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)10.167.141.128/25

network10.167.141.128/25

broadcast10.167.141.255

first host10.167.141.129

last host10.167.141.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.141.128/25

address00001010.10100111.10001101.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10001101.10000000

broadcast00001010.10100111.10001101.11111111

green = network part, grey = host part

hex0x0aa78d80

decimal178752896

reverse dns128.141.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:8d80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.141.128/32	10.167.141.128 – 10.167.141.128	10.167.141.128
2	10.167.141.129/32	10.167.141.129 – 10.167.141.129	10.167.141.129
3	10.167.141.130/32	10.167.141.130 – 10.167.141.130	10.167.141.130
4	10.167.141.131/32	10.167.141.131 – 10.167.141.131	10.167.141.131
5	10.167.141.132/32	10.167.141.132 – 10.167.141.132	10.167.141.132
6	10.167.141.133/32	10.167.141.133 – 10.167.141.133	10.167.141.133
7	10.167.141.134/32	10.167.141.134 – 10.167.141.134	10.167.141.134
8	10.167.141.135/32	10.167.141.135 – 10.167.141.135	10.167.141.135
9	10.167.141.136/32	10.167.141.136 – 10.167.141.136	10.167.141.136
10	10.167.141.137/32	10.167.141.137 – 10.167.141.137	10.167.141.137
11	10.167.141.138/32	10.167.141.138 – 10.167.141.138	10.167.141.138
12	10.167.141.139/32	10.167.141.139 – 10.167.141.139	10.167.141.139
13	10.167.141.140/32	10.167.141.140 – 10.167.141.140	10.167.141.140
14	10.167.141.141/32	10.167.141.141 – 10.167.141.141	10.167.141.141
15	10.167.141.142/32	10.167.141.142 – 10.167.141.142	10.167.141.142
16	10.167.141.143/32	10.167.141.143 – 10.167.141.143	10.167.141.143
17	10.167.141.144/32	10.167.141.144 – 10.167.141.144	10.167.141.144
18	10.167.141.145/32	10.167.141.145 – 10.167.141.145	10.167.141.145
19	10.167.141.146/32	10.167.141.146 – 10.167.141.146	10.167.141.146
20	10.167.141.147/32	10.167.141.147 – 10.167.141.147	10.167.141.147
21	10.167.141.148/32	10.167.141.148 – 10.167.141.148	10.167.141.148
22	10.167.141.149/32	10.167.141.149 – 10.167.141.149	10.167.141.149
23	10.167.141.150/32	10.167.141.150 – 10.167.141.150	10.167.141.150
24	10.167.141.151/32	10.167.141.151 – 10.167.141.151	10.167.141.151
25	10.167.141.152/32	10.167.141.152 – 10.167.141.152	10.167.141.152
26	10.167.141.153/32	10.167.141.153 – 10.167.141.153	10.167.141.153
27	10.167.141.154/32	10.167.141.154 – 10.167.141.154	10.167.141.154
28	10.167.141.155/32	10.167.141.155 – 10.167.141.155	10.167.141.155
29	10.167.141.156/32	10.167.141.156 – 10.167.141.156	10.167.141.156
30	10.167.141.157/32	10.167.141.157 – 10.167.141.157	10.167.141.157
31	10.167.141.158/32	10.167.141.158 – 10.167.141.158	10.167.141.158
32	10.167.141.159/32	10.167.141.159 – 10.167.141.159	10.167.141.159
33	10.167.141.160/32	10.167.141.160 – 10.167.141.160	10.167.141.160
34	10.167.141.161/32	10.167.141.161 – 10.167.141.161	10.167.141.161
35	10.167.141.162/32	10.167.141.162 – 10.167.141.162	10.167.141.162
36	10.167.141.163/32	10.167.141.163 – 10.167.141.163	10.167.141.163
37	10.167.141.164/32	10.167.141.164 – 10.167.141.164	10.167.141.164
38	10.167.141.165/32	10.167.141.165 – 10.167.141.165	10.167.141.165
39	10.167.141.166/32	10.167.141.166 – 10.167.141.166	10.167.141.166
40	10.167.141.167/32	10.167.141.167 – 10.167.141.167	10.167.141.167
41	10.167.141.168/32	10.167.141.168 – 10.167.141.168	10.167.141.168
42	10.167.141.169/32	10.167.141.169 – 10.167.141.169	10.167.141.169
43	10.167.141.170/32	10.167.141.170 – 10.167.141.170	10.167.141.170
44	10.167.141.171/32	10.167.141.171 – 10.167.141.171	10.167.141.171
45	10.167.141.172/32	10.167.141.172 – 10.167.141.172	10.167.141.172
46	10.167.141.173/32	10.167.141.173 – 10.167.141.173	10.167.141.173
47	10.167.141.174/32	10.167.141.174 – 10.167.141.174	10.167.141.174
48	10.167.141.175/32	10.167.141.175 – 10.167.141.175	10.167.141.175
49	10.167.141.176/32	10.167.141.176 – 10.167.141.176	10.167.141.176
50	10.167.141.177/32	10.167.141.177 – 10.167.141.177	10.167.141.177
51	10.167.141.178/32	10.167.141.178 – 10.167.141.178	10.167.141.178
52	10.167.141.179/32	10.167.141.179 – 10.167.141.179	10.167.141.179
53	10.167.141.180/32	10.167.141.180 – 10.167.141.180	10.167.141.180
54	10.167.141.181/32	10.167.141.181 – 10.167.141.181	10.167.141.181
55	10.167.141.182/32	10.167.141.182 – 10.167.141.182	10.167.141.182
56	10.167.141.183/32	10.167.141.183 – 10.167.141.183	10.167.141.183
57	10.167.141.184/32	10.167.141.184 – 10.167.141.184	10.167.141.184
58	10.167.141.185/32	10.167.141.185 – 10.167.141.185	10.167.141.185
59	10.167.141.186/32	10.167.141.186 – 10.167.141.186	10.167.141.186
60	10.167.141.187/32	10.167.141.187 – 10.167.141.187	10.167.141.187
61	10.167.141.188/32	10.167.141.188 – 10.167.141.188	10.167.141.188
62	10.167.141.189/32	10.167.141.189 – 10.167.141.189	10.167.141.189
63	10.167.141.190/32	10.167.141.190 – 10.167.141.190	10.167.141.190
64	10.167.141.191/32	10.167.141.191 – 10.167.141.191	10.167.141.191
65	10.167.141.192/32	10.167.141.192 – 10.167.141.192	10.167.141.192
66	10.167.141.193/32	10.167.141.193 – 10.167.141.193	10.167.141.193
67	10.167.141.194/32	10.167.141.194 – 10.167.141.194	10.167.141.194
68	10.167.141.195/32	10.167.141.195 – 10.167.141.195	10.167.141.195
69	10.167.141.196/32	10.167.141.196 – 10.167.141.196	10.167.141.196
70	10.167.141.197/32	10.167.141.197 – 10.167.141.197	10.167.141.197
71	10.167.141.198/32	10.167.141.198 – 10.167.141.198	10.167.141.198
72	10.167.141.199/32	10.167.141.199 – 10.167.141.199	10.167.141.199
73	10.167.141.200/32	10.167.141.200 – 10.167.141.200	10.167.141.200
74	10.167.141.201/32	10.167.141.201 – 10.167.141.201	10.167.141.201
75	10.167.141.202/32	10.167.141.202 – 10.167.141.202	10.167.141.202
76	10.167.141.203/32	10.167.141.203 – 10.167.141.203	10.167.141.203
77	10.167.141.204/32	10.167.141.204 – 10.167.141.204	10.167.141.204
78	10.167.141.205/32	10.167.141.205 – 10.167.141.205	10.167.141.205
79	10.167.141.206/32	10.167.141.206 – 10.167.141.206	10.167.141.206
80	10.167.141.207/32	10.167.141.207 – 10.167.141.207	10.167.141.207
81	10.167.141.208/32	10.167.141.208 – 10.167.141.208	10.167.141.208
82	10.167.141.209/32	10.167.141.209 – 10.167.141.209	10.167.141.209
83	10.167.141.210/32	10.167.141.210 – 10.167.141.210	10.167.141.210
84	10.167.141.211/32	10.167.141.211 – 10.167.141.211	10.167.141.211
85	10.167.141.212/32	10.167.141.212 – 10.167.141.212	10.167.141.212
86	10.167.141.213/32	10.167.141.213 – 10.167.141.213	10.167.141.213
87	10.167.141.214/32	10.167.141.214 – 10.167.141.214	10.167.141.214
88	10.167.141.215/32	10.167.141.215 – 10.167.141.215	10.167.141.215
89	10.167.141.216/32	10.167.141.216 – 10.167.141.216	10.167.141.216
90	10.167.141.217/32	10.167.141.217 – 10.167.141.217	10.167.141.217
91	10.167.141.218/32	10.167.141.218 – 10.167.141.218	10.167.141.218
92	10.167.141.219/32	10.167.141.219 – 10.167.141.219	10.167.141.219
93	10.167.141.220/32	10.167.141.220 – 10.167.141.220	10.167.141.220
94	10.167.141.221/32	10.167.141.221 – 10.167.141.221	10.167.141.221
95	10.167.141.222/32	10.167.141.222 – 10.167.141.222	10.167.141.222
96	10.167.141.223/32	10.167.141.223 – 10.167.141.223	10.167.141.223
97	10.167.141.224/32	10.167.141.224 – 10.167.141.224	10.167.141.224
98	10.167.141.225/32	10.167.141.225 – 10.167.141.225	10.167.141.225
99	10.167.141.226/32	10.167.141.226 – 10.167.141.226	10.167.141.226
100	10.167.141.227/32	10.167.141.227 – 10.167.141.227	10.167.141.227
101	10.167.141.228/32	10.167.141.228 – 10.167.141.228	10.167.141.228
102	10.167.141.229/32	10.167.141.229 – 10.167.141.229	10.167.141.229
103	10.167.141.230/32	10.167.141.230 – 10.167.141.230	10.167.141.230
104	10.167.141.231/32	10.167.141.231 – 10.167.141.231	10.167.141.231
105	10.167.141.232/32	10.167.141.232 – 10.167.141.232	10.167.141.232
106	10.167.141.233/32	10.167.141.233 – 10.167.141.233	10.167.141.233
107	10.167.141.234/32	10.167.141.234 – 10.167.141.234	10.167.141.234
108	10.167.141.235/32	10.167.141.235 – 10.167.141.235	10.167.141.235
109	10.167.141.236/32	10.167.141.236 – 10.167.141.236	10.167.141.236
110	10.167.141.237/32	10.167.141.237 – 10.167.141.237	10.167.141.237
111	10.167.141.238/32	10.167.141.238 – 10.167.141.238	10.167.141.238
112	10.167.141.239/32	10.167.141.239 – 10.167.141.239	10.167.141.239
113	10.167.141.240/32	10.167.141.240 – 10.167.141.240	10.167.141.240
114	10.167.141.241/32	10.167.141.241 – 10.167.141.241	10.167.141.241
115	10.167.141.242/32	10.167.141.242 – 10.167.141.242	10.167.141.242
116	10.167.141.243/32	10.167.141.243 – 10.167.141.243	10.167.141.243
117	10.167.141.244/32	10.167.141.244 – 10.167.141.244	10.167.141.244
118	10.167.141.245/32	10.167.141.245 – 10.167.141.245	10.167.141.245
119	10.167.141.246/32	10.167.141.246 – 10.167.141.246	10.167.141.246
120	10.167.141.247/32	10.167.141.247 – 10.167.141.247	10.167.141.247
121	10.167.141.248/32	10.167.141.248 – 10.167.141.248	10.167.141.248
122	10.167.141.249/32	10.167.141.249 – 10.167.141.249	10.167.141.249
123	10.167.141.250/32	10.167.141.250 – 10.167.141.250	10.167.141.250
124	10.167.141.251/32	10.167.141.251 – 10.167.141.251	10.167.141.251
125	10.167.141.252/32	10.167.141.252 – 10.167.141.252	10.167.141.252
126	10.167.141.253/32	10.167.141.253 – 10.167.141.253	10.167.141.253
127	10.167.141.254/32	10.167.141.254 – 10.167.141.254	10.167.141.254
128	10.167.141.255/32	10.167.141.255 – 10.167.141.255	10.167.141.255

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 →