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)10.3.53.0/24

network10.3.53.0/24

broadcast10.3.53.255

first host10.3.53.1

last host10.3.53.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.3.53.0/24

address00001010.00000011.00110101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000011.00110101.00000000

broadcast00001010.00000011.00110101.11111111

green = network part, grey = host part

hex0x0a033500

decimal167982336

reverse dns0.53.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3500

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.53.0/31	10.3.53.0 – 10.3.53.1	10.3.53.1
2	10.3.53.2/31	10.3.53.2 – 10.3.53.3	10.3.53.3
3	10.3.53.4/31	10.3.53.4 – 10.3.53.5	10.3.53.5
4	10.3.53.6/31	10.3.53.6 – 10.3.53.7	10.3.53.7
5	10.3.53.8/31	10.3.53.8 – 10.3.53.9	10.3.53.9
6	10.3.53.10/31	10.3.53.10 – 10.3.53.11	10.3.53.11
7	10.3.53.12/31	10.3.53.12 – 10.3.53.13	10.3.53.13
8	10.3.53.14/31	10.3.53.14 – 10.3.53.15	10.3.53.15
9	10.3.53.16/31	10.3.53.16 – 10.3.53.17	10.3.53.17
10	10.3.53.18/31	10.3.53.18 – 10.3.53.19	10.3.53.19
11	10.3.53.20/31	10.3.53.20 – 10.3.53.21	10.3.53.21
12	10.3.53.22/31	10.3.53.22 – 10.3.53.23	10.3.53.23
13	10.3.53.24/31	10.3.53.24 – 10.3.53.25	10.3.53.25
14	10.3.53.26/31	10.3.53.26 – 10.3.53.27	10.3.53.27
15	10.3.53.28/31	10.3.53.28 – 10.3.53.29	10.3.53.29
16	10.3.53.30/31	10.3.53.30 – 10.3.53.31	10.3.53.31
17	10.3.53.32/31	10.3.53.32 – 10.3.53.33	10.3.53.33
18	10.3.53.34/31	10.3.53.34 – 10.3.53.35	10.3.53.35
19	10.3.53.36/31	10.3.53.36 – 10.3.53.37	10.3.53.37
20	10.3.53.38/31	10.3.53.38 – 10.3.53.39	10.3.53.39
21	10.3.53.40/31	10.3.53.40 – 10.3.53.41	10.3.53.41
22	10.3.53.42/31	10.3.53.42 – 10.3.53.43	10.3.53.43
23	10.3.53.44/31	10.3.53.44 – 10.3.53.45	10.3.53.45
24	10.3.53.46/31	10.3.53.46 – 10.3.53.47	10.3.53.47
25	10.3.53.48/31	10.3.53.48 – 10.3.53.49	10.3.53.49
26	10.3.53.50/31	10.3.53.50 – 10.3.53.51	10.3.53.51
27	10.3.53.52/31	10.3.53.52 – 10.3.53.53	10.3.53.53
28	10.3.53.54/31	10.3.53.54 – 10.3.53.55	10.3.53.55
29	10.3.53.56/31	10.3.53.56 – 10.3.53.57	10.3.53.57
30	10.3.53.58/31	10.3.53.58 – 10.3.53.59	10.3.53.59
31	10.3.53.60/31	10.3.53.60 – 10.3.53.61	10.3.53.61
32	10.3.53.62/31	10.3.53.62 – 10.3.53.63	10.3.53.63
33	10.3.53.64/31	10.3.53.64 – 10.3.53.65	10.3.53.65
34	10.3.53.66/31	10.3.53.66 – 10.3.53.67	10.3.53.67
35	10.3.53.68/31	10.3.53.68 – 10.3.53.69	10.3.53.69
36	10.3.53.70/31	10.3.53.70 – 10.3.53.71	10.3.53.71
37	10.3.53.72/31	10.3.53.72 – 10.3.53.73	10.3.53.73
38	10.3.53.74/31	10.3.53.74 – 10.3.53.75	10.3.53.75
39	10.3.53.76/31	10.3.53.76 – 10.3.53.77	10.3.53.77
40	10.3.53.78/31	10.3.53.78 – 10.3.53.79	10.3.53.79
41	10.3.53.80/31	10.3.53.80 – 10.3.53.81	10.3.53.81
42	10.3.53.82/31	10.3.53.82 – 10.3.53.83	10.3.53.83
43	10.3.53.84/31	10.3.53.84 – 10.3.53.85	10.3.53.85
44	10.3.53.86/31	10.3.53.86 – 10.3.53.87	10.3.53.87
45	10.3.53.88/31	10.3.53.88 – 10.3.53.89	10.3.53.89
46	10.3.53.90/31	10.3.53.90 – 10.3.53.91	10.3.53.91
47	10.3.53.92/31	10.3.53.92 – 10.3.53.93	10.3.53.93
48	10.3.53.94/31	10.3.53.94 – 10.3.53.95	10.3.53.95
49	10.3.53.96/31	10.3.53.96 – 10.3.53.97	10.3.53.97
50	10.3.53.98/31	10.3.53.98 – 10.3.53.99	10.3.53.99
51	10.3.53.100/31	10.3.53.100 – 10.3.53.101	10.3.53.101
52	10.3.53.102/31	10.3.53.102 – 10.3.53.103	10.3.53.103
53	10.3.53.104/31	10.3.53.104 – 10.3.53.105	10.3.53.105
54	10.3.53.106/31	10.3.53.106 – 10.3.53.107	10.3.53.107
55	10.3.53.108/31	10.3.53.108 – 10.3.53.109	10.3.53.109
56	10.3.53.110/31	10.3.53.110 – 10.3.53.111	10.3.53.111
57	10.3.53.112/31	10.3.53.112 – 10.3.53.113	10.3.53.113
58	10.3.53.114/31	10.3.53.114 – 10.3.53.115	10.3.53.115
59	10.3.53.116/31	10.3.53.116 – 10.3.53.117	10.3.53.117
60	10.3.53.118/31	10.3.53.118 – 10.3.53.119	10.3.53.119
61	10.3.53.120/31	10.3.53.120 – 10.3.53.121	10.3.53.121
62	10.3.53.122/31	10.3.53.122 – 10.3.53.123	10.3.53.123
63	10.3.53.124/31	10.3.53.124 – 10.3.53.125	10.3.53.125
64	10.3.53.126/31	10.3.53.126 – 10.3.53.127	10.3.53.127
65	10.3.53.128/31	10.3.53.128 – 10.3.53.129	10.3.53.129
66	10.3.53.130/31	10.3.53.130 – 10.3.53.131	10.3.53.131
67	10.3.53.132/31	10.3.53.132 – 10.3.53.133	10.3.53.133
68	10.3.53.134/31	10.3.53.134 – 10.3.53.135	10.3.53.135
69	10.3.53.136/31	10.3.53.136 – 10.3.53.137	10.3.53.137
70	10.3.53.138/31	10.3.53.138 – 10.3.53.139	10.3.53.139
71	10.3.53.140/31	10.3.53.140 – 10.3.53.141	10.3.53.141
72	10.3.53.142/31	10.3.53.142 – 10.3.53.143	10.3.53.143
73	10.3.53.144/31	10.3.53.144 – 10.3.53.145	10.3.53.145
74	10.3.53.146/31	10.3.53.146 – 10.3.53.147	10.3.53.147
75	10.3.53.148/31	10.3.53.148 – 10.3.53.149	10.3.53.149
76	10.3.53.150/31	10.3.53.150 – 10.3.53.151	10.3.53.151
77	10.3.53.152/31	10.3.53.152 – 10.3.53.153	10.3.53.153
78	10.3.53.154/31	10.3.53.154 – 10.3.53.155	10.3.53.155
79	10.3.53.156/31	10.3.53.156 – 10.3.53.157	10.3.53.157
80	10.3.53.158/31	10.3.53.158 – 10.3.53.159	10.3.53.159
81	10.3.53.160/31	10.3.53.160 – 10.3.53.161	10.3.53.161
82	10.3.53.162/31	10.3.53.162 – 10.3.53.163	10.3.53.163
83	10.3.53.164/31	10.3.53.164 – 10.3.53.165	10.3.53.165
84	10.3.53.166/31	10.3.53.166 – 10.3.53.167	10.3.53.167
85	10.3.53.168/31	10.3.53.168 – 10.3.53.169	10.3.53.169
86	10.3.53.170/31	10.3.53.170 – 10.3.53.171	10.3.53.171
87	10.3.53.172/31	10.3.53.172 – 10.3.53.173	10.3.53.173
88	10.3.53.174/31	10.3.53.174 – 10.3.53.175	10.3.53.175
89	10.3.53.176/31	10.3.53.176 – 10.3.53.177	10.3.53.177
90	10.3.53.178/31	10.3.53.178 – 10.3.53.179	10.3.53.179
91	10.3.53.180/31	10.3.53.180 – 10.3.53.181	10.3.53.181
92	10.3.53.182/31	10.3.53.182 – 10.3.53.183	10.3.53.183
93	10.3.53.184/31	10.3.53.184 – 10.3.53.185	10.3.53.185
94	10.3.53.186/31	10.3.53.186 – 10.3.53.187	10.3.53.187
95	10.3.53.188/31	10.3.53.188 – 10.3.53.189	10.3.53.189
96	10.3.53.190/31	10.3.53.190 – 10.3.53.191	10.3.53.191
97	10.3.53.192/31	10.3.53.192 – 10.3.53.193	10.3.53.193
98	10.3.53.194/31	10.3.53.194 – 10.3.53.195	10.3.53.195
99	10.3.53.196/31	10.3.53.196 – 10.3.53.197	10.3.53.197
100	10.3.53.198/31	10.3.53.198 – 10.3.53.199	10.3.53.199
101	10.3.53.200/31	10.3.53.200 – 10.3.53.201	10.3.53.201
102	10.3.53.202/31	10.3.53.202 – 10.3.53.203	10.3.53.203
103	10.3.53.204/31	10.3.53.204 – 10.3.53.205	10.3.53.205
104	10.3.53.206/31	10.3.53.206 – 10.3.53.207	10.3.53.207
105	10.3.53.208/31	10.3.53.208 – 10.3.53.209	10.3.53.209
106	10.3.53.210/31	10.3.53.210 – 10.3.53.211	10.3.53.211
107	10.3.53.212/31	10.3.53.212 – 10.3.53.213	10.3.53.213
108	10.3.53.214/31	10.3.53.214 – 10.3.53.215	10.3.53.215
109	10.3.53.216/31	10.3.53.216 – 10.3.53.217	10.3.53.217
110	10.3.53.218/31	10.3.53.218 – 10.3.53.219	10.3.53.219
111	10.3.53.220/31	10.3.53.220 – 10.3.53.221	10.3.53.221
112	10.3.53.222/31	10.3.53.222 – 10.3.53.223	10.3.53.223
113	10.3.53.224/31	10.3.53.224 – 10.3.53.225	10.3.53.225
114	10.3.53.226/31	10.3.53.226 – 10.3.53.227	10.3.53.227
115	10.3.53.228/31	10.3.53.228 – 10.3.53.229	10.3.53.229
116	10.3.53.230/31	10.3.53.230 – 10.3.53.231	10.3.53.231
117	10.3.53.232/31	10.3.53.232 – 10.3.53.233	10.3.53.233
118	10.3.53.234/31	10.3.53.234 – 10.3.53.235	10.3.53.235
119	10.3.53.236/31	10.3.53.236 – 10.3.53.237	10.3.53.237
120	10.3.53.238/31	10.3.53.238 – 10.3.53.239	10.3.53.239
121	10.3.53.240/31	10.3.53.240 – 10.3.53.241	10.3.53.241
122	10.3.53.242/31	10.3.53.242 – 10.3.53.243	10.3.53.243
123	10.3.53.244/31	10.3.53.244 – 10.3.53.245	10.3.53.245
124	10.3.53.246/31	10.3.53.246 – 10.3.53.247	10.3.53.247
125	10.3.53.248/31	10.3.53.248 – 10.3.53.249	10.3.53.249
126	10.3.53.250/31	10.3.53.250 – 10.3.53.251	10.3.53.251
127	10.3.53.252/31	10.3.53.252 – 10.3.53.253	10.3.53.253
128	10.3.53.254/31	10.3.53.254 – 10.3.53.255	10.3.53.255

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 /24
/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	-
/24	255.255.255.0	256	254	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 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 →