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)10.167.88.128/25

network10.167.88.128/25

broadcast10.167.88.255

first host10.167.88.129

last host10.167.88.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.88.128/25

address00001010.10100111.01011000.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01011000.10000000

broadcast00001010.10100111.01011000.11111111

green = network part, grey = host part

hex0x0aa75880

decimal178739328

reverse dns128.88.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:5880

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.88.128/32	10.167.88.128 – 10.167.88.128	10.167.88.128
2	10.167.88.129/32	10.167.88.129 – 10.167.88.129	10.167.88.129
3	10.167.88.130/32	10.167.88.130 – 10.167.88.130	10.167.88.130
4	10.167.88.131/32	10.167.88.131 – 10.167.88.131	10.167.88.131
5	10.167.88.132/32	10.167.88.132 – 10.167.88.132	10.167.88.132
6	10.167.88.133/32	10.167.88.133 – 10.167.88.133	10.167.88.133
7	10.167.88.134/32	10.167.88.134 – 10.167.88.134	10.167.88.134
8	10.167.88.135/32	10.167.88.135 – 10.167.88.135	10.167.88.135
9	10.167.88.136/32	10.167.88.136 – 10.167.88.136	10.167.88.136
10	10.167.88.137/32	10.167.88.137 – 10.167.88.137	10.167.88.137
11	10.167.88.138/32	10.167.88.138 – 10.167.88.138	10.167.88.138
12	10.167.88.139/32	10.167.88.139 – 10.167.88.139	10.167.88.139
13	10.167.88.140/32	10.167.88.140 – 10.167.88.140	10.167.88.140
14	10.167.88.141/32	10.167.88.141 – 10.167.88.141	10.167.88.141
15	10.167.88.142/32	10.167.88.142 – 10.167.88.142	10.167.88.142
16	10.167.88.143/32	10.167.88.143 – 10.167.88.143	10.167.88.143
17	10.167.88.144/32	10.167.88.144 – 10.167.88.144	10.167.88.144
18	10.167.88.145/32	10.167.88.145 – 10.167.88.145	10.167.88.145
19	10.167.88.146/32	10.167.88.146 – 10.167.88.146	10.167.88.146
20	10.167.88.147/32	10.167.88.147 – 10.167.88.147	10.167.88.147
21	10.167.88.148/32	10.167.88.148 – 10.167.88.148	10.167.88.148
22	10.167.88.149/32	10.167.88.149 – 10.167.88.149	10.167.88.149
23	10.167.88.150/32	10.167.88.150 – 10.167.88.150	10.167.88.150
24	10.167.88.151/32	10.167.88.151 – 10.167.88.151	10.167.88.151
25	10.167.88.152/32	10.167.88.152 – 10.167.88.152	10.167.88.152
26	10.167.88.153/32	10.167.88.153 – 10.167.88.153	10.167.88.153
27	10.167.88.154/32	10.167.88.154 – 10.167.88.154	10.167.88.154
28	10.167.88.155/32	10.167.88.155 – 10.167.88.155	10.167.88.155
29	10.167.88.156/32	10.167.88.156 – 10.167.88.156	10.167.88.156
30	10.167.88.157/32	10.167.88.157 – 10.167.88.157	10.167.88.157
31	10.167.88.158/32	10.167.88.158 – 10.167.88.158	10.167.88.158
32	10.167.88.159/32	10.167.88.159 – 10.167.88.159	10.167.88.159
33	10.167.88.160/32	10.167.88.160 – 10.167.88.160	10.167.88.160
34	10.167.88.161/32	10.167.88.161 – 10.167.88.161	10.167.88.161
35	10.167.88.162/32	10.167.88.162 – 10.167.88.162	10.167.88.162
36	10.167.88.163/32	10.167.88.163 – 10.167.88.163	10.167.88.163
37	10.167.88.164/32	10.167.88.164 – 10.167.88.164	10.167.88.164
38	10.167.88.165/32	10.167.88.165 – 10.167.88.165	10.167.88.165
39	10.167.88.166/32	10.167.88.166 – 10.167.88.166	10.167.88.166
40	10.167.88.167/32	10.167.88.167 – 10.167.88.167	10.167.88.167
41	10.167.88.168/32	10.167.88.168 – 10.167.88.168	10.167.88.168
42	10.167.88.169/32	10.167.88.169 – 10.167.88.169	10.167.88.169
43	10.167.88.170/32	10.167.88.170 – 10.167.88.170	10.167.88.170
44	10.167.88.171/32	10.167.88.171 – 10.167.88.171	10.167.88.171
45	10.167.88.172/32	10.167.88.172 – 10.167.88.172	10.167.88.172
46	10.167.88.173/32	10.167.88.173 – 10.167.88.173	10.167.88.173
47	10.167.88.174/32	10.167.88.174 – 10.167.88.174	10.167.88.174
48	10.167.88.175/32	10.167.88.175 – 10.167.88.175	10.167.88.175
49	10.167.88.176/32	10.167.88.176 – 10.167.88.176	10.167.88.176
50	10.167.88.177/32	10.167.88.177 – 10.167.88.177	10.167.88.177
51	10.167.88.178/32	10.167.88.178 – 10.167.88.178	10.167.88.178
52	10.167.88.179/32	10.167.88.179 – 10.167.88.179	10.167.88.179
53	10.167.88.180/32	10.167.88.180 – 10.167.88.180	10.167.88.180
54	10.167.88.181/32	10.167.88.181 – 10.167.88.181	10.167.88.181
55	10.167.88.182/32	10.167.88.182 – 10.167.88.182	10.167.88.182
56	10.167.88.183/32	10.167.88.183 – 10.167.88.183	10.167.88.183
57	10.167.88.184/32	10.167.88.184 – 10.167.88.184	10.167.88.184
58	10.167.88.185/32	10.167.88.185 – 10.167.88.185	10.167.88.185
59	10.167.88.186/32	10.167.88.186 – 10.167.88.186	10.167.88.186
60	10.167.88.187/32	10.167.88.187 – 10.167.88.187	10.167.88.187
61	10.167.88.188/32	10.167.88.188 – 10.167.88.188	10.167.88.188
62	10.167.88.189/32	10.167.88.189 – 10.167.88.189	10.167.88.189
63	10.167.88.190/32	10.167.88.190 – 10.167.88.190	10.167.88.190
64	10.167.88.191/32	10.167.88.191 – 10.167.88.191	10.167.88.191
65	10.167.88.192/32	10.167.88.192 – 10.167.88.192	10.167.88.192
66	10.167.88.193/32	10.167.88.193 – 10.167.88.193	10.167.88.193
67	10.167.88.194/32	10.167.88.194 – 10.167.88.194	10.167.88.194
68	10.167.88.195/32	10.167.88.195 – 10.167.88.195	10.167.88.195
69	10.167.88.196/32	10.167.88.196 – 10.167.88.196	10.167.88.196
70	10.167.88.197/32	10.167.88.197 – 10.167.88.197	10.167.88.197
71	10.167.88.198/32	10.167.88.198 – 10.167.88.198	10.167.88.198
72	10.167.88.199/32	10.167.88.199 – 10.167.88.199	10.167.88.199
73	10.167.88.200/32	10.167.88.200 – 10.167.88.200	10.167.88.200
74	10.167.88.201/32	10.167.88.201 – 10.167.88.201	10.167.88.201
75	10.167.88.202/32	10.167.88.202 – 10.167.88.202	10.167.88.202
76	10.167.88.203/32	10.167.88.203 – 10.167.88.203	10.167.88.203
77	10.167.88.204/32	10.167.88.204 – 10.167.88.204	10.167.88.204
78	10.167.88.205/32	10.167.88.205 – 10.167.88.205	10.167.88.205
79	10.167.88.206/32	10.167.88.206 – 10.167.88.206	10.167.88.206
80	10.167.88.207/32	10.167.88.207 – 10.167.88.207	10.167.88.207
81	10.167.88.208/32	10.167.88.208 – 10.167.88.208	10.167.88.208
82	10.167.88.209/32	10.167.88.209 – 10.167.88.209	10.167.88.209
83	10.167.88.210/32	10.167.88.210 – 10.167.88.210	10.167.88.210
84	10.167.88.211/32	10.167.88.211 – 10.167.88.211	10.167.88.211
85	10.167.88.212/32	10.167.88.212 – 10.167.88.212	10.167.88.212
86	10.167.88.213/32	10.167.88.213 – 10.167.88.213	10.167.88.213
87	10.167.88.214/32	10.167.88.214 – 10.167.88.214	10.167.88.214
88	10.167.88.215/32	10.167.88.215 – 10.167.88.215	10.167.88.215
89	10.167.88.216/32	10.167.88.216 – 10.167.88.216	10.167.88.216
90	10.167.88.217/32	10.167.88.217 – 10.167.88.217	10.167.88.217
91	10.167.88.218/32	10.167.88.218 – 10.167.88.218	10.167.88.218
92	10.167.88.219/32	10.167.88.219 – 10.167.88.219	10.167.88.219
93	10.167.88.220/32	10.167.88.220 – 10.167.88.220	10.167.88.220
94	10.167.88.221/32	10.167.88.221 – 10.167.88.221	10.167.88.221
95	10.167.88.222/32	10.167.88.222 – 10.167.88.222	10.167.88.222
96	10.167.88.223/32	10.167.88.223 – 10.167.88.223	10.167.88.223
97	10.167.88.224/32	10.167.88.224 – 10.167.88.224	10.167.88.224
98	10.167.88.225/32	10.167.88.225 – 10.167.88.225	10.167.88.225
99	10.167.88.226/32	10.167.88.226 – 10.167.88.226	10.167.88.226
100	10.167.88.227/32	10.167.88.227 – 10.167.88.227	10.167.88.227
101	10.167.88.228/32	10.167.88.228 – 10.167.88.228	10.167.88.228
102	10.167.88.229/32	10.167.88.229 – 10.167.88.229	10.167.88.229
103	10.167.88.230/32	10.167.88.230 – 10.167.88.230	10.167.88.230
104	10.167.88.231/32	10.167.88.231 – 10.167.88.231	10.167.88.231
105	10.167.88.232/32	10.167.88.232 – 10.167.88.232	10.167.88.232
106	10.167.88.233/32	10.167.88.233 – 10.167.88.233	10.167.88.233
107	10.167.88.234/32	10.167.88.234 – 10.167.88.234	10.167.88.234
108	10.167.88.235/32	10.167.88.235 – 10.167.88.235	10.167.88.235
109	10.167.88.236/32	10.167.88.236 – 10.167.88.236	10.167.88.236
110	10.167.88.237/32	10.167.88.237 – 10.167.88.237	10.167.88.237
111	10.167.88.238/32	10.167.88.238 – 10.167.88.238	10.167.88.238
112	10.167.88.239/32	10.167.88.239 – 10.167.88.239	10.167.88.239
113	10.167.88.240/32	10.167.88.240 – 10.167.88.240	10.167.88.240
114	10.167.88.241/32	10.167.88.241 – 10.167.88.241	10.167.88.241
115	10.167.88.242/32	10.167.88.242 – 10.167.88.242	10.167.88.242
116	10.167.88.243/32	10.167.88.243 – 10.167.88.243	10.167.88.243
117	10.167.88.244/32	10.167.88.244 – 10.167.88.244	10.167.88.244
118	10.167.88.245/32	10.167.88.245 – 10.167.88.245	10.167.88.245
119	10.167.88.246/32	10.167.88.246 – 10.167.88.246	10.167.88.246
120	10.167.88.247/32	10.167.88.247 – 10.167.88.247	10.167.88.247
121	10.167.88.248/32	10.167.88.248 – 10.167.88.248	10.167.88.248
122	10.167.88.249/32	10.167.88.249 – 10.167.88.249	10.167.88.249
123	10.167.88.250/32	10.167.88.250 – 10.167.88.250	10.167.88.250
124	10.167.88.251/32	10.167.88.251 – 10.167.88.251	10.167.88.251
125	10.167.88.252/32	10.167.88.252 – 10.167.88.252	10.167.88.252
126	10.167.88.253/32	10.167.88.253 – 10.167.88.253	10.167.88.253
127	10.167.88.254/32	10.167.88.254 – 10.167.88.254	10.167.88.254
128	10.167.88.255/32	10.167.88.255 – 10.167.88.255	10.167.88.255

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 →