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)10.166.152.0/23

network10.166.152.0/23

broadcast10.166.153.255

first host10.166.152.1

last host10.166.153.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.166.152.0/23

address00001010.10100110.10011000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100110.10011000.00000000

broadcast00001010.10100110.10011001.11111111

green = network part, grey = host part

hex0x0aa69800

decimal178690048

reverse dns0.152.166.10.in-addr.arpa

ipv4-mapped::ffff:aa6:9800

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.166.152.0/30	10.166.152.1 – 10.166.152.2	10.166.152.3
2	10.166.152.4/30	10.166.152.5 – 10.166.152.6	10.166.152.7
3	10.166.152.8/30	10.166.152.9 – 10.166.152.10	10.166.152.11
4	10.166.152.12/30	10.166.152.13 – 10.166.152.14	10.166.152.15
5	10.166.152.16/30	10.166.152.17 – 10.166.152.18	10.166.152.19
6	10.166.152.20/30	10.166.152.21 – 10.166.152.22	10.166.152.23
7	10.166.152.24/30	10.166.152.25 – 10.166.152.26	10.166.152.27
8	10.166.152.28/30	10.166.152.29 – 10.166.152.30	10.166.152.31
9	10.166.152.32/30	10.166.152.33 – 10.166.152.34	10.166.152.35
10	10.166.152.36/30	10.166.152.37 – 10.166.152.38	10.166.152.39
11	10.166.152.40/30	10.166.152.41 – 10.166.152.42	10.166.152.43
12	10.166.152.44/30	10.166.152.45 – 10.166.152.46	10.166.152.47
13	10.166.152.48/30	10.166.152.49 – 10.166.152.50	10.166.152.51
14	10.166.152.52/30	10.166.152.53 – 10.166.152.54	10.166.152.55
15	10.166.152.56/30	10.166.152.57 – 10.166.152.58	10.166.152.59
16	10.166.152.60/30	10.166.152.61 – 10.166.152.62	10.166.152.63
17	10.166.152.64/30	10.166.152.65 – 10.166.152.66	10.166.152.67
18	10.166.152.68/30	10.166.152.69 – 10.166.152.70	10.166.152.71
19	10.166.152.72/30	10.166.152.73 – 10.166.152.74	10.166.152.75
20	10.166.152.76/30	10.166.152.77 – 10.166.152.78	10.166.152.79
21	10.166.152.80/30	10.166.152.81 – 10.166.152.82	10.166.152.83
22	10.166.152.84/30	10.166.152.85 – 10.166.152.86	10.166.152.87
23	10.166.152.88/30	10.166.152.89 – 10.166.152.90	10.166.152.91
24	10.166.152.92/30	10.166.152.93 – 10.166.152.94	10.166.152.95
25	10.166.152.96/30	10.166.152.97 – 10.166.152.98	10.166.152.99
26	10.166.152.100/30	10.166.152.101 – 10.166.152.102	10.166.152.103
27	10.166.152.104/30	10.166.152.105 – 10.166.152.106	10.166.152.107
28	10.166.152.108/30	10.166.152.109 – 10.166.152.110	10.166.152.111
29	10.166.152.112/30	10.166.152.113 – 10.166.152.114	10.166.152.115
30	10.166.152.116/30	10.166.152.117 – 10.166.152.118	10.166.152.119
31	10.166.152.120/30	10.166.152.121 – 10.166.152.122	10.166.152.123
32	10.166.152.124/30	10.166.152.125 – 10.166.152.126	10.166.152.127
33	10.166.152.128/30	10.166.152.129 – 10.166.152.130	10.166.152.131
34	10.166.152.132/30	10.166.152.133 – 10.166.152.134	10.166.152.135
35	10.166.152.136/30	10.166.152.137 – 10.166.152.138	10.166.152.139
36	10.166.152.140/30	10.166.152.141 – 10.166.152.142	10.166.152.143
37	10.166.152.144/30	10.166.152.145 – 10.166.152.146	10.166.152.147
38	10.166.152.148/30	10.166.152.149 – 10.166.152.150	10.166.152.151
39	10.166.152.152/30	10.166.152.153 – 10.166.152.154	10.166.152.155
40	10.166.152.156/30	10.166.152.157 – 10.166.152.158	10.166.152.159
41	10.166.152.160/30	10.166.152.161 – 10.166.152.162	10.166.152.163
42	10.166.152.164/30	10.166.152.165 – 10.166.152.166	10.166.152.167
43	10.166.152.168/30	10.166.152.169 – 10.166.152.170	10.166.152.171
44	10.166.152.172/30	10.166.152.173 – 10.166.152.174	10.166.152.175
45	10.166.152.176/30	10.166.152.177 – 10.166.152.178	10.166.152.179
46	10.166.152.180/30	10.166.152.181 – 10.166.152.182	10.166.152.183
47	10.166.152.184/30	10.166.152.185 – 10.166.152.186	10.166.152.187
48	10.166.152.188/30	10.166.152.189 – 10.166.152.190	10.166.152.191
49	10.166.152.192/30	10.166.152.193 – 10.166.152.194	10.166.152.195
50	10.166.152.196/30	10.166.152.197 – 10.166.152.198	10.166.152.199
51	10.166.152.200/30	10.166.152.201 – 10.166.152.202	10.166.152.203
52	10.166.152.204/30	10.166.152.205 – 10.166.152.206	10.166.152.207
53	10.166.152.208/30	10.166.152.209 – 10.166.152.210	10.166.152.211
54	10.166.152.212/30	10.166.152.213 – 10.166.152.214	10.166.152.215
55	10.166.152.216/30	10.166.152.217 – 10.166.152.218	10.166.152.219
56	10.166.152.220/30	10.166.152.221 – 10.166.152.222	10.166.152.223
57	10.166.152.224/30	10.166.152.225 – 10.166.152.226	10.166.152.227
58	10.166.152.228/30	10.166.152.229 – 10.166.152.230	10.166.152.231
59	10.166.152.232/30	10.166.152.233 – 10.166.152.234	10.166.152.235
60	10.166.152.236/30	10.166.152.237 – 10.166.152.238	10.166.152.239
61	10.166.152.240/30	10.166.152.241 – 10.166.152.242	10.166.152.243
62	10.166.152.244/30	10.166.152.245 – 10.166.152.246	10.166.152.247
63	10.166.152.248/30	10.166.152.249 – 10.166.152.250	10.166.152.251
64	10.166.152.252/30	10.166.152.253 – 10.166.152.254	10.166.152.255
65	10.166.153.0/30	10.166.153.1 – 10.166.153.2	10.166.153.3
66	10.166.153.4/30	10.166.153.5 – 10.166.153.6	10.166.153.7
67	10.166.153.8/30	10.166.153.9 – 10.166.153.10	10.166.153.11
68	10.166.153.12/30	10.166.153.13 – 10.166.153.14	10.166.153.15
69	10.166.153.16/30	10.166.153.17 – 10.166.153.18	10.166.153.19
70	10.166.153.20/30	10.166.153.21 – 10.166.153.22	10.166.153.23
71	10.166.153.24/30	10.166.153.25 – 10.166.153.26	10.166.153.27
72	10.166.153.28/30	10.166.153.29 – 10.166.153.30	10.166.153.31
73	10.166.153.32/30	10.166.153.33 – 10.166.153.34	10.166.153.35
74	10.166.153.36/30	10.166.153.37 – 10.166.153.38	10.166.153.39
75	10.166.153.40/30	10.166.153.41 – 10.166.153.42	10.166.153.43
76	10.166.153.44/30	10.166.153.45 – 10.166.153.46	10.166.153.47
77	10.166.153.48/30	10.166.153.49 – 10.166.153.50	10.166.153.51
78	10.166.153.52/30	10.166.153.53 – 10.166.153.54	10.166.153.55
79	10.166.153.56/30	10.166.153.57 – 10.166.153.58	10.166.153.59
80	10.166.153.60/30	10.166.153.61 – 10.166.153.62	10.166.153.63
81	10.166.153.64/30	10.166.153.65 – 10.166.153.66	10.166.153.67
82	10.166.153.68/30	10.166.153.69 – 10.166.153.70	10.166.153.71
83	10.166.153.72/30	10.166.153.73 – 10.166.153.74	10.166.153.75
84	10.166.153.76/30	10.166.153.77 – 10.166.153.78	10.166.153.79
85	10.166.153.80/30	10.166.153.81 – 10.166.153.82	10.166.153.83
86	10.166.153.84/30	10.166.153.85 – 10.166.153.86	10.166.153.87
87	10.166.153.88/30	10.166.153.89 – 10.166.153.90	10.166.153.91
88	10.166.153.92/30	10.166.153.93 – 10.166.153.94	10.166.153.95
89	10.166.153.96/30	10.166.153.97 – 10.166.153.98	10.166.153.99
90	10.166.153.100/30	10.166.153.101 – 10.166.153.102	10.166.153.103
91	10.166.153.104/30	10.166.153.105 – 10.166.153.106	10.166.153.107
92	10.166.153.108/30	10.166.153.109 – 10.166.153.110	10.166.153.111
93	10.166.153.112/30	10.166.153.113 – 10.166.153.114	10.166.153.115
94	10.166.153.116/30	10.166.153.117 – 10.166.153.118	10.166.153.119
95	10.166.153.120/30	10.166.153.121 – 10.166.153.122	10.166.153.123
96	10.166.153.124/30	10.166.153.125 – 10.166.153.126	10.166.153.127
97	10.166.153.128/30	10.166.153.129 – 10.166.153.130	10.166.153.131
98	10.166.153.132/30	10.166.153.133 – 10.166.153.134	10.166.153.135
99	10.166.153.136/30	10.166.153.137 – 10.166.153.138	10.166.153.139
100	10.166.153.140/30	10.166.153.141 – 10.166.153.142	10.166.153.143
101	10.166.153.144/30	10.166.153.145 – 10.166.153.146	10.166.153.147
102	10.166.153.148/30	10.166.153.149 – 10.166.153.150	10.166.153.151
103	10.166.153.152/30	10.166.153.153 – 10.166.153.154	10.166.153.155
104	10.166.153.156/30	10.166.153.157 – 10.166.153.158	10.166.153.159
105	10.166.153.160/30	10.166.153.161 – 10.166.153.162	10.166.153.163
106	10.166.153.164/30	10.166.153.165 – 10.166.153.166	10.166.153.167
107	10.166.153.168/30	10.166.153.169 – 10.166.153.170	10.166.153.171
108	10.166.153.172/30	10.166.153.173 – 10.166.153.174	10.166.153.175
109	10.166.153.176/30	10.166.153.177 – 10.166.153.178	10.166.153.179
110	10.166.153.180/30	10.166.153.181 – 10.166.153.182	10.166.153.183
111	10.166.153.184/30	10.166.153.185 – 10.166.153.186	10.166.153.187
112	10.166.153.188/30	10.166.153.189 – 10.166.153.190	10.166.153.191
113	10.166.153.192/30	10.166.153.193 – 10.166.153.194	10.166.153.195
114	10.166.153.196/30	10.166.153.197 – 10.166.153.198	10.166.153.199
115	10.166.153.200/30	10.166.153.201 – 10.166.153.202	10.166.153.203
116	10.166.153.204/30	10.166.153.205 – 10.166.153.206	10.166.153.207
117	10.166.153.208/30	10.166.153.209 – 10.166.153.210	10.166.153.211
118	10.166.153.212/30	10.166.153.213 – 10.166.153.214	10.166.153.215
119	10.166.153.216/30	10.166.153.217 – 10.166.153.218	10.166.153.219
120	10.166.153.220/30	10.166.153.221 – 10.166.153.222	10.166.153.223
121	10.166.153.224/30	10.166.153.225 – 10.166.153.226	10.166.153.227
122	10.166.153.228/30	10.166.153.229 – 10.166.153.230	10.166.153.231
123	10.166.153.232/30	10.166.153.233 – 10.166.153.234	10.166.153.235
124	10.166.153.236/30	10.166.153.237 – 10.166.153.238	10.166.153.239
125	10.166.153.240/30	10.166.153.241 – 10.166.153.242	10.166.153.243
126	10.166.153.244/30	10.166.153.245 – 10.166.153.246	10.166.153.247
127	10.166.153.248/30	10.166.153.249 – 10.166.153.250	10.166.153.251
128	10.166.153.252/30	10.166.153.253 – 10.166.153.254	10.166.153.255

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 →