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)10.78.246.0/24

network10.78.246.0/24

broadcast10.78.246.255

first host10.78.246.1

last host10.78.246.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.246.0/24

address00001010.01001110.11110110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.11110110.00000000

broadcast00001010.01001110.11110110.11111111

green = network part, grey = host part

hex0x0a4ef600

decimal172946944

reverse dns0.246.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:f600

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.78.246.0/31	10.78.246.0 – 10.78.246.1	10.78.246.1
2	10.78.246.2/31	10.78.246.2 – 10.78.246.3	10.78.246.3
3	10.78.246.4/31	10.78.246.4 – 10.78.246.5	10.78.246.5
4	10.78.246.6/31	10.78.246.6 – 10.78.246.7	10.78.246.7
5	10.78.246.8/31	10.78.246.8 – 10.78.246.9	10.78.246.9
6	10.78.246.10/31	10.78.246.10 – 10.78.246.11	10.78.246.11
7	10.78.246.12/31	10.78.246.12 – 10.78.246.13	10.78.246.13
8	10.78.246.14/31	10.78.246.14 – 10.78.246.15	10.78.246.15
9	10.78.246.16/31	10.78.246.16 – 10.78.246.17	10.78.246.17
10	10.78.246.18/31	10.78.246.18 – 10.78.246.19	10.78.246.19
11	10.78.246.20/31	10.78.246.20 – 10.78.246.21	10.78.246.21
12	10.78.246.22/31	10.78.246.22 – 10.78.246.23	10.78.246.23
13	10.78.246.24/31	10.78.246.24 – 10.78.246.25	10.78.246.25
14	10.78.246.26/31	10.78.246.26 – 10.78.246.27	10.78.246.27
15	10.78.246.28/31	10.78.246.28 – 10.78.246.29	10.78.246.29
16	10.78.246.30/31	10.78.246.30 – 10.78.246.31	10.78.246.31
17	10.78.246.32/31	10.78.246.32 – 10.78.246.33	10.78.246.33
18	10.78.246.34/31	10.78.246.34 – 10.78.246.35	10.78.246.35
19	10.78.246.36/31	10.78.246.36 – 10.78.246.37	10.78.246.37
20	10.78.246.38/31	10.78.246.38 – 10.78.246.39	10.78.246.39
21	10.78.246.40/31	10.78.246.40 – 10.78.246.41	10.78.246.41
22	10.78.246.42/31	10.78.246.42 – 10.78.246.43	10.78.246.43
23	10.78.246.44/31	10.78.246.44 – 10.78.246.45	10.78.246.45
24	10.78.246.46/31	10.78.246.46 – 10.78.246.47	10.78.246.47
25	10.78.246.48/31	10.78.246.48 – 10.78.246.49	10.78.246.49
26	10.78.246.50/31	10.78.246.50 – 10.78.246.51	10.78.246.51
27	10.78.246.52/31	10.78.246.52 – 10.78.246.53	10.78.246.53
28	10.78.246.54/31	10.78.246.54 – 10.78.246.55	10.78.246.55
29	10.78.246.56/31	10.78.246.56 – 10.78.246.57	10.78.246.57
30	10.78.246.58/31	10.78.246.58 – 10.78.246.59	10.78.246.59
31	10.78.246.60/31	10.78.246.60 – 10.78.246.61	10.78.246.61
32	10.78.246.62/31	10.78.246.62 – 10.78.246.63	10.78.246.63
33	10.78.246.64/31	10.78.246.64 – 10.78.246.65	10.78.246.65
34	10.78.246.66/31	10.78.246.66 – 10.78.246.67	10.78.246.67
35	10.78.246.68/31	10.78.246.68 – 10.78.246.69	10.78.246.69
36	10.78.246.70/31	10.78.246.70 – 10.78.246.71	10.78.246.71
37	10.78.246.72/31	10.78.246.72 – 10.78.246.73	10.78.246.73
38	10.78.246.74/31	10.78.246.74 – 10.78.246.75	10.78.246.75
39	10.78.246.76/31	10.78.246.76 – 10.78.246.77	10.78.246.77
40	10.78.246.78/31	10.78.246.78 – 10.78.246.79	10.78.246.79
41	10.78.246.80/31	10.78.246.80 – 10.78.246.81	10.78.246.81
42	10.78.246.82/31	10.78.246.82 – 10.78.246.83	10.78.246.83
43	10.78.246.84/31	10.78.246.84 – 10.78.246.85	10.78.246.85
44	10.78.246.86/31	10.78.246.86 – 10.78.246.87	10.78.246.87
45	10.78.246.88/31	10.78.246.88 – 10.78.246.89	10.78.246.89
46	10.78.246.90/31	10.78.246.90 – 10.78.246.91	10.78.246.91
47	10.78.246.92/31	10.78.246.92 – 10.78.246.93	10.78.246.93
48	10.78.246.94/31	10.78.246.94 – 10.78.246.95	10.78.246.95
49	10.78.246.96/31	10.78.246.96 – 10.78.246.97	10.78.246.97
50	10.78.246.98/31	10.78.246.98 – 10.78.246.99	10.78.246.99
51	10.78.246.100/31	10.78.246.100 – 10.78.246.101	10.78.246.101
52	10.78.246.102/31	10.78.246.102 – 10.78.246.103	10.78.246.103
53	10.78.246.104/31	10.78.246.104 – 10.78.246.105	10.78.246.105
54	10.78.246.106/31	10.78.246.106 – 10.78.246.107	10.78.246.107
55	10.78.246.108/31	10.78.246.108 – 10.78.246.109	10.78.246.109
56	10.78.246.110/31	10.78.246.110 – 10.78.246.111	10.78.246.111
57	10.78.246.112/31	10.78.246.112 – 10.78.246.113	10.78.246.113
58	10.78.246.114/31	10.78.246.114 – 10.78.246.115	10.78.246.115
59	10.78.246.116/31	10.78.246.116 – 10.78.246.117	10.78.246.117
60	10.78.246.118/31	10.78.246.118 – 10.78.246.119	10.78.246.119
61	10.78.246.120/31	10.78.246.120 – 10.78.246.121	10.78.246.121
62	10.78.246.122/31	10.78.246.122 – 10.78.246.123	10.78.246.123
63	10.78.246.124/31	10.78.246.124 – 10.78.246.125	10.78.246.125
64	10.78.246.126/31	10.78.246.126 – 10.78.246.127	10.78.246.127
65	10.78.246.128/31	10.78.246.128 – 10.78.246.129	10.78.246.129
66	10.78.246.130/31	10.78.246.130 – 10.78.246.131	10.78.246.131
67	10.78.246.132/31	10.78.246.132 – 10.78.246.133	10.78.246.133
68	10.78.246.134/31	10.78.246.134 – 10.78.246.135	10.78.246.135
69	10.78.246.136/31	10.78.246.136 – 10.78.246.137	10.78.246.137
70	10.78.246.138/31	10.78.246.138 – 10.78.246.139	10.78.246.139
71	10.78.246.140/31	10.78.246.140 – 10.78.246.141	10.78.246.141
72	10.78.246.142/31	10.78.246.142 – 10.78.246.143	10.78.246.143
73	10.78.246.144/31	10.78.246.144 – 10.78.246.145	10.78.246.145
74	10.78.246.146/31	10.78.246.146 – 10.78.246.147	10.78.246.147
75	10.78.246.148/31	10.78.246.148 – 10.78.246.149	10.78.246.149
76	10.78.246.150/31	10.78.246.150 – 10.78.246.151	10.78.246.151
77	10.78.246.152/31	10.78.246.152 – 10.78.246.153	10.78.246.153
78	10.78.246.154/31	10.78.246.154 – 10.78.246.155	10.78.246.155
79	10.78.246.156/31	10.78.246.156 – 10.78.246.157	10.78.246.157
80	10.78.246.158/31	10.78.246.158 – 10.78.246.159	10.78.246.159
81	10.78.246.160/31	10.78.246.160 – 10.78.246.161	10.78.246.161
82	10.78.246.162/31	10.78.246.162 – 10.78.246.163	10.78.246.163
83	10.78.246.164/31	10.78.246.164 – 10.78.246.165	10.78.246.165
84	10.78.246.166/31	10.78.246.166 – 10.78.246.167	10.78.246.167
85	10.78.246.168/31	10.78.246.168 – 10.78.246.169	10.78.246.169
86	10.78.246.170/31	10.78.246.170 – 10.78.246.171	10.78.246.171
87	10.78.246.172/31	10.78.246.172 – 10.78.246.173	10.78.246.173
88	10.78.246.174/31	10.78.246.174 – 10.78.246.175	10.78.246.175
89	10.78.246.176/31	10.78.246.176 – 10.78.246.177	10.78.246.177
90	10.78.246.178/31	10.78.246.178 – 10.78.246.179	10.78.246.179
91	10.78.246.180/31	10.78.246.180 – 10.78.246.181	10.78.246.181
92	10.78.246.182/31	10.78.246.182 – 10.78.246.183	10.78.246.183
93	10.78.246.184/31	10.78.246.184 – 10.78.246.185	10.78.246.185
94	10.78.246.186/31	10.78.246.186 – 10.78.246.187	10.78.246.187
95	10.78.246.188/31	10.78.246.188 – 10.78.246.189	10.78.246.189
96	10.78.246.190/31	10.78.246.190 – 10.78.246.191	10.78.246.191
97	10.78.246.192/31	10.78.246.192 – 10.78.246.193	10.78.246.193
98	10.78.246.194/31	10.78.246.194 – 10.78.246.195	10.78.246.195
99	10.78.246.196/31	10.78.246.196 – 10.78.246.197	10.78.246.197
100	10.78.246.198/31	10.78.246.198 – 10.78.246.199	10.78.246.199
101	10.78.246.200/31	10.78.246.200 – 10.78.246.201	10.78.246.201
102	10.78.246.202/31	10.78.246.202 – 10.78.246.203	10.78.246.203
103	10.78.246.204/31	10.78.246.204 – 10.78.246.205	10.78.246.205
104	10.78.246.206/31	10.78.246.206 – 10.78.246.207	10.78.246.207
105	10.78.246.208/31	10.78.246.208 – 10.78.246.209	10.78.246.209
106	10.78.246.210/31	10.78.246.210 – 10.78.246.211	10.78.246.211
107	10.78.246.212/31	10.78.246.212 – 10.78.246.213	10.78.246.213
108	10.78.246.214/31	10.78.246.214 – 10.78.246.215	10.78.246.215
109	10.78.246.216/31	10.78.246.216 – 10.78.246.217	10.78.246.217
110	10.78.246.218/31	10.78.246.218 – 10.78.246.219	10.78.246.219
111	10.78.246.220/31	10.78.246.220 – 10.78.246.221	10.78.246.221
112	10.78.246.222/31	10.78.246.222 – 10.78.246.223	10.78.246.223
113	10.78.246.224/31	10.78.246.224 – 10.78.246.225	10.78.246.225
114	10.78.246.226/31	10.78.246.226 – 10.78.246.227	10.78.246.227
115	10.78.246.228/31	10.78.246.228 – 10.78.246.229	10.78.246.229
116	10.78.246.230/31	10.78.246.230 – 10.78.246.231	10.78.246.231
117	10.78.246.232/31	10.78.246.232 – 10.78.246.233	10.78.246.233
118	10.78.246.234/31	10.78.246.234 – 10.78.246.235	10.78.246.235
119	10.78.246.236/31	10.78.246.236 – 10.78.246.237	10.78.246.237
120	10.78.246.238/31	10.78.246.238 – 10.78.246.239	10.78.246.239
121	10.78.246.240/31	10.78.246.240 – 10.78.246.241	10.78.246.241
122	10.78.246.242/31	10.78.246.242 – 10.78.246.243	10.78.246.243
123	10.78.246.244/31	10.78.246.244 – 10.78.246.245	10.78.246.245
124	10.78.246.246/31	10.78.246.246 – 10.78.246.247	10.78.246.247
125	10.78.246.248/31	10.78.246.248 – 10.78.246.249	10.78.246.249
126	10.78.246.250/31	10.78.246.250 – 10.78.246.251	10.78.246.251
127	10.78.246.252/31	10.78.246.252 – 10.78.246.253	10.78.246.253
128	10.78.246.254/31	10.78.246.254 – 10.78.246.255	10.78.246.255

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 →