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)10.71.44.0/22

network10.71.44.0/22

broadcast10.71.47.255

first host10.71.44.1

last host10.71.47.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.44.0/22

address00001010.01000111.00101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.00101100.00000000

broadcast00001010.01000111.00101111.11111111

green = network part, grey = host part

hex0x0a472c00

decimal172436480

reverse dns0.44.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:2c00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.71.44.0/29	10.71.44.1 – 10.71.44.6	10.71.44.7
2	10.71.44.8/29	10.71.44.9 – 10.71.44.14	10.71.44.15
3	10.71.44.16/29	10.71.44.17 – 10.71.44.22	10.71.44.23
4	10.71.44.24/29	10.71.44.25 – 10.71.44.30	10.71.44.31
5	10.71.44.32/29	10.71.44.33 – 10.71.44.38	10.71.44.39
6	10.71.44.40/29	10.71.44.41 – 10.71.44.46	10.71.44.47
7	10.71.44.48/29	10.71.44.49 – 10.71.44.54	10.71.44.55
8	10.71.44.56/29	10.71.44.57 – 10.71.44.62	10.71.44.63
9	10.71.44.64/29	10.71.44.65 – 10.71.44.70	10.71.44.71
10	10.71.44.72/29	10.71.44.73 – 10.71.44.78	10.71.44.79
11	10.71.44.80/29	10.71.44.81 – 10.71.44.86	10.71.44.87
12	10.71.44.88/29	10.71.44.89 – 10.71.44.94	10.71.44.95
13	10.71.44.96/29	10.71.44.97 – 10.71.44.102	10.71.44.103
14	10.71.44.104/29	10.71.44.105 – 10.71.44.110	10.71.44.111
15	10.71.44.112/29	10.71.44.113 – 10.71.44.118	10.71.44.119
16	10.71.44.120/29	10.71.44.121 – 10.71.44.126	10.71.44.127
17	10.71.44.128/29	10.71.44.129 – 10.71.44.134	10.71.44.135
18	10.71.44.136/29	10.71.44.137 – 10.71.44.142	10.71.44.143
19	10.71.44.144/29	10.71.44.145 – 10.71.44.150	10.71.44.151
20	10.71.44.152/29	10.71.44.153 – 10.71.44.158	10.71.44.159
21	10.71.44.160/29	10.71.44.161 – 10.71.44.166	10.71.44.167
22	10.71.44.168/29	10.71.44.169 – 10.71.44.174	10.71.44.175
23	10.71.44.176/29	10.71.44.177 – 10.71.44.182	10.71.44.183
24	10.71.44.184/29	10.71.44.185 – 10.71.44.190	10.71.44.191
25	10.71.44.192/29	10.71.44.193 – 10.71.44.198	10.71.44.199
26	10.71.44.200/29	10.71.44.201 – 10.71.44.206	10.71.44.207
27	10.71.44.208/29	10.71.44.209 – 10.71.44.214	10.71.44.215
28	10.71.44.216/29	10.71.44.217 – 10.71.44.222	10.71.44.223
29	10.71.44.224/29	10.71.44.225 – 10.71.44.230	10.71.44.231
30	10.71.44.232/29	10.71.44.233 – 10.71.44.238	10.71.44.239
31	10.71.44.240/29	10.71.44.241 – 10.71.44.246	10.71.44.247
32	10.71.44.248/29	10.71.44.249 – 10.71.44.254	10.71.44.255
33	10.71.45.0/29	10.71.45.1 – 10.71.45.6	10.71.45.7
34	10.71.45.8/29	10.71.45.9 – 10.71.45.14	10.71.45.15
35	10.71.45.16/29	10.71.45.17 – 10.71.45.22	10.71.45.23
36	10.71.45.24/29	10.71.45.25 – 10.71.45.30	10.71.45.31
37	10.71.45.32/29	10.71.45.33 – 10.71.45.38	10.71.45.39
38	10.71.45.40/29	10.71.45.41 – 10.71.45.46	10.71.45.47
39	10.71.45.48/29	10.71.45.49 – 10.71.45.54	10.71.45.55
40	10.71.45.56/29	10.71.45.57 – 10.71.45.62	10.71.45.63
41	10.71.45.64/29	10.71.45.65 – 10.71.45.70	10.71.45.71
42	10.71.45.72/29	10.71.45.73 – 10.71.45.78	10.71.45.79
43	10.71.45.80/29	10.71.45.81 – 10.71.45.86	10.71.45.87
44	10.71.45.88/29	10.71.45.89 – 10.71.45.94	10.71.45.95
45	10.71.45.96/29	10.71.45.97 – 10.71.45.102	10.71.45.103
46	10.71.45.104/29	10.71.45.105 – 10.71.45.110	10.71.45.111
47	10.71.45.112/29	10.71.45.113 – 10.71.45.118	10.71.45.119
48	10.71.45.120/29	10.71.45.121 – 10.71.45.126	10.71.45.127
49	10.71.45.128/29	10.71.45.129 – 10.71.45.134	10.71.45.135
50	10.71.45.136/29	10.71.45.137 – 10.71.45.142	10.71.45.143
51	10.71.45.144/29	10.71.45.145 – 10.71.45.150	10.71.45.151
52	10.71.45.152/29	10.71.45.153 – 10.71.45.158	10.71.45.159
53	10.71.45.160/29	10.71.45.161 – 10.71.45.166	10.71.45.167
54	10.71.45.168/29	10.71.45.169 – 10.71.45.174	10.71.45.175
55	10.71.45.176/29	10.71.45.177 – 10.71.45.182	10.71.45.183
56	10.71.45.184/29	10.71.45.185 – 10.71.45.190	10.71.45.191
57	10.71.45.192/29	10.71.45.193 – 10.71.45.198	10.71.45.199
58	10.71.45.200/29	10.71.45.201 – 10.71.45.206	10.71.45.207
59	10.71.45.208/29	10.71.45.209 – 10.71.45.214	10.71.45.215
60	10.71.45.216/29	10.71.45.217 – 10.71.45.222	10.71.45.223
61	10.71.45.224/29	10.71.45.225 – 10.71.45.230	10.71.45.231
62	10.71.45.232/29	10.71.45.233 – 10.71.45.238	10.71.45.239
63	10.71.45.240/29	10.71.45.241 – 10.71.45.246	10.71.45.247
64	10.71.45.248/29	10.71.45.249 – 10.71.45.254	10.71.45.255
65	10.71.46.0/29	10.71.46.1 – 10.71.46.6	10.71.46.7
66	10.71.46.8/29	10.71.46.9 – 10.71.46.14	10.71.46.15
67	10.71.46.16/29	10.71.46.17 – 10.71.46.22	10.71.46.23
68	10.71.46.24/29	10.71.46.25 – 10.71.46.30	10.71.46.31
69	10.71.46.32/29	10.71.46.33 – 10.71.46.38	10.71.46.39
70	10.71.46.40/29	10.71.46.41 – 10.71.46.46	10.71.46.47
71	10.71.46.48/29	10.71.46.49 – 10.71.46.54	10.71.46.55
72	10.71.46.56/29	10.71.46.57 – 10.71.46.62	10.71.46.63
73	10.71.46.64/29	10.71.46.65 – 10.71.46.70	10.71.46.71
74	10.71.46.72/29	10.71.46.73 – 10.71.46.78	10.71.46.79
75	10.71.46.80/29	10.71.46.81 – 10.71.46.86	10.71.46.87
76	10.71.46.88/29	10.71.46.89 – 10.71.46.94	10.71.46.95
77	10.71.46.96/29	10.71.46.97 – 10.71.46.102	10.71.46.103
78	10.71.46.104/29	10.71.46.105 – 10.71.46.110	10.71.46.111
79	10.71.46.112/29	10.71.46.113 – 10.71.46.118	10.71.46.119
80	10.71.46.120/29	10.71.46.121 – 10.71.46.126	10.71.46.127
81	10.71.46.128/29	10.71.46.129 – 10.71.46.134	10.71.46.135
82	10.71.46.136/29	10.71.46.137 – 10.71.46.142	10.71.46.143
83	10.71.46.144/29	10.71.46.145 – 10.71.46.150	10.71.46.151
84	10.71.46.152/29	10.71.46.153 – 10.71.46.158	10.71.46.159
85	10.71.46.160/29	10.71.46.161 – 10.71.46.166	10.71.46.167
86	10.71.46.168/29	10.71.46.169 – 10.71.46.174	10.71.46.175
87	10.71.46.176/29	10.71.46.177 – 10.71.46.182	10.71.46.183
88	10.71.46.184/29	10.71.46.185 – 10.71.46.190	10.71.46.191
89	10.71.46.192/29	10.71.46.193 – 10.71.46.198	10.71.46.199
90	10.71.46.200/29	10.71.46.201 – 10.71.46.206	10.71.46.207
91	10.71.46.208/29	10.71.46.209 – 10.71.46.214	10.71.46.215
92	10.71.46.216/29	10.71.46.217 – 10.71.46.222	10.71.46.223
93	10.71.46.224/29	10.71.46.225 – 10.71.46.230	10.71.46.231
94	10.71.46.232/29	10.71.46.233 – 10.71.46.238	10.71.46.239
95	10.71.46.240/29	10.71.46.241 – 10.71.46.246	10.71.46.247
96	10.71.46.248/29	10.71.46.249 – 10.71.46.254	10.71.46.255
97	10.71.47.0/29	10.71.47.1 – 10.71.47.6	10.71.47.7
98	10.71.47.8/29	10.71.47.9 – 10.71.47.14	10.71.47.15
99	10.71.47.16/29	10.71.47.17 – 10.71.47.22	10.71.47.23
100	10.71.47.24/29	10.71.47.25 – 10.71.47.30	10.71.47.31
101	10.71.47.32/29	10.71.47.33 – 10.71.47.38	10.71.47.39
102	10.71.47.40/29	10.71.47.41 – 10.71.47.46	10.71.47.47
103	10.71.47.48/29	10.71.47.49 – 10.71.47.54	10.71.47.55
104	10.71.47.56/29	10.71.47.57 – 10.71.47.62	10.71.47.63
105	10.71.47.64/29	10.71.47.65 – 10.71.47.70	10.71.47.71
106	10.71.47.72/29	10.71.47.73 – 10.71.47.78	10.71.47.79
107	10.71.47.80/29	10.71.47.81 – 10.71.47.86	10.71.47.87
108	10.71.47.88/29	10.71.47.89 – 10.71.47.94	10.71.47.95
109	10.71.47.96/29	10.71.47.97 – 10.71.47.102	10.71.47.103
110	10.71.47.104/29	10.71.47.105 – 10.71.47.110	10.71.47.111
111	10.71.47.112/29	10.71.47.113 – 10.71.47.118	10.71.47.119
112	10.71.47.120/29	10.71.47.121 – 10.71.47.126	10.71.47.127
113	10.71.47.128/29	10.71.47.129 – 10.71.47.134	10.71.47.135
114	10.71.47.136/29	10.71.47.137 – 10.71.47.142	10.71.47.143
115	10.71.47.144/29	10.71.47.145 – 10.71.47.150	10.71.47.151
116	10.71.47.152/29	10.71.47.153 – 10.71.47.158	10.71.47.159
117	10.71.47.160/29	10.71.47.161 – 10.71.47.166	10.71.47.167
118	10.71.47.168/29	10.71.47.169 – 10.71.47.174	10.71.47.175
119	10.71.47.176/29	10.71.47.177 – 10.71.47.182	10.71.47.183
120	10.71.47.184/29	10.71.47.185 – 10.71.47.190	10.71.47.191
121	10.71.47.192/29	10.71.47.193 – 10.71.47.198	10.71.47.199
122	10.71.47.200/29	10.71.47.201 – 10.71.47.206	10.71.47.207
123	10.71.47.208/29	10.71.47.209 – 10.71.47.214	10.71.47.215
124	10.71.47.216/29	10.71.47.217 – 10.71.47.222	10.71.47.223
125	10.71.47.224/29	10.71.47.225 – 10.71.47.230	10.71.47.231
126	10.71.47.232/29	10.71.47.233 – 10.71.47.238	10.71.47.239
127	10.71.47.240/29	10.71.47.241 – 10.71.47.246	10.71.47.247
128	10.71.47.248/29	10.71.47.249 – 10.71.47.254	10.71.47.255

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 →