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)10.91.96.0/23

network10.91.96.0/23

broadcast10.91.97.255

first host10.91.96.1

last host10.91.97.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.91.96.0/23

address00001010.01011011.01100000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01011011.01100000.00000000

broadcast00001010.01011011.01100001.11111111

green = network part, grey = host part

hex0x0a5b6000

decimal173760512

reverse dns0.96.91.10.in-addr.arpa

ipv4-mapped::ffff:a5b:6000

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.91.96.0/31	10.91.96.0 – 10.91.96.1	10.91.96.1
2	10.91.96.2/31	10.91.96.2 – 10.91.96.3	10.91.96.3
3	10.91.96.4/31	10.91.96.4 – 10.91.96.5	10.91.96.5
4	10.91.96.6/31	10.91.96.6 – 10.91.96.7	10.91.96.7
5	10.91.96.8/31	10.91.96.8 – 10.91.96.9	10.91.96.9
6	10.91.96.10/31	10.91.96.10 – 10.91.96.11	10.91.96.11
7	10.91.96.12/31	10.91.96.12 – 10.91.96.13	10.91.96.13
8	10.91.96.14/31	10.91.96.14 – 10.91.96.15	10.91.96.15
9	10.91.96.16/31	10.91.96.16 – 10.91.96.17	10.91.96.17
10	10.91.96.18/31	10.91.96.18 – 10.91.96.19	10.91.96.19
11	10.91.96.20/31	10.91.96.20 – 10.91.96.21	10.91.96.21
12	10.91.96.22/31	10.91.96.22 – 10.91.96.23	10.91.96.23
13	10.91.96.24/31	10.91.96.24 – 10.91.96.25	10.91.96.25
14	10.91.96.26/31	10.91.96.26 – 10.91.96.27	10.91.96.27
15	10.91.96.28/31	10.91.96.28 – 10.91.96.29	10.91.96.29
16	10.91.96.30/31	10.91.96.30 – 10.91.96.31	10.91.96.31
17	10.91.96.32/31	10.91.96.32 – 10.91.96.33	10.91.96.33
18	10.91.96.34/31	10.91.96.34 – 10.91.96.35	10.91.96.35
19	10.91.96.36/31	10.91.96.36 – 10.91.96.37	10.91.96.37
20	10.91.96.38/31	10.91.96.38 – 10.91.96.39	10.91.96.39
21	10.91.96.40/31	10.91.96.40 – 10.91.96.41	10.91.96.41
22	10.91.96.42/31	10.91.96.42 – 10.91.96.43	10.91.96.43
23	10.91.96.44/31	10.91.96.44 – 10.91.96.45	10.91.96.45
24	10.91.96.46/31	10.91.96.46 – 10.91.96.47	10.91.96.47
25	10.91.96.48/31	10.91.96.48 – 10.91.96.49	10.91.96.49
26	10.91.96.50/31	10.91.96.50 – 10.91.96.51	10.91.96.51
27	10.91.96.52/31	10.91.96.52 – 10.91.96.53	10.91.96.53
28	10.91.96.54/31	10.91.96.54 – 10.91.96.55	10.91.96.55
29	10.91.96.56/31	10.91.96.56 – 10.91.96.57	10.91.96.57
30	10.91.96.58/31	10.91.96.58 – 10.91.96.59	10.91.96.59
31	10.91.96.60/31	10.91.96.60 – 10.91.96.61	10.91.96.61
32	10.91.96.62/31	10.91.96.62 – 10.91.96.63	10.91.96.63
33	10.91.96.64/31	10.91.96.64 – 10.91.96.65	10.91.96.65
34	10.91.96.66/31	10.91.96.66 – 10.91.96.67	10.91.96.67
35	10.91.96.68/31	10.91.96.68 – 10.91.96.69	10.91.96.69
36	10.91.96.70/31	10.91.96.70 – 10.91.96.71	10.91.96.71
37	10.91.96.72/31	10.91.96.72 – 10.91.96.73	10.91.96.73
38	10.91.96.74/31	10.91.96.74 – 10.91.96.75	10.91.96.75
39	10.91.96.76/31	10.91.96.76 – 10.91.96.77	10.91.96.77
40	10.91.96.78/31	10.91.96.78 – 10.91.96.79	10.91.96.79
41	10.91.96.80/31	10.91.96.80 – 10.91.96.81	10.91.96.81
42	10.91.96.82/31	10.91.96.82 – 10.91.96.83	10.91.96.83
43	10.91.96.84/31	10.91.96.84 – 10.91.96.85	10.91.96.85
44	10.91.96.86/31	10.91.96.86 – 10.91.96.87	10.91.96.87
45	10.91.96.88/31	10.91.96.88 – 10.91.96.89	10.91.96.89
46	10.91.96.90/31	10.91.96.90 – 10.91.96.91	10.91.96.91
47	10.91.96.92/31	10.91.96.92 – 10.91.96.93	10.91.96.93
48	10.91.96.94/31	10.91.96.94 – 10.91.96.95	10.91.96.95
49	10.91.96.96/31	10.91.96.96 – 10.91.96.97	10.91.96.97
50	10.91.96.98/31	10.91.96.98 – 10.91.96.99	10.91.96.99
51	10.91.96.100/31	10.91.96.100 – 10.91.96.101	10.91.96.101
52	10.91.96.102/31	10.91.96.102 – 10.91.96.103	10.91.96.103
53	10.91.96.104/31	10.91.96.104 – 10.91.96.105	10.91.96.105
54	10.91.96.106/31	10.91.96.106 – 10.91.96.107	10.91.96.107
55	10.91.96.108/31	10.91.96.108 – 10.91.96.109	10.91.96.109
56	10.91.96.110/31	10.91.96.110 – 10.91.96.111	10.91.96.111
57	10.91.96.112/31	10.91.96.112 – 10.91.96.113	10.91.96.113
58	10.91.96.114/31	10.91.96.114 – 10.91.96.115	10.91.96.115
59	10.91.96.116/31	10.91.96.116 – 10.91.96.117	10.91.96.117
60	10.91.96.118/31	10.91.96.118 – 10.91.96.119	10.91.96.119
61	10.91.96.120/31	10.91.96.120 – 10.91.96.121	10.91.96.121
62	10.91.96.122/31	10.91.96.122 – 10.91.96.123	10.91.96.123
63	10.91.96.124/31	10.91.96.124 – 10.91.96.125	10.91.96.125
64	10.91.96.126/31	10.91.96.126 – 10.91.96.127	10.91.96.127
65	10.91.96.128/31	10.91.96.128 – 10.91.96.129	10.91.96.129
66	10.91.96.130/31	10.91.96.130 – 10.91.96.131	10.91.96.131
67	10.91.96.132/31	10.91.96.132 – 10.91.96.133	10.91.96.133
68	10.91.96.134/31	10.91.96.134 – 10.91.96.135	10.91.96.135
69	10.91.96.136/31	10.91.96.136 – 10.91.96.137	10.91.96.137
70	10.91.96.138/31	10.91.96.138 – 10.91.96.139	10.91.96.139
71	10.91.96.140/31	10.91.96.140 – 10.91.96.141	10.91.96.141
72	10.91.96.142/31	10.91.96.142 – 10.91.96.143	10.91.96.143
73	10.91.96.144/31	10.91.96.144 – 10.91.96.145	10.91.96.145
74	10.91.96.146/31	10.91.96.146 – 10.91.96.147	10.91.96.147
75	10.91.96.148/31	10.91.96.148 – 10.91.96.149	10.91.96.149
76	10.91.96.150/31	10.91.96.150 – 10.91.96.151	10.91.96.151
77	10.91.96.152/31	10.91.96.152 – 10.91.96.153	10.91.96.153
78	10.91.96.154/31	10.91.96.154 – 10.91.96.155	10.91.96.155
79	10.91.96.156/31	10.91.96.156 – 10.91.96.157	10.91.96.157
80	10.91.96.158/31	10.91.96.158 – 10.91.96.159	10.91.96.159
81	10.91.96.160/31	10.91.96.160 – 10.91.96.161	10.91.96.161
82	10.91.96.162/31	10.91.96.162 – 10.91.96.163	10.91.96.163
83	10.91.96.164/31	10.91.96.164 – 10.91.96.165	10.91.96.165
84	10.91.96.166/31	10.91.96.166 – 10.91.96.167	10.91.96.167
85	10.91.96.168/31	10.91.96.168 – 10.91.96.169	10.91.96.169
86	10.91.96.170/31	10.91.96.170 – 10.91.96.171	10.91.96.171
87	10.91.96.172/31	10.91.96.172 – 10.91.96.173	10.91.96.173
88	10.91.96.174/31	10.91.96.174 – 10.91.96.175	10.91.96.175
89	10.91.96.176/31	10.91.96.176 – 10.91.96.177	10.91.96.177
90	10.91.96.178/31	10.91.96.178 – 10.91.96.179	10.91.96.179
91	10.91.96.180/31	10.91.96.180 – 10.91.96.181	10.91.96.181
92	10.91.96.182/31	10.91.96.182 – 10.91.96.183	10.91.96.183
93	10.91.96.184/31	10.91.96.184 – 10.91.96.185	10.91.96.185
94	10.91.96.186/31	10.91.96.186 – 10.91.96.187	10.91.96.187
95	10.91.96.188/31	10.91.96.188 – 10.91.96.189	10.91.96.189
96	10.91.96.190/31	10.91.96.190 – 10.91.96.191	10.91.96.191
97	10.91.96.192/31	10.91.96.192 – 10.91.96.193	10.91.96.193
98	10.91.96.194/31	10.91.96.194 – 10.91.96.195	10.91.96.195
99	10.91.96.196/31	10.91.96.196 – 10.91.96.197	10.91.96.197
100	10.91.96.198/31	10.91.96.198 – 10.91.96.199	10.91.96.199
101	10.91.96.200/31	10.91.96.200 – 10.91.96.201	10.91.96.201
102	10.91.96.202/31	10.91.96.202 – 10.91.96.203	10.91.96.203
103	10.91.96.204/31	10.91.96.204 – 10.91.96.205	10.91.96.205
104	10.91.96.206/31	10.91.96.206 – 10.91.96.207	10.91.96.207
105	10.91.96.208/31	10.91.96.208 – 10.91.96.209	10.91.96.209
106	10.91.96.210/31	10.91.96.210 – 10.91.96.211	10.91.96.211
107	10.91.96.212/31	10.91.96.212 – 10.91.96.213	10.91.96.213
108	10.91.96.214/31	10.91.96.214 – 10.91.96.215	10.91.96.215
109	10.91.96.216/31	10.91.96.216 – 10.91.96.217	10.91.96.217
110	10.91.96.218/31	10.91.96.218 – 10.91.96.219	10.91.96.219
111	10.91.96.220/31	10.91.96.220 – 10.91.96.221	10.91.96.221
112	10.91.96.222/31	10.91.96.222 – 10.91.96.223	10.91.96.223
113	10.91.96.224/31	10.91.96.224 – 10.91.96.225	10.91.96.225
114	10.91.96.226/31	10.91.96.226 – 10.91.96.227	10.91.96.227
115	10.91.96.228/31	10.91.96.228 – 10.91.96.229	10.91.96.229
116	10.91.96.230/31	10.91.96.230 – 10.91.96.231	10.91.96.231
117	10.91.96.232/31	10.91.96.232 – 10.91.96.233	10.91.96.233
118	10.91.96.234/31	10.91.96.234 – 10.91.96.235	10.91.96.235
119	10.91.96.236/31	10.91.96.236 – 10.91.96.237	10.91.96.237
120	10.91.96.238/31	10.91.96.238 – 10.91.96.239	10.91.96.239
121	10.91.96.240/31	10.91.96.240 – 10.91.96.241	10.91.96.241
122	10.91.96.242/31	10.91.96.242 – 10.91.96.243	10.91.96.243
123	10.91.96.244/31	10.91.96.244 – 10.91.96.245	10.91.96.245
124	10.91.96.246/31	10.91.96.246 – 10.91.96.247	10.91.96.247
125	10.91.96.248/31	10.91.96.248 – 10.91.96.249	10.91.96.249
126	10.91.96.250/31	10.91.96.250 – 10.91.96.251	10.91.96.251
127	10.91.96.252/31	10.91.96.252 – 10.91.96.253	10.91.96.253
128	10.91.96.254/31	10.91.96.254 – 10.91.96.255	10.91.96.255
129	10.91.97.0/31	10.91.97.0 – 10.91.97.1	10.91.97.1
130	10.91.97.2/31	10.91.97.2 – 10.91.97.3	10.91.97.3
131	10.91.97.4/31	10.91.97.4 – 10.91.97.5	10.91.97.5
132	10.91.97.6/31	10.91.97.6 – 10.91.97.7	10.91.97.7
133	10.91.97.8/31	10.91.97.8 – 10.91.97.9	10.91.97.9
134	10.91.97.10/31	10.91.97.10 – 10.91.97.11	10.91.97.11
135	10.91.97.12/31	10.91.97.12 – 10.91.97.13	10.91.97.13
136	10.91.97.14/31	10.91.97.14 – 10.91.97.15	10.91.97.15
137	10.91.97.16/31	10.91.97.16 – 10.91.97.17	10.91.97.17
138	10.91.97.18/31	10.91.97.18 – 10.91.97.19	10.91.97.19
139	10.91.97.20/31	10.91.97.20 – 10.91.97.21	10.91.97.21
140	10.91.97.22/31	10.91.97.22 – 10.91.97.23	10.91.97.23
141	10.91.97.24/31	10.91.97.24 – 10.91.97.25	10.91.97.25
142	10.91.97.26/31	10.91.97.26 – 10.91.97.27	10.91.97.27
143	10.91.97.28/31	10.91.97.28 – 10.91.97.29	10.91.97.29
144	10.91.97.30/31	10.91.97.30 – 10.91.97.31	10.91.97.31
145	10.91.97.32/31	10.91.97.32 – 10.91.97.33	10.91.97.33
146	10.91.97.34/31	10.91.97.34 – 10.91.97.35	10.91.97.35
147	10.91.97.36/31	10.91.97.36 – 10.91.97.37	10.91.97.37
148	10.91.97.38/31	10.91.97.38 – 10.91.97.39	10.91.97.39
149	10.91.97.40/31	10.91.97.40 – 10.91.97.41	10.91.97.41
150	10.91.97.42/31	10.91.97.42 – 10.91.97.43	10.91.97.43
151	10.91.97.44/31	10.91.97.44 – 10.91.97.45	10.91.97.45
152	10.91.97.46/31	10.91.97.46 – 10.91.97.47	10.91.97.47
153	10.91.97.48/31	10.91.97.48 – 10.91.97.49	10.91.97.49
154	10.91.97.50/31	10.91.97.50 – 10.91.97.51	10.91.97.51
155	10.91.97.52/31	10.91.97.52 – 10.91.97.53	10.91.97.53
156	10.91.97.54/31	10.91.97.54 – 10.91.97.55	10.91.97.55
157	10.91.97.56/31	10.91.97.56 – 10.91.97.57	10.91.97.57
158	10.91.97.58/31	10.91.97.58 – 10.91.97.59	10.91.97.59
159	10.91.97.60/31	10.91.97.60 – 10.91.97.61	10.91.97.61
160	10.91.97.62/31	10.91.97.62 – 10.91.97.63	10.91.97.63
161	10.91.97.64/31	10.91.97.64 – 10.91.97.65	10.91.97.65
162	10.91.97.66/31	10.91.97.66 – 10.91.97.67	10.91.97.67
163	10.91.97.68/31	10.91.97.68 – 10.91.97.69	10.91.97.69
164	10.91.97.70/31	10.91.97.70 – 10.91.97.71	10.91.97.71
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210	10.91.97.162/31	10.91.97.162 – 10.91.97.163	10.91.97.163
211	10.91.97.164/31	10.91.97.164 – 10.91.97.165	10.91.97.165
212	10.91.97.166/31	10.91.97.166 – 10.91.97.167	10.91.97.167
213	10.91.97.168/31	10.91.97.168 – 10.91.97.169	10.91.97.169
214	10.91.97.170/31	10.91.97.170 – 10.91.97.171	10.91.97.171
215	10.91.97.172/31	10.91.97.172 – 10.91.97.173	10.91.97.173
216	10.91.97.174/31	10.91.97.174 – 10.91.97.175	10.91.97.175
217	10.91.97.176/31	10.91.97.176 – 10.91.97.177	10.91.97.177
218	10.91.97.178/31	10.91.97.178 – 10.91.97.179	10.91.97.179
219	10.91.97.180/31	10.91.97.180 – 10.91.97.181	10.91.97.181
220	10.91.97.182/31	10.91.97.182 – 10.91.97.183	10.91.97.183
221	10.91.97.184/31	10.91.97.184 – 10.91.97.185	10.91.97.185
222	10.91.97.186/31	10.91.97.186 – 10.91.97.187	10.91.97.187
223	10.91.97.188/31	10.91.97.188 – 10.91.97.189	10.91.97.189
224	10.91.97.190/31	10.91.97.190 – 10.91.97.191	10.91.97.191
225	10.91.97.192/31	10.91.97.192 – 10.91.97.193	10.91.97.193
226	10.91.97.194/31	10.91.97.194 – 10.91.97.195	10.91.97.195
227	10.91.97.196/31	10.91.97.196 – 10.91.97.197	10.91.97.197
228	10.91.97.198/31	10.91.97.198 – 10.91.97.199	10.91.97.199
229	10.91.97.200/31	10.91.97.200 – 10.91.97.201	10.91.97.201
230	10.91.97.202/31	10.91.97.202 – 10.91.97.203	10.91.97.203
231	10.91.97.204/31	10.91.97.204 – 10.91.97.205	10.91.97.205
232	10.91.97.206/31	10.91.97.206 – 10.91.97.207	10.91.97.207
233	10.91.97.208/31	10.91.97.208 – 10.91.97.209	10.91.97.209
234	10.91.97.210/31	10.91.97.210 – 10.91.97.211	10.91.97.211
235	10.91.97.212/31	10.91.97.212 – 10.91.97.213	10.91.97.213
236	10.91.97.214/31	10.91.97.214 – 10.91.97.215	10.91.97.215
237	10.91.97.216/31	10.91.97.216 – 10.91.97.217	10.91.97.217
238	10.91.97.218/31	10.91.97.218 – 10.91.97.219	10.91.97.219
239	10.91.97.220/31	10.91.97.220 – 10.91.97.221	10.91.97.221
240	10.91.97.222/31	10.91.97.222 – 10.91.97.223	10.91.97.223
241	10.91.97.224/31	10.91.97.224 – 10.91.97.225	10.91.97.225
242	10.91.97.226/31	10.91.97.226 – 10.91.97.227	10.91.97.227
243	10.91.97.228/31	10.91.97.228 – 10.91.97.229	10.91.97.229
244	10.91.97.230/31	10.91.97.230 – 10.91.97.231	10.91.97.231
245	10.91.97.232/31	10.91.97.232 – 10.91.97.233	10.91.97.233
246	10.91.97.234/31	10.91.97.234 – 10.91.97.235	10.91.97.235
247	10.91.97.236/31	10.91.97.236 – 10.91.97.237	10.91.97.237
248	10.91.97.238/31	10.91.97.238 – 10.91.97.239	10.91.97.239
249	10.91.97.240/31	10.91.97.240 – 10.91.97.241	10.91.97.241
250	10.91.97.242/31	10.91.97.242 – 10.91.97.243	10.91.97.243
251	10.91.97.244/31	10.91.97.244 – 10.91.97.245	10.91.97.245
252	10.91.97.246/31	10.91.97.246 – 10.91.97.247	10.91.97.247
253	10.91.97.248/31	10.91.97.248 – 10.91.97.249	10.91.97.249
254	10.91.97.250/31	10.91.97.250 – 10.91.97.251	10.91.97.251
255	10.91.97.252/31	10.91.97.252 – 10.91.97.253	10.91.97.253
256	10.91.97.254/31	10.91.97.254 – 10.91.97.255	10.91.97.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →