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)10.3.172.0/22

network10.3.172.0/22

broadcast10.3.175.255

first host10.3.172.1

last host10.3.175.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.172.0/22

address00001010.00000011.10101100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10101100.00000000

broadcast00001010.00000011.10101111.11111111

green = network part, grey = host part

hex0x0a03ac00

decimal168012800

reverse dns0.172.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:ac00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.172.0/29	10.3.172.1 – 10.3.172.6	10.3.172.7
2	10.3.172.8/29	10.3.172.9 – 10.3.172.14	10.3.172.15
3	10.3.172.16/29	10.3.172.17 – 10.3.172.22	10.3.172.23
4	10.3.172.24/29	10.3.172.25 – 10.3.172.30	10.3.172.31
5	10.3.172.32/29	10.3.172.33 – 10.3.172.38	10.3.172.39
6	10.3.172.40/29	10.3.172.41 – 10.3.172.46	10.3.172.47
7	10.3.172.48/29	10.3.172.49 – 10.3.172.54	10.3.172.55
8	10.3.172.56/29	10.3.172.57 – 10.3.172.62	10.3.172.63
9	10.3.172.64/29	10.3.172.65 – 10.3.172.70	10.3.172.71
10	10.3.172.72/29	10.3.172.73 – 10.3.172.78	10.3.172.79
11	10.3.172.80/29	10.3.172.81 – 10.3.172.86	10.3.172.87
12	10.3.172.88/29	10.3.172.89 – 10.3.172.94	10.3.172.95
13	10.3.172.96/29	10.3.172.97 – 10.3.172.102	10.3.172.103
14	10.3.172.104/29	10.3.172.105 – 10.3.172.110	10.3.172.111
15	10.3.172.112/29	10.3.172.113 – 10.3.172.118	10.3.172.119
16	10.3.172.120/29	10.3.172.121 – 10.3.172.126	10.3.172.127
17	10.3.172.128/29	10.3.172.129 – 10.3.172.134	10.3.172.135
18	10.3.172.136/29	10.3.172.137 – 10.3.172.142	10.3.172.143
19	10.3.172.144/29	10.3.172.145 – 10.3.172.150	10.3.172.151
20	10.3.172.152/29	10.3.172.153 – 10.3.172.158	10.3.172.159
21	10.3.172.160/29	10.3.172.161 – 10.3.172.166	10.3.172.167
22	10.3.172.168/29	10.3.172.169 – 10.3.172.174	10.3.172.175
23	10.3.172.176/29	10.3.172.177 – 10.3.172.182	10.3.172.183
24	10.3.172.184/29	10.3.172.185 – 10.3.172.190	10.3.172.191
25	10.3.172.192/29	10.3.172.193 – 10.3.172.198	10.3.172.199
26	10.3.172.200/29	10.3.172.201 – 10.3.172.206	10.3.172.207
27	10.3.172.208/29	10.3.172.209 – 10.3.172.214	10.3.172.215
28	10.3.172.216/29	10.3.172.217 – 10.3.172.222	10.3.172.223
29	10.3.172.224/29	10.3.172.225 – 10.3.172.230	10.3.172.231
30	10.3.172.232/29	10.3.172.233 – 10.3.172.238	10.3.172.239
31	10.3.172.240/29	10.3.172.241 – 10.3.172.246	10.3.172.247
32	10.3.172.248/29	10.3.172.249 – 10.3.172.254	10.3.172.255
33	10.3.173.0/29	10.3.173.1 – 10.3.173.6	10.3.173.7
34	10.3.173.8/29	10.3.173.9 – 10.3.173.14	10.3.173.15
35	10.3.173.16/29	10.3.173.17 – 10.3.173.22	10.3.173.23
36	10.3.173.24/29	10.3.173.25 – 10.3.173.30	10.3.173.31
37	10.3.173.32/29	10.3.173.33 – 10.3.173.38	10.3.173.39
38	10.3.173.40/29	10.3.173.41 – 10.3.173.46	10.3.173.47
39	10.3.173.48/29	10.3.173.49 – 10.3.173.54	10.3.173.55
40	10.3.173.56/29	10.3.173.57 – 10.3.173.62	10.3.173.63
41	10.3.173.64/29	10.3.173.65 – 10.3.173.70	10.3.173.71
42	10.3.173.72/29	10.3.173.73 – 10.3.173.78	10.3.173.79
43	10.3.173.80/29	10.3.173.81 – 10.3.173.86	10.3.173.87
44	10.3.173.88/29	10.3.173.89 – 10.3.173.94	10.3.173.95
45	10.3.173.96/29	10.3.173.97 – 10.3.173.102	10.3.173.103
46	10.3.173.104/29	10.3.173.105 – 10.3.173.110	10.3.173.111
47	10.3.173.112/29	10.3.173.113 – 10.3.173.118	10.3.173.119
48	10.3.173.120/29	10.3.173.121 – 10.3.173.126	10.3.173.127
49	10.3.173.128/29	10.3.173.129 – 10.3.173.134	10.3.173.135
50	10.3.173.136/29	10.3.173.137 – 10.3.173.142	10.3.173.143
51	10.3.173.144/29	10.3.173.145 – 10.3.173.150	10.3.173.151
52	10.3.173.152/29	10.3.173.153 – 10.3.173.158	10.3.173.159
53	10.3.173.160/29	10.3.173.161 – 10.3.173.166	10.3.173.167
54	10.3.173.168/29	10.3.173.169 – 10.3.173.174	10.3.173.175
55	10.3.173.176/29	10.3.173.177 – 10.3.173.182	10.3.173.183
56	10.3.173.184/29	10.3.173.185 – 10.3.173.190	10.3.173.191
57	10.3.173.192/29	10.3.173.193 – 10.3.173.198	10.3.173.199
58	10.3.173.200/29	10.3.173.201 – 10.3.173.206	10.3.173.207
59	10.3.173.208/29	10.3.173.209 – 10.3.173.214	10.3.173.215
60	10.3.173.216/29	10.3.173.217 – 10.3.173.222	10.3.173.223
61	10.3.173.224/29	10.3.173.225 – 10.3.173.230	10.3.173.231
62	10.3.173.232/29	10.3.173.233 – 10.3.173.238	10.3.173.239
63	10.3.173.240/29	10.3.173.241 – 10.3.173.246	10.3.173.247
64	10.3.173.248/29	10.3.173.249 – 10.3.173.254	10.3.173.255
65	10.3.174.0/29	10.3.174.1 – 10.3.174.6	10.3.174.7
66	10.3.174.8/29	10.3.174.9 – 10.3.174.14	10.3.174.15
67	10.3.174.16/29	10.3.174.17 – 10.3.174.22	10.3.174.23
68	10.3.174.24/29	10.3.174.25 – 10.3.174.30	10.3.174.31
69	10.3.174.32/29	10.3.174.33 – 10.3.174.38	10.3.174.39
70	10.3.174.40/29	10.3.174.41 – 10.3.174.46	10.3.174.47
71	10.3.174.48/29	10.3.174.49 – 10.3.174.54	10.3.174.55
72	10.3.174.56/29	10.3.174.57 – 10.3.174.62	10.3.174.63
73	10.3.174.64/29	10.3.174.65 – 10.3.174.70	10.3.174.71
74	10.3.174.72/29	10.3.174.73 – 10.3.174.78	10.3.174.79
75	10.3.174.80/29	10.3.174.81 – 10.3.174.86	10.3.174.87
76	10.3.174.88/29	10.3.174.89 – 10.3.174.94	10.3.174.95
77	10.3.174.96/29	10.3.174.97 – 10.3.174.102	10.3.174.103
78	10.3.174.104/29	10.3.174.105 – 10.3.174.110	10.3.174.111
79	10.3.174.112/29	10.3.174.113 – 10.3.174.118	10.3.174.119
80	10.3.174.120/29	10.3.174.121 – 10.3.174.126	10.3.174.127
81	10.3.174.128/29	10.3.174.129 – 10.3.174.134	10.3.174.135
82	10.3.174.136/29	10.3.174.137 – 10.3.174.142	10.3.174.143
83	10.3.174.144/29	10.3.174.145 – 10.3.174.150	10.3.174.151
84	10.3.174.152/29	10.3.174.153 – 10.3.174.158	10.3.174.159
85	10.3.174.160/29	10.3.174.161 – 10.3.174.166	10.3.174.167
86	10.3.174.168/29	10.3.174.169 – 10.3.174.174	10.3.174.175
87	10.3.174.176/29	10.3.174.177 – 10.3.174.182	10.3.174.183
88	10.3.174.184/29	10.3.174.185 – 10.3.174.190	10.3.174.191
89	10.3.174.192/29	10.3.174.193 – 10.3.174.198	10.3.174.199
90	10.3.174.200/29	10.3.174.201 – 10.3.174.206	10.3.174.207
91	10.3.174.208/29	10.3.174.209 – 10.3.174.214	10.3.174.215
92	10.3.174.216/29	10.3.174.217 – 10.3.174.222	10.3.174.223
93	10.3.174.224/29	10.3.174.225 – 10.3.174.230	10.3.174.231
94	10.3.174.232/29	10.3.174.233 – 10.3.174.238	10.3.174.239
95	10.3.174.240/29	10.3.174.241 – 10.3.174.246	10.3.174.247
96	10.3.174.248/29	10.3.174.249 – 10.3.174.254	10.3.174.255
97	10.3.175.0/29	10.3.175.1 – 10.3.175.6	10.3.175.7
98	10.3.175.8/29	10.3.175.9 – 10.3.175.14	10.3.175.15
99	10.3.175.16/29	10.3.175.17 – 10.3.175.22	10.3.175.23
100	10.3.175.24/29	10.3.175.25 – 10.3.175.30	10.3.175.31
101	10.3.175.32/29	10.3.175.33 – 10.3.175.38	10.3.175.39
102	10.3.175.40/29	10.3.175.41 – 10.3.175.46	10.3.175.47
103	10.3.175.48/29	10.3.175.49 – 10.3.175.54	10.3.175.55
104	10.3.175.56/29	10.3.175.57 – 10.3.175.62	10.3.175.63
105	10.3.175.64/29	10.3.175.65 – 10.3.175.70	10.3.175.71
106	10.3.175.72/29	10.3.175.73 – 10.3.175.78	10.3.175.79
107	10.3.175.80/29	10.3.175.81 – 10.3.175.86	10.3.175.87
108	10.3.175.88/29	10.3.175.89 – 10.3.175.94	10.3.175.95
109	10.3.175.96/29	10.3.175.97 – 10.3.175.102	10.3.175.103
110	10.3.175.104/29	10.3.175.105 – 10.3.175.110	10.3.175.111
111	10.3.175.112/29	10.3.175.113 – 10.3.175.118	10.3.175.119
112	10.3.175.120/29	10.3.175.121 – 10.3.175.126	10.3.175.127
113	10.3.175.128/29	10.3.175.129 – 10.3.175.134	10.3.175.135
114	10.3.175.136/29	10.3.175.137 – 10.3.175.142	10.3.175.143
115	10.3.175.144/29	10.3.175.145 – 10.3.175.150	10.3.175.151
116	10.3.175.152/29	10.3.175.153 – 10.3.175.158	10.3.175.159
117	10.3.175.160/29	10.3.175.161 – 10.3.175.166	10.3.175.167
118	10.3.175.168/29	10.3.175.169 – 10.3.175.174	10.3.175.175
119	10.3.175.176/29	10.3.175.177 – 10.3.175.182	10.3.175.183
120	10.3.175.184/29	10.3.175.185 – 10.3.175.190	10.3.175.191
121	10.3.175.192/29	10.3.175.193 – 10.3.175.198	10.3.175.199
122	10.3.175.200/29	10.3.175.201 – 10.3.175.206	10.3.175.207
123	10.3.175.208/29	10.3.175.209 – 10.3.175.214	10.3.175.215
124	10.3.175.216/29	10.3.175.217 – 10.3.175.222	10.3.175.223
125	10.3.175.224/29	10.3.175.225 – 10.3.175.230	10.3.175.231
126	10.3.175.232/29	10.3.175.233 – 10.3.175.238	10.3.175.239
127	10.3.175.240/29	10.3.175.241 – 10.3.175.246	10.3.175.247
128	10.3.175.248/29	10.3.175.249 – 10.3.175.254	10.3.175.255

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 →