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)10.0.119.128/25

network10.0.119.128/25

broadcast10.0.119.255

first host10.0.119.129

last host10.0.119.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.0.119.128/25

address00001010.00000000.01110111.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000000.01110111.10000000

broadcast00001010.00000000.01110111.11111111

green = network part, grey = host part

hex0x0a007780

decimal167802752

reverse dns128.119.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:7780

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.119.128/32	10.0.119.128 – 10.0.119.128	10.0.119.128
2	10.0.119.129/32	10.0.119.129 – 10.0.119.129	10.0.119.129
3	10.0.119.130/32	10.0.119.130 – 10.0.119.130	10.0.119.130
4	10.0.119.131/32	10.0.119.131 – 10.0.119.131	10.0.119.131
5	10.0.119.132/32	10.0.119.132 – 10.0.119.132	10.0.119.132
6	10.0.119.133/32	10.0.119.133 – 10.0.119.133	10.0.119.133
7	10.0.119.134/32	10.0.119.134 – 10.0.119.134	10.0.119.134
8	10.0.119.135/32	10.0.119.135 – 10.0.119.135	10.0.119.135
9	10.0.119.136/32	10.0.119.136 – 10.0.119.136	10.0.119.136
10	10.0.119.137/32	10.0.119.137 – 10.0.119.137	10.0.119.137
11	10.0.119.138/32	10.0.119.138 – 10.0.119.138	10.0.119.138
12	10.0.119.139/32	10.0.119.139 – 10.0.119.139	10.0.119.139
13	10.0.119.140/32	10.0.119.140 – 10.0.119.140	10.0.119.140
14	10.0.119.141/32	10.0.119.141 – 10.0.119.141	10.0.119.141
15	10.0.119.142/32	10.0.119.142 – 10.0.119.142	10.0.119.142
16	10.0.119.143/32	10.0.119.143 – 10.0.119.143	10.0.119.143
17	10.0.119.144/32	10.0.119.144 – 10.0.119.144	10.0.119.144
18	10.0.119.145/32	10.0.119.145 – 10.0.119.145	10.0.119.145
19	10.0.119.146/32	10.0.119.146 – 10.0.119.146	10.0.119.146
20	10.0.119.147/32	10.0.119.147 – 10.0.119.147	10.0.119.147
21	10.0.119.148/32	10.0.119.148 – 10.0.119.148	10.0.119.148
22	10.0.119.149/32	10.0.119.149 – 10.0.119.149	10.0.119.149
23	10.0.119.150/32	10.0.119.150 – 10.0.119.150	10.0.119.150
24	10.0.119.151/32	10.0.119.151 – 10.0.119.151	10.0.119.151
25	10.0.119.152/32	10.0.119.152 – 10.0.119.152	10.0.119.152
26	10.0.119.153/32	10.0.119.153 – 10.0.119.153	10.0.119.153
27	10.0.119.154/32	10.0.119.154 – 10.0.119.154	10.0.119.154
28	10.0.119.155/32	10.0.119.155 – 10.0.119.155	10.0.119.155
29	10.0.119.156/32	10.0.119.156 – 10.0.119.156	10.0.119.156
30	10.0.119.157/32	10.0.119.157 – 10.0.119.157	10.0.119.157
31	10.0.119.158/32	10.0.119.158 – 10.0.119.158	10.0.119.158
32	10.0.119.159/32	10.0.119.159 – 10.0.119.159	10.0.119.159
33	10.0.119.160/32	10.0.119.160 – 10.0.119.160	10.0.119.160
34	10.0.119.161/32	10.0.119.161 – 10.0.119.161	10.0.119.161
35	10.0.119.162/32	10.0.119.162 – 10.0.119.162	10.0.119.162
36	10.0.119.163/32	10.0.119.163 – 10.0.119.163	10.0.119.163
37	10.0.119.164/32	10.0.119.164 – 10.0.119.164	10.0.119.164
38	10.0.119.165/32	10.0.119.165 – 10.0.119.165	10.0.119.165
39	10.0.119.166/32	10.0.119.166 – 10.0.119.166	10.0.119.166
40	10.0.119.167/32	10.0.119.167 – 10.0.119.167	10.0.119.167
41	10.0.119.168/32	10.0.119.168 – 10.0.119.168	10.0.119.168
42	10.0.119.169/32	10.0.119.169 – 10.0.119.169	10.0.119.169
43	10.0.119.170/32	10.0.119.170 – 10.0.119.170	10.0.119.170
44	10.0.119.171/32	10.0.119.171 – 10.0.119.171	10.0.119.171
45	10.0.119.172/32	10.0.119.172 – 10.0.119.172	10.0.119.172
46	10.0.119.173/32	10.0.119.173 – 10.0.119.173	10.0.119.173
47	10.0.119.174/32	10.0.119.174 – 10.0.119.174	10.0.119.174
48	10.0.119.175/32	10.0.119.175 – 10.0.119.175	10.0.119.175
49	10.0.119.176/32	10.0.119.176 – 10.0.119.176	10.0.119.176
50	10.0.119.177/32	10.0.119.177 – 10.0.119.177	10.0.119.177
51	10.0.119.178/32	10.0.119.178 – 10.0.119.178	10.0.119.178
52	10.0.119.179/32	10.0.119.179 – 10.0.119.179	10.0.119.179
53	10.0.119.180/32	10.0.119.180 – 10.0.119.180	10.0.119.180
54	10.0.119.181/32	10.0.119.181 – 10.0.119.181	10.0.119.181
55	10.0.119.182/32	10.0.119.182 – 10.0.119.182	10.0.119.182
56	10.0.119.183/32	10.0.119.183 – 10.0.119.183	10.0.119.183
57	10.0.119.184/32	10.0.119.184 – 10.0.119.184	10.0.119.184
58	10.0.119.185/32	10.0.119.185 – 10.0.119.185	10.0.119.185
59	10.0.119.186/32	10.0.119.186 – 10.0.119.186	10.0.119.186
60	10.0.119.187/32	10.0.119.187 – 10.0.119.187	10.0.119.187
61	10.0.119.188/32	10.0.119.188 – 10.0.119.188	10.0.119.188
62	10.0.119.189/32	10.0.119.189 – 10.0.119.189	10.0.119.189
63	10.0.119.190/32	10.0.119.190 – 10.0.119.190	10.0.119.190
64	10.0.119.191/32	10.0.119.191 – 10.0.119.191	10.0.119.191
65	10.0.119.192/32	10.0.119.192 – 10.0.119.192	10.0.119.192
66	10.0.119.193/32	10.0.119.193 – 10.0.119.193	10.0.119.193
67	10.0.119.194/32	10.0.119.194 – 10.0.119.194	10.0.119.194
68	10.0.119.195/32	10.0.119.195 – 10.0.119.195	10.0.119.195
69	10.0.119.196/32	10.0.119.196 – 10.0.119.196	10.0.119.196
70	10.0.119.197/32	10.0.119.197 – 10.0.119.197	10.0.119.197
71	10.0.119.198/32	10.0.119.198 – 10.0.119.198	10.0.119.198
72	10.0.119.199/32	10.0.119.199 – 10.0.119.199	10.0.119.199
73	10.0.119.200/32	10.0.119.200 – 10.0.119.200	10.0.119.200
74	10.0.119.201/32	10.0.119.201 – 10.0.119.201	10.0.119.201
75	10.0.119.202/32	10.0.119.202 – 10.0.119.202	10.0.119.202
76	10.0.119.203/32	10.0.119.203 – 10.0.119.203	10.0.119.203
77	10.0.119.204/32	10.0.119.204 – 10.0.119.204	10.0.119.204
78	10.0.119.205/32	10.0.119.205 – 10.0.119.205	10.0.119.205
79	10.0.119.206/32	10.0.119.206 – 10.0.119.206	10.0.119.206
80	10.0.119.207/32	10.0.119.207 – 10.0.119.207	10.0.119.207
81	10.0.119.208/32	10.0.119.208 – 10.0.119.208	10.0.119.208
82	10.0.119.209/32	10.0.119.209 – 10.0.119.209	10.0.119.209
83	10.0.119.210/32	10.0.119.210 – 10.0.119.210	10.0.119.210
84	10.0.119.211/32	10.0.119.211 – 10.0.119.211	10.0.119.211
85	10.0.119.212/32	10.0.119.212 – 10.0.119.212	10.0.119.212
86	10.0.119.213/32	10.0.119.213 – 10.0.119.213	10.0.119.213
87	10.0.119.214/32	10.0.119.214 – 10.0.119.214	10.0.119.214
88	10.0.119.215/32	10.0.119.215 – 10.0.119.215	10.0.119.215
89	10.0.119.216/32	10.0.119.216 – 10.0.119.216	10.0.119.216
90	10.0.119.217/32	10.0.119.217 – 10.0.119.217	10.0.119.217
91	10.0.119.218/32	10.0.119.218 – 10.0.119.218	10.0.119.218
92	10.0.119.219/32	10.0.119.219 – 10.0.119.219	10.0.119.219
93	10.0.119.220/32	10.0.119.220 – 10.0.119.220	10.0.119.220
94	10.0.119.221/32	10.0.119.221 – 10.0.119.221	10.0.119.221
95	10.0.119.222/32	10.0.119.222 – 10.0.119.222	10.0.119.222
96	10.0.119.223/32	10.0.119.223 – 10.0.119.223	10.0.119.223
97	10.0.119.224/32	10.0.119.224 – 10.0.119.224	10.0.119.224
98	10.0.119.225/32	10.0.119.225 – 10.0.119.225	10.0.119.225
99	10.0.119.226/32	10.0.119.226 – 10.0.119.226	10.0.119.226
100	10.0.119.227/32	10.0.119.227 – 10.0.119.227	10.0.119.227
101	10.0.119.228/32	10.0.119.228 – 10.0.119.228	10.0.119.228
102	10.0.119.229/32	10.0.119.229 – 10.0.119.229	10.0.119.229
103	10.0.119.230/32	10.0.119.230 – 10.0.119.230	10.0.119.230
104	10.0.119.231/32	10.0.119.231 – 10.0.119.231	10.0.119.231
105	10.0.119.232/32	10.0.119.232 – 10.0.119.232	10.0.119.232
106	10.0.119.233/32	10.0.119.233 – 10.0.119.233	10.0.119.233
107	10.0.119.234/32	10.0.119.234 – 10.0.119.234	10.0.119.234
108	10.0.119.235/32	10.0.119.235 – 10.0.119.235	10.0.119.235
109	10.0.119.236/32	10.0.119.236 – 10.0.119.236	10.0.119.236
110	10.0.119.237/32	10.0.119.237 – 10.0.119.237	10.0.119.237
111	10.0.119.238/32	10.0.119.238 – 10.0.119.238	10.0.119.238
112	10.0.119.239/32	10.0.119.239 – 10.0.119.239	10.0.119.239
113	10.0.119.240/32	10.0.119.240 – 10.0.119.240	10.0.119.240
114	10.0.119.241/32	10.0.119.241 – 10.0.119.241	10.0.119.241
115	10.0.119.242/32	10.0.119.242 – 10.0.119.242	10.0.119.242
116	10.0.119.243/32	10.0.119.243 – 10.0.119.243	10.0.119.243
117	10.0.119.244/32	10.0.119.244 – 10.0.119.244	10.0.119.244
118	10.0.119.245/32	10.0.119.245 – 10.0.119.245	10.0.119.245
119	10.0.119.246/32	10.0.119.246 – 10.0.119.246	10.0.119.246
120	10.0.119.247/32	10.0.119.247 – 10.0.119.247	10.0.119.247
121	10.0.119.248/32	10.0.119.248 – 10.0.119.248	10.0.119.248
122	10.0.119.249/32	10.0.119.249 – 10.0.119.249	10.0.119.249
123	10.0.119.250/32	10.0.119.250 – 10.0.119.250	10.0.119.250
124	10.0.119.251/32	10.0.119.251 – 10.0.119.251	10.0.119.251
125	10.0.119.252/32	10.0.119.252 – 10.0.119.252	10.0.119.252
126	10.0.119.253/32	10.0.119.253 – 10.0.119.253	10.0.119.253
127	10.0.119.254/32	10.0.119.254 – 10.0.119.254	10.0.119.254
128	10.0.119.255/32	10.0.119.255 – 10.0.119.255	10.0.119.255

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 →