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)10.2.156.0/22

network10.2.156.0/22

broadcast10.2.159.255

first host10.2.156.1

last host10.2.159.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.156.0/22

address00001010.00000010.10011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10011100.00000000

broadcast00001010.00000010.10011111.11111111

green = network part, grey = host part

hex0x0a029c00

decimal167943168

reverse dns0.156.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9c00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.156.0/29	10.2.156.1 – 10.2.156.6	10.2.156.7
2	10.2.156.8/29	10.2.156.9 – 10.2.156.14	10.2.156.15
3	10.2.156.16/29	10.2.156.17 – 10.2.156.22	10.2.156.23
4	10.2.156.24/29	10.2.156.25 – 10.2.156.30	10.2.156.31
5	10.2.156.32/29	10.2.156.33 – 10.2.156.38	10.2.156.39
6	10.2.156.40/29	10.2.156.41 – 10.2.156.46	10.2.156.47
7	10.2.156.48/29	10.2.156.49 – 10.2.156.54	10.2.156.55
8	10.2.156.56/29	10.2.156.57 – 10.2.156.62	10.2.156.63
9	10.2.156.64/29	10.2.156.65 – 10.2.156.70	10.2.156.71
10	10.2.156.72/29	10.2.156.73 – 10.2.156.78	10.2.156.79
11	10.2.156.80/29	10.2.156.81 – 10.2.156.86	10.2.156.87
12	10.2.156.88/29	10.2.156.89 – 10.2.156.94	10.2.156.95
13	10.2.156.96/29	10.2.156.97 – 10.2.156.102	10.2.156.103
14	10.2.156.104/29	10.2.156.105 – 10.2.156.110	10.2.156.111
15	10.2.156.112/29	10.2.156.113 – 10.2.156.118	10.2.156.119
16	10.2.156.120/29	10.2.156.121 – 10.2.156.126	10.2.156.127
17	10.2.156.128/29	10.2.156.129 – 10.2.156.134	10.2.156.135
18	10.2.156.136/29	10.2.156.137 – 10.2.156.142	10.2.156.143
19	10.2.156.144/29	10.2.156.145 – 10.2.156.150	10.2.156.151
20	10.2.156.152/29	10.2.156.153 – 10.2.156.158	10.2.156.159
21	10.2.156.160/29	10.2.156.161 – 10.2.156.166	10.2.156.167
22	10.2.156.168/29	10.2.156.169 – 10.2.156.174	10.2.156.175
23	10.2.156.176/29	10.2.156.177 – 10.2.156.182	10.2.156.183
24	10.2.156.184/29	10.2.156.185 – 10.2.156.190	10.2.156.191
25	10.2.156.192/29	10.2.156.193 – 10.2.156.198	10.2.156.199
26	10.2.156.200/29	10.2.156.201 – 10.2.156.206	10.2.156.207
27	10.2.156.208/29	10.2.156.209 – 10.2.156.214	10.2.156.215
28	10.2.156.216/29	10.2.156.217 – 10.2.156.222	10.2.156.223
29	10.2.156.224/29	10.2.156.225 – 10.2.156.230	10.2.156.231
30	10.2.156.232/29	10.2.156.233 – 10.2.156.238	10.2.156.239
31	10.2.156.240/29	10.2.156.241 – 10.2.156.246	10.2.156.247
32	10.2.156.248/29	10.2.156.249 – 10.2.156.254	10.2.156.255
33	10.2.157.0/29	10.2.157.1 – 10.2.157.6	10.2.157.7
34	10.2.157.8/29	10.2.157.9 – 10.2.157.14	10.2.157.15
35	10.2.157.16/29	10.2.157.17 – 10.2.157.22	10.2.157.23
36	10.2.157.24/29	10.2.157.25 – 10.2.157.30	10.2.157.31
37	10.2.157.32/29	10.2.157.33 – 10.2.157.38	10.2.157.39
38	10.2.157.40/29	10.2.157.41 – 10.2.157.46	10.2.157.47
39	10.2.157.48/29	10.2.157.49 – 10.2.157.54	10.2.157.55
40	10.2.157.56/29	10.2.157.57 – 10.2.157.62	10.2.157.63
41	10.2.157.64/29	10.2.157.65 – 10.2.157.70	10.2.157.71
42	10.2.157.72/29	10.2.157.73 – 10.2.157.78	10.2.157.79
43	10.2.157.80/29	10.2.157.81 – 10.2.157.86	10.2.157.87
44	10.2.157.88/29	10.2.157.89 – 10.2.157.94	10.2.157.95
45	10.2.157.96/29	10.2.157.97 – 10.2.157.102	10.2.157.103
46	10.2.157.104/29	10.2.157.105 – 10.2.157.110	10.2.157.111
47	10.2.157.112/29	10.2.157.113 – 10.2.157.118	10.2.157.119
48	10.2.157.120/29	10.2.157.121 – 10.2.157.126	10.2.157.127
49	10.2.157.128/29	10.2.157.129 – 10.2.157.134	10.2.157.135
50	10.2.157.136/29	10.2.157.137 – 10.2.157.142	10.2.157.143
51	10.2.157.144/29	10.2.157.145 – 10.2.157.150	10.2.157.151
52	10.2.157.152/29	10.2.157.153 – 10.2.157.158	10.2.157.159
53	10.2.157.160/29	10.2.157.161 – 10.2.157.166	10.2.157.167
54	10.2.157.168/29	10.2.157.169 – 10.2.157.174	10.2.157.175
55	10.2.157.176/29	10.2.157.177 – 10.2.157.182	10.2.157.183
56	10.2.157.184/29	10.2.157.185 – 10.2.157.190	10.2.157.191
57	10.2.157.192/29	10.2.157.193 – 10.2.157.198	10.2.157.199
58	10.2.157.200/29	10.2.157.201 – 10.2.157.206	10.2.157.207
59	10.2.157.208/29	10.2.157.209 – 10.2.157.214	10.2.157.215
60	10.2.157.216/29	10.2.157.217 – 10.2.157.222	10.2.157.223
61	10.2.157.224/29	10.2.157.225 – 10.2.157.230	10.2.157.231
62	10.2.157.232/29	10.2.157.233 – 10.2.157.238	10.2.157.239
63	10.2.157.240/29	10.2.157.241 – 10.2.157.246	10.2.157.247
64	10.2.157.248/29	10.2.157.249 – 10.2.157.254	10.2.157.255
65	10.2.158.0/29	10.2.158.1 – 10.2.158.6	10.2.158.7
66	10.2.158.8/29	10.2.158.9 – 10.2.158.14	10.2.158.15
67	10.2.158.16/29	10.2.158.17 – 10.2.158.22	10.2.158.23
68	10.2.158.24/29	10.2.158.25 – 10.2.158.30	10.2.158.31
69	10.2.158.32/29	10.2.158.33 – 10.2.158.38	10.2.158.39
70	10.2.158.40/29	10.2.158.41 – 10.2.158.46	10.2.158.47
71	10.2.158.48/29	10.2.158.49 – 10.2.158.54	10.2.158.55
72	10.2.158.56/29	10.2.158.57 – 10.2.158.62	10.2.158.63
73	10.2.158.64/29	10.2.158.65 – 10.2.158.70	10.2.158.71
74	10.2.158.72/29	10.2.158.73 – 10.2.158.78	10.2.158.79
75	10.2.158.80/29	10.2.158.81 – 10.2.158.86	10.2.158.87
76	10.2.158.88/29	10.2.158.89 – 10.2.158.94	10.2.158.95
77	10.2.158.96/29	10.2.158.97 – 10.2.158.102	10.2.158.103
78	10.2.158.104/29	10.2.158.105 – 10.2.158.110	10.2.158.111
79	10.2.158.112/29	10.2.158.113 – 10.2.158.118	10.2.158.119
80	10.2.158.120/29	10.2.158.121 – 10.2.158.126	10.2.158.127
81	10.2.158.128/29	10.2.158.129 – 10.2.158.134	10.2.158.135
82	10.2.158.136/29	10.2.158.137 – 10.2.158.142	10.2.158.143
83	10.2.158.144/29	10.2.158.145 – 10.2.158.150	10.2.158.151
84	10.2.158.152/29	10.2.158.153 – 10.2.158.158	10.2.158.159
85	10.2.158.160/29	10.2.158.161 – 10.2.158.166	10.2.158.167
86	10.2.158.168/29	10.2.158.169 – 10.2.158.174	10.2.158.175
87	10.2.158.176/29	10.2.158.177 – 10.2.158.182	10.2.158.183
88	10.2.158.184/29	10.2.158.185 – 10.2.158.190	10.2.158.191
89	10.2.158.192/29	10.2.158.193 – 10.2.158.198	10.2.158.199
90	10.2.158.200/29	10.2.158.201 – 10.2.158.206	10.2.158.207
91	10.2.158.208/29	10.2.158.209 – 10.2.158.214	10.2.158.215
92	10.2.158.216/29	10.2.158.217 – 10.2.158.222	10.2.158.223
93	10.2.158.224/29	10.2.158.225 – 10.2.158.230	10.2.158.231
94	10.2.158.232/29	10.2.158.233 – 10.2.158.238	10.2.158.239
95	10.2.158.240/29	10.2.158.241 – 10.2.158.246	10.2.158.247
96	10.2.158.248/29	10.2.158.249 – 10.2.158.254	10.2.158.255
97	10.2.159.0/29	10.2.159.1 – 10.2.159.6	10.2.159.7
98	10.2.159.8/29	10.2.159.9 – 10.2.159.14	10.2.159.15
99	10.2.159.16/29	10.2.159.17 – 10.2.159.22	10.2.159.23
100	10.2.159.24/29	10.2.159.25 – 10.2.159.30	10.2.159.31
101	10.2.159.32/29	10.2.159.33 – 10.2.159.38	10.2.159.39
102	10.2.159.40/29	10.2.159.41 – 10.2.159.46	10.2.159.47
103	10.2.159.48/29	10.2.159.49 – 10.2.159.54	10.2.159.55
104	10.2.159.56/29	10.2.159.57 – 10.2.159.62	10.2.159.63
105	10.2.159.64/29	10.2.159.65 – 10.2.159.70	10.2.159.71
106	10.2.159.72/29	10.2.159.73 – 10.2.159.78	10.2.159.79
107	10.2.159.80/29	10.2.159.81 – 10.2.159.86	10.2.159.87
108	10.2.159.88/29	10.2.159.89 – 10.2.159.94	10.2.159.95
109	10.2.159.96/29	10.2.159.97 – 10.2.159.102	10.2.159.103
110	10.2.159.104/29	10.2.159.105 – 10.2.159.110	10.2.159.111
111	10.2.159.112/29	10.2.159.113 – 10.2.159.118	10.2.159.119
112	10.2.159.120/29	10.2.159.121 – 10.2.159.126	10.2.159.127
113	10.2.159.128/29	10.2.159.129 – 10.2.159.134	10.2.159.135
114	10.2.159.136/29	10.2.159.137 – 10.2.159.142	10.2.159.143
115	10.2.159.144/29	10.2.159.145 – 10.2.159.150	10.2.159.151
116	10.2.159.152/29	10.2.159.153 – 10.2.159.158	10.2.159.159
117	10.2.159.160/29	10.2.159.161 – 10.2.159.166	10.2.159.167
118	10.2.159.168/29	10.2.159.169 – 10.2.159.174	10.2.159.175
119	10.2.159.176/29	10.2.159.177 – 10.2.159.182	10.2.159.183
120	10.2.159.184/29	10.2.159.185 – 10.2.159.190	10.2.159.191
121	10.2.159.192/29	10.2.159.193 – 10.2.159.198	10.2.159.199
122	10.2.159.200/29	10.2.159.201 – 10.2.159.206	10.2.159.207
123	10.2.159.208/29	10.2.159.209 – 10.2.159.214	10.2.159.215
124	10.2.159.216/29	10.2.159.217 – 10.2.159.222	10.2.159.223
125	10.2.159.224/29	10.2.159.225 – 10.2.159.230	10.2.159.231
126	10.2.159.232/29	10.2.159.233 – 10.2.159.238	10.2.159.239
127	10.2.159.240/29	10.2.159.241 – 10.2.159.246	10.2.159.247
128	10.2.159.248/29	10.2.159.249 – 10.2.159.254	10.2.159.255

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 →