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)10.71.152.0/22

network10.71.152.0/22

broadcast10.71.155.255

first host10.71.152.1

last host10.71.155.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.152.0/22

address00001010.01000111.10011000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.10011000.00000000

broadcast00001010.01000111.10011011.11111111

green = network part, grey = host part

hex0x0a479800

decimal172464128

reverse dns0.152.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:9800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.71.152.0/29	10.71.152.1 – 10.71.152.6	10.71.152.7
2	10.71.152.8/29	10.71.152.9 – 10.71.152.14	10.71.152.15
3	10.71.152.16/29	10.71.152.17 – 10.71.152.22	10.71.152.23
4	10.71.152.24/29	10.71.152.25 – 10.71.152.30	10.71.152.31
5	10.71.152.32/29	10.71.152.33 – 10.71.152.38	10.71.152.39
6	10.71.152.40/29	10.71.152.41 – 10.71.152.46	10.71.152.47
7	10.71.152.48/29	10.71.152.49 – 10.71.152.54	10.71.152.55
8	10.71.152.56/29	10.71.152.57 – 10.71.152.62	10.71.152.63
9	10.71.152.64/29	10.71.152.65 – 10.71.152.70	10.71.152.71
10	10.71.152.72/29	10.71.152.73 – 10.71.152.78	10.71.152.79
11	10.71.152.80/29	10.71.152.81 – 10.71.152.86	10.71.152.87
12	10.71.152.88/29	10.71.152.89 – 10.71.152.94	10.71.152.95
13	10.71.152.96/29	10.71.152.97 – 10.71.152.102	10.71.152.103
14	10.71.152.104/29	10.71.152.105 – 10.71.152.110	10.71.152.111
15	10.71.152.112/29	10.71.152.113 – 10.71.152.118	10.71.152.119
16	10.71.152.120/29	10.71.152.121 – 10.71.152.126	10.71.152.127
17	10.71.152.128/29	10.71.152.129 – 10.71.152.134	10.71.152.135
18	10.71.152.136/29	10.71.152.137 – 10.71.152.142	10.71.152.143
19	10.71.152.144/29	10.71.152.145 – 10.71.152.150	10.71.152.151
20	10.71.152.152/29	10.71.152.153 – 10.71.152.158	10.71.152.159
21	10.71.152.160/29	10.71.152.161 – 10.71.152.166	10.71.152.167
22	10.71.152.168/29	10.71.152.169 – 10.71.152.174	10.71.152.175
23	10.71.152.176/29	10.71.152.177 – 10.71.152.182	10.71.152.183
24	10.71.152.184/29	10.71.152.185 – 10.71.152.190	10.71.152.191
25	10.71.152.192/29	10.71.152.193 – 10.71.152.198	10.71.152.199
26	10.71.152.200/29	10.71.152.201 – 10.71.152.206	10.71.152.207
27	10.71.152.208/29	10.71.152.209 – 10.71.152.214	10.71.152.215
28	10.71.152.216/29	10.71.152.217 – 10.71.152.222	10.71.152.223
29	10.71.152.224/29	10.71.152.225 – 10.71.152.230	10.71.152.231
30	10.71.152.232/29	10.71.152.233 – 10.71.152.238	10.71.152.239
31	10.71.152.240/29	10.71.152.241 – 10.71.152.246	10.71.152.247
32	10.71.152.248/29	10.71.152.249 – 10.71.152.254	10.71.152.255
33	10.71.153.0/29	10.71.153.1 – 10.71.153.6	10.71.153.7
34	10.71.153.8/29	10.71.153.9 – 10.71.153.14	10.71.153.15
35	10.71.153.16/29	10.71.153.17 – 10.71.153.22	10.71.153.23
36	10.71.153.24/29	10.71.153.25 – 10.71.153.30	10.71.153.31
37	10.71.153.32/29	10.71.153.33 – 10.71.153.38	10.71.153.39
38	10.71.153.40/29	10.71.153.41 – 10.71.153.46	10.71.153.47
39	10.71.153.48/29	10.71.153.49 – 10.71.153.54	10.71.153.55
40	10.71.153.56/29	10.71.153.57 – 10.71.153.62	10.71.153.63
41	10.71.153.64/29	10.71.153.65 – 10.71.153.70	10.71.153.71
42	10.71.153.72/29	10.71.153.73 – 10.71.153.78	10.71.153.79
43	10.71.153.80/29	10.71.153.81 – 10.71.153.86	10.71.153.87
44	10.71.153.88/29	10.71.153.89 – 10.71.153.94	10.71.153.95
45	10.71.153.96/29	10.71.153.97 – 10.71.153.102	10.71.153.103
46	10.71.153.104/29	10.71.153.105 – 10.71.153.110	10.71.153.111
47	10.71.153.112/29	10.71.153.113 – 10.71.153.118	10.71.153.119
48	10.71.153.120/29	10.71.153.121 – 10.71.153.126	10.71.153.127
49	10.71.153.128/29	10.71.153.129 – 10.71.153.134	10.71.153.135
50	10.71.153.136/29	10.71.153.137 – 10.71.153.142	10.71.153.143
51	10.71.153.144/29	10.71.153.145 – 10.71.153.150	10.71.153.151
52	10.71.153.152/29	10.71.153.153 – 10.71.153.158	10.71.153.159
53	10.71.153.160/29	10.71.153.161 – 10.71.153.166	10.71.153.167
54	10.71.153.168/29	10.71.153.169 – 10.71.153.174	10.71.153.175
55	10.71.153.176/29	10.71.153.177 – 10.71.153.182	10.71.153.183
56	10.71.153.184/29	10.71.153.185 – 10.71.153.190	10.71.153.191
57	10.71.153.192/29	10.71.153.193 – 10.71.153.198	10.71.153.199
58	10.71.153.200/29	10.71.153.201 – 10.71.153.206	10.71.153.207
59	10.71.153.208/29	10.71.153.209 – 10.71.153.214	10.71.153.215
60	10.71.153.216/29	10.71.153.217 – 10.71.153.222	10.71.153.223
61	10.71.153.224/29	10.71.153.225 – 10.71.153.230	10.71.153.231
62	10.71.153.232/29	10.71.153.233 – 10.71.153.238	10.71.153.239
63	10.71.153.240/29	10.71.153.241 – 10.71.153.246	10.71.153.247
64	10.71.153.248/29	10.71.153.249 – 10.71.153.254	10.71.153.255
65	10.71.154.0/29	10.71.154.1 – 10.71.154.6	10.71.154.7
66	10.71.154.8/29	10.71.154.9 – 10.71.154.14	10.71.154.15
67	10.71.154.16/29	10.71.154.17 – 10.71.154.22	10.71.154.23
68	10.71.154.24/29	10.71.154.25 – 10.71.154.30	10.71.154.31
69	10.71.154.32/29	10.71.154.33 – 10.71.154.38	10.71.154.39
70	10.71.154.40/29	10.71.154.41 – 10.71.154.46	10.71.154.47
71	10.71.154.48/29	10.71.154.49 – 10.71.154.54	10.71.154.55
72	10.71.154.56/29	10.71.154.57 – 10.71.154.62	10.71.154.63
73	10.71.154.64/29	10.71.154.65 – 10.71.154.70	10.71.154.71
74	10.71.154.72/29	10.71.154.73 – 10.71.154.78	10.71.154.79
75	10.71.154.80/29	10.71.154.81 – 10.71.154.86	10.71.154.87
76	10.71.154.88/29	10.71.154.89 – 10.71.154.94	10.71.154.95
77	10.71.154.96/29	10.71.154.97 – 10.71.154.102	10.71.154.103
78	10.71.154.104/29	10.71.154.105 – 10.71.154.110	10.71.154.111
79	10.71.154.112/29	10.71.154.113 – 10.71.154.118	10.71.154.119
80	10.71.154.120/29	10.71.154.121 – 10.71.154.126	10.71.154.127
81	10.71.154.128/29	10.71.154.129 – 10.71.154.134	10.71.154.135
82	10.71.154.136/29	10.71.154.137 – 10.71.154.142	10.71.154.143
83	10.71.154.144/29	10.71.154.145 – 10.71.154.150	10.71.154.151
84	10.71.154.152/29	10.71.154.153 – 10.71.154.158	10.71.154.159
85	10.71.154.160/29	10.71.154.161 – 10.71.154.166	10.71.154.167
86	10.71.154.168/29	10.71.154.169 – 10.71.154.174	10.71.154.175
87	10.71.154.176/29	10.71.154.177 – 10.71.154.182	10.71.154.183
88	10.71.154.184/29	10.71.154.185 – 10.71.154.190	10.71.154.191
89	10.71.154.192/29	10.71.154.193 – 10.71.154.198	10.71.154.199
90	10.71.154.200/29	10.71.154.201 – 10.71.154.206	10.71.154.207
91	10.71.154.208/29	10.71.154.209 – 10.71.154.214	10.71.154.215
92	10.71.154.216/29	10.71.154.217 – 10.71.154.222	10.71.154.223
93	10.71.154.224/29	10.71.154.225 – 10.71.154.230	10.71.154.231
94	10.71.154.232/29	10.71.154.233 – 10.71.154.238	10.71.154.239
95	10.71.154.240/29	10.71.154.241 – 10.71.154.246	10.71.154.247
96	10.71.154.248/29	10.71.154.249 – 10.71.154.254	10.71.154.255
97	10.71.155.0/29	10.71.155.1 – 10.71.155.6	10.71.155.7
98	10.71.155.8/29	10.71.155.9 – 10.71.155.14	10.71.155.15
99	10.71.155.16/29	10.71.155.17 – 10.71.155.22	10.71.155.23
100	10.71.155.24/29	10.71.155.25 – 10.71.155.30	10.71.155.31
101	10.71.155.32/29	10.71.155.33 – 10.71.155.38	10.71.155.39
102	10.71.155.40/29	10.71.155.41 – 10.71.155.46	10.71.155.47
103	10.71.155.48/29	10.71.155.49 – 10.71.155.54	10.71.155.55
104	10.71.155.56/29	10.71.155.57 – 10.71.155.62	10.71.155.63
105	10.71.155.64/29	10.71.155.65 – 10.71.155.70	10.71.155.71
106	10.71.155.72/29	10.71.155.73 – 10.71.155.78	10.71.155.79
107	10.71.155.80/29	10.71.155.81 – 10.71.155.86	10.71.155.87
108	10.71.155.88/29	10.71.155.89 – 10.71.155.94	10.71.155.95
109	10.71.155.96/29	10.71.155.97 – 10.71.155.102	10.71.155.103
110	10.71.155.104/29	10.71.155.105 – 10.71.155.110	10.71.155.111
111	10.71.155.112/29	10.71.155.113 – 10.71.155.118	10.71.155.119
112	10.71.155.120/29	10.71.155.121 – 10.71.155.126	10.71.155.127
113	10.71.155.128/29	10.71.155.129 – 10.71.155.134	10.71.155.135
114	10.71.155.136/29	10.71.155.137 – 10.71.155.142	10.71.155.143
115	10.71.155.144/29	10.71.155.145 – 10.71.155.150	10.71.155.151
116	10.71.155.152/29	10.71.155.153 – 10.71.155.158	10.71.155.159
117	10.71.155.160/29	10.71.155.161 – 10.71.155.166	10.71.155.167
118	10.71.155.168/29	10.71.155.169 – 10.71.155.174	10.71.155.175
119	10.71.155.176/29	10.71.155.177 – 10.71.155.182	10.71.155.183
120	10.71.155.184/29	10.71.155.185 – 10.71.155.190	10.71.155.191
121	10.71.155.192/29	10.71.155.193 – 10.71.155.198	10.71.155.199
122	10.71.155.200/29	10.71.155.201 – 10.71.155.206	10.71.155.207
123	10.71.155.208/29	10.71.155.209 – 10.71.155.214	10.71.155.215
124	10.71.155.216/29	10.71.155.217 – 10.71.155.222	10.71.155.223
125	10.71.155.224/29	10.71.155.225 – 10.71.155.230	10.71.155.231
126	10.71.155.232/29	10.71.155.233 – 10.71.155.238	10.71.155.239
127	10.71.155.240/29	10.71.155.241 – 10.71.155.246	10.71.155.247
128	10.71.155.248/29	10.71.155.249 – 10.71.155.254	10.71.155.255

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 →