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)10.2.58.0/24

network10.2.58.0/24

broadcast10.2.58.255

first host10.2.58.1

last host10.2.58.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.58.0/24

address00001010.00000010.00111010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.00111010.00000000

broadcast00001010.00000010.00111010.11111111

green = network part, grey = host part

hex0x0a023a00

decimal167918080

reverse dns0.58.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:3a00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.58.0/31	10.2.58.0 – 10.2.58.1	10.2.58.1
2	10.2.58.2/31	10.2.58.2 – 10.2.58.3	10.2.58.3
3	10.2.58.4/31	10.2.58.4 – 10.2.58.5	10.2.58.5
4	10.2.58.6/31	10.2.58.6 – 10.2.58.7	10.2.58.7
5	10.2.58.8/31	10.2.58.8 – 10.2.58.9	10.2.58.9
6	10.2.58.10/31	10.2.58.10 – 10.2.58.11	10.2.58.11
7	10.2.58.12/31	10.2.58.12 – 10.2.58.13	10.2.58.13
8	10.2.58.14/31	10.2.58.14 – 10.2.58.15	10.2.58.15
9	10.2.58.16/31	10.2.58.16 – 10.2.58.17	10.2.58.17
10	10.2.58.18/31	10.2.58.18 – 10.2.58.19	10.2.58.19
11	10.2.58.20/31	10.2.58.20 – 10.2.58.21	10.2.58.21
12	10.2.58.22/31	10.2.58.22 – 10.2.58.23	10.2.58.23
13	10.2.58.24/31	10.2.58.24 – 10.2.58.25	10.2.58.25
14	10.2.58.26/31	10.2.58.26 – 10.2.58.27	10.2.58.27
15	10.2.58.28/31	10.2.58.28 – 10.2.58.29	10.2.58.29
16	10.2.58.30/31	10.2.58.30 – 10.2.58.31	10.2.58.31
17	10.2.58.32/31	10.2.58.32 – 10.2.58.33	10.2.58.33
18	10.2.58.34/31	10.2.58.34 – 10.2.58.35	10.2.58.35
19	10.2.58.36/31	10.2.58.36 – 10.2.58.37	10.2.58.37
20	10.2.58.38/31	10.2.58.38 – 10.2.58.39	10.2.58.39
21	10.2.58.40/31	10.2.58.40 – 10.2.58.41	10.2.58.41
22	10.2.58.42/31	10.2.58.42 – 10.2.58.43	10.2.58.43
23	10.2.58.44/31	10.2.58.44 – 10.2.58.45	10.2.58.45
24	10.2.58.46/31	10.2.58.46 – 10.2.58.47	10.2.58.47
25	10.2.58.48/31	10.2.58.48 – 10.2.58.49	10.2.58.49
26	10.2.58.50/31	10.2.58.50 – 10.2.58.51	10.2.58.51
27	10.2.58.52/31	10.2.58.52 – 10.2.58.53	10.2.58.53
28	10.2.58.54/31	10.2.58.54 – 10.2.58.55	10.2.58.55
29	10.2.58.56/31	10.2.58.56 – 10.2.58.57	10.2.58.57
30	10.2.58.58/31	10.2.58.58 – 10.2.58.59	10.2.58.59
31	10.2.58.60/31	10.2.58.60 – 10.2.58.61	10.2.58.61
32	10.2.58.62/31	10.2.58.62 – 10.2.58.63	10.2.58.63
33	10.2.58.64/31	10.2.58.64 – 10.2.58.65	10.2.58.65
34	10.2.58.66/31	10.2.58.66 – 10.2.58.67	10.2.58.67
35	10.2.58.68/31	10.2.58.68 – 10.2.58.69	10.2.58.69
36	10.2.58.70/31	10.2.58.70 – 10.2.58.71	10.2.58.71
37	10.2.58.72/31	10.2.58.72 – 10.2.58.73	10.2.58.73
38	10.2.58.74/31	10.2.58.74 – 10.2.58.75	10.2.58.75
39	10.2.58.76/31	10.2.58.76 – 10.2.58.77	10.2.58.77
40	10.2.58.78/31	10.2.58.78 – 10.2.58.79	10.2.58.79
41	10.2.58.80/31	10.2.58.80 – 10.2.58.81	10.2.58.81
42	10.2.58.82/31	10.2.58.82 – 10.2.58.83	10.2.58.83
43	10.2.58.84/31	10.2.58.84 – 10.2.58.85	10.2.58.85
44	10.2.58.86/31	10.2.58.86 – 10.2.58.87	10.2.58.87
45	10.2.58.88/31	10.2.58.88 – 10.2.58.89	10.2.58.89
46	10.2.58.90/31	10.2.58.90 – 10.2.58.91	10.2.58.91
47	10.2.58.92/31	10.2.58.92 – 10.2.58.93	10.2.58.93
48	10.2.58.94/31	10.2.58.94 – 10.2.58.95	10.2.58.95
49	10.2.58.96/31	10.2.58.96 – 10.2.58.97	10.2.58.97
50	10.2.58.98/31	10.2.58.98 – 10.2.58.99	10.2.58.99
51	10.2.58.100/31	10.2.58.100 – 10.2.58.101	10.2.58.101
52	10.2.58.102/31	10.2.58.102 – 10.2.58.103	10.2.58.103
53	10.2.58.104/31	10.2.58.104 – 10.2.58.105	10.2.58.105
54	10.2.58.106/31	10.2.58.106 – 10.2.58.107	10.2.58.107
55	10.2.58.108/31	10.2.58.108 – 10.2.58.109	10.2.58.109
56	10.2.58.110/31	10.2.58.110 – 10.2.58.111	10.2.58.111
57	10.2.58.112/31	10.2.58.112 – 10.2.58.113	10.2.58.113
58	10.2.58.114/31	10.2.58.114 – 10.2.58.115	10.2.58.115
59	10.2.58.116/31	10.2.58.116 – 10.2.58.117	10.2.58.117
60	10.2.58.118/31	10.2.58.118 – 10.2.58.119	10.2.58.119
61	10.2.58.120/31	10.2.58.120 – 10.2.58.121	10.2.58.121
62	10.2.58.122/31	10.2.58.122 – 10.2.58.123	10.2.58.123
63	10.2.58.124/31	10.2.58.124 – 10.2.58.125	10.2.58.125
64	10.2.58.126/31	10.2.58.126 – 10.2.58.127	10.2.58.127
65	10.2.58.128/31	10.2.58.128 – 10.2.58.129	10.2.58.129
66	10.2.58.130/31	10.2.58.130 – 10.2.58.131	10.2.58.131
67	10.2.58.132/31	10.2.58.132 – 10.2.58.133	10.2.58.133
68	10.2.58.134/31	10.2.58.134 – 10.2.58.135	10.2.58.135
69	10.2.58.136/31	10.2.58.136 – 10.2.58.137	10.2.58.137
70	10.2.58.138/31	10.2.58.138 – 10.2.58.139	10.2.58.139
71	10.2.58.140/31	10.2.58.140 – 10.2.58.141	10.2.58.141
72	10.2.58.142/31	10.2.58.142 – 10.2.58.143	10.2.58.143
73	10.2.58.144/31	10.2.58.144 – 10.2.58.145	10.2.58.145
74	10.2.58.146/31	10.2.58.146 – 10.2.58.147	10.2.58.147
75	10.2.58.148/31	10.2.58.148 – 10.2.58.149	10.2.58.149
76	10.2.58.150/31	10.2.58.150 – 10.2.58.151	10.2.58.151
77	10.2.58.152/31	10.2.58.152 – 10.2.58.153	10.2.58.153
78	10.2.58.154/31	10.2.58.154 – 10.2.58.155	10.2.58.155
79	10.2.58.156/31	10.2.58.156 – 10.2.58.157	10.2.58.157
80	10.2.58.158/31	10.2.58.158 – 10.2.58.159	10.2.58.159
81	10.2.58.160/31	10.2.58.160 – 10.2.58.161	10.2.58.161
82	10.2.58.162/31	10.2.58.162 – 10.2.58.163	10.2.58.163
83	10.2.58.164/31	10.2.58.164 – 10.2.58.165	10.2.58.165
84	10.2.58.166/31	10.2.58.166 – 10.2.58.167	10.2.58.167
85	10.2.58.168/31	10.2.58.168 – 10.2.58.169	10.2.58.169
86	10.2.58.170/31	10.2.58.170 – 10.2.58.171	10.2.58.171
87	10.2.58.172/31	10.2.58.172 – 10.2.58.173	10.2.58.173
88	10.2.58.174/31	10.2.58.174 – 10.2.58.175	10.2.58.175
89	10.2.58.176/31	10.2.58.176 – 10.2.58.177	10.2.58.177
90	10.2.58.178/31	10.2.58.178 – 10.2.58.179	10.2.58.179
91	10.2.58.180/31	10.2.58.180 – 10.2.58.181	10.2.58.181
92	10.2.58.182/31	10.2.58.182 – 10.2.58.183	10.2.58.183
93	10.2.58.184/31	10.2.58.184 – 10.2.58.185	10.2.58.185
94	10.2.58.186/31	10.2.58.186 – 10.2.58.187	10.2.58.187
95	10.2.58.188/31	10.2.58.188 – 10.2.58.189	10.2.58.189
96	10.2.58.190/31	10.2.58.190 – 10.2.58.191	10.2.58.191
97	10.2.58.192/31	10.2.58.192 – 10.2.58.193	10.2.58.193
98	10.2.58.194/31	10.2.58.194 – 10.2.58.195	10.2.58.195
99	10.2.58.196/31	10.2.58.196 – 10.2.58.197	10.2.58.197
100	10.2.58.198/31	10.2.58.198 – 10.2.58.199	10.2.58.199
101	10.2.58.200/31	10.2.58.200 – 10.2.58.201	10.2.58.201
102	10.2.58.202/31	10.2.58.202 – 10.2.58.203	10.2.58.203
103	10.2.58.204/31	10.2.58.204 – 10.2.58.205	10.2.58.205
104	10.2.58.206/31	10.2.58.206 – 10.2.58.207	10.2.58.207
105	10.2.58.208/31	10.2.58.208 – 10.2.58.209	10.2.58.209
106	10.2.58.210/31	10.2.58.210 – 10.2.58.211	10.2.58.211
107	10.2.58.212/31	10.2.58.212 – 10.2.58.213	10.2.58.213
108	10.2.58.214/31	10.2.58.214 – 10.2.58.215	10.2.58.215
109	10.2.58.216/31	10.2.58.216 – 10.2.58.217	10.2.58.217
110	10.2.58.218/31	10.2.58.218 – 10.2.58.219	10.2.58.219
111	10.2.58.220/31	10.2.58.220 – 10.2.58.221	10.2.58.221
112	10.2.58.222/31	10.2.58.222 – 10.2.58.223	10.2.58.223
113	10.2.58.224/31	10.2.58.224 – 10.2.58.225	10.2.58.225
114	10.2.58.226/31	10.2.58.226 – 10.2.58.227	10.2.58.227
115	10.2.58.228/31	10.2.58.228 – 10.2.58.229	10.2.58.229
116	10.2.58.230/31	10.2.58.230 – 10.2.58.231	10.2.58.231
117	10.2.58.232/31	10.2.58.232 – 10.2.58.233	10.2.58.233
118	10.2.58.234/31	10.2.58.234 – 10.2.58.235	10.2.58.235
119	10.2.58.236/31	10.2.58.236 – 10.2.58.237	10.2.58.237
120	10.2.58.238/31	10.2.58.238 – 10.2.58.239	10.2.58.239
121	10.2.58.240/31	10.2.58.240 – 10.2.58.241	10.2.58.241
122	10.2.58.242/31	10.2.58.242 – 10.2.58.243	10.2.58.243
123	10.2.58.244/31	10.2.58.244 – 10.2.58.245	10.2.58.245
124	10.2.58.246/31	10.2.58.246 – 10.2.58.247	10.2.58.247
125	10.2.58.248/31	10.2.58.248 – 10.2.58.249	10.2.58.249
126	10.2.58.250/31	10.2.58.250 – 10.2.58.251	10.2.58.251
127	10.2.58.252/31	10.2.58.252 – 10.2.58.253	10.2.58.253
128	10.2.58.254/31	10.2.58.254 – 10.2.58.255	10.2.58.255

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 →