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)10.3.229.0/24

network10.3.229.0/24

broadcast10.3.229.255

first host10.3.229.1

last host10.3.229.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.3.229.0/24

address00001010.00000011.11100101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000011.11100101.00000000

broadcast00001010.00000011.11100101.11111111

green = network part, grey = host part

hex0x0a03e500

decimal168027392

reverse dns0.229.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:e500

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.229.0/31	10.3.229.0 – 10.3.229.1	10.3.229.1
2	10.3.229.2/31	10.3.229.2 – 10.3.229.3	10.3.229.3
3	10.3.229.4/31	10.3.229.4 – 10.3.229.5	10.3.229.5
4	10.3.229.6/31	10.3.229.6 – 10.3.229.7	10.3.229.7
5	10.3.229.8/31	10.3.229.8 – 10.3.229.9	10.3.229.9
6	10.3.229.10/31	10.3.229.10 – 10.3.229.11	10.3.229.11
7	10.3.229.12/31	10.3.229.12 – 10.3.229.13	10.3.229.13
8	10.3.229.14/31	10.3.229.14 – 10.3.229.15	10.3.229.15
9	10.3.229.16/31	10.3.229.16 – 10.3.229.17	10.3.229.17
10	10.3.229.18/31	10.3.229.18 – 10.3.229.19	10.3.229.19
11	10.3.229.20/31	10.3.229.20 – 10.3.229.21	10.3.229.21
12	10.3.229.22/31	10.3.229.22 – 10.3.229.23	10.3.229.23
13	10.3.229.24/31	10.3.229.24 – 10.3.229.25	10.3.229.25
14	10.3.229.26/31	10.3.229.26 – 10.3.229.27	10.3.229.27
15	10.3.229.28/31	10.3.229.28 – 10.3.229.29	10.3.229.29
16	10.3.229.30/31	10.3.229.30 – 10.3.229.31	10.3.229.31
17	10.3.229.32/31	10.3.229.32 – 10.3.229.33	10.3.229.33
18	10.3.229.34/31	10.3.229.34 – 10.3.229.35	10.3.229.35
19	10.3.229.36/31	10.3.229.36 – 10.3.229.37	10.3.229.37
20	10.3.229.38/31	10.3.229.38 – 10.3.229.39	10.3.229.39
21	10.3.229.40/31	10.3.229.40 – 10.3.229.41	10.3.229.41
22	10.3.229.42/31	10.3.229.42 – 10.3.229.43	10.3.229.43
23	10.3.229.44/31	10.3.229.44 – 10.3.229.45	10.3.229.45
24	10.3.229.46/31	10.3.229.46 – 10.3.229.47	10.3.229.47
25	10.3.229.48/31	10.3.229.48 – 10.3.229.49	10.3.229.49
26	10.3.229.50/31	10.3.229.50 – 10.3.229.51	10.3.229.51
27	10.3.229.52/31	10.3.229.52 – 10.3.229.53	10.3.229.53
28	10.3.229.54/31	10.3.229.54 – 10.3.229.55	10.3.229.55
29	10.3.229.56/31	10.3.229.56 – 10.3.229.57	10.3.229.57
30	10.3.229.58/31	10.3.229.58 – 10.3.229.59	10.3.229.59
31	10.3.229.60/31	10.3.229.60 – 10.3.229.61	10.3.229.61
32	10.3.229.62/31	10.3.229.62 – 10.3.229.63	10.3.229.63
33	10.3.229.64/31	10.3.229.64 – 10.3.229.65	10.3.229.65
34	10.3.229.66/31	10.3.229.66 – 10.3.229.67	10.3.229.67
35	10.3.229.68/31	10.3.229.68 – 10.3.229.69	10.3.229.69
36	10.3.229.70/31	10.3.229.70 – 10.3.229.71	10.3.229.71
37	10.3.229.72/31	10.3.229.72 – 10.3.229.73	10.3.229.73
38	10.3.229.74/31	10.3.229.74 – 10.3.229.75	10.3.229.75
39	10.3.229.76/31	10.3.229.76 – 10.3.229.77	10.3.229.77
40	10.3.229.78/31	10.3.229.78 – 10.3.229.79	10.3.229.79
41	10.3.229.80/31	10.3.229.80 – 10.3.229.81	10.3.229.81
42	10.3.229.82/31	10.3.229.82 – 10.3.229.83	10.3.229.83
43	10.3.229.84/31	10.3.229.84 – 10.3.229.85	10.3.229.85
44	10.3.229.86/31	10.3.229.86 – 10.3.229.87	10.3.229.87
45	10.3.229.88/31	10.3.229.88 – 10.3.229.89	10.3.229.89
46	10.3.229.90/31	10.3.229.90 – 10.3.229.91	10.3.229.91
47	10.3.229.92/31	10.3.229.92 – 10.3.229.93	10.3.229.93
48	10.3.229.94/31	10.3.229.94 – 10.3.229.95	10.3.229.95
49	10.3.229.96/31	10.3.229.96 – 10.3.229.97	10.3.229.97
50	10.3.229.98/31	10.3.229.98 – 10.3.229.99	10.3.229.99
51	10.3.229.100/31	10.3.229.100 – 10.3.229.101	10.3.229.101
52	10.3.229.102/31	10.3.229.102 – 10.3.229.103	10.3.229.103
53	10.3.229.104/31	10.3.229.104 – 10.3.229.105	10.3.229.105
54	10.3.229.106/31	10.3.229.106 – 10.3.229.107	10.3.229.107
55	10.3.229.108/31	10.3.229.108 – 10.3.229.109	10.3.229.109
56	10.3.229.110/31	10.3.229.110 – 10.3.229.111	10.3.229.111
57	10.3.229.112/31	10.3.229.112 – 10.3.229.113	10.3.229.113
58	10.3.229.114/31	10.3.229.114 – 10.3.229.115	10.3.229.115
59	10.3.229.116/31	10.3.229.116 – 10.3.229.117	10.3.229.117
60	10.3.229.118/31	10.3.229.118 – 10.3.229.119	10.3.229.119
61	10.3.229.120/31	10.3.229.120 – 10.3.229.121	10.3.229.121
62	10.3.229.122/31	10.3.229.122 – 10.3.229.123	10.3.229.123
63	10.3.229.124/31	10.3.229.124 – 10.3.229.125	10.3.229.125
64	10.3.229.126/31	10.3.229.126 – 10.3.229.127	10.3.229.127
65	10.3.229.128/31	10.3.229.128 – 10.3.229.129	10.3.229.129
66	10.3.229.130/31	10.3.229.130 – 10.3.229.131	10.3.229.131
67	10.3.229.132/31	10.3.229.132 – 10.3.229.133	10.3.229.133
68	10.3.229.134/31	10.3.229.134 – 10.3.229.135	10.3.229.135
69	10.3.229.136/31	10.3.229.136 – 10.3.229.137	10.3.229.137
70	10.3.229.138/31	10.3.229.138 – 10.3.229.139	10.3.229.139
71	10.3.229.140/31	10.3.229.140 – 10.3.229.141	10.3.229.141
72	10.3.229.142/31	10.3.229.142 – 10.3.229.143	10.3.229.143
73	10.3.229.144/31	10.3.229.144 – 10.3.229.145	10.3.229.145
74	10.3.229.146/31	10.3.229.146 – 10.3.229.147	10.3.229.147
75	10.3.229.148/31	10.3.229.148 – 10.3.229.149	10.3.229.149
76	10.3.229.150/31	10.3.229.150 – 10.3.229.151	10.3.229.151
77	10.3.229.152/31	10.3.229.152 – 10.3.229.153	10.3.229.153
78	10.3.229.154/31	10.3.229.154 – 10.3.229.155	10.3.229.155
79	10.3.229.156/31	10.3.229.156 – 10.3.229.157	10.3.229.157
80	10.3.229.158/31	10.3.229.158 – 10.3.229.159	10.3.229.159
81	10.3.229.160/31	10.3.229.160 – 10.3.229.161	10.3.229.161
82	10.3.229.162/31	10.3.229.162 – 10.3.229.163	10.3.229.163
83	10.3.229.164/31	10.3.229.164 – 10.3.229.165	10.3.229.165
84	10.3.229.166/31	10.3.229.166 – 10.3.229.167	10.3.229.167
85	10.3.229.168/31	10.3.229.168 – 10.3.229.169	10.3.229.169
86	10.3.229.170/31	10.3.229.170 – 10.3.229.171	10.3.229.171
87	10.3.229.172/31	10.3.229.172 – 10.3.229.173	10.3.229.173
88	10.3.229.174/31	10.3.229.174 – 10.3.229.175	10.3.229.175
89	10.3.229.176/31	10.3.229.176 – 10.3.229.177	10.3.229.177
90	10.3.229.178/31	10.3.229.178 – 10.3.229.179	10.3.229.179
91	10.3.229.180/31	10.3.229.180 – 10.3.229.181	10.3.229.181
92	10.3.229.182/31	10.3.229.182 – 10.3.229.183	10.3.229.183
93	10.3.229.184/31	10.3.229.184 – 10.3.229.185	10.3.229.185
94	10.3.229.186/31	10.3.229.186 – 10.3.229.187	10.3.229.187
95	10.3.229.188/31	10.3.229.188 – 10.3.229.189	10.3.229.189
96	10.3.229.190/31	10.3.229.190 – 10.3.229.191	10.3.229.191
97	10.3.229.192/31	10.3.229.192 – 10.3.229.193	10.3.229.193
98	10.3.229.194/31	10.3.229.194 – 10.3.229.195	10.3.229.195
99	10.3.229.196/31	10.3.229.196 – 10.3.229.197	10.3.229.197
100	10.3.229.198/31	10.3.229.198 – 10.3.229.199	10.3.229.199
101	10.3.229.200/31	10.3.229.200 – 10.3.229.201	10.3.229.201
102	10.3.229.202/31	10.3.229.202 – 10.3.229.203	10.3.229.203
103	10.3.229.204/31	10.3.229.204 – 10.3.229.205	10.3.229.205
104	10.3.229.206/31	10.3.229.206 – 10.3.229.207	10.3.229.207
105	10.3.229.208/31	10.3.229.208 – 10.3.229.209	10.3.229.209
106	10.3.229.210/31	10.3.229.210 – 10.3.229.211	10.3.229.211
107	10.3.229.212/31	10.3.229.212 – 10.3.229.213	10.3.229.213
108	10.3.229.214/31	10.3.229.214 – 10.3.229.215	10.3.229.215
109	10.3.229.216/31	10.3.229.216 – 10.3.229.217	10.3.229.217
110	10.3.229.218/31	10.3.229.218 – 10.3.229.219	10.3.229.219
111	10.3.229.220/31	10.3.229.220 – 10.3.229.221	10.3.229.221
112	10.3.229.222/31	10.3.229.222 – 10.3.229.223	10.3.229.223
113	10.3.229.224/31	10.3.229.224 – 10.3.229.225	10.3.229.225
114	10.3.229.226/31	10.3.229.226 – 10.3.229.227	10.3.229.227
115	10.3.229.228/31	10.3.229.228 – 10.3.229.229	10.3.229.229
116	10.3.229.230/31	10.3.229.230 – 10.3.229.231	10.3.229.231
117	10.3.229.232/31	10.3.229.232 – 10.3.229.233	10.3.229.233
118	10.3.229.234/31	10.3.229.234 – 10.3.229.235	10.3.229.235
119	10.3.229.236/31	10.3.229.236 – 10.3.229.237	10.3.229.237
120	10.3.229.238/31	10.3.229.238 – 10.3.229.239	10.3.229.239
121	10.3.229.240/31	10.3.229.240 – 10.3.229.241	10.3.229.241
122	10.3.229.242/31	10.3.229.242 – 10.3.229.243	10.3.229.243
123	10.3.229.244/31	10.3.229.244 – 10.3.229.245	10.3.229.245
124	10.3.229.246/31	10.3.229.246 – 10.3.229.247	10.3.229.247
125	10.3.229.248/31	10.3.229.248 – 10.3.229.249	10.3.229.249
126	10.3.229.250/31	10.3.229.250 – 10.3.229.251	10.3.229.251
127	10.3.229.252/31	10.3.229.252 – 10.3.229.253	10.3.229.253
128	10.3.229.254/31	10.3.229.254 – 10.3.229.255	10.3.229.255

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 →