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)10.4.141.0/24

network10.4.141.0/24

broadcast10.4.141.255

first host10.4.141.1

last host10.4.141.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.4.141.0/24

address00001010.00000100.10001101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000100.10001101.00000000

broadcast00001010.00000100.10001101.11111111

green = network part, grey = host part

hex0x0a048d00

decimal168070400

reverse dns0.141.4.10.in-addr.arpa

ipv4-mapped::ffff:a04:8d00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.4.141.0/31	10.4.141.0 – 10.4.141.1	10.4.141.1
2	10.4.141.2/31	10.4.141.2 – 10.4.141.3	10.4.141.3
3	10.4.141.4/31	10.4.141.4 – 10.4.141.5	10.4.141.5
4	10.4.141.6/31	10.4.141.6 – 10.4.141.7	10.4.141.7
5	10.4.141.8/31	10.4.141.8 – 10.4.141.9	10.4.141.9
6	10.4.141.10/31	10.4.141.10 – 10.4.141.11	10.4.141.11
7	10.4.141.12/31	10.4.141.12 – 10.4.141.13	10.4.141.13
8	10.4.141.14/31	10.4.141.14 – 10.4.141.15	10.4.141.15
9	10.4.141.16/31	10.4.141.16 – 10.4.141.17	10.4.141.17
10	10.4.141.18/31	10.4.141.18 – 10.4.141.19	10.4.141.19
11	10.4.141.20/31	10.4.141.20 – 10.4.141.21	10.4.141.21
12	10.4.141.22/31	10.4.141.22 – 10.4.141.23	10.4.141.23
13	10.4.141.24/31	10.4.141.24 – 10.4.141.25	10.4.141.25
14	10.4.141.26/31	10.4.141.26 – 10.4.141.27	10.4.141.27
15	10.4.141.28/31	10.4.141.28 – 10.4.141.29	10.4.141.29
16	10.4.141.30/31	10.4.141.30 – 10.4.141.31	10.4.141.31
17	10.4.141.32/31	10.4.141.32 – 10.4.141.33	10.4.141.33
18	10.4.141.34/31	10.4.141.34 – 10.4.141.35	10.4.141.35
19	10.4.141.36/31	10.4.141.36 – 10.4.141.37	10.4.141.37
20	10.4.141.38/31	10.4.141.38 – 10.4.141.39	10.4.141.39
21	10.4.141.40/31	10.4.141.40 – 10.4.141.41	10.4.141.41
22	10.4.141.42/31	10.4.141.42 – 10.4.141.43	10.4.141.43
23	10.4.141.44/31	10.4.141.44 – 10.4.141.45	10.4.141.45
24	10.4.141.46/31	10.4.141.46 – 10.4.141.47	10.4.141.47
25	10.4.141.48/31	10.4.141.48 – 10.4.141.49	10.4.141.49
26	10.4.141.50/31	10.4.141.50 – 10.4.141.51	10.4.141.51
27	10.4.141.52/31	10.4.141.52 – 10.4.141.53	10.4.141.53
28	10.4.141.54/31	10.4.141.54 – 10.4.141.55	10.4.141.55
29	10.4.141.56/31	10.4.141.56 – 10.4.141.57	10.4.141.57
30	10.4.141.58/31	10.4.141.58 – 10.4.141.59	10.4.141.59
31	10.4.141.60/31	10.4.141.60 – 10.4.141.61	10.4.141.61
32	10.4.141.62/31	10.4.141.62 – 10.4.141.63	10.4.141.63
33	10.4.141.64/31	10.4.141.64 – 10.4.141.65	10.4.141.65
34	10.4.141.66/31	10.4.141.66 – 10.4.141.67	10.4.141.67
35	10.4.141.68/31	10.4.141.68 – 10.4.141.69	10.4.141.69
36	10.4.141.70/31	10.4.141.70 – 10.4.141.71	10.4.141.71
37	10.4.141.72/31	10.4.141.72 – 10.4.141.73	10.4.141.73
38	10.4.141.74/31	10.4.141.74 – 10.4.141.75	10.4.141.75
39	10.4.141.76/31	10.4.141.76 – 10.4.141.77	10.4.141.77
40	10.4.141.78/31	10.4.141.78 – 10.4.141.79	10.4.141.79
41	10.4.141.80/31	10.4.141.80 – 10.4.141.81	10.4.141.81
42	10.4.141.82/31	10.4.141.82 – 10.4.141.83	10.4.141.83
43	10.4.141.84/31	10.4.141.84 – 10.4.141.85	10.4.141.85
44	10.4.141.86/31	10.4.141.86 – 10.4.141.87	10.4.141.87
45	10.4.141.88/31	10.4.141.88 – 10.4.141.89	10.4.141.89
46	10.4.141.90/31	10.4.141.90 – 10.4.141.91	10.4.141.91
47	10.4.141.92/31	10.4.141.92 – 10.4.141.93	10.4.141.93
48	10.4.141.94/31	10.4.141.94 – 10.4.141.95	10.4.141.95
49	10.4.141.96/31	10.4.141.96 – 10.4.141.97	10.4.141.97
50	10.4.141.98/31	10.4.141.98 – 10.4.141.99	10.4.141.99
51	10.4.141.100/31	10.4.141.100 – 10.4.141.101	10.4.141.101
52	10.4.141.102/31	10.4.141.102 – 10.4.141.103	10.4.141.103
53	10.4.141.104/31	10.4.141.104 – 10.4.141.105	10.4.141.105
54	10.4.141.106/31	10.4.141.106 – 10.4.141.107	10.4.141.107
55	10.4.141.108/31	10.4.141.108 – 10.4.141.109	10.4.141.109
56	10.4.141.110/31	10.4.141.110 – 10.4.141.111	10.4.141.111
57	10.4.141.112/31	10.4.141.112 – 10.4.141.113	10.4.141.113
58	10.4.141.114/31	10.4.141.114 – 10.4.141.115	10.4.141.115
59	10.4.141.116/31	10.4.141.116 – 10.4.141.117	10.4.141.117
60	10.4.141.118/31	10.4.141.118 – 10.4.141.119	10.4.141.119
61	10.4.141.120/31	10.4.141.120 – 10.4.141.121	10.4.141.121
62	10.4.141.122/31	10.4.141.122 – 10.4.141.123	10.4.141.123
63	10.4.141.124/31	10.4.141.124 – 10.4.141.125	10.4.141.125
64	10.4.141.126/31	10.4.141.126 – 10.4.141.127	10.4.141.127
65	10.4.141.128/31	10.4.141.128 – 10.4.141.129	10.4.141.129
66	10.4.141.130/31	10.4.141.130 – 10.4.141.131	10.4.141.131
67	10.4.141.132/31	10.4.141.132 – 10.4.141.133	10.4.141.133
68	10.4.141.134/31	10.4.141.134 – 10.4.141.135	10.4.141.135
69	10.4.141.136/31	10.4.141.136 – 10.4.141.137	10.4.141.137
70	10.4.141.138/31	10.4.141.138 – 10.4.141.139	10.4.141.139
71	10.4.141.140/31	10.4.141.140 – 10.4.141.141	10.4.141.141
72	10.4.141.142/31	10.4.141.142 – 10.4.141.143	10.4.141.143
73	10.4.141.144/31	10.4.141.144 – 10.4.141.145	10.4.141.145
74	10.4.141.146/31	10.4.141.146 – 10.4.141.147	10.4.141.147
75	10.4.141.148/31	10.4.141.148 – 10.4.141.149	10.4.141.149
76	10.4.141.150/31	10.4.141.150 – 10.4.141.151	10.4.141.151
77	10.4.141.152/31	10.4.141.152 – 10.4.141.153	10.4.141.153
78	10.4.141.154/31	10.4.141.154 – 10.4.141.155	10.4.141.155
79	10.4.141.156/31	10.4.141.156 – 10.4.141.157	10.4.141.157
80	10.4.141.158/31	10.4.141.158 – 10.4.141.159	10.4.141.159
81	10.4.141.160/31	10.4.141.160 – 10.4.141.161	10.4.141.161
82	10.4.141.162/31	10.4.141.162 – 10.4.141.163	10.4.141.163
83	10.4.141.164/31	10.4.141.164 – 10.4.141.165	10.4.141.165
84	10.4.141.166/31	10.4.141.166 – 10.4.141.167	10.4.141.167
85	10.4.141.168/31	10.4.141.168 – 10.4.141.169	10.4.141.169
86	10.4.141.170/31	10.4.141.170 – 10.4.141.171	10.4.141.171
87	10.4.141.172/31	10.4.141.172 – 10.4.141.173	10.4.141.173
88	10.4.141.174/31	10.4.141.174 – 10.4.141.175	10.4.141.175
89	10.4.141.176/31	10.4.141.176 – 10.4.141.177	10.4.141.177
90	10.4.141.178/31	10.4.141.178 – 10.4.141.179	10.4.141.179
91	10.4.141.180/31	10.4.141.180 – 10.4.141.181	10.4.141.181
92	10.4.141.182/31	10.4.141.182 – 10.4.141.183	10.4.141.183
93	10.4.141.184/31	10.4.141.184 – 10.4.141.185	10.4.141.185
94	10.4.141.186/31	10.4.141.186 – 10.4.141.187	10.4.141.187
95	10.4.141.188/31	10.4.141.188 – 10.4.141.189	10.4.141.189
96	10.4.141.190/31	10.4.141.190 – 10.4.141.191	10.4.141.191
97	10.4.141.192/31	10.4.141.192 – 10.4.141.193	10.4.141.193
98	10.4.141.194/31	10.4.141.194 – 10.4.141.195	10.4.141.195
99	10.4.141.196/31	10.4.141.196 – 10.4.141.197	10.4.141.197
100	10.4.141.198/31	10.4.141.198 – 10.4.141.199	10.4.141.199
101	10.4.141.200/31	10.4.141.200 – 10.4.141.201	10.4.141.201
102	10.4.141.202/31	10.4.141.202 – 10.4.141.203	10.4.141.203
103	10.4.141.204/31	10.4.141.204 – 10.4.141.205	10.4.141.205
104	10.4.141.206/31	10.4.141.206 – 10.4.141.207	10.4.141.207
105	10.4.141.208/31	10.4.141.208 – 10.4.141.209	10.4.141.209
106	10.4.141.210/31	10.4.141.210 – 10.4.141.211	10.4.141.211
107	10.4.141.212/31	10.4.141.212 – 10.4.141.213	10.4.141.213
108	10.4.141.214/31	10.4.141.214 – 10.4.141.215	10.4.141.215
109	10.4.141.216/31	10.4.141.216 – 10.4.141.217	10.4.141.217
110	10.4.141.218/31	10.4.141.218 – 10.4.141.219	10.4.141.219
111	10.4.141.220/31	10.4.141.220 – 10.4.141.221	10.4.141.221
112	10.4.141.222/31	10.4.141.222 – 10.4.141.223	10.4.141.223
113	10.4.141.224/31	10.4.141.224 – 10.4.141.225	10.4.141.225
114	10.4.141.226/31	10.4.141.226 – 10.4.141.227	10.4.141.227
115	10.4.141.228/31	10.4.141.228 – 10.4.141.229	10.4.141.229
116	10.4.141.230/31	10.4.141.230 – 10.4.141.231	10.4.141.231
117	10.4.141.232/31	10.4.141.232 – 10.4.141.233	10.4.141.233
118	10.4.141.234/31	10.4.141.234 – 10.4.141.235	10.4.141.235
119	10.4.141.236/31	10.4.141.236 – 10.4.141.237	10.4.141.237
120	10.4.141.238/31	10.4.141.238 – 10.4.141.239	10.4.141.239
121	10.4.141.240/31	10.4.141.240 – 10.4.141.241	10.4.141.241
122	10.4.141.242/31	10.4.141.242 – 10.4.141.243	10.4.141.243
123	10.4.141.244/31	10.4.141.244 – 10.4.141.245	10.4.141.245
124	10.4.141.246/31	10.4.141.246 – 10.4.141.247	10.4.141.247
125	10.4.141.248/31	10.4.141.248 – 10.4.141.249	10.4.141.249
126	10.4.141.250/31	10.4.141.250 – 10.4.141.251	10.4.141.251
127	10.4.141.252/31	10.4.141.252 – 10.4.141.253	10.4.141.253
128	10.4.141.254/31	10.4.141.254 – 10.4.141.255	10.4.141.255

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 →