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)10.167.196.0/23

network10.167.196.0/23

broadcast10.167.197.255

first host10.167.196.1

last host10.167.197.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.196.0/23

address00001010.10100111.11000100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.11000100.00000000

broadcast00001010.10100111.11000101.11111111

green = network part, grey = host part

hex0x0aa7c400

decimal178766848

reverse dns0.196.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:c400

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.196.0/30	10.167.196.1 – 10.167.196.2	10.167.196.3
2	10.167.196.4/30	10.167.196.5 – 10.167.196.6	10.167.196.7
3	10.167.196.8/30	10.167.196.9 – 10.167.196.10	10.167.196.11
4	10.167.196.12/30	10.167.196.13 – 10.167.196.14	10.167.196.15
5	10.167.196.16/30	10.167.196.17 – 10.167.196.18	10.167.196.19
6	10.167.196.20/30	10.167.196.21 – 10.167.196.22	10.167.196.23
7	10.167.196.24/30	10.167.196.25 – 10.167.196.26	10.167.196.27
8	10.167.196.28/30	10.167.196.29 – 10.167.196.30	10.167.196.31
9	10.167.196.32/30	10.167.196.33 – 10.167.196.34	10.167.196.35
10	10.167.196.36/30	10.167.196.37 – 10.167.196.38	10.167.196.39
11	10.167.196.40/30	10.167.196.41 – 10.167.196.42	10.167.196.43
12	10.167.196.44/30	10.167.196.45 – 10.167.196.46	10.167.196.47
13	10.167.196.48/30	10.167.196.49 – 10.167.196.50	10.167.196.51
14	10.167.196.52/30	10.167.196.53 – 10.167.196.54	10.167.196.55
15	10.167.196.56/30	10.167.196.57 – 10.167.196.58	10.167.196.59
16	10.167.196.60/30	10.167.196.61 – 10.167.196.62	10.167.196.63
17	10.167.196.64/30	10.167.196.65 – 10.167.196.66	10.167.196.67
18	10.167.196.68/30	10.167.196.69 – 10.167.196.70	10.167.196.71
19	10.167.196.72/30	10.167.196.73 – 10.167.196.74	10.167.196.75
20	10.167.196.76/30	10.167.196.77 – 10.167.196.78	10.167.196.79
21	10.167.196.80/30	10.167.196.81 – 10.167.196.82	10.167.196.83
22	10.167.196.84/30	10.167.196.85 – 10.167.196.86	10.167.196.87
23	10.167.196.88/30	10.167.196.89 – 10.167.196.90	10.167.196.91
24	10.167.196.92/30	10.167.196.93 – 10.167.196.94	10.167.196.95
25	10.167.196.96/30	10.167.196.97 – 10.167.196.98	10.167.196.99
26	10.167.196.100/30	10.167.196.101 – 10.167.196.102	10.167.196.103
27	10.167.196.104/30	10.167.196.105 – 10.167.196.106	10.167.196.107
28	10.167.196.108/30	10.167.196.109 – 10.167.196.110	10.167.196.111
29	10.167.196.112/30	10.167.196.113 – 10.167.196.114	10.167.196.115
30	10.167.196.116/30	10.167.196.117 – 10.167.196.118	10.167.196.119
31	10.167.196.120/30	10.167.196.121 – 10.167.196.122	10.167.196.123
32	10.167.196.124/30	10.167.196.125 – 10.167.196.126	10.167.196.127
33	10.167.196.128/30	10.167.196.129 – 10.167.196.130	10.167.196.131
34	10.167.196.132/30	10.167.196.133 – 10.167.196.134	10.167.196.135
35	10.167.196.136/30	10.167.196.137 – 10.167.196.138	10.167.196.139
36	10.167.196.140/30	10.167.196.141 – 10.167.196.142	10.167.196.143
37	10.167.196.144/30	10.167.196.145 – 10.167.196.146	10.167.196.147
38	10.167.196.148/30	10.167.196.149 – 10.167.196.150	10.167.196.151
39	10.167.196.152/30	10.167.196.153 – 10.167.196.154	10.167.196.155
40	10.167.196.156/30	10.167.196.157 – 10.167.196.158	10.167.196.159
41	10.167.196.160/30	10.167.196.161 – 10.167.196.162	10.167.196.163
42	10.167.196.164/30	10.167.196.165 – 10.167.196.166	10.167.196.167
43	10.167.196.168/30	10.167.196.169 – 10.167.196.170	10.167.196.171
44	10.167.196.172/30	10.167.196.173 – 10.167.196.174	10.167.196.175
45	10.167.196.176/30	10.167.196.177 – 10.167.196.178	10.167.196.179
46	10.167.196.180/30	10.167.196.181 – 10.167.196.182	10.167.196.183
47	10.167.196.184/30	10.167.196.185 – 10.167.196.186	10.167.196.187
48	10.167.196.188/30	10.167.196.189 – 10.167.196.190	10.167.196.191
49	10.167.196.192/30	10.167.196.193 – 10.167.196.194	10.167.196.195
50	10.167.196.196/30	10.167.196.197 – 10.167.196.198	10.167.196.199
51	10.167.196.200/30	10.167.196.201 – 10.167.196.202	10.167.196.203
52	10.167.196.204/30	10.167.196.205 – 10.167.196.206	10.167.196.207
53	10.167.196.208/30	10.167.196.209 – 10.167.196.210	10.167.196.211
54	10.167.196.212/30	10.167.196.213 – 10.167.196.214	10.167.196.215
55	10.167.196.216/30	10.167.196.217 – 10.167.196.218	10.167.196.219
56	10.167.196.220/30	10.167.196.221 – 10.167.196.222	10.167.196.223
57	10.167.196.224/30	10.167.196.225 – 10.167.196.226	10.167.196.227
58	10.167.196.228/30	10.167.196.229 – 10.167.196.230	10.167.196.231
59	10.167.196.232/30	10.167.196.233 – 10.167.196.234	10.167.196.235
60	10.167.196.236/30	10.167.196.237 – 10.167.196.238	10.167.196.239
61	10.167.196.240/30	10.167.196.241 – 10.167.196.242	10.167.196.243
62	10.167.196.244/30	10.167.196.245 – 10.167.196.246	10.167.196.247
63	10.167.196.248/30	10.167.196.249 – 10.167.196.250	10.167.196.251
64	10.167.196.252/30	10.167.196.253 – 10.167.196.254	10.167.196.255
65	10.167.197.0/30	10.167.197.1 – 10.167.197.2	10.167.197.3
66	10.167.197.4/30	10.167.197.5 – 10.167.197.6	10.167.197.7
67	10.167.197.8/30	10.167.197.9 – 10.167.197.10	10.167.197.11
68	10.167.197.12/30	10.167.197.13 – 10.167.197.14	10.167.197.15
69	10.167.197.16/30	10.167.197.17 – 10.167.197.18	10.167.197.19
70	10.167.197.20/30	10.167.197.21 – 10.167.197.22	10.167.197.23
71	10.167.197.24/30	10.167.197.25 – 10.167.197.26	10.167.197.27
72	10.167.197.28/30	10.167.197.29 – 10.167.197.30	10.167.197.31
73	10.167.197.32/30	10.167.197.33 – 10.167.197.34	10.167.197.35
74	10.167.197.36/30	10.167.197.37 – 10.167.197.38	10.167.197.39
75	10.167.197.40/30	10.167.197.41 – 10.167.197.42	10.167.197.43
76	10.167.197.44/30	10.167.197.45 – 10.167.197.46	10.167.197.47
77	10.167.197.48/30	10.167.197.49 – 10.167.197.50	10.167.197.51
78	10.167.197.52/30	10.167.197.53 – 10.167.197.54	10.167.197.55
79	10.167.197.56/30	10.167.197.57 – 10.167.197.58	10.167.197.59
80	10.167.197.60/30	10.167.197.61 – 10.167.197.62	10.167.197.63
81	10.167.197.64/30	10.167.197.65 – 10.167.197.66	10.167.197.67
82	10.167.197.68/30	10.167.197.69 – 10.167.197.70	10.167.197.71
83	10.167.197.72/30	10.167.197.73 – 10.167.197.74	10.167.197.75
84	10.167.197.76/30	10.167.197.77 – 10.167.197.78	10.167.197.79
85	10.167.197.80/30	10.167.197.81 – 10.167.197.82	10.167.197.83
86	10.167.197.84/30	10.167.197.85 – 10.167.197.86	10.167.197.87
87	10.167.197.88/30	10.167.197.89 – 10.167.197.90	10.167.197.91
88	10.167.197.92/30	10.167.197.93 – 10.167.197.94	10.167.197.95
89	10.167.197.96/30	10.167.197.97 – 10.167.197.98	10.167.197.99
90	10.167.197.100/30	10.167.197.101 – 10.167.197.102	10.167.197.103
91	10.167.197.104/30	10.167.197.105 – 10.167.197.106	10.167.197.107
92	10.167.197.108/30	10.167.197.109 – 10.167.197.110	10.167.197.111
93	10.167.197.112/30	10.167.197.113 – 10.167.197.114	10.167.197.115
94	10.167.197.116/30	10.167.197.117 – 10.167.197.118	10.167.197.119
95	10.167.197.120/30	10.167.197.121 – 10.167.197.122	10.167.197.123
96	10.167.197.124/30	10.167.197.125 – 10.167.197.126	10.167.197.127
97	10.167.197.128/30	10.167.197.129 – 10.167.197.130	10.167.197.131
98	10.167.197.132/30	10.167.197.133 – 10.167.197.134	10.167.197.135
99	10.167.197.136/30	10.167.197.137 – 10.167.197.138	10.167.197.139
100	10.167.197.140/30	10.167.197.141 – 10.167.197.142	10.167.197.143
101	10.167.197.144/30	10.167.197.145 – 10.167.197.146	10.167.197.147
102	10.167.197.148/30	10.167.197.149 – 10.167.197.150	10.167.197.151
103	10.167.197.152/30	10.167.197.153 – 10.167.197.154	10.167.197.155
104	10.167.197.156/30	10.167.197.157 – 10.167.197.158	10.167.197.159
105	10.167.197.160/30	10.167.197.161 – 10.167.197.162	10.167.197.163
106	10.167.197.164/30	10.167.197.165 – 10.167.197.166	10.167.197.167
107	10.167.197.168/30	10.167.197.169 – 10.167.197.170	10.167.197.171
108	10.167.197.172/30	10.167.197.173 – 10.167.197.174	10.167.197.175
109	10.167.197.176/30	10.167.197.177 – 10.167.197.178	10.167.197.179
110	10.167.197.180/30	10.167.197.181 – 10.167.197.182	10.167.197.183
111	10.167.197.184/30	10.167.197.185 – 10.167.197.186	10.167.197.187
112	10.167.197.188/30	10.167.197.189 – 10.167.197.190	10.167.197.191
113	10.167.197.192/30	10.167.197.193 – 10.167.197.194	10.167.197.195
114	10.167.197.196/30	10.167.197.197 – 10.167.197.198	10.167.197.199
115	10.167.197.200/30	10.167.197.201 – 10.167.197.202	10.167.197.203
116	10.167.197.204/30	10.167.197.205 – 10.167.197.206	10.167.197.207
117	10.167.197.208/30	10.167.197.209 – 10.167.197.210	10.167.197.211
118	10.167.197.212/30	10.167.197.213 – 10.167.197.214	10.167.197.215
119	10.167.197.216/30	10.167.197.217 – 10.167.197.218	10.167.197.219
120	10.167.197.220/30	10.167.197.221 – 10.167.197.222	10.167.197.223
121	10.167.197.224/30	10.167.197.225 – 10.167.197.226	10.167.197.227
122	10.167.197.228/30	10.167.197.229 – 10.167.197.230	10.167.197.231
123	10.167.197.232/30	10.167.197.233 – 10.167.197.234	10.167.197.235
124	10.167.197.236/30	10.167.197.237 – 10.167.197.238	10.167.197.239
125	10.167.197.240/30	10.167.197.241 – 10.167.197.242	10.167.197.243
126	10.167.197.244/30	10.167.197.245 – 10.167.197.246	10.167.197.247
127	10.167.197.248/30	10.167.197.249 – 10.167.197.250	10.167.197.251
128	10.167.197.252/30	10.167.197.253 – 10.167.197.254	10.167.197.255

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 →