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)10.45.58.0/24

network10.45.58.0/24

broadcast10.45.58.255

first host10.45.58.1

last host10.45.58.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.45.58.0/24

address00001010.00101101.00111010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00101101.00111010.00000000

broadcast00001010.00101101.00111010.11111111

green = network part, grey = host part

hex0x0a2d3a00

decimal170736128

reverse dns0.58.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:3a00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.45.58.0/32	10.45.58.0 – 10.45.58.0	10.45.58.0
2	10.45.58.1/32	10.45.58.1 – 10.45.58.1	10.45.58.1
3	10.45.58.2/32	10.45.58.2 – 10.45.58.2	10.45.58.2
4	10.45.58.3/32	10.45.58.3 – 10.45.58.3	10.45.58.3
5	10.45.58.4/32	10.45.58.4 – 10.45.58.4	10.45.58.4
6	10.45.58.5/32	10.45.58.5 – 10.45.58.5	10.45.58.5
7	10.45.58.6/32	10.45.58.6 – 10.45.58.6	10.45.58.6
8	10.45.58.7/32	10.45.58.7 – 10.45.58.7	10.45.58.7
9	10.45.58.8/32	10.45.58.8 – 10.45.58.8	10.45.58.8
10	10.45.58.9/32	10.45.58.9 – 10.45.58.9	10.45.58.9
11	10.45.58.10/32	10.45.58.10 – 10.45.58.10	10.45.58.10
12	10.45.58.11/32	10.45.58.11 – 10.45.58.11	10.45.58.11
13	10.45.58.12/32	10.45.58.12 – 10.45.58.12	10.45.58.12
14	10.45.58.13/32	10.45.58.13 – 10.45.58.13	10.45.58.13
15	10.45.58.14/32	10.45.58.14 – 10.45.58.14	10.45.58.14
16	10.45.58.15/32	10.45.58.15 – 10.45.58.15	10.45.58.15
17	10.45.58.16/32	10.45.58.16 – 10.45.58.16	10.45.58.16
18	10.45.58.17/32	10.45.58.17 – 10.45.58.17	10.45.58.17
19	10.45.58.18/32	10.45.58.18 – 10.45.58.18	10.45.58.18
20	10.45.58.19/32	10.45.58.19 – 10.45.58.19	10.45.58.19
21	10.45.58.20/32	10.45.58.20 – 10.45.58.20	10.45.58.20
22	10.45.58.21/32	10.45.58.21 – 10.45.58.21	10.45.58.21
23	10.45.58.22/32	10.45.58.22 – 10.45.58.22	10.45.58.22
24	10.45.58.23/32	10.45.58.23 – 10.45.58.23	10.45.58.23
25	10.45.58.24/32	10.45.58.24 – 10.45.58.24	10.45.58.24
26	10.45.58.25/32	10.45.58.25 – 10.45.58.25	10.45.58.25
27	10.45.58.26/32	10.45.58.26 – 10.45.58.26	10.45.58.26
28	10.45.58.27/32	10.45.58.27 – 10.45.58.27	10.45.58.27
29	10.45.58.28/32	10.45.58.28 – 10.45.58.28	10.45.58.28
30	10.45.58.29/32	10.45.58.29 – 10.45.58.29	10.45.58.29
31	10.45.58.30/32	10.45.58.30 – 10.45.58.30	10.45.58.30
32	10.45.58.31/32	10.45.58.31 – 10.45.58.31	10.45.58.31
33	10.45.58.32/32	10.45.58.32 – 10.45.58.32	10.45.58.32
34	10.45.58.33/32	10.45.58.33 – 10.45.58.33	10.45.58.33
35	10.45.58.34/32	10.45.58.34 – 10.45.58.34	10.45.58.34
36	10.45.58.35/32	10.45.58.35 – 10.45.58.35	10.45.58.35
37	10.45.58.36/32	10.45.58.36 – 10.45.58.36	10.45.58.36
38	10.45.58.37/32	10.45.58.37 – 10.45.58.37	10.45.58.37
39	10.45.58.38/32	10.45.58.38 – 10.45.58.38	10.45.58.38
40	10.45.58.39/32	10.45.58.39 – 10.45.58.39	10.45.58.39
41	10.45.58.40/32	10.45.58.40 – 10.45.58.40	10.45.58.40
42	10.45.58.41/32	10.45.58.41 – 10.45.58.41	10.45.58.41
43	10.45.58.42/32	10.45.58.42 – 10.45.58.42	10.45.58.42
44	10.45.58.43/32	10.45.58.43 – 10.45.58.43	10.45.58.43
45	10.45.58.44/32	10.45.58.44 – 10.45.58.44	10.45.58.44
46	10.45.58.45/32	10.45.58.45 – 10.45.58.45	10.45.58.45
47	10.45.58.46/32	10.45.58.46 – 10.45.58.46	10.45.58.46
48	10.45.58.47/32	10.45.58.47 – 10.45.58.47	10.45.58.47
49	10.45.58.48/32	10.45.58.48 – 10.45.58.48	10.45.58.48
50	10.45.58.49/32	10.45.58.49 – 10.45.58.49	10.45.58.49
51	10.45.58.50/32	10.45.58.50 – 10.45.58.50	10.45.58.50
52	10.45.58.51/32	10.45.58.51 – 10.45.58.51	10.45.58.51
53	10.45.58.52/32	10.45.58.52 – 10.45.58.52	10.45.58.52
54	10.45.58.53/32	10.45.58.53 – 10.45.58.53	10.45.58.53
55	10.45.58.54/32	10.45.58.54 – 10.45.58.54	10.45.58.54
56	10.45.58.55/32	10.45.58.55 – 10.45.58.55	10.45.58.55
57	10.45.58.56/32	10.45.58.56 – 10.45.58.56	10.45.58.56
58	10.45.58.57/32	10.45.58.57 – 10.45.58.57	10.45.58.57
59	10.45.58.58/32	10.45.58.58 – 10.45.58.58	10.45.58.58
60	10.45.58.59/32	10.45.58.59 – 10.45.58.59	10.45.58.59
61	10.45.58.60/32	10.45.58.60 – 10.45.58.60	10.45.58.60
62	10.45.58.61/32	10.45.58.61 – 10.45.58.61	10.45.58.61
63	10.45.58.62/32	10.45.58.62 – 10.45.58.62	10.45.58.62
64	10.45.58.63/32	10.45.58.63 – 10.45.58.63	10.45.58.63
65	10.45.58.64/32	10.45.58.64 – 10.45.58.64	10.45.58.64
66	10.45.58.65/32	10.45.58.65 – 10.45.58.65	10.45.58.65
67	10.45.58.66/32	10.45.58.66 – 10.45.58.66	10.45.58.66
68	10.45.58.67/32	10.45.58.67 – 10.45.58.67	10.45.58.67
69	10.45.58.68/32	10.45.58.68 – 10.45.58.68	10.45.58.68
70	10.45.58.69/32	10.45.58.69 – 10.45.58.69	10.45.58.69
71	10.45.58.70/32	10.45.58.70 – 10.45.58.70	10.45.58.70
72	10.45.58.71/32	10.45.58.71 – 10.45.58.71	10.45.58.71
73	10.45.58.72/32	10.45.58.72 – 10.45.58.72	10.45.58.72
74	10.45.58.73/32	10.45.58.73 – 10.45.58.73	10.45.58.73
75	10.45.58.74/32	10.45.58.74 – 10.45.58.74	10.45.58.74
76	10.45.58.75/32	10.45.58.75 – 10.45.58.75	10.45.58.75
77	10.45.58.76/32	10.45.58.76 – 10.45.58.76	10.45.58.76
78	10.45.58.77/32	10.45.58.77 – 10.45.58.77	10.45.58.77
79	10.45.58.78/32	10.45.58.78 – 10.45.58.78	10.45.58.78
80	10.45.58.79/32	10.45.58.79 – 10.45.58.79	10.45.58.79
81	10.45.58.80/32	10.45.58.80 – 10.45.58.80	10.45.58.80
82	10.45.58.81/32	10.45.58.81 – 10.45.58.81	10.45.58.81
83	10.45.58.82/32	10.45.58.82 – 10.45.58.82	10.45.58.82
84	10.45.58.83/32	10.45.58.83 – 10.45.58.83	10.45.58.83
85	10.45.58.84/32	10.45.58.84 – 10.45.58.84	10.45.58.84
86	10.45.58.85/32	10.45.58.85 – 10.45.58.85	10.45.58.85
87	10.45.58.86/32	10.45.58.86 – 10.45.58.86	10.45.58.86
88	10.45.58.87/32	10.45.58.87 – 10.45.58.87	10.45.58.87
89	10.45.58.88/32	10.45.58.88 – 10.45.58.88	10.45.58.88
90	10.45.58.89/32	10.45.58.89 – 10.45.58.89	10.45.58.89
91	10.45.58.90/32	10.45.58.90 – 10.45.58.90	10.45.58.90
92	10.45.58.91/32	10.45.58.91 – 10.45.58.91	10.45.58.91
93	10.45.58.92/32	10.45.58.92 – 10.45.58.92	10.45.58.92
94	10.45.58.93/32	10.45.58.93 – 10.45.58.93	10.45.58.93
95	10.45.58.94/32	10.45.58.94 – 10.45.58.94	10.45.58.94
96	10.45.58.95/32	10.45.58.95 – 10.45.58.95	10.45.58.95
97	10.45.58.96/32	10.45.58.96 – 10.45.58.96	10.45.58.96
98	10.45.58.97/32	10.45.58.97 – 10.45.58.97	10.45.58.97
99	10.45.58.98/32	10.45.58.98 – 10.45.58.98	10.45.58.98
100	10.45.58.99/32	10.45.58.99 – 10.45.58.99	10.45.58.99
101	10.45.58.100/32	10.45.58.100 – 10.45.58.100	10.45.58.100
102	10.45.58.101/32	10.45.58.101 – 10.45.58.101	10.45.58.101
103	10.45.58.102/32	10.45.58.102 – 10.45.58.102	10.45.58.102
104	10.45.58.103/32	10.45.58.103 – 10.45.58.103	10.45.58.103
105	10.45.58.104/32	10.45.58.104 – 10.45.58.104	10.45.58.104
106	10.45.58.105/32	10.45.58.105 – 10.45.58.105	10.45.58.105
107	10.45.58.106/32	10.45.58.106 – 10.45.58.106	10.45.58.106
108	10.45.58.107/32	10.45.58.107 – 10.45.58.107	10.45.58.107
109	10.45.58.108/32	10.45.58.108 – 10.45.58.108	10.45.58.108
110	10.45.58.109/32	10.45.58.109 – 10.45.58.109	10.45.58.109
111	10.45.58.110/32	10.45.58.110 – 10.45.58.110	10.45.58.110
112	10.45.58.111/32	10.45.58.111 – 10.45.58.111	10.45.58.111
113	10.45.58.112/32	10.45.58.112 – 10.45.58.112	10.45.58.112
114	10.45.58.113/32	10.45.58.113 – 10.45.58.113	10.45.58.113
115	10.45.58.114/32	10.45.58.114 – 10.45.58.114	10.45.58.114
116	10.45.58.115/32	10.45.58.115 – 10.45.58.115	10.45.58.115
117	10.45.58.116/32	10.45.58.116 – 10.45.58.116	10.45.58.116
118	10.45.58.117/32	10.45.58.117 – 10.45.58.117	10.45.58.117
119	10.45.58.118/32	10.45.58.118 – 10.45.58.118	10.45.58.118
120	10.45.58.119/32	10.45.58.119 – 10.45.58.119	10.45.58.119
121	10.45.58.120/32	10.45.58.120 – 10.45.58.120	10.45.58.120
122	10.45.58.121/32	10.45.58.121 – 10.45.58.121	10.45.58.121
123	10.45.58.122/32	10.45.58.122 – 10.45.58.122	10.45.58.122
124	10.45.58.123/32	10.45.58.123 – 10.45.58.123	10.45.58.123
125	10.45.58.124/32	10.45.58.124 – 10.45.58.124	10.45.58.124
126	10.45.58.125/32	10.45.58.125 – 10.45.58.125	10.45.58.125
127	10.45.58.126/32	10.45.58.126 – 10.45.58.126	10.45.58.126
128	10.45.58.127/32	10.45.58.127 – 10.45.58.127	10.45.58.127
129	10.45.58.128/32	10.45.58.128 – 10.45.58.128	10.45.58.128
130	10.45.58.129/32	10.45.58.129 – 10.45.58.129	10.45.58.129
131	10.45.58.130/32	10.45.58.130 – 10.45.58.130	10.45.58.130
132	10.45.58.131/32	10.45.58.131 – 10.45.58.131	10.45.58.131
133	10.45.58.132/32	10.45.58.132 – 10.45.58.132	10.45.58.132
134	10.45.58.133/32	10.45.58.133 – 10.45.58.133	10.45.58.133
135	10.45.58.134/32	10.45.58.134 – 10.45.58.134	10.45.58.134
136	10.45.58.135/32	10.45.58.135 – 10.45.58.135	10.45.58.135
137	10.45.58.136/32	10.45.58.136 – 10.45.58.136	10.45.58.136
138	10.45.58.137/32	10.45.58.137 – 10.45.58.137	10.45.58.137
139	10.45.58.138/32	10.45.58.138 – 10.45.58.138	10.45.58.138
140	10.45.58.139/32	10.45.58.139 – 10.45.58.139	10.45.58.139
141	10.45.58.140/32	10.45.58.140 – 10.45.58.140	10.45.58.140
142	10.45.58.141/32	10.45.58.141 – 10.45.58.141	10.45.58.141
143	10.45.58.142/32	10.45.58.142 – 10.45.58.142	10.45.58.142
144	10.45.58.143/32	10.45.58.143 – 10.45.58.143	10.45.58.143
145	10.45.58.144/32	10.45.58.144 – 10.45.58.144	10.45.58.144
146	10.45.58.145/32	10.45.58.145 – 10.45.58.145	10.45.58.145
147	10.45.58.146/32	10.45.58.146 – 10.45.58.146	10.45.58.146
148	10.45.58.147/32	10.45.58.147 – 10.45.58.147	10.45.58.147
149	10.45.58.148/32	10.45.58.148 – 10.45.58.148	10.45.58.148
150	10.45.58.149/32	10.45.58.149 – 10.45.58.149	10.45.58.149
151	10.45.58.150/32	10.45.58.150 – 10.45.58.150	10.45.58.150
152	10.45.58.151/32	10.45.58.151 – 10.45.58.151	10.45.58.151
153	10.45.58.152/32	10.45.58.152 – 10.45.58.152	10.45.58.152
154	10.45.58.153/32	10.45.58.153 – 10.45.58.153	10.45.58.153
155	10.45.58.154/32	10.45.58.154 – 10.45.58.154	10.45.58.154
156	10.45.58.155/32	10.45.58.155 – 10.45.58.155	10.45.58.155
157	10.45.58.156/32	10.45.58.156 – 10.45.58.156	10.45.58.156
158	10.45.58.157/32	10.45.58.157 – 10.45.58.157	10.45.58.157
159	10.45.58.158/32	10.45.58.158 – 10.45.58.158	10.45.58.158
160	10.45.58.159/32	10.45.58.159 – 10.45.58.159	10.45.58.159
161	10.45.58.160/32	10.45.58.160 – 10.45.58.160	10.45.58.160
162	10.45.58.161/32	10.45.58.161 – 10.45.58.161	10.45.58.161
163	10.45.58.162/32	10.45.58.162 – 10.45.58.162	10.45.58.162
164	10.45.58.163/32	10.45.58.163 – 10.45.58.163	10.45.58.163
165	10.45.58.164/32	10.45.58.164 – 10.45.58.164	10.45.58.164
166	10.45.58.165/32	10.45.58.165 – 10.45.58.165	10.45.58.165
167	10.45.58.166/32	10.45.58.166 – 10.45.58.166	10.45.58.166
168	10.45.58.167/32	10.45.58.167 – 10.45.58.167	10.45.58.167
169	10.45.58.168/32	10.45.58.168 – 10.45.58.168	10.45.58.168
170	10.45.58.169/32	10.45.58.169 – 10.45.58.169	10.45.58.169
171	10.45.58.170/32	10.45.58.170 – 10.45.58.170	10.45.58.170
172	10.45.58.171/32	10.45.58.171 – 10.45.58.171	10.45.58.171
173	10.45.58.172/32	10.45.58.172 – 10.45.58.172	10.45.58.172
174	10.45.58.173/32	10.45.58.173 – 10.45.58.173	10.45.58.173
175	10.45.58.174/32	10.45.58.174 – 10.45.58.174	10.45.58.174
176	10.45.58.175/32	10.45.58.175 – 10.45.58.175	10.45.58.175
177	10.45.58.176/32	10.45.58.176 – 10.45.58.176	10.45.58.176
178	10.45.58.177/32	10.45.58.177 – 10.45.58.177	10.45.58.177
179	10.45.58.178/32	10.45.58.178 – 10.45.58.178	10.45.58.178
180	10.45.58.179/32	10.45.58.179 – 10.45.58.179	10.45.58.179
181	10.45.58.180/32	10.45.58.180 – 10.45.58.180	10.45.58.180
182	10.45.58.181/32	10.45.58.181 – 10.45.58.181	10.45.58.181
183	10.45.58.182/32	10.45.58.182 – 10.45.58.182	10.45.58.182
184	10.45.58.183/32	10.45.58.183 – 10.45.58.183	10.45.58.183
185	10.45.58.184/32	10.45.58.184 – 10.45.58.184	10.45.58.184
186	10.45.58.185/32	10.45.58.185 – 10.45.58.185	10.45.58.185
187	10.45.58.186/32	10.45.58.186 – 10.45.58.186	10.45.58.186
188	10.45.58.187/32	10.45.58.187 – 10.45.58.187	10.45.58.187
189	10.45.58.188/32	10.45.58.188 – 10.45.58.188	10.45.58.188
190	10.45.58.189/32	10.45.58.189 – 10.45.58.189	10.45.58.189
191	10.45.58.190/32	10.45.58.190 – 10.45.58.190	10.45.58.190
192	10.45.58.191/32	10.45.58.191 – 10.45.58.191	10.45.58.191
193	10.45.58.192/32	10.45.58.192 – 10.45.58.192	10.45.58.192
194	10.45.58.193/32	10.45.58.193 – 10.45.58.193	10.45.58.193
195	10.45.58.194/32	10.45.58.194 – 10.45.58.194	10.45.58.194
196	10.45.58.195/32	10.45.58.195 – 10.45.58.195	10.45.58.195
197	10.45.58.196/32	10.45.58.196 – 10.45.58.196	10.45.58.196
198	10.45.58.197/32	10.45.58.197 – 10.45.58.197	10.45.58.197
199	10.45.58.198/32	10.45.58.198 – 10.45.58.198	10.45.58.198
200	10.45.58.199/32	10.45.58.199 – 10.45.58.199	10.45.58.199
201	10.45.58.200/32	10.45.58.200 – 10.45.58.200	10.45.58.200
202	10.45.58.201/32	10.45.58.201 – 10.45.58.201	10.45.58.201
203	10.45.58.202/32	10.45.58.202 – 10.45.58.202	10.45.58.202
204	10.45.58.203/32	10.45.58.203 – 10.45.58.203	10.45.58.203
205	10.45.58.204/32	10.45.58.204 – 10.45.58.204	10.45.58.204
206	10.45.58.205/32	10.45.58.205 – 10.45.58.205	10.45.58.205
207	10.45.58.206/32	10.45.58.206 – 10.45.58.206	10.45.58.206
208	10.45.58.207/32	10.45.58.207 – 10.45.58.207	10.45.58.207
209	10.45.58.208/32	10.45.58.208 – 10.45.58.208	10.45.58.208
210	10.45.58.209/32	10.45.58.209 – 10.45.58.209	10.45.58.209
211	10.45.58.210/32	10.45.58.210 – 10.45.58.210	10.45.58.210
212	10.45.58.211/32	10.45.58.211 – 10.45.58.211	10.45.58.211
213	10.45.58.212/32	10.45.58.212 – 10.45.58.212	10.45.58.212
214	10.45.58.213/32	10.45.58.213 – 10.45.58.213	10.45.58.213
215	10.45.58.214/32	10.45.58.214 – 10.45.58.214	10.45.58.214
216	10.45.58.215/32	10.45.58.215 – 10.45.58.215	10.45.58.215
217	10.45.58.216/32	10.45.58.216 – 10.45.58.216	10.45.58.216
218	10.45.58.217/32	10.45.58.217 – 10.45.58.217	10.45.58.217
219	10.45.58.218/32	10.45.58.218 – 10.45.58.218	10.45.58.218
220	10.45.58.219/32	10.45.58.219 – 10.45.58.219	10.45.58.219
221	10.45.58.220/32	10.45.58.220 – 10.45.58.220	10.45.58.220
222	10.45.58.221/32	10.45.58.221 – 10.45.58.221	10.45.58.221
223	10.45.58.222/32	10.45.58.222 – 10.45.58.222	10.45.58.222
224	10.45.58.223/32	10.45.58.223 – 10.45.58.223	10.45.58.223
225	10.45.58.224/32	10.45.58.224 – 10.45.58.224	10.45.58.224
226	10.45.58.225/32	10.45.58.225 – 10.45.58.225	10.45.58.225
227	10.45.58.226/32	10.45.58.226 – 10.45.58.226	10.45.58.226
228	10.45.58.227/32	10.45.58.227 – 10.45.58.227	10.45.58.227
229	10.45.58.228/32	10.45.58.228 – 10.45.58.228	10.45.58.228
230	10.45.58.229/32	10.45.58.229 – 10.45.58.229	10.45.58.229
231	10.45.58.230/32	10.45.58.230 – 10.45.58.230	10.45.58.230
232	10.45.58.231/32	10.45.58.231 – 10.45.58.231	10.45.58.231
233	10.45.58.232/32	10.45.58.232 – 10.45.58.232	10.45.58.232
234	10.45.58.233/32	10.45.58.233 – 10.45.58.233	10.45.58.233
235	10.45.58.234/32	10.45.58.234 – 10.45.58.234	10.45.58.234
236	10.45.58.235/32	10.45.58.235 – 10.45.58.235	10.45.58.235
237	10.45.58.236/32	10.45.58.236 – 10.45.58.236	10.45.58.236
238	10.45.58.237/32	10.45.58.237 – 10.45.58.237	10.45.58.237
239	10.45.58.238/32	10.45.58.238 – 10.45.58.238	10.45.58.238
240	10.45.58.239/32	10.45.58.239 – 10.45.58.239	10.45.58.239
241	10.45.58.240/32	10.45.58.240 – 10.45.58.240	10.45.58.240
242	10.45.58.241/32	10.45.58.241 – 10.45.58.241	10.45.58.241
243	10.45.58.242/32	10.45.58.242 – 10.45.58.242	10.45.58.242
244	10.45.58.243/32	10.45.58.243 – 10.45.58.243	10.45.58.243
245	10.45.58.244/32	10.45.58.244 – 10.45.58.244	10.45.58.244
246	10.45.58.245/32	10.45.58.245 – 10.45.58.245	10.45.58.245
247	10.45.58.246/32	10.45.58.246 – 10.45.58.246	10.45.58.246
248	10.45.58.247/32	10.45.58.247 – 10.45.58.247	10.45.58.247
249	10.45.58.248/32	10.45.58.248 – 10.45.58.248	10.45.58.248
250	10.45.58.249/32	10.45.58.249 – 10.45.58.249	10.45.58.249
251	10.45.58.250/32	10.45.58.250 – 10.45.58.250	10.45.58.250
252	10.45.58.251/32	10.45.58.251 – 10.45.58.251	10.45.58.251
253	10.45.58.252/32	10.45.58.252 – 10.45.58.252	10.45.58.252
254	10.45.58.253/32	10.45.58.253 – 10.45.58.253	10.45.58.253
255	10.45.58.254/32	10.45.58.254 – 10.45.58.254	10.45.58.254
256	10.45.58.255/32	10.45.58.255 – 10.45.58.255	10.45.58.255

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