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)10.3.41.0/24

network10.3.41.0/24

broadcast10.3.41.255

first host10.3.41.1

last host10.3.41.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.3.41.0/24

address00001010.00000011.00101001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000011.00101001.00000000

broadcast00001010.00000011.00101001.11111111

green = network part, grey = host part

hex0x0a032900

decimal167979264

reverse dns0.41.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:2900

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.41.0/31	10.3.41.0 – 10.3.41.1	10.3.41.1
2	10.3.41.2/31	10.3.41.2 – 10.3.41.3	10.3.41.3
3	10.3.41.4/31	10.3.41.4 – 10.3.41.5	10.3.41.5
4	10.3.41.6/31	10.3.41.6 – 10.3.41.7	10.3.41.7
5	10.3.41.8/31	10.3.41.8 – 10.3.41.9	10.3.41.9
6	10.3.41.10/31	10.3.41.10 – 10.3.41.11	10.3.41.11
7	10.3.41.12/31	10.3.41.12 – 10.3.41.13	10.3.41.13
8	10.3.41.14/31	10.3.41.14 – 10.3.41.15	10.3.41.15
9	10.3.41.16/31	10.3.41.16 – 10.3.41.17	10.3.41.17
10	10.3.41.18/31	10.3.41.18 – 10.3.41.19	10.3.41.19
11	10.3.41.20/31	10.3.41.20 – 10.3.41.21	10.3.41.21
12	10.3.41.22/31	10.3.41.22 – 10.3.41.23	10.3.41.23
13	10.3.41.24/31	10.3.41.24 – 10.3.41.25	10.3.41.25
14	10.3.41.26/31	10.3.41.26 – 10.3.41.27	10.3.41.27
15	10.3.41.28/31	10.3.41.28 – 10.3.41.29	10.3.41.29
16	10.3.41.30/31	10.3.41.30 – 10.3.41.31	10.3.41.31
17	10.3.41.32/31	10.3.41.32 – 10.3.41.33	10.3.41.33
18	10.3.41.34/31	10.3.41.34 – 10.3.41.35	10.3.41.35
19	10.3.41.36/31	10.3.41.36 – 10.3.41.37	10.3.41.37
20	10.3.41.38/31	10.3.41.38 – 10.3.41.39	10.3.41.39
21	10.3.41.40/31	10.3.41.40 – 10.3.41.41	10.3.41.41
22	10.3.41.42/31	10.3.41.42 – 10.3.41.43	10.3.41.43
23	10.3.41.44/31	10.3.41.44 – 10.3.41.45	10.3.41.45
24	10.3.41.46/31	10.3.41.46 – 10.3.41.47	10.3.41.47
25	10.3.41.48/31	10.3.41.48 – 10.3.41.49	10.3.41.49
26	10.3.41.50/31	10.3.41.50 – 10.3.41.51	10.3.41.51
27	10.3.41.52/31	10.3.41.52 – 10.3.41.53	10.3.41.53
28	10.3.41.54/31	10.3.41.54 – 10.3.41.55	10.3.41.55
29	10.3.41.56/31	10.3.41.56 – 10.3.41.57	10.3.41.57
30	10.3.41.58/31	10.3.41.58 – 10.3.41.59	10.3.41.59
31	10.3.41.60/31	10.3.41.60 – 10.3.41.61	10.3.41.61
32	10.3.41.62/31	10.3.41.62 – 10.3.41.63	10.3.41.63
33	10.3.41.64/31	10.3.41.64 – 10.3.41.65	10.3.41.65
34	10.3.41.66/31	10.3.41.66 – 10.3.41.67	10.3.41.67
35	10.3.41.68/31	10.3.41.68 – 10.3.41.69	10.3.41.69
36	10.3.41.70/31	10.3.41.70 – 10.3.41.71	10.3.41.71
37	10.3.41.72/31	10.3.41.72 – 10.3.41.73	10.3.41.73
38	10.3.41.74/31	10.3.41.74 – 10.3.41.75	10.3.41.75
39	10.3.41.76/31	10.3.41.76 – 10.3.41.77	10.3.41.77
40	10.3.41.78/31	10.3.41.78 – 10.3.41.79	10.3.41.79
41	10.3.41.80/31	10.3.41.80 – 10.3.41.81	10.3.41.81
42	10.3.41.82/31	10.3.41.82 – 10.3.41.83	10.3.41.83
43	10.3.41.84/31	10.3.41.84 – 10.3.41.85	10.3.41.85
44	10.3.41.86/31	10.3.41.86 – 10.3.41.87	10.3.41.87
45	10.3.41.88/31	10.3.41.88 – 10.3.41.89	10.3.41.89
46	10.3.41.90/31	10.3.41.90 – 10.3.41.91	10.3.41.91
47	10.3.41.92/31	10.3.41.92 – 10.3.41.93	10.3.41.93
48	10.3.41.94/31	10.3.41.94 – 10.3.41.95	10.3.41.95
49	10.3.41.96/31	10.3.41.96 – 10.3.41.97	10.3.41.97
50	10.3.41.98/31	10.3.41.98 – 10.3.41.99	10.3.41.99
51	10.3.41.100/31	10.3.41.100 – 10.3.41.101	10.3.41.101
52	10.3.41.102/31	10.3.41.102 – 10.3.41.103	10.3.41.103
53	10.3.41.104/31	10.3.41.104 – 10.3.41.105	10.3.41.105
54	10.3.41.106/31	10.3.41.106 – 10.3.41.107	10.3.41.107
55	10.3.41.108/31	10.3.41.108 – 10.3.41.109	10.3.41.109
56	10.3.41.110/31	10.3.41.110 – 10.3.41.111	10.3.41.111
57	10.3.41.112/31	10.3.41.112 – 10.3.41.113	10.3.41.113
58	10.3.41.114/31	10.3.41.114 – 10.3.41.115	10.3.41.115
59	10.3.41.116/31	10.3.41.116 – 10.3.41.117	10.3.41.117
60	10.3.41.118/31	10.3.41.118 – 10.3.41.119	10.3.41.119
61	10.3.41.120/31	10.3.41.120 – 10.3.41.121	10.3.41.121
62	10.3.41.122/31	10.3.41.122 – 10.3.41.123	10.3.41.123
63	10.3.41.124/31	10.3.41.124 – 10.3.41.125	10.3.41.125
64	10.3.41.126/31	10.3.41.126 – 10.3.41.127	10.3.41.127
65	10.3.41.128/31	10.3.41.128 – 10.3.41.129	10.3.41.129
66	10.3.41.130/31	10.3.41.130 – 10.3.41.131	10.3.41.131
67	10.3.41.132/31	10.3.41.132 – 10.3.41.133	10.3.41.133
68	10.3.41.134/31	10.3.41.134 – 10.3.41.135	10.3.41.135
69	10.3.41.136/31	10.3.41.136 – 10.3.41.137	10.3.41.137
70	10.3.41.138/31	10.3.41.138 – 10.3.41.139	10.3.41.139
71	10.3.41.140/31	10.3.41.140 – 10.3.41.141	10.3.41.141
72	10.3.41.142/31	10.3.41.142 – 10.3.41.143	10.3.41.143
73	10.3.41.144/31	10.3.41.144 – 10.3.41.145	10.3.41.145
74	10.3.41.146/31	10.3.41.146 – 10.3.41.147	10.3.41.147
75	10.3.41.148/31	10.3.41.148 – 10.3.41.149	10.3.41.149
76	10.3.41.150/31	10.3.41.150 – 10.3.41.151	10.3.41.151
77	10.3.41.152/31	10.3.41.152 – 10.3.41.153	10.3.41.153
78	10.3.41.154/31	10.3.41.154 – 10.3.41.155	10.3.41.155
79	10.3.41.156/31	10.3.41.156 – 10.3.41.157	10.3.41.157
80	10.3.41.158/31	10.3.41.158 – 10.3.41.159	10.3.41.159
81	10.3.41.160/31	10.3.41.160 – 10.3.41.161	10.3.41.161
82	10.3.41.162/31	10.3.41.162 – 10.3.41.163	10.3.41.163
83	10.3.41.164/31	10.3.41.164 – 10.3.41.165	10.3.41.165
84	10.3.41.166/31	10.3.41.166 – 10.3.41.167	10.3.41.167
85	10.3.41.168/31	10.3.41.168 – 10.3.41.169	10.3.41.169
86	10.3.41.170/31	10.3.41.170 – 10.3.41.171	10.3.41.171
87	10.3.41.172/31	10.3.41.172 – 10.3.41.173	10.3.41.173
88	10.3.41.174/31	10.3.41.174 – 10.3.41.175	10.3.41.175
89	10.3.41.176/31	10.3.41.176 – 10.3.41.177	10.3.41.177
90	10.3.41.178/31	10.3.41.178 – 10.3.41.179	10.3.41.179
91	10.3.41.180/31	10.3.41.180 – 10.3.41.181	10.3.41.181
92	10.3.41.182/31	10.3.41.182 – 10.3.41.183	10.3.41.183
93	10.3.41.184/31	10.3.41.184 – 10.3.41.185	10.3.41.185
94	10.3.41.186/31	10.3.41.186 – 10.3.41.187	10.3.41.187
95	10.3.41.188/31	10.3.41.188 – 10.3.41.189	10.3.41.189
96	10.3.41.190/31	10.3.41.190 – 10.3.41.191	10.3.41.191
97	10.3.41.192/31	10.3.41.192 – 10.3.41.193	10.3.41.193
98	10.3.41.194/31	10.3.41.194 – 10.3.41.195	10.3.41.195
99	10.3.41.196/31	10.3.41.196 – 10.3.41.197	10.3.41.197
100	10.3.41.198/31	10.3.41.198 – 10.3.41.199	10.3.41.199
101	10.3.41.200/31	10.3.41.200 – 10.3.41.201	10.3.41.201
102	10.3.41.202/31	10.3.41.202 – 10.3.41.203	10.3.41.203
103	10.3.41.204/31	10.3.41.204 – 10.3.41.205	10.3.41.205
104	10.3.41.206/31	10.3.41.206 – 10.3.41.207	10.3.41.207
105	10.3.41.208/31	10.3.41.208 – 10.3.41.209	10.3.41.209
106	10.3.41.210/31	10.3.41.210 – 10.3.41.211	10.3.41.211
107	10.3.41.212/31	10.3.41.212 – 10.3.41.213	10.3.41.213
108	10.3.41.214/31	10.3.41.214 – 10.3.41.215	10.3.41.215
109	10.3.41.216/31	10.3.41.216 – 10.3.41.217	10.3.41.217
110	10.3.41.218/31	10.3.41.218 – 10.3.41.219	10.3.41.219
111	10.3.41.220/31	10.3.41.220 – 10.3.41.221	10.3.41.221
112	10.3.41.222/31	10.3.41.222 – 10.3.41.223	10.3.41.223
113	10.3.41.224/31	10.3.41.224 – 10.3.41.225	10.3.41.225
114	10.3.41.226/31	10.3.41.226 – 10.3.41.227	10.3.41.227
115	10.3.41.228/31	10.3.41.228 – 10.3.41.229	10.3.41.229
116	10.3.41.230/31	10.3.41.230 – 10.3.41.231	10.3.41.231
117	10.3.41.232/31	10.3.41.232 – 10.3.41.233	10.3.41.233
118	10.3.41.234/31	10.3.41.234 – 10.3.41.235	10.3.41.235
119	10.3.41.236/31	10.3.41.236 – 10.3.41.237	10.3.41.237
120	10.3.41.238/31	10.3.41.238 – 10.3.41.239	10.3.41.239
121	10.3.41.240/31	10.3.41.240 – 10.3.41.241	10.3.41.241
122	10.3.41.242/31	10.3.41.242 – 10.3.41.243	10.3.41.243
123	10.3.41.244/31	10.3.41.244 – 10.3.41.245	10.3.41.245
124	10.3.41.246/31	10.3.41.246 – 10.3.41.247	10.3.41.247
125	10.3.41.248/31	10.3.41.248 – 10.3.41.249	10.3.41.249
126	10.3.41.250/31	10.3.41.250 – 10.3.41.251	10.3.41.251
127	10.3.41.252/31	10.3.41.252 – 10.3.41.253	10.3.41.253
128	10.3.41.254/31	10.3.41.254 – 10.3.41.255	10.3.41.255

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 →