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)10.167.130.0/23

network10.167.130.0/23

broadcast10.167.131.255

first host10.167.130.1

last host10.167.131.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.130.0/23

address00001010.10100111.10000010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.10000010.00000000

broadcast00001010.10100111.10000011.11111111

green = network part, grey = host part

hex0x0aa78200

decimal178749952

reverse dns0.130.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:8200

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.130.0/30	10.167.130.1 – 10.167.130.2	10.167.130.3
2	10.167.130.4/30	10.167.130.5 – 10.167.130.6	10.167.130.7
3	10.167.130.8/30	10.167.130.9 – 10.167.130.10	10.167.130.11
4	10.167.130.12/30	10.167.130.13 – 10.167.130.14	10.167.130.15
5	10.167.130.16/30	10.167.130.17 – 10.167.130.18	10.167.130.19
6	10.167.130.20/30	10.167.130.21 – 10.167.130.22	10.167.130.23
7	10.167.130.24/30	10.167.130.25 – 10.167.130.26	10.167.130.27
8	10.167.130.28/30	10.167.130.29 – 10.167.130.30	10.167.130.31
9	10.167.130.32/30	10.167.130.33 – 10.167.130.34	10.167.130.35
10	10.167.130.36/30	10.167.130.37 – 10.167.130.38	10.167.130.39
11	10.167.130.40/30	10.167.130.41 – 10.167.130.42	10.167.130.43
12	10.167.130.44/30	10.167.130.45 – 10.167.130.46	10.167.130.47
13	10.167.130.48/30	10.167.130.49 – 10.167.130.50	10.167.130.51
14	10.167.130.52/30	10.167.130.53 – 10.167.130.54	10.167.130.55
15	10.167.130.56/30	10.167.130.57 – 10.167.130.58	10.167.130.59
16	10.167.130.60/30	10.167.130.61 – 10.167.130.62	10.167.130.63
17	10.167.130.64/30	10.167.130.65 – 10.167.130.66	10.167.130.67
18	10.167.130.68/30	10.167.130.69 – 10.167.130.70	10.167.130.71
19	10.167.130.72/30	10.167.130.73 – 10.167.130.74	10.167.130.75
20	10.167.130.76/30	10.167.130.77 – 10.167.130.78	10.167.130.79
21	10.167.130.80/30	10.167.130.81 – 10.167.130.82	10.167.130.83
22	10.167.130.84/30	10.167.130.85 – 10.167.130.86	10.167.130.87
23	10.167.130.88/30	10.167.130.89 – 10.167.130.90	10.167.130.91
24	10.167.130.92/30	10.167.130.93 – 10.167.130.94	10.167.130.95
25	10.167.130.96/30	10.167.130.97 – 10.167.130.98	10.167.130.99
26	10.167.130.100/30	10.167.130.101 – 10.167.130.102	10.167.130.103
27	10.167.130.104/30	10.167.130.105 – 10.167.130.106	10.167.130.107
28	10.167.130.108/30	10.167.130.109 – 10.167.130.110	10.167.130.111
29	10.167.130.112/30	10.167.130.113 – 10.167.130.114	10.167.130.115
30	10.167.130.116/30	10.167.130.117 – 10.167.130.118	10.167.130.119
31	10.167.130.120/30	10.167.130.121 – 10.167.130.122	10.167.130.123
32	10.167.130.124/30	10.167.130.125 – 10.167.130.126	10.167.130.127
33	10.167.130.128/30	10.167.130.129 – 10.167.130.130	10.167.130.131
34	10.167.130.132/30	10.167.130.133 – 10.167.130.134	10.167.130.135
35	10.167.130.136/30	10.167.130.137 – 10.167.130.138	10.167.130.139
36	10.167.130.140/30	10.167.130.141 – 10.167.130.142	10.167.130.143
37	10.167.130.144/30	10.167.130.145 – 10.167.130.146	10.167.130.147
38	10.167.130.148/30	10.167.130.149 – 10.167.130.150	10.167.130.151
39	10.167.130.152/30	10.167.130.153 – 10.167.130.154	10.167.130.155
40	10.167.130.156/30	10.167.130.157 – 10.167.130.158	10.167.130.159
41	10.167.130.160/30	10.167.130.161 – 10.167.130.162	10.167.130.163
42	10.167.130.164/30	10.167.130.165 – 10.167.130.166	10.167.130.167
43	10.167.130.168/30	10.167.130.169 – 10.167.130.170	10.167.130.171
44	10.167.130.172/30	10.167.130.173 – 10.167.130.174	10.167.130.175
45	10.167.130.176/30	10.167.130.177 – 10.167.130.178	10.167.130.179
46	10.167.130.180/30	10.167.130.181 – 10.167.130.182	10.167.130.183
47	10.167.130.184/30	10.167.130.185 – 10.167.130.186	10.167.130.187
48	10.167.130.188/30	10.167.130.189 – 10.167.130.190	10.167.130.191
49	10.167.130.192/30	10.167.130.193 – 10.167.130.194	10.167.130.195
50	10.167.130.196/30	10.167.130.197 – 10.167.130.198	10.167.130.199
51	10.167.130.200/30	10.167.130.201 – 10.167.130.202	10.167.130.203
52	10.167.130.204/30	10.167.130.205 – 10.167.130.206	10.167.130.207
53	10.167.130.208/30	10.167.130.209 – 10.167.130.210	10.167.130.211
54	10.167.130.212/30	10.167.130.213 – 10.167.130.214	10.167.130.215
55	10.167.130.216/30	10.167.130.217 – 10.167.130.218	10.167.130.219
56	10.167.130.220/30	10.167.130.221 – 10.167.130.222	10.167.130.223
57	10.167.130.224/30	10.167.130.225 – 10.167.130.226	10.167.130.227
58	10.167.130.228/30	10.167.130.229 – 10.167.130.230	10.167.130.231
59	10.167.130.232/30	10.167.130.233 – 10.167.130.234	10.167.130.235
60	10.167.130.236/30	10.167.130.237 – 10.167.130.238	10.167.130.239
61	10.167.130.240/30	10.167.130.241 – 10.167.130.242	10.167.130.243
62	10.167.130.244/30	10.167.130.245 – 10.167.130.246	10.167.130.247
63	10.167.130.248/30	10.167.130.249 – 10.167.130.250	10.167.130.251
64	10.167.130.252/30	10.167.130.253 – 10.167.130.254	10.167.130.255
65	10.167.131.0/30	10.167.131.1 – 10.167.131.2	10.167.131.3
66	10.167.131.4/30	10.167.131.5 – 10.167.131.6	10.167.131.7
67	10.167.131.8/30	10.167.131.9 – 10.167.131.10	10.167.131.11
68	10.167.131.12/30	10.167.131.13 – 10.167.131.14	10.167.131.15
69	10.167.131.16/30	10.167.131.17 – 10.167.131.18	10.167.131.19
70	10.167.131.20/30	10.167.131.21 – 10.167.131.22	10.167.131.23
71	10.167.131.24/30	10.167.131.25 – 10.167.131.26	10.167.131.27
72	10.167.131.28/30	10.167.131.29 – 10.167.131.30	10.167.131.31
73	10.167.131.32/30	10.167.131.33 – 10.167.131.34	10.167.131.35
74	10.167.131.36/30	10.167.131.37 – 10.167.131.38	10.167.131.39
75	10.167.131.40/30	10.167.131.41 – 10.167.131.42	10.167.131.43
76	10.167.131.44/30	10.167.131.45 – 10.167.131.46	10.167.131.47
77	10.167.131.48/30	10.167.131.49 – 10.167.131.50	10.167.131.51
78	10.167.131.52/30	10.167.131.53 – 10.167.131.54	10.167.131.55
79	10.167.131.56/30	10.167.131.57 – 10.167.131.58	10.167.131.59
80	10.167.131.60/30	10.167.131.61 – 10.167.131.62	10.167.131.63
81	10.167.131.64/30	10.167.131.65 – 10.167.131.66	10.167.131.67
82	10.167.131.68/30	10.167.131.69 – 10.167.131.70	10.167.131.71
83	10.167.131.72/30	10.167.131.73 – 10.167.131.74	10.167.131.75
84	10.167.131.76/30	10.167.131.77 – 10.167.131.78	10.167.131.79
85	10.167.131.80/30	10.167.131.81 – 10.167.131.82	10.167.131.83
86	10.167.131.84/30	10.167.131.85 – 10.167.131.86	10.167.131.87
87	10.167.131.88/30	10.167.131.89 – 10.167.131.90	10.167.131.91
88	10.167.131.92/30	10.167.131.93 – 10.167.131.94	10.167.131.95
89	10.167.131.96/30	10.167.131.97 – 10.167.131.98	10.167.131.99
90	10.167.131.100/30	10.167.131.101 – 10.167.131.102	10.167.131.103
91	10.167.131.104/30	10.167.131.105 – 10.167.131.106	10.167.131.107
92	10.167.131.108/30	10.167.131.109 – 10.167.131.110	10.167.131.111
93	10.167.131.112/30	10.167.131.113 – 10.167.131.114	10.167.131.115
94	10.167.131.116/30	10.167.131.117 – 10.167.131.118	10.167.131.119
95	10.167.131.120/30	10.167.131.121 – 10.167.131.122	10.167.131.123
96	10.167.131.124/30	10.167.131.125 – 10.167.131.126	10.167.131.127
97	10.167.131.128/30	10.167.131.129 – 10.167.131.130	10.167.131.131
98	10.167.131.132/30	10.167.131.133 – 10.167.131.134	10.167.131.135
99	10.167.131.136/30	10.167.131.137 – 10.167.131.138	10.167.131.139
100	10.167.131.140/30	10.167.131.141 – 10.167.131.142	10.167.131.143
101	10.167.131.144/30	10.167.131.145 – 10.167.131.146	10.167.131.147
102	10.167.131.148/30	10.167.131.149 – 10.167.131.150	10.167.131.151
103	10.167.131.152/30	10.167.131.153 – 10.167.131.154	10.167.131.155
104	10.167.131.156/30	10.167.131.157 – 10.167.131.158	10.167.131.159
105	10.167.131.160/30	10.167.131.161 – 10.167.131.162	10.167.131.163
106	10.167.131.164/30	10.167.131.165 – 10.167.131.166	10.167.131.167
107	10.167.131.168/30	10.167.131.169 – 10.167.131.170	10.167.131.171
108	10.167.131.172/30	10.167.131.173 – 10.167.131.174	10.167.131.175
109	10.167.131.176/30	10.167.131.177 – 10.167.131.178	10.167.131.179
110	10.167.131.180/30	10.167.131.181 – 10.167.131.182	10.167.131.183
111	10.167.131.184/30	10.167.131.185 – 10.167.131.186	10.167.131.187
112	10.167.131.188/30	10.167.131.189 – 10.167.131.190	10.167.131.191
113	10.167.131.192/30	10.167.131.193 – 10.167.131.194	10.167.131.195
114	10.167.131.196/30	10.167.131.197 – 10.167.131.198	10.167.131.199
115	10.167.131.200/30	10.167.131.201 – 10.167.131.202	10.167.131.203
116	10.167.131.204/30	10.167.131.205 – 10.167.131.206	10.167.131.207
117	10.167.131.208/30	10.167.131.209 – 10.167.131.210	10.167.131.211
118	10.167.131.212/30	10.167.131.213 – 10.167.131.214	10.167.131.215
119	10.167.131.216/30	10.167.131.217 – 10.167.131.218	10.167.131.219
120	10.167.131.220/30	10.167.131.221 – 10.167.131.222	10.167.131.223
121	10.167.131.224/30	10.167.131.225 – 10.167.131.226	10.167.131.227
122	10.167.131.228/30	10.167.131.229 – 10.167.131.230	10.167.131.231
123	10.167.131.232/30	10.167.131.233 – 10.167.131.234	10.167.131.235
124	10.167.131.236/30	10.167.131.237 – 10.167.131.238	10.167.131.239
125	10.167.131.240/30	10.167.131.241 – 10.167.131.242	10.167.131.243
126	10.167.131.244/30	10.167.131.245 – 10.167.131.246	10.167.131.247
127	10.167.131.248/30	10.167.131.249 – 10.167.131.250	10.167.131.251
128	10.167.131.252/30	10.167.131.253 – 10.167.131.254	10.167.131.255

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 →