46	10.3.213.47
39	10.3.213.48/29	10.3.213.49 – 10.3.213.54	10.3.213.55
40	10.3.213.56/29	10.3.213.57 – 10.3.213.62	10.3.213.63
41	10.3.213.64/29	10.3.213.65 – 10.3.213.70	10.3.213.71
42	10.3.213.72/29	10.3.213.73 – 10.3.213.78	10.3.213.79
43	10.3.213.80/29	10.3.213.81 – 10.3.213.86	10.3.213.87
44	10.3.213.88/29	10.3.213.89 – 10.3.213.94	10.3.213.95
45	10.3.213.96/29	10.3.213.97 – 10.3.213.102	10.3.213.103
46	10.3.213.104/29	10.3.213.105 – 10.3.213.110	10.3.213.111
47	10.3.213.112/29	10.3.213.113 – 10.3.213.118	10.3.213.119
48	10.3.213.120/29	10.3.213.121 – 10.3.213.126	10.3.213.127
49	10.3.213.128/29	10.3.213.129 – 10.3.213.134	10.3.213.135
50	10.3.213.136/29	10.3.213.137 – 10.3.213.142	10.3.213.143
51	10.3.213.144/29	10.3.213.145 – 10.3.213.150	10.3.213.151
52	10.3.213.152/29	10.3.213.153 – 10.3.213.158	10.3.213.159
53	10.3.213.160/29	10.3.213.161 – 10.3.213.166	10.3.213.167
54	10.3.213.168/29	10.3.213.169 – 10.3.213.174	10.3.213.175
55	10.3.213.176/29	10.3.213.177 – 10.3.213.182	10.3.213.183
56	10.3.213.184/29	10.3.213.185 – 10.3.213.190	10.3.213.191
57	10.3.213.192/29	10.3.213.193 – 10.3.213.198	10.3.213.199
58	10.3.213.200/29	10.3.213.201 – 10.3.213.206	10.3.213.207
59	10.3.213.208/29	10.3.213.209 – 10.3.213.214	10.3.213.215
60	10.3.213.216/29	10.3.213.217 – 10.3.213.222	10.3.213.223
61	10.3.213.224/29	10.3.213.225 – 10.3.213.230	10.3.213.231
62	10.3.213.232/29	10.3.213.233 – 10.3.213.238	10.3.213.239
63	10.3.213.240/29	10.3.213.241 – 10.3.213.246	10.3.213.247
64	10.3.213.248/29	10.3.213.249 – 10.3.213.254	10.3.213.255
65	10.3.214.0/29	10.3.214.1 – 10.3.214.6	10.3.214.7
66	10.3.214.8/29	10.3.214.9 – 10.3.214.14	10.3.214.15
67	10.3.214.16/29	10.3.214.17 – 10.3.214.22	10.3.214.23
68	10.3.214.24/29	10.3.214.25 – 10.3.214.30	10.3.214.31
69	10.3.214.32/29	10.3.214.33 – 10.3.214.38	10.3.214.39
70	10.3.214.40/29	10.3.214.41 – 10.3.214.46	10.3.214.47
71	10.3.214.48/29	10.3.214.49 – 10.3.214.54	10.3.214.55
72	10.3.214.56/29	10.3.214.57 – 10.3.214.62	10.3.214.63
73	10.3.214.64/29	10.3.214.65 – 10.3.214.70	10.3.214.71
74	10.3.214.72/29	10.3.214.73 – 10.3.214.78	10.3.214.79
75	10.3.214.80/29	10.3.214.81 – 10.3.214.86	10.3.214.87
76	10.3.214.88/29	10.3.214.89 – 10.3.214.94	10.3.214.95
77	10.3.214.96/29	10.3.214.97 – 10.3.214.102	10.3.214.103
78	10.3.214.104/29	10.3.214.105 – 10.3.214.110	10.3.214.111
79	10.3.214.112/29	10.3.214.113 – 10.3.214.118	10.3.214.119
80	10.3.214.120/29	10.3.214.121 – 10.3.214.126	10.3.214.127
81	10.3.214.128/29	10.3.214.129 – 10.3.214.134	10.3.214.135
82	10.3.214.136/29	10.3.214.137 – 10.3.214.142	10.3.214.143
83	10.3.214.144/29	10.3.214.145 – 10.3.214.150	10.3.214.151
84	10.3.214.152/29	10.3.214.153 – 10.3.214.158	10.3.214.159
85	10.3.214.160/29	10.3.214.161 – 10.3.214.166	10.3.214.167
86	10.3.214.168/29	10.3.214.169 – 10.3.214.174	10.3.214.175
87	10.3.214.176/29	10.3.214.177 – 10.3.214.182	10.3.214.183
88	10.3.214.184/29	10.3.214.185 – 10.3.214.190	10.3.214.191
89	10.3.214.192/29	10.3.214.193 – 10.3.214.198	10.3.214.199
90	10.3.214.200/29	10.3.214.201 – 10.3.214.206	10.3.214.207
91	10.3.214.208/29	10.3.214.209 – 10.3.214.214	10.3.214.215
92	10.3.214.216/29	10.3.214.217 – 10.3.214.222	10.3.214.223
93	10.3.214.224/29	10.3.214.225 – 10.3.214.230	10.3.214.231
94	10.3.214.232/29	10.3.214.233 – 10.3.214.238	10.3.214.239
95	10.3.214.240/29	10.3.214.241 – 10.3.214.246	10.3.214.247
96	10.3.214.248/29	10.3.214.249 – 10.3.214.254	10.3.214.255
97	10.3.215.0/29	10.3.215.1 – 10.3.215.6	10.3.215.7
98	10.3.215.8/29	10.3.215.9 – 10.3.215.14	10.3.215.15
99	10.3.215.16/29	10.3.215.17 – 10.3.215.22	10.3.215.23
100	10.3.215.24/29	10.3.215.25 – 10.3.215.30	10.3.215.31
101	10.3.215.32/29	10.3.215.33 – 10.3.215.38	10.3.215.39
102	10.3.215.40/29	10.3.215.41 – 10.3.215.46	10.3.215.47
103	10.3.215.48/29	10.3.215.49 – 10.3.215.54	10.3.215.55
104	10.3.215.56/29	10.3.215.57 – 10.3.215.62	10.3.215.63
105	10.3.215.64/29	10.3.215.65 – 10.3.215.70	10.3.215.71
106	10.3.215.72/29	10.3.215.73 – 10.3.215.78	10.3.215.79
107	10.3.215.80/29	10.3.215.81 – 10.3.215.86	10.3.215.87
108	10.3.215.88/29	10.3.215.89 – 10.3.215.94	10.3.215.95
109	10.3.215.96/29	10.3.215.97 – 10.3.215.102	10.3.215.103
110	10.3.215.104/29	10.3.215.105 – 10.3.215.110	10.3.215.111
111	10.3.215.112/29	10.3.215.113 – 10.3.215.118	10.3.215.119
112	10.3.215.120/29	10.3.215.121 – 10.3.215.126	10.3.215.127
113	10.3.215.128/29	10.3.215.129 – 10.3.215.134	10.3.215.135
114	10.3.215.136/29	10.3.215.137 – 10.3.215.142	10.3.215.143
115	10.3.215.144/29	10.3.215.145 – 10.3.215.150	10.3.215.151
116	10.3.215.152/29	10.3.215.153 – 10.3.215.158	10.3.215.159
117	10.3.215.160/29	10.3.215.161 – 10.3.215.166	10.3.215.167
118	10.3.215.168/29	10.3.215.169 – 10.3.215.174	10.3.215.175
119	10.3.215.176/29	10.3.215.177 – 10.3.215.182	10.3.215.183
120	10.3.215.184/29	10.3.215.185 – 10.3.215.190	10.3.215.191
121	10.3.215.192/29	10.3.215.193 – 10.3.215.198	10.3.215.199
122	10.3.215.200/29	10.3.215.201 – 10.3.215.206	10.3.215.207
123	10.3.215.208/29	10.3.215.209 – 10.3.215.214	10.3.215.215
124	10.3.215.216/29	10.3.215.217 – 10.3.215.222	10.3.215.223
125	10.3.215.224/29	10.3.215.225 – 10.3.215.230	10.3.215.231
126	10.3.215.232/29	10.3.215.233 – 10.3.215.238	10.3.215.239
127	10.3.215.240/29	10.3.215.241 – 10.3.215.246	10.3.215.247
128	10.3.215.248/29	10.3.215.249 – 10.3.215.254	10.3.215.255

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 →