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)10.4.74.0/24

network10.4.74.0/24

broadcast10.4.74.255

first host10.4.74.1

last host10.4.74.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.4.74.0/24

address00001010.00000100.01001010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000100.01001010.00000000

broadcast00001010.00000100.01001010.11111111

green = network part, grey = host part

hex0x0a044a00

decimal168053248

reverse dns0.74.4.10.in-addr.arpa

ipv4-mapped::ffff:a04:4a00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.4.74.0/31	10.4.74.0 – 10.4.74.1	10.4.74.1
2	10.4.74.2/31	10.4.74.2 – 10.4.74.3	10.4.74.3
3	10.4.74.4/31	10.4.74.4 – 10.4.74.5	10.4.74.5
4	10.4.74.6/31	10.4.74.6 – 10.4.74.7	10.4.74.7
5	10.4.74.8/31	10.4.74.8 – 10.4.74.9	10.4.74.9
6	10.4.74.10/31	10.4.74.10 – 10.4.74.11	10.4.74.11
7	10.4.74.12/31	10.4.74.12 – 10.4.74.13	10.4.74.13
8	10.4.74.14/31	10.4.74.14 – 10.4.74.15	10.4.74.15
9	10.4.74.16/31	10.4.74.16 – 10.4.74.17	10.4.74.17
10	10.4.74.18/31	10.4.74.18 – 10.4.74.19	10.4.74.19
11	10.4.74.20/31	10.4.74.20 – 10.4.74.21	10.4.74.21
12	10.4.74.22/31	10.4.74.22 – 10.4.74.23	10.4.74.23
13	10.4.74.24/31	10.4.74.24 – 10.4.74.25	10.4.74.25
14	10.4.74.26/31	10.4.74.26 – 10.4.74.27	10.4.74.27
15	10.4.74.28/31	10.4.74.28 – 10.4.74.29	10.4.74.29
16	10.4.74.30/31	10.4.74.30 – 10.4.74.31	10.4.74.31
17	10.4.74.32/31	10.4.74.32 – 10.4.74.33	10.4.74.33
18	10.4.74.34/31	10.4.74.34 – 10.4.74.35	10.4.74.35
19	10.4.74.36/31	10.4.74.36 – 10.4.74.37	10.4.74.37
20	10.4.74.38/31	10.4.74.38 – 10.4.74.39	10.4.74.39
21	10.4.74.40/31	10.4.74.40 – 10.4.74.41	10.4.74.41
22	10.4.74.42/31	10.4.74.42 – 10.4.74.43	10.4.74.43
23	10.4.74.44/31	10.4.74.44 – 10.4.74.45	10.4.74.45
24	10.4.74.46/31	10.4.74.46 – 10.4.74.47	10.4.74.47
25	10.4.74.48/31	10.4.74.48 – 10.4.74.49	10.4.74.49
26	10.4.74.50/31	10.4.74.50 – 10.4.74.51	10.4.74.51
27	10.4.74.52/31	10.4.74.52 – 10.4.74.53	10.4.74.53
28	10.4.74.54/31	10.4.74.54 – 10.4.74.55	10.4.74.55
29	10.4.74.56/31	10.4.74.56 – 10.4.74.57	10.4.74.57
30	10.4.74.58/31	10.4.74.58 – 10.4.74.59	10.4.74.59
31	10.4.74.60/31	10.4.74.60 – 10.4.74.61	10.4.74.61
32	10.4.74.62/31	10.4.74.62 – 10.4.74.63	10.4.74.63
33	10.4.74.64/31	10.4.74.64 – 10.4.74.65	10.4.74.65
34	10.4.74.66/31	10.4.74.66 – 10.4.74.67	10.4.74.67
35	10.4.74.68/31	10.4.74.68 – 10.4.74.69	10.4.74.69
36	10.4.74.70/31	10.4.74.70 – 10.4.74.71	10.4.74.71
37	10.4.74.72/31	10.4.74.72 – 10.4.74.73	10.4.74.73
38	10.4.74.74/31	10.4.74.74 – 10.4.74.75	10.4.74.75
39	10.4.74.76/31	10.4.74.76 – 10.4.74.77	10.4.74.77
40	10.4.74.78/31	10.4.74.78 – 10.4.74.79	10.4.74.79
41	10.4.74.80/31	10.4.74.80 – 10.4.74.81	10.4.74.81
42	10.4.74.82/31	10.4.74.82 – 10.4.74.83	10.4.74.83
43	10.4.74.84/31	10.4.74.84 – 10.4.74.85	10.4.74.85
44	10.4.74.86/31	10.4.74.86 – 10.4.74.87	10.4.74.87
45	10.4.74.88/31	10.4.74.88 – 10.4.74.89	10.4.74.89
46	10.4.74.90/31	10.4.74.90 – 10.4.74.91	10.4.74.91
47	10.4.74.92/31	10.4.74.92 – 10.4.74.93	10.4.74.93
48	10.4.74.94/31	10.4.74.94 – 10.4.74.95	10.4.74.95
49	10.4.74.96/31	10.4.74.96 – 10.4.74.97	10.4.74.97
50	10.4.74.98/31	10.4.74.98 – 10.4.74.99	10.4.74.99
51	10.4.74.100/31	10.4.74.100 – 10.4.74.101	10.4.74.101
52	10.4.74.102/31	10.4.74.102 – 10.4.74.103	10.4.74.103
53	10.4.74.104/31	10.4.74.104 – 10.4.74.105	10.4.74.105
54	10.4.74.106/31	10.4.74.106 – 10.4.74.107	10.4.74.107
55	10.4.74.108/31	10.4.74.108 – 10.4.74.109	10.4.74.109
56	10.4.74.110/31	10.4.74.110 – 10.4.74.111	10.4.74.111
57	10.4.74.112/31	10.4.74.112 – 10.4.74.113	10.4.74.113
58	10.4.74.114/31	10.4.74.114 – 10.4.74.115	10.4.74.115
59	10.4.74.116/31	10.4.74.116 – 10.4.74.117	10.4.74.117
60	10.4.74.118/31	10.4.74.118 – 10.4.74.119	10.4.74.119
61	10.4.74.120/31	10.4.74.120 – 10.4.74.121	10.4.74.121
62	10.4.74.122/31	10.4.74.122 – 10.4.74.123	10.4.74.123
63	10.4.74.124/31	10.4.74.124 – 10.4.74.125	10.4.74.125
64	10.4.74.126/31	10.4.74.126 – 10.4.74.127	10.4.74.127
65	10.4.74.128/31	10.4.74.128 – 10.4.74.129	10.4.74.129
66	10.4.74.130/31	10.4.74.130 – 10.4.74.131	10.4.74.131
67	10.4.74.132/31	10.4.74.132 – 10.4.74.133	10.4.74.133
68	10.4.74.134/31	10.4.74.134 – 10.4.74.135	10.4.74.135
69	10.4.74.136/31	10.4.74.136 – 10.4.74.137	10.4.74.137
70	10.4.74.138/31	10.4.74.138 – 10.4.74.139	10.4.74.139
71	10.4.74.140/31	10.4.74.140 – 10.4.74.141	10.4.74.141
72	10.4.74.142/31	10.4.74.142 – 10.4.74.143	10.4.74.143
73	10.4.74.144/31	10.4.74.144 – 10.4.74.145	10.4.74.145
74	10.4.74.146/31	10.4.74.146 – 10.4.74.147	10.4.74.147
75	10.4.74.148/31	10.4.74.148 – 10.4.74.149	10.4.74.149
76	10.4.74.150/31	10.4.74.150 – 10.4.74.151	10.4.74.151
77	10.4.74.152/31	10.4.74.152 – 10.4.74.153	10.4.74.153
78	10.4.74.154/31	10.4.74.154 – 10.4.74.155	10.4.74.155
79	10.4.74.156/31	10.4.74.156 – 10.4.74.157	10.4.74.157
80	10.4.74.158/31	10.4.74.158 – 10.4.74.159	10.4.74.159
81	10.4.74.160/31	10.4.74.160 – 10.4.74.161	10.4.74.161
82	10.4.74.162/31	10.4.74.162 – 10.4.74.163	10.4.74.163
83	10.4.74.164/31	10.4.74.164 – 10.4.74.165	10.4.74.165
84	10.4.74.166/31	10.4.74.166 – 10.4.74.167	10.4.74.167
85	10.4.74.168/31	10.4.74.168 – 10.4.74.169	10.4.74.169
86	10.4.74.170/31	10.4.74.170 – 10.4.74.171	10.4.74.171
87	10.4.74.172/31	10.4.74.172 – 10.4.74.173	10.4.74.173
88	10.4.74.174/31	10.4.74.174 – 10.4.74.175	10.4.74.175
89	10.4.74.176/31	10.4.74.176 – 10.4.74.177	10.4.74.177
90	10.4.74.178/31	10.4.74.178 – 10.4.74.179	10.4.74.179
91	10.4.74.180/31	10.4.74.180 – 10.4.74.181	10.4.74.181
92	10.4.74.182/31	10.4.74.182 – 10.4.74.183	10.4.74.183
93	10.4.74.184/31	10.4.74.184 – 10.4.74.185	10.4.74.185
94	10.4.74.186/31	10.4.74.186 – 10.4.74.187	10.4.74.187
95	10.4.74.188/31	10.4.74.188 – 10.4.74.189	10.4.74.189
96	10.4.74.190/31	10.4.74.190 – 10.4.74.191	10.4.74.191
97	10.4.74.192/31	10.4.74.192 – 10.4.74.193	10.4.74.193
98	10.4.74.194/31	10.4.74.194 – 10.4.74.195	10.4.74.195
99	10.4.74.196/31	10.4.74.196 – 10.4.74.197	10.4.74.197
100	10.4.74.198/31	10.4.74.198 – 10.4.74.199	10.4.74.199
101	10.4.74.200/31	10.4.74.200 – 10.4.74.201	10.4.74.201
102	10.4.74.202/31	10.4.74.202 – 10.4.74.203	10.4.74.203
103	10.4.74.204/31	10.4.74.204 – 10.4.74.205	10.4.74.205
104	10.4.74.206/31	10.4.74.206 – 10.4.74.207	10.4.74.207
105	10.4.74.208/31	10.4.74.208 – 10.4.74.209	10.4.74.209
106	10.4.74.210/31	10.4.74.210 – 10.4.74.211	10.4.74.211
107	10.4.74.212/31	10.4.74.212 – 10.4.74.213	10.4.74.213
108	10.4.74.214/31	10.4.74.214 – 10.4.74.215	10.4.74.215
109	10.4.74.216/31	10.4.74.216 – 10.4.74.217	10.4.74.217
110	10.4.74.218/31	10.4.74.218 – 10.4.74.219	10.4.74.219
111	10.4.74.220/31	10.4.74.220 – 10.4.74.221	10.4.74.221
112	10.4.74.222/31	10.4.74.222 – 10.4.74.223	10.4.74.223
113	10.4.74.224/31	10.4.74.224 – 10.4.74.225	10.4.74.225
114	10.4.74.226/31	10.4.74.226 – 10.4.74.227	10.4.74.227
115	10.4.74.228/31	10.4.74.228 – 10.4.74.229	10.4.74.229
116	10.4.74.230/31	10.4.74.230 – 10.4.74.231	10.4.74.231
117	10.4.74.232/31	10.4.74.232 – 10.4.74.233	10.4.74.233
118	10.4.74.234/31	10.4.74.234 – 10.4.74.235	10.4.74.235
119	10.4.74.236/31	10.4.74.236 – 10.4.74.237	10.4.74.237
120	10.4.74.238/31	10.4.74.238 – 10.4.74.239	10.4.74.239
121	10.4.74.240/31	10.4.74.240 – 10.4.74.241	10.4.74.241
122	10.4.74.242/31	10.4.74.242 – 10.4.74.243	10.4.74.243
123	10.4.74.244/31	10.4.74.244 – 10.4.74.245	10.4.74.245
124	10.4.74.246/31	10.4.74.246 – 10.4.74.247	10.4.74.247
125	10.4.74.248/31	10.4.74.248 – 10.4.74.249	10.4.74.249
126	10.4.74.250/31	10.4.74.250 – 10.4.74.251	10.4.74.251
127	10.4.74.252/31	10.4.74.252 – 10.4.74.253	10.4.74.253
128	10.4.74.254/31	10.4.74.254 – 10.4.74.255	10.4.74.255

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 →