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)10.167.116.128/25

network10.167.116.128/25

broadcast10.167.116.255

first host10.167.116.129

last host10.167.116.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.116.128/25

address00001010.10100111.01110100.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01110100.10000000

broadcast00001010.10100111.01110100.11111111

green = network part, grey = host part

hex0x0aa77480

decimal178746496

reverse dns128.116.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7480

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.116.128/32	10.167.116.128 – 10.167.116.128	10.167.116.128
2	10.167.116.129/32	10.167.116.129 – 10.167.116.129	10.167.116.129
3	10.167.116.130/32	10.167.116.130 – 10.167.116.130	10.167.116.130
4	10.167.116.131/32	10.167.116.131 – 10.167.116.131	10.167.116.131
5	10.167.116.132/32	10.167.116.132 – 10.167.116.132	10.167.116.132
6	10.167.116.133/32	10.167.116.133 – 10.167.116.133	10.167.116.133
7	10.167.116.134/32	10.167.116.134 – 10.167.116.134	10.167.116.134
8	10.167.116.135/32	10.167.116.135 – 10.167.116.135	10.167.116.135
9	10.167.116.136/32	10.167.116.136 – 10.167.116.136	10.167.116.136
10	10.167.116.137/32	10.167.116.137 – 10.167.116.137	10.167.116.137
11	10.167.116.138/32	10.167.116.138 – 10.167.116.138	10.167.116.138
12	10.167.116.139/32	10.167.116.139 – 10.167.116.139	10.167.116.139
13	10.167.116.140/32	10.167.116.140 – 10.167.116.140	10.167.116.140
14	10.167.116.141/32	10.167.116.141 – 10.167.116.141	10.167.116.141
15	10.167.116.142/32	10.167.116.142 – 10.167.116.142	10.167.116.142
16	10.167.116.143/32	10.167.116.143 – 10.167.116.143	10.167.116.143
17	10.167.116.144/32	10.167.116.144 – 10.167.116.144	10.167.116.144
18	10.167.116.145/32	10.167.116.145 – 10.167.116.145	10.167.116.145
19	10.167.116.146/32	10.167.116.146 – 10.167.116.146	10.167.116.146
20	10.167.116.147/32	10.167.116.147 – 10.167.116.147	10.167.116.147
21	10.167.116.148/32	10.167.116.148 – 10.167.116.148	10.167.116.148
22	10.167.116.149/32	10.167.116.149 – 10.167.116.149	10.167.116.149
23	10.167.116.150/32	10.167.116.150 – 10.167.116.150	10.167.116.150
24	10.167.116.151/32	10.167.116.151 – 10.167.116.151	10.167.116.151
25	10.167.116.152/32	10.167.116.152 – 10.167.116.152	10.167.116.152
26	10.167.116.153/32	10.167.116.153 – 10.167.116.153	10.167.116.153
27	10.167.116.154/32	10.167.116.154 – 10.167.116.154	10.167.116.154
28	10.167.116.155/32	10.167.116.155 – 10.167.116.155	10.167.116.155
29	10.167.116.156/32	10.167.116.156 – 10.167.116.156	10.167.116.156
30	10.167.116.157/32	10.167.116.157 – 10.167.116.157	10.167.116.157
31	10.167.116.158/32	10.167.116.158 – 10.167.116.158	10.167.116.158
32	10.167.116.159/32	10.167.116.159 – 10.167.116.159	10.167.116.159
33	10.167.116.160/32	10.167.116.160 – 10.167.116.160	10.167.116.160
34	10.167.116.161/32	10.167.116.161 – 10.167.116.161	10.167.116.161
35	10.167.116.162/32	10.167.116.162 – 10.167.116.162	10.167.116.162
36	10.167.116.163/32	10.167.116.163 – 10.167.116.163	10.167.116.163
37	10.167.116.164/32	10.167.116.164 – 10.167.116.164	10.167.116.164
38	10.167.116.165/32	10.167.116.165 – 10.167.116.165	10.167.116.165
39	10.167.116.166/32	10.167.116.166 – 10.167.116.166	10.167.116.166
40	10.167.116.167/32	10.167.116.167 – 10.167.116.167	10.167.116.167
41	10.167.116.168/32	10.167.116.168 – 10.167.116.168	10.167.116.168
42	10.167.116.169/32	10.167.116.169 – 10.167.116.169	10.167.116.169
43	10.167.116.170/32	10.167.116.170 – 10.167.116.170	10.167.116.170
44	10.167.116.171/32	10.167.116.171 – 10.167.116.171	10.167.116.171
45	10.167.116.172/32	10.167.116.172 – 10.167.116.172	10.167.116.172
46	10.167.116.173/32	10.167.116.173 – 10.167.116.173	10.167.116.173
47	10.167.116.174/32	10.167.116.174 – 10.167.116.174	10.167.116.174
48	10.167.116.175/32	10.167.116.175 – 10.167.116.175	10.167.116.175
49	10.167.116.176/32	10.167.116.176 – 10.167.116.176	10.167.116.176
50	10.167.116.177/32	10.167.116.177 – 10.167.116.177	10.167.116.177
51	10.167.116.178/32	10.167.116.178 – 10.167.116.178	10.167.116.178
52	10.167.116.179/32	10.167.116.179 – 10.167.116.179	10.167.116.179
53	10.167.116.180/32	10.167.116.180 – 10.167.116.180	10.167.116.180
54	10.167.116.181/32	10.167.116.181 – 10.167.116.181	10.167.116.181
55	10.167.116.182/32	10.167.116.182 – 10.167.116.182	10.167.116.182
56	10.167.116.183/32	10.167.116.183 – 10.167.116.183	10.167.116.183
57	10.167.116.184/32	10.167.116.184 – 10.167.116.184	10.167.116.184
58	10.167.116.185/32	10.167.116.185 – 10.167.116.185	10.167.116.185
59	10.167.116.186/32	10.167.116.186 – 10.167.116.186	10.167.116.186
60	10.167.116.187/32	10.167.116.187 – 10.167.116.187	10.167.116.187
61	10.167.116.188/32	10.167.116.188 – 10.167.116.188	10.167.116.188
62	10.167.116.189/32	10.167.116.189 – 10.167.116.189	10.167.116.189
63	10.167.116.190/32	10.167.116.190 – 10.167.116.190	10.167.116.190
64	10.167.116.191/32	10.167.116.191 – 10.167.116.191	10.167.116.191
65	10.167.116.192/32	10.167.116.192 – 10.167.116.192	10.167.116.192
66	10.167.116.193/32	10.167.116.193 – 10.167.116.193	10.167.116.193
67	10.167.116.194/32	10.167.116.194 – 10.167.116.194	10.167.116.194
68	10.167.116.195/32	10.167.116.195 – 10.167.116.195	10.167.116.195
69	10.167.116.196/32	10.167.116.196 – 10.167.116.196	10.167.116.196
70	10.167.116.197/32	10.167.116.197 – 10.167.116.197	10.167.116.197
71	10.167.116.198/32	10.167.116.198 – 10.167.116.198	10.167.116.198
72	10.167.116.199/32	10.167.116.199 – 10.167.116.199	10.167.116.199
73	10.167.116.200/32	10.167.116.200 – 10.167.116.200	10.167.116.200
74	10.167.116.201/32	10.167.116.201 – 10.167.116.201	10.167.116.201
75	10.167.116.202/32	10.167.116.202 – 10.167.116.202	10.167.116.202
76	10.167.116.203/32	10.167.116.203 – 10.167.116.203	10.167.116.203
77	10.167.116.204/32	10.167.116.204 – 10.167.116.204	10.167.116.204
78	10.167.116.205/32	10.167.116.205 – 10.167.116.205	10.167.116.205
79	10.167.116.206/32	10.167.116.206 – 10.167.116.206	10.167.116.206
80	10.167.116.207/32	10.167.116.207 – 10.167.116.207	10.167.116.207
81	10.167.116.208/32	10.167.116.208 – 10.167.116.208	10.167.116.208
82	10.167.116.209/32	10.167.116.209 – 10.167.116.209	10.167.116.209
83	10.167.116.210/32	10.167.116.210 – 10.167.116.210	10.167.116.210
84	10.167.116.211/32	10.167.116.211 – 10.167.116.211	10.167.116.211
85	10.167.116.212/32	10.167.116.212 – 10.167.116.212	10.167.116.212
86	10.167.116.213/32	10.167.116.213 – 10.167.116.213	10.167.116.213
87	10.167.116.214/32	10.167.116.214 – 10.167.116.214	10.167.116.214
88	10.167.116.215/32	10.167.116.215 – 10.167.116.215	10.167.116.215
89	10.167.116.216/32	10.167.116.216 – 10.167.116.216	10.167.116.216
90	10.167.116.217/32	10.167.116.217 – 10.167.116.217	10.167.116.217
91	10.167.116.218/32	10.167.116.218 – 10.167.116.218	10.167.116.218
92	10.167.116.219/32	10.167.116.219 – 10.167.116.219	10.167.116.219
93	10.167.116.220/32	10.167.116.220 – 10.167.116.220	10.167.116.220
94	10.167.116.221/32	10.167.116.221 – 10.167.116.221	10.167.116.221
95	10.167.116.222/32	10.167.116.222 – 10.167.116.222	10.167.116.222
96	10.167.116.223/32	10.167.116.223 – 10.167.116.223	10.167.116.223
97	10.167.116.224/32	10.167.116.224 – 10.167.116.224	10.167.116.224
98	10.167.116.225/32	10.167.116.225 – 10.167.116.225	10.167.116.225
99	10.167.116.226/32	10.167.116.226 – 10.167.116.226	10.167.116.226
100	10.167.116.227/32	10.167.116.227 – 10.167.116.227	10.167.116.227
101	10.167.116.228/32	10.167.116.228 – 10.167.116.228	10.167.116.228
102	10.167.116.229/32	10.167.116.229 – 10.167.116.229	10.167.116.229
103	10.167.116.230/32	10.167.116.230 – 10.167.116.230	10.167.116.230
104	10.167.116.231/32	10.167.116.231 – 10.167.116.231	10.167.116.231
105	10.167.116.232/32	10.167.116.232 – 10.167.116.232	10.167.116.232
106	10.167.116.233/32	10.167.116.233 – 10.167.116.233	10.167.116.233
107	10.167.116.234/32	10.167.116.234 – 10.167.116.234	10.167.116.234
108	10.167.116.235/32	10.167.116.235 – 10.167.116.235	10.167.116.235
109	10.167.116.236/32	10.167.116.236 – 10.167.116.236	10.167.116.236
110	10.167.116.237/32	10.167.116.237 – 10.167.116.237	10.167.116.237
111	10.167.116.238/32	10.167.116.238 – 10.167.116.238	10.167.116.238
112	10.167.116.239/32	10.167.116.239 – 10.167.116.239	10.167.116.239
113	10.167.116.240/32	10.167.116.240 – 10.167.116.240	10.167.116.240
114	10.167.116.241/32	10.167.116.241 – 10.167.116.241	10.167.116.241
115	10.167.116.242/32	10.167.116.242 – 10.167.116.242	10.167.116.242
116	10.167.116.243/32	10.167.116.243 – 10.167.116.243	10.167.116.243
117	10.167.116.244/32	10.167.116.244 – 10.167.116.244	10.167.116.244
118	10.167.116.245/32	10.167.116.245 – 10.167.116.245	10.167.116.245
119	10.167.116.246/32	10.167.116.246 – 10.167.116.246	10.167.116.246
120	10.167.116.247/32	10.167.116.247 – 10.167.116.247	10.167.116.247
121	10.167.116.248/32	10.167.116.248 – 10.167.116.248	10.167.116.248
122	10.167.116.249/32	10.167.116.249 – 10.167.116.249	10.167.116.249
123	10.167.116.250/32	10.167.116.250 – 10.167.116.250	10.167.116.250
124	10.167.116.251/32	10.167.116.251 – 10.167.116.251	10.167.116.251
125	10.167.116.252/32	10.167.116.252 – 10.167.116.252	10.167.116.252
126	10.167.116.253/32	10.167.116.253 – 10.167.116.253	10.167.116.253
127	10.167.116.254/32	10.167.116.254 – 10.167.116.254	10.167.116.254
128	10.167.116.255/32	10.167.116.255 – 10.167.116.255	10.167.116.255

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 /25
/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	-
/25	255.255.255.128	128	126	1
/26	255.255.255.192	64	62	2 split →
/27	255.255.255.224	32	30	4 split →
/28	255.255.255.240	16	14	8 split →
/29	255.255.255.248	8	6	16 split →
/30	255.255.255.252	4	2	32 split →
/31	255.255.255.254	2	2	64 split →
/32	255.255.255.255	1	1	128 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 →