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)10.45.136.0/22

network10.45.136.0/22

broadcast10.45.139.255

first host10.45.136.1

last host10.45.139.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.45.136.0/22

address00001010.00101101.10001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00101101.10001000.00000000

broadcast00001010.00101101.10001011.11111111

green = network part, grey = host part

hex0x0a2d8800

decimal170756096

reverse dns0.136.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:8800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.45.136.0/29	10.45.136.1 – 10.45.136.6	10.45.136.7
2	10.45.136.8/29	10.45.136.9 – 10.45.136.14	10.45.136.15
3	10.45.136.16/29	10.45.136.17 – 10.45.136.22	10.45.136.23
4	10.45.136.24/29	10.45.136.25 – 10.45.136.30	10.45.136.31
5	10.45.136.32/29	10.45.136.33 – 10.45.136.38	10.45.136.39
6	10.45.136.40/29	10.45.136.41 – 10.45.136.46	10.45.136.47
7	10.45.136.48/29	10.45.136.49 – 10.45.136.54	10.45.136.55
8	10.45.136.56/29	10.45.136.57 – 10.45.136.62	10.45.136.63
9	10.45.136.64/29	10.45.136.65 – 10.45.136.70	10.45.136.71
10	10.45.136.72/29	10.45.136.73 – 10.45.136.78	10.45.136.79
11	10.45.136.80/29	10.45.136.81 – 10.45.136.86	10.45.136.87
12	10.45.136.88/29	10.45.136.89 – 10.45.136.94	10.45.136.95
13	10.45.136.96/29	10.45.136.97 – 10.45.136.102	10.45.136.103
14	10.45.136.104/29	10.45.136.105 – 10.45.136.110	10.45.136.111
15	10.45.136.112/29	10.45.136.113 – 10.45.136.118	10.45.136.119
16	10.45.136.120/29	10.45.136.121 – 10.45.136.126	10.45.136.127
17	10.45.136.128/29	10.45.136.129 – 10.45.136.134	10.45.136.135
18	10.45.136.136/29	10.45.136.137 – 10.45.136.142	10.45.136.143
19	10.45.136.144/29	10.45.136.145 – 10.45.136.150	10.45.136.151
20	10.45.136.152/29	10.45.136.153 – 10.45.136.158	10.45.136.159
21	10.45.136.160/29	10.45.136.161 – 10.45.136.166	10.45.136.167
22	10.45.136.168/29	10.45.136.169 – 10.45.136.174	10.45.136.175
23	10.45.136.176/29	10.45.136.177 – 10.45.136.182	10.45.136.183
24	10.45.136.184/29	10.45.136.185 – 10.45.136.190	10.45.136.191
25	10.45.136.192/29	10.45.136.193 – 10.45.136.198	10.45.136.199
26	10.45.136.200/29	10.45.136.201 – 10.45.136.206	10.45.136.207
27	10.45.136.208/29	10.45.136.209 – 10.45.136.214	10.45.136.215
28	10.45.136.216/29	10.45.136.217 – 10.45.136.222	10.45.136.223
29	10.45.136.224/29	10.45.136.225 – 10.45.136.230	10.45.136.231
30	10.45.136.232/29	10.45.136.233 – 10.45.136.238	10.45.136.239
31	10.45.136.240/29	10.45.136.241 – 10.45.136.246	10.45.136.247
32	10.45.136.248/29	10.45.136.249 – 10.45.136.254	10.45.136.255
33	10.45.137.0/29	10.45.137.1 – 10.45.137.6	10.45.137.7
34	10.45.137.8/29	10.45.137.9 – 10.45.137.14	10.45.137.15
35	10.45.137.16/29	10.45.137.17 – 10.45.137.22	10.45.137.23
36	10.45.137.24/29	10.45.137.25 – 10.45.137.30	10.45.137.31
37	10.45.137.32/29	10.45.137.33 – 10.45.137.38	10.45.137.39
38	10.45.137.40/29	10.45.137.41 – 10.45.137.46	10.45.137.47
39	10.45.137.48/29	10.45.137.49 – 10.45.137.54	10.45.137.55
40	10.45.137.56/29	10.45.137.57 – 10.45.137.62	10.45.137.63
41	10.45.137.64/29	10.45.137.65 – 10.45.137.70	10.45.137.71
42	10.45.137.72/29	10.45.137.73 – 10.45.137.78	10.45.137.79
43	10.45.137.80/29	10.45.137.81 – 10.45.137.86	10.45.137.87
44	10.45.137.88/29	10.45.137.89 – 10.45.137.94	10.45.137.95
45	10.45.137.96/29	10.45.137.97 – 10.45.137.102	10.45.137.103
46	10.45.137.104/29	10.45.137.105 – 10.45.137.110	10.45.137.111
47	10.45.137.112/29	10.45.137.113 – 10.45.137.118	10.45.137.119
48	10.45.137.120/29	10.45.137.121 – 10.45.137.126	10.45.137.127
49	10.45.137.128/29	10.45.137.129 – 10.45.137.134	10.45.137.135
50	10.45.137.136/29	10.45.137.137 – 10.45.137.142	10.45.137.143
51	10.45.137.144/29	10.45.137.145 – 10.45.137.150	10.45.137.151
52	10.45.137.152/29	10.45.137.153 – 10.45.137.158	10.45.137.159
53	10.45.137.160/29	10.45.137.161 – 10.45.137.166	10.45.137.167
54	10.45.137.168/29	10.45.137.169 – 10.45.137.174	10.45.137.175
55	10.45.137.176/29	10.45.137.177 – 10.45.137.182	10.45.137.183
56	10.45.137.184/29	10.45.137.185 – 10.45.137.190	10.45.137.191
57	10.45.137.192/29	10.45.137.193 – 10.45.137.198	10.45.137.199
58	10.45.137.200/29	10.45.137.201 – 10.45.137.206	10.45.137.207
59	10.45.137.208/29	10.45.137.209 – 10.45.137.214	10.45.137.215
60	10.45.137.216/29	10.45.137.217 – 10.45.137.222	10.45.137.223
61	10.45.137.224/29	10.45.137.225 – 10.45.137.230	10.45.137.231
62	10.45.137.232/29	10.45.137.233 – 10.45.137.238	10.45.137.239
63	10.45.137.240/29	10.45.137.241 – 10.45.137.246	10.45.137.247
64	10.45.137.248/29	10.45.137.249 – 10.45.137.254	10.45.137.255
65	10.45.138.0/29	10.45.138.1 – 10.45.138.6	10.45.138.7
66	10.45.138.8/29	10.45.138.9 – 10.45.138.14	10.45.138.15
67	10.45.138.16/29	10.45.138.17 – 10.45.138.22	10.45.138.23
68	10.45.138.24/29	10.45.138.25 – 10.45.138.30	10.45.138.31
69	10.45.138.32/29	10.45.138.33 – 10.45.138.38	10.45.138.39
70	10.45.138.40/29	10.45.138.41 – 10.45.138.46	10.45.138.47
71	10.45.138.48/29	10.45.138.49 – 10.45.138.54	10.45.138.55
72	10.45.138.56/29	10.45.138.57 – 10.45.138.62	10.45.138.63
73	10.45.138.64/29	10.45.138.65 – 10.45.138.70	10.45.138.71
74	10.45.138.72/29	10.45.138.73 – 10.45.138.78	10.45.138.79
75	10.45.138.80/29	10.45.138.81 – 10.45.138.86	10.45.138.87
76	10.45.138.88/29	10.45.138.89 – 10.45.138.94	10.45.138.95
77	10.45.138.96/29	10.45.138.97 – 10.45.138.102	10.45.138.103
78	10.45.138.104/29	10.45.138.105 – 10.45.138.110	10.45.138.111
79	10.45.138.112/29	10.45.138.113 – 10.45.138.118	10.45.138.119
80	10.45.138.120/29	10.45.138.121 – 10.45.138.126	10.45.138.127
81	10.45.138.128/29	10.45.138.129 – 10.45.138.134	10.45.138.135
82	10.45.138.136/29	10.45.138.137 – 10.45.138.142	10.45.138.143
83	10.45.138.144/29	10.45.138.145 – 10.45.138.150	10.45.138.151
84	10.45.138.152/29	10.45.138.153 – 10.45.138.158	10.45.138.159
85	10.45.138.160/29	10.45.138.161 – 10.45.138.166	10.45.138.167
86	10.45.138.168/29	10.45.138.169 – 10.45.138.174	10.45.138.175
87	10.45.138.176/29	10.45.138.177 – 10.45.138.182	10.45.138.183
88	10.45.138.184/29	10.45.138.185 – 10.45.138.190	10.45.138.191
89	10.45.138.192/29	10.45.138.193 – 10.45.138.198	10.45.138.199
90	10.45.138.200/29	10.45.138.201 – 10.45.138.206	10.45.138.207
91	10.45.138.208/29	10.45.138.209 – 10.45.138.214	10.45.138.215
92	10.45.138.216/29	10.45.138.217 – 10.45.138.222	10.45.138.223
93	10.45.138.224/29	10.45.138.225 – 10.45.138.230	10.45.138.231
94	10.45.138.232/29	10.45.138.233 – 10.45.138.238	10.45.138.239
95	10.45.138.240/29	10.45.138.241 – 10.45.138.246	10.45.138.247
96	10.45.138.248/29	10.45.138.249 – 10.45.138.254	10.45.138.255
97	10.45.139.0/29	10.45.139.1 – 10.45.139.6	10.45.139.7
98	10.45.139.8/29	10.45.139.9 – 10.45.139.14	10.45.139.15
99	10.45.139.16/29	10.45.139.17 – 10.45.139.22	10.45.139.23
100	10.45.139.24/29	10.45.139.25 – 10.45.139.30	10.45.139.31
101	10.45.139.32/29	10.45.139.33 – 10.45.139.38	10.45.139.39
102	10.45.139.40/29	10.45.139.41 – 10.45.139.46	10.45.139.47
103	10.45.139.48/29	10.45.139.49 – 10.45.139.54	10.45.139.55
104	10.45.139.56/29	10.45.139.57 – 10.45.139.62	10.45.139.63
105	10.45.139.64/29	10.45.139.65 – 10.45.139.70	10.45.139.71
106	10.45.139.72/29	10.45.139.73 – 10.45.139.78	10.45.139.79
107	10.45.139.80/29	10.45.139.81 – 10.45.139.86	10.45.139.87
108	10.45.139.88/29	10.45.139.89 – 10.45.139.94	10.45.139.95
109	10.45.139.96/29	10.45.139.97 – 10.45.139.102	10.45.139.103
110	10.45.139.104/29	10.45.139.105 – 10.45.139.110	10.45.139.111
111	10.45.139.112/29	10.45.139.113 – 10.45.139.118	10.45.139.119
112	10.45.139.120/29	10.45.139.121 – 10.45.139.126	10.45.139.127
113	10.45.139.128/29	10.45.139.129 – 10.45.139.134	10.45.139.135
114	10.45.139.136/29	10.45.139.137 – 10.45.139.142	10.45.139.143
115	10.45.139.144/29	10.45.139.145 – 10.45.139.150	10.45.139.151
116	10.45.139.152/29	10.45.139.153 – 10.45.139.158	10.45.139.159
117	10.45.139.160/29	10.45.139.161 – 10.45.139.166	10.45.139.167
118	10.45.139.168/29	10.45.139.169 – 10.45.139.174	10.45.139.175
119	10.45.139.176/29	10.45.139.177 – 10.45.139.182	10.45.139.183
120	10.45.139.184/29	10.45.139.185 – 10.45.139.190	10.45.139.191
121	10.45.139.192/29	10.45.139.193 – 10.45.139.198	10.45.139.199
122	10.45.139.200/29	10.45.139.201 – 10.45.139.206	10.45.139.207
123	10.45.139.208/29	10.45.139.209 – 10.45.139.214	10.45.139.215
124	10.45.139.216/29	10.45.139.217 – 10.45.139.222	10.45.139.223
125	10.45.139.224/29	10.45.139.225 – 10.45.139.230	10.45.139.231
126	10.45.139.232/29	10.45.139.233 – 10.45.139.238	10.45.139.239
127	10.45.139.240/29	10.45.139.241 – 10.45.139.246	10.45.139.247
128	10.45.139.248/29	10.45.139.249 – 10.45.139.254	10.45.139.255

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 →