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)10.0.146.0/23

network10.0.146.0/23

broadcast10.0.147.255

first host10.0.146.1

last host10.0.147.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.146.0/23

address00001010.00000000.10010010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.10010010.00000000

broadcast00001010.00000000.10010011.11111111

green = network part, grey = host part

hex0x0a009200

decimal167809536

reverse dns0.146.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:9200

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.146.0/31	10.0.146.0 – 10.0.146.1	10.0.146.1
2	10.0.146.2/31	10.0.146.2 – 10.0.146.3	10.0.146.3
3	10.0.146.4/31	10.0.146.4 – 10.0.146.5	10.0.146.5
4	10.0.146.6/31	10.0.146.6 – 10.0.146.7	10.0.146.7
5	10.0.146.8/31	10.0.146.8 – 10.0.146.9	10.0.146.9
6	10.0.146.10/31	10.0.146.10 – 10.0.146.11	10.0.146.11
7	10.0.146.12/31	10.0.146.12 – 10.0.146.13	10.0.146.13
8	10.0.146.14/31	10.0.146.14 – 10.0.146.15	10.0.146.15
9	10.0.146.16/31	10.0.146.16 – 10.0.146.17	10.0.146.17
10	10.0.146.18/31	10.0.146.18 – 10.0.146.19	10.0.146.19
11	10.0.146.20/31	10.0.146.20 – 10.0.146.21	10.0.146.21
12	10.0.146.22/31	10.0.146.22 – 10.0.146.23	10.0.146.23
13	10.0.146.24/31	10.0.146.24 – 10.0.146.25	10.0.146.25
14	10.0.146.26/31	10.0.146.26 – 10.0.146.27	10.0.146.27
15	10.0.146.28/31	10.0.146.28 – 10.0.146.29	10.0.146.29
16	10.0.146.30/31	10.0.146.30 – 10.0.146.31	10.0.146.31
17	10.0.146.32/31	10.0.146.32 – 10.0.146.33	10.0.146.33
18	10.0.146.34/31	10.0.146.34 – 10.0.146.35	10.0.146.35
19	10.0.146.36/31	10.0.146.36 – 10.0.146.37	10.0.146.37
20	10.0.146.38/31	10.0.146.38 – 10.0.146.39	10.0.146.39
21	10.0.146.40/31	10.0.146.40 – 10.0.146.41	10.0.146.41
22	10.0.146.42/31	10.0.146.42 – 10.0.146.43	10.0.146.43
23	10.0.146.44/31	10.0.146.44 – 10.0.146.45	10.0.146.45
24	10.0.146.46/31	10.0.146.46 – 10.0.146.47	10.0.146.47
25	10.0.146.48/31	10.0.146.48 – 10.0.146.49	10.0.146.49
26	10.0.146.50/31	10.0.146.50 – 10.0.146.51	10.0.146.51
27	10.0.146.52/31	10.0.146.52 – 10.0.146.53	10.0.146.53
28	10.0.146.54/31	10.0.146.54 – 10.0.146.55	10.0.146.55
29	10.0.146.56/31	10.0.146.56 – 10.0.146.57	10.0.146.57
30	10.0.146.58/31	10.0.146.58 – 10.0.146.59	10.0.146.59
31	10.0.146.60/31	10.0.146.60 – 10.0.146.61	10.0.146.61
32	10.0.146.62/31	10.0.146.62 – 10.0.146.63	10.0.146.63
33	10.0.146.64/31	10.0.146.64 – 10.0.146.65	10.0.146.65
34	10.0.146.66/31	10.0.146.66 – 10.0.146.67	10.0.146.67
35	10.0.146.68/31	10.0.146.68 – 10.0.146.69	10.0.146.69
36	10.0.146.70/31	10.0.146.70 – 10.0.146.71	10.0.146.71
37	10.0.146.72/31	10.0.146.72 – 10.0.146.73	10.0.146.73
38	10.0.146.74/31	10.0.146.74 – 10.0.146.75	10.0.146.75
39	10.0.146.76/31	10.0.146.76 – 10.0.146.77	10.0.146.77
40	10.0.146.78/31	10.0.146.78 – 10.0.146.79	10.0.146.79
41	10.0.146.80/31	10.0.146.80 – 10.0.146.81	10.0.146.81
42	10.0.146.82/31	10.0.146.82 – 10.0.146.83	10.0.146.83
43	10.0.146.84/31	10.0.146.84 – 10.0.146.85	10.0.146.85
44	10.0.146.86/31	10.0.146.86 – 10.0.146.87	10.0.146.87
45	10.0.146.88/31	10.0.146.88 – 10.0.146.89	10.0.146.89
46	10.0.146.90/31	10.0.146.90 – 10.0.146.91	10.0.146.91
47	10.0.146.92/31	10.0.146.92 – 10.0.146.93	10.0.146.93
48	10.0.146.94/31	10.0.146.94 – 10.0.146.95	10.0.146.95
49	10.0.146.96/31	10.0.146.96 – 10.0.146.97	10.0.146.97
50	10.0.146.98/31	10.0.146.98 – 10.0.146.99	10.0.146.99
51	10.0.146.100/31	10.0.146.100 – 10.0.146.101	10.0.146.101
52	10.0.146.102/31	10.0.146.102 – 10.0.146.103	10.0.146.103
53	10.0.146.104/31	10.0.146.104 – 10.0.146.105	10.0.146.105
54	10.0.146.106/31	10.0.146.106 – 10.0.146.107	10.0.146.107
55	10.0.146.108/31	10.0.146.108 – 10.0.146.109	10.0.146.109
56	10.0.146.110/31	10.0.146.110 – 10.0.146.111	10.0.146.111
57	10.0.146.112/31	10.0.146.112 – 10.0.146.113	10.0.146.113
58	10.0.146.114/31	10.0.146.114 – 10.0.146.115	10.0.146.115
59	10.0.146.116/31	10.0.146.116 – 10.0.146.117	10.0.146.117
60	10.0.146.118/31	10.0.146.118 – 10.0.146.119	10.0.146.119
61	10.0.146.120/31	10.0.146.120 – 10.0.146.121	10.0.146.121
62	10.0.146.122/31	10.0.146.122 – 10.0.146.123	10.0.146.123
63	10.0.146.124/31	10.0.146.124 – 10.0.146.125	10.0.146.125
64	10.0.146.126/31	10.0.146.126 – 10.0.146.127	10.0.146.127
65	10.0.146.128/31	10.0.146.128 – 10.0.146.129	10.0.146.129
66	10.0.146.130/31	10.0.146.130 – 10.0.146.131	10.0.146.131
67	10.0.146.132/31	10.0.146.132 – 10.0.146.133	10.0.146.133
68	10.0.146.134/31	10.0.146.134 – 10.0.146.135	10.0.146.135
69	10.0.146.136/31	10.0.146.136 – 10.0.146.137	10.0.146.137
70	10.0.146.138/31	10.0.146.138 – 10.0.146.139	10.0.146.139
71	10.0.146.140/31	10.0.146.140 – 10.0.146.141	10.0.146.141
72	10.0.146.142/31	10.0.146.142 – 10.0.146.143	10.0.146.143
73	10.0.146.144/31	10.0.146.144 – 10.0.146.145	10.0.146.145
74	10.0.146.146/31	10.0.146.146 – 10.0.146.147	10.0.146.147
75	10.0.146.148/31	10.0.146.148 – 10.0.146.149	10.0.146.149
76	10.0.146.150/31	10.0.146.150 – 10.0.146.151	10.0.146.151
77	10.0.146.152/31	10.0.146.152 – 10.0.146.153	10.0.146.153
78	10.0.146.154/31	10.0.146.154 – 10.0.146.155	10.0.146.155
79	10.0.146.156/31	10.0.146.156 – 10.0.146.157	10.0.146.157
80	10.0.146.158/31	10.0.146.158 – 10.0.146.159	10.0.146.159
81	10.0.146.160/31	10.0.146.160 – 10.0.146.161	10.0.146.161
82	10.0.146.162/31	10.0.146.162 – 10.0.146.163	10.0.146.163
83	10.0.146.164/31	10.0.146.164 – 10.0.146.165	10.0.146.165
84	10.0.146.166/31	10.0.146.166 – 10.0.146.167	10.0.146.167
85	10.0.146.168/31	10.0.146.168 – 10.0.146.169	10.0.146.169
86	10.0.146.170/31	10.0.146.170 – 10.0.146.171	10.0.146.171
87	10.0.146.172/31	10.0.146.172 – 10.0.146.173	10.0.146.173
88	10.0.146.174/31	10.0.146.174 – 10.0.146.175	10.0.146.175
89	10.0.146.176/31	10.0.146.176 – 10.0.146.177	10.0.146.177
90	10.0.146.178/31	10.0.146.178 – 10.0.146.179	10.0.146.179
91	10.0.146.180/31	10.0.146.180 – 10.0.146.181	10.0.146.181
92	10.0.146.182/31	10.0.146.182 – 10.0.146.183	10.0.146.183
93	10.0.146.184/31	10.0.146.184 – 10.0.146.185	10.0.146.185
94	10.0.146.186/31	10.0.146.186 – 10.0.146.187	10.0.146.187
95	10.0.146.188/31	10.0.146.188 – 10.0.146.189	10.0.146.189
96	10.0.146.190/31	10.0.146.190 – 10.0.146.191	10.0.146.191
97	10.0.146.192/31	10.0.146.192 – 10.0.146.193	10.0.146.193
98	10.0.146.194/31	10.0.146.194 – 10.0.146.195	10.0.146.195
99	10.0.146.196/31	10.0.146.196 – 10.0.146.197	10.0.146.197
100	10.0.146.198/31	10.0.146.198 – 10.0.146.199	10.0.146.199
101	10.0.146.200/31	10.0.146.200 – 10.0.146.201	10.0.146.201
102	10.0.146.202/31	10.0.146.202 – 10.0.146.203	10.0.146.203
103	10.0.146.204/31	10.0.146.204 – 10.0.146.205	10.0.146.205
104	10.0.146.206/31	10.0.146.206 – 10.0.146.207	10.0.146.207
105	10.0.146.208/31	10.0.146.208 – 10.0.146.209	10.0.146.209
106	10.0.146.210/31	10.0.146.210 – 10.0.146.211	10.0.146.211
107	10.0.146.212/31	10.0.146.212 – 10.0.146.213	10.0.146.213
108	10.0.146.214/31	10.0.146.214 – 10.0.146.215	10.0.146.215
109	10.0.146.216/31	10.0.146.216 – 10.0.146.217	10.0.146.217
110	10.0.146.218/31	10.0.146.218 – 10.0.146.219	10.0.146.219
111	10.0.146.220/31	10.0.146.220 – 10.0.146.221	10.0.146.221
112	10.0.146.222/31	10.0.146.222 – 10.0.146.223	10.0.146.223
113	10.0.146.224/31	10.0.146.224 – 10.0.146.225	10.0.146.225
114	10.0.146.226/31	10.0.146.226 – 10.0.146.227	10.0.146.227
115	10.0.146.228/31	10.0.146.228 – 10.0.146.229	10.0.146.229
116	10.0.146.230/31	10.0.146.230 – 10.0.146.231	10.0.146.231
117	10.0.146.232/31	10.0.146.232 – 10.0.146.233	10.0.146.233
118	10.0.146.234/31	10.0.146.234 – 10.0.146.235	10.0.146.235
119	10.0.146.236/31	10.0.146.236 – 10.0.146.237	10.0.146.237
120	10.0.146.238/31	10.0.146.238 – 10.0.146.239	10.0.146.239
121	10.0.146.240/31	10.0.146.240 – 10.0.146.241	10.0.146.241
122	10.0.146.242/31	10.0.146.242 – 10.0.146.243	10.0.146.243
123	10.0.146.244/31	10.0.146.244 – 10.0.146.245	10.0.146.245
124	10.0.146.246/31	10.0.146.246 – 10.0.146.247	10.0.146.247
125	10.0.146.248/31	10.0.146.248 – 10.0.146.249	10.0.146.249
126	10.0.146.250/31	10.0.146.250 – 10.0.146.251	10.0.146.251
127	10.0.146.252/31	10.0.146.252 – 10.0.146.253	10.0.146.253
128	10.0.146.254/31	10.0.146.254 – 10.0.146.255	10.0.146.255
129	10.0.147.0/31	10.0.147.0 – 10.0.147.1	10.0.147.1
130	10.0.147.2/31	10.0.147.2 – 10.0.147.3	10.0.147.3
131	10.0.147.4/31	10.0.147.4 – 10.0.147.5	10.0.147.5
132	10.0.147.6/31	10.0.147.6 – 10.0.147.7	10.0.147.7
133	10.0.147.8/31	10.0.147.8 – 10.0.147.9	10.0.147.9
134	10.0.147.10/31	10.0.147.10 – 10.0.147.11	10.0.147.11
135	10.0.147.12/31	10.0.147.12 – 10.0.147.13	10.0.147.13
136	10.0.147.14/31	10.0.147.14 – 10.0.147.15	10.0.147.15
137	10.0.147.16/31	10.0.147.16 – 10.0.147.17	10.0.147.17
138	10.0.147.18/31	10.0.147.18 – 10.0.147.19	10.0.147.19
139	10.0.147.20/31	10.0.147.20 – 10.0.147.21	10.0.147.21
140	10.0.147.22/31	10.0.147.22 – 10.0.147.23	10.0.147.23
141	10.0.147.24/31	10.0.147.24 – 10.0.147.25	10.0.147.25
142	10.0.147.26/31	10.0.147.26 – 10.0.147.27	10.0.147.27
143	10.0.147.28/31	10.0.147.28 – 10.0.147.29	10.0.147.29
144	10.0.147.30/31	10.0.147.30 – 10.0.147.31	10.0.147.31
145	10.0.147.32/31	10.0.147.32 – 10.0.147.33	10.0.147.33
146	10.0.147.34/31	10.0.147.34 – 10.0.147.35	10.0.147.35
147	10.0.147.36/31	10.0.147.36 – 10.0.147.37	10.0.147.37
148	10.0.147.38/31	10.0.147.38 – 10.0.147.39	10.0.147.39
149	10.0.147.40/31	10.0.147.40 – 10.0.147.41	10.0.147.41
150	10.0.147.42/31	10.0.147.42 – 10.0.147.43	10.0.147.43
151	10.0.147.44/31	10.0.147.44 – 10.0.147.45	10.0.147.45
152	10.0.147.46/31	10.0.147.46 – 10.0.147.47	10.0.147.47
153	10.0.147.48/31	10.0.147.48 – 10.0.147.49	10.0.147.49
154	10.0.147.50/31	10.0.147.50 – 10.0.147.51	10.0.147.51
155	10.0.147.52/31	10.0.147.52 – 10.0.147.53	10.0.147.53
156	10.0.147.54/31	10.0.147.54 – 10.0.147.55	10.0.147.55
157	10.0.147.56/31	10.0.147.56 – 10.0.147.57	10.0.147.57
158	10.0.147.58/31	10.0.147.58 – 10.0.147.59	10.0.147.59
159	10.0.147.60/31	10.0.147.60 – 10.0.147.61	10.0.147.61
160	10.0.147.62/31	10.0.147.62 – 10.0.147.63	10.0.147.63
161	10.0.147.64/31	10.0.147.64 – 10.0.147.65	10.0.147.65
162	10.0.147.66/31	10.0.147.66 – 10.0.147.67	10.0.147.67
163	10.0.147.68/31	10.0.147.68 – 10.0.147.69	10.0.147.69
164	10.0.147.70/31	10.0.147.70 – 10.0.147.71	10.0.147.71
165	10.0.147.72/31	10.0.147.72 – 10.0.147.73	10.0.147.73
166	10.0.147.74/31	10.0.147.74 – 10.0.147.75	10.0.147.75
167	10.0.147.76/31	10.0.147.76 – 10.0.147.77	10.0.147.77
168	10.0.147.78/31	10.0.147.78 – 10.0.147.79	10.0.147.79
169	10.0.147.80/31	10.0.147.80 – 10.0.147.81	10.0.147.81
170	10.0.147.82/31	10.0.147.82 – 10.0.147.83	10.0.147.83
171	10.0.147.84/31	10.0.147.84 – 10.0.147.85	10.0.147.85
172	10.0.147.86/31	10.0.147.86 – 10.0.147.87	10.0.147.87
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174	10.0.147.90/31	10.0.147.90 – 10.0.147.91	10.0.147.91
175	10.0.147.92/31	10.0.147.92 – 10.0.147.93	10.0.147.93
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181	10.0.147.104/31	10.0.147.104 – 10.0.147.105	10.0.147.105
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187	10.0.147.116/31	10.0.147.116 – 10.0.147.117	10.0.147.117
188	10.0.147.118/31	10.0.147.118 – 10.0.147.119	10.0.147.119
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193	10.0.147.128/31	10.0.147.128 – 10.0.147.129	10.0.147.129
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197	10.0.147.136/31	10.0.147.136 – 10.0.147.137	10.0.147.137
198	10.0.147.138/31	10.0.147.138 – 10.0.147.139	10.0.147.139
199	10.0.147.140/31	10.0.147.140 – 10.0.147.141	10.0.147.141
200	10.0.147.142/31	10.0.147.142 – 10.0.147.143	10.0.147.143
201	10.0.147.144/31	10.0.147.144 – 10.0.147.145	10.0.147.145
202	10.0.147.146/31	10.0.147.146 – 10.0.147.147	10.0.147.147
203	10.0.147.148/31	10.0.147.148 – 10.0.147.149	10.0.147.149
204	10.0.147.150/31	10.0.147.150 – 10.0.147.151	10.0.147.151
205	10.0.147.152/31	10.0.147.152 – 10.0.147.153	10.0.147.153
206	10.0.147.154/31	10.0.147.154 – 10.0.147.155	10.0.147.155
207	10.0.147.156/31	10.0.147.156 – 10.0.147.157	10.0.147.157
208	10.0.147.158/31	10.0.147.158 – 10.0.147.159	10.0.147.159
209	10.0.147.160/31	10.0.147.160 – 10.0.147.161	10.0.147.161
210	10.0.147.162/31	10.0.147.162 – 10.0.147.163	10.0.147.163
211	10.0.147.164/31	10.0.147.164 – 10.0.147.165	10.0.147.165
212	10.0.147.166/31	10.0.147.166 – 10.0.147.167	10.0.147.167
213	10.0.147.168/31	10.0.147.168 – 10.0.147.169	10.0.147.169
214	10.0.147.170/31	10.0.147.170 – 10.0.147.171	10.0.147.171
215	10.0.147.172/31	10.0.147.172 – 10.0.147.173	10.0.147.173
216	10.0.147.174/31	10.0.147.174 – 10.0.147.175	10.0.147.175
217	10.0.147.176/31	10.0.147.176 – 10.0.147.177	10.0.147.177
218	10.0.147.178/31	10.0.147.178 – 10.0.147.179	10.0.147.179
219	10.0.147.180/31	10.0.147.180 – 10.0.147.181	10.0.147.181
220	10.0.147.182/31	10.0.147.182 – 10.0.147.183	10.0.147.183
221	10.0.147.184/31	10.0.147.184 – 10.0.147.185	10.0.147.185
222	10.0.147.186/31	10.0.147.186 – 10.0.147.187	10.0.147.187
223	10.0.147.188/31	10.0.147.188 – 10.0.147.189	10.0.147.189
224	10.0.147.190/31	10.0.147.190 – 10.0.147.191	10.0.147.191
225	10.0.147.192/31	10.0.147.192 – 10.0.147.193	10.0.147.193
226	10.0.147.194/31	10.0.147.194 – 10.0.147.195	10.0.147.195
227	10.0.147.196/31	10.0.147.196 – 10.0.147.197	10.0.147.197
228	10.0.147.198/31	10.0.147.198 – 10.0.147.199	10.0.147.199
229	10.0.147.200/31	10.0.147.200 – 10.0.147.201	10.0.147.201
230	10.0.147.202/31	10.0.147.202 – 10.0.147.203	10.0.147.203
231	10.0.147.204/31	10.0.147.204 – 10.0.147.205	10.0.147.205
232	10.0.147.206/31	10.0.147.206 – 10.0.147.207	10.0.147.207
233	10.0.147.208/31	10.0.147.208 – 10.0.147.209	10.0.147.209
234	10.0.147.210/31	10.0.147.210 – 10.0.147.211	10.0.147.211
235	10.0.147.212/31	10.0.147.212 – 10.0.147.213	10.0.147.213
236	10.0.147.214/31	10.0.147.214 – 10.0.147.215	10.0.147.215
237	10.0.147.216/31	10.0.147.216 – 10.0.147.217	10.0.147.217
238	10.0.147.218/31	10.0.147.218 – 10.0.147.219	10.0.147.219
239	10.0.147.220/31	10.0.147.220 – 10.0.147.221	10.0.147.221
240	10.0.147.222/31	10.0.147.222 – 10.0.147.223	10.0.147.223
241	10.0.147.224/31	10.0.147.224 – 10.0.147.225	10.0.147.225
242	10.0.147.226/31	10.0.147.226 – 10.0.147.227	10.0.147.227
243	10.0.147.228/31	10.0.147.228 – 10.0.147.229	10.0.147.229
244	10.0.147.230/31	10.0.147.230 – 10.0.147.231	10.0.147.231
245	10.0.147.232/31	10.0.147.232 – 10.0.147.233	10.0.147.233
246	10.0.147.234/31	10.0.147.234 – 10.0.147.235	10.0.147.235
247	10.0.147.236/31	10.0.147.236 – 10.0.147.237	10.0.147.237
248	10.0.147.238/31	10.0.147.238 – 10.0.147.239	10.0.147.239
249	10.0.147.240/31	10.0.147.240 – 10.0.147.241	10.0.147.241
250	10.0.147.242/31	10.0.147.242 – 10.0.147.243	10.0.147.243
251	10.0.147.244/31	10.0.147.244 – 10.0.147.245	10.0.147.245
252	10.0.147.246/31	10.0.147.246 – 10.0.147.247	10.0.147.247
253	10.0.147.248/31	10.0.147.248 – 10.0.147.249	10.0.147.249
254	10.0.147.250/31	10.0.147.250 – 10.0.147.251	10.0.147.251
255	10.0.147.252/31	10.0.147.252 – 10.0.147.253	10.0.147.253
256	10.0.147.254/31	10.0.147.254 – 10.0.147.255	10.0.147.255

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 →