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)10.0.117.0/24

network10.0.117.0/24

broadcast10.0.117.255

first host10.0.117.1

last host10.0.117.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.117.0/24

address00001010.00000000.01110101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01110101.00000000

broadcast00001010.00000000.01110101.11111111

green = network part, grey = host part

hex0x0a007500

decimal167802112

reverse dns0.117.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:7500

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.117.0/31	10.0.117.0 – 10.0.117.1	10.0.117.1
2	10.0.117.2/31	10.0.117.2 – 10.0.117.3	10.0.117.3
3	10.0.117.4/31	10.0.117.4 – 10.0.117.5	10.0.117.5
4	10.0.117.6/31	10.0.117.6 – 10.0.117.7	10.0.117.7
5	10.0.117.8/31	10.0.117.8 – 10.0.117.9	10.0.117.9
6	10.0.117.10/31	10.0.117.10 – 10.0.117.11	10.0.117.11
7	10.0.117.12/31	10.0.117.12 – 10.0.117.13	10.0.117.13
8	10.0.117.14/31	10.0.117.14 – 10.0.117.15	10.0.117.15
9	10.0.117.16/31	10.0.117.16 – 10.0.117.17	10.0.117.17
10	10.0.117.18/31	10.0.117.18 – 10.0.117.19	10.0.117.19
11	10.0.117.20/31	10.0.117.20 – 10.0.117.21	10.0.117.21
12	10.0.117.22/31	10.0.117.22 – 10.0.117.23	10.0.117.23
13	10.0.117.24/31	10.0.117.24 – 10.0.117.25	10.0.117.25
14	10.0.117.26/31	10.0.117.26 – 10.0.117.27	10.0.117.27
15	10.0.117.28/31	10.0.117.28 – 10.0.117.29	10.0.117.29
16	10.0.117.30/31	10.0.117.30 – 10.0.117.31	10.0.117.31
17	10.0.117.32/31	10.0.117.32 – 10.0.117.33	10.0.117.33
18	10.0.117.34/31	10.0.117.34 – 10.0.117.35	10.0.117.35
19	10.0.117.36/31	10.0.117.36 – 10.0.117.37	10.0.117.37
20	10.0.117.38/31	10.0.117.38 – 10.0.117.39	10.0.117.39
21	10.0.117.40/31	10.0.117.40 – 10.0.117.41	10.0.117.41
22	10.0.117.42/31	10.0.117.42 – 10.0.117.43	10.0.117.43
23	10.0.117.44/31	10.0.117.44 – 10.0.117.45	10.0.117.45
24	10.0.117.46/31	10.0.117.46 – 10.0.117.47	10.0.117.47
25	10.0.117.48/31	10.0.117.48 – 10.0.117.49	10.0.117.49
26	10.0.117.50/31	10.0.117.50 – 10.0.117.51	10.0.117.51
27	10.0.117.52/31	10.0.117.52 – 10.0.117.53	10.0.117.53
28	10.0.117.54/31	10.0.117.54 – 10.0.117.55	10.0.117.55
29	10.0.117.56/31	10.0.117.56 – 10.0.117.57	10.0.117.57
30	10.0.117.58/31	10.0.117.58 – 10.0.117.59	10.0.117.59
31	10.0.117.60/31	10.0.117.60 – 10.0.117.61	10.0.117.61
32	10.0.117.62/31	10.0.117.62 – 10.0.117.63	10.0.117.63
33	10.0.117.64/31	10.0.117.64 – 10.0.117.65	10.0.117.65
34	10.0.117.66/31	10.0.117.66 – 10.0.117.67	10.0.117.67
35	10.0.117.68/31	10.0.117.68 – 10.0.117.69	10.0.117.69
36	10.0.117.70/31	10.0.117.70 – 10.0.117.71	10.0.117.71
37	10.0.117.72/31	10.0.117.72 – 10.0.117.73	10.0.117.73
38	10.0.117.74/31	10.0.117.74 – 10.0.117.75	10.0.117.75
39	10.0.117.76/31	10.0.117.76 – 10.0.117.77	10.0.117.77
40	10.0.117.78/31	10.0.117.78 – 10.0.117.79	10.0.117.79
41	10.0.117.80/31	10.0.117.80 – 10.0.117.81	10.0.117.81
42	10.0.117.82/31	10.0.117.82 – 10.0.117.83	10.0.117.83
43	10.0.117.84/31	10.0.117.84 – 10.0.117.85	10.0.117.85
44	10.0.117.86/31	10.0.117.86 – 10.0.117.87	10.0.117.87
45	10.0.117.88/31	10.0.117.88 – 10.0.117.89	10.0.117.89
46	10.0.117.90/31	10.0.117.90 – 10.0.117.91	10.0.117.91
47	10.0.117.92/31	10.0.117.92 – 10.0.117.93	10.0.117.93
48	10.0.117.94/31	10.0.117.94 – 10.0.117.95	10.0.117.95
49	10.0.117.96/31	10.0.117.96 – 10.0.117.97	10.0.117.97
50	10.0.117.98/31	10.0.117.98 – 10.0.117.99	10.0.117.99
51	10.0.117.100/31	10.0.117.100 – 10.0.117.101	10.0.117.101
52	10.0.117.102/31	10.0.117.102 – 10.0.117.103	10.0.117.103
53	10.0.117.104/31	10.0.117.104 – 10.0.117.105	10.0.117.105
54	10.0.117.106/31	10.0.117.106 – 10.0.117.107	10.0.117.107
55	10.0.117.108/31	10.0.117.108 – 10.0.117.109	10.0.117.109
56	10.0.117.110/31	10.0.117.110 – 10.0.117.111	10.0.117.111
57	10.0.117.112/31	10.0.117.112 – 10.0.117.113	10.0.117.113
58	10.0.117.114/31	10.0.117.114 – 10.0.117.115	10.0.117.115
59	10.0.117.116/31	10.0.117.116 – 10.0.117.117	10.0.117.117
60	10.0.117.118/31	10.0.117.118 – 10.0.117.119	10.0.117.119
61	10.0.117.120/31	10.0.117.120 – 10.0.117.121	10.0.117.121
62	10.0.117.122/31	10.0.117.122 – 10.0.117.123	10.0.117.123
63	10.0.117.124/31	10.0.117.124 – 10.0.117.125	10.0.117.125
64	10.0.117.126/31	10.0.117.126 – 10.0.117.127	10.0.117.127
65	10.0.117.128/31	10.0.117.128 – 10.0.117.129	10.0.117.129
66	10.0.117.130/31	10.0.117.130 – 10.0.117.131	10.0.117.131
67	10.0.117.132/31	10.0.117.132 – 10.0.117.133	10.0.117.133
68	10.0.117.134/31	10.0.117.134 – 10.0.117.135	10.0.117.135
69	10.0.117.136/31	10.0.117.136 – 10.0.117.137	10.0.117.137
70	10.0.117.138/31	10.0.117.138 – 10.0.117.139	10.0.117.139
71	10.0.117.140/31	10.0.117.140 – 10.0.117.141	10.0.117.141
72	10.0.117.142/31	10.0.117.142 – 10.0.117.143	10.0.117.143
73	10.0.117.144/31	10.0.117.144 – 10.0.117.145	10.0.117.145
74	10.0.117.146/31	10.0.117.146 – 10.0.117.147	10.0.117.147
75	10.0.117.148/31	10.0.117.148 – 10.0.117.149	10.0.117.149
76	10.0.117.150/31	10.0.117.150 – 10.0.117.151	10.0.117.151
77	10.0.117.152/31	10.0.117.152 – 10.0.117.153	10.0.117.153
78	10.0.117.154/31	10.0.117.154 – 10.0.117.155	10.0.117.155
79	10.0.117.156/31	10.0.117.156 – 10.0.117.157	10.0.117.157
80	10.0.117.158/31	10.0.117.158 – 10.0.117.159	10.0.117.159
81	10.0.117.160/31	10.0.117.160 – 10.0.117.161	10.0.117.161
82	10.0.117.162/31	10.0.117.162 – 10.0.117.163	10.0.117.163
83	10.0.117.164/31	10.0.117.164 – 10.0.117.165	10.0.117.165
84	10.0.117.166/31	10.0.117.166 – 10.0.117.167	10.0.117.167
85	10.0.117.168/31	10.0.117.168 – 10.0.117.169	10.0.117.169
86	10.0.117.170/31	10.0.117.170 – 10.0.117.171	10.0.117.171
87	10.0.117.172/31	10.0.117.172 – 10.0.117.173	10.0.117.173
88	10.0.117.174/31	10.0.117.174 – 10.0.117.175	10.0.117.175
89	10.0.117.176/31	10.0.117.176 – 10.0.117.177	10.0.117.177
90	10.0.117.178/31	10.0.117.178 – 10.0.117.179	10.0.117.179
91	10.0.117.180/31	10.0.117.180 – 10.0.117.181	10.0.117.181
92	10.0.117.182/31	10.0.117.182 – 10.0.117.183	10.0.117.183
93	10.0.117.184/31	10.0.117.184 – 10.0.117.185	10.0.117.185
94	10.0.117.186/31	10.0.117.186 – 10.0.117.187	10.0.117.187
95	10.0.117.188/31	10.0.117.188 – 10.0.117.189	10.0.117.189
96	10.0.117.190/31	10.0.117.190 – 10.0.117.191	10.0.117.191
97	10.0.117.192/31	10.0.117.192 – 10.0.117.193	10.0.117.193
98	10.0.117.194/31	10.0.117.194 – 10.0.117.195	10.0.117.195
99	10.0.117.196/31	10.0.117.196 – 10.0.117.197	10.0.117.197
100	10.0.117.198/31	10.0.117.198 – 10.0.117.199	10.0.117.199
101	10.0.117.200/31	10.0.117.200 – 10.0.117.201	10.0.117.201
102	10.0.117.202/31	10.0.117.202 – 10.0.117.203	10.0.117.203
103	10.0.117.204/31	10.0.117.204 – 10.0.117.205	10.0.117.205
104	10.0.117.206/31	10.0.117.206 – 10.0.117.207	10.0.117.207
105	10.0.117.208/31	10.0.117.208 – 10.0.117.209	10.0.117.209
106	10.0.117.210/31	10.0.117.210 – 10.0.117.211	10.0.117.211
107	10.0.117.212/31	10.0.117.212 – 10.0.117.213	10.0.117.213
108	10.0.117.214/31	10.0.117.214 – 10.0.117.215	10.0.117.215
109	10.0.117.216/31	10.0.117.216 – 10.0.117.217	10.0.117.217
110	10.0.117.218/31	10.0.117.218 – 10.0.117.219	10.0.117.219
111	10.0.117.220/31	10.0.117.220 – 10.0.117.221	10.0.117.221
112	10.0.117.222/31	10.0.117.222 – 10.0.117.223	10.0.117.223
113	10.0.117.224/31	10.0.117.224 – 10.0.117.225	10.0.117.225
114	10.0.117.226/31	10.0.117.226 – 10.0.117.227	10.0.117.227
115	10.0.117.228/31	10.0.117.228 – 10.0.117.229	10.0.117.229
116	10.0.117.230/31	10.0.117.230 – 10.0.117.231	10.0.117.231
117	10.0.117.232/31	10.0.117.232 – 10.0.117.233	10.0.117.233
118	10.0.117.234/31	10.0.117.234 – 10.0.117.235	10.0.117.235
119	10.0.117.236/31	10.0.117.236 – 10.0.117.237	10.0.117.237
120	10.0.117.238/31	10.0.117.238 – 10.0.117.239	10.0.117.239
121	10.0.117.240/31	10.0.117.240 – 10.0.117.241	10.0.117.241
122	10.0.117.242/31	10.0.117.242 – 10.0.117.243	10.0.117.243
123	10.0.117.244/31	10.0.117.244 – 10.0.117.245	10.0.117.245
124	10.0.117.246/31	10.0.117.246 – 10.0.117.247	10.0.117.247
125	10.0.117.248/31	10.0.117.248 – 10.0.117.249	10.0.117.249
126	10.0.117.250/31	10.0.117.250 – 10.0.117.251	10.0.117.251
127	10.0.117.252/31	10.0.117.252 – 10.0.117.253	10.0.117.253
128	10.0.117.254/31	10.0.117.254 – 10.0.117.255	10.0.117.255

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 →