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)10.3.60.0/24

network10.3.60.0/24

broadcast10.3.60.255

first host10.3.60.1

last host10.3.60.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.3.60.0/24

address00001010.00000011.00111100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000011.00111100.00000000

broadcast00001010.00000011.00111100.11111111

green = network part, grey = host part

hex0x0a033c00

decimal167984128

reverse dns0.60.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3c00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.60.0/31	10.3.60.0 – 10.3.60.1	10.3.60.1
2	10.3.60.2/31	10.3.60.2 – 10.3.60.3	10.3.60.3
3	10.3.60.4/31	10.3.60.4 – 10.3.60.5	10.3.60.5
4	10.3.60.6/31	10.3.60.6 – 10.3.60.7	10.3.60.7
5	10.3.60.8/31	10.3.60.8 – 10.3.60.9	10.3.60.9
6	10.3.60.10/31	10.3.60.10 – 10.3.60.11	10.3.60.11
7	10.3.60.12/31	10.3.60.12 – 10.3.60.13	10.3.60.13
8	10.3.60.14/31	10.3.60.14 – 10.3.60.15	10.3.60.15
9	10.3.60.16/31	10.3.60.16 – 10.3.60.17	10.3.60.17
10	10.3.60.18/31	10.3.60.18 – 10.3.60.19	10.3.60.19
11	10.3.60.20/31	10.3.60.20 – 10.3.60.21	10.3.60.21
12	10.3.60.22/31	10.3.60.22 – 10.3.60.23	10.3.60.23
13	10.3.60.24/31	10.3.60.24 – 10.3.60.25	10.3.60.25
14	10.3.60.26/31	10.3.60.26 – 10.3.60.27	10.3.60.27
15	10.3.60.28/31	10.3.60.28 – 10.3.60.29	10.3.60.29
16	10.3.60.30/31	10.3.60.30 – 10.3.60.31	10.3.60.31
17	10.3.60.32/31	10.3.60.32 – 10.3.60.33	10.3.60.33
18	10.3.60.34/31	10.3.60.34 – 10.3.60.35	10.3.60.35
19	10.3.60.36/31	10.3.60.36 – 10.3.60.37	10.3.60.37
20	10.3.60.38/31	10.3.60.38 – 10.3.60.39	10.3.60.39
21	10.3.60.40/31	10.3.60.40 – 10.3.60.41	10.3.60.41
22	10.3.60.42/31	10.3.60.42 – 10.3.60.43	10.3.60.43
23	10.3.60.44/31	10.3.60.44 – 10.3.60.45	10.3.60.45
24	10.3.60.46/31	10.3.60.46 – 10.3.60.47	10.3.60.47
25	10.3.60.48/31	10.3.60.48 – 10.3.60.49	10.3.60.49
26	10.3.60.50/31	10.3.60.50 – 10.3.60.51	10.3.60.51
27	10.3.60.52/31	10.3.60.52 – 10.3.60.53	10.3.60.53
28	10.3.60.54/31	10.3.60.54 – 10.3.60.55	10.3.60.55
29	10.3.60.56/31	10.3.60.56 – 10.3.60.57	10.3.60.57
30	10.3.60.58/31	10.3.60.58 – 10.3.60.59	10.3.60.59
31	10.3.60.60/31	10.3.60.60 – 10.3.60.61	10.3.60.61
32	10.3.60.62/31	10.3.60.62 – 10.3.60.63	10.3.60.63
33	10.3.60.64/31	10.3.60.64 – 10.3.60.65	10.3.60.65
34	10.3.60.66/31	10.3.60.66 – 10.3.60.67	10.3.60.67
35	10.3.60.68/31	10.3.60.68 – 10.3.60.69	10.3.60.69
36	10.3.60.70/31	10.3.60.70 – 10.3.60.71	10.3.60.71
37	10.3.60.72/31	10.3.60.72 – 10.3.60.73	10.3.60.73
38	10.3.60.74/31	10.3.60.74 – 10.3.60.75	10.3.60.75
39	10.3.60.76/31	10.3.60.76 – 10.3.60.77	10.3.60.77
40	10.3.60.78/31	10.3.60.78 – 10.3.60.79	10.3.60.79
41	10.3.60.80/31	10.3.60.80 – 10.3.60.81	10.3.60.81
42	10.3.60.82/31	10.3.60.82 – 10.3.60.83	10.3.60.83
43	10.3.60.84/31	10.3.60.84 – 10.3.60.85	10.3.60.85
44	10.3.60.86/31	10.3.60.86 – 10.3.60.87	10.3.60.87
45	10.3.60.88/31	10.3.60.88 – 10.3.60.89	10.3.60.89
46	10.3.60.90/31	10.3.60.90 – 10.3.60.91	10.3.60.91
47	10.3.60.92/31	10.3.60.92 – 10.3.60.93	10.3.60.93
48	10.3.60.94/31	10.3.60.94 – 10.3.60.95	10.3.60.95
49	10.3.60.96/31	10.3.60.96 – 10.3.60.97	10.3.60.97
50	10.3.60.98/31	10.3.60.98 – 10.3.60.99	10.3.60.99
51	10.3.60.100/31	10.3.60.100 – 10.3.60.101	10.3.60.101
52	10.3.60.102/31	10.3.60.102 – 10.3.60.103	10.3.60.103
53	10.3.60.104/31	10.3.60.104 – 10.3.60.105	10.3.60.105
54	10.3.60.106/31	10.3.60.106 – 10.3.60.107	10.3.60.107
55	10.3.60.108/31	10.3.60.108 – 10.3.60.109	10.3.60.109
56	10.3.60.110/31	10.3.60.110 – 10.3.60.111	10.3.60.111
57	10.3.60.112/31	10.3.60.112 – 10.3.60.113	10.3.60.113
58	10.3.60.114/31	10.3.60.114 – 10.3.60.115	10.3.60.115
59	10.3.60.116/31	10.3.60.116 – 10.3.60.117	10.3.60.117
60	10.3.60.118/31	10.3.60.118 – 10.3.60.119	10.3.60.119
61	10.3.60.120/31	10.3.60.120 – 10.3.60.121	10.3.60.121
62	10.3.60.122/31	10.3.60.122 – 10.3.60.123	10.3.60.123
63	10.3.60.124/31	10.3.60.124 – 10.3.60.125	10.3.60.125
64	10.3.60.126/31	10.3.60.126 – 10.3.60.127	10.3.60.127
65	10.3.60.128/31	10.3.60.128 – 10.3.60.129	10.3.60.129
66	10.3.60.130/31	10.3.60.130 – 10.3.60.131	10.3.60.131
67	10.3.60.132/31	10.3.60.132 – 10.3.60.133	10.3.60.133
68	10.3.60.134/31	10.3.60.134 – 10.3.60.135	10.3.60.135
69	10.3.60.136/31	10.3.60.136 – 10.3.60.137	10.3.60.137
70	10.3.60.138/31	10.3.60.138 – 10.3.60.139	10.3.60.139
71	10.3.60.140/31	10.3.60.140 – 10.3.60.141	10.3.60.141
72	10.3.60.142/31	10.3.60.142 – 10.3.60.143	10.3.60.143
73	10.3.60.144/31	10.3.60.144 – 10.3.60.145	10.3.60.145
74	10.3.60.146/31	10.3.60.146 – 10.3.60.147	10.3.60.147
75	10.3.60.148/31	10.3.60.148 – 10.3.60.149	10.3.60.149
76	10.3.60.150/31	10.3.60.150 – 10.3.60.151	10.3.60.151
77	10.3.60.152/31	10.3.60.152 – 10.3.60.153	10.3.60.153
78	10.3.60.154/31	10.3.60.154 – 10.3.60.155	10.3.60.155
79	10.3.60.156/31	10.3.60.156 – 10.3.60.157	10.3.60.157
80	10.3.60.158/31	10.3.60.158 – 10.3.60.159	10.3.60.159
81	10.3.60.160/31	10.3.60.160 – 10.3.60.161	10.3.60.161
82	10.3.60.162/31	10.3.60.162 – 10.3.60.163	10.3.60.163
83	10.3.60.164/31	10.3.60.164 – 10.3.60.165	10.3.60.165
84	10.3.60.166/31	10.3.60.166 – 10.3.60.167	10.3.60.167
85	10.3.60.168/31	10.3.60.168 – 10.3.60.169	10.3.60.169
86	10.3.60.170/31	10.3.60.170 – 10.3.60.171	10.3.60.171
87	10.3.60.172/31	10.3.60.172 – 10.3.60.173	10.3.60.173
88	10.3.60.174/31	10.3.60.174 – 10.3.60.175	10.3.60.175
89	10.3.60.176/31	10.3.60.176 – 10.3.60.177	10.3.60.177
90	10.3.60.178/31	10.3.60.178 – 10.3.60.179	10.3.60.179
91	10.3.60.180/31	10.3.60.180 – 10.3.60.181	10.3.60.181
92	10.3.60.182/31	10.3.60.182 – 10.3.60.183	10.3.60.183
93	10.3.60.184/31	10.3.60.184 – 10.3.60.185	10.3.60.185
94	10.3.60.186/31	10.3.60.186 – 10.3.60.187	10.3.60.187
95	10.3.60.188/31	10.3.60.188 – 10.3.60.189	10.3.60.189
96	10.3.60.190/31	10.3.60.190 – 10.3.60.191	10.3.60.191
97	10.3.60.192/31	10.3.60.192 – 10.3.60.193	10.3.60.193
98	10.3.60.194/31	10.3.60.194 – 10.3.60.195	10.3.60.195
99	10.3.60.196/31	10.3.60.196 – 10.3.60.197	10.3.60.197
100	10.3.60.198/31	10.3.60.198 – 10.3.60.199	10.3.60.199
101	10.3.60.200/31	10.3.60.200 – 10.3.60.201	10.3.60.201
102	10.3.60.202/31	10.3.60.202 – 10.3.60.203	10.3.60.203
103	10.3.60.204/31	10.3.60.204 – 10.3.60.205	10.3.60.205
104	10.3.60.206/31	10.3.60.206 – 10.3.60.207	10.3.60.207
105	10.3.60.208/31	10.3.60.208 – 10.3.60.209	10.3.60.209
106	10.3.60.210/31	10.3.60.210 – 10.3.60.211	10.3.60.211
107	10.3.60.212/31	10.3.60.212 – 10.3.60.213	10.3.60.213
108	10.3.60.214/31	10.3.60.214 – 10.3.60.215	10.3.60.215
109	10.3.60.216/31	10.3.60.216 – 10.3.60.217	10.3.60.217
110	10.3.60.218/31	10.3.60.218 – 10.3.60.219	10.3.60.219
111	10.3.60.220/31	10.3.60.220 – 10.3.60.221	10.3.60.221
112	10.3.60.222/31	10.3.60.222 – 10.3.60.223	10.3.60.223
113	10.3.60.224/31	10.3.60.224 – 10.3.60.225	10.3.60.225
114	10.3.60.226/31	10.3.60.226 – 10.3.60.227	10.3.60.227
115	10.3.60.228/31	10.3.60.228 – 10.3.60.229	10.3.60.229
116	10.3.60.230/31	10.3.60.230 – 10.3.60.231	10.3.60.231
117	10.3.60.232/31	10.3.60.232 – 10.3.60.233	10.3.60.233
118	10.3.60.234/31	10.3.60.234 – 10.3.60.235	10.3.60.235
119	10.3.60.236/31	10.3.60.236 – 10.3.60.237	10.3.60.237
120	10.3.60.238/31	10.3.60.238 – 10.3.60.239	10.3.60.239
121	10.3.60.240/31	10.3.60.240 – 10.3.60.241	10.3.60.241
122	10.3.60.242/31	10.3.60.242 – 10.3.60.243	10.3.60.243
123	10.3.60.244/31	10.3.60.244 – 10.3.60.245	10.3.60.245
124	10.3.60.246/31	10.3.60.246 – 10.3.60.247	10.3.60.247
125	10.3.60.248/31	10.3.60.248 – 10.3.60.249	10.3.60.249
126	10.3.60.250/31	10.3.60.250 – 10.3.60.251	10.3.60.251
127	10.3.60.252/31	10.3.60.252 – 10.3.60.253	10.3.60.253
128	10.3.60.254/31	10.3.60.254 – 10.3.60.255	10.3.60.255

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 →