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)10.167.164.0/23

network10.167.164.0/23

broadcast10.167.165.255

first host10.167.164.1

last host10.167.165.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.164.0/23

address00001010.10100111.10100100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.10100100.00000000

broadcast00001010.10100111.10100101.11111111

green = network part, grey = host part

hex0x0aa7a400

decimal178758656

reverse dns0.164.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:a400

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.164.0/30	10.167.164.1 – 10.167.164.2	10.167.164.3
2	10.167.164.4/30	10.167.164.5 – 10.167.164.6	10.167.164.7
3	10.167.164.8/30	10.167.164.9 – 10.167.164.10	10.167.164.11
4	10.167.164.12/30	10.167.164.13 – 10.167.164.14	10.167.164.15
5	10.167.164.16/30	10.167.164.17 – 10.167.164.18	10.167.164.19
6	10.167.164.20/30	10.167.164.21 – 10.167.164.22	10.167.164.23
7	10.167.164.24/30	10.167.164.25 – 10.167.164.26	10.167.164.27
8	10.167.164.28/30	10.167.164.29 – 10.167.164.30	10.167.164.31
9	10.167.164.32/30	10.167.164.33 – 10.167.164.34	10.167.164.35
10	10.167.164.36/30	10.167.164.37 – 10.167.164.38	10.167.164.39
11	10.167.164.40/30	10.167.164.41 – 10.167.164.42	10.167.164.43
12	10.167.164.44/30	10.167.164.45 – 10.167.164.46	10.167.164.47
13	10.167.164.48/30	10.167.164.49 – 10.167.164.50	10.167.164.51
14	10.167.164.52/30	10.167.164.53 – 10.167.164.54	10.167.164.55
15	10.167.164.56/30	10.167.164.57 – 10.167.164.58	10.167.164.59
16	10.167.164.60/30	10.167.164.61 – 10.167.164.62	10.167.164.63
17	10.167.164.64/30	10.167.164.65 – 10.167.164.66	10.167.164.67
18	10.167.164.68/30	10.167.164.69 – 10.167.164.70	10.167.164.71
19	10.167.164.72/30	10.167.164.73 – 10.167.164.74	10.167.164.75
20	10.167.164.76/30	10.167.164.77 – 10.167.164.78	10.167.164.79
21	10.167.164.80/30	10.167.164.81 – 10.167.164.82	10.167.164.83
22	10.167.164.84/30	10.167.164.85 – 10.167.164.86	10.167.164.87
23	10.167.164.88/30	10.167.164.89 – 10.167.164.90	10.167.164.91
24	10.167.164.92/30	10.167.164.93 – 10.167.164.94	10.167.164.95
25	10.167.164.96/30	10.167.164.97 – 10.167.164.98	10.167.164.99
26	10.167.164.100/30	10.167.164.101 – 10.167.164.102	10.167.164.103
27	10.167.164.104/30	10.167.164.105 – 10.167.164.106	10.167.164.107
28	10.167.164.108/30	10.167.164.109 – 10.167.164.110	10.167.164.111
29	10.167.164.112/30	10.167.164.113 – 10.167.164.114	10.167.164.115
30	10.167.164.116/30	10.167.164.117 – 10.167.164.118	10.167.164.119
31	10.167.164.120/30	10.167.164.121 – 10.167.164.122	10.167.164.123
32	10.167.164.124/30	10.167.164.125 – 10.167.164.126	10.167.164.127
33	10.167.164.128/30	10.167.164.129 – 10.167.164.130	10.167.164.131
34	10.167.164.132/30	10.167.164.133 – 10.167.164.134	10.167.164.135
35	10.167.164.136/30	10.167.164.137 – 10.167.164.138	10.167.164.139
36	10.167.164.140/30	10.167.164.141 – 10.167.164.142	10.167.164.143
37	10.167.164.144/30	10.167.164.145 – 10.167.164.146	10.167.164.147
38	10.167.164.148/30	10.167.164.149 – 10.167.164.150	10.167.164.151
39	10.167.164.152/30	10.167.164.153 – 10.167.164.154	10.167.164.155
40	10.167.164.156/30	10.167.164.157 – 10.167.164.158	10.167.164.159
41	10.167.164.160/30	10.167.164.161 – 10.167.164.162	10.167.164.163
42	10.167.164.164/30	10.167.164.165 – 10.167.164.166	10.167.164.167
43	10.167.164.168/30	10.167.164.169 – 10.167.164.170	10.167.164.171
44	10.167.164.172/30	10.167.164.173 – 10.167.164.174	10.167.164.175
45	10.167.164.176/30	10.167.164.177 – 10.167.164.178	10.167.164.179
46	10.167.164.180/30	10.167.164.181 – 10.167.164.182	10.167.164.183
47	10.167.164.184/30	10.167.164.185 – 10.167.164.186	10.167.164.187
48	10.167.164.188/30	10.167.164.189 – 10.167.164.190	10.167.164.191
49	10.167.164.192/30	10.167.164.193 – 10.167.164.194	10.167.164.195
50	10.167.164.196/30	10.167.164.197 – 10.167.164.198	10.167.164.199
51	10.167.164.200/30	10.167.164.201 – 10.167.164.202	10.167.164.203
52	10.167.164.204/30	10.167.164.205 – 10.167.164.206	10.167.164.207
53	10.167.164.208/30	10.167.164.209 – 10.167.164.210	10.167.164.211
54	10.167.164.212/30	10.167.164.213 – 10.167.164.214	10.167.164.215
55	10.167.164.216/30	10.167.164.217 – 10.167.164.218	10.167.164.219
56	10.167.164.220/30	10.167.164.221 – 10.167.164.222	10.167.164.223
57	10.167.164.224/30	10.167.164.225 – 10.167.164.226	10.167.164.227
58	10.167.164.228/30	10.167.164.229 – 10.167.164.230	10.167.164.231
59	10.167.164.232/30	10.167.164.233 – 10.167.164.234	10.167.164.235
60	10.167.164.236/30	10.167.164.237 – 10.167.164.238	10.167.164.239
61	10.167.164.240/30	10.167.164.241 – 10.167.164.242	10.167.164.243
62	10.167.164.244/30	10.167.164.245 – 10.167.164.246	10.167.164.247
63	10.167.164.248/30	10.167.164.249 – 10.167.164.250	10.167.164.251
64	10.167.164.252/30	10.167.164.253 – 10.167.164.254	10.167.164.255
65	10.167.165.0/30	10.167.165.1 – 10.167.165.2	10.167.165.3
66	10.167.165.4/30	10.167.165.5 – 10.167.165.6	10.167.165.7
67	10.167.165.8/30	10.167.165.9 – 10.167.165.10	10.167.165.11
68	10.167.165.12/30	10.167.165.13 – 10.167.165.14	10.167.165.15
69	10.167.165.16/30	10.167.165.17 – 10.167.165.18	10.167.165.19
70	10.167.165.20/30	10.167.165.21 – 10.167.165.22	10.167.165.23
71	10.167.165.24/30	10.167.165.25 – 10.167.165.26	10.167.165.27
72	10.167.165.28/30	10.167.165.29 – 10.167.165.30	10.167.165.31
73	10.167.165.32/30	10.167.165.33 – 10.167.165.34	10.167.165.35
74	10.167.165.36/30	10.167.165.37 – 10.167.165.38	10.167.165.39
75	10.167.165.40/30	10.167.165.41 – 10.167.165.42	10.167.165.43
76	10.167.165.44/30	10.167.165.45 – 10.167.165.46	10.167.165.47
77	10.167.165.48/30	10.167.165.49 – 10.167.165.50	10.167.165.51
78	10.167.165.52/30	10.167.165.53 – 10.167.165.54	10.167.165.55
79	10.167.165.56/30	10.167.165.57 – 10.167.165.58	10.167.165.59
80	10.167.165.60/30	10.167.165.61 – 10.167.165.62	10.167.165.63
81	10.167.165.64/30	10.167.165.65 – 10.167.165.66	10.167.165.67
82	10.167.165.68/30	10.167.165.69 – 10.167.165.70	10.167.165.71
83	10.167.165.72/30	10.167.165.73 – 10.167.165.74	10.167.165.75
84	10.167.165.76/30	10.167.165.77 – 10.167.165.78	10.167.165.79
85	10.167.165.80/30	10.167.165.81 – 10.167.165.82	10.167.165.83
86	10.167.165.84/30	10.167.165.85 – 10.167.165.86	10.167.165.87
87	10.167.165.88/30	10.167.165.89 – 10.167.165.90	10.167.165.91
88	10.167.165.92/30	10.167.165.93 – 10.167.165.94	10.167.165.95
89	10.167.165.96/30	10.167.165.97 – 10.167.165.98	10.167.165.99
90	10.167.165.100/30	10.167.165.101 – 10.167.165.102	10.167.165.103
91	10.167.165.104/30	10.167.165.105 – 10.167.165.106	10.167.165.107
92	10.167.165.108/30	10.167.165.109 – 10.167.165.110	10.167.165.111
93	10.167.165.112/30	10.167.165.113 – 10.167.165.114	10.167.165.115
94	10.167.165.116/30	10.167.165.117 – 10.167.165.118	10.167.165.119
95	10.167.165.120/30	10.167.165.121 – 10.167.165.122	10.167.165.123
96	10.167.165.124/30	10.167.165.125 – 10.167.165.126	10.167.165.127
97	10.167.165.128/30	10.167.165.129 – 10.167.165.130	10.167.165.131
98	10.167.165.132/30	10.167.165.133 – 10.167.165.134	10.167.165.135
99	10.167.165.136/30	10.167.165.137 – 10.167.165.138	10.167.165.139
100	10.167.165.140/30	10.167.165.141 – 10.167.165.142	10.167.165.143
101	10.167.165.144/30	10.167.165.145 – 10.167.165.146	10.167.165.147
102	10.167.165.148/30	10.167.165.149 – 10.167.165.150	10.167.165.151
103	10.167.165.152/30	10.167.165.153 – 10.167.165.154	10.167.165.155
104	10.167.165.156/30	10.167.165.157 – 10.167.165.158	10.167.165.159
105	10.167.165.160/30	10.167.165.161 – 10.167.165.162	10.167.165.163
106	10.167.165.164/30	10.167.165.165 – 10.167.165.166	10.167.165.167
107	10.167.165.168/30	10.167.165.169 – 10.167.165.170	10.167.165.171
108	10.167.165.172/30	10.167.165.173 – 10.167.165.174	10.167.165.175
109	10.167.165.176/30	10.167.165.177 – 10.167.165.178	10.167.165.179
110	10.167.165.180/30	10.167.165.181 – 10.167.165.182	10.167.165.183
111	10.167.165.184/30	10.167.165.185 – 10.167.165.186	10.167.165.187
112	10.167.165.188/30	10.167.165.189 – 10.167.165.190	10.167.165.191
113	10.167.165.192/30	10.167.165.193 – 10.167.165.194	10.167.165.195
114	10.167.165.196/30	10.167.165.197 – 10.167.165.198	10.167.165.199
115	10.167.165.200/30	10.167.165.201 – 10.167.165.202	10.167.165.203
116	10.167.165.204/30	10.167.165.205 – 10.167.165.206	10.167.165.207
117	10.167.165.208/30	10.167.165.209 – 10.167.165.210	10.167.165.211
118	10.167.165.212/30	10.167.165.213 – 10.167.165.214	10.167.165.215
119	10.167.165.216/30	10.167.165.217 – 10.167.165.218	10.167.165.219
120	10.167.165.220/30	10.167.165.221 – 10.167.165.222	10.167.165.223
121	10.167.165.224/30	10.167.165.225 – 10.167.165.226	10.167.165.227
122	10.167.165.228/30	10.167.165.229 – 10.167.165.230	10.167.165.231
123	10.167.165.232/30	10.167.165.233 – 10.167.165.234	10.167.165.235
124	10.167.165.236/30	10.167.165.237 – 10.167.165.238	10.167.165.239
125	10.167.165.240/30	10.167.165.241 – 10.167.165.242	10.167.165.243
126	10.167.165.244/30	10.167.165.245 – 10.167.165.246	10.167.165.247
127	10.167.165.248/30	10.167.165.249 – 10.167.165.250	10.167.165.251
128	10.167.165.252/30	10.167.165.253 – 10.167.165.254	10.167.165.255

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 /23
/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	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →