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)10.0.225.0/24

network10.0.225.0/24

broadcast10.0.225.255

first host10.0.225.1

last host10.0.225.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.225.0/24

address00001010.00000000.11100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11100001.00000000

broadcast00001010.00000000.11100001.11111111

green = network part, grey = host part

hex0x0a00e100

decimal167829760

reverse dns0.225.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:e100

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.225.0/31	10.0.225.0 – 10.0.225.1	10.0.225.1
2	10.0.225.2/31	10.0.225.2 – 10.0.225.3	10.0.225.3
3	10.0.225.4/31	10.0.225.4 – 10.0.225.5	10.0.225.5
4	10.0.225.6/31	10.0.225.6 – 10.0.225.7	10.0.225.7
5	10.0.225.8/31	10.0.225.8 – 10.0.225.9	10.0.225.9
6	10.0.225.10/31	10.0.225.10 – 10.0.225.11	10.0.225.11
7	10.0.225.12/31	10.0.225.12 – 10.0.225.13	10.0.225.13
8	10.0.225.14/31	10.0.225.14 – 10.0.225.15	10.0.225.15
9	10.0.225.16/31	10.0.225.16 – 10.0.225.17	10.0.225.17
10	10.0.225.18/31	10.0.225.18 – 10.0.225.19	10.0.225.19
11	10.0.225.20/31	10.0.225.20 – 10.0.225.21	10.0.225.21
12	10.0.225.22/31	10.0.225.22 – 10.0.225.23	10.0.225.23
13	10.0.225.24/31	10.0.225.24 – 10.0.225.25	10.0.225.25
14	10.0.225.26/31	10.0.225.26 – 10.0.225.27	10.0.225.27
15	10.0.225.28/31	10.0.225.28 – 10.0.225.29	10.0.225.29
16	10.0.225.30/31	10.0.225.30 – 10.0.225.31	10.0.225.31
17	10.0.225.32/31	10.0.225.32 – 10.0.225.33	10.0.225.33
18	10.0.225.34/31	10.0.225.34 – 10.0.225.35	10.0.225.35
19	10.0.225.36/31	10.0.225.36 – 10.0.225.37	10.0.225.37
20	10.0.225.38/31	10.0.225.38 – 10.0.225.39	10.0.225.39
21	10.0.225.40/31	10.0.225.40 – 10.0.225.41	10.0.225.41
22	10.0.225.42/31	10.0.225.42 – 10.0.225.43	10.0.225.43
23	10.0.225.44/31	10.0.225.44 – 10.0.225.45	10.0.225.45
24	10.0.225.46/31	10.0.225.46 – 10.0.225.47	10.0.225.47
25	10.0.225.48/31	10.0.225.48 – 10.0.225.49	10.0.225.49
26	10.0.225.50/31	10.0.225.50 – 10.0.225.51	10.0.225.51
27	10.0.225.52/31	10.0.225.52 – 10.0.225.53	10.0.225.53
28	10.0.225.54/31	10.0.225.54 – 10.0.225.55	10.0.225.55
29	10.0.225.56/31	10.0.225.56 – 10.0.225.57	10.0.225.57
30	10.0.225.58/31	10.0.225.58 – 10.0.225.59	10.0.225.59
31	10.0.225.60/31	10.0.225.60 – 10.0.225.61	10.0.225.61
32	10.0.225.62/31	10.0.225.62 – 10.0.225.63	10.0.225.63
33	10.0.225.64/31	10.0.225.64 – 10.0.225.65	10.0.225.65
34	10.0.225.66/31	10.0.225.66 – 10.0.225.67	10.0.225.67
35	10.0.225.68/31	10.0.225.68 – 10.0.225.69	10.0.225.69
36	10.0.225.70/31	10.0.225.70 – 10.0.225.71	10.0.225.71
37	10.0.225.72/31	10.0.225.72 – 10.0.225.73	10.0.225.73
38	10.0.225.74/31	10.0.225.74 – 10.0.225.75	10.0.225.75
39	10.0.225.76/31	10.0.225.76 – 10.0.225.77	10.0.225.77
40	10.0.225.78/31	10.0.225.78 – 10.0.225.79	10.0.225.79
41	10.0.225.80/31	10.0.225.80 – 10.0.225.81	10.0.225.81
42	10.0.225.82/31	10.0.225.82 – 10.0.225.83	10.0.225.83
43	10.0.225.84/31	10.0.225.84 – 10.0.225.85	10.0.225.85
44	10.0.225.86/31	10.0.225.86 – 10.0.225.87	10.0.225.87
45	10.0.225.88/31	10.0.225.88 – 10.0.225.89	10.0.225.89
46	10.0.225.90/31	10.0.225.90 – 10.0.225.91	10.0.225.91
47	10.0.225.92/31	10.0.225.92 – 10.0.225.93	10.0.225.93
48	10.0.225.94/31	10.0.225.94 – 10.0.225.95	10.0.225.95
49	10.0.225.96/31	10.0.225.96 – 10.0.225.97	10.0.225.97
50	10.0.225.98/31	10.0.225.98 – 10.0.225.99	10.0.225.99
51	10.0.225.100/31	10.0.225.100 – 10.0.225.101	10.0.225.101
52	10.0.225.102/31	10.0.225.102 – 10.0.225.103	10.0.225.103
53	10.0.225.104/31	10.0.225.104 – 10.0.225.105	10.0.225.105
54	10.0.225.106/31	10.0.225.106 – 10.0.225.107	10.0.225.107
55	10.0.225.108/31	10.0.225.108 – 10.0.225.109	10.0.225.109
56	10.0.225.110/31	10.0.225.110 – 10.0.225.111	10.0.225.111
57	10.0.225.112/31	10.0.225.112 – 10.0.225.113	10.0.225.113
58	10.0.225.114/31	10.0.225.114 – 10.0.225.115	10.0.225.115
59	10.0.225.116/31	10.0.225.116 – 10.0.225.117	10.0.225.117
60	10.0.225.118/31	10.0.225.118 – 10.0.225.119	10.0.225.119
61	10.0.225.120/31	10.0.225.120 – 10.0.225.121	10.0.225.121
62	10.0.225.122/31	10.0.225.122 – 10.0.225.123	10.0.225.123
63	10.0.225.124/31	10.0.225.124 – 10.0.225.125	10.0.225.125
64	10.0.225.126/31	10.0.225.126 – 10.0.225.127	10.0.225.127
65	10.0.225.128/31	10.0.225.128 – 10.0.225.129	10.0.225.129
66	10.0.225.130/31	10.0.225.130 – 10.0.225.131	10.0.225.131
67	10.0.225.132/31	10.0.225.132 – 10.0.225.133	10.0.225.133
68	10.0.225.134/31	10.0.225.134 – 10.0.225.135	10.0.225.135
69	10.0.225.136/31	10.0.225.136 – 10.0.225.137	10.0.225.137
70	10.0.225.138/31	10.0.225.138 – 10.0.225.139	10.0.225.139
71	10.0.225.140/31	10.0.225.140 – 10.0.225.141	10.0.225.141
72	10.0.225.142/31	10.0.225.142 – 10.0.225.143	10.0.225.143
73	10.0.225.144/31	10.0.225.144 – 10.0.225.145	10.0.225.145
74	10.0.225.146/31	10.0.225.146 – 10.0.225.147	10.0.225.147
75	10.0.225.148/31	10.0.225.148 – 10.0.225.149	10.0.225.149
76	10.0.225.150/31	10.0.225.150 – 10.0.225.151	10.0.225.151
77	10.0.225.152/31	10.0.225.152 – 10.0.225.153	10.0.225.153
78	10.0.225.154/31	10.0.225.154 – 10.0.225.155	10.0.225.155
79	10.0.225.156/31	10.0.225.156 – 10.0.225.157	10.0.225.157
80	10.0.225.158/31	10.0.225.158 – 10.0.225.159	10.0.225.159
81	10.0.225.160/31	10.0.225.160 – 10.0.225.161	10.0.225.161
82	10.0.225.162/31	10.0.225.162 – 10.0.225.163	10.0.225.163
83	10.0.225.164/31	10.0.225.164 – 10.0.225.165	10.0.225.165
84	10.0.225.166/31	10.0.225.166 – 10.0.225.167	10.0.225.167
85	10.0.225.168/31	10.0.225.168 – 10.0.225.169	10.0.225.169
86	10.0.225.170/31	10.0.225.170 – 10.0.225.171	10.0.225.171
87	10.0.225.172/31	10.0.225.172 – 10.0.225.173	10.0.225.173
88	10.0.225.174/31	10.0.225.174 – 10.0.225.175	10.0.225.175
89	10.0.225.176/31	10.0.225.176 – 10.0.225.177	10.0.225.177
90	10.0.225.178/31	10.0.225.178 – 10.0.225.179	10.0.225.179
91	10.0.225.180/31	10.0.225.180 – 10.0.225.181	10.0.225.181
92	10.0.225.182/31	10.0.225.182 – 10.0.225.183	10.0.225.183
93	10.0.225.184/31	10.0.225.184 – 10.0.225.185	10.0.225.185
94	10.0.225.186/31	10.0.225.186 – 10.0.225.187	10.0.225.187
95	10.0.225.188/31	10.0.225.188 – 10.0.225.189	10.0.225.189
96	10.0.225.190/31	10.0.225.190 – 10.0.225.191	10.0.225.191
97	10.0.225.192/31	10.0.225.192 – 10.0.225.193	10.0.225.193
98	10.0.225.194/31	10.0.225.194 – 10.0.225.195	10.0.225.195
99	10.0.225.196/31	10.0.225.196 – 10.0.225.197	10.0.225.197
100	10.0.225.198/31	10.0.225.198 – 10.0.225.199	10.0.225.199
101	10.0.225.200/31	10.0.225.200 – 10.0.225.201	10.0.225.201
102	10.0.225.202/31	10.0.225.202 – 10.0.225.203	10.0.225.203
103	10.0.225.204/31	10.0.225.204 – 10.0.225.205	10.0.225.205
104	10.0.225.206/31	10.0.225.206 – 10.0.225.207	10.0.225.207
105	10.0.225.208/31	10.0.225.208 – 10.0.225.209	10.0.225.209
106	10.0.225.210/31	10.0.225.210 – 10.0.225.211	10.0.225.211
107	10.0.225.212/31	10.0.225.212 – 10.0.225.213	10.0.225.213
108	10.0.225.214/31	10.0.225.214 – 10.0.225.215	10.0.225.215
109	10.0.225.216/31	10.0.225.216 – 10.0.225.217	10.0.225.217
110	10.0.225.218/31	10.0.225.218 – 10.0.225.219	10.0.225.219
111	10.0.225.220/31	10.0.225.220 – 10.0.225.221	10.0.225.221
112	10.0.225.222/31	10.0.225.222 – 10.0.225.223	10.0.225.223
113	10.0.225.224/31	10.0.225.224 – 10.0.225.225	10.0.225.225
114	10.0.225.226/31	10.0.225.226 – 10.0.225.227	10.0.225.227
115	10.0.225.228/31	10.0.225.228 – 10.0.225.229	10.0.225.229
116	10.0.225.230/31	10.0.225.230 – 10.0.225.231	10.0.225.231
117	10.0.225.232/31	10.0.225.232 – 10.0.225.233	10.0.225.233
118	10.0.225.234/31	10.0.225.234 – 10.0.225.235	10.0.225.235
119	10.0.225.236/31	10.0.225.236 – 10.0.225.237	10.0.225.237
120	10.0.225.238/31	10.0.225.238 – 10.0.225.239	10.0.225.239
121	10.0.225.240/31	10.0.225.240 – 10.0.225.241	10.0.225.241
122	10.0.225.242/31	10.0.225.242 – 10.0.225.243	10.0.225.243
123	10.0.225.244/31	10.0.225.244 – 10.0.225.245	10.0.225.245
124	10.0.225.246/31	10.0.225.246 – 10.0.225.247	10.0.225.247
125	10.0.225.248/31	10.0.225.248 – 10.0.225.249	10.0.225.249
126	10.0.225.250/31	10.0.225.250 – 10.0.225.251	10.0.225.251
127	10.0.225.252/31	10.0.225.252 – 10.0.225.253	10.0.225.253
128	10.0.225.254/31	10.0.225.254 – 10.0.225.255	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 /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 →