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)10.0.194.0/24

network10.0.194.0/24

broadcast10.0.194.255

first host10.0.194.1

last host10.0.194.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.194.0/24

address00001010.00000000.11000010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11000010.00000000

broadcast00001010.00000000.11000010.11111111

green = network part, grey = host part

hex0x0a00c200

decimal167821824

reverse dns0.194.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:c200

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.194.0/31	10.0.194.0 – 10.0.194.1	10.0.194.1
2	10.0.194.2/31	10.0.194.2 – 10.0.194.3	10.0.194.3
3	10.0.194.4/31	10.0.194.4 – 10.0.194.5	10.0.194.5
4	10.0.194.6/31	10.0.194.6 – 10.0.194.7	10.0.194.7
5	10.0.194.8/31	10.0.194.8 – 10.0.194.9	10.0.194.9
6	10.0.194.10/31	10.0.194.10 – 10.0.194.11	10.0.194.11
7	10.0.194.12/31	10.0.194.12 – 10.0.194.13	10.0.194.13
8	10.0.194.14/31	10.0.194.14 – 10.0.194.15	10.0.194.15
9	10.0.194.16/31	10.0.194.16 – 10.0.194.17	10.0.194.17
10	10.0.194.18/31	10.0.194.18 – 10.0.194.19	10.0.194.19
11	10.0.194.20/31	10.0.194.20 – 10.0.194.21	10.0.194.21
12	10.0.194.22/31	10.0.194.22 – 10.0.194.23	10.0.194.23
13	10.0.194.24/31	10.0.194.24 – 10.0.194.25	10.0.194.25
14	10.0.194.26/31	10.0.194.26 – 10.0.194.27	10.0.194.27
15	10.0.194.28/31	10.0.194.28 – 10.0.194.29	10.0.194.29
16	10.0.194.30/31	10.0.194.30 – 10.0.194.31	10.0.194.31
17	10.0.194.32/31	10.0.194.32 – 10.0.194.33	10.0.194.33
18	10.0.194.34/31	10.0.194.34 – 10.0.194.35	10.0.194.35
19	10.0.194.36/31	10.0.194.36 – 10.0.194.37	10.0.194.37
20	10.0.194.38/31	10.0.194.38 – 10.0.194.39	10.0.194.39
21	10.0.194.40/31	10.0.194.40 – 10.0.194.41	10.0.194.41
22	10.0.194.42/31	10.0.194.42 – 10.0.194.43	10.0.194.43
23	10.0.194.44/31	10.0.194.44 – 10.0.194.45	10.0.194.45
24	10.0.194.46/31	10.0.194.46 – 10.0.194.47	10.0.194.47
25	10.0.194.48/31	10.0.194.48 – 10.0.194.49	10.0.194.49
26	10.0.194.50/31	10.0.194.50 – 10.0.194.51	10.0.194.51
27	10.0.194.52/31	10.0.194.52 – 10.0.194.53	10.0.194.53
28	10.0.194.54/31	10.0.194.54 – 10.0.194.55	10.0.194.55
29	10.0.194.56/31	10.0.194.56 – 10.0.194.57	10.0.194.57
30	10.0.194.58/31	10.0.194.58 – 10.0.194.59	10.0.194.59
31	10.0.194.60/31	10.0.194.60 – 10.0.194.61	10.0.194.61
32	10.0.194.62/31	10.0.194.62 – 10.0.194.63	10.0.194.63
33	10.0.194.64/31	10.0.194.64 – 10.0.194.65	10.0.194.65
34	10.0.194.66/31	10.0.194.66 – 10.0.194.67	10.0.194.67
35	10.0.194.68/31	10.0.194.68 – 10.0.194.69	10.0.194.69
36	10.0.194.70/31	10.0.194.70 – 10.0.194.71	10.0.194.71
37	10.0.194.72/31	10.0.194.72 – 10.0.194.73	10.0.194.73
38	10.0.194.74/31	10.0.194.74 – 10.0.194.75	10.0.194.75
39	10.0.194.76/31	10.0.194.76 – 10.0.194.77	10.0.194.77
40	10.0.194.78/31	10.0.194.78 – 10.0.194.79	10.0.194.79
41	10.0.194.80/31	10.0.194.80 – 10.0.194.81	10.0.194.81
42	10.0.194.82/31	10.0.194.82 – 10.0.194.83	10.0.194.83
43	10.0.194.84/31	10.0.194.84 – 10.0.194.85	10.0.194.85
44	10.0.194.86/31	10.0.194.86 – 10.0.194.87	10.0.194.87
45	10.0.194.88/31	10.0.194.88 – 10.0.194.89	10.0.194.89
46	10.0.194.90/31	10.0.194.90 – 10.0.194.91	10.0.194.91
47	10.0.194.92/31	10.0.194.92 – 10.0.194.93	10.0.194.93
48	10.0.194.94/31	10.0.194.94 – 10.0.194.95	10.0.194.95
49	10.0.194.96/31	10.0.194.96 – 10.0.194.97	10.0.194.97
50	10.0.194.98/31	10.0.194.98 – 10.0.194.99	10.0.194.99
51	10.0.194.100/31	10.0.194.100 – 10.0.194.101	10.0.194.101
52	10.0.194.102/31	10.0.194.102 – 10.0.194.103	10.0.194.103
53	10.0.194.104/31	10.0.194.104 – 10.0.194.105	10.0.194.105
54	10.0.194.106/31	10.0.194.106 – 10.0.194.107	10.0.194.107
55	10.0.194.108/31	10.0.194.108 – 10.0.194.109	10.0.194.109
56	10.0.194.110/31	10.0.194.110 – 10.0.194.111	10.0.194.111
57	10.0.194.112/31	10.0.194.112 – 10.0.194.113	10.0.194.113
58	10.0.194.114/31	10.0.194.114 – 10.0.194.115	10.0.194.115
59	10.0.194.116/31	10.0.194.116 – 10.0.194.117	10.0.194.117
60	10.0.194.118/31	10.0.194.118 – 10.0.194.119	10.0.194.119
61	10.0.194.120/31	10.0.194.120 – 10.0.194.121	10.0.194.121
62	10.0.194.122/31	10.0.194.122 – 10.0.194.123	10.0.194.123
63	10.0.194.124/31	10.0.194.124 – 10.0.194.125	10.0.194.125
64	10.0.194.126/31	10.0.194.126 – 10.0.194.127	10.0.194.127
65	10.0.194.128/31	10.0.194.128 – 10.0.194.129	10.0.194.129
66	10.0.194.130/31	10.0.194.130 – 10.0.194.131	10.0.194.131
67	10.0.194.132/31	10.0.194.132 – 10.0.194.133	10.0.194.133
68	10.0.194.134/31	10.0.194.134 – 10.0.194.135	10.0.194.135
69	10.0.194.136/31	10.0.194.136 – 10.0.194.137	10.0.194.137
70	10.0.194.138/31	10.0.194.138 – 10.0.194.139	10.0.194.139
71	10.0.194.140/31	10.0.194.140 – 10.0.194.141	10.0.194.141
72	10.0.194.142/31	10.0.194.142 – 10.0.194.143	10.0.194.143
73	10.0.194.144/31	10.0.194.144 – 10.0.194.145	10.0.194.145
74	10.0.194.146/31	10.0.194.146 – 10.0.194.147	10.0.194.147
75	10.0.194.148/31	10.0.194.148 – 10.0.194.149	10.0.194.149
76	10.0.194.150/31	10.0.194.150 – 10.0.194.151	10.0.194.151
77	10.0.194.152/31	10.0.194.152 – 10.0.194.153	10.0.194.153
78	10.0.194.154/31	10.0.194.154 – 10.0.194.155	10.0.194.155
79	10.0.194.156/31	10.0.194.156 – 10.0.194.157	10.0.194.157
80	10.0.194.158/31	10.0.194.158 – 10.0.194.159	10.0.194.159
81	10.0.194.160/31	10.0.194.160 – 10.0.194.161	10.0.194.161
82	10.0.194.162/31	10.0.194.162 – 10.0.194.163	10.0.194.163
83	10.0.194.164/31	10.0.194.164 – 10.0.194.165	10.0.194.165
84	10.0.194.166/31	10.0.194.166 – 10.0.194.167	10.0.194.167
85	10.0.194.168/31	10.0.194.168 – 10.0.194.169	10.0.194.169
86	10.0.194.170/31	10.0.194.170 – 10.0.194.171	10.0.194.171
87	10.0.194.172/31	10.0.194.172 – 10.0.194.173	10.0.194.173
88	10.0.194.174/31	10.0.194.174 – 10.0.194.175	10.0.194.175
89	10.0.194.176/31	10.0.194.176 – 10.0.194.177	10.0.194.177
90	10.0.194.178/31	10.0.194.178 – 10.0.194.179	10.0.194.179
91	10.0.194.180/31	10.0.194.180 – 10.0.194.181	10.0.194.181
92	10.0.194.182/31	10.0.194.182 – 10.0.194.183	10.0.194.183
93	10.0.194.184/31	10.0.194.184 – 10.0.194.185	10.0.194.185
94	10.0.194.186/31	10.0.194.186 – 10.0.194.187	10.0.194.187
95	10.0.194.188/31	10.0.194.188 – 10.0.194.189	10.0.194.189
96	10.0.194.190/31	10.0.194.190 – 10.0.194.191	10.0.194.191
97	10.0.194.192/31	10.0.194.192 – 10.0.194.193	10.0.194.193
98	10.0.194.194/31	10.0.194.194 – 10.0.194.195	10.0.194.195
99	10.0.194.196/31	10.0.194.196 – 10.0.194.197	10.0.194.197
100	10.0.194.198/31	10.0.194.198 – 10.0.194.199	10.0.194.199
101	10.0.194.200/31	10.0.194.200 – 10.0.194.201	10.0.194.201
102	10.0.194.202/31	10.0.194.202 – 10.0.194.203	10.0.194.203
103	10.0.194.204/31	10.0.194.204 – 10.0.194.205	10.0.194.205
104	10.0.194.206/31	10.0.194.206 – 10.0.194.207	10.0.194.207
105	10.0.194.208/31	10.0.194.208 – 10.0.194.209	10.0.194.209
106	10.0.194.210/31	10.0.194.210 – 10.0.194.211	10.0.194.211
107	10.0.194.212/31	10.0.194.212 – 10.0.194.213	10.0.194.213
108	10.0.194.214/31	10.0.194.214 – 10.0.194.215	10.0.194.215
109	10.0.194.216/31	10.0.194.216 – 10.0.194.217	10.0.194.217
110	10.0.194.218/31	10.0.194.218 – 10.0.194.219	10.0.194.219
111	10.0.194.220/31	10.0.194.220 – 10.0.194.221	10.0.194.221
112	10.0.194.222/31	10.0.194.222 – 10.0.194.223	10.0.194.223
113	10.0.194.224/31	10.0.194.224 – 10.0.194.225	10.0.194.225
114	10.0.194.226/31	10.0.194.226 – 10.0.194.227	10.0.194.227
115	10.0.194.228/31	10.0.194.228 – 10.0.194.229	10.0.194.229
116	10.0.194.230/31	10.0.194.230 – 10.0.194.231	10.0.194.231
117	10.0.194.232/31	10.0.194.232 – 10.0.194.233	10.0.194.233
118	10.0.194.234/31	10.0.194.234 – 10.0.194.235	10.0.194.235
119	10.0.194.236/31	10.0.194.236 – 10.0.194.237	10.0.194.237
120	10.0.194.238/31	10.0.194.238 – 10.0.194.239	10.0.194.239
121	10.0.194.240/31	10.0.194.240 – 10.0.194.241	10.0.194.241
122	10.0.194.242/31	10.0.194.242 – 10.0.194.243	10.0.194.243
123	10.0.194.244/31	10.0.194.244 – 10.0.194.245	10.0.194.245
124	10.0.194.246/31	10.0.194.246 – 10.0.194.247	10.0.194.247
125	10.0.194.248/31	10.0.194.248 – 10.0.194.249	10.0.194.249
126	10.0.194.250/31	10.0.194.250 – 10.0.194.251	10.0.194.251
127	10.0.194.252/31	10.0.194.252 – 10.0.194.253	10.0.194.253
128	10.0.194.254/31	10.0.194.254 – 10.0.194.255	10.0.194.255

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 →