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)10.0.224.0/23

network10.0.224.0/23

broadcast10.0.225.255

first host10.0.224.1

last host10.0.225.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.224.0/23

address00001010.00000000.11100000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.11100000.00000000

broadcast00001010.00000000.11100001.11111111

green = network part, grey = host part

hex0x0a00e000

decimal167829504

reverse dns0.224.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:e000

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.224.0/30	10.0.224.1 – 10.0.224.2	10.0.224.3
2	10.0.224.4/30	10.0.224.5 – 10.0.224.6	10.0.224.7
3	10.0.224.8/30	10.0.224.9 – 10.0.224.10	10.0.224.11
4	10.0.224.12/30	10.0.224.13 – 10.0.224.14	10.0.224.15
5	10.0.224.16/30	10.0.224.17 – 10.0.224.18	10.0.224.19
6	10.0.224.20/30	10.0.224.21 – 10.0.224.22	10.0.224.23
7	10.0.224.24/30	10.0.224.25 – 10.0.224.26	10.0.224.27
8	10.0.224.28/30	10.0.224.29 – 10.0.224.30	10.0.224.31
9	10.0.224.32/30	10.0.224.33 – 10.0.224.34	10.0.224.35
10	10.0.224.36/30	10.0.224.37 – 10.0.224.38	10.0.224.39
11	10.0.224.40/30	10.0.224.41 – 10.0.224.42	10.0.224.43
12	10.0.224.44/30	10.0.224.45 – 10.0.224.46	10.0.224.47
13	10.0.224.48/30	10.0.224.49 – 10.0.224.50	10.0.224.51
14	10.0.224.52/30	10.0.224.53 – 10.0.224.54	10.0.224.55
15	10.0.224.56/30	10.0.224.57 – 10.0.224.58	10.0.224.59
16	10.0.224.60/30	10.0.224.61 – 10.0.224.62	10.0.224.63
17	10.0.224.64/30	10.0.224.65 – 10.0.224.66	10.0.224.67
18	10.0.224.68/30	10.0.224.69 – 10.0.224.70	10.0.224.71
19	10.0.224.72/30	10.0.224.73 – 10.0.224.74	10.0.224.75
20	10.0.224.76/30	10.0.224.77 – 10.0.224.78	10.0.224.79
21	10.0.224.80/30	10.0.224.81 – 10.0.224.82	10.0.224.83
22	10.0.224.84/30	10.0.224.85 – 10.0.224.86	10.0.224.87
23	10.0.224.88/30	10.0.224.89 – 10.0.224.90	10.0.224.91
24	10.0.224.92/30	10.0.224.93 – 10.0.224.94	10.0.224.95
25	10.0.224.96/30	10.0.224.97 – 10.0.224.98	10.0.224.99
26	10.0.224.100/30	10.0.224.101 – 10.0.224.102	10.0.224.103
27	10.0.224.104/30	10.0.224.105 – 10.0.224.106	10.0.224.107
28	10.0.224.108/30	10.0.224.109 – 10.0.224.110	10.0.224.111
29	10.0.224.112/30	10.0.224.113 – 10.0.224.114	10.0.224.115
30	10.0.224.116/30	10.0.224.117 – 10.0.224.118	10.0.224.119
31	10.0.224.120/30	10.0.224.121 – 10.0.224.122	10.0.224.123
32	10.0.224.124/30	10.0.224.125 – 10.0.224.126	10.0.224.127
33	10.0.224.128/30	10.0.224.129 – 10.0.224.130	10.0.224.131
34	10.0.224.132/30	10.0.224.133 – 10.0.224.134	10.0.224.135
35	10.0.224.136/30	10.0.224.137 – 10.0.224.138	10.0.224.139
36	10.0.224.140/30	10.0.224.141 – 10.0.224.142	10.0.224.143
37	10.0.224.144/30	10.0.224.145 – 10.0.224.146	10.0.224.147
38	10.0.224.148/30	10.0.224.149 – 10.0.224.150	10.0.224.151
39	10.0.224.152/30	10.0.224.153 – 10.0.224.154	10.0.224.155
40	10.0.224.156/30	10.0.224.157 – 10.0.224.158	10.0.224.159
41	10.0.224.160/30	10.0.224.161 – 10.0.224.162	10.0.224.163
42	10.0.224.164/30	10.0.224.165 – 10.0.224.166	10.0.224.167
43	10.0.224.168/30	10.0.224.169 – 10.0.224.170	10.0.224.171
44	10.0.224.172/30	10.0.224.173 – 10.0.224.174	10.0.224.175
45	10.0.224.176/30	10.0.224.177 – 10.0.224.178	10.0.224.179
46	10.0.224.180/30	10.0.224.181 – 10.0.224.182	10.0.224.183
47	10.0.224.184/30	10.0.224.185 – 10.0.224.186	10.0.224.187
48	10.0.224.188/30	10.0.224.189 – 10.0.224.190	10.0.224.191
49	10.0.224.192/30	10.0.224.193 – 10.0.224.194	10.0.224.195
50	10.0.224.196/30	10.0.224.197 – 10.0.224.198	10.0.224.199
51	10.0.224.200/30	10.0.224.201 – 10.0.224.202	10.0.224.203
52	10.0.224.204/30	10.0.224.205 – 10.0.224.206	10.0.224.207
53	10.0.224.208/30	10.0.224.209 – 10.0.224.210	10.0.224.211
54	10.0.224.212/30	10.0.224.213 – 10.0.224.214	10.0.224.215
55	10.0.224.216/30	10.0.224.217 – 10.0.224.218	10.0.224.219
56	10.0.224.220/30	10.0.224.221 – 10.0.224.222	10.0.224.223
57	10.0.224.224/30	10.0.224.225 – 10.0.224.226	10.0.224.227
58	10.0.224.228/30	10.0.224.229 – 10.0.224.230	10.0.224.231
59	10.0.224.232/30	10.0.224.233 – 10.0.224.234	10.0.224.235
60	10.0.224.236/30	10.0.224.237 – 10.0.224.238	10.0.224.239
61	10.0.224.240/30	10.0.224.241 – 10.0.224.242	10.0.224.243
62	10.0.224.244/30	10.0.224.245 – 10.0.224.246	10.0.224.247
63	10.0.224.248/30	10.0.224.249 – 10.0.224.250	10.0.224.251
64	10.0.224.252/30	10.0.224.253 – 10.0.224.254	10.0.224.255
65	10.0.225.0/30	10.0.225.1 – 10.0.225.2	10.0.225.3
66	10.0.225.4/30	10.0.225.5 – 10.0.225.6	10.0.225.7
67	10.0.225.8/30	10.0.225.9 – 10.0.225.10	10.0.225.11
68	10.0.225.12/30	10.0.225.13 – 10.0.225.14	10.0.225.15
69	10.0.225.16/30	10.0.225.17 – 10.0.225.18	10.0.225.19
70	10.0.225.20/30	10.0.225.21 – 10.0.225.22	10.0.225.23
71	10.0.225.24/30	10.0.225.25 – 10.0.225.26	10.0.225.27
72	10.0.225.28/30	10.0.225.29 – 10.0.225.30	10.0.225.31
73	10.0.225.32/30	10.0.225.33 – 10.0.225.34	10.0.225.35
74	10.0.225.36/30	10.0.225.37 – 10.0.225.38	10.0.225.39
75	10.0.225.40/30	10.0.225.41 – 10.0.225.42	10.0.225.43
76	10.0.225.44/30	10.0.225.45 – 10.0.225.46	10.0.225.47
77	10.0.225.48/30	10.0.225.49 – 10.0.225.50	10.0.225.51
78	10.0.225.52/30	10.0.225.53 – 10.0.225.54	10.0.225.55
79	10.0.225.56/30	10.0.225.57 – 10.0.225.58	10.0.225.59
80	10.0.225.60/30	10.0.225.61 – 10.0.225.62	10.0.225.63
81	10.0.225.64/30	10.0.225.65 – 10.0.225.66	10.0.225.67
82	10.0.225.68/30	10.0.225.69 – 10.0.225.70	10.0.225.71
83	10.0.225.72/30	10.0.225.73 – 10.0.225.74	10.0.225.75
84	10.0.225.76/30	10.0.225.77 – 10.0.225.78	10.0.225.79
85	10.0.225.80/30	10.0.225.81 – 10.0.225.82	10.0.225.83
86	10.0.225.84/30	10.0.225.85 – 10.0.225.86	10.0.225.87
87	10.0.225.88/30	10.0.225.89 – 10.0.225.90	10.0.225.91
88	10.0.225.92/30	10.0.225.93 – 10.0.225.94	10.0.225.95
89	10.0.225.96/30	10.0.225.97 – 10.0.225.98	10.0.225.99
90	10.0.225.100/30	10.0.225.101 – 10.0.225.102	10.0.225.103
91	10.0.225.104/30	10.0.225.105 – 10.0.225.106	10.0.225.107
92	10.0.225.108/30	10.0.225.109 – 10.0.225.110	10.0.225.111
93	10.0.225.112/30	10.0.225.113 – 10.0.225.114	10.0.225.115
94	10.0.225.116/30	10.0.225.117 – 10.0.225.118	10.0.225.119
95	10.0.225.120/30	10.0.225.121 – 10.0.225.122	10.0.225.123
96	10.0.225.124/30	10.0.225.125 – 10.0.225.126	10.0.225.127
97	10.0.225.128/30	10.0.225.129 – 10.0.225.130	10.0.225.131
98	10.0.225.132/30	10.0.225.133 – 10.0.225.134	10.0.225.135
99	10.0.225.136/30	10.0.225.137 – 10.0.225.138	10.0.225.139
100	10.0.225.140/30	10.0.225.141 – 10.0.225.142	10.0.225.143
101	10.0.225.144/30	10.0.225.145 – 10.0.225.146	10.0.225.147
102	10.0.225.148/30	10.0.225.149 – 10.0.225.150	10.0.225.151
103	10.0.225.152/30	10.0.225.153 – 10.0.225.154	10.0.225.155
104	10.0.225.156/30	10.0.225.157 – 10.0.225.158	10.0.225.159
105	10.0.225.160/30	10.0.225.161 – 10.0.225.162	10.0.225.163
106	10.0.225.164/30	10.0.225.165 – 10.0.225.166	10.0.225.167
107	10.0.225.168/30	10.0.225.169 – 10.0.225.170	10.0.225.171
108	10.0.225.172/30	10.0.225.173 – 10.0.225.174	10.0.225.175
109	10.0.225.176/30	10.0.225.177 – 10.0.225.178	10.0.225.179
110	10.0.225.180/30	10.0.225.181 – 10.0.225.182	10.0.225.183
111	10.0.225.184/30	10.0.225.185 – 10.0.225.186	10.0.225.187
112	10.0.225.188/30	10.0.225.189 – 10.0.225.190	10.0.225.191
113	10.0.225.192/30	10.0.225.193 – 10.0.225.194	10.0.225.195
114	10.0.225.196/30	10.0.225.197 – 10.0.225.198	10.0.225.199
115	10.0.225.200/30	10.0.225.201 – 10.0.225.202	10.0.225.203
116	10.0.225.204/30	10.0.225.205 – 10.0.225.206	10.0.225.207
117	10.0.225.208/30	10.0.225.209 – 10.0.225.210	10.0.225.211
118	10.0.225.212/30	10.0.225.213 – 10.0.225.214	10.0.225.215
119	10.0.225.216/30	10.0.225.217 – 10.0.225.218	10.0.225.219
120	10.0.225.220/30	10.0.225.221 – 10.0.225.222	10.0.225.223
121	10.0.225.224/30	10.0.225.225 – 10.0.225.226	10.0.225.227
122	10.0.225.228/30	10.0.225.229 – 10.0.225.230	10.0.225.231
123	10.0.225.232/30	10.0.225.233 – 10.0.225.234	10.0.225.235
124	10.0.225.236/30	10.0.225.237 – 10.0.225.238	10.0.225.239
125	10.0.225.240/30	10.0.225.241 – 10.0.225.242	10.0.225.243
126	10.0.225.244/30	10.0.225.245 – 10.0.225.246	10.0.225.247
127	10.0.225.248/30	10.0.225.249 – 10.0.225.250	10.0.225.251
128	10.0.225.252/30	10.0.225.253 – 10.0.225.254	10.0.225.255

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 →