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)10.167.118.0/23

network10.167.118.0/23

broadcast10.167.119.255

first host10.167.118.1

last host10.167.119.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.118.0/23

address00001010.10100111.01110110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.01110110.00000000

broadcast00001010.10100111.01110111.11111111

green = network part, grey = host part

hex0x0aa77600

decimal178746880

reverse dns0.118.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7600

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.118.0/30	10.167.118.1 – 10.167.118.2	10.167.118.3
2	10.167.118.4/30	10.167.118.5 – 10.167.118.6	10.167.118.7
3	10.167.118.8/30	10.167.118.9 – 10.167.118.10	10.167.118.11
4	10.167.118.12/30	10.167.118.13 – 10.167.118.14	10.167.118.15
5	10.167.118.16/30	10.167.118.17 – 10.167.118.18	10.167.118.19
6	10.167.118.20/30	10.167.118.21 – 10.167.118.22	10.167.118.23
7	10.167.118.24/30	10.167.118.25 – 10.167.118.26	10.167.118.27
8	10.167.118.28/30	10.167.118.29 – 10.167.118.30	10.167.118.31
9	10.167.118.32/30	10.167.118.33 – 10.167.118.34	10.167.118.35
10	10.167.118.36/30	10.167.118.37 – 10.167.118.38	10.167.118.39
11	10.167.118.40/30	10.167.118.41 – 10.167.118.42	10.167.118.43
12	10.167.118.44/30	10.167.118.45 – 10.167.118.46	10.167.118.47
13	10.167.118.48/30	10.167.118.49 – 10.167.118.50	10.167.118.51
14	10.167.118.52/30	10.167.118.53 – 10.167.118.54	10.167.118.55
15	10.167.118.56/30	10.167.118.57 – 10.167.118.58	10.167.118.59
16	10.167.118.60/30	10.167.118.61 – 10.167.118.62	10.167.118.63
17	10.167.118.64/30	10.167.118.65 – 10.167.118.66	10.167.118.67
18	10.167.118.68/30	10.167.118.69 – 10.167.118.70	10.167.118.71
19	10.167.118.72/30	10.167.118.73 – 10.167.118.74	10.167.118.75
20	10.167.118.76/30	10.167.118.77 – 10.167.118.78	10.167.118.79
21	10.167.118.80/30	10.167.118.81 – 10.167.118.82	10.167.118.83
22	10.167.118.84/30	10.167.118.85 – 10.167.118.86	10.167.118.87
23	10.167.118.88/30	10.167.118.89 – 10.167.118.90	10.167.118.91
24	10.167.118.92/30	10.167.118.93 – 10.167.118.94	10.167.118.95
25	10.167.118.96/30	10.167.118.97 – 10.167.118.98	10.167.118.99
26	10.167.118.100/30	10.167.118.101 – 10.167.118.102	10.167.118.103
27	10.167.118.104/30	10.167.118.105 – 10.167.118.106	10.167.118.107
28	10.167.118.108/30	10.167.118.109 – 10.167.118.110	10.167.118.111
29	10.167.118.112/30	10.167.118.113 – 10.167.118.114	10.167.118.115
30	10.167.118.116/30	10.167.118.117 – 10.167.118.118	10.167.118.119
31	10.167.118.120/30	10.167.118.121 – 10.167.118.122	10.167.118.123
32	10.167.118.124/30	10.167.118.125 – 10.167.118.126	10.167.118.127
33	10.167.118.128/30	10.167.118.129 – 10.167.118.130	10.167.118.131
34	10.167.118.132/30	10.167.118.133 – 10.167.118.134	10.167.118.135
35	10.167.118.136/30	10.167.118.137 – 10.167.118.138	10.167.118.139
36	10.167.118.140/30	10.167.118.141 – 10.167.118.142	10.167.118.143
37	10.167.118.144/30	10.167.118.145 – 10.167.118.146	10.167.118.147
38	10.167.118.148/30	10.167.118.149 – 10.167.118.150	10.167.118.151
39	10.167.118.152/30	10.167.118.153 – 10.167.118.154	10.167.118.155
40	10.167.118.156/30	10.167.118.157 – 10.167.118.158	10.167.118.159
41	10.167.118.160/30	10.167.118.161 – 10.167.118.162	10.167.118.163
42	10.167.118.164/30	10.167.118.165 – 10.167.118.166	10.167.118.167
43	10.167.118.168/30	10.167.118.169 – 10.167.118.170	10.167.118.171
44	10.167.118.172/30	10.167.118.173 – 10.167.118.174	10.167.118.175
45	10.167.118.176/30	10.167.118.177 – 10.167.118.178	10.167.118.179
46	10.167.118.180/30	10.167.118.181 – 10.167.118.182	10.167.118.183
47	10.167.118.184/30	10.167.118.185 – 10.167.118.186	10.167.118.187
48	10.167.118.188/30	10.167.118.189 – 10.167.118.190	10.167.118.191
49	10.167.118.192/30	10.167.118.193 – 10.167.118.194	10.167.118.195
50	10.167.118.196/30	10.167.118.197 – 10.167.118.198	10.167.118.199
51	10.167.118.200/30	10.167.118.201 – 10.167.118.202	10.167.118.203
52	10.167.118.204/30	10.167.118.205 – 10.167.118.206	10.167.118.207
53	10.167.118.208/30	10.167.118.209 – 10.167.118.210	10.167.118.211
54	10.167.118.212/30	10.167.118.213 – 10.167.118.214	10.167.118.215
55	10.167.118.216/30	10.167.118.217 – 10.167.118.218	10.167.118.219
56	10.167.118.220/30	10.167.118.221 – 10.167.118.222	10.167.118.223
57	10.167.118.224/30	10.167.118.225 – 10.167.118.226	10.167.118.227
58	10.167.118.228/30	10.167.118.229 – 10.167.118.230	10.167.118.231
59	10.167.118.232/30	10.167.118.233 – 10.167.118.234	10.167.118.235
60	10.167.118.236/30	10.167.118.237 – 10.167.118.238	10.167.118.239
61	10.167.118.240/30	10.167.118.241 – 10.167.118.242	10.167.118.243
62	10.167.118.244/30	10.167.118.245 – 10.167.118.246	10.167.118.247
63	10.167.118.248/30	10.167.118.249 – 10.167.118.250	10.167.118.251
64	10.167.118.252/30	10.167.118.253 – 10.167.118.254	10.167.118.255
65	10.167.119.0/30	10.167.119.1 – 10.167.119.2	10.167.119.3
66	10.167.119.4/30	10.167.119.5 – 10.167.119.6	10.167.119.7
67	10.167.119.8/30	10.167.119.9 – 10.167.119.10	10.167.119.11
68	10.167.119.12/30	10.167.119.13 – 10.167.119.14	10.167.119.15
69	10.167.119.16/30	10.167.119.17 – 10.167.119.18	10.167.119.19
70	10.167.119.20/30	10.167.119.21 – 10.167.119.22	10.167.119.23
71	10.167.119.24/30	10.167.119.25 – 10.167.119.26	10.167.119.27
72	10.167.119.28/30	10.167.119.29 – 10.167.119.30	10.167.119.31
73	10.167.119.32/30	10.167.119.33 – 10.167.119.34	10.167.119.35
74	10.167.119.36/30	10.167.119.37 – 10.167.119.38	10.167.119.39
75	10.167.119.40/30	10.167.119.41 – 10.167.119.42	10.167.119.43
76	10.167.119.44/30	10.167.119.45 – 10.167.119.46	10.167.119.47
77	10.167.119.48/30	10.167.119.49 – 10.167.119.50	10.167.119.51
78	10.167.119.52/30	10.167.119.53 – 10.167.119.54	10.167.119.55
79	10.167.119.56/30	10.167.119.57 – 10.167.119.58	10.167.119.59
80	10.167.119.60/30	10.167.119.61 – 10.167.119.62	10.167.119.63
81	10.167.119.64/30	10.167.119.65 – 10.167.119.66	10.167.119.67
82	10.167.119.68/30	10.167.119.69 – 10.167.119.70	10.167.119.71
83	10.167.119.72/30	10.167.119.73 – 10.167.119.74	10.167.119.75
84	10.167.119.76/30	10.167.119.77 – 10.167.119.78	10.167.119.79
85	10.167.119.80/30	10.167.119.81 – 10.167.119.82	10.167.119.83
86	10.167.119.84/30	10.167.119.85 – 10.167.119.86	10.167.119.87
87	10.167.119.88/30	10.167.119.89 – 10.167.119.90	10.167.119.91
88	10.167.119.92/30	10.167.119.93 – 10.167.119.94	10.167.119.95
89	10.167.119.96/30	10.167.119.97 – 10.167.119.98	10.167.119.99
90	10.167.119.100/30	10.167.119.101 – 10.167.119.102	10.167.119.103
91	10.167.119.104/30	10.167.119.105 – 10.167.119.106	10.167.119.107
92	10.167.119.108/30	10.167.119.109 – 10.167.119.110	10.167.119.111
93	10.167.119.112/30	10.167.119.113 – 10.167.119.114	10.167.119.115
94	10.167.119.116/30	10.167.119.117 – 10.167.119.118	10.167.119.119
95	10.167.119.120/30	10.167.119.121 – 10.167.119.122	10.167.119.123
96	10.167.119.124/30	10.167.119.125 – 10.167.119.126	10.167.119.127
97	10.167.119.128/30	10.167.119.129 – 10.167.119.130	10.167.119.131
98	10.167.119.132/30	10.167.119.133 – 10.167.119.134	10.167.119.135
99	10.167.119.136/30	10.167.119.137 – 10.167.119.138	10.167.119.139
100	10.167.119.140/30	10.167.119.141 – 10.167.119.142	10.167.119.143
101	10.167.119.144/30	10.167.119.145 – 10.167.119.146	10.167.119.147
102	10.167.119.148/30	10.167.119.149 – 10.167.119.150	10.167.119.151
103	10.167.119.152/30	10.167.119.153 – 10.167.119.154	10.167.119.155
104	10.167.119.156/30	10.167.119.157 – 10.167.119.158	10.167.119.159
105	10.167.119.160/30	10.167.119.161 – 10.167.119.162	10.167.119.163
106	10.167.119.164/30	10.167.119.165 – 10.167.119.166	10.167.119.167
107	10.167.119.168/30	10.167.119.169 – 10.167.119.170	10.167.119.171
108	10.167.119.172/30	10.167.119.173 – 10.167.119.174	10.167.119.175
109	10.167.119.176/30	10.167.119.177 – 10.167.119.178	10.167.119.179
110	10.167.119.180/30	10.167.119.181 – 10.167.119.182	10.167.119.183
111	10.167.119.184/30	10.167.119.185 – 10.167.119.186	10.167.119.187
112	10.167.119.188/30	10.167.119.189 – 10.167.119.190	10.167.119.191
113	10.167.119.192/30	10.167.119.193 – 10.167.119.194	10.167.119.195
114	10.167.119.196/30	10.167.119.197 – 10.167.119.198	10.167.119.199
115	10.167.119.200/30	10.167.119.201 – 10.167.119.202	10.167.119.203
116	10.167.119.204/30	10.167.119.205 – 10.167.119.206	10.167.119.207
117	10.167.119.208/30	10.167.119.209 – 10.167.119.210	10.167.119.211
118	10.167.119.212/30	10.167.119.213 – 10.167.119.214	10.167.119.215
119	10.167.119.216/30	10.167.119.217 – 10.167.119.218	10.167.119.219
120	10.167.119.220/30	10.167.119.221 – 10.167.119.222	10.167.119.223
121	10.167.119.224/30	10.167.119.225 – 10.167.119.226	10.167.119.227
122	10.167.119.228/30	10.167.119.229 – 10.167.119.230	10.167.119.231
123	10.167.119.232/30	10.167.119.233 – 10.167.119.234	10.167.119.235
124	10.167.119.236/30	10.167.119.237 – 10.167.119.238	10.167.119.239
125	10.167.119.240/30	10.167.119.241 – 10.167.119.242	10.167.119.243
126	10.167.119.244/30	10.167.119.245 – 10.167.119.246	10.167.119.247
127	10.167.119.248/30	10.167.119.249 – 10.167.119.250	10.167.119.251
128	10.167.119.252/30	10.167.119.253 – 10.167.119.254	10.167.119.255

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 →