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)10.53.78.0/23

network10.53.78.0/23

broadcast10.53.79.255

first host10.53.78.1

last host10.53.79.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.53.78.0/23

address00001010.00110101.01001110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00110101.01001110.00000000

broadcast00001010.00110101.01001111.11111111

green = network part, grey = host part

hex0x0a354e00

decimal171265536

reverse dns0.78.53.10.in-addr.arpa

ipv4-mapped::ffff:a35:4e00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.53.78.0/30	10.53.78.1 – 10.53.78.2	10.53.78.3
2	10.53.78.4/30	10.53.78.5 – 10.53.78.6	10.53.78.7
3	10.53.78.8/30	10.53.78.9 – 10.53.78.10	10.53.78.11
4	10.53.78.12/30	10.53.78.13 – 10.53.78.14	10.53.78.15
5	10.53.78.16/30	10.53.78.17 – 10.53.78.18	10.53.78.19
6	10.53.78.20/30	10.53.78.21 – 10.53.78.22	10.53.78.23
7	10.53.78.24/30	10.53.78.25 – 10.53.78.26	10.53.78.27
8	10.53.78.28/30	10.53.78.29 – 10.53.78.30	10.53.78.31
9	10.53.78.32/30	10.53.78.33 – 10.53.78.34	10.53.78.35
10	10.53.78.36/30	10.53.78.37 – 10.53.78.38	10.53.78.39
11	10.53.78.40/30	10.53.78.41 – 10.53.78.42	10.53.78.43
12	10.53.78.44/30	10.53.78.45 – 10.53.78.46	10.53.78.47
13	10.53.78.48/30	10.53.78.49 – 10.53.78.50	10.53.78.51
14	10.53.78.52/30	10.53.78.53 – 10.53.78.54	10.53.78.55
15	10.53.78.56/30	10.53.78.57 – 10.53.78.58	10.53.78.59
16	10.53.78.60/30	10.53.78.61 – 10.53.78.62	10.53.78.63
17	10.53.78.64/30	10.53.78.65 – 10.53.78.66	10.53.78.67
18	10.53.78.68/30	10.53.78.69 – 10.53.78.70	10.53.78.71
19	10.53.78.72/30	10.53.78.73 – 10.53.78.74	10.53.78.75
20	10.53.78.76/30	10.53.78.77 – 10.53.78.78	10.53.78.79
21	10.53.78.80/30	10.53.78.81 – 10.53.78.82	10.53.78.83
22	10.53.78.84/30	10.53.78.85 – 10.53.78.86	10.53.78.87
23	10.53.78.88/30	10.53.78.89 – 10.53.78.90	10.53.78.91
24	10.53.78.92/30	10.53.78.93 – 10.53.78.94	10.53.78.95
25	10.53.78.96/30	10.53.78.97 – 10.53.78.98	10.53.78.99
26	10.53.78.100/30	10.53.78.101 – 10.53.78.102	10.53.78.103
27	10.53.78.104/30	10.53.78.105 – 10.53.78.106	10.53.78.107
28	10.53.78.108/30	10.53.78.109 – 10.53.78.110	10.53.78.111
29	10.53.78.112/30	10.53.78.113 – 10.53.78.114	10.53.78.115
30	10.53.78.116/30	10.53.78.117 – 10.53.78.118	10.53.78.119
31	10.53.78.120/30	10.53.78.121 – 10.53.78.122	10.53.78.123
32	10.53.78.124/30	10.53.78.125 – 10.53.78.126	10.53.78.127
33	10.53.78.128/30	10.53.78.129 – 10.53.78.130	10.53.78.131
34	10.53.78.132/30	10.53.78.133 – 10.53.78.134	10.53.78.135
35	10.53.78.136/30	10.53.78.137 – 10.53.78.138	10.53.78.139
36	10.53.78.140/30	10.53.78.141 – 10.53.78.142	10.53.78.143
37	10.53.78.144/30	10.53.78.145 – 10.53.78.146	10.53.78.147
38	10.53.78.148/30	10.53.78.149 – 10.53.78.150	10.53.78.151
39	10.53.78.152/30	10.53.78.153 – 10.53.78.154	10.53.78.155
40	10.53.78.156/30	10.53.78.157 – 10.53.78.158	10.53.78.159
41	10.53.78.160/30	10.53.78.161 – 10.53.78.162	10.53.78.163
42	10.53.78.164/30	10.53.78.165 – 10.53.78.166	10.53.78.167
43	10.53.78.168/30	10.53.78.169 – 10.53.78.170	10.53.78.171
44	10.53.78.172/30	10.53.78.173 – 10.53.78.174	10.53.78.175
45	10.53.78.176/30	10.53.78.177 – 10.53.78.178	10.53.78.179
46	10.53.78.180/30	10.53.78.181 – 10.53.78.182	10.53.78.183
47	10.53.78.184/30	10.53.78.185 – 10.53.78.186	10.53.78.187
48	10.53.78.188/30	10.53.78.189 – 10.53.78.190	10.53.78.191
49	10.53.78.192/30	10.53.78.193 – 10.53.78.194	10.53.78.195
50	10.53.78.196/30	10.53.78.197 – 10.53.78.198	10.53.78.199
51	10.53.78.200/30	10.53.78.201 – 10.53.78.202	10.53.78.203
52	10.53.78.204/30	10.53.78.205 – 10.53.78.206	10.53.78.207
53	10.53.78.208/30	10.53.78.209 – 10.53.78.210	10.53.78.211
54	10.53.78.212/30	10.53.78.213 – 10.53.78.214	10.53.78.215
55	10.53.78.216/30	10.53.78.217 – 10.53.78.218	10.53.78.219
56	10.53.78.220/30	10.53.78.221 – 10.53.78.222	10.53.78.223
57	10.53.78.224/30	10.53.78.225 – 10.53.78.226	10.53.78.227
58	10.53.78.228/30	10.53.78.229 – 10.53.78.230	10.53.78.231
59	10.53.78.232/30	10.53.78.233 – 10.53.78.234	10.53.78.235
60	10.53.78.236/30	10.53.78.237 – 10.53.78.238	10.53.78.239
61	10.53.78.240/30	10.53.78.241 – 10.53.78.242	10.53.78.243
62	10.53.78.244/30	10.53.78.245 – 10.53.78.246	10.53.78.247
63	10.53.78.248/30	10.53.78.249 – 10.53.78.250	10.53.78.251
64	10.53.78.252/30	10.53.78.253 – 10.53.78.254	10.53.78.255
65	10.53.79.0/30	10.53.79.1 – 10.53.79.2	10.53.79.3
66	10.53.79.4/30	10.53.79.5 – 10.53.79.6	10.53.79.7
67	10.53.79.8/30	10.53.79.9 – 10.53.79.10	10.53.79.11
68	10.53.79.12/30	10.53.79.13 – 10.53.79.14	10.53.79.15
69	10.53.79.16/30	10.53.79.17 – 10.53.79.18	10.53.79.19
70	10.53.79.20/30	10.53.79.21 – 10.53.79.22	10.53.79.23
71	10.53.79.24/30	10.53.79.25 – 10.53.79.26	10.53.79.27
72	10.53.79.28/30	10.53.79.29 – 10.53.79.30	10.53.79.31
73	10.53.79.32/30	10.53.79.33 – 10.53.79.34	10.53.79.35
74	10.53.79.36/30	10.53.79.37 – 10.53.79.38	10.53.79.39
75	10.53.79.40/30	10.53.79.41 – 10.53.79.42	10.53.79.43
76	10.53.79.44/30	10.53.79.45 – 10.53.79.46	10.53.79.47
77	10.53.79.48/30	10.53.79.49 – 10.53.79.50	10.53.79.51
78	10.53.79.52/30	10.53.79.53 – 10.53.79.54	10.53.79.55
79	10.53.79.56/30	10.53.79.57 – 10.53.79.58	10.53.79.59
80	10.53.79.60/30	10.53.79.61 – 10.53.79.62	10.53.79.63
81	10.53.79.64/30	10.53.79.65 – 10.53.79.66	10.53.79.67
82	10.53.79.68/30	10.53.79.69 – 10.53.79.70	10.53.79.71
83	10.53.79.72/30	10.53.79.73 – 10.53.79.74	10.53.79.75
84	10.53.79.76/30	10.53.79.77 – 10.53.79.78	10.53.79.79
85	10.53.79.80/30	10.53.79.81 – 10.53.79.82	10.53.79.83
86	10.53.79.84/30	10.53.79.85 – 10.53.79.86	10.53.79.87
87	10.53.79.88/30	10.53.79.89 – 10.53.79.90	10.53.79.91
88	10.53.79.92/30	10.53.79.93 – 10.53.79.94	10.53.79.95
89	10.53.79.96/30	10.53.79.97 – 10.53.79.98	10.53.79.99
90	10.53.79.100/30	10.53.79.101 – 10.53.79.102	10.53.79.103
91	10.53.79.104/30	10.53.79.105 – 10.53.79.106	10.53.79.107
92	10.53.79.108/30	10.53.79.109 – 10.53.79.110	10.53.79.111
93	10.53.79.112/30	10.53.79.113 – 10.53.79.114	10.53.79.115
94	10.53.79.116/30	10.53.79.117 – 10.53.79.118	10.53.79.119
95	10.53.79.120/30	10.53.79.121 – 10.53.79.122	10.53.79.123
96	10.53.79.124/30	10.53.79.125 – 10.53.79.126	10.53.79.127
97	10.53.79.128/30	10.53.79.129 – 10.53.79.130	10.53.79.131
98	10.53.79.132/30	10.53.79.133 – 10.53.79.134	10.53.79.135
99	10.53.79.136/30	10.53.79.137 – 10.53.79.138	10.53.79.139
100	10.53.79.140/30	10.53.79.141 – 10.53.79.142	10.53.79.143
101	10.53.79.144/30	10.53.79.145 – 10.53.79.146	10.53.79.147
102	10.53.79.148/30	10.53.79.149 – 10.53.79.150	10.53.79.151
103	10.53.79.152/30	10.53.79.153 – 10.53.79.154	10.53.79.155
104	10.53.79.156/30	10.53.79.157 – 10.53.79.158	10.53.79.159
105	10.53.79.160/30	10.53.79.161 – 10.53.79.162	10.53.79.163
106	10.53.79.164/30	10.53.79.165 – 10.53.79.166	10.53.79.167
107	10.53.79.168/30	10.53.79.169 – 10.53.79.170	10.53.79.171
108	10.53.79.172/30	10.53.79.173 – 10.53.79.174	10.53.79.175
109	10.53.79.176/30	10.53.79.177 – 10.53.79.178	10.53.79.179
110	10.53.79.180/30	10.53.79.181 – 10.53.79.182	10.53.79.183
111	10.53.79.184/30	10.53.79.185 – 10.53.79.186	10.53.79.187
112	10.53.79.188/30	10.53.79.189 – 10.53.79.190	10.53.79.191
113	10.53.79.192/30	10.53.79.193 – 10.53.79.194	10.53.79.195
114	10.53.79.196/30	10.53.79.197 – 10.53.79.198	10.53.79.199
115	10.53.79.200/30	10.53.79.201 – 10.53.79.202	10.53.79.203
116	10.53.79.204/30	10.53.79.205 – 10.53.79.206	10.53.79.207
117	10.53.79.208/30	10.53.79.209 – 10.53.79.210	10.53.79.211
118	10.53.79.212/30	10.53.79.213 – 10.53.79.214	10.53.79.215
119	10.53.79.216/30	10.53.79.217 – 10.53.79.218	10.53.79.219
120	10.53.79.220/30	10.53.79.221 – 10.53.79.222	10.53.79.223
121	10.53.79.224/30	10.53.79.225 – 10.53.79.226	10.53.79.227
122	10.53.79.228/30	10.53.79.229 – 10.53.79.230	10.53.79.231
123	10.53.79.232/30	10.53.79.233 – 10.53.79.234	10.53.79.235
124	10.53.79.236/30	10.53.79.237 – 10.53.79.238	10.53.79.239
125	10.53.79.240/30	10.53.79.241 – 10.53.79.242	10.53.79.243
126	10.53.79.244/30	10.53.79.245 – 10.53.79.246	10.53.79.247
127	10.53.79.248/30	10.53.79.249 – 10.53.79.250	10.53.79.251
128	10.53.79.252/30	10.53.79.253 – 10.53.79.254	10.53.79.255

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 →