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)10.76.44.128/25

network10.76.44.128/25

broadcast10.76.44.255

first host10.76.44.129

last host10.76.44.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.76.44.128/25

address00001010.01001100.00101100.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.01001100.00101100.10000000

broadcast00001010.01001100.00101100.11111111

green = network part, grey = host part

hex0x0a4c2c80

decimal172764288

reverse dns128.44.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:2c80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.76.44.128/32	10.76.44.128 – 10.76.44.128	10.76.44.128
2	10.76.44.129/32	10.76.44.129 – 10.76.44.129	10.76.44.129
3	10.76.44.130/32	10.76.44.130 – 10.76.44.130	10.76.44.130
4	10.76.44.131/32	10.76.44.131 – 10.76.44.131	10.76.44.131
5	10.76.44.132/32	10.76.44.132 – 10.76.44.132	10.76.44.132
6	10.76.44.133/32	10.76.44.133 – 10.76.44.133	10.76.44.133
7	10.76.44.134/32	10.76.44.134 – 10.76.44.134	10.76.44.134
8	10.76.44.135/32	10.76.44.135 – 10.76.44.135	10.76.44.135
9	10.76.44.136/32	10.76.44.136 – 10.76.44.136	10.76.44.136
10	10.76.44.137/32	10.76.44.137 – 10.76.44.137	10.76.44.137
11	10.76.44.138/32	10.76.44.138 – 10.76.44.138	10.76.44.138
12	10.76.44.139/32	10.76.44.139 – 10.76.44.139	10.76.44.139
13	10.76.44.140/32	10.76.44.140 – 10.76.44.140	10.76.44.140
14	10.76.44.141/32	10.76.44.141 – 10.76.44.141	10.76.44.141
15	10.76.44.142/32	10.76.44.142 – 10.76.44.142	10.76.44.142
16	10.76.44.143/32	10.76.44.143 – 10.76.44.143	10.76.44.143
17	10.76.44.144/32	10.76.44.144 – 10.76.44.144	10.76.44.144
18	10.76.44.145/32	10.76.44.145 – 10.76.44.145	10.76.44.145
19	10.76.44.146/32	10.76.44.146 – 10.76.44.146	10.76.44.146
20	10.76.44.147/32	10.76.44.147 – 10.76.44.147	10.76.44.147
21	10.76.44.148/32	10.76.44.148 – 10.76.44.148	10.76.44.148
22	10.76.44.149/32	10.76.44.149 – 10.76.44.149	10.76.44.149
23	10.76.44.150/32	10.76.44.150 – 10.76.44.150	10.76.44.150
24	10.76.44.151/32	10.76.44.151 – 10.76.44.151	10.76.44.151
25	10.76.44.152/32	10.76.44.152 – 10.76.44.152	10.76.44.152
26	10.76.44.153/32	10.76.44.153 – 10.76.44.153	10.76.44.153
27	10.76.44.154/32	10.76.44.154 – 10.76.44.154	10.76.44.154
28	10.76.44.155/32	10.76.44.155 – 10.76.44.155	10.76.44.155
29	10.76.44.156/32	10.76.44.156 – 10.76.44.156	10.76.44.156
30	10.76.44.157/32	10.76.44.157 – 10.76.44.157	10.76.44.157
31	10.76.44.158/32	10.76.44.158 – 10.76.44.158	10.76.44.158
32	10.76.44.159/32	10.76.44.159 – 10.76.44.159	10.76.44.159
33	10.76.44.160/32	10.76.44.160 – 10.76.44.160	10.76.44.160
34	10.76.44.161/32	10.76.44.161 – 10.76.44.161	10.76.44.161
35	10.76.44.162/32	10.76.44.162 – 10.76.44.162	10.76.44.162
36	10.76.44.163/32	10.76.44.163 – 10.76.44.163	10.76.44.163
37	10.76.44.164/32	10.76.44.164 – 10.76.44.164	10.76.44.164
38	10.76.44.165/32	10.76.44.165 – 10.76.44.165	10.76.44.165
39	10.76.44.166/32	10.76.44.166 – 10.76.44.166	10.76.44.166
40	10.76.44.167/32	10.76.44.167 – 10.76.44.167	10.76.44.167
41	10.76.44.168/32	10.76.44.168 – 10.76.44.168	10.76.44.168
42	10.76.44.169/32	10.76.44.169 – 10.76.44.169	10.76.44.169
43	10.76.44.170/32	10.76.44.170 – 10.76.44.170	10.76.44.170
44	10.76.44.171/32	10.76.44.171 – 10.76.44.171	10.76.44.171
45	10.76.44.172/32	10.76.44.172 – 10.76.44.172	10.76.44.172
46	10.76.44.173/32	10.76.44.173 – 10.76.44.173	10.76.44.173
47	10.76.44.174/32	10.76.44.174 – 10.76.44.174	10.76.44.174
48	10.76.44.175/32	10.76.44.175 – 10.76.44.175	10.76.44.175
49	10.76.44.176/32	10.76.44.176 – 10.76.44.176	10.76.44.176
50	10.76.44.177/32	10.76.44.177 – 10.76.44.177	10.76.44.177
51	10.76.44.178/32	10.76.44.178 – 10.76.44.178	10.76.44.178
52	10.76.44.179/32	10.76.44.179 – 10.76.44.179	10.76.44.179
53	10.76.44.180/32	10.76.44.180 – 10.76.44.180	10.76.44.180
54	10.76.44.181/32	10.76.44.181 – 10.76.44.181	10.76.44.181
55	10.76.44.182/32	10.76.44.182 – 10.76.44.182	10.76.44.182
56	10.76.44.183/32	10.76.44.183 – 10.76.44.183	10.76.44.183
57	10.76.44.184/32	10.76.44.184 – 10.76.44.184	10.76.44.184
58	10.76.44.185/32	10.76.44.185 – 10.76.44.185	10.76.44.185
59	10.76.44.186/32	10.76.44.186 – 10.76.44.186	10.76.44.186
60	10.76.44.187/32	10.76.44.187 – 10.76.44.187	10.76.44.187
61	10.76.44.188/32	10.76.44.188 – 10.76.44.188	10.76.44.188
62	10.76.44.189/32	10.76.44.189 – 10.76.44.189	10.76.44.189
63	10.76.44.190/32	10.76.44.190 – 10.76.44.190	10.76.44.190
64	10.76.44.191/32	10.76.44.191 – 10.76.44.191	10.76.44.191
65	10.76.44.192/32	10.76.44.192 – 10.76.44.192	10.76.44.192
66	10.76.44.193/32	10.76.44.193 – 10.76.44.193	10.76.44.193
67	10.76.44.194/32	10.76.44.194 – 10.76.44.194	10.76.44.194
68	10.76.44.195/32	10.76.44.195 – 10.76.44.195	10.76.44.195
69	10.76.44.196/32	10.76.44.196 – 10.76.44.196	10.76.44.196
70	10.76.44.197/32	10.76.44.197 – 10.76.44.197	10.76.44.197
71	10.76.44.198/32	10.76.44.198 – 10.76.44.198	10.76.44.198
72	10.76.44.199/32	10.76.44.199 – 10.76.44.199	10.76.44.199
73	10.76.44.200/32	10.76.44.200 – 10.76.44.200	10.76.44.200
74	10.76.44.201/32	10.76.44.201 – 10.76.44.201	10.76.44.201
75	10.76.44.202/32	10.76.44.202 – 10.76.44.202	10.76.44.202
76	10.76.44.203/32	10.76.44.203 – 10.76.44.203	10.76.44.203
77	10.76.44.204/32	10.76.44.204 – 10.76.44.204	10.76.44.204
78	10.76.44.205/32	10.76.44.205 – 10.76.44.205	10.76.44.205
79	10.76.44.206/32	10.76.44.206 – 10.76.44.206	10.76.44.206
80	10.76.44.207/32	10.76.44.207 – 10.76.44.207	10.76.44.207
81	10.76.44.208/32	10.76.44.208 – 10.76.44.208	10.76.44.208
82	10.76.44.209/32	10.76.44.209 – 10.76.44.209	10.76.44.209
83	10.76.44.210/32	10.76.44.210 – 10.76.44.210	10.76.44.210
84	10.76.44.211/32	10.76.44.211 – 10.76.44.211	10.76.44.211
85	10.76.44.212/32	10.76.44.212 – 10.76.44.212	10.76.44.212
86	10.76.44.213/32	10.76.44.213 – 10.76.44.213	10.76.44.213
87	10.76.44.214/32	10.76.44.214 – 10.76.44.214	10.76.44.214
88	10.76.44.215/32	10.76.44.215 – 10.76.44.215	10.76.44.215
89	10.76.44.216/32	10.76.44.216 – 10.76.44.216	10.76.44.216
90	10.76.44.217/32	10.76.44.217 – 10.76.44.217	10.76.44.217
91	10.76.44.218/32	10.76.44.218 – 10.76.44.218	10.76.44.218
92	10.76.44.219/32	10.76.44.219 – 10.76.44.219	10.76.44.219
93	10.76.44.220/32	10.76.44.220 – 10.76.44.220	10.76.44.220
94	10.76.44.221/32	10.76.44.221 – 10.76.44.221	10.76.44.221
95	10.76.44.222/32	10.76.44.222 – 10.76.44.222	10.76.44.222
96	10.76.44.223/32	10.76.44.223 – 10.76.44.223	10.76.44.223
97	10.76.44.224/32	10.76.44.224 – 10.76.44.224	10.76.44.224
98	10.76.44.225/32	10.76.44.225 – 10.76.44.225	10.76.44.225
99	10.76.44.226/32	10.76.44.226 – 10.76.44.226	10.76.44.226
100	10.76.44.227/32	10.76.44.227 – 10.76.44.227	10.76.44.227
101	10.76.44.228/32	10.76.44.228 – 10.76.44.228	10.76.44.228
102	10.76.44.229/32	10.76.44.229 – 10.76.44.229	10.76.44.229
103	10.76.44.230/32	10.76.44.230 – 10.76.44.230	10.76.44.230
104	10.76.44.231/32	10.76.44.231 – 10.76.44.231	10.76.44.231
105	10.76.44.232/32	10.76.44.232 – 10.76.44.232	10.76.44.232
106	10.76.44.233/32	10.76.44.233 – 10.76.44.233	10.76.44.233
107	10.76.44.234/32	10.76.44.234 – 10.76.44.234	10.76.44.234
108	10.76.44.235/32	10.76.44.235 – 10.76.44.235	10.76.44.235
109	10.76.44.236/32	10.76.44.236 – 10.76.44.236	10.76.44.236
110	10.76.44.237/32	10.76.44.237 – 10.76.44.237	10.76.44.237
111	10.76.44.238/32	10.76.44.238 – 10.76.44.238	10.76.44.238
112	10.76.44.239/32	10.76.44.239 – 10.76.44.239	10.76.44.239
113	10.76.44.240/32	10.76.44.240 – 10.76.44.240	10.76.44.240
114	10.76.44.241/32	10.76.44.241 – 10.76.44.241	10.76.44.241
115	10.76.44.242/32	10.76.44.242 – 10.76.44.242	10.76.44.242
116	10.76.44.243/32	10.76.44.243 – 10.76.44.243	10.76.44.243
117	10.76.44.244/32	10.76.44.244 – 10.76.44.244	10.76.44.244
118	10.76.44.245/32	10.76.44.245 – 10.76.44.245	10.76.44.245
119	10.76.44.246/32	10.76.44.246 – 10.76.44.246	10.76.44.246
120	10.76.44.247/32	10.76.44.247 – 10.76.44.247	10.76.44.247
121	10.76.44.248/32	10.76.44.248 – 10.76.44.248	10.76.44.248
122	10.76.44.249/32	10.76.44.249 – 10.76.44.249	10.76.44.249
123	10.76.44.250/32	10.76.44.250 – 10.76.44.250	10.76.44.250
124	10.76.44.251/32	10.76.44.251 – 10.76.44.251	10.76.44.251
125	10.76.44.252/32	10.76.44.252 – 10.76.44.252	10.76.44.252
126	10.76.44.253/32	10.76.44.253 – 10.76.44.253	10.76.44.253
127	10.76.44.254/32	10.76.44.254 – 10.76.44.254	10.76.44.254
128	10.76.44.255/32	10.76.44.255 – 10.76.44.255	10.76.44.255

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 →