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)10.0.76.0/24

network10.0.76.0/24

broadcast10.0.76.255

first host10.0.76.1

last host10.0.76.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.76.0/24

address00001010.00000000.01001100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01001100.00000000

broadcast00001010.00000000.01001100.11111111

green = network part, grey = host part

hex0x0a004c00

decimal167791616

reverse dns0.76.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:4c00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.76.0/31	10.0.76.0 – 10.0.76.1	10.0.76.1
2	10.0.76.2/31	10.0.76.2 – 10.0.76.3	10.0.76.3
3	10.0.76.4/31	10.0.76.4 – 10.0.76.5	10.0.76.5
4	10.0.76.6/31	10.0.76.6 – 10.0.76.7	10.0.76.7
5	10.0.76.8/31	10.0.76.8 – 10.0.76.9	10.0.76.9
6	10.0.76.10/31	10.0.76.10 – 10.0.76.11	10.0.76.11
7	10.0.76.12/31	10.0.76.12 – 10.0.76.13	10.0.76.13
8	10.0.76.14/31	10.0.76.14 – 10.0.76.15	10.0.76.15
9	10.0.76.16/31	10.0.76.16 – 10.0.76.17	10.0.76.17
10	10.0.76.18/31	10.0.76.18 – 10.0.76.19	10.0.76.19
11	10.0.76.20/31	10.0.76.20 – 10.0.76.21	10.0.76.21
12	10.0.76.22/31	10.0.76.22 – 10.0.76.23	10.0.76.23
13	10.0.76.24/31	10.0.76.24 – 10.0.76.25	10.0.76.25
14	10.0.76.26/31	10.0.76.26 – 10.0.76.27	10.0.76.27
15	10.0.76.28/31	10.0.76.28 – 10.0.76.29	10.0.76.29
16	10.0.76.30/31	10.0.76.30 – 10.0.76.31	10.0.76.31
17	10.0.76.32/31	10.0.76.32 – 10.0.76.33	10.0.76.33
18	10.0.76.34/31	10.0.76.34 – 10.0.76.35	10.0.76.35
19	10.0.76.36/31	10.0.76.36 – 10.0.76.37	10.0.76.37
20	10.0.76.38/31	10.0.76.38 – 10.0.76.39	10.0.76.39
21	10.0.76.40/31	10.0.76.40 – 10.0.76.41	10.0.76.41
22	10.0.76.42/31	10.0.76.42 – 10.0.76.43	10.0.76.43
23	10.0.76.44/31	10.0.76.44 – 10.0.76.45	10.0.76.45
24	10.0.76.46/31	10.0.76.46 – 10.0.76.47	10.0.76.47
25	10.0.76.48/31	10.0.76.48 – 10.0.76.49	10.0.76.49
26	10.0.76.50/31	10.0.76.50 – 10.0.76.51	10.0.76.51
27	10.0.76.52/31	10.0.76.52 – 10.0.76.53	10.0.76.53
28	10.0.76.54/31	10.0.76.54 – 10.0.76.55	10.0.76.55
29	10.0.76.56/31	10.0.76.56 – 10.0.76.57	10.0.76.57
30	10.0.76.58/31	10.0.76.58 – 10.0.76.59	10.0.76.59
31	10.0.76.60/31	10.0.76.60 – 10.0.76.61	10.0.76.61
32	10.0.76.62/31	10.0.76.62 – 10.0.76.63	10.0.76.63
33	10.0.76.64/31	10.0.76.64 – 10.0.76.65	10.0.76.65
34	10.0.76.66/31	10.0.76.66 – 10.0.76.67	10.0.76.67
35	10.0.76.68/31	10.0.76.68 – 10.0.76.69	10.0.76.69
36	10.0.76.70/31	10.0.76.70 – 10.0.76.71	10.0.76.71
37	10.0.76.72/31	10.0.76.72 – 10.0.76.73	10.0.76.73
38	10.0.76.74/31	10.0.76.74 – 10.0.76.75	10.0.76.75
39	10.0.76.76/31	10.0.76.76 – 10.0.76.77	10.0.76.77
40	10.0.76.78/31	10.0.76.78 – 10.0.76.79	10.0.76.79
41	10.0.76.80/31	10.0.76.80 – 10.0.76.81	10.0.76.81
42	10.0.76.82/31	10.0.76.82 – 10.0.76.83	10.0.76.83
43	10.0.76.84/31	10.0.76.84 – 10.0.76.85	10.0.76.85
44	10.0.76.86/31	10.0.76.86 – 10.0.76.87	10.0.76.87
45	10.0.76.88/31	10.0.76.88 – 10.0.76.89	10.0.76.89
46	10.0.76.90/31	10.0.76.90 – 10.0.76.91	10.0.76.91
47	10.0.76.92/31	10.0.76.92 – 10.0.76.93	10.0.76.93
48	10.0.76.94/31	10.0.76.94 – 10.0.76.95	10.0.76.95
49	10.0.76.96/31	10.0.76.96 – 10.0.76.97	10.0.76.97
50	10.0.76.98/31	10.0.76.98 – 10.0.76.99	10.0.76.99
51	10.0.76.100/31	10.0.76.100 – 10.0.76.101	10.0.76.101
52	10.0.76.102/31	10.0.76.102 – 10.0.76.103	10.0.76.103
53	10.0.76.104/31	10.0.76.104 – 10.0.76.105	10.0.76.105
54	10.0.76.106/31	10.0.76.106 – 10.0.76.107	10.0.76.107
55	10.0.76.108/31	10.0.76.108 – 10.0.76.109	10.0.76.109
56	10.0.76.110/31	10.0.76.110 – 10.0.76.111	10.0.76.111
57	10.0.76.112/31	10.0.76.112 – 10.0.76.113	10.0.76.113
58	10.0.76.114/31	10.0.76.114 – 10.0.76.115	10.0.76.115
59	10.0.76.116/31	10.0.76.116 – 10.0.76.117	10.0.76.117
60	10.0.76.118/31	10.0.76.118 – 10.0.76.119	10.0.76.119
61	10.0.76.120/31	10.0.76.120 – 10.0.76.121	10.0.76.121
62	10.0.76.122/31	10.0.76.122 – 10.0.76.123	10.0.76.123
63	10.0.76.124/31	10.0.76.124 – 10.0.76.125	10.0.76.125
64	10.0.76.126/31	10.0.76.126 – 10.0.76.127	10.0.76.127
65	10.0.76.128/31	10.0.76.128 – 10.0.76.129	10.0.76.129
66	10.0.76.130/31	10.0.76.130 – 10.0.76.131	10.0.76.131
67	10.0.76.132/31	10.0.76.132 – 10.0.76.133	10.0.76.133
68	10.0.76.134/31	10.0.76.134 – 10.0.76.135	10.0.76.135
69	10.0.76.136/31	10.0.76.136 – 10.0.76.137	10.0.76.137
70	10.0.76.138/31	10.0.76.138 – 10.0.76.139	10.0.76.139
71	10.0.76.140/31	10.0.76.140 – 10.0.76.141	10.0.76.141
72	10.0.76.142/31	10.0.76.142 – 10.0.76.143	10.0.76.143
73	10.0.76.144/31	10.0.76.144 – 10.0.76.145	10.0.76.145
74	10.0.76.146/31	10.0.76.146 – 10.0.76.147	10.0.76.147
75	10.0.76.148/31	10.0.76.148 – 10.0.76.149	10.0.76.149
76	10.0.76.150/31	10.0.76.150 – 10.0.76.151	10.0.76.151
77	10.0.76.152/31	10.0.76.152 – 10.0.76.153	10.0.76.153
78	10.0.76.154/31	10.0.76.154 – 10.0.76.155	10.0.76.155
79	10.0.76.156/31	10.0.76.156 – 10.0.76.157	10.0.76.157
80	10.0.76.158/31	10.0.76.158 – 10.0.76.159	10.0.76.159
81	10.0.76.160/31	10.0.76.160 – 10.0.76.161	10.0.76.161
82	10.0.76.162/31	10.0.76.162 – 10.0.76.163	10.0.76.163
83	10.0.76.164/31	10.0.76.164 – 10.0.76.165	10.0.76.165
84	10.0.76.166/31	10.0.76.166 – 10.0.76.167	10.0.76.167
85	10.0.76.168/31	10.0.76.168 – 10.0.76.169	10.0.76.169
86	10.0.76.170/31	10.0.76.170 – 10.0.76.171	10.0.76.171
87	10.0.76.172/31	10.0.76.172 – 10.0.76.173	10.0.76.173
88	10.0.76.174/31	10.0.76.174 – 10.0.76.175	10.0.76.175
89	10.0.76.176/31	10.0.76.176 – 10.0.76.177	10.0.76.177
90	10.0.76.178/31	10.0.76.178 – 10.0.76.179	10.0.76.179
91	10.0.76.180/31	10.0.76.180 – 10.0.76.181	10.0.76.181
92	10.0.76.182/31	10.0.76.182 – 10.0.76.183	10.0.76.183
93	10.0.76.184/31	10.0.76.184 – 10.0.76.185	10.0.76.185
94	10.0.76.186/31	10.0.76.186 – 10.0.76.187	10.0.76.187
95	10.0.76.188/31	10.0.76.188 – 10.0.76.189	10.0.76.189
96	10.0.76.190/31	10.0.76.190 – 10.0.76.191	10.0.76.191
97	10.0.76.192/31	10.0.76.192 – 10.0.76.193	10.0.76.193
98	10.0.76.194/31	10.0.76.194 – 10.0.76.195	10.0.76.195
99	10.0.76.196/31	10.0.76.196 – 10.0.76.197	10.0.76.197
100	10.0.76.198/31	10.0.76.198 – 10.0.76.199	10.0.76.199
101	10.0.76.200/31	10.0.76.200 – 10.0.76.201	10.0.76.201
102	10.0.76.202/31	10.0.76.202 – 10.0.76.203	10.0.76.203
103	10.0.76.204/31	10.0.76.204 – 10.0.76.205	10.0.76.205
104	10.0.76.206/31	10.0.76.206 – 10.0.76.207	10.0.76.207
105	10.0.76.208/31	10.0.76.208 – 10.0.76.209	10.0.76.209
106	10.0.76.210/31	10.0.76.210 – 10.0.76.211	10.0.76.211
107	10.0.76.212/31	10.0.76.212 – 10.0.76.213	10.0.76.213
108	10.0.76.214/31	10.0.76.214 – 10.0.76.215	10.0.76.215
109	10.0.76.216/31	10.0.76.216 – 10.0.76.217	10.0.76.217
110	10.0.76.218/31	10.0.76.218 – 10.0.76.219	10.0.76.219
111	10.0.76.220/31	10.0.76.220 – 10.0.76.221	10.0.76.221
112	10.0.76.222/31	10.0.76.222 – 10.0.76.223	10.0.76.223
113	10.0.76.224/31	10.0.76.224 – 10.0.76.225	10.0.76.225
114	10.0.76.226/31	10.0.76.226 – 10.0.76.227	10.0.76.227
115	10.0.76.228/31	10.0.76.228 – 10.0.76.229	10.0.76.229
116	10.0.76.230/31	10.0.76.230 – 10.0.76.231	10.0.76.231
117	10.0.76.232/31	10.0.76.232 – 10.0.76.233	10.0.76.233
118	10.0.76.234/31	10.0.76.234 – 10.0.76.235	10.0.76.235
119	10.0.76.236/31	10.0.76.236 – 10.0.76.237	10.0.76.237
120	10.0.76.238/31	10.0.76.238 – 10.0.76.239	10.0.76.239
121	10.0.76.240/31	10.0.76.240 – 10.0.76.241	10.0.76.241
122	10.0.76.242/31	10.0.76.242 – 10.0.76.243	10.0.76.243
123	10.0.76.244/31	10.0.76.244 – 10.0.76.245	10.0.76.245
124	10.0.76.246/31	10.0.76.246 – 10.0.76.247	10.0.76.247
125	10.0.76.248/31	10.0.76.248 – 10.0.76.249	10.0.76.249
126	10.0.76.250/31	10.0.76.250 – 10.0.76.251	10.0.76.251
127	10.0.76.252/31	10.0.76.252 – 10.0.76.253	10.0.76.253
128	10.0.76.254/31	10.0.76.254 – 10.0.76.255	10.0.76.255

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 →