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)10.0.184.0/23

network10.0.184.0/23

broadcast10.0.185.255

first host10.0.184.1

last host10.0.185.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.184.0/23

address00001010.00000000.10111000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.10111000.00000000

broadcast00001010.00000000.10111001.11111111

green = network part, grey = host part

hex0x0a00b800

decimal167819264

reverse dns0.184.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:b800

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.184.0/30	10.0.184.1 – 10.0.184.2	10.0.184.3
2	10.0.184.4/30	10.0.184.5 – 10.0.184.6	10.0.184.7
3	10.0.184.8/30	10.0.184.9 – 10.0.184.10	10.0.184.11
4	10.0.184.12/30	10.0.184.13 – 10.0.184.14	10.0.184.15
5	10.0.184.16/30	10.0.184.17 – 10.0.184.18	10.0.184.19
6	10.0.184.20/30	10.0.184.21 – 10.0.184.22	10.0.184.23
7	10.0.184.24/30	10.0.184.25 – 10.0.184.26	10.0.184.27
8	10.0.184.28/30	10.0.184.29 – 10.0.184.30	10.0.184.31
9	10.0.184.32/30	10.0.184.33 – 10.0.184.34	10.0.184.35
10	10.0.184.36/30	10.0.184.37 – 10.0.184.38	10.0.184.39
11	10.0.184.40/30	10.0.184.41 – 10.0.184.42	10.0.184.43
12	10.0.184.44/30	10.0.184.45 – 10.0.184.46	10.0.184.47
13	10.0.184.48/30	10.0.184.49 – 10.0.184.50	10.0.184.51
14	10.0.184.52/30	10.0.184.53 – 10.0.184.54	10.0.184.55
15	10.0.184.56/30	10.0.184.57 – 10.0.184.58	10.0.184.59
16	10.0.184.60/30	10.0.184.61 – 10.0.184.62	10.0.184.63
17	10.0.184.64/30	10.0.184.65 – 10.0.184.66	10.0.184.67
18	10.0.184.68/30	10.0.184.69 – 10.0.184.70	10.0.184.71
19	10.0.184.72/30	10.0.184.73 – 10.0.184.74	10.0.184.75
20	10.0.184.76/30	10.0.184.77 – 10.0.184.78	10.0.184.79
21	10.0.184.80/30	10.0.184.81 – 10.0.184.82	10.0.184.83
22	10.0.184.84/30	10.0.184.85 – 10.0.184.86	10.0.184.87
23	10.0.184.88/30	10.0.184.89 – 10.0.184.90	10.0.184.91
24	10.0.184.92/30	10.0.184.93 – 10.0.184.94	10.0.184.95
25	10.0.184.96/30	10.0.184.97 – 10.0.184.98	10.0.184.99
26	10.0.184.100/30	10.0.184.101 – 10.0.184.102	10.0.184.103
27	10.0.184.104/30	10.0.184.105 – 10.0.184.106	10.0.184.107
28	10.0.184.108/30	10.0.184.109 – 10.0.184.110	10.0.184.111
29	10.0.184.112/30	10.0.184.113 – 10.0.184.114	10.0.184.115
30	10.0.184.116/30	10.0.184.117 – 10.0.184.118	10.0.184.119
31	10.0.184.120/30	10.0.184.121 – 10.0.184.122	10.0.184.123
32	10.0.184.124/30	10.0.184.125 – 10.0.184.126	10.0.184.127
33	10.0.184.128/30	10.0.184.129 – 10.0.184.130	10.0.184.131
34	10.0.184.132/30	10.0.184.133 – 10.0.184.134	10.0.184.135
35	10.0.184.136/30	10.0.184.137 – 10.0.184.138	10.0.184.139
36	10.0.184.140/30	10.0.184.141 – 10.0.184.142	10.0.184.143
37	10.0.184.144/30	10.0.184.145 – 10.0.184.146	10.0.184.147
38	10.0.184.148/30	10.0.184.149 – 10.0.184.150	10.0.184.151
39	10.0.184.152/30	10.0.184.153 – 10.0.184.154	10.0.184.155
40	10.0.184.156/30	10.0.184.157 – 10.0.184.158	10.0.184.159
41	10.0.184.160/30	10.0.184.161 – 10.0.184.162	10.0.184.163
42	10.0.184.164/30	10.0.184.165 – 10.0.184.166	10.0.184.167
43	10.0.184.168/30	10.0.184.169 – 10.0.184.170	10.0.184.171
44	10.0.184.172/30	10.0.184.173 – 10.0.184.174	10.0.184.175
45	10.0.184.176/30	10.0.184.177 – 10.0.184.178	10.0.184.179
46	10.0.184.180/30	10.0.184.181 – 10.0.184.182	10.0.184.183
47	10.0.184.184/30	10.0.184.185 – 10.0.184.186	10.0.184.187
48	10.0.184.188/30	10.0.184.189 – 10.0.184.190	10.0.184.191
49	10.0.184.192/30	10.0.184.193 – 10.0.184.194	10.0.184.195
50	10.0.184.196/30	10.0.184.197 – 10.0.184.198	10.0.184.199
51	10.0.184.200/30	10.0.184.201 – 10.0.184.202	10.0.184.203
52	10.0.184.204/30	10.0.184.205 – 10.0.184.206	10.0.184.207
53	10.0.184.208/30	10.0.184.209 – 10.0.184.210	10.0.184.211
54	10.0.184.212/30	10.0.184.213 – 10.0.184.214	10.0.184.215
55	10.0.184.216/30	10.0.184.217 – 10.0.184.218	10.0.184.219
56	10.0.184.220/30	10.0.184.221 – 10.0.184.222	10.0.184.223
57	10.0.184.224/30	10.0.184.225 – 10.0.184.226	10.0.184.227
58	10.0.184.228/30	10.0.184.229 – 10.0.184.230	10.0.184.231
59	10.0.184.232/30	10.0.184.233 – 10.0.184.234	10.0.184.235
60	10.0.184.236/30	10.0.184.237 – 10.0.184.238	10.0.184.239
61	10.0.184.240/30	10.0.184.241 – 10.0.184.242	10.0.184.243
62	10.0.184.244/30	10.0.184.245 – 10.0.184.246	10.0.184.247
63	10.0.184.248/30	10.0.184.249 – 10.0.184.250	10.0.184.251
64	10.0.184.252/30	10.0.184.253 – 10.0.184.254	10.0.184.255
65	10.0.185.0/30	10.0.185.1 – 10.0.185.2	10.0.185.3
66	10.0.185.4/30	10.0.185.5 – 10.0.185.6	10.0.185.7
67	10.0.185.8/30	10.0.185.9 – 10.0.185.10	10.0.185.11
68	10.0.185.12/30	10.0.185.13 – 10.0.185.14	10.0.185.15
69	10.0.185.16/30	10.0.185.17 – 10.0.185.18	10.0.185.19
70	10.0.185.20/30	10.0.185.21 – 10.0.185.22	10.0.185.23
71	10.0.185.24/30	10.0.185.25 – 10.0.185.26	10.0.185.27
72	10.0.185.28/30	10.0.185.29 – 10.0.185.30	10.0.185.31
73	10.0.185.32/30	10.0.185.33 – 10.0.185.34	10.0.185.35
74	10.0.185.36/30	10.0.185.37 – 10.0.185.38	10.0.185.39
75	10.0.185.40/30	10.0.185.41 – 10.0.185.42	10.0.185.43
76	10.0.185.44/30	10.0.185.45 – 10.0.185.46	10.0.185.47
77	10.0.185.48/30	10.0.185.49 – 10.0.185.50	10.0.185.51
78	10.0.185.52/30	10.0.185.53 – 10.0.185.54	10.0.185.55
79	10.0.185.56/30	10.0.185.57 – 10.0.185.58	10.0.185.59
80	10.0.185.60/30	10.0.185.61 – 10.0.185.62	10.0.185.63
81	10.0.185.64/30	10.0.185.65 – 10.0.185.66	10.0.185.67
82	10.0.185.68/30	10.0.185.69 – 10.0.185.70	10.0.185.71
83	10.0.185.72/30	10.0.185.73 – 10.0.185.74	10.0.185.75
84	10.0.185.76/30	10.0.185.77 – 10.0.185.78	10.0.185.79
85	10.0.185.80/30	10.0.185.81 – 10.0.185.82	10.0.185.83
86	10.0.185.84/30	10.0.185.85 – 10.0.185.86	10.0.185.87
87	10.0.185.88/30	10.0.185.89 – 10.0.185.90	10.0.185.91
88	10.0.185.92/30	10.0.185.93 – 10.0.185.94	10.0.185.95
89	10.0.185.96/30	10.0.185.97 – 10.0.185.98	10.0.185.99
90	10.0.185.100/30	10.0.185.101 – 10.0.185.102	10.0.185.103
91	10.0.185.104/30	10.0.185.105 – 10.0.185.106	10.0.185.107
92	10.0.185.108/30	10.0.185.109 – 10.0.185.110	10.0.185.111
93	10.0.185.112/30	10.0.185.113 – 10.0.185.114	10.0.185.115
94	10.0.185.116/30	10.0.185.117 – 10.0.185.118	10.0.185.119
95	10.0.185.120/30	10.0.185.121 – 10.0.185.122	10.0.185.123
96	10.0.185.124/30	10.0.185.125 – 10.0.185.126	10.0.185.127
97	10.0.185.128/30	10.0.185.129 – 10.0.185.130	10.0.185.131
98	10.0.185.132/30	10.0.185.133 – 10.0.185.134	10.0.185.135
99	10.0.185.136/30	10.0.185.137 – 10.0.185.138	10.0.185.139
100	10.0.185.140/30	10.0.185.141 – 10.0.185.142	10.0.185.143
101	10.0.185.144/30	10.0.185.145 – 10.0.185.146	10.0.185.147
102	10.0.185.148/30	10.0.185.149 – 10.0.185.150	10.0.185.151
103	10.0.185.152/30	10.0.185.153 – 10.0.185.154	10.0.185.155
104	10.0.185.156/30	10.0.185.157 – 10.0.185.158	10.0.185.159
105	10.0.185.160/30	10.0.185.161 – 10.0.185.162	10.0.185.163
106	10.0.185.164/30	10.0.185.165 – 10.0.185.166	10.0.185.167
107	10.0.185.168/30	10.0.185.169 – 10.0.185.170	10.0.185.171
108	10.0.185.172/30	10.0.185.173 – 10.0.185.174	10.0.185.175
109	10.0.185.176/30	10.0.185.177 – 10.0.185.178	10.0.185.179
110	10.0.185.180/30	10.0.185.181 – 10.0.185.182	10.0.185.183
111	10.0.185.184/30	10.0.185.185 – 10.0.185.186	10.0.185.187
112	10.0.185.188/30	10.0.185.189 – 10.0.185.190	10.0.185.191
113	10.0.185.192/30	10.0.185.193 – 10.0.185.194	10.0.185.195
114	10.0.185.196/30	10.0.185.197 – 10.0.185.198	10.0.185.199
115	10.0.185.200/30	10.0.185.201 – 10.0.185.202	10.0.185.203
116	10.0.185.204/30	10.0.185.205 – 10.0.185.206	10.0.185.207
117	10.0.185.208/30	10.0.185.209 – 10.0.185.210	10.0.185.211
118	10.0.185.212/30	10.0.185.213 – 10.0.185.214	10.0.185.215
119	10.0.185.216/30	10.0.185.217 – 10.0.185.218	10.0.185.219
120	10.0.185.220/30	10.0.185.221 – 10.0.185.222	10.0.185.223
121	10.0.185.224/30	10.0.185.225 – 10.0.185.226	10.0.185.227
122	10.0.185.228/30	10.0.185.229 – 10.0.185.230	10.0.185.231
123	10.0.185.232/30	10.0.185.233 – 10.0.185.234	10.0.185.235
124	10.0.185.236/30	10.0.185.237 – 10.0.185.238	10.0.185.239
125	10.0.185.240/30	10.0.185.241 – 10.0.185.242	10.0.185.243
126	10.0.185.244/30	10.0.185.245 – 10.0.185.246	10.0.185.247
127	10.0.185.248/30	10.0.185.249 – 10.0.185.250	10.0.185.251
128	10.0.185.252/30	10.0.185.253 – 10.0.185.254	10.0.185.255

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 →