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)10.2.216.0/22

network10.2.216.0/22

broadcast10.2.219.255

first host10.2.216.1

last host10.2.219.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.216.0/22

address00001010.00000010.11011000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.11011000.00000000

broadcast00001010.00000010.11011011.11111111

green = network part, grey = host part

hex0x0a02d800

decimal167958528

reverse dns0.216.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:d800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.216.0/29	10.2.216.1 – 10.2.216.6	10.2.216.7
2	10.2.216.8/29	10.2.216.9 – 10.2.216.14	10.2.216.15
3	10.2.216.16/29	10.2.216.17 – 10.2.216.22	10.2.216.23
4	10.2.216.24/29	10.2.216.25 – 10.2.216.30	10.2.216.31
5	10.2.216.32/29	10.2.216.33 – 10.2.216.38	10.2.216.39
6	10.2.216.40/29	10.2.216.41 – 10.2.216.46	10.2.216.47
7	10.2.216.48/29	10.2.216.49 – 10.2.216.54	10.2.216.55
8	10.2.216.56/29	10.2.216.57 – 10.2.216.62	10.2.216.63
9	10.2.216.64/29	10.2.216.65 – 10.2.216.70	10.2.216.71
10	10.2.216.72/29	10.2.216.73 – 10.2.216.78	10.2.216.79
11	10.2.216.80/29	10.2.216.81 – 10.2.216.86	10.2.216.87
12	10.2.216.88/29	10.2.216.89 – 10.2.216.94	10.2.216.95
13	10.2.216.96/29	10.2.216.97 – 10.2.216.102	10.2.216.103
14	10.2.216.104/29	10.2.216.105 – 10.2.216.110	10.2.216.111
15	10.2.216.112/29	10.2.216.113 – 10.2.216.118	10.2.216.119
16	10.2.216.120/29	10.2.216.121 – 10.2.216.126	10.2.216.127
17	10.2.216.128/29	10.2.216.129 – 10.2.216.134	10.2.216.135
18	10.2.216.136/29	10.2.216.137 – 10.2.216.142	10.2.216.143
19	10.2.216.144/29	10.2.216.145 – 10.2.216.150	10.2.216.151
20	10.2.216.152/29	10.2.216.153 – 10.2.216.158	10.2.216.159
21	10.2.216.160/29	10.2.216.161 – 10.2.216.166	10.2.216.167
22	10.2.216.168/29	10.2.216.169 – 10.2.216.174	10.2.216.175
23	10.2.216.176/29	10.2.216.177 – 10.2.216.182	10.2.216.183
24	10.2.216.184/29	10.2.216.185 – 10.2.216.190	10.2.216.191
25	10.2.216.192/29	10.2.216.193 – 10.2.216.198	10.2.216.199
26	10.2.216.200/29	10.2.216.201 – 10.2.216.206	10.2.216.207
27	10.2.216.208/29	10.2.216.209 – 10.2.216.214	10.2.216.215
28	10.2.216.216/29	10.2.216.217 – 10.2.216.222	10.2.216.223
29	10.2.216.224/29	10.2.216.225 – 10.2.216.230	10.2.216.231
30	10.2.216.232/29	10.2.216.233 – 10.2.216.238	10.2.216.239
31	10.2.216.240/29	10.2.216.241 – 10.2.216.246	10.2.216.247
32	10.2.216.248/29	10.2.216.249 – 10.2.216.254	10.2.216.255
33	10.2.217.0/29	10.2.217.1 – 10.2.217.6	10.2.217.7
34	10.2.217.8/29	10.2.217.9 – 10.2.217.14	10.2.217.15
35	10.2.217.16/29	10.2.217.17 – 10.2.217.22	10.2.217.23
36	10.2.217.24/29	10.2.217.25 – 10.2.217.30	10.2.217.31
37	10.2.217.32/29	10.2.217.33 – 10.2.217.38	10.2.217.39
38	10.2.217.40/29	10.2.217.41 – 10.2.217.46	10.2.217.47
39	10.2.217.48/29	10.2.217.49 – 10.2.217.54	10.2.217.55
40	10.2.217.56/29	10.2.217.57 – 10.2.217.62	10.2.217.63
41	10.2.217.64/29	10.2.217.65 – 10.2.217.70	10.2.217.71
42	10.2.217.72/29	10.2.217.73 – 10.2.217.78	10.2.217.79
43	10.2.217.80/29	10.2.217.81 – 10.2.217.86	10.2.217.87
44	10.2.217.88/29	10.2.217.89 – 10.2.217.94	10.2.217.95
45	10.2.217.96/29	10.2.217.97 – 10.2.217.102	10.2.217.103
46	10.2.217.104/29	10.2.217.105 – 10.2.217.110	10.2.217.111
47	10.2.217.112/29	10.2.217.113 – 10.2.217.118	10.2.217.119
48	10.2.217.120/29	10.2.217.121 – 10.2.217.126	10.2.217.127
49	10.2.217.128/29	10.2.217.129 – 10.2.217.134	10.2.217.135
50	10.2.217.136/29	10.2.217.137 – 10.2.217.142	10.2.217.143
51	10.2.217.144/29	10.2.217.145 – 10.2.217.150	10.2.217.151
52	10.2.217.152/29	10.2.217.153 – 10.2.217.158	10.2.217.159
53	10.2.217.160/29	10.2.217.161 – 10.2.217.166	10.2.217.167
54	10.2.217.168/29	10.2.217.169 – 10.2.217.174	10.2.217.175
55	10.2.217.176/29	10.2.217.177 – 10.2.217.182	10.2.217.183
56	10.2.217.184/29	10.2.217.185 – 10.2.217.190	10.2.217.191
57	10.2.217.192/29	10.2.217.193 – 10.2.217.198	10.2.217.199
58	10.2.217.200/29	10.2.217.201 – 10.2.217.206	10.2.217.207
59	10.2.217.208/29	10.2.217.209 – 10.2.217.214	10.2.217.215
60	10.2.217.216/29	10.2.217.217 – 10.2.217.222	10.2.217.223
61	10.2.217.224/29	10.2.217.225 – 10.2.217.230	10.2.217.231
62	10.2.217.232/29	10.2.217.233 – 10.2.217.238	10.2.217.239
63	10.2.217.240/29	10.2.217.241 – 10.2.217.246	10.2.217.247
64	10.2.217.248/29	10.2.217.249 – 10.2.217.254	10.2.217.255
65	10.2.218.0/29	10.2.218.1 – 10.2.218.6	10.2.218.7
66	10.2.218.8/29	10.2.218.9 – 10.2.218.14	10.2.218.15
67	10.2.218.16/29	10.2.218.17 – 10.2.218.22	10.2.218.23
68	10.2.218.24/29	10.2.218.25 – 10.2.218.30	10.2.218.31
69	10.2.218.32/29	10.2.218.33 – 10.2.218.38	10.2.218.39
70	10.2.218.40/29	10.2.218.41 – 10.2.218.46	10.2.218.47
71	10.2.218.48/29	10.2.218.49 – 10.2.218.54	10.2.218.55
72	10.2.218.56/29	10.2.218.57 – 10.2.218.62	10.2.218.63
73	10.2.218.64/29	10.2.218.65 – 10.2.218.70	10.2.218.71
74	10.2.218.72/29	10.2.218.73 – 10.2.218.78	10.2.218.79
75	10.2.218.80/29	10.2.218.81 – 10.2.218.86	10.2.218.87
76	10.2.218.88/29	10.2.218.89 – 10.2.218.94	10.2.218.95
77	10.2.218.96/29	10.2.218.97 – 10.2.218.102	10.2.218.103
78	10.2.218.104/29	10.2.218.105 – 10.2.218.110	10.2.218.111
79	10.2.218.112/29	10.2.218.113 – 10.2.218.118	10.2.218.119
80	10.2.218.120/29	10.2.218.121 – 10.2.218.126	10.2.218.127
81	10.2.218.128/29	10.2.218.129 – 10.2.218.134	10.2.218.135
82	10.2.218.136/29	10.2.218.137 – 10.2.218.142	10.2.218.143
83	10.2.218.144/29	10.2.218.145 – 10.2.218.150	10.2.218.151
84	10.2.218.152/29	10.2.218.153 – 10.2.218.158	10.2.218.159
85	10.2.218.160/29	10.2.218.161 – 10.2.218.166	10.2.218.167
86	10.2.218.168/29	10.2.218.169 – 10.2.218.174	10.2.218.175
87	10.2.218.176/29	10.2.218.177 – 10.2.218.182	10.2.218.183
88	10.2.218.184/29	10.2.218.185 – 10.2.218.190	10.2.218.191
89	10.2.218.192/29	10.2.218.193 – 10.2.218.198	10.2.218.199
90	10.2.218.200/29	10.2.218.201 – 10.2.218.206	10.2.218.207
91	10.2.218.208/29	10.2.218.209 – 10.2.218.214	10.2.218.215
92	10.2.218.216/29	10.2.218.217 – 10.2.218.222	10.2.218.223
93	10.2.218.224/29	10.2.218.225 – 10.2.218.230	10.2.218.231
94	10.2.218.232/29	10.2.218.233 – 10.2.218.238	10.2.218.239
95	10.2.218.240/29	10.2.218.241 – 10.2.218.246	10.2.218.247
96	10.2.218.248/29	10.2.218.249 – 10.2.218.254	10.2.218.255
97	10.2.219.0/29	10.2.219.1 – 10.2.219.6	10.2.219.7
98	10.2.219.8/29	10.2.219.9 – 10.2.219.14	10.2.219.15
99	10.2.219.16/29	10.2.219.17 – 10.2.219.22	10.2.219.23
100	10.2.219.24/29	10.2.219.25 – 10.2.219.30	10.2.219.31
101	10.2.219.32/29	10.2.219.33 – 10.2.219.38	10.2.219.39
102	10.2.219.40/29	10.2.219.41 – 10.2.219.46	10.2.219.47
103	10.2.219.48/29	10.2.219.49 – 10.2.219.54	10.2.219.55
104	10.2.219.56/29	10.2.219.57 – 10.2.219.62	10.2.219.63
105	10.2.219.64/29	10.2.219.65 – 10.2.219.70	10.2.219.71
106	10.2.219.72/29	10.2.219.73 – 10.2.219.78	10.2.219.79
107	10.2.219.80/29	10.2.219.81 – 10.2.219.86	10.2.219.87
108	10.2.219.88/29	10.2.219.89 – 10.2.219.94	10.2.219.95
109	10.2.219.96/29	10.2.219.97 – 10.2.219.102	10.2.219.103
110	10.2.219.104/29	10.2.219.105 – 10.2.219.110	10.2.219.111
111	10.2.219.112/29	10.2.219.113 – 10.2.219.118	10.2.219.119
112	10.2.219.120/29	10.2.219.121 – 10.2.219.126	10.2.219.127
113	10.2.219.128/29	10.2.219.129 – 10.2.219.134	10.2.219.135
114	10.2.219.136/29	10.2.219.137 – 10.2.219.142	10.2.219.143
115	10.2.219.144/29	10.2.219.145 – 10.2.219.150	10.2.219.151
116	10.2.219.152/29	10.2.219.153 – 10.2.219.158	10.2.219.159
117	10.2.219.160/29	10.2.219.161 – 10.2.219.166	10.2.219.167
118	10.2.219.168/29	10.2.219.169 – 10.2.219.174	10.2.219.175
119	10.2.219.176/29	10.2.219.177 – 10.2.219.182	10.2.219.183
120	10.2.219.184/29	10.2.219.185 – 10.2.219.190	10.2.219.191
121	10.2.219.192/29	10.2.219.193 – 10.2.219.198	10.2.219.199
122	10.2.219.200/29	10.2.219.201 – 10.2.219.206	10.2.219.207
123	10.2.219.208/29	10.2.219.209 – 10.2.219.214	10.2.219.215
124	10.2.219.216/29	10.2.219.217 – 10.2.219.222	10.2.219.223
125	10.2.219.224/29	10.2.219.225 – 10.2.219.230	10.2.219.231
126	10.2.219.232/29	10.2.219.233 – 10.2.219.238	10.2.219.239
127	10.2.219.240/29	10.2.219.241 – 10.2.219.246	10.2.219.247
128	10.2.219.248/29	10.2.219.249 – 10.2.219.254	10.2.219.255

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 →