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)10.0.106.0/24

network10.0.106.0/24

broadcast10.0.106.255

first host10.0.106.1

last host10.0.106.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.106.0/24

address00001010.00000000.01101010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01101010.00000000

broadcast00001010.00000000.01101010.11111111

green = network part, grey = host part

hex0x0a006a00

decimal167799296

reverse dns0.106.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:6a00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.106.0/31	10.0.106.0 – 10.0.106.1	10.0.106.1
2	10.0.106.2/31	10.0.106.2 – 10.0.106.3	10.0.106.3
3	10.0.106.4/31	10.0.106.4 – 10.0.106.5	10.0.106.5
4	10.0.106.6/31	10.0.106.6 – 10.0.106.7	10.0.106.7
5	10.0.106.8/31	10.0.106.8 – 10.0.106.9	10.0.106.9
6	10.0.106.10/31	10.0.106.10 – 10.0.106.11	10.0.106.11
7	10.0.106.12/31	10.0.106.12 – 10.0.106.13	10.0.106.13
8	10.0.106.14/31	10.0.106.14 – 10.0.106.15	10.0.106.15
9	10.0.106.16/31	10.0.106.16 – 10.0.106.17	10.0.106.17
10	10.0.106.18/31	10.0.106.18 – 10.0.106.19	10.0.106.19
11	10.0.106.20/31	10.0.106.20 – 10.0.106.21	10.0.106.21
12	10.0.106.22/31	10.0.106.22 – 10.0.106.23	10.0.106.23
13	10.0.106.24/31	10.0.106.24 – 10.0.106.25	10.0.106.25
14	10.0.106.26/31	10.0.106.26 – 10.0.106.27	10.0.106.27
15	10.0.106.28/31	10.0.106.28 – 10.0.106.29	10.0.106.29
16	10.0.106.30/31	10.0.106.30 – 10.0.106.31	10.0.106.31
17	10.0.106.32/31	10.0.106.32 – 10.0.106.33	10.0.106.33
18	10.0.106.34/31	10.0.106.34 – 10.0.106.35	10.0.106.35
19	10.0.106.36/31	10.0.106.36 – 10.0.106.37	10.0.106.37
20	10.0.106.38/31	10.0.106.38 – 10.0.106.39	10.0.106.39
21	10.0.106.40/31	10.0.106.40 – 10.0.106.41	10.0.106.41
22	10.0.106.42/31	10.0.106.42 – 10.0.106.43	10.0.106.43
23	10.0.106.44/31	10.0.106.44 – 10.0.106.45	10.0.106.45
24	10.0.106.46/31	10.0.106.46 – 10.0.106.47	10.0.106.47
25	10.0.106.48/31	10.0.106.48 – 10.0.106.49	10.0.106.49
26	10.0.106.50/31	10.0.106.50 – 10.0.106.51	10.0.106.51
27	10.0.106.52/31	10.0.106.52 – 10.0.106.53	10.0.106.53
28	10.0.106.54/31	10.0.106.54 – 10.0.106.55	10.0.106.55
29	10.0.106.56/31	10.0.106.56 – 10.0.106.57	10.0.106.57
30	10.0.106.58/31	10.0.106.58 – 10.0.106.59	10.0.106.59
31	10.0.106.60/31	10.0.106.60 – 10.0.106.61	10.0.106.61
32	10.0.106.62/31	10.0.106.62 – 10.0.106.63	10.0.106.63
33	10.0.106.64/31	10.0.106.64 – 10.0.106.65	10.0.106.65
34	10.0.106.66/31	10.0.106.66 – 10.0.106.67	10.0.106.67
35	10.0.106.68/31	10.0.106.68 – 10.0.106.69	10.0.106.69
36	10.0.106.70/31	10.0.106.70 – 10.0.106.71	10.0.106.71
37	10.0.106.72/31	10.0.106.72 – 10.0.106.73	10.0.106.73
38	10.0.106.74/31	10.0.106.74 – 10.0.106.75	10.0.106.75
39	10.0.106.76/31	10.0.106.76 – 10.0.106.77	10.0.106.77
40	10.0.106.78/31	10.0.106.78 – 10.0.106.79	10.0.106.79
41	10.0.106.80/31	10.0.106.80 – 10.0.106.81	10.0.106.81
42	10.0.106.82/31	10.0.106.82 – 10.0.106.83	10.0.106.83
43	10.0.106.84/31	10.0.106.84 – 10.0.106.85	10.0.106.85
44	10.0.106.86/31	10.0.106.86 – 10.0.106.87	10.0.106.87
45	10.0.106.88/31	10.0.106.88 – 10.0.106.89	10.0.106.89
46	10.0.106.90/31	10.0.106.90 – 10.0.106.91	10.0.106.91
47	10.0.106.92/31	10.0.106.92 – 10.0.106.93	10.0.106.93
48	10.0.106.94/31	10.0.106.94 – 10.0.106.95	10.0.106.95
49	10.0.106.96/31	10.0.106.96 – 10.0.106.97	10.0.106.97
50	10.0.106.98/31	10.0.106.98 – 10.0.106.99	10.0.106.99
51	10.0.106.100/31	10.0.106.100 – 10.0.106.101	10.0.106.101
52	10.0.106.102/31	10.0.106.102 – 10.0.106.103	10.0.106.103
53	10.0.106.104/31	10.0.106.104 – 10.0.106.105	10.0.106.105
54	10.0.106.106/31	10.0.106.106 – 10.0.106.107	10.0.106.107
55	10.0.106.108/31	10.0.106.108 – 10.0.106.109	10.0.106.109
56	10.0.106.110/31	10.0.106.110 – 10.0.106.111	10.0.106.111
57	10.0.106.112/31	10.0.106.112 – 10.0.106.113	10.0.106.113
58	10.0.106.114/31	10.0.106.114 – 10.0.106.115	10.0.106.115
59	10.0.106.116/31	10.0.106.116 – 10.0.106.117	10.0.106.117
60	10.0.106.118/31	10.0.106.118 – 10.0.106.119	10.0.106.119
61	10.0.106.120/31	10.0.106.120 – 10.0.106.121	10.0.106.121
62	10.0.106.122/31	10.0.106.122 – 10.0.106.123	10.0.106.123
63	10.0.106.124/31	10.0.106.124 – 10.0.106.125	10.0.106.125
64	10.0.106.126/31	10.0.106.126 – 10.0.106.127	10.0.106.127
65	10.0.106.128/31	10.0.106.128 – 10.0.106.129	10.0.106.129
66	10.0.106.130/31	10.0.106.130 – 10.0.106.131	10.0.106.131
67	10.0.106.132/31	10.0.106.132 – 10.0.106.133	10.0.106.133
68	10.0.106.134/31	10.0.106.134 – 10.0.106.135	10.0.106.135
69	10.0.106.136/31	10.0.106.136 – 10.0.106.137	10.0.106.137
70	10.0.106.138/31	10.0.106.138 – 10.0.106.139	10.0.106.139
71	10.0.106.140/31	10.0.106.140 – 10.0.106.141	10.0.106.141
72	10.0.106.142/31	10.0.106.142 – 10.0.106.143	10.0.106.143
73	10.0.106.144/31	10.0.106.144 – 10.0.106.145	10.0.106.145
74	10.0.106.146/31	10.0.106.146 – 10.0.106.147	10.0.106.147
75	10.0.106.148/31	10.0.106.148 – 10.0.106.149	10.0.106.149
76	10.0.106.150/31	10.0.106.150 – 10.0.106.151	10.0.106.151
77	10.0.106.152/31	10.0.106.152 – 10.0.106.153	10.0.106.153
78	10.0.106.154/31	10.0.106.154 – 10.0.106.155	10.0.106.155
79	10.0.106.156/31	10.0.106.156 – 10.0.106.157	10.0.106.157
80	10.0.106.158/31	10.0.106.158 – 10.0.106.159	10.0.106.159
81	10.0.106.160/31	10.0.106.160 – 10.0.106.161	10.0.106.161
82	10.0.106.162/31	10.0.106.162 – 10.0.106.163	10.0.106.163
83	10.0.106.164/31	10.0.106.164 – 10.0.106.165	10.0.106.165
84	10.0.106.166/31	10.0.106.166 – 10.0.106.167	10.0.106.167
85	10.0.106.168/31	10.0.106.168 – 10.0.106.169	10.0.106.169
86	10.0.106.170/31	10.0.106.170 – 10.0.106.171	10.0.106.171
87	10.0.106.172/31	10.0.106.172 – 10.0.106.173	10.0.106.173
88	10.0.106.174/31	10.0.106.174 – 10.0.106.175	10.0.106.175
89	10.0.106.176/31	10.0.106.176 – 10.0.106.177	10.0.106.177
90	10.0.106.178/31	10.0.106.178 – 10.0.106.179	10.0.106.179
91	10.0.106.180/31	10.0.106.180 – 10.0.106.181	10.0.106.181
92	10.0.106.182/31	10.0.106.182 – 10.0.106.183	10.0.106.183
93	10.0.106.184/31	10.0.106.184 – 10.0.106.185	10.0.106.185
94	10.0.106.186/31	10.0.106.186 – 10.0.106.187	10.0.106.187
95	10.0.106.188/31	10.0.106.188 – 10.0.106.189	10.0.106.189
96	10.0.106.190/31	10.0.106.190 – 10.0.106.191	10.0.106.191
97	10.0.106.192/31	10.0.106.192 – 10.0.106.193	10.0.106.193
98	10.0.106.194/31	10.0.106.194 – 10.0.106.195	10.0.106.195
99	10.0.106.196/31	10.0.106.196 – 10.0.106.197	10.0.106.197
100	10.0.106.198/31	10.0.106.198 – 10.0.106.199	10.0.106.199
101	10.0.106.200/31	10.0.106.200 – 10.0.106.201	10.0.106.201
102	10.0.106.202/31	10.0.106.202 – 10.0.106.203	10.0.106.203
103	10.0.106.204/31	10.0.106.204 – 10.0.106.205	10.0.106.205
104	10.0.106.206/31	10.0.106.206 – 10.0.106.207	10.0.106.207
105	10.0.106.208/31	10.0.106.208 – 10.0.106.209	10.0.106.209
106	10.0.106.210/31	10.0.106.210 – 10.0.106.211	10.0.106.211
107	10.0.106.212/31	10.0.106.212 – 10.0.106.213	10.0.106.213
108	10.0.106.214/31	10.0.106.214 – 10.0.106.215	10.0.106.215
109	10.0.106.216/31	10.0.106.216 – 10.0.106.217	10.0.106.217
110	10.0.106.218/31	10.0.106.218 – 10.0.106.219	10.0.106.219
111	10.0.106.220/31	10.0.106.220 – 10.0.106.221	10.0.106.221
112	10.0.106.222/31	10.0.106.222 – 10.0.106.223	10.0.106.223
113	10.0.106.224/31	10.0.106.224 – 10.0.106.225	10.0.106.225
114	10.0.106.226/31	10.0.106.226 – 10.0.106.227	10.0.106.227
115	10.0.106.228/31	10.0.106.228 – 10.0.106.229	10.0.106.229
116	10.0.106.230/31	10.0.106.230 – 10.0.106.231	10.0.106.231
117	10.0.106.232/31	10.0.106.232 – 10.0.106.233	10.0.106.233
118	10.0.106.234/31	10.0.106.234 – 10.0.106.235	10.0.106.235
119	10.0.106.236/31	10.0.106.236 – 10.0.106.237	10.0.106.237
120	10.0.106.238/31	10.0.106.238 – 10.0.106.239	10.0.106.239
121	10.0.106.240/31	10.0.106.240 – 10.0.106.241	10.0.106.241
122	10.0.106.242/31	10.0.106.242 – 10.0.106.243	10.0.106.243
123	10.0.106.244/31	10.0.106.244 – 10.0.106.245	10.0.106.245
124	10.0.106.246/31	10.0.106.246 – 10.0.106.247	10.0.106.247
125	10.0.106.248/31	10.0.106.248 – 10.0.106.249	10.0.106.249
126	10.0.106.250/31	10.0.106.250 – 10.0.106.251	10.0.106.251
127	10.0.106.252/31	10.0.106.252 – 10.0.106.253	10.0.106.253
128	10.0.106.254/31	10.0.106.254 – 10.0.106.255	10.0.106.255

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 →