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)10.78.95.0/24

network10.78.95.0/24

broadcast10.78.95.255

first host10.78.95.1

last host10.78.95.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.95.0/24

address00001010.01001110.01011111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.01011111.00000000

broadcast00001010.01001110.01011111.11111111

green = network part, grey = host part

hex0x0a4e5f00

decimal172908288

reverse dns0.95.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:5f00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.78.95.0/31	10.78.95.0 – 10.78.95.1	10.78.95.1
2	10.78.95.2/31	10.78.95.2 – 10.78.95.3	10.78.95.3
3	10.78.95.4/31	10.78.95.4 – 10.78.95.5	10.78.95.5
4	10.78.95.6/31	10.78.95.6 – 10.78.95.7	10.78.95.7
5	10.78.95.8/31	10.78.95.8 – 10.78.95.9	10.78.95.9
6	10.78.95.10/31	10.78.95.10 – 10.78.95.11	10.78.95.11
7	10.78.95.12/31	10.78.95.12 – 10.78.95.13	10.78.95.13
8	10.78.95.14/31	10.78.95.14 – 10.78.95.15	10.78.95.15
9	10.78.95.16/31	10.78.95.16 – 10.78.95.17	10.78.95.17
10	10.78.95.18/31	10.78.95.18 – 10.78.95.19	10.78.95.19
11	10.78.95.20/31	10.78.95.20 – 10.78.95.21	10.78.95.21
12	10.78.95.22/31	10.78.95.22 – 10.78.95.23	10.78.95.23
13	10.78.95.24/31	10.78.95.24 – 10.78.95.25	10.78.95.25
14	10.78.95.26/31	10.78.95.26 – 10.78.95.27	10.78.95.27
15	10.78.95.28/31	10.78.95.28 – 10.78.95.29	10.78.95.29
16	10.78.95.30/31	10.78.95.30 – 10.78.95.31	10.78.95.31
17	10.78.95.32/31	10.78.95.32 – 10.78.95.33	10.78.95.33
18	10.78.95.34/31	10.78.95.34 – 10.78.95.35	10.78.95.35
19	10.78.95.36/31	10.78.95.36 – 10.78.95.37	10.78.95.37
20	10.78.95.38/31	10.78.95.38 – 10.78.95.39	10.78.95.39
21	10.78.95.40/31	10.78.95.40 – 10.78.95.41	10.78.95.41
22	10.78.95.42/31	10.78.95.42 – 10.78.95.43	10.78.95.43
23	10.78.95.44/31	10.78.95.44 – 10.78.95.45	10.78.95.45
24	10.78.95.46/31	10.78.95.46 – 10.78.95.47	10.78.95.47
25	10.78.95.48/31	10.78.95.48 – 10.78.95.49	10.78.95.49
26	10.78.95.50/31	10.78.95.50 – 10.78.95.51	10.78.95.51
27	10.78.95.52/31	10.78.95.52 – 10.78.95.53	10.78.95.53
28	10.78.95.54/31	10.78.95.54 – 10.78.95.55	10.78.95.55
29	10.78.95.56/31	10.78.95.56 – 10.78.95.57	10.78.95.57
30	10.78.95.58/31	10.78.95.58 – 10.78.95.59	10.78.95.59
31	10.78.95.60/31	10.78.95.60 – 10.78.95.61	10.78.95.61
32	10.78.95.62/31	10.78.95.62 – 10.78.95.63	10.78.95.63
33	10.78.95.64/31	10.78.95.64 – 10.78.95.65	10.78.95.65
34	10.78.95.66/31	10.78.95.66 – 10.78.95.67	10.78.95.67
35	10.78.95.68/31	10.78.95.68 – 10.78.95.69	10.78.95.69
36	10.78.95.70/31	10.78.95.70 – 10.78.95.71	10.78.95.71
37	10.78.95.72/31	10.78.95.72 – 10.78.95.73	10.78.95.73
38	10.78.95.74/31	10.78.95.74 – 10.78.95.75	10.78.95.75
39	10.78.95.76/31	10.78.95.76 – 10.78.95.77	10.78.95.77
40	10.78.95.78/31	10.78.95.78 – 10.78.95.79	10.78.95.79
41	10.78.95.80/31	10.78.95.80 – 10.78.95.81	10.78.95.81
42	10.78.95.82/31	10.78.95.82 – 10.78.95.83	10.78.95.83
43	10.78.95.84/31	10.78.95.84 – 10.78.95.85	10.78.95.85
44	10.78.95.86/31	10.78.95.86 – 10.78.95.87	10.78.95.87
45	10.78.95.88/31	10.78.95.88 – 10.78.95.89	10.78.95.89
46	10.78.95.90/31	10.78.95.90 – 10.78.95.91	10.78.95.91
47	10.78.95.92/31	10.78.95.92 – 10.78.95.93	10.78.95.93
48	10.78.95.94/31	10.78.95.94 – 10.78.95.95	10.78.95.95
49	10.78.95.96/31	10.78.95.96 – 10.78.95.97	10.78.95.97
50	10.78.95.98/31	10.78.95.98 – 10.78.95.99	10.78.95.99
51	10.78.95.100/31	10.78.95.100 – 10.78.95.101	10.78.95.101
52	10.78.95.102/31	10.78.95.102 – 10.78.95.103	10.78.95.103
53	10.78.95.104/31	10.78.95.104 – 10.78.95.105	10.78.95.105
54	10.78.95.106/31	10.78.95.106 – 10.78.95.107	10.78.95.107
55	10.78.95.108/31	10.78.95.108 – 10.78.95.109	10.78.95.109
56	10.78.95.110/31	10.78.95.110 – 10.78.95.111	10.78.95.111
57	10.78.95.112/31	10.78.95.112 – 10.78.95.113	10.78.95.113
58	10.78.95.114/31	10.78.95.114 – 10.78.95.115	10.78.95.115
59	10.78.95.116/31	10.78.95.116 – 10.78.95.117	10.78.95.117
60	10.78.95.118/31	10.78.95.118 – 10.78.95.119	10.78.95.119
61	10.78.95.120/31	10.78.95.120 – 10.78.95.121	10.78.95.121
62	10.78.95.122/31	10.78.95.122 – 10.78.95.123	10.78.95.123
63	10.78.95.124/31	10.78.95.124 – 10.78.95.125	10.78.95.125
64	10.78.95.126/31	10.78.95.126 – 10.78.95.127	10.78.95.127
65	10.78.95.128/31	10.78.95.128 – 10.78.95.129	10.78.95.129
66	10.78.95.130/31	10.78.95.130 – 10.78.95.131	10.78.95.131
67	10.78.95.132/31	10.78.95.132 – 10.78.95.133	10.78.95.133
68	10.78.95.134/31	10.78.95.134 – 10.78.95.135	10.78.95.135
69	10.78.95.136/31	10.78.95.136 – 10.78.95.137	10.78.95.137
70	10.78.95.138/31	10.78.95.138 – 10.78.95.139	10.78.95.139
71	10.78.95.140/31	10.78.95.140 – 10.78.95.141	10.78.95.141
72	10.78.95.142/31	10.78.95.142 – 10.78.95.143	10.78.95.143
73	10.78.95.144/31	10.78.95.144 – 10.78.95.145	10.78.95.145
74	10.78.95.146/31	10.78.95.146 – 10.78.95.147	10.78.95.147
75	10.78.95.148/31	10.78.95.148 – 10.78.95.149	10.78.95.149
76	10.78.95.150/31	10.78.95.150 – 10.78.95.151	10.78.95.151
77	10.78.95.152/31	10.78.95.152 – 10.78.95.153	10.78.95.153
78	10.78.95.154/31	10.78.95.154 – 10.78.95.155	10.78.95.155
79	10.78.95.156/31	10.78.95.156 – 10.78.95.157	10.78.95.157
80	10.78.95.158/31	10.78.95.158 – 10.78.95.159	10.78.95.159
81	10.78.95.160/31	10.78.95.160 – 10.78.95.161	10.78.95.161
82	10.78.95.162/31	10.78.95.162 – 10.78.95.163	10.78.95.163
83	10.78.95.164/31	10.78.95.164 – 10.78.95.165	10.78.95.165
84	10.78.95.166/31	10.78.95.166 – 10.78.95.167	10.78.95.167
85	10.78.95.168/31	10.78.95.168 – 10.78.95.169	10.78.95.169
86	10.78.95.170/31	10.78.95.170 – 10.78.95.171	10.78.95.171
87	10.78.95.172/31	10.78.95.172 – 10.78.95.173	10.78.95.173
88	10.78.95.174/31	10.78.95.174 – 10.78.95.175	10.78.95.175
89	10.78.95.176/31	10.78.95.176 – 10.78.95.177	10.78.95.177
90	10.78.95.178/31	10.78.95.178 – 10.78.95.179	10.78.95.179
91	10.78.95.180/31	10.78.95.180 – 10.78.95.181	10.78.95.181
92	10.78.95.182/31	10.78.95.182 – 10.78.95.183	10.78.95.183
93	10.78.95.184/31	10.78.95.184 – 10.78.95.185	10.78.95.185
94	10.78.95.186/31	10.78.95.186 – 10.78.95.187	10.78.95.187
95	10.78.95.188/31	10.78.95.188 – 10.78.95.189	10.78.95.189
96	10.78.95.190/31	10.78.95.190 – 10.78.95.191	10.78.95.191
97	10.78.95.192/31	10.78.95.192 – 10.78.95.193	10.78.95.193
98	10.78.95.194/31	10.78.95.194 – 10.78.95.195	10.78.95.195
99	10.78.95.196/31	10.78.95.196 – 10.78.95.197	10.78.95.197
100	10.78.95.198/31	10.78.95.198 – 10.78.95.199	10.78.95.199
101	10.78.95.200/31	10.78.95.200 – 10.78.95.201	10.78.95.201
102	10.78.95.202/31	10.78.95.202 – 10.78.95.203	10.78.95.203
103	10.78.95.204/31	10.78.95.204 – 10.78.95.205	10.78.95.205
104	10.78.95.206/31	10.78.95.206 – 10.78.95.207	10.78.95.207
105	10.78.95.208/31	10.78.95.208 – 10.78.95.209	10.78.95.209
106	10.78.95.210/31	10.78.95.210 – 10.78.95.211	10.78.95.211
107	10.78.95.212/31	10.78.95.212 – 10.78.95.213	10.78.95.213
108	10.78.95.214/31	10.78.95.214 – 10.78.95.215	10.78.95.215
109	10.78.95.216/31	10.78.95.216 – 10.78.95.217	10.78.95.217
110	10.78.95.218/31	10.78.95.218 – 10.78.95.219	10.78.95.219
111	10.78.95.220/31	10.78.95.220 – 10.78.95.221	10.78.95.221
112	10.78.95.222/31	10.78.95.222 – 10.78.95.223	10.78.95.223
113	10.78.95.224/31	10.78.95.224 – 10.78.95.225	10.78.95.225
114	10.78.95.226/31	10.78.95.226 – 10.78.95.227	10.78.95.227
115	10.78.95.228/31	10.78.95.228 – 10.78.95.229	10.78.95.229
116	10.78.95.230/31	10.78.95.230 – 10.78.95.231	10.78.95.231
117	10.78.95.232/31	10.78.95.232 – 10.78.95.233	10.78.95.233
118	10.78.95.234/31	10.78.95.234 – 10.78.95.235	10.78.95.235
119	10.78.95.236/31	10.78.95.236 – 10.78.95.237	10.78.95.237
120	10.78.95.238/31	10.78.95.238 – 10.78.95.239	10.78.95.239
121	10.78.95.240/31	10.78.95.240 – 10.78.95.241	10.78.95.241
122	10.78.95.242/31	10.78.95.242 – 10.78.95.243	10.78.95.243
123	10.78.95.244/31	10.78.95.244 – 10.78.95.245	10.78.95.245
124	10.78.95.246/31	10.78.95.246 – 10.78.95.247	10.78.95.247
125	10.78.95.248/31	10.78.95.248 – 10.78.95.249	10.78.95.249
126	10.78.95.250/31	10.78.95.250 – 10.78.95.251	10.78.95.251
127	10.78.95.252/31	10.78.95.252 – 10.78.95.253	10.78.95.253
128	10.78.95.254/31	10.78.95.254 – 10.78.95.255	10.78.95.255

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 →