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)10.3.244.0/22

network10.3.244.0/22

broadcast10.3.247.255

first host10.3.244.1

last host10.3.247.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.244.0/22

address00001010.00000011.11110100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.11110100.00000000

broadcast00001010.00000011.11110111.11111111

green = network part, grey = host part

hex0x0a03f400

decimal168031232

reverse dns0.244.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:f400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.244.0/29	10.3.244.1 – 10.3.244.6	10.3.244.7
2	10.3.244.8/29	10.3.244.9 – 10.3.244.14	10.3.244.15
3	10.3.244.16/29	10.3.244.17 – 10.3.244.22	10.3.244.23
4	10.3.244.24/29	10.3.244.25 – 10.3.244.30	10.3.244.31
5	10.3.244.32/29	10.3.244.33 – 10.3.244.38	10.3.244.39
6	10.3.244.40/29	10.3.244.41 – 10.3.244.46	10.3.244.47
7	10.3.244.48/29	10.3.244.49 – 10.3.244.54	10.3.244.55
8	10.3.244.56/29	10.3.244.57 – 10.3.244.62	10.3.244.63
9	10.3.244.64/29	10.3.244.65 – 10.3.244.70	10.3.244.71
10	10.3.244.72/29	10.3.244.73 – 10.3.244.78	10.3.244.79
11	10.3.244.80/29	10.3.244.81 – 10.3.244.86	10.3.244.87
12	10.3.244.88/29	10.3.244.89 – 10.3.244.94	10.3.244.95
13	10.3.244.96/29	10.3.244.97 – 10.3.244.102	10.3.244.103
14	10.3.244.104/29	10.3.244.105 – 10.3.244.110	10.3.244.111
15	10.3.244.112/29	10.3.244.113 – 10.3.244.118	10.3.244.119
16	10.3.244.120/29	10.3.244.121 – 10.3.244.126	10.3.244.127
17	10.3.244.128/29	10.3.244.129 – 10.3.244.134	10.3.244.135
18	10.3.244.136/29	10.3.244.137 – 10.3.244.142	10.3.244.143
19	10.3.244.144/29	10.3.244.145 – 10.3.244.150	10.3.244.151
20	10.3.244.152/29	10.3.244.153 – 10.3.244.158	10.3.244.159
21	10.3.244.160/29	10.3.244.161 – 10.3.244.166	10.3.244.167
22	10.3.244.168/29	10.3.244.169 – 10.3.244.174	10.3.244.175
23	10.3.244.176/29	10.3.244.177 – 10.3.244.182	10.3.244.183
24	10.3.244.184/29	10.3.244.185 – 10.3.244.190	10.3.244.191
25	10.3.244.192/29	10.3.244.193 – 10.3.244.198	10.3.244.199
26	10.3.244.200/29	10.3.244.201 – 10.3.244.206	10.3.244.207
27	10.3.244.208/29	10.3.244.209 – 10.3.244.214	10.3.244.215
28	10.3.244.216/29	10.3.244.217 – 10.3.244.222	10.3.244.223
29	10.3.244.224/29	10.3.244.225 – 10.3.244.230	10.3.244.231
30	10.3.244.232/29	10.3.244.233 – 10.3.244.238	10.3.244.239
31	10.3.244.240/29	10.3.244.241 – 10.3.244.246	10.3.244.247
32	10.3.244.248/29	10.3.244.249 – 10.3.244.254	10.3.244.255
33	10.3.245.0/29	10.3.245.1 – 10.3.245.6	10.3.245.7
34	10.3.245.8/29	10.3.245.9 – 10.3.245.14	10.3.245.15
35	10.3.245.16/29	10.3.245.17 – 10.3.245.22	10.3.245.23
36	10.3.245.24/29	10.3.245.25 – 10.3.245.30	10.3.245.31
37	10.3.245.32/29	10.3.245.33 – 10.3.245.38	10.3.245.39
38	10.3.245.40/29	10.3.245.41 – 10.3.245.46	10.3.245.47
39	10.3.245.48/29	10.3.245.49 – 10.3.245.54	10.3.245.55
40	10.3.245.56/29	10.3.245.57 – 10.3.245.62	10.3.245.63
41	10.3.245.64/29	10.3.245.65 – 10.3.245.70	10.3.245.71
42	10.3.245.72/29	10.3.245.73 – 10.3.245.78	10.3.245.79
43	10.3.245.80/29	10.3.245.81 – 10.3.245.86	10.3.245.87
44	10.3.245.88/29	10.3.245.89 – 10.3.245.94	10.3.245.95
45	10.3.245.96/29	10.3.245.97 – 10.3.245.102	10.3.245.103
46	10.3.245.104/29	10.3.245.105 – 10.3.245.110	10.3.245.111
47	10.3.245.112/29	10.3.245.113 – 10.3.245.118	10.3.245.119
48	10.3.245.120/29	10.3.245.121 – 10.3.245.126	10.3.245.127
49	10.3.245.128/29	10.3.245.129 – 10.3.245.134	10.3.245.135
50	10.3.245.136/29	10.3.245.137 – 10.3.245.142	10.3.245.143
51	10.3.245.144/29	10.3.245.145 – 10.3.245.150	10.3.245.151
52	10.3.245.152/29	10.3.245.153 – 10.3.245.158	10.3.245.159
53	10.3.245.160/29	10.3.245.161 – 10.3.245.166	10.3.245.167
54	10.3.245.168/29	10.3.245.169 – 10.3.245.174	10.3.245.175
55	10.3.245.176/29	10.3.245.177 – 10.3.245.182	10.3.245.183
56	10.3.245.184/29	10.3.245.185 – 10.3.245.190	10.3.245.191
57	10.3.245.192/29	10.3.245.193 – 10.3.245.198	10.3.245.199
58	10.3.245.200/29	10.3.245.201 – 10.3.245.206	10.3.245.207
59	10.3.245.208/29	10.3.245.209 – 10.3.245.214	10.3.245.215
60	10.3.245.216/29	10.3.245.217 – 10.3.245.222	10.3.245.223
61	10.3.245.224/29	10.3.245.225 – 10.3.245.230	10.3.245.231
62	10.3.245.232/29	10.3.245.233 – 10.3.245.238	10.3.245.239
63	10.3.245.240/29	10.3.245.241 – 10.3.245.246	10.3.245.247
64	10.3.245.248/29	10.3.245.249 – 10.3.245.254	10.3.245.255
65	10.3.246.0/29	10.3.246.1 – 10.3.246.6	10.3.246.7
66	10.3.246.8/29	10.3.246.9 – 10.3.246.14	10.3.246.15
67	10.3.246.16/29	10.3.246.17 – 10.3.246.22	10.3.246.23
68	10.3.246.24/29	10.3.246.25 – 10.3.246.30	10.3.246.31
69	10.3.246.32/29	10.3.246.33 – 10.3.246.38	10.3.246.39
70	10.3.246.40/29	10.3.246.41 – 10.3.246.46	10.3.246.47
71	10.3.246.48/29	10.3.246.49 – 10.3.246.54	10.3.246.55
72	10.3.246.56/29	10.3.246.57 – 10.3.246.62	10.3.246.63
73	10.3.246.64/29	10.3.246.65 – 10.3.246.70	10.3.246.71
74	10.3.246.72/29	10.3.246.73 – 10.3.246.78	10.3.246.79
75	10.3.246.80/29	10.3.246.81 – 10.3.246.86	10.3.246.87
76	10.3.246.88/29	10.3.246.89 – 10.3.246.94	10.3.246.95
77	10.3.246.96/29	10.3.246.97 – 10.3.246.102	10.3.246.103
78	10.3.246.104/29	10.3.246.105 – 10.3.246.110	10.3.246.111
79	10.3.246.112/29	10.3.246.113 – 10.3.246.118	10.3.246.119
80	10.3.246.120/29	10.3.246.121 – 10.3.246.126	10.3.246.127
81	10.3.246.128/29	10.3.246.129 – 10.3.246.134	10.3.246.135
82	10.3.246.136/29	10.3.246.137 – 10.3.246.142	10.3.246.143
83	10.3.246.144/29	10.3.246.145 – 10.3.246.150	10.3.246.151
84	10.3.246.152/29	10.3.246.153 – 10.3.246.158	10.3.246.159
85	10.3.246.160/29	10.3.246.161 – 10.3.246.166	10.3.246.167
86	10.3.246.168/29	10.3.246.169 – 10.3.246.174	10.3.246.175
87	10.3.246.176/29	10.3.246.177 – 10.3.246.182	10.3.246.183
88	10.3.246.184/29	10.3.246.185 – 10.3.246.190	10.3.246.191
89	10.3.246.192/29	10.3.246.193 – 10.3.246.198	10.3.246.199
90	10.3.246.200/29	10.3.246.201 – 10.3.246.206	10.3.246.207
91	10.3.246.208/29	10.3.246.209 – 10.3.246.214	10.3.246.215
92	10.3.246.216/29	10.3.246.217 – 10.3.246.222	10.3.246.223
93	10.3.246.224/29	10.3.246.225 – 10.3.246.230	10.3.246.231
94	10.3.246.232/29	10.3.246.233 – 10.3.246.238	10.3.246.239
95	10.3.246.240/29	10.3.246.241 – 10.3.246.246	10.3.246.247
96	10.3.246.248/29	10.3.246.249 – 10.3.246.254	10.3.246.255
97	10.3.247.0/29	10.3.247.1 – 10.3.247.6	10.3.247.7
98	10.3.247.8/29	10.3.247.9 – 10.3.247.14	10.3.247.15
99	10.3.247.16/29	10.3.247.17 – 10.3.247.22	10.3.247.23
100	10.3.247.24/29	10.3.247.25 – 10.3.247.30	10.3.247.31
101	10.3.247.32/29	10.3.247.33 – 10.3.247.38	10.3.247.39
102	10.3.247.40/29	10.3.247.41 – 10.3.247.46	10.3.247.47
103	10.3.247.48/29	10.3.247.49 – 10.3.247.54	10.3.247.55
104	10.3.247.56/29	10.3.247.57 – 10.3.247.62	10.3.247.63
105	10.3.247.64/29	10.3.247.65 – 10.3.247.70	10.3.247.71
106	10.3.247.72/29	10.3.247.73 – 10.3.247.78	10.3.247.79
107	10.3.247.80/29	10.3.247.81 – 10.3.247.86	10.3.247.87
108	10.3.247.88/29	10.3.247.89 – 10.3.247.94	10.3.247.95
109	10.3.247.96/29	10.3.247.97 – 10.3.247.102	10.3.247.103
110	10.3.247.104/29	10.3.247.105 – 10.3.247.110	10.3.247.111
111	10.3.247.112/29	10.3.247.113 – 10.3.247.118	10.3.247.119
112	10.3.247.120/29	10.3.247.121 – 10.3.247.126	10.3.247.127
113	10.3.247.128/29	10.3.247.129 – 10.3.247.134	10.3.247.135
114	10.3.247.136/29	10.3.247.137 – 10.3.247.142	10.3.247.143
115	10.3.247.144/29	10.3.247.145 – 10.3.247.150	10.3.247.151
116	10.3.247.152/29	10.3.247.153 – 10.3.247.158	10.3.247.159
117	10.3.247.160/29	10.3.247.161 – 10.3.247.166	10.3.247.167
118	10.3.247.168/29	10.3.247.169 – 10.3.247.174	10.3.247.175
119	10.3.247.176/29	10.3.247.177 – 10.3.247.182	10.3.247.183
120	10.3.247.184/29	10.3.247.185 – 10.3.247.190	10.3.247.191
121	10.3.247.192/29	10.3.247.193 – 10.3.247.198	10.3.247.199
122	10.3.247.200/29	10.3.247.201 – 10.3.247.206	10.3.247.207
123	10.3.247.208/29	10.3.247.209 – 10.3.247.214	10.3.247.215
124	10.3.247.216/29	10.3.247.217 – 10.3.247.222	10.3.247.223
125	10.3.247.224/29	10.3.247.225 – 10.3.247.230	10.3.247.231
126	10.3.247.232/29	10.3.247.233 – 10.3.247.238	10.3.247.239
127	10.3.247.240/29	10.3.247.241 – 10.3.247.246	10.3.247.247
128	10.3.247.248/29	10.3.247.249 – 10.3.247.254	10.3.247.255

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 →