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)10.167.69.128/25

network10.167.69.128/25

broadcast10.167.69.255

first host10.167.69.129

last host10.167.69.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.69.128/25

address00001010.10100111.01000101.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01000101.10000000

broadcast00001010.10100111.01000101.11111111

green = network part, grey = host part

hex0x0aa74580

decimal178734464

reverse dns128.69.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:4580

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.69.128/32	10.167.69.128 – 10.167.69.128	10.167.69.128
2	10.167.69.129/32	10.167.69.129 – 10.167.69.129	10.167.69.129
3	10.167.69.130/32	10.167.69.130 – 10.167.69.130	10.167.69.130
4	10.167.69.131/32	10.167.69.131 – 10.167.69.131	10.167.69.131
5	10.167.69.132/32	10.167.69.132 – 10.167.69.132	10.167.69.132
6	10.167.69.133/32	10.167.69.133 – 10.167.69.133	10.167.69.133
7	10.167.69.134/32	10.167.69.134 – 10.167.69.134	10.167.69.134
8	10.167.69.135/32	10.167.69.135 – 10.167.69.135	10.167.69.135
9	10.167.69.136/32	10.167.69.136 – 10.167.69.136	10.167.69.136
10	10.167.69.137/32	10.167.69.137 – 10.167.69.137	10.167.69.137
11	10.167.69.138/32	10.167.69.138 – 10.167.69.138	10.167.69.138
12	10.167.69.139/32	10.167.69.139 – 10.167.69.139	10.167.69.139
13	10.167.69.140/32	10.167.69.140 – 10.167.69.140	10.167.69.140
14	10.167.69.141/32	10.167.69.141 – 10.167.69.141	10.167.69.141
15	10.167.69.142/32	10.167.69.142 – 10.167.69.142	10.167.69.142
16	10.167.69.143/32	10.167.69.143 – 10.167.69.143	10.167.69.143
17	10.167.69.144/32	10.167.69.144 – 10.167.69.144	10.167.69.144
18	10.167.69.145/32	10.167.69.145 – 10.167.69.145	10.167.69.145
19	10.167.69.146/32	10.167.69.146 – 10.167.69.146	10.167.69.146
20	10.167.69.147/32	10.167.69.147 – 10.167.69.147	10.167.69.147
21	10.167.69.148/32	10.167.69.148 – 10.167.69.148	10.167.69.148
22	10.167.69.149/32	10.167.69.149 – 10.167.69.149	10.167.69.149
23	10.167.69.150/32	10.167.69.150 – 10.167.69.150	10.167.69.150
24	10.167.69.151/32	10.167.69.151 – 10.167.69.151	10.167.69.151
25	10.167.69.152/32	10.167.69.152 – 10.167.69.152	10.167.69.152
26	10.167.69.153/32	10.167.69.153 – 10.167.69.153	10.167.69.153
27	10.167.69.154/32	10.167.69.154 – 10.167.69.154	10.167.69.154
28	10.167.69.155/32	10.167.69.155 – 10.167.69.155	10.167.69.155
29	10.167.69.156/32	10.167.69.156 – 10.167.69.156	10.167.69.156
30	10.167.69.157/32	10.167.69.157 – 10.167.69.157	10.167.69.157
31	10.167.69.158/32	10.167.69.158 – 10.167.69.158	10.167.69.158
32	10.167.69.159/32	10.167.69.159 – 10.167.69.159	10.167.69.159
33	10.167.69.160/32	10.167.69.160 – 10.167.69.160	10.167.69.160
34	10.167.69.161/32	10.167.69.161 – 10.167.69.161	10.167.69.161
35	10.167.69.162/32	10.167.69.162 – 10.167.69.162	10.167.69.162
36	10.167.69.163/32	10.167.69.163 – 10.167.69.163	10.167.69.163
37	10.167.69.164/32	10.167.69.164 – 10.167.69.164	10.167.69.164
38	10.167.69.165/32	10.167.69.165 – 10.167.69.165	10.167.69.165
39	10.167.69.166/32	10.167.69.166 – 10.167.69.166	10.167.69.166
40	10.167.69.167/32	10.167.69.167 – 10.167.69.167	10.167.69.167
41	10.167.69.168/32	10.167.69.168 – 10.167.69.168	10.167.69.168
42	10.167.69.169/32	10.167.69.169 – 10.167.69.169	10.167.69.169
43	10.167.69.170/32	10.167.69.170 – 10.167.69.170	10.167.69.170
44	10.167.69.171/32	10.167.69.171 – 10.167.69.171	10.167.69.171
45	10.167.69.172/32	10.167.69.172 – 10.167.69.172	10.167.69.172
46	10.167.69.173/32	10.167.69.173 – 10.167.69.173	10.167.69.173
47	10.167.69.174/32	10.167.69.174 – 10.167.69.174	10.167.69.174
48	10.167.69.175/32	10.167.69.175 – 10.167.69.175	10.167.69.175
49	10.167.69.176/32	10.167.69.176 – 10.167.69.176	10.167.69.176
50	10.167.69.177/32	10.167.69.177 – 10.167.69.177	10.167.69.177
51	10.167.69.178/32	10.167.69.178 – 10.167.69.178	10.167.69.178
52	10.167.69.179/32	10.167.69.179 – 10.167.69.179	10.167.69.179
53	10.167.69.180/32	10.167.69.180 – 10.167.69.180	10.167.69.180
54	10.167.69.181/32	10.167.69.181 – 10.167.69.181	10.167.69.181
55	10.167.69.182/32	10.167.69.182 – 10.167.69.182	10.167.69.182
56	10.167.69.183/32	10.167.69.183 – 10.167.69.183	10.167.69.183
57	10.167.69.184/32	10.167.69.184 – 10.167.69.184	10.167.69.184
58	10.167.69.185/32	10.167.69.185 – 10.167.69.185	10.167.69.185
59	10.167.69.186/32	10.167.69.186 – 10.167.69.186	10.167.69.186
60	10.167.69.187/32	10.167.69.187 – 10.167.69.187	10.167.69.187
61	10.167.69.188/32	10.167.69.188 – 10.167.69.188	10.167.69.188
62	10.167.69.189/32	10.167.69.189 – 10.167.69.189	10.167.69.189
63	10.167.69.190/32	10.167.69.190 – 10.167.69.190	10.167.69.190
64	10.167.69.191/32	10.167.69.191 – 10.167.69.191	10.167.69.191
65	10.167.69.192/32	10.167.69.192 – 10.167.69.192	10.167.69.192
66	10.167.69.193/32	10.167.69.193 – 10.167.69.193	10.167.69.193
67	10.167.69.194/32	10.167.69.194 – 10.167.69.194	10.167.69.194
68	10.167.69.195/32	10.167.69.195 – 10.167.69.195	10.167.69.195
69	10.167.69.196/32	10.167.69.196 – 10.167.69.196	10.167.69.196
70	10.167.69.197/32	10.167.69.197 – 10.167.69.197	10.167.69.197
71	10.167.69.198/32	10.167.69.198 – 10.167.69.198	10.167.69.198
72	10.167.69.199/32	10.167.69.199 – 10.167.69.199	10.167.69.199
73	10.167.69.200/32	10.167.69.200 – 10.167.69.200	10.167.69.200
74	10.167.69.201/32	10.167.69.201 – 10.167.69.201	10.167.69.201
75	10.167.69.202/32	10.167.69.202 – 10.167.69.202	10.167.69.202
76	10.167.69.203/32	10.167.69.203 – 10.167.69.203	10.167.69.203
77	10.167.69.204/32	10.167.69.204 – 10.167.69.204	10.167.69.204
78	10.167.69.205/32	10.167.69.205 – 10.167.69.205	10.167.69.205
79	10.167.69.206/32	10.167.69.206 – 10.167.69.206	10.167.69.206
80	10.167.69.207/32	10.167.69.207 – 10.167.69.207	10.167.69.207
81	10.167.69.208/32	10.167.69.208 – 10.167.69.208	10.167.69.208
82	10.167.69.209/32	10.167.69.209 – 10.167.69.209	10.167.69.209
83	10.167.69.210/32	10.167.69.210 – 10.167.69.210	10.167.69.210
84	10.167.69.211/32	10.167.69.211 – 10.167.69.211	10.167.69.211
85	10.167.69.212/32	10.167.69.212 – 10.167.69.212	10.167.69.212
86	10.167.69.213/32	10.167.69.213 – 10.167.69.213	10.167.69.213
87	10.167.69.214/32	10.167.69.214 – 10.167.69.214	10.167.69.214
88	10.167.69.215/32	10.167.69.215 – 10.167.69.215	10.167.69.215
89	10.167.69.216/32	10.167.69.216 – 10.167.69.216	10.167.69.216
90	10.167.69.217/32	10.167.69.217 – 10.167.69.217	10.167.69.217
91	10.167.69.218/32	10.167.69.218 – 10.167.69.218	10.167.69.218
92	10.167.69.219/32	10.167.69.219 – 10.167.69.219	10.167.69.219
93	10.167.69.220/32	10.167.69.220 – 10.167.69.220	10.167.69.220
94	10.167.69.221/32	10.167.69.221 – 10.167.69.221	10.167.69.221
95	10.167.69.222/32	10.167.69.222 – 10.167.69.222	10.167.69.222
96	10.167.69.223/32	10.167.69.223 – 10.167.69.223	10.167.69.223
97	10.167.69.224/32	10.167.69.224 – 10.167.69.224	10.167.69.224
98	10.167.69.225/32	10.167.69.225 – 10.167.69.225	10.167.69.225
99	10.167.69.226/32	10.167.69.226 – 10.167.69.226	10.167.69.226
100	10.167.69.227/32	10.167.69.227 – 10.167.69.227	10.167.69.227
101	10.167.69.228/32	10.167.69.228 – 10.167.69.228	10.167.69.228
102	10.167.69.229/32	10.167.69.229 – 10.167.69.229	10.167.69.229
103	10.167.69.230/32	10.167.69.230 – 10.167.69.230	10.167.69.230
104	10.167.69.231/32	10.167.69.231 – 10.167.69.231	10.167.69.231
105	10.167.69.232/32	10.167.69.232 – 10.167.69.232	10.167.69.232
106	10.167.69.233/32	10.167.69.233 – 10.167.69.233	10.167.69.233
107	10.167.69.234/32	10.167.69.234 – 10.167.69.234	10.167.69.234
108	10.167.69.235/32	10.167.69.235 – 10.167.69.235	10.167.69.235
109	10.167.69.236/32	10.167.69.236 – 10.167.69.236	10.167.69.236
110	10.167.69.237/32	10.167.69.237 – 10.167.69.237	10.167.69.237
111	10.167.69.238/32	10.167.69.238 – 10.167.69.238	10.167.69.238
112	10.167.69.239/32	10.167.69.239 – 10.167.69.239	10.167.69.239
113	10.167.69.240/32	10.167.69.240 – 10.167.69.240	10.167.69.240
114	10.167.69.241/32	10.167.69.241 – 10.167.69.241	10.167.69.241
115	10.167.69.242/32	10.167.69.242 – 10.167.69.242	10.167.69.242
116	10.167.69.243/32	10.167.69.243 – 10.167.69.243	10.167.69.243
117	10.167.69.244/32	10.167.69.244 – 10.167.69.244	10.167.69.244
118	10.167.69.245/32	10.167.69.245 – 10.167.69.245	10.167.69.245
119	10.167.69.246/32	10.167.69.246 – 10.167.69.246	10.167.69.246
120	10.167.69.247/32	10.167.69.247 – 10.167.69.247	10.167.69.247
121	10.167.69.248/32	10.167.69.248 – 10.167.69.248	10.167.69.248
122	10.167.69.249/32	10.167.69.249 – 10.167.69.249	10.167.69.249
123	10.167.69.250/32	10.167.69.250 – 10.167.69.250	10.167.69.250
124	10.167.69.251/32	10.167.69.251 – 10.167.69.251	10.167.69.251
125	10.167.69.252/32	10.167.69.252 – 10.167.69.252	10.167.69.252
126	10.167.69.253/32	10.167.69.253 – 10.167.69.253	10.167.69.253
127	10.167.69.254/32	10.167.69.254 – 10.167.69.254	10.167.69.254
128	10.167.69.255/32	10.167.69.255 – 10.167.69.255	10.167.69.255

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 →