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)10.71.182.0/23

network10.71.182.0/23

broadcast10.71.183.255

first host10.71.182.1

last host10.71.183.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.71.182.0/23

address00001010.01000111.10110110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01000111.10110110.00000000

broadcast00001010.01000111.10110111.11111111

green = network part, grey = host part

hex0x0a47b600

decimal172471808

reverse dns0.182.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:b600

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.182.0/31	10.71.182.0 – 10.71.182.1	10.71.182.1
2	10.71.182.2/31	10.71.182.2 – 10.71.182.3	10.71.182.3
3	10.71.182.4/31	10.71.182.4 – 10.71.182.5	10.71.182.5
4	10.71.182.6/31	10.71.182.6 – 10.71.182.7	10.71.182.7
5	10.71.182.8/31	10.71.182.8 – 10.71.182.9	10.71.182.9
6	10.71.182.10/31	10.71.182.10 – 10.71.182.11	10.71.182.11
7	10.71.182.12/31	10.71.182.12 – 10.71.182.13	10.71.182.13
8	10.71.182.14/31	10.71.182.14 – 10.71.182.15	10.71.182.15
9	10.71.182.16/31	10.71.182.16 – 10.71.182.17	10.71.182.17
10	10.71.182.18/31	10.71.182.18 – 10.71.182.19	10.71.182.19
11	10.71.182.20/31	10.71.182.20 – 10.71.182.21	10.71.182.21
12	10.71.182.22/31	10.71.182.22 – 10.71.182.23	10.71.182.23
13	10.71.182.24/31	10.71.182.24 – 10.71.182.25	10.71.182.25
14	10.71.182.26/31	10.71.182.26 – 10.71.182.27	10.71.182.27
15	10.71.182.28/31	10.71.182.28 – 10.71.182.29	10.71.182.29
16	10.71.182.30/31	10.71.182.30 – 10.71.182.31	10.71.182.31
17	10.71.182.32/31	10.71.182.32 – 10.71.182.33	10.71.182.33
18	10.71.182.34/31	10.71.182.34 – 10.71.182.35	10.71.182.35
19	10.71.182.36/31	10.71.182.36 – 10.71.182.37	10.71.182.37
20	10.71.182.38/31	10.71.182.38 – 10.71.182.39	10.71.182.39
21	10.71.182.40/31	10.71.182.40 – 10.71.182.41	10.71.182.41
22	10.71.182.42/31	10.71.182.42 – 10.71.182.43	10.71.182.43
23	10.71.182.44/31	10.71.182.44 – 10.71.182.45	10.71.182.45
24	10.71.182.46/31	10.71.182.46 – 10.71.182.47	10.71.182.47
25	10.71.182.48/31	10.71.182.48 – 10.71.182.49	10.71.182.49
26	10.71.182.50/31	10.71.182.50 – 10.71.182.51	10.71.182.51
27	10.71.182.52/31	10.71.182.52 – 10.71.182.53	10.71.182.53
28	10.71.182.54/31	10.71.182.54 – 10.71.182.55	10.71.182.55
29	10.71.182.56/31	10.71.182.56 – 10.71.182.57	10.71.182.57
30	10.71.182.58/31	10.71.182.58 – 10.71.182.59	10.71.182.59
31	10.71.182.60/31	10.71.182.60 – 10.71.182.61	10.71.182.61
32	10.71.182.62/31	10.71.182.62 – 10.71.182.63	10.71.182.63
33	10.71.182.64/31	10.71.182.64 – 10.71.182.65	10.71.182.65
34	10.71.182.66/31	10.71.182.66 – 10.71.182.67	10.71.182.67
35	10.71.182.68/31	10.71.182.68 – 10.71.182.69	10.71.182.69
36	10.71.182.70/31	10.71.182.70 – 10.71.182.71	10.71.182.71
37	10.71.182.72/31	10.71.182.72 – 10.71.182.73	10.71.182.73
38	10.71.182.74/31	10.71.182.74 – 10.71.182.75	10.71.182.75
39	10.71.182.76/31	10.71.182.76 – 10.71.182.77	10.71.182.77
40	10.71.182.78/31	10.71.182.78 – 10.71.182.79	10.71.182.79
41	10.71.182.80/31	10.71.182.80 – 10.71.182.81	10.71.182.81
42	10.71.182.82/31	10.71.182.82 – 10.71.182.83	10.71.182.83
43	10.71.182.84/31	10.71.182.84 – 10.71.182.85	10.71.182.85
44	10.71.182.86/31	10.71.182.86 – 10.71.182.87	10.71.182.87
45	10.71.182.88/31	10.71.182.88 – 10.71.182.89	10.71.182.89
46	10.71.182.90/31	10.71.182.90 – 10.71.182.91	10.71.182.91
47	10.71.182.92/31	10.71.182.92 – 10.71.182.93	10.71.182.93
48	10.71.182.94/31	10.71.182.94 – 10.71.182.95	10.71.182.95
49	10.71.182.96/31	10.71.182.96 – 10.71.182.97	10.71.182.97
50	10.71.182.98/31	10.71.182.98 – 10.71.182.99	10.71.182.99
51	10.71.182.100/31	10.71.182.100 – 10.71.182.101	10.71.182.101
52	10.71.182.102/31	10.71.182.102 – 10.71.182.103	10.71.182.103
53	10.71.182.104/31	10.71.182.104 – 10.71.182.105	10.71.182.105
54	10.71.182.106/31	10.71.182.106 – 10.71.182.107	10.71.182.107
55	10.71.182.108/31	10.71.182.108 – 10.71.182.109	10.71.182.109
56	10.71.182.110/31	10.71.182.110 – 10.71.182.111	10.71.182.111
57	10.71.182.112/31	10.71.182.112 – 10.71.182.113	10.71.182.113
58	10.71.182.114/31	10.71.182.114 – 10.71.182.115	10.71.182.115
59	10.71.182.116/31	10.71.182.116 – 10.71.182.117	10.71.182.117
60	10.71.182.118/31	10.71.182.118 – 10.71.182.119	10.71.182.119
61	10.71.182.120/31	10.71.182.120 – 10.71.182.121	10.71.182.121
62	10.71.182.122/31	10.71.182.122 – 10.71.182.123	10.71.182.123
63	10.71.182.124/31	10.71.182.124 – 10.71.182.125	10.71.182.125
64	10.71.182.126/31	10.71.182.126 – 10.71.182.127	10.71.182.127
65	10.71.182.128/31	10.71.182.128 – 10.71.182.129	10.71.182.129
66	10.71.182.130/31	10.71.182.130 – 10.71.182.131	10.71.182.131
67	10.71.182.132/31	10.71.182.132 – 10.71.182.133	10.71.182.133
68	10.71.182.134/31	10.71.182.134 – 10.71.182.135	10.71.182.135
69	10.71.182.136/31	10.71.182.136 – 10.71.182.137	10.71.182.137
70	10.71.182.138/31	10.71.182.138 – 10.71.182.139	10.71.182.139
71	10.71.182.140/31	10.71.182.140 – 10.71.182.141	10.71.182.141
72	10.71.182.142/31	10.71.182.142 – 10.71.182.143	10.71.182.143
73	10.71.182.144/31	10.71.182.144 – 10.71.182.145	10.71.182.145
74	10.71.182.146/31	10.71.182.146 – 10.71.182.147	10.71.182.147
75	10.71.182.148/31	10.71.182.148 – 10.71.182.149	10.71.182.149
76	10.71.182.150/31	10.71.182.150 – 10.71.182.151	10.71.182.151
77	10.71.182.152/31	10.71.182.152 – 10.71.182.153	10.71.182.153
78	10.71.182.154/31	10.71.182.154 – 10.71.182.155	10.71.182.155
79	10.71.182.156/31	10.71.182.156 – 10.71.182.157	10.71.182.157
80	10.71.182.158/31	10.71.182.158 – 10.71.182.159	10.71.182.159
81	10.71.182.160/31	10.71.182.160 – 10.71.182.161	10.71.182.161
82	10.71.182.162/31	10.71.182.162 – 10.71.182.163	10.71.182.163
83	10.71.182.164/31	10.71.182.164 – 10.71.182.165	10.71.182.165
84	10.71.182.166/31	10.71.182.166 – 10.71.182.167	10.71.182.167
85	10.71.182.168/31	10.71.182.168 – 10.71.182.169	10.71.182.169
86	10.71.182.170/31	10.71.182.170 – 10.71.182.171	10.71.182.171
87	10.71.182.172/31	10.71.182.172 – 10.71.182.173	10.71.182.173
88	10.71.182.174/31	10.71.182.174 – 10.71.182.175	10.71.182.175
89	10.71.182.176/31	10.71.182.176 – 10.71.182.177	10.71.182.177
90	10.71.182.178/31	10.71.182.178 – 10.71.182.179	10.71.182.179
91	10.71.182.180/31	10.71.182.180 – 10.71.182.181	10.71.182.181
92	10.71.182.182/31	10.71.182.182 – 10.71.182.183	10.71.182.183
93	10.71.182.184/31	10.71.182.184 – 10.71.182.185	10.71.182.185
94	10.71.182.186/31	10.71.182.186 – 10.71.182.187	10.71.182.187
95	10.71.182.188/31	10.71.182.188 – 10.71.182.189	10.71.182.189
96	10.71.182.190/31	10.71.182.190 – 10.71.182.191	10.71.182.191
97	10.71.182.192/31	10.71.182.192 – 10.71.182.193	10.71.182.193
98	10.71.182.194/31	10.71.182.194 – 10.71.182.195	10.71.182.195
99	10.71.182.196/31	10.71.182.196 – 10.71.182.197	10.71.182.197
100	10.71.182.198/31	10.71.182.198 – 10.71.182.199	10.71.182.199
101	10.71.182.200/31	10.71.182.200 – 10.71.182.201	10.71.182.201
102	10.71.182.202/31	10.71.182.202 – 10.71.182.203	10.71.182.203
103	10.71.182.204/31	10.71.182.204 – 10.71.182.205	10.71.182.205
104	10.71.182.206/31	10.71.182.206 – 10.71.182.207	10.71.182.207
105	10.71.182.208/31	10.71.182.208 – 10.71.182.209	10.71.182.209
106	10.71.182.210/31	10.71.182.210 – 10.71.182.211	10.71.182.211
107	10.71.182.212/31	10.71.182.212 – 10.71.182.213	10.71.182.213
108	10.71.182.214/31	10.71.182.214 – 10.71.182.215	10.71.182.215
109	10.71.182.216/31	10.71.182.216 – 10.71.182.217	10.71.182.217
110	10.71.182.218/31	10.71.182.218 – 10.71.182.219	10.71.182.219
111	10.71.182.220/31	10.71.182.220 – 10.71.182.221	10.71.182.221
112	10.71.182.222/31	10.71.182.222 – 10.71.182.223	10.71.182.223
113	10.71.182.224/31	10.71.182.224 – 10.71.182.225	10.71.182.225
114	10.71.182.226/31	10.71.182.226 – 10.71.182.227	10.71.182.227
115	10.71.182.228/31	10.71.182.228 – 10.71.182.229	10.71.182.229
116	10.71.182.230/31	10.71.182.230 – 10.71.182.231	10.71.182.231
117	10.71.182.232/31	10.71.182.232 – 10.71.182.233	10.71.182.233
118	10.71.182.234/31	10.71.182.234 – 10.71.182.235	10.71.182.235
119	10.71.182.236/31	10.71.182.236 – 10.71.182.237	10.71.182.237
120	10.71.182.238/31	10.71.182.238 – 10.71.182.239	10.71.182.239
121	10.71.182.240/31	10.71.182.240 – 10.71.182.241	10.71.182.241
122	10.71.182.242/31	10.71.182.242 – 10.71.182.243	10.71.182.243
123	10.71.182.244/31	10.71.182.244 – 10.71.182.245	10.71.182.245
124	10.71.182.246/31	10.71.182.246 – 10.71.182.247	10.71.182.247
125	10.71.182.248/31	10.71.182.248 – 10.71.182.249	10.71.182.249
126	10.71.182.250/31	10.71.182.250 – 10.71.182.251	10.71.182.251
127	10.71.182.252/31	10.71.182.252 – 10.71.182.253	10.71.182.253
128	10.71.182.254/31	10.71.182.254 – 10.71.182.255	10.71.182.255
129	10.71.183.0/31	10.71.183.0 – 10.71.183.1	10.71.183.1
130	10.71.183.2/31	10.71.183.2 – 10.71.183.3	10.71.183.3
131	10.71.183.4/31	10.71.183.4 – 10.71.183.5	10.71.183.5
132	10.71.183.6/31	10.71.183.6 – 10.71.183.7	10.71.183.7
133	10.71.183.8/31	10.71.183.8 – 10.71.183.9	10.71.183.9
134	10.71.183.10/31	10.71.183.10 – 10.71.183.11	10.71.183.11
135	10.71.183.12/31	10.71.183.12 – 10.71.183.13	10.71.183.13
136	10.71.183.14/31	10.71.183.14 – 10.71.183.15	10.71.183.15
137	10.71.183.16/31	10.71.183.16 – 10.71.183.17	10.71.183.17
138	10.71.183.18/31	10.71.183.18 – 10.71.183.19	10.71.183.19
139	10.71.183.20/31	10.71.183.20 – 10.71.183.21	10.71.183.21
140	10.71.183.22/31	10.71.183.22 – 10.71.183.23	10.71.183.23
141	10.71.183.24/31	10.71.183.24 – 10.71.183.25	10.71.183.25
142	10.71.183.26/31	10.71.183.26 – 10.71.183.27	10.71.183.27
143	10.71.183.28/31	10.71.183.28 – 10.71.183.29	10.71.183.29
144	10.71.183.30/31	10.71.183.30 – 10.71.183.31	10.71.183.31
145	10.71.183.32/31	10.71.183.32 – 10.71.183.33	10.71.183.33
146	10.71.183.34/31	10.71.183.34 – 10.71.183.35	10.71.183.35
147	10.71.183.36/31	10.71.183.36 – 10.71.183.37	10.71.183.37
148	10.71.183.38/31	10.71.183.38 – 10.71.183.39	10.71.183.39
149	10.71.183.40/31	10.71.183.40 – 10.71.183.41	10.71.183.41
150	10.71.183.42/31	10.71.183.42 – 10.71.183.43	10.71.183.43
151	10.71.183.44/31	10.71.183.44 – 10.71.183.45	10.71.183.45
152	10.71.183.46/31	10.71.183.46 – 10.71.183.47	10.71.183.47
153	10.71.183.48/31	10.71.183.48 – 10.71.183.49	10.71.183.49
154	10.71.183.50/31	10.71.183.50 – 10.71.183.51	10.71.183.51
155	10.71.183.52/31	10.71.183.52 – 10.71.183.53	10.71.183.53
156	10.71.183.54/31	10.71.183.54 – 10.71.183.55	10.71.183.55
157	10.71.183.56/31	10.71.183.56 – 10.71.183.57	10.71.183.57
158	10.71.183.58/31	10.71.183.58 – 10.71.183.59	10.71.183.59
159	10.71.183.60/31	10.71.183.60 – 10.71.183.61	10.71.183.61
160	10.71.183.62/31	10.71.183.62 – 10.71.183.63	10.71.183.63
161	10.71.183.64/31	10.71.183.64 – 10.71.183.65	10.71.183.65
162	10.71.183.66/31	10.71.183.66 – 10.71.183.67	10.71.183.67
163	10.71.183.68/31	10.71.183.68 – 10.71.183.69	10.71.183.69
164	10.71.183.70/31	10.71.183.70 – 10.71.183.71	10.71.183.71
165	10.71.183.72/31	10.71.183.72 – 10.71.183.73	10.71.183.73
166	10.71.183.74/31	10.71.183.74 – 10.71.183.75	10.71.183.75
167	10.71.183.76/31	10.71.183.76 – 10.71.183.77	10.71.183.77
168	10.71.183.78/31	10.71.183.78 – 10.71.183.79	10.71.183.79
169	10.71.183.80/31	10.71.183.80 – 10.71.183.81	10.71.183.81
170	10.71.183.82/31	10.71.183.82 – 10.71.183.83	10.71.183.83
171	10.71.183.84/31	10.71.183.84 – 10.71.183.85	10.71.183.85
172	10.71.183.86/31	10.71.183.86 – 10.71.183.87	10.71.183.87
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175	10.71.183.92/31	10.71.183.92 – 10.71.183.93	10.71.183.93
176	10.71.183.94/31	10.71.183.94 – 10.71.183.95	10.71.183.95
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181	10.71.183.104/31	10.71.183.104 – 10.71.183.105	10.71.183.105
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197	10.71.183.136/31	10.71.183.136 – 10.71.183.137	10.71.183.137
198	10.71.183.138/31	10.71.183.138 – 10.71.183.139	10.71.183.139
199	10.71.183.140/31	10.71.183.140 – 10.71.183.141	10.71.183.141
200	10.71.183.142/31	10.71.183.142 – 10.71.183.143	10.71.183.143
201	10.71.183.144/31	10.71.183.144 – 10.71.183.145	10.71.183.145
202	10.71.183.146/31	10.71.183.146 – 10.71.183.147	10.71.183.147
203	10.71.183.148/31	10.71.183.148 – 10.71.183.149	10.71.183.149
204	10.71.183.150/31	10.71.183.150 – 10.71.183.151	10.71.183.151
205	10.71.183.152/31	10.71.183.152 – 10.71.183.153	10.71.183.153
206	10.71.183.154/31	10.71.183.154 – 10.71.183.155	10.71.183.155
207	10.71.183.156/31	10.71.183.156 – 10.71.183.157	10.71.183.157
208	10.71.183.158/31	10.71.183.158 – 10.71.183.159	10.71.183.159
209	10.71.183.160/31	10.71.183.160 – 10.71.183.161	10.71.183.161
210	10.71.183.162/31	10.71.183.162 – 10.71.183.163	10.71.183.163
211	10.71.183.164/31	10.71.183.164 – 10.71.183.165	10.71.183.165
212	10.71.183.166/31	10.71.183.166 – 10.71.183.167	10.71.183.167
213	10.71.183.168/31	10.71.183.168 – 10.71.183.169	10.71.183.169
214	10.71.183.170/31	10.71.183.170 – 10.71.183.171	10.71.183.171
215	10.71.183.172/31	10.71.183.172 – 10.71.183.173	10.71.183.173
216	10.71.183.174/31	10.71.183.174 – 10.71.183.175	10.71.183.175
217	10.71.183.176/31	10.71.183.176 – 10.71.183.177	10.71.183.177
218	10.71.183.178/31	10.71.183.178 – 10.71.183.179	10.71.183.179
219	10.71.183.180/31	10.71.183.180 – 10.71.183.181	10.71.183.181
220	10.71.183.182/31	10.71.183.182 – 10.71.183.183	10.71.183.183
221	10.71.183.184/31	10.71.183.184 – 10.71.183.185	10.71.183.185
222	10.71.183.186/31	10.71.183.186 – 10.71.183.187	10.71.183.187
223	10.71.183.188/31	10.71.183.188 – 10.71.183.189	10.71.183.189
224	10.71.183.190/31	10.71.183.190 – 10.71.183.191	10.71.183.191
225	10.71.183.192/31	10.71.183.192 – 10.71.183.193	10.71.183.193
226	10.71.183.194/31	10.71.183.194 – 10.71.183.195	10.71.183.195
227	10.71.183.196/31	10.71.183.196 – 10.71.183.197	10.71.183.197
228	10.71.183.198/31	10.71.183.198 – 10.71.183.199	10.71.183.199
229	10.71.183.200/31	10.71.183.200 – 10.71.183.201	10.71.183.201
230	10.71.183.202/31	10.71.183.202 – 10.71.183.203	10.71.183.203
231	10.71.183.204/31	10.71.183.204 – 10.71.183.205	10.71.183.205
232	10.71.183.206/31	10.71.183.206 – 10.71.183.207	10.71.183.207
233	10.71.183.208/31	10.71.183.208 – 10.71.183.209	10.71.183.209
234	10.71.183.210/31	10.71.183.210 – 10.71.183.211	10.71.183.211
235	10.71.183.212/31	10.71.183.212 – 10.71.183.213	10.71.183.213
236	10.71.183.214/31	10.71.183.214 – 10.71.183.215	10.71.183.215
237	10.71.183.216/31	10.71.183.216 – 10.71.183.217	10.71.183.217
238	10.71.183.218/31	10.71.183.218 – 10.71.183.219	10.71.183.219
239	10.71.183.220/31	10.71.183.220 – 10.71.183.221	10.71.183.221
240	10.71.183.222/31	10.71.183.222 – 10.71.183.223	10.71.183.223
241	10.71.183.224/31	10.71.183.224 – 10.71.183.225	10.71.183.225
242	10.71.183.226/31	10.71.183.226 – 10.71.183.227	10.71.183.227
243	10.71.183.228/31	10.71.183.228 – 10.71.183.229	10.71.183.229
244	10.71.183.230/31	10.71.183.230 – 10.71.183.231	10.71.183.231
245	10.71.183.232/31	10.71.183.232 – 10.71.183.233	10.71.183.233
246	10.71.183.234/31	10.71.183.234 – 10.71.183.235	10.71.183.235
247	10.71.183.236/31	10.71.183.236 – 10.71.183.237	10.71.183.237
248	10.71.183.238/31	10.71.183.238 – 10.71.183.239	10.71.183.239
249	10.71.183.240/31	10.71.183.240 – 10.71.183.241	10.71.183.241
250	10.71.183.242/31	10.71.183.242 – 10.71.183.243	10.71.183.243
251	10.71.183.244/31	10.71.183.244 – 10.71.183.245	10.71.183.245
252	10.71.183.246/31	10.71.183.246 – 10.71.183.247	10.71.183.247
253	10.71.183.248/31	10.71.183.248 – 10.71.183.249	10.71.183.249
254	10.71.183.250/31	10.71.183.250 – 10.71.183.251	10.71.183.251
255	10.71.183.252/31	10.71.183.252 – 10.71.183.253	10.71.183.253
256	10.71.183.254/31	10.71.183.254 – 10.71.183.255	10.71.183.255

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 →