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)10.64.34.0/23

network10.64.34.0/23

broadcast10.64.35.255

first host10.64.34.1

last host10.64.35.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.64.34.0/23

address00001010.01000000.00100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01000000.00100010.00000000

broadcast00001010.01000000.00100011.11111111

green = network part, grey = host part

hex0x0a402200

decimal171975168

reverse dns0.34.64.10.in-addr.arpa

ipv4-mapped::ffff:a40:2200

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.64.34.0/32	10.64.34.0 – 10.64.34.0	10.64.34.0
2	10.64.34.1/32	10.64.34.1 – 10.64.34.1	10.64.34.1
3	10.64.34.2/32	10.64.34.2 – 10.64.34.2	10.64.34.2
4	10.64.34.3/32	10.64.34.3 – 10.64.34.3	10.64.34.3
5	10.64.34.4/32	10.64.34.4 – 10.64.34.4	10.64.34.4
6	10.64.34.5/32	10.64.34.5 – 10.64.34.5	10.64.34.5
7	10.64.34.6/32	10.64.34.6 – 10.64.34.6	10.64.34.6
8	10.64.34.7/32	10.64.34.7 – 10.64.34.7	10.64.34.7
9	10.64.34.8/32	10.64.34.8 – 10.64.34.8	10.64.34.8
10	10.64.34.9/32	10.64.34.9 – 10.64.34.9	10.64.34.9
11	10.64.34.10/32	10.64.34.10 – 10.64.34.10	10.64.34.10
12	10.64.34.11/32	10.64.34.11 – 10.64.34.11	10.64.34.11
13	10.64.34.12/32	10.64.34.12 – 10.64.34.12	10.64.34.12
14	10.64.34.13/32	10.64.34.13 – 10.64.34.13	10.64.34.13
15	10.64.34.14/32	10.64.34.14 – 10.64.34.14	10.64.34.14
16	10.64.34.15/32	10.64.34.15 – 10.64.34.15	10.64.34.15
17	10.64.34.16/32	10.64.34.16 – 10.64.34.16	10.64.34.16
18	10.64.34.17/32	10.64.34.17 – 10.64.34.17	10.64.34.17
19	10.64.34.18/32	10.64.34.18 – 10.64.34.18	10.64.34.18
20	10.64.34.19/32	10.64.34.19 – 10.64.34.19	10.64.34.19
21	10.64.34.20/32	10.64.34.20 – 10.64.34.20	10.64.34.20
22	10.64.34.21/32	10.64.34.21 – 10.64.34.21	10.64.34.21
23	10.64.34.22/32	10.64.34.22 – 10.64.34.22	10.64.34.22
24	10.64.34.23/32	10.64.34.23 – 10.64.34.23	10.64.34.23
25	10.64.34.24/32	10.64.34.24 – 10.64.34.24	10.64.34.24
26	10.64.34.25/32	10.64.34.25 – 10.64.34.25	10.64.34.25
27	10.64.34.26/32	10.64.34.26 – 10.64.34.26	10.64.34.26
28	10.64.34.27/32	10.64.34.27 – 10.64.34.27	10.64.34.27
29	10.64.34.28/32	10.64.34.28 – 10.64.34.28	10.64.34.28
30	10.64.34.29/32	10.64.34.29 – 10.64.34.29	10.64.34.29
31	10.64.34.30/32	10.64.34.30 – 10.64.34.30	10.64.34.30
32	10.64.34.31/32	10.64.34.31 – 10.64.34.31	10.64.34.31
33	10.64.34.32/32	10.64.34.32 – 10.64.34.32	10.64.34.32
34	10.64.34.33/32	10.64.34.33 – 10.64.34.33	10.64.34.33
35	10.64.34.34/32	10.64.34.34 – 10.64.34.34	10.64.34.34
36	10.64.34.35/32	10.64.34.35 – 10.64.34.35	10.64.34.35
37	10.64.34.36/32	10.64.34.36 – 10.64.34.36	10.64.34.36
38	10.64.34.37/32	10.64.34.37 – 10.64.34.37	10.64.34.37
39	10.64.34.38/32	10.64.34.38 – 10.64.34.38	10.64.34.38
40	10.64.34.39/32	10.64.34.39 – 10.64.34.39	10.64.34.39
41	10.64.34.40/32	10.64.34.40 – 10.64.34.40	10.64.34.40
42	10.64.34.41/32	10.64.34.41 – 10.64.34.41	10.64.34.41
43	10.64.34.42/32	10.64.34.42 – 10.64.34.42	10.64.34.42
44	10.64.34.43/32	10.64.34.43 – 10.64.34.43	10.64.34.43
45	10.64.34.44/32	10.64.34.44 – 10.64.34.44	10.64.34.44
46	10.64.34.45/32	10.64.34.45 – 10.64.34.45	10.64.34.45
47	10.64.34.46/32	10.64.34.46 – 10.64.34.46	10.64.34.46
48	10.64.34.47/32	10.64.34.47 – 10.64.34.47	10.64.34.47
49	10.64.34.48/32	10.64.34.48 – 10.64.34.48	10.64.34.48
50	10.64.34.49/32	10.64.34.49 – 10.64.34.49	10.64.34.49
51	10.64.34.50/32	10.64.34.50 – 10.64.34.50	10.64.34.50
52	10.64.34.51/32	10.64.34.51 – 10.64.34.51	10.64.34.51
53	10.64.34.52/32	10.64.34.52 – 10.64.34.52	10.64.34.52
54	10.64.34.53/32	10.64.34.53 – 10.64.34.53	10.64.34.53
55	10.64.34.54/32	10.64.34.54 – 10.64.34.54	10.64.34.54
56	10.64.34.55/32	10.64.34.55 – 10.64.34.55	10.64.34.55
57	10.64.34.56/32	10.64.34.56 – 10.64.34.56	10.64.34.56
58	10.64.34.57/32	10.64.34.57 – 10.64.34.57	10.64.34.57
59	10.64.34.58/32	10.64.34.58 – 10.64.34.58	10.64.34.58
60	10.64.34.59/32	10.64.34.59 – 10.64.34.59	10.64.34.59
61	10.64.34.60/32	10.64.34.60 – 10.64.34.60	10.64.34.60
62	10.64.34.61/32	10.64.34.61 – 10.64.34.61	10.64.34.61
63	10.64.34.62/32	10.64.34.62 – 10.64.34.62	10.64.34.62
64	10.64.34.63/32	10.64.34.63 – 10.64.34.63	10.64.34.63
65	10.64.34.64/32	10.64.34.64 – 10.64.34.64	10.64.34.64
66	10.64.34.65/32	10.64.34.65 – 10.64.34.65	10.64.34.65
67	10.64.34.66/32	10.64.34.66 – 10.64.34.66	10.64.34.66
68	10.64.34.67/32	10.64.34.67 – 10.64.34.67	10.64.34.67
69	10.64.34.68/32	10.64.34.68 – 10.64.34.68	10.64.34.68
70	10.64.34.69/32	10.64.34.69 – 10.64.34.69	10.64.34.69
71	10.64.34.70/32	10.64.34.70 – 10.64.34.70	10.64.34.70
72	10.64.34.71/32	10.64.34.71 – 10.64.34.71	10.64.34.71
73	10.64.34.72/32	10.64.34.72 – 10.64.34.72	10.64.34.72
74	10.64.34.73/32	10.64.34.73 – 10.64.34.73	10.64.34.73
75	10.64.34.74/32	10.64.34.74 – 10.64.34.74	10.64.34.74
76	10.64.34.75/32	10.64.34.75 – 10.64.34.75	10.64.34.75
77	10.64.34.76/32	10.64.34.76 – 10.64.34.76	10.64.34.76
78	10.64.34.77/32	10.64.34.77 – 10.64.34.77	10.64.34.77
79	10.64.34.78/32	10.64.34.78 – 10.64.34.78	10.64.34.78
80	10.64.34.79/32	10.64.34.79 – 10.64.34.79	10.64.34.79
81	10.64.34.80/32	10.64.34.80 – 10.64.34.80	10.64.34.80
82	10.64.34.81/32	10.64.34.81 – 10.64.34.81	10.64.34.81
83	10.64.34.82/32	10.64.34.82 – 10.64.34.82	10.64.34.82
84	10.64.34.83/32	10.64.34.83 – 10.64.34.83	10.64.34.83
85	10.64.34.84/32	10.64.34.84 – 10.64.34.84	10.64.34.84
86	10.64.34.85/32	10.64.34.85 – 10.64.34.85	10.64.34.85
87	10.64.34.86/32	10.64.34.86 – 10.64.34.86	10.64.34.86
88	10.64.34.87/32	10.64.34.87 – 10.64.34.87	10.64.34.87
89	10.64.34.88/32	10.64.34.88 – 10.64.34.88	10.64.34.88
90	10.64.34.89/32	10.64.34.89 – 10.64.34.89	10.64.34.89
91	10.64.34.90/32	10.64.34.90 – 10.64.34.90	10.64.34.90
92	10.64.34.91/32	10.64.34.91 – 10.64.34.91	10.64.34.91
93	10.64.34.92/32	10.64.34.92 – 10.64.34.92	10.64.34.92
94	10.64.34.93/32	10.64.34.93 – 10.64.34.93	10.64.34.93
95	10.64.34.94/32	10.64.34.94 – 10.64.34.94	10.64.34.94
96	10.64.34.95/32	10.64.34.95 – 10.64.34.95	10.64.34.95
97	10.64.34.96/32	10.64.34.96 – 10.64.34.96	10.64.34.96
98	10.64.34.97/32	10.64.34.97 – 10.64.34.97	10.64.34.97
99	10.64.34.98/32	10.64.34.98 – 10.64.34.98	10.64.34.98
100	10.64.34.99/32	10.64.34.99 – 10.64.34.99	10.64.34.99
101	10.64.34.100/32	10.64.34.100 – 10.64.34.100	10.64.34.100
102	10.64.34.101/32	10.64.34.101 – 10.64.34.101	10.64.34.101
103	10.64.34.102/32	10.64.34.102 – 10.64.34.102	10.64.34.102
104	10.64.34.103/32	10.64.34.103 – 10.64.34.103	10.64.34.103
105	10.64.34.104/32	10.64.34.104 – 10.64.34.104	10.64.34.104
106	10.64.34.105/32	10.64.34.105 – 10.64.34.105	10.64.34.105
107	10.64.34.106/32	10.64.34.106 – 10.64.34.106	10.64.34.106
108	10.64.34.107/32	10.64.34.107 – 10.64.34.107	10.64.34.107
109	10.64.34.108/32	10.64.34.108 – 10.64.34.108	10.64.34.108
110	10.64.34.109/32	10.64.34.109 – 10.64.34.109	10.64.34.109
111	10.64.34.110/32	10.64.34.110 – 10.64.34.110	10.64.34.110
112	10.64.34.111/32	10.64.34.111 – 10.64.34.111	10.64.34.111
113	10.64.34.112/32	10.64.34.112 – 10.64.34.112	10.64.34.112
114	10.64.34.113/32	10.64.34.113 – 10.64.34.113	10.64.34.113
115	10.64.34.114/32	10.64.34.114 – 10.64.34.114	10.64.34.114
116	10.64.34.115/32	10.64.34.115 – 10.64.34.115	10.64.34.115
117	10.64.34.116/32	10.64.34.116 – 10.64.34.116	10.64.34.116
118	10.64.34.117/32	10.64.34.117 – 10.64.34.117	10.64.34.117
119	10.64.34.118/32	10.64.34.118 – 10.64.34.118	10.64.34.118
120	10.64.34.119/32	10.64.34.119 – 10.64.34.119	10.64.34.119
121	10.64.34.120/32	10.64.34.120 – 10.64.34.120	10.64.34.120
122	10.64.34.121/32	10.64.34.121 – 10.64.34.121	10.64.34.121
123	10.64.34.122/32	10.64.34.122 – 10.64.34.122	10.64.34.122
124	10.64.34.123/32	10.64.34.123 – 10.64.34.123	10.64.34.123
125	10.64.34.124/32	10.64.34.124 – 10.64.34.124	10.64.34.124
126	10.64.34.125/32	10.64.34.125 – 10.64.34.125	10.64.34.125
127	10.64.34.126/32	10.64.34.126 – 10.64.34.126	10.64.34.126
128	10.64.34.127/32	10.64.34.127 – 10.64.34.127	10.64.34.127
129	10.64.34.128/32	10.64.34.128 – 10.64.34.128	10.64.34.128
130	10.64.34.129/32	10.64.34.129 – 10.64.34.129	10.64.34.129
131	10.64.34.130/32	10.64.34.130 – 10.64.34.130	10.64.34.130
132	10.64.34.131/32	10.64.34.131 – 10.64.34.131	10.64.34.131
133	10.64.34.132/32	10.64.34.132 – 10.64.34.132	10.64.34.132
134	10.64.34.133/32	10.64.34.133 – 10.64.34.133	10.64.34.133
135	10.64.34.134/32	10.64.34.134 – 10.64.34.134	10.64.34.134
136	10.64.34.135/32	10.64.34.135 – 10.64.34.135	10.64.34.135
137	10.64.34.136/32	10.64.34.136 – 10.64.34.136	10.64.34.136
138	10.64.34.137/32	10.64.34.137 – 10.64.34.137	10.64.34.137
139	10.64.34.138/32	10.64.34.138 – 10.64.34.138	10.64.34.138
140	10.64.34.139/32	10.64.34.139 – 10.64.34.139	10.64.34.139
141	10.64.34.140/32	10.64.34.140 – 10.64.34.140	10.64.34.140
142	10.64.34.141/32	10.64.34.141 – 10.64.34.141	10.64.34.141
143	10.64.34.142/32	10.64.34.142 – 10.64.34.142	10.64.34.142
144	10.64.34.143/32	10.64.34.143 – 10.64.34.143	10.64.34.143
145	10.64.34.144/32	10.64.34.144 – 10.64.34.144	10.64.34.144
146	10.64.34.145/32	10.64.34.145 – 10.64.34.145	10.64.34.145
147	10.64.34.146/32	10.64.34.146 – 10.64.34.146	10.64.34.146
148	10.64.34.147/32	10.64.34.147 – 10.64.34.147	10.64.34.147
149	10.64.34.148/32	10.64.34.148 – 10.64.34.148	10.64.34.148
150	10.64.34.149/32	10.64.34.149 – 10.64.34.149	10.64.34.149
151	10.64.34.150/32	10.64.34.150 – 10.64.34.150	10.64.34.150
152	10.64.34.151/32	10.64.34.151 – 10.64.34.151	10.64.34.151
153	10.64.34.152/32	10.64.34.152 – 10.64.34.152	10.64.34.152
154	10.64.34.153/32	10.64.34.153 – 10.64.34.153	10.64.34.153
155	10.64.34.154/32	10.64.34.154 – 10.64.34.154	10.64.34.154
156	10.64.34.155/32	10.64.34.155 – 10.64.34.155	10.64.34.155
157	10.64.34.156/32	10.64.34.156 – 10.64.34.156	10.64.34.156
158	10.64.34.157/32	10.64.34.157 – 10.64.34.157	10.64.34.157
159	10.64.34.158/32	10.64.34.158 – 10.64.34.158	10.64.34.158
160	10.64.34.159/32	10.64.34.159 – 10.64.34.159	10.64.34.159
161	10.64.34.160/32	10.64.34.160 – 10.64.34.160	10.64.34.160
162	10.64.34.161/32	10.64.34.161 – 10.64.34.161	10.64.34.161
163	10.64.34.162/32	10.64.34.162 – 10.64.34.162	10.64.34.162
164	10.64.34.163/32	10.64.34.163 – 10.64.34.163	10.64.34.163
165	10.64.34.164/32	10.64.34.164 – 10.64.34.164	10.64.34.164
166	10.64.34.165/32	10.64.34.165 – 10.64.34.165	10.64.34.165
167	10.64.34.166/32	10.64.34.166 – 10.64.34.166	10.64.34.166
168	10.64.34.167/32	10.64.34.167 – 10.64.34.167	10.64.34.167
169	10.64.34.168/32	10.64.34.168 – 10.64.34.168	10.64.34.168
170	10.64.34.169/32	10.64.34.169 – 10.64.34.169	10.64.34.169
171	10.64.34.170/32	10.64.34.170 – 10.64.34.170	10.64.34.170
172	10.64.34.171/32	10.64.34.171 – 10.64.34.171	10.64.34.171
173	10.64.34.172/32	10.64.34.172 – 10.64.34.172	10.64.34.172
174	10.64.34.173/32	10.64.34.173 – 10.64.34.173	10.64.34.173
175	10.64.34.174/32	10.64.34.174 – 10.64.34.174	10.64.34.174
176	10.64.34.175/32	10.64.34.175 – 10.64.34.175	10.64.34.175
177	10.64.34.176/32	10.64.34.176 – 10.64.34.176	10.64.34.176
178	10.64.34.177/32	10.64.34.177 – 10.64.34.177	10.64.34.177
179	10.64.34.178/32	10.64.34.178 – 10.64.34.178	10.64.34.178
180	10.64.34.179/32	10.64.34.179 – 10.64.34.179	10.64.34.179
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190	10.64.34.189/32	10.64.34.189 – 10.64.34.189	10.64.34.189
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192	10.64.34.191/32	10.64.34.191 – 10.64.34.191	10.64.34.191
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197	10.64.34.196/32	10.64.34.196 – 10.64.34.196	10.64.34.196
198	10.64.34.197/32	10.64.34.197 – 10.64.34.197	10.64.34.197
199	10.64.34.198/32	10.64.34.198 – 10.64.34.198	10.64.34.198
200	10.64.34.199/32	10.64.34.199 – 10.64.34.199	10.64.34.199
201	10.64.34.200/32	10.64.34.200 – 10.64.34.200	10.64.34.200
202	10.64.34.201/32	10.64.34.201 – 10.64.34.201	10.64.34.201
203	10.64.34.202/32	10.64.34.202 – 10.64.34.202	10.64.34.202
204	10.64.34.203/32	10.64.34.203 – 10.64.34.203	10.64.34.203
205	10.64.34.204/32	10.64.34.204 – 10.64.34.204	10.64.34.204
206	10.64.34.205/32	10.64.34.205 – 10.64.34.205	10.64.34.205
207	10.64.34.206/32	10.64.34.206 – 10.64.34.206	10.64.34.206
208	10.64.34.207/32	10.64.34.207 – 10.64.34.207	10.64.34.207
209	10.64.34.208/32	10.64.34.208 – 10.64.34.208	10.64.34.208
210	10.64.34.209/32	10.64.34.209 – 10.64.34.209	10.64.34.209
211	10.64.34.210/32	10.64.34.210 – 10.64.34.210	10.64.34.210
212	10.64.34.211/32	10.64.34.211 – 10.64.34.211	10.64.34.211
213	10.64.34.212/32	10.64.34.212 – 10.64.34.212	10.64.34.212
214	10.64.34.213/32	10.64.34.213 – 10.64.34.213	10.64.34.213
215	10.64.34.214/32	10.64.34.214 – 10.64.34.214	10.64.34.214
216	10.64.34.215/32	10.64.34.215 – 10.64.34.215	10.64.34.215
217	10.64.34.216/32	10.64.34.216 – 10.64.34.216	10.64.34.216
218	10.64.34.217/32	10.64.34.217 – 10.64.34.217	10.64.34.217
219	10.64.34.218/32	10.64.34.218 – 10.64.34.218	10.64.34.218
220	10.64.34.219/32	10.64.34.219 – 10.64.34.219	10.64.34.219
221	10.64.34.220/32	10.64.34.220 – 10.64.34.220	10.64.34.220
222	10.64.34.221/32	10.64.34.221 – 10.64.34.221	10.64.34.221
223	10.64.34.222/32	10.64.34.222 – 10.64.34.222	10.64.34.222
224	10.64.34.223/32	10.64.34.223 – 10.64.34.223	10.64.34.223
225	10.64.34.224/32	10.64.34.224 – 10.64.34.224	10.64.34.224
226	10.64.34.225/32	10.64.34.225 – 10.64.34.225	10.64.34.225
227	10.64.34.226/32	10.64.34.226 – 10.64.34.226	10.64.34.226
228	10.64.34.227/32	10.64.34.227 – 10.64.34.227	10.64.34.227
229	10.64.34.228/32	10.64.34.228 – 10.64.34.228	10.64.34.228
230	10.64.34.229/32	10.64.34.229 – 10.64.34.229	10.64.34.229
231	10.64.34.230/32	10.64.34.230 – 10.64.34.230	10.64.34.230
232	10.64.34.231/32	10.64.34.231 – 10.64.34.231	10.64.34.231
233	10.64.34.232/32	10.64.34.232 – 10.64.34.232	10.64.34.232
234	10.64.34.233/32	10.64.34.233 – 10.64.34.233	10.64.34.233
235	10.64.34.234/32	10.64.34.234 – 10.64.34.234	10.64.34.234
236	10.64.34.235/32	10.64.34.235 – 10.64.34.235	10.64.34.235
237	10.64.34.236/32	10.64.34.236 – 10.64.34.236	10.64.34.236
238	10.64.34.237/32	10.64.34.237 – 10.64.34.237	10.64.34.237
239	10.64.34.238/32	10.64.34.238 – 10.64.34.238	10.64.34.238
240	10.64.34.239/32	10.64.34.239 – 10.64.34.239	10.64.34.239
241	10.64.34.240/32	10.64.34.240 – 10.64.34.240	10.64.34.240
242	10.64.34.241/32	10.64.34.241 – 10.64.34.241	10.64.34.241
243	10.64.34.242/32	10.64.34.242 – 10.64.34.242	10.64.34.242
244	10.64.34.243/32	10.64.34.243 – 10.64.34.243	10.64.34.243
245	10.64.34.244/32	10.64.34.244 – 10.64.34.244	10.64.34.244
246	10.64.34.245/32	10.64.34.245 – 10.64.34.245	10.64.34.245
247	10.64.34.246/32	10.64.34.246 – 10.64.34.246	10.64.34.246
248	10.64.34.247/32	10.64.34.247 – 10.64.34.247	10.64.34.247
249	10.64.34.248/32	10.64.34.248 – 10.64.34.248	10.64.34.248
250	10.64.34.249/32	10.64.34.249 – 10.64.34.249	10.64.34.249
251	10.64.34.250/32	10.64.34.250 – 10.64.34.250	10.64.34.250
252	10.64.34.251/32	10.64.34.251 – 10.64.34.251	10.64.34.251
253	10.64.34.252/32	10.64.34.252 – 10.64.34.252	10.64.34.252
254	10.64.34.253/32	10.64.34.253 – 10.64.34.253	10.64.34.253
255	10.64.34.254/32	10.64.34.254 – 10.64.34.254	10.64.34.254
256	10.64.34.255/32	10.64.34.255 – 10.64.34.255	10.64.34.255

showing 256 of 512

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 →