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)10.78.210.0/24

network10.78.210.0/24

broadcast10.78.210.255

first host10.78.210.1

last host10.78.210.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.210.0/24

address00001010.01001110.11010010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.11010010.00000000

broadcast00001010.01001110.11010010.11111111

green = network part, grey = host part

hex0x0a4ed200

decimal172937728

reverse dns0.210.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:d200

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.78.210.0/31	10.78.210.0 – 10.78.210.1	10.78.210.1
2	10.78.210.2/31	10.78.210.2 – 10.78.210.3	10.78.210.3
3	10.78.210.4/31	10.78.210.4 – 10.78.210.5	10.78.210.5
4	10.78.210.6/31	10.78.210.6 – 10.78.210.7	10.78.210.7
5	10.78.210.8/31	10.78.210.8 – 10.78.210.9	10.78.210.9
6	10.78.210.10/31	10.78.210.10 – 10.78.210.11	10.78.210.11
7	10.78.210.12/31	10.78.210.12 – 10.78.210.13	10.78.210.13
8	10.78.210.14/31	10.78.210.14 – 10.78.210.15	10.78.210.15
9	10.78.210.16/31	10.78.210.16 – 10.78.210.17	10.78.210.17
10	10.78.210.18/31	10.78.210.18 – 10.78.210.19	10.78.210.19
11	10.78.210.20/31	10.78.210.20 – 10.78.210.21	10.78.210.21
12	10.78.210.22/31	10.78.210.22 – 10.78.210.23	10.78.210.23
13	10.78.210.24/31	10.78.210.24 – 10.78.210.25	10.78.210.25
14	10.78.210.26/31	10.78.210.26 – 10.78.210.27	10.78.210.27
15	10.78.210.28/31	10.78.210.28 – 10.78.210.29	10.78.210.29
16	10.78.210.30/31	10.78.210.30 – 10.78.210.31	10.78.210.31
17	10.78.210.32/31	10.78.210.32 – 10.78.210.33	10.78.210.33
18	10.78.210.34/31	10.78.210.34 – 10.78.210.35	10.78.210.35
19	10.78.210.36/31	10.78.210.36 – 10.78.210.37	10.78.210.37
20	10.78.210.38/31	10.78.210.38 – 10.78.210.39	10.78.210.39
21	10.78.210.40/31	10.78.210.40 – 10.78.210.41	10.78.210.41
22	10.78.210.42/31	10.78.210.42 – 10.78.210.43	10.78.210.43
23	10.78.210.44/31	10.78.210.44 – 10.78.210.45	10.78.210.45
24	10.78.210.46/31	10.78.210.46 – 10.78.210.47	10.78.210.47
25	10.78.210.48/31	10.78.210.48 – 10.78.210.49	10.78.210.49
26	10.78.210.50/31	10.78.210.50 – 10.78.210.51	10.78.210.51
27	10.78.210.52/31	10.78.210.52 – 10.78.210.53	10.78.210.53
28	10.78.210.54/31	10.78.210.54 – 10.78.210.55	10.78.210.55
29	10.78.210.56/31	10.78.210.56 – 10.78.210.57	10.78.210.57
30	10.78.210.58/31	10.78.210.58 – 10.78.210.59	10.78.210.59
31	10.78.210.60/31	10.78.210.60 – 10.78.210.61	10.78.210.61
32	10.78.210.62/31	10.78.210.62 – 10.78.210.63	10.78.210.63
33	10.78.210.64/31	10.78.210.64 – 10.78.210.65	10.78.210.65
34	10.78.210.66/31	10.78.210.66 – 10.78.210.67	10.78.210.67
35	10.78.210.68/31	10.78.210.68 – 10.78.210.69	10.78.210.69
36	10.78.210.70/31	10.78.210.70 – 10.78.210.71	10.78.210.71
37	10.78.210.72/31	10.78.210.72 – 10.78.210.73	10.78.210.73
38	10.78.210.74/31	10.78.210.74 – 10.78.210.75	10.78.210.75
39	10.78.210.76/31	10.78.210.76 – 10.78.210.77	10.78.210.77
40	10.78.210.78/31	10.78.210.78 – 10.78.210.79	10.78.210.79
41	10.78.210.80/31	10.78.210.80 – 10.78.210.81	10.78.210.81
42	10.78.210.82/31	10.78.210.82 – 10.78.210.83	10.78.210.83
43	10.78.210.84/31	10.78.210.84 – 10.78.210.85	10.78.210.85
44	10.78.210.86/31	10.78.210.86 – 10.78.210.87	10.78.210.87
45	10.78.210.88/31	10.78.210.88 – 10.78.210.89	10.78.210.89
46	10.78.210.90/31	10.78.210.90 – 10.78.210.91	10.78.210.91
47	10.78.210.92/31	10.78.210.92 – 10.78.210.93	10.78.210.93
48	10.78.210.94/31	10.78.210.94 – 10.78.210.95	10.78.210.95
49	10.78.210.96/31	10.78.210.96 – 10.78.210.97	10.78.210.97
50	10.78.210.98/31	10.78.210.98 – 10.78.210.99	10.78.210.99
51	10.78.210.100/31	10.78.210.100 – 10.78.210.101	10.78.210.101
52	10.78.210.102/31	10.78.210.102 – 10.78.210.103	10.78.210.103
53	10.78.210.104/31	10.78.210.104 – 10.78.210.105	10.78.210.105
54	10.78.210.106/31	10.78.210.106 – 10.78.210.107	10.78.210.107
55	10.78.210.108/31	10.78.210.108 – 10.78.210.109	10.78.210.109
56	10.78.210.110/31	10.78.210.110 – 10.78.210.111	10.78.210.111
57	10.78.210.112/31	10.78.210.112 – 10.78.210.113	10.78.210.113
58	10.78.210.114/31	10.78.210.114 – 10.78.210.115	10.78.210.115
59	10.78.210.116/31	10.78.210.116 – 10.78.210.117	10.78.210.117
60	10.78.210.118/31	10.78.210.118 – 10.78.210.119	10.78.210.119
61	10.78.210.120/31	10.78.210.120 – 10.78.210.121	10.78.210.121
62	10.78.210.122/31	10.78.210.122 – 10.78.210.123	10.78.210.123
63	10.78.210.124/31	10.78.210.124 – 10.78.210.125	10.78.210.125
64	10.78.210.126/31	10.78.210.126 – 10.78.210.127	10.78.210.127
65	10.78.210.128/31	10.78.210.128 – 10.78.210.129	10.78.210.129
66	10.78.210.130/31	10.78.210.130 – 10.78.210.131	10.78.210.131
67	10.78.210.132/31	10.78.210.132 – 10.78.210.133	10.78.210.133
68	10.78.210.134/31	10.78.210.134 – 10.78.210.135	10.78.210.135
69	10.78.210.136/31	10.78.210.136 – 10.78.210.137	10.78.210.137
70	10.78.210.138/31	10.78.210.138 – 10.78.210.139	10.78.210.139
71	10.78.210.140/31	10.78.210.140 – 10.78.210.141	10.78.210.141
72	10.78.210.142/31	10.78.210.142 – 10.78.210.143	10.78.210.143
73	10.78.210.144/31	10.78.210.144 – 10.78.210.145	10.78.210.145
74	10.78.210.146/31	10.78.210.146 – 10.78.210.147	10.78.210.147
75	10.78.210.148/31	10.78.210.148 – 10.78.210.149	10.78.210.149
76	10.78.210.150/31	10.78.210.150 – 10.78.210.151	10.78.210.151
77	10.78.210.152/31	10.78.210.152 – 10.78.210.153	10.78.210.153
78	10.78.210.154/31	10.78.210.154 – 10.78.210.155	10.78.210.155
79	10.78.210.156/31	10.78.210.156 – 10.78.210.157	10.78.210.157
80	10.78.210.158/31	10.78.210.158 – 10.78.210.159	10.78.210.159
81	10.78.210.160/31	10.78.210.160 – 10.78.210.161	10.78.210.161
82	10.78.210.162/31	10.78.210.162 – 10.78.210.163	10.78.210.163
83	10.78.210.164/31	10.78.210.164 – 10.78.210.165	10.78.210.165
84	10.78.210.166/31	10.78.210.166 – 10.78.210.167	10.78.210.167
85	10.78.210.168/31	10.78.210.168 – 10.78.210.169	10.78.210.169
86	10.78.210.170/31	10.78.210.170 – 10.78.210.171	10.78.210.171
87	10.78.210.172/31	10.78.210.172 – 10.78.210.173	10.78.210.173
88	10.78.210.174/31	10.78.210.174 – 10.78.210.175	10.78.210.175
89	10.78.210.176/31	10.78.210.176 – 10.78.210.177	10.78.210.177
90	10.78.210.178/31	10.78.210.178 – 10.78.210.179	10.78.210.179
91	10.78.210.180/31	10.78.210.180 – 10.78.210.181	10.78.210.181
92	10.78.210.182/31	10.78.210.182 – 10.78.210.183	10.78.210.183
93	10.78.210.184/31	10.78.210.184 – 10.78.210.185	10.78.210.185
94	10.78.210.186/31	10.78.210.186 – 10.78.210.187	10.78.210.187
95	10.78.210.188/31	10.78.210.188 – 10.78.210.189	10.78.210.189
96	10.78.210.190/31	10.78.210.190 – 10.78.210.191	10.78.210.191
97	10.78.210.192/31	10.78.210.192 – 10.78.210.193	10.78.210.193
98	10.78.210.194/31	10.78.210.194 – 10.78.210.195	10.78.210.195
99	10.78.210.196/31	10.78.210.196 – 10.78.210.197	10.78.210.197
100	10.78.210.198/31	10.78.210.198 – 10.78.210.199	10.78.210.199
101	10.78.210.200/31	10.78.210.200 – 10.78.210.201	10.78.210.201
102	10.78.210.202/31	10.78.210.202 – 10.78.210.203	10.78.210.203
103	10.78.210.204/31	10.78.210.204 – 10.78.210.205	10.78.210.205
104	10.78.210.206/31	10.78.210.206 – 10.78.210.207	10.78.210.207
105	10.78.210.208/31	10.78.210.208 – 10.78.210.209	10.78.210.209
106	10.78.210.210/31	10.78.210.210 – 10.78.210.211	10.78.210.211
107	10.78.210.212/31	10.78.210.212 – 10.78.210.213	10.78.210.213
108	10.78.210.214/31	10.78.210.214 – 10.78.210.215	10.78.210.215
109	10.78.210.216/31	10.78.210.216 – 10.78.210.217	10.78.210.217
110	10.78.210.218/31	10.78.210.218 – 10.78.210.219	10.78.210.219
111	10.78.210.220/31	10.78.210.220 – 10.78.210.221	10.78.210.221
112	10.78.210.222/31	10.78.210.222 – 10.78.210.223	10.78.210.223
113	10.78.210.224/31	10.78.210.224 – 10.78.210.225	10.78.210.225
114	10.78.210.226/31	10.78.210.226 – 10.78.210.227	10.78.210.227
115	10.78.210.228/31	10.78.210.228 – 10.78.210.229	10.78.210.229
116	10.78.210.230/31	10.78.210.230 – 10.78.210.231	10.78.210.231
117	10.78.210.232/31	10.78.210.232 – 10.78.210.233	10.78.210.233
118	10.78.210.234/31	10.78.210.234 – 10.78.210.235	10.78.210.235
119	10.78.210.236/31	10.78.210.236 – 10.78.210.237	10.78.210.237
120	10.78.210.238/31	10.78.210.238 – 10.78.210.239	10.78.210.239
121	10.78.210.240/31	10.78.210.240 – 10.78.210.241	10.78.210.241
122	10.78.210.242/31	10.78.210.242 – 10.78.210.243	10.78.210.243
123	10.78.210.244/31	10.78.210.244 – 10.78.210.245	10.78.210.245
124	10.78.210.246/31	10.78.210.246 – 10.78.210.247	10.78.210.247
125	10.78.210.248/31	10.78.210.248 – 10.78.210.249	10.78.210.249
126	10.78.210.250/31	10.78.210.250 – 10.78.210.251	10.78.210.251
127	10.78.210.252/31	10.78.210.252 – 10.78.210.253	10.78.210.253
128	10.78.210.254/31	10.78.210.254 – 10.78.210.255	10.78.210.255

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 →