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)10.2.164.0/22

network10.2.164.0/22

broadcast10.2.167.255

first host10.2.164.1

last host10.2.167.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.164.0/22

address00001010.00000010.10100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10100100.00000000

broadcast00001010.00000010.10100111.11111111

green = network part, grey = host part

hex0x0a02a400

decimal167945216

reverse dns0.164.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.164.0/29	10.2.164.1 – 10.2.164.6	10.2.164.7
2	10.2.164.8/29	10.2.164.9 – 10.2.164.14	10.2.164.15
3	10.2.164.16/29	10.2.164.17 – 10.2.164.22	10.2.164.23
4	10.2.164.24/29	10.2.164.25 – 10.2.164.30	10.2.164.31
5	10.2.164.32/29	10.2.164.33 – 10.2.164.38	10.2.164.39
6	10.2.164.40/29	10.2.164.41 – 10.2.164.46	10.2.164.47
7	10.2.164.48/29	10.2.164.49 – 10.2.164.54	10.2.164.55
8	10.2.164.56/29	10.2.164.57 – 10.2.164.62	10.2.164.63
9	10.2.164.64/29	10.2.164.65 – 10.2.164.70	10.2.164.71
10	10.2.164.72/29	10.2.164.73 – 10.2.164.78	10.2.164.79
11	10.2.164.80/29	10.2.164.81 – 10.2.164.86	10.2.164.87
12	10.2.164.88/29	10.2.164.89 – 10.2.164.94	10.2.164.95
13	10.2.164.96/29	10.2.164.97 – 10.2.164.102	10.2.164.103
14	10.2.164.104/29	10.2.164.105 – 10.2.164.110	10.2.164.111
15	10.2.164.112/29	10.2.164.113 – 10.2.164.118	10.2.164.119
16	10.2.164.120/29	10.2.164.121 – 10.2.164.126	10.2.164.127
17	10.2.164.128/29	10.2.164.129 – 10.2.164.134	10.2.164.135
18	10.2.164.136/29	10.2.164.137 – 10.2.164.142	10.2.164.143
19	10.2.164.144/29	10.2.164.145 – 10.2.164.150	10.2.164.151
20	10.2.164.152/29	10.2.164.153 – 10.2.164.158	10.2.164.159
21	10.2.164.160/29	10.2.164.161 – 10.2.164.166	10.2.164.167
22	10.2.164.168/29	10.2.164.169 – 10.2.164.174	10.2.164.175
23	10.2.164.176/29	10.2.164.177 – 10.2.164.182	10.2.164.183
24	10.2.164.184/29	10.2.164.185 – 10.2.164.190	10.2.164.191
25	10.2.164.192/29	10.2.164.193 – 10.2.164.198	10.2.164.199
26	10.2.164.200/29	10.2.164.201 – 10.2.164.206	10.2.164.207
27	10.2.164.208/29	10.2.164.209 – 10.2.164.214	10.2.164.215
28	10.2.164.216/29	10.2.164.217 – 10.2.164.222	10.2.164.223
29	10.2.164.224/29	10.2.164.225 – 10.2.164.230	10.2.164.231
30	10.2.164.232/29	10.2.164.233 – 10.2.164.238	10.2.164.239
31	10.2.164.240/29	10.2.164.241 – 10.2.164.246	10.2.164.247
32	10.2.164.248/29	10.2.164.249 – 10.2.164.254	10.2.164.255
33	10.2.165.0/29	10.2.165.1 – 10.2.165.6	10.2.165.7
34	10.2.165.8/29	10.2.165.9 – 10.2.165.14	10.2.165.15
35	10.2.165.16/29	10.2.165.17 – 10.2.165.22	10.2.165.23
36	10.2.165.24/29	10.2.165.25 – 10.2.165.30	10.2.165.31
37	10.2.165.32/29	10.2.165.33 – 10.2.165.38	10.2.165.39
38	10.2.165.40/29	10.2.165.41 – 10.2.165.46	10.2.165.47
39	10.2.165.48/29	10.2.165.49 – 10.2.165.54	10.2.165.55
40	10.2.165.56/29	10.2.165.57 – 10.2.165.62	10.2.165.63
41	10.2.165.64/29	10.2.165.65 – 10.2.165.70	10.2.165.71
42	10.2.165.72/29	10.2.165.73 – 10.2.165.78	10.2.165.79
43	10.2.165.80/29	10.2.165.81 – 10.2.165.86	10.2.165.87
44	10.2.165.88/29	10.2.165.89 – 10.2.165.94	10.2.165.95
45	10.2.165.96/29	10.2.165.97 – 10.2.165.102	10.2.165.103
46	10.2.165.104/29	10.2.165.105 – 10.2.165.110	10.2.165.111
47	10.2.165.112/29	10.2.165.113 – 10.2.165.118	10.2.165.119
48	10.2.165.120/29	10.2.165.121 – 10.2.165.126	10.2.165.127
49	10.2.165.128/29	10.2.165.129 – 10.2.165.134	10.2.165.135
50	10.2.165.136/29	10.2.165.137 – 10.2.165.142	10.2.165.143
51	10.2.165.144/29	10.2.165.145 – 10.2.165.150	10.2.165.151
52	10.2.165.152/29	10.2.165.153 – 10.2.165.158	10.2.165.159
53	10.2.165.160/29	10.2.165.161 – 10.2.165.166	10.2.165.167
54	10.2.165.168/29	10.2.165.169 – 10.2.165.174	10.2.165.175
55	10.2.165.176/29	10.2.165.177 – 10.2.165.182	10.2.165.183
56	10.2.165.184/29	10.2.165.185 – 10.2.165.190	10.2.165.191
57	10.2.165.192/29	10.2.165.193 – 10.2.165.198	10.2.165.199
58	10.2.165.200/29	10.2.165.201 – 10.2.165.206	10.2.165.207
59	10.2.165.208/29	10.2.165.209 – 10.2.165.214	10.2.165.215
60	10.2.165.216/29	10.2.165.217 – 10.2.165.222	10.2.165.223
61	10.2.165.224/29	10.2.165.225 – 10.2.165.230	10.2.165.231
62	10.2.165.232/29	10.2.165.233 – 10.2.165.238	10.2.165.239
63	10.2.165.240/29	10.2.165.241 – 10.2.165.246	10.2.165.247
64	10.2.165.248/29	10.2.165.249 – 10.2.165.254	10.2.165.255
65	10.2.166.0/29	10.2.166.1 – 10.2.166.6	10.2.166.7
66	10.2.166.8/29	10.2.166.9 – 10.2.166.14	10.2.166.15
67	10.2.166.16/29	10.2.166.17 – 10.2.166.22	10.2.166.23
68	10.2.166.24/29	10.2.166.25 – 10.2.166.30	10.2.166.31
69	10.2.166.32/29	10.2.166.33 – 10.2.166.38	10.2.166.39
70	10.2.166.40/29	10.2.166.41 – 10.2.166.46	10.2.166.47
71	10.2.166.48/29	10.2.166.49 – 10.2.166.54	10.2.166.55
72	10.2.166.56/29	10.2.166.57 – 10.2.166.62	10.2.166.63
73	10.2.166.64/29	10.2.166.65 – 10.2.166.70	10.2.166.71
74	10.2.166.72/29	10.2.166.73 – 10.2.166.78	10.2.166.79
75	10.2.166.80/29	10.2.166.81 – 10.2.166.86	10.2.166.87
76	10.2.166.88/29	10.2.166.89 – 10.2.166.94	10.2.166.95
77	10.2.166.96/29	10.2.166.97 – 10.2.166.102	10.2.166.103
78	10.2.166.104/29	10.2.166.105 – 10.2.166.110	10.2.166.111
79	10.2.166.112/29	10.2.166.113 – 10.2.166.118	10.2.166.119
80	10.2.166.120/29	10.2.166.121 – 10.2.166.126	10.2.166.127
81	10.2.166.128/29	10.2.166.129 – 10.2.166.134	10.2.166.135
82	10.2.166.136/29	10.2.166.137 – 10.2.166.142	10.2.166.143
83	10.2.166.144/29	10.2.166.145 – 10.2.166.150	10.2.166.151
84	10.2.166.152/29	10.2.166.153 – 10.2.166.158	10.2.166.159
85	10.2.166.160/29	10.2.166.161 – 10.2.166.166	10.2.166.167
86	10.2.166.168/29	10.2.166.169 – 10.2.166.174	10.2.166.175
87	10.2.166.176/29	10.2.166.177 – 10.2.166.182	10.2.166.183
88	10.2.166.184/29	10.2.166.185 – 10.2.166.190	10.2.166.191
89	10.2.166.192/29	10.2.166.193 – 10.2.166.198	10.2.166.199
90	10.2.166.200/29	10.2.166.201 – 10.2.166.206	10.2.166.207
91	10.2.166.208/29	10.2.166.209 – 10.2.166.214	10.2.166.215
92	10.2.166.216/29	10.2.166.217 – 10.2.166.222	10.2.166.223
93	10.2.166.224/29	10.2.166.225 – 10.2.166.230	10.2.166.231
94	10.2.166.232/29	10.2.166.233 – 10.2.166.238	10.2.166.239
95	10.2.166.240/29	10.2.166.241 – 10.2.166.246	10.2.166.247
96	10.2.166.248/29	10.2.166.249 – 10.2.166.254	10.2.166.255
97	10.2.167.0/29	10.2.167.1 – 10.2.167.6	10.2.167.7
98	10.2.167.8/29	10.2.167.9 – 10.2.167.14	10.2.167.15
99	10.2.167.16/29	10.2.167.17 – 10.2.167.22	10.2.167.23
100	10.2.167.24/29	10.2.167.25 – 10.2.167.30	10.2.167.31
101	10.2.167.32/29	10.2.167.33 – 10.2.167.38	10.2.167.39
102	10.2.167.40/29	10.2.167.41 – 10.2.167.46	10.2.167.47
103	10.2.167.48/29	10.2.167.49 – 10.2.167.54	10.2.167.55
104	10.2.167.56/29	10.2.167.57 – 10.2.167.62	10.2.167.63
105	10.2.167.64/29	10.2.167.65 – 10.2.167.70	10.2.167.71
106	10.2.167.72/29	10.2.167.73 – 10.2.167.78	10.2.167.79
107	10.2.167.80/29	10.2.167.81 – 10.2.167.86	10.2.167.87
108	10.2.167.88/29	10.2.167.89 – 10.2.167.94	10.2.167.95
109	10.2.167.96/29	10.2.167.97 – 10.2.167.102	10.2.167.103
110	10.2.167.104/29	10.2.167.105 – 10.2.167.110	10.2.167.111
111	10.2.167.112/29	10.2.167.113 – 10.2.167.118	10.2.167.119
112	10.2.167.120/29	10.2.167.121 – 10.2.167.126	10.2.167.127
113	10.2.167.128/29	10.2.167.129 – 10.2.167.134	10.2.167.135
114	10.2.167.136/29	10.2.167.137 – 10.2.167.142	10.2.167.143
115	10.2.167.144/29	10.2.167.145 – 10.2.167.150	10.2.167.151
116	10.2.167.152/29	10.2.167.153 – 10.2.167.158	10.2.167.159
117	10.2.167.160/29	10.2.167.161 – 10.2.167.166	10.2.167.167
118	10.2.167.168/29	10.2.167.169 – 10.2.167.174	10.2.167.175
119	10.2.167.176/29	10.2.167.177 – 10.2.167.182	10.2.167.183
120	10.2.167.184/29	10.2.167.185 – 10.2.167.190	10.2.167.191
121	10.2.167.192/29	10.2.167.193 – 10.2.167.198	10.2.167.199
122	10.2.167.200/29	10.2.167.201 – 10.2.167.206	10.2.167.207
123	10.2.167.208/29	10.2.167.209 – 10.2.167.214	10.2.167.215
124	10.2.167.216/29	10.2.167.217 – 10.2.167.222	10.2.167.223
125	10.2.167.224/29	10.2.167.225 – 10.2.167.230	10.2.167.231
126	10.2.167.232/29	10.2.167.233 – 10.2.167.238	10.2.167.239
127	10.2.167.240/29	10.2.167.241 – 10.2.167.246	10.2.167.247
128	10.2.167.248/29	10.2.167.249 – 10.2.167.254	10.2.167.255

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 →