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)10.2.228.0/22

network10.2.228.0/22

broadcast10.2.231.255

first host10.2.228.1

last host10.2.231.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.228.0/22

address00001010.00000010.11100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.11100100.00000000

broadcast00001010.00000010.11100111.11111111

green = network part, grey = host part

hex0x0a02e400

decimal167961600

reverse dns0.228.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:e400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.228.0/29	10.2.228.1 – 10.2.228.6	10.2.228.7
2	10.2.228.8/29	10.2.228.9 – 10.2.228.14	10.2.228.15
3	10.2.228.16/29	10.2.228.17 – 10.2.228.22	10.2.228.23
4	10.2.228.24/29	10.2.228.25 – 10.2.228.30	10.2.228.31
5	10.2.228.32/29	10.2.228.33 – 10.2.228.38	10.2.228.39
6	10.2.228.40/29	10.2.228.41 – 10.2.228.46	10.2.228.47
7	10.2.228.48/29	10.2.228.49 – 10.2.228.54	10.2.228.55
8	10.2.228.56/29	10.2.228.57 – 10.2.228.62	10.2.228.63
9	10.2.228.64/29	10.2.228.65 – 10.2.228.70	10.2.228.71
10	10.2.228.72/29	10.2.228.73 – 10.2.228.78	10.2.228.79
11	10.2.228.80/29	10.2.228.81 – 10.2.228.86	10.2.228.87
12	10.2.228.88/29	10.2.228.89 – 10.2.228.94	10.2.228.95
13	10.2.228.96/29	10.2.228.97 – 10.2.228.102	10.2.228.103
14	10.2.228.104/29	10.2.228.105 – 10.2.228.110	10.2.228.111
15	10.2.228.112/29	10.2.228.113 – 10.2.228.118	10.2.228.119
16	10.2.228.120/29	10.2.228.121 – 10.2.228.126	10.2.228.127
17	10.2.228.128/29	10.2.228.129 – 10.2.228.134	10.2.228.135
18	10.2.228.136/29	10.2.228.137 – 10.2.228.142	10.2.228.143
19	10.2.228.144/29	10.2.228.145 – 10.2.228.150	10.2.228.151
20	10.2.228.152/29	10.2.228.153 – 10.2.228.158	10.2.228.159
21	10.2.228.160/29	10.2.228.161 – 10.2.228.166	10.2.228.167
22	10.2.228.168/29	10.2.228.169 – 10.2.228.174	10.2.228.175
23	10.2.228.176/29	10.2.228.177 – 10.2.228.182	10.2.228.183
24	10.2.228.184/29	10.2.228.185 – 10.2.228.190	10.2.228.191
25	10.2.228.192/29	10.2.228.193 – 10.2.228.198	10.2.228.199
26	10.2.228.200/29	10.2.228.201 – 10.2.228.206	10.2.228.207
27	10.2.228.208/29	10.2.228.209 – 10.2.228.214	10.2.228.215
28	10.2.228.216/29	10.2.228.217 – 10.2.228.222	10.2.228.223
29	10.2.228.224/29	10.2.228.225 – 10.2.228.230	10.2.228.231
30	10.2.228.232/29	10.2.228.233 – 10.2.228.238	10.2.228.239
31	10.2.228.240/29	10.2.228.241 – 10.2.228.246	10.2.228.247
32	10.2.228.248/29	10.2.228.249 – 10.2.228.254	10.2.228.255
33	10.2.229.0/29	10.2.229.1 – 10.2.229.6	10.2.229.7
34	10.2.229.8/29	10.2.229.9 – 10.2.229.14	10.2.229.15
35	10.2.229.16/29	10.2.229.17 – 10.2.229.22	10.2.229.23
36	10.2.229.24/29	10.2.229.25 – 10.2.229.30	10.2.229.31
37	10.2.229.32/29	10.2.229.33 – 10.2.229.38	10.2.229.39
38	10.2.229.40/29	10.2.229.41 – 10.2.229.46	10.2.229.47
39	10.2.229.48/29	10.2.229.49 – 10.2.229.54	10.2.229.55
40	10.2.229.56/29	10.2.229.57 – 10.2.229.62	10.2.229.63
41	10.2.229.64/29	10.2.229.65 – 10.2.229.70	10.2.229.71
42	10.2.229.72/29	10.2.229.73 – 10.2.229.78	10.2.229.79
43	10.2.229.80/29	10.2.229.81 – 10.2.229.86	10.2.229.87
44	10.2.229.88/29	10.2.229.89 – 10.2.229.94	10.2.229.95
45	10.2.229.96/29	10.2.229.97 – 10.2.229.102	10.2.229.103
46	10.2.229.104/29	10.2.229.105 – 10.2.229.110	10.2.229.111
47	10.2.229.112/29	10.2.229.113 – 10.2.229.118	10.2.229.119
48	10.2.229.120/29	10.2.229.121 – 10.2.229.126	10.2.229.127
49	10.2.229.128/29	10.2.229.129 – 10.2.229.134	10.2.229.135
50	10.2.229.136/29	10.2.229.137 – 10.2.229.142	10.2.229.143
51	10.2.229.144/29	10.2.229.145 – 10.2.229.150	10.2.229.151
52	10.2.229.152/29	10.2.229.153 – 10.2.229.158	10.2.229.159
53	10.2.229.160/29	10.2.229.161 – 10.2.229.166	10.2.229.167
54	10.2.229.168/29	10.2.229.169 – 10.2.229.174	10.2.229.175
55	10.2.229.176/29	10.2.229.177 – 10.2.229.182	10.2.229.183
56	10.2.229.184/29	10.2.229.185 – 10.2.229.190	10.2.229.191
57	10.2.229.192/29	10.2.229.193 – 10.2.229.198	10.2.229.199
58	10.2.229.200/29	10.2.229.201 – 10.2.229.206	10.2.229.207
59	10.2.229.208/29	10.2.229.209 – 10.2.229.214	10.2.229.215
60	10.2.229.216/29	10.2.229.217 – 10.2.229.222	10.2.229.223
61	10.2.229.224/29	10.2.229.225 – 10.2.229.230	10.2.229.231
62	10.2.229.232/29	10.2.229.233 – 10.2.229.238	10.2.229.239
63	10.2.229.240/29	10.2.229.241 – 10.2.229.246	10.2.229.247
64	10.2.229.248/29	10.2.229.249 – 10.2.229.254	10.2.229.255
65	10.2.230.0/29	10.2.230.1 – 10.2.230.6	10.2.230.7
66	10.2.230.8/29	10.2.230.9 – 10.2.230.14	10.2.230.15
67	10.2.230.16/29	10.2.230.17 – 10.2.230.22	10.2.230.23
68	10.2.230.24/29	10.2.230.25 – 10.2.230.30	10.2.230.31
69	10.2.230.32/29	10.2.230.33 – 10.2.230.38	10.2.230.39
70	10.2.230.40/29	10.2.230.41 – 10.2.230.46	10.2.230.47
71	10.2.230.48/29	10.2.230.49 – 10.2.230.54	10.2.230.55
72	10.2.230.56/29	10.2.230.57 – 10.2.230.62	10.2.230.63
73	10.2.230.64/29	10.2.230.65 – 10.2.230.70	10.2.230.71
74	10.2.230.72/29	10.2.230.73 – 10.2.230.78	10.2.230.79
75	10.2.230.80/29	10.2.230.81 – 10.2.230.86	10.2.230.87
76	10.2.230.88/29	10.2.230.89 – 10.2.230.94	10.2.230.95
77	10.2.230.96/29	10.2.230.97 – 10.2.230.102	10.2.230.103
78	10.2.230.104/29	10.2.230.105 – 10.2.230.110	10.2.230.111
79	10.2.230.112/29	10.2.230.113 – 10.2.230.118	10.2.230.119
80	10.2.230.120/29	10.2.230.121 – 10.2.230.126	10.2.230.127
81	10.2.230.128/29	10.2.230.129 – 10.2.230.134	10.2.230.135
82	10.2.230.136/29	10.2.230.137 – 10.2.230.142	10.2.230.143
83	10.2.230.144/29	10.2.230.145 – 10.2.230.150	10.2.230.151
84	10.2.230.152/29	10.2.230.153 – 10.2.230.158	10.2.230.159
85	10.2.230.160/29	10.2.230.161 – 10.2.230.166	10.2.230.167
86	10.2.230.168/29	10.2.230.169 – 10.2.230.174	10.2.230.175
87	10.2.230.176/29	10.2.230.177 – 10.2.230.182	10.2.230.183
88	10.2.230.184/29	10.2.230.185 – 10.2.230.190	10.2.230.191
89	10.2.230.192/29	10.2.230.193 – 10.2.230.198	10.2.230.199
90	10.2.230.200/29	10.2.230.201 – 10.2.230.206	10.2.230.207
91	10.2.230.208/29	10.2.230.209 – 10.2.230.214	10.2.230.215
92	10.2.230.216/29	10.2.230.217 – 10.2.230.222	10.2.230.223
93	10.2.230.224/29	10.2.230.225 – 10.2.230.230	10.2.230.231
94	10.2.230.232/29	10.2.230.233 – 10.2.230.238	10.2.230.239
95	10.2.230.240/29	10.2.230.241 – 10.2.230.246	10.2.230.247
96	10.2.230.248/29	10.2.230.249 – 10.2.230.254	10.2.230.255
97	10.2.231.0/29	10.2.231.1 – 10.2.231.6	10.2.231.7
98	10.2.231.8/29	10.2.231.9 – 10.2.231.14	10.2.231.15
99	10.2.231.16/29	10.2.231.17 – 10.2.231.22	10.2.231.23
100	10.2.231.24/29	10.2.231.25 – 10.2.231.30	10.2.231.31
101	10.2.231.32/29	10.2.231.33 – 10.2.231.38	10.2.231.39
102	10.2.231.40/29	10.2.231.41 – 10.2.231.46	10.2.231.47
103	10.2.231.48/29	10.2.231.49 – 10.2.231.54	10.2.231.55
104	10.2.231.56/29	10.2.231.57 – 10.2.231.62	10.2.231.63
105	10.2.231.64/29	10.2.231.65 – 10.2.231.70	10.2.231.71
106	10.2.231.72/29	10.2.231.73 – 10.2.231.78	10.2.231.79
107	10.2.231.80/29	10.2.231.81 – 10.2.231.86	10.2.231.87
108	10.2.231.88/29	10.2.231.89 – 10.2.231.94	10.2.231.95
109	10.2.231.96/29	10.2.231.97 – 10.2.231.102	10.2.231.103
110	10.2.231.104/29	10.2.231.105 – 10.2.231.110	10.2.231.111
111	10.2.231.112/29	10.2.231.113 – 10.2.231.118	10.2.231.119
112	10.2.231.120/29	10.2.231.121 – 10.2.231.126	10.2.231.127
113	10.2.231.128/29	10.2.231.129 – 10.2.231.134	10.2.231.135
114	10.2.231.136/29	10.2.231.137 – 10.2.231.142	10.2.231.143
115	10.2.231.144/29	10.2.231.145 – 10.2.231.150	10.2.231.151
116	10.2.231.152/29	10.2.231.153 – 10.2.231.158	10.2.231.159
117	10.2.231.160/29	10.2.231.161 – 10.2.231.166	10.2.231.167
118	10.2.231.168/29	10.2.231.169 – 10.2.231.174	10.2.231.175
119	10.2.231.176/29	10.2.231.177 – 10.2.231.182	10.2.231.183
120	10.2.231.184/29	10.2.231.185 – 10.2.231.190	10.2.231.191
121	10.2.231.192/29	10.2.231.193 – 10.2.231.198	10.2.231.199
122	10.2.231.200/29	10.2.231.201 – 10.2.231.206	10.2.231.207
123	10.2.231.208/29	10.2.231.209 – 10.2.231.214	10.2.231.215
124	10.2.231.216/29	10.2.231.217 – 10.2.231.222	10.2.231.223
125	10.2.231.224/29	10.2.231.225 – 10.2.231.230	10.2.231.231
126	10.2.231.232/29	10.2.231.233 – 10.2.231.238	10.2.231.239
127	10.2.231.240/29	10.2.231.241 – 10.2.231.246	10.2.231.247
128	10.2.231.248/29	10.2.231.249 – 10.2.231.254	10.2.231.255

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 →