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)10.71.46.0/24

network10.71.46.0/24

broadcast10.71.46.255

first host10.71.46.1

last host10.71.46.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.71.46.0/24

address00001010.01000111.00101110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01000111.00101110.00000000

broadcast00001010.01000111.00101110.11111111

green = network part, grey = host part

hex0x0a472e00

decimal172436992

reverse dns0.46.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:2e00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.71.46.0/31	10.71.46.0 – 10.71.46.1	10.71.46.1
2	10.71.46.2/31	10.71.46.2 – 10.71.46.3	10.71.46.3
3	10.71.46.4/31	10.71.46.4 – 10.71.46.5	10.71.46.5
4	10.71.46.6/31	10.71.46.6 – 10.71.46.7	10.71.46.7
5	10.71.46.8/31	10.71.46.8 – 10.71.46.9	10.71.46.9
6	10.71.46.10/31	10.71.46.10 – 10.71.46.11	10.71.46.11
7	10.71.46.12/31	10.71.46.12 – 10.71.46.13	10.71.46.13
8	10.71.46.14/31	10.71.46.14 – 10.71.46.15	10.71.46.15
9	10.71.46.16/31	10.71.46.16 – 10.71.46.17	10.71.46.17
10	10.71.46.18/31	10.71.46.18 – 10.71.46.19	10.71.46.19
11	10.71.46.20/31	10.71.46.20 – 10.71.46.21	10.71.46.21
12	10.71.46.22/31	10.71.46.22 – 10.71.46.23	10.71.46.23
13	10.71.46.24/31	10.71.46.24 – 10.71.46.25	10.71.46.25
14	10.71.46.26/31	10.71.46.26 – 10.71.46.27	10.71.46.27
15	10.71.46.28/31	10.71.46.28 – 10.71.46.29	10.71.46.29
16	10.71.46.30/31	10.71.46.30 – 10.71.46.31	10.71.46.31
17	10.71.46.32/31	10.71.46.32 – 10.71.46.33	10.71.46.33
18	10.71.46.34/31	10.71.46.34 – 10.71.46.35	10.71.46.35
19	10.71.46.36/31	10.71.46.36 – 10.71.46.37	10.71.46.37
20	10.71.46.38/31	10.71.46.38 – 10.71.46.39	10.71.46.39
21	10.71.46.40/31	10.71.46.40 – 10.71.46.41	10.71.46.41
22	10.71.46.42/31	10.71.46.42 – 10.71.46.43	10.71.46.43
23	10.71.46.44/31	10.71.46.44 – 10.71.46.45	10.71.46.45
24	10.71.46.46/31	10.71.46.46 – 10.71.46.47	10.71.46.47
25	10.71.46.48/31	10.71.46.48 – 10.71.46.49	10.71.46.49
26	10.71.46.50/31	10.71.46.50 – 10.71.46.51	10.71.46.51
27	10.71.46.52/31	10.71.46.52 – 10.71.46.53	10.71.46.53
28	10.71.46.54/31	10.71.46.54 – 10.71.46.55	10.71.46.55
29	10.71.46.56/31	10.71.46.56 – 10.71.46.57	10.71.46.57
30	10.71.46.58/31	10.71.46.58 – 10.71.46.59	10.71.46.59
31	10.71.46.60/31	10.71.46.60 – 10.71.46.61	10.71.46.61
32	10.71.46.62/31	10.71.46.62 – 10.71.46.63	10.71.46.63
33	10.71.46.64/31	10.71.46.64 – 10.71.46.65	10.71.46.65
34	10.71.46.66/31	10.71.46.66 – 10.71.46.67	10.71.46.67
35	10.71.46.68/31	10.71.46.68 – 10.71.46.69	10.71.46.69
36	10.71.46.70/31	10.71.46.70 – 10.71.46.71	10.71.46.71
37	10.71.46.72/31	10.71.46.72 – 10.71.46.73	10.71.46.73
38	10.71.46.74/31	10.71.46.74 – 10.71.46.75	10.71.46.75
39	10.71.46.76/31	10.71.46.76 – 10.71.46.77	10.71.46.77
40	10.71.46.78/31	10.71.46.78 – 10.71.46.79	10.71.46.79
41	10.71.46.80/31	10.71.46.80 – 10.71.46.81	10.71.46.81
42	10.71.46.82/31	10.71.46.82 – 10.71.46.83	10.71.46.83
43	10.71.46.84/31	10.71.46.84 – 10.71.46.85	10.71.46.85
44	10.71.46.86/31	10.71.46.86 – 10.71.46.87	10.71.46.87
45	10.71.46.88/31	10.71.46.88 – 10.71.46.89	10.71.46.89
46	10.71.46.90/31	10.71.46.90 – 10.71.46.91	10.71.46.91
47	10.71.46.92/31	10.71.46.92 – 10.71.46.93	10.71.46.93
48	10.71.46.94/31	10.71.46.94 – 10.71.46.95	10.71.46.95
49	10.71.46.96/31	10.71.46.96 – 10.71.46.97	10.71.46.97
50	10.71.46.98/31	10.71.46.98 – 10.71.46.99	10.71.46.99
51	10.71.46.100/31	10.71.46.100 – 10.71.46.101	10.71.46.101
52	10.71.46.102/31	10.71.46.102 – 10.71.46.103	10.71.46.103
53	10.71.46.104/31	10.71.46.104 – 10.71.46.105	10.71.46.105
54	10.71.46.106/31	10.71.46.106 – 10.71.46.107	10.71.46.107
55	10.71.46.108/31	10.71.46.108 – 10.71.46.109	10.71.46.109
56	10.71.46.110/31	10.71.46.110 – 10.71.46.111	10.71.46.111
57	10.71.46.112/31	10.71.46.112 – 10.71.46.113	10.71.46.113
58	10.71.46.114/31	10.71.46.114 – 10.71.46.115	10.71.46.115
59	10.71.46.116/31	10.71.46.116 – 10.71.46.117	10.71.46.117
60	10.71.46.118/31	10.71.46.118 – 10.71.46.119	10.71.46.119
61	10.71.46.120/31	10.71.46.120 – 10.71.46.121	10.71.46.121
62	10.71.46.122/31	10.71.46.122 – 10.71.46.123	10.71.46.123
63	10.71.46.124/31	10.71.46.124 – 10.71.46.125	10.71.46.125
64	10.71.46.126/31	10.71.46.126 – 10.71.46.127	10.71.46.127
65	10.71.46.128/31	10.71.46.128 – 10.71.46.129	10.71.46.129
66	10.71.46.130/31	10.71.46.130 – 10.71.46.131	10.71.46.131
67	10.71.46.132/31	10.71.46.132 – 10.71.46.133	10.71.46.133
68	10.71.46.134/31	10.71.46.134 – 10.71.46.135	10.71.46.135
69	10.71.46.136/31	10.71.46.136 – 10.71.46.137	10.71.46.137
70	10.71.46.138/31	10.71.46.138 – 10.71.46.139	10.71.46.139
71	10.71.46.140/31	10.71.46.140 – 10.71.46.141	10.71.46.141
72	10.71.46.142/31	10.71.46.142 – 10.71.46.143	10.71.46.143
73	10.71.46.144/31	10.71.46.144 – 10.71.46.145	10.71.46.145
74	10.71.46.146/31	10.71.46.146 – 10.71.46.147	10.71.46.147
75	10.71.46.148/31	10.71.46.148 – 10.71.46.149	10.71.46.149
76	10.71.46.150/31	10.71.46.150 – 10.71.46.151	10.71.46.151
77	10.71.46.152/31	10.71.46.152 – 10.71.46.153	10.71.46.153
78	10.71.46.154/31	10.71.46.154 – 10.71.46.155	10.71.46.155
79	10.71.46.156/31	10.71.46.156 – 10.71.46.157	10.71.46.157
80	10.71.46.158/31	10.71.46.158 – 10.71.46.159	10.71.46.159
81	10.71.46.160/31	10.71.46.160 – 10.71.46.161	10.71.46.161
82	10.71.46.162/31	10.71.46.162 – 10.71.46.163	10.71.46.163
83	10.71.46.164/31	10.71.46.164 – 10.71.46.165	10.71.46.165
84	10.71.46.166/31	10.71.46.166 – 10.71.46.167	10.71.46.167
85	10.71.46.168/31	10.71.46.168 – 10.71.46.169	10.71.46.169
86	10.71.46.170/31	10.71.46.170 – 10.71.46.171	10.71.46.171
87	10.71.46.172/31	10.71.46.172 – 10.71.46.173	10.71.46.173
88	10.71.46.174/31	10.71.46.174 – 10.71.46.175	10.71.46.175
89	10.71.46.176/31	10.71.46.176 – 10.71.46.177	10.71.46.177
90	10.71.46.178/31	10.71.46.178 – 10.71.46.179	10.71.46.179
91	10.71.46.180/31	10.71.46.180 – 10.71.46.181	10.71.46.181
92	10.71.46.182/31	10.71.46.182 – 10.71.46.183	10.71.46.183
93	10.71.46.184/31	10.71.46.184 – 10.71.46.185	10.71.46.185
94	10.71.46.186/31	10.71.46.186 – 10.71.46.187	10.71.46.187
95	10.71.46.188/31	10.71.46.188 – 10.71.46.189	10.71.46.189
96	10.71.46.190/31	10.71.46.190 – 10.71.46.191	10.71.46.191
97	10.71.46.192/31	10.71.46.192 – 10.71.46.193	10.71.46.193
98	10.71.46.194/31	10.71.46.194 – 10.71.46.195	10.71.46.195
99	10.71.46.196/31	10.71.46.196 – 10.71.46.197	10.71.46.197
100	10.71.46.198/31	10.71.46.198 – 10.71.46.199	10.71.46.199
101	10.71.46.200/31	10.71.46.200 – 10.71.46.201	10.71.46.201
102	10.71.46.202/31	10.71.46.202 – 10.71.46.203	10.71.46.203
103	10.71.46.204/31	10.71.46.204 – 10.71.46.205	10.71.46.205
104	10.71.46.206/31	10.71.46.206 – 10.71.46.207	10.71.46.207
105	10.71.46.208/31	10.71.46.208 – 10.71.46.209	10.71.46.209
106	10.71.46.210/31	10.71.46.210 – 10.71.46.211	10.71.46.211
107	10.71.46.212/31	10.71.46.212 – 10.71.46.213	10.71.46.213
108	10.71.46.214/31	10.71.46.214 – 10.71.46.215	10.71.46.215
109	10.71.46.216/31	10.71.46.216 – 10.71.46.217	10.71.46.217
110	10.71.46.218/31	10.71.46.218 – 10.71.46.219	10.71.46.219
111	10.71.46.220/31	10.71.46.220 – 10.71.46.221	10.71.46.221
112	10.71.46.222/31	10.71.46.222 – 10.71.46.223	10.71.46.223
113	10.71.46.224/31	10.71.46.224 – 10.71.46.225	10.71.46.225
114	10.71.46.226/31	10.71.46.226 – 10.71.46.227	10.71.46.227
115	10.71.46.228/31	10.71.46.228 – 10.71.46.229	10.71.46.229
116	10.71.46.230/31	10.71.46.230 – 10.71.46.231	10.71.46.231
117	10.71.46.232/31	10.71.46.232 – 10.71.46.233	10.71.46.233
118	10.71.46.234/31	10.71.46.234 – 10.71.46.235	10.71.46.235
119	10.71.46.236/31	10.71.46.236 – 10.71.46.237	10.71.46.237
120	10.71.46.238/31	10.71.46.238 – 10.71.46.239	10.71.46.239
121	10.71.46.240/31	10.71.46.240 – 10.71.46.241	10.71.46.241
122	10.71.46.242/31	10.71.46.242 – 10.71.46.243	10.71.46.243
123	10.71.46.244/31	10.71.46.244 – 10.71.46.245	10.71.46.245
124	10.71.46.246/31	10.71.46.246 – 10.71.46.247	10.71.46.247
125	10.71.46.248/31	10.71.46.248 – 10.71.46.249	10.71.46.249
126	10.71.46.250/31	10.71.46.250 – 10.71.46.251	10.71.46.251
127	10.71.46.252/31	10.71.46.252 – 10.71.46.253	10.71.46.253
128	10.71.46.254/31	10.71.46.254 – 10.71.46.255	10.71.46.255

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 →