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)10.167.62.128/25

network10.167.62.128/25

broadcast10.167.62.255

first host10.167.62.129

last host10.167.62.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.62.128/25

address00001010.10100111.00111110.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00111110.10000000

broadcast00001010.10100111.00111110.11111111

green = network part, grey = host part

hex0x0aa73e80

decimal178732672

reverse dns128.62.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3e80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.62.128/32	10.167.62.128 – 10.167.62.128	10.167.62.128
2	10.167.62.129/32	10.167.62.129 – 10.167.62.129	10.167.62.129
3	10.167.62.130/32	10.167.62.130 – 10.167.62.130	10.167.62.130
4	10.167.62.131/32	10.167.62.131 – 10.167.62.131	10.167.62.131
5	10.167.62.132/32	10.167.62.132 – 10.167.62.132	10.167.62.132
6	10.167.62.133/32	10.167.62.133 – 10.167.62.133	10.167.62.133
7	10.167.62.134/32	10.167.62.134 – 10.167.62.134	10.167.62.134
8	10.167.62.135/32	10.167.62.135 – 10.167.62.135	10.167.62.135
9	10.167.62.136/32	10.167.62.136 – 10.167.62.136	10.167.62.136
10	10.167.62.137/32	10.167.62.137 – 10.167.62.137	10.167.62.137
11	10.167.62.138/32	10.167.62.138 – 10.167.62.138	10.167.62.138
12	10.167.62.139/32	10.167.62.139 – 10.167.62.139	10.167.62.139
13	10.167.62.140/32	10.167.62.140 – 10.167.62.140	10.167.62.140
14	10.167.62.141/32	10.167.62.141 – 10.167.62.141	10.167.62.141
15	10.167.62.142/32	10.167.62.142 – 10.167.62.142	10.167.62.142
16	10.167.62.143/32	10.167.62.143 – 10.167.62.143	10.167.62.143
17	10.167.62.144/32	10.167.62.144 – 10.167.62.144	10.167.62.144
18	10.167.62.145/32	10.167.62.145 – 10.167.62.145	10.167.62.145
19	10.167.62.146/32	10.167.62.146 – 10.167.62.146	10.167.62.146
20	10.167.62.147/32	10.167.62.147 – 10.167.62.147	10.167.62.147
21	10.167.62.148/32	10.167.62.148 – 10.167.62.148	10.167.62.148
22	10.167.62.149/32	10.167.62.149 – 10.167.62.149	10.167.62.149
23	10.167.62.150/32	10.167.62.150 – 10.167.62.150	10.167.62.150
24	10.167.62.151/32	10.167.62.151 – 10.167.62.151	10.167.62.151
25	10.167.62.152/32	10.167.62.152 – 10.167.62.152	10.167.62.152
26	10.167.62.153/32	10.167.62.153 – 10.167.62.153	10.167.62.153
27	10.167.62.154/32	10.167.62.154 – 10.167.62.154	10.167.62.154
28	10.167.62.155/32	10.167.62.155 – 10.167.62.155	10.167.62.155
29	10.167.62.156/32	10.167.62.156 – 10.167.62.156	10.167.62.156
30	10.167.62.157/32	10.167.62.157 – 10.167.62.157	10.167.62.157
31	10.167.62.158/32	10.167.62.158 – 10.167.62.158	10.167.62.158
32	10.167.62.159/32	10.167.62.159 – 10.167.62.159	10.167.62.159
33	10.167.62.160/32	10.167.62.160 – 10.167.62.160	10.167.62.160
34	10.167.62.161/32	10.167.62.161 – 10.167.62.161	10.167.62.161
35	10.167.62.162/32	10.167.62.162 – 10.167.62.162	10.167.62.162
36	10.167.62.163/32	10.167.62.163 – 10.167.62.163	10.167.62.163
37	10.167.62.164/32	10.167.62.164 – 10.167.62.164	10.167.62.164
38	10.167.62.165/32	10.167.62.165 – 10.167.62.165	10.167.62.165
39	10.167.62.166/32	10.167.62.166 – 10.167.62.166	10.167.62.166
40	10.167.62.167/32	10.167.62.167 – 10.167.62.167	10.167.62.167
41	10.167.62.168/32	10.167.62.168 – 10.167.62.168	10.167.62.168
42	10.167.62.169/32	10.167.62.169 – 10.167.62.169	10.167.62.169
43	10.167.62.170/32	10.167.62.170 – 10.167.62.170	10.167.62.170
44	10.167.62.171/32	10.167.62.171 – 10.167.62.171	10.167.62.171
45	10.167.62.172/32	10.167.62.172 – 10.167.62.172	10.167.62.172
46	10.167.62.173/32	10.167.62.173 – 10.167.62.173	10.167.62.173
47	10.167.62.174/32	10.167.62.174 – 10.167.62.174	10.167.62.174
48	10.167.62.175/32	10.167.62.175 – 10.167.62.175	10.167.62.175
49	10.167.62.176/32	10.167.62.176 – 10.167.62.176	10.167.62.176
50	10.167.62.177/32	10.167.62.177 – 10.167.62.177	10.167.62.177
51	10.167.62.178/32	10.167.62.178 – 10.167.62.178	10.167.62.178
52	10.167.62.179/32	10.167.62.179 – 10.167.62.179	10.167.62.179
53	10.167.62.180/32	10.167.62.180 – 10.167.62.180	10.167.62.180
54	10.167.62.181/32	10.167.62.181 – 10.167.62.181	10.167.62.181
55	10.167.62.182/32	10.167.62.182 – 10.167.62.182	10.167.62.182
56	10.167.62.183/32	10.167.62.183 – 10.167.62.183	10.167.62.183
57	10.167.62.184/32	10.167.62.184 – 10.167.62.184	10.167.62.184
58	10.167.62.185/32	10.167.62.185 – 10.167.62.185	10.167.62.185
59	10.167.62.186/32	10.167.62.186 – 10.167.62.186	10.167.62.186
60	10.167.62.187/32	10.167.62.187 – 10.167.62.187	10.167.62.187
61	10.167.62.188/32	10.167.62.188 – 10.167.62.188	10.167.62.188
62	10.167.62.189/32	10.167.62.189 – 10.167.62.189	10.167.62.189
63	10.167.62.190/32	10.167.62.190 – 10.167.62.190	10.167.62.190
64	10.167.62.191/32	10.167.62.191 – 10.167.62.191	10.167.62.191
65	10.167.62.192/32	10.167.62.192 – 10.167.62.192	10.167.62.192
66	10.167.62.193/32	10.167.62.193 – 10.167.62.193	10.167.62.193
67	10.167.62.194/32	10.167.62.194 – 10.167.62.194	10.167.62.194
68	10.167.62.195/32	10.167.62.195 – 10.167.62.195	10.167.62.195
69	10.167.62.196/32	10.167.62.196 – 10.167.62.196	10.167.62.196
70	10.167.62.197/32	10.167.62.197 – 10.167.62.197	10.167.62.197
71	10.167.62.198/32	10.167.62.198 – 10.167.62.198	10.167.62.198
72	10.167.62.199/32	10.167.62.199 – 10.167.62.199	10.167.62.199
73	10.167.62.200/32	10.167.62.200 – 10.167.62.200	10.167.62.200
74	10.167.62.201/32	10.167.62.201 – 10.167.62.201	10.167.62.201
75	10.167.62.202/32	10.167.62.202 – 10.167.62.202	10.167.62.202
76	10.167.62.203/32	10.167.62.203 – 10.167.62.203	10.167.62.203
77	10.167.62.204/32	10.167.62.204 – 10.167.62.204	10.167.62.204
78	10.167.62.205/32	10.167.62.205 – 10.167.62.205	10.167.62.205
79	10.167.62.206/32	10.167.62.206 – 10.167.62.206	10.167.62.206
80	10.167.62.207/32	10.167.62.207 – 10.167.62.207	10.167.62.207
81	10.167.62.208/32	10.167.62.208 – 10.167.62.208	10.167.62.208
82	10.167.62.209/32	10.167.62.209 – 10.167.62.209	10.167.62.209
83	10.167.62.210/32	10.167.62.210 – 10.167.62.210	10.167.62.210
84	10.167.62.211/32	10.167.62.211 – 10.167.62.211	10.167.62.211
85	10.167.62.212/32	10.167.62.212 – 10.167.62.212	10.167.62.212
86	10.167.62.213/32	10.167.62.213 – 10.167.62.213	10.167.62.213
87	10.167.62.214/32	10.167.62.214 – 10.167.62.214	10.167.62.214
88	10.167.62.215/32	10.167.62.215 – 10.167.62.215	10.167.62.215
89	10.167.62.216/32	10.167.62.216 – 10.167.62.216	10.167.62.216
90	10.167.62.217/32	10.167.62.217 – 10.167.62.217	10.167.62.217
91	10.167.62.218/32	10.167.62.218 – 10.167.62.218	10.167.62.218
92	10.167.62.219/32	10.167.62.219 – 10.167.62.219	10.167.62.219
93	10.167.62.220/32	10.167.62.220 – 10.167.62.220	10.167.62.220
94	10.167.62.221/32	10.167.62.221 – 10.167.62.221	10.167.62.221
95	10.167.62.222/32	10.167.62.222 – 10.167.62.222	10.167.62.222
96	10.167.62.223/32	10.167.62.223 – 10.167.62.223	10.167.62.223
97	10.167.62.224/32	10.167.62.224 – 10.167.62.224	10.167.62.224
98	10.167.62.225/32	10.167.62.225 – 10.167.62.225	10.167.62.225
99	10.167.62.226/32	10.167.62.226 – 10.167.62.226	10.167.62.226
100	10.167.62.227/32	10.167.62.227 – 10.167.62.227	10.167.62.227
101	10.167.62.228/32	10.167.62.228 – 10.167.62.228	10.167.62.228
102	10.167.62.229/32	10.167.62.229 – 10.167.62.229	10.167.62.229
103	10.167.62.230/32	10.167.62.230 – 10.167.62.230	10.167.62.230
104	10.167.62.231/32	10.167.62.231 – 10.167.62.231	10.167.62.231
105	10.167.62.232/32	10.167.62.232 – 10.167.62.232	10.167.62.232
106	10.167.62.233/32	10.167.62.233 – 10.167.62.233	10.167.62.233
107	10.167.62.234/32	10.167.62.234 – 10.167.62.234	10.167.62.234
108	10.167.62.235/32	10.167.62.235 – 10.167.62.235	10.167.62.235
109	10.167.62.236/32	10.167.62.236 – 10.167.62.236	10.167.62.236
110	10.167.62.237/32	10.167.62.237 – 10.167.62.237	10.167.62.237
111	10.167.62.238/32	10.167.62.238 – 10.167.62.238	10.167.62.238
112	10.167.62.239/32	10.167.62.239 – 10.167.62.239	10.167.62.239
113	10.167.62.240/32	10.167.62.240 – 10.167.62.240	10.167.62.240
114	10.167.62.241/32	10.167.62.241 – 10.167.62.241	10.167.62.241
115	10.167.62.242/32	10.167.62.242 – 10.167.62.242	10.167.62.242
116	10.167.62.243/32	10.167.62.243 – 10.167.62.243	10.167.62.243
117	10.167.62.244/32	10.167.62.244 – 10.167.62.244	10.167.62.244
118	10.167.62.245/32	10.167.62.245 – 10.167.62.245	10.167.62.245
119	10.167.62.246/32	10.167.62.246 – 10.167.62.246	10.167.62.246
120	10.167.62.247/32	10.167.62.247 – 10.167.62.247	10.167.62.247
121	10.167.62.248/32	10.167.62.248 – 10.167.62.248	10.167.62.248
122	10.167.62.249/32	10.167.62.249 – 10.167.62.249	10.167.62.249
123	10.167.62.250/32	10.167.62.250 – 10.167.62.250	10.167.62.250
124	10.167.62.251/32	10.167.62.251 – 10.167.62.251	10.167.62.251
125	10.167.62.252/32	10.167.62.252 – 10.167.62.252	10.167.62.252
126	10.167.62.253/32	10.167.62.253 – 10.167.62.253	10.167.62.253
127	10.167.62.254/32	10.167.62.254 – 10.167.62.254	10.167.62.254
128	10.167.62.255/32	10.167.62.255 – 10.167.62.255	10.167.62.255

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 →