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)10.167.93.128/25

network10.167.93.128/25

broadcast10.167.93.255

first host10.167.93.129

last host10.167.93.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.93.128/25

address00001010.10100111.01011101.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01011101.10000000

broadcast00001010.10100111.01011101.11111111

green = network part, grey = host part

hex0x0aa75d80

decimal178740608

reverse dns128.93.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:5d80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.93.128/32	10.167.93.128 – 10.167.93.128	10.167.93.128
2	10.167.93.129/32	10.167.93.129 – 10.167.93.129	10.167.93.129
3	10.167.93.130/32	10.167.93.130 – 10.167.93.130	10.167.93.130
4	10.167.93.131/32	10.167.93.131 – 10.167.93.131	10.167.93.131
5	10.167.93.132/32	10.167.93.132 – 10.167.93.132	10.167.93.132
6	10.167.93.133/32	10.167.93.133 – 10.167.93.133	10.167.93.133
7	10.167.93.134/32	10.167.93.134 – 10.167.93.134	10.167.93.134
8	10.167.93.135/32	10.167.93.135 – 10.167.93.135	10.167.93.135
9	10.167.93.136/32	10.167.93.136 – 10.167.93.136	10.167.93.136
10	10.167.93.137/32	10.167.93.137 – 10.167.93.137	10.167.93.137
11	10.167.93.138/32	10.167.93.138 – 10.167.93.138	10.167.93.138
12	10.167.93.139/32	10.167.93.139 – 10.167.93.139	10.167.93.139
13	10.167.93.140/32	10.167.93.140 – 10.167.93.140	10.167.93.140
14	10.167.93.141/32	10.167.93.141 – 10.167.93.141	10.167.93.141
15	10.167.93.142/32	10.167.93.142 – 10.167.93.142	10.167.93.142
16	10.167.93.143/32	10.167.93.143 – 10.167.93.143	10.167.93.143
17	10.167.93.144/32	10.167.93.144 – 10.167.93.144	10.167.93.144
18	10.167.93.145/32	10.167.93.145 – 10.167.93.145	10.167.93.145
19	10.167.93.146/32	10.167.93.146 – 10.167.93.146	10.167.93.146
20	10.167.93.147/32	10.167.93.147 – 10.167.93.147	10.167.93.147
21	10.167.93.148/32	10.167.93.148 – 10.167.93.148	10.167.93.148
22	10.167.93.149/32	10.167.93.149 – 10.167.93.149	10.167.93.149
23	10.167.93.150/32	10.167.93.150 – 10.167.93.150	10.167.93.150
24	10.167.93.151/32	10.167.93.151 – 10.167.93.151	10.167.93.151
25	10.167.93.152/32	10.167.93.152 – 10.167.93.152	10.167.93.152
26	10.167.93.153/32	10.167.93.153 – 10.167.93.153	10.167.93.153
27	10.167.93.154/32	10.167.93.154 – 10.167.93.154	10.167.93.154
28	10.167.93.155/32	10.167.93.155 – 10.167.93.155	10.167.93.155
29	10.167.93.156/32	10.167.93.156 – 10.167.93.156	10.167.93.156
30	10.167.93.157/32	10.167.93.157 – 10.167.93.157	10.167.93.157
31	10.167.93.158/32	10.167.93.158 – 10.167.93.158	10.167.93.158
32	10.167.93.159/32	10.167.93.159 – 10.167.93.159	10.167.93.159
33	10.167.93.160/32	10.167.93.160 – 10.167.93.160	10.167.93.160
34	10.167.93.161/32	10.167.93.161 – 10.167.93.161	10.167.93.161
35	10.167.93.162/32	10.167.93.162 – 10.167.93.162	10.167.93.162
36	10.167.93.163/32	10.167.93.163 – 10.167.93.163	10.167.93.163
37	10.167.93.164/32	10.167.93.164 – 10.167.93.164	10.167.93.164
38	10.167.93.165/32	10.167.93.165 – 10.167.93.165	10.167.93.165
39	10.167.93.166/32	10.167.93.166 – 10.167.93.166	10.167.93.166
40	10.167.93.167/32	10.167.93.167 – 10.167.93.167	10.167.93.167
41	10.167.93.168/32	10.167.93.168 – 10.167.93.168	10.167.93.168
42	10.167.93.169/32	10.167.93.169 – 10.167.93.169	10.167.93.169
43	10.167.93.170/32	10.167.93.170 – 10.167.93.170	10.167.93.170
44	10.167.93.171/32	10.167.93.171 – 10.167.93.171	10.167.93.171
45	10.167.93.172/32	10.167.93.172 – 10.167.93.172	10.167.93.172
46	10.167.93.173/32	10.167.93.173 – 10.167.93.173	10.167.93.173
47	10.167.93.174/32	10.167.93.174 – 10.167.93.174	10.167.93.174
48	10.167.93.175/32	10.167.93.175 – 10.167.93.175	10.167.93.175
49	10.167.93.176/32	10.167.93.176 – 10.167.93.176	10.167.93.176
50	10.167.93.177/32	10.167.93.177 – 10.167.93.177	10.167.93.177
51	10.167.93.178/32	10.167.93.178 – 10.167.93.178	10.167.93.178
52	10.167.93.179/32	10.167.93.179 – 10.167.93.179	10.167.93.179
53	10.167.93.180/32	10.167.93.180 – 10.167.93.180	10.167.93.180
54	10.167.93.181/32	10.167.93.181 – 10.167.93.181	10.167.93.181
55	10.167.93.182/32	10.167.93.182 – 10.167.93.182	10.167.93.182
56	10.167.93.183/32	10.167.93.183 – 10.167.93.183	10.167.93.183
57	10.167.93.184/32	10.167.93.184 – 10.167.93.184	10.167.93.184
58	10.167.93.185/32	10.167.93.185 – 10.167.93.185	10.167.93.185
59	10.167.93.186/32	10.167.93.186 – 10.167.93.186	10.167.93.186
60	10.167.93.187/32	10.167.93.187 – 10.167.93.187	10.167.93.187
61	10.167.93.188/32	10.167.93.188 – 10.167.93.188	10.167.93.188
62	10.167.93.189/32	10.167.93.189 – 10.167.93.189	10.167.93.189
63	10.167.93.190/32	10.167.93.190 – 10.167.93.190	10.167.93.190
64	10.167.93.191/32	10.167.93.191 – 10.167.93.191	10.167.93.191
65	10.167.93.192/32	10.167.93.192 – 10.167.93.192	10.167.93.192
66	10.167.93.193/32	10.167.93.193 – 10.167.93.193	10.167.93.193
67	10.167.93.194/32	10.167.93.194 – 10.167.93.194	10.167.93.194
68	10.167.93.195/32	10.167.93.195 – 10.167.93.195	10.167.93.195
69	10.167.93.196/32	10.167.93.196 – 10.167.93.196	10.167.93.196
70	10.167.93.197/32	10.167.93.197 – 10.167.93.197	10.167.93.197
71	10.167.93.198/32	10.167.93.198 – 10.167.93.198	10.167.93.198
72	10.167.93.199/32	10.167.93.199 – 10.167.93.199	10.167.93.199
73	10.167.93.200/32	10.167.93.200 – 10.167.93.200	10.167.93.200
74	10.167.93.201/32	10.167.93.201 – 10.167.93.201	10.167.93.201
75	10.167.93.202/32	10.167.93.202 – 10.167.93.202	10.167.93.202
76	10.167.93.203/32	10.167.93.203 – 10.167.93.203	10.167.93.203
77	10.167.93.204/32	10.167.93.204 – 10.167.93.204	10.167.93.204
78	10.167.93.205/32	10.167.93.205 – 10.167.93.205	10.167.93.205
79	10.167.93.206/32	10.167.93.206 – 10.167.93.206	10.167.93.206
80	10.167.93.207/32	10.167.93.207 – 10.167.93.207	10.167.93.207
81	10.167.93.208/32	10.167.93.208 – 10.167.93.208	10.167.93.208
82	10.167.93.209/32	10.167.93.209 – 10.167.93.209	10.167.93.209
83	10.167.93.210/32	10.167.93.210 – 10.167.93.210	10.167.93.210
84	10.167.93.211/32	10.167.93.211 – 10.167.93.211	10.167.93.211
85	10.167.93.212/32	10.167.93.212 – 10.167.93.212	10.167.93.212
86	10.167.93.213/32	10.167.93.213 – 10.167.93.213	10.167.93.213
87	10.167.93.214/32	10.167.93.214 – 10.167.93.214	10.167.93.214
88	10.167.93.215/32	10.167.93.215 – 10.167.93.215	10.167.93.215
89	10.167.93.216/32	10.167.93.216 – 10.167.93.216	10.167.93.216
90	10.167.93.217/32	10.167.93.217 – 10.167.93.217	10.167.93.217
91	10.167.93.218/32	10.167.93.218 – 10.167.93.218	10.167.93.218
92	10.167.93.219/32	10.167.93.219 – 10.167.93.219	10.167.93.219
93	10.167.93.220/32	10.167.93.220 – 10.167.93.220	10.167.93.220
94	10.167.93.221/32	10.167.93.221 – 10.167.93.221	10.167.93.221
95	10.167.93.222/32	10.167.93.222 – 10.167.93.222	10.167.93.222
96	10.167.93.223/32	10.167.93.223 – 10.167.93.223	10.167.93.223
97	10.167.93.224/32	10.167.93.224 – 10.167.93.224	10.167.93.224
98	10.167.93.225/32	10.167.93.225 – 10.167.93.225	10.167.93.225
99	10.167.93.226/32	10.167.93.226 – 10.167.93.226	10.167.93.226
100	10.167.93.227/32	10.167.93.227 – 10.167.93.227	10.167.93.227
101	10.167.93.228/32	10.167.93.228 – 10.167.93.228	10.167.93.228
102	10.167.93.229/32	10.167.93.229 – 10.167.93.229	10.167.93.229
103	10.167.93.230/32	10.167.93.230 – 10.167.93.230	10.167.93.230
104	10.167.93.231/32	10.167.93.231 – 10.167.93.231	10.167.93.231
105	10.167.93.232/32	10.167.93.232 – 10.167.93.232	10.167.93.232
106	10.167.93.233/32	10.167.93.233 – 10.167.93.233	10.167.93.233
107	10.167.93.234/32	10.167.93.234 – 10.167.93.234	10.167.93.234
108	10.167.93.235/32	10.167.93.235 – 10.167.93.235	10.167.93.235
109	10.167.93.236/32	10.167.93.236 – 10.167.93.236	10.167.93.236
110	10.167.93.237/32	10.167.93.237 – 10.167.93.237	10.167.93.237
111	10.167.93.238/32	10.167.93.238 – 10.167.93.238	10.167.93.238
112	10.167.93.239/32	10.167.93.239 – 10.167.93.239	10.167.93.239
113	10.167.93.240/32	10.167.93.240 – 10.167.93.240	10.167.93.240
114	10.167.93.241/32	10.167.93.241 – 10.167.93.241	10.167.93.241
115	10.167.93.242/32	10.167.93.242 – 10.167.93.242	10.167.93.242
116	10.167.93.243/32	10.167.93.243 – 10.167.93.243	10.167.93.243
117	10.167.93.244/32	10.167.93.244 – 10.167.93.244	10.167.93.244
118	10.167.93.245/32	10.167.93.245 – 10.167.93.245	10.167.93.245
119	10.167.93.246/32	10.167.93.246 – 10.167.93.246	10.167.93.246
120	10.167.93.247/32	10.167.93.247 – 10.167.93.247	10.167.93.247
121	10.167.93.248/32	10.167.93.248 – 10.167.93.248	10.167.93.248
122	10.167.93.249/32	10.167.93.249 – 10.167.93.249	10.167.93.249
123	10.167.93.250/32	10.167.93.250 – 10.167.93.250	10.167.93.250
124	10.167.93.251/32	10.167.93.251 – 10.167.93.251	10.167.93.251
125	10.167.93.252/32	10.167.93.252 – 10.167.93.252	10.167.93.252
126	10.167.93.253/32	10.167.93.253 – 10.167.93.253	10.167.93.253
127	10.167.93.254/32	10.167.93.254 – 10.167.93.254	10.167.93.254
128	10.167.93.255/32	10.167.93.255 – 10.167.93.255	10.167.93.255

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 →