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)10.76.41.128/25

network10.76.41.128/25

broadcast10.76.41.255

first host10.76.41.129

last host10.76.41.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.76.41.128/25

address00001010.01001100.00101001.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.01001100.00101001.10000000

broadcast00001010.01001100.00101001.11111111

green = network part, grey = host part

hex0x0a4c2980

decimal172763520

reverse dns128.41.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:2980

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.76.41.128/32	10.76.41.128 – 10.76.41.128	10.76.41.128
2	10.76.41.129/32	10.76.41.129 – 10.76.41.129	10.76.41.129
3	10.76.41.130/32	10.76.41.130 – 10.76.41.130	10.76.41.130
4	10.76.41.131/32	10.76.41.131 – 10.76.41.131	10.76.41.131
5	10.76.41.132/32	10.76.41.132 – 10.76.41.132	10.76.41.132
6	10.76.41.133/32	10.76.41.133 – 10.76.41.133	10.76.41.133
7	10.76.41.134/32	10.76.41.134 – 10.76.41.134	10.76.41.134
8	10.76.41.135/32	10.76.41.135 – 10.76.41.135	10.76.41.135
9	10.76.41.136/32	10.76.41.136 – 10.76.41.136	10.76.41.136
10	10.76.41.137/32	10.76.41.137 – 10.76.41.137	10.76.41.137
11	10.76.41.138/32	10.76.41.138 – 10.76.41.138	10.76.41.138
12	10.76.41.139/32	10.76.41.139 – 10.76.41.139	10.76.41.139
13	10.76.41.140/32	10.76.41.140 – 10.76.41.140	10.76.41.140
14	10.76.41.141/32	10.76.41.141 – 10.76.41.141	10.76.41.141
15	10.76.41.142/32	10.76.41.142 – 10.76.41.142	10.76.41.142
16	10.76.41.143/32	10.76.41.143 – 10.76.41.143	10.76.41.143
17	10.76.41.144/32	10.76.41.144 – 10.76.41.144	10.76.41.144
18	10.76.41.145/32	10.76.41.145 – 10.76.41.145	10.76.41.145
19	10.76.41.146/32	10.76.41.146 – 10.76.41.146	10.76.41.146
20	10.76.41.147/32	10.76.41.147 – 10.76.41.147	10.76.41.147
21	10.76.41.148/32	10.76.41.148 – 10.76.41.148	10.76.41.148
22	10.76.41.149/32	10.76.41.149 – 10.76.41.149	10.76.41.149
23	10.76.41.150/32	10.76.41.150 – 10.76.41.150	10.76.41.150
24	10.76.41.151/32	10.76.41.151 – 10.76.41.151	10.76.41.151
25	10.76.41.152/32	10.76.41.152 – 10.76.41.152	10.76.41.152
26	10.76.41.153/32	10.76.41.153 – 10.76.41.153	10.76.41.153
27	10.76.41.154/32	10.76.41.154 – 10.76.41.154	10.76.41.154
28	10.76.41.155/32	10.76.41.155 – 10.76.41.155	10.76.41.155
29	10.76.41.156/32	10.76.41.156 – 10.76.41.156	10.76.41.156
30	10.76.41.157/32	10.76.41.157 – 10.76.41.157	10.76.41.157
31	10.76.41.158/32	10.76.41.158 – 10.76.41.158	10.76.41.158
32	10.76.41.159/32	10.76.41.159 – 10.76.41.159	10.76.41.159
33	10.76.41.160/32	10.76.41.160 – 10.76.41.160	10.76.41.160
34	10.76.41.161/32	10.76.41.161 – 10.76.41.161	10.76.41.161
35	10.76.41.162/32	10.76.41.162 – 10.76.41.162	10.76.41.162
36	10.76.41.163/32	10.76.41.163 – 10.76.41.163	10.76.41.163
37	10.76.41.164/32	10.76.41.164 – 10.76.41.164	10.76.41.164
38	10.76.41.165/32	10.76.41.165 – 10.76.41.165	10.76.41.165
39	10.76.41.166/32	10.76.41.166 – 10.76.41.166	10.76.41.166
40	10.76.41.167/32	10.76.41.167 – 10.76.41.167	10.76.41.167
41	10.76.41.168/32	10.76.41.168 – 10.76.41.168	10.76.41.168
42	10.76.41.169/32	10.76.41.169 – 10.76.41.169	10.76.41.169
43	10.76.41.170/32	10.76.41.170 – 10.76.41.170	10.76.41.170
44	10.76.41.171/32	10.76.41.171 – 10.76.41.171	10.76.41.171
45	10.76.41.172/32	10.76.41.172 – 10.76.41.172	10.76.41.172
46	10.76.41.173/32	10.76.41.173 – 10.76.41.173	10.76.41.173
47	10.76.41.174/32	10.76.41.174 – 10.76.41.174	10.76.41.174
48	10.76.41.175/32	10.76.41.175 – 10.76.41.175	10.76.41.175
49	10.76.41.176/32	10.76.41.176 – 10.76.41.176	10.76.41.176
50	10.76.41.177/32	10.76.41.177 – 10.76.41.177	10.76.41.177
51	10.76.41.178/32	10.76.41.178 – 10.76.41.178	10.76.41.178
52	10.76.41.179/32	10.76.41.179 – 10.76.41.179	10.76.41.179
53	10.76.41.180/32	10.76.41.180 – 10.76.41.180	10.76.41.180
54	10.76.41.181/32	10.76.41.181 – 10.76.41.181	10.76.41.181
55	10.76.41.182/32	10.76.41.182 – 10.76.41.182	10.76.41.182
56	10.76.41.183/32	10.76.41.183 – 10.76.41.183	10.76.41.183
57	10.76.41.184/32	10.76.41.184 – 10.76.41.184	10.76.41.184
58	10.76.41.185/32	10.76.41.185 – 10.76.41.185	10.76.41.185
59	10.76.41.186/32	10.76.41.186 – 10.76.41.186	10.76.41.186
60	10.76.41.187/32	10.76.41.187 – 10.76.41.187	10.76.41.187
61	10.76.41.188/32	10.76.41.188 – 10.76.41.188	10.76.41.188
62	10.76.41.189/32	10.76.41.189 – 10.76.41.189	10.76.41.189
63	10.76.41.190/32	10.76.41.190 – 10.76.41.190	10.76.41.190
64	10.76.41.191/32	10.76.41.191 – 10.76.41.191	10.76.41.191
65	10.76.41.192/32	10.76.41.192 – 10.76.41.192	10.76.41.192
66	10.76.41.193/32	10.76.41.193 – 10.76.41.193	10.76.41.193
67	10.76.41.194/32	10.76.41.194 – 10.76.41.194	10.76.41.194
68	10.76.41.195/32	10.76.41.195 – 10.76.41.195	10.76.41.195
69	10.76.41.196/32	10.76.41.196 – 10.76.41.196	10.76.41.196
70	10.76.41.197/32	10.76.41.197 – 10.76.41.197	10.76.41.197
71	10.76.41.198/32	10.76.41.198 – 10.76.41.198	10.76.41.198
72	10.76.41.199/32	10.76.41.199 – 10.76.41.199	10.76.41.199
73	10.76.41.200/32	10.76.41.200 – 10.76.41.200	10.76.41.200
74	10.76.41.201/32	10.76.41.201 – 10.76.41.201	10.76.41.201
75	10.76.41.202/32	10.76.41.202 – 10.76.41.202	10.76.41.202
76	10.76.41.203/32	10.76.41.203 – 10.76.41.203	10.76.41.203
77	10.76.41.204/32	10.76.41.204 – 10.76.41.204	10.76.41.204
78	10.76.41.205/32	10.76.41.205 – 10.76.41.205	10.76.41.205
79	10.76.41.206/32	10.76.41.206 – 10.76.41.206	10.76.41.206
80	10.76.41.207/32	10.76.41.207 – 10.76.41.207	10.76.41.207
81	10.76.41.208/32	10.76.41.208 – 10.76.41.208	10.76.41.208
82	10.76.41.209/32	10.76.41.209 – 10.76.41.209	10.76.41.209
83	10.76.41.210/32	10.76.41.210 – 10.76.41.210	10.76.41.210
84	10.76.41.211/32	10.76.41.211 – 10.76.41.211	10.76.41.211
85	10.76.41.212/32	10.76.41.212 – 10.76.41.212	10.76.41.212
86	10.76.41.213/32	10.76.41.213 – 10.76.41.213	10.76.41.213
87	10.76.41.214/32	10.76.41.214 – 10.76.41.214	10.76.41.214
88	10.76.41.215/32	10.76.41.215 – 10.76.41.215	10.76.41.215
89	10.76.41.216/32	10.76.41.216 – 10.76.41.216	10.76.41.216
90	10.76.41.217/32	10.76.41.217 – 10.76.41.217	10.76.41.217
91	10.76.41.218/32	10.76.41.218 – 10.76.41.218	10.76.41.218
92	10.76.41.219/32	10.76.41.219 – 10.76.41.219	10.76.41.219
93	10.76.41.220/32	10.76.41.220 – 10.76.41.220	10.76.41.220
94	10.76.41.221/32	10.76.41.221 – 10.76.41.221	10.76.41.221
95	10.76.41.222/32	10.76.41.222 – 10.76.41.222	10.76.41.222
96	10.76.41.223/32	10.76.41.223 – 10.76.41.223	10.76.41.223
97	10.76.41.224/32	10.76.41.224 – 10.76.41.224	10.76.41.224
98	10.76.41.225/32	10.76.41.225 – 10.76.41.225	10.76.41.225
99	10.76.41.226/32	10.76.41.226 – 10.76.41.226	10.76.41.226
100	10.76.41.227/32	10.76.41.227 – 10.76.41.227	10.76.41.227
101	10.76.41.228/32	10.76.41.228 – 10.76.41.228	10.76.41.228
102	10.76.41.229/32	10.76.41.229 – 10.76.41.229	10.76.41.229
103	10.76.41.230/32	10.76.41.230 – 10.76.41.230	10.76.41.230
104	10.76.41.231/32	10.76.41.231 – 10.76.41.231	10.76.41.231
105	10.76.41.232/32	10.76.41.232 – 10.76.41.232	10.76.41.232
106	10.76.41.233/32	10.76.41.233 – 10.76.41.233	10.76.41.233
107	10.76.41.234/32	10.76.41.234 – 10.76.41.234	10.76.41.234
108	10.76.41.235/32	10.76.41.235 – 10.76.41.235	10.76.41.235
109	10.76.41.236/32	10.76.41.236 – 10.76.41.236	10.76.41.236
110	10.76.41.237/32	10.76.41.237 – 10.76.41.237	10.76.41.237
111	10.76.41.238/32	10.76.41.238 – 10.76.41.238	10.76.41.238
112	10.76.41.239/32	10.76.41.239 – 10.76.41.239	10.76.41.239
113	10.76.41.240/32	10.76.41.240 – 10.76.41.240	10.76.41.240
114	10.76.41.241/32	10.76.41.241 – 10.76.41.241	10.76.41.241
115	10.76.41.242/32	10.76.41.242 – 10.76.41.242	10.76.41.242
116	10.76.41.243/32	10.76.41.243 – 10.76.41.243	10.76.41.243
117	10.76.41.244/32	10.76.41.244 – 10.76.41.244	10.76.41.244
118	10.76.41.245/32	10.76.41.245 – 10.76.41.245	10.76.41.245
119	10.76.41.246/32	10.76.41.246 – 10.76.41.246	10.76.41.246
120	10.76.41.247/32	10.76.41.247 – 10.76.41.247	10.76.41.247
121	10.76.41.248/32	10.76.41.248 – 10.76.41.248	10.76.41.248
122	10.76.41.249/32	10.76.41.249 – 10.76.41.249	10.76.41.249
123	10.76.41.250/32	10.76.41.250 – 10.76.41.250	10.76.41.250
124	10.76.41.251/32	10.76.41.251 – 10.76.41.251	10.76.41.251
125	10.76.41.252/32	10.76.41.252 – 10.76.41.252	10.76.41.252
126	10.76.41.253/32	10.76.41.253 – 10.76.41.253	10.76.41.253
127	10.76.41.254/32	10.76.41.254 – 10.76.41.254	10.76.41.254
128	10.76.41.255/32	10.76.41.255 – 10.76.41.255	10.76.41.255

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 →