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)10.28.4.0/22

network10.28.4.0/22

broadcast10.28.7.255

first host10.28.4.1

last host10.28.7.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.28.4.0/22

address00001010.00011100.00000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00011100.00000100.00000000

broadcast00001010.00011100.00000111.11111111

green = network part, grey = host part

hex0x0a1c0400

decimal169608192

reverse dns0.4.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:400

/22 split into /32 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.28.4.0/32	10.28.4.0 – 10.28.4.0	10.28.4.0
2	10.28.4.1/32	10.28.4.1 – 10.28.4.1	10.28.4.1
3	10.28.4.2/32	10.28.4.2 – 10.28.4.2	10.28.4.2
4	10.28.4.3/32	10.28.4.3 – 10.28.4.3	10.28.4.3
5	10.28.4.4/32	10.28.4.4 – 10.28.4.4	10.28.4.4
6	10.28.4.5/32	10.28.4.5 – 10.28.4.5	10.28.4.5
7	10.28.4.6/32	10.28.4.6 – 10.28.4.6	10.28.4.6
8	10.28.4.7/32	10.28.4.7 – 10.28.4.7	10.28.4.7
9	10.28.4.8/32	10.28.4.8 – 10.28.4.8	10.28.4.8
10	10.28.4.9/32	10.28.4.9 – 10.28.4.9	10.28.4.9
11	10.28.4.10/32	10.28.4.10 – 10.28.4.10	10.28.4.10
12	10.28.4.11/32	10.28.4.11 – 10.28.4.11	10.28.4.11
13	10.28.4.12/32	10.28.4.12 – 10.28.4.12	10.28.4.12
14	10.28.4.13/32	10.28.4.13 – 10.28.4.13	10.28.4.13
15	10.28.4.14/32	10.28.4.14 – 10.28.4.14	10.28.4.14
16	10.28.4.15/32	10.28.4.15 – 10.28.4.15	10.28.4.15
17	10.28.4.16/32	10.28.4.16 – 10.28.4.16	10.28.4.16
18	10.28.4.17/32	10.28.4.17 – 10.28.4.17	10.28.4.17
19	10.28.4.18/32	10.28.4.18 – 10.28.4.18	10.28.4.18
20	10.28.4.19/32	10.28.4.19 – 10.28.4.19	10.28.4.19
21	10.28.4.20/32	10.28.4.20 – 10.28.4.20	10.28.4.20
22	10.28.4.21/32	10.28.4.21 – 10.28.4.21	10.28.4.21
23	10.28.4.22/32	10.28.4.22 – 10.28.4.22	10.28.4.22
24	10.28.4.23/32	10.28.4.23 – 10.28.4.23	10.28.4.23
25	10.28.4.24/32	10.28.4.24 – 10.28.4.24	10.28.4.24
26	10.28.4.25/32	10.28.4.25 – 10.28.4.25	10.28.4.25
27	10.28.4.26/32	10.28.4.26 – 10.28.4.26	10.28.4.26
28	10.28.4.27/32	10.28.4.27 – 10.28.4.27	10.28.4.27
29	10.28.4.28/32	10.28.4.28 – 10.28.4.28	10.28.4.28
30	10.28.4.29/32	10.28.4.29 – 10.28.4.29	10.28.4.29
31	10.28.4.30/32	10.28.4.30 – 10.28.4.30	10.28.4.30
32	10.28.4.31/32	10.28.4.31 – 10.28.4.31	10.28.4.31
33	10.28.4.32/32	10.28.4.32 – 10.28.4.32	10.28.4.32
34	10.28.4.33/32	10.28.4.33 – 10.28.4.33	10.28.4.33
35	10.28.4.34/32	10.28.4.34 – 10.28.4.34	10.28.4.34
36	10.28.4.35/32	10.28.4.35 – 10.28.4.35	10.28.4.35
37	10.28.4.36/32	10.28.4.36 – 10.28.4.36	10.28.4.36
38	10.28.4.37/32	10.28.4.37 – 10.28.4.37	10.28.4.37
39	10.28.4.38/32	10.28.4.38 – 10.28.4.38	10.28.4.38
40	10.28.4.39/32	10.28.4.39 – 10.28.4.39	10.28.4.39
41	10.28.4.40/32	10.28.4.40 – 10.28.4.40	10.28.4.40
42	10.28.4.41/32	10.28.4.41 – 10.28.4.41	10.28.4.41
43	10.28.4.42/32	10.28.4.42 – 10.28.4.42	10.28.4.42
44	10.28.4.43/32	10.28.4.43 – 10.28.4.43	10.28.4.43
45	10.28.4.44/32	10.28.4.44 – 10.28.4.44	10.28.4.44
46	10.28.4.45/32	10.28.4.45 – 10.28.4.45	10.28.4.45
47	10.28.4.46/32	10.28.4.46 – 10.28.4.46	10.28.4.46
48	10.28.4.47/32	10.28.4.47 – 10.28.4.47	10.28.4.47
49	10.28.4.48/32	10.28.4.48 – 10.28.4.48	10.28.4.48
50	10.28.4.49/32	10.28.4.49 – 10.28.4.49	10.28.4.49
51	10.28.4.50/32	10.28.4.50 – 10.28.4.50	10.28.4.50
52	10.28.4.51/32	10.28.4.51 – 10.28.4.51	10.28.4.51
53	10.28.4.52/32	10.28.4.52 – 10.28.4.52	10.28.4.52
54	10.28.4.53/32	10.28.4.53 – 10.28.4.53	10.28.4.53
55	10.28.4.54/32	10.28.4.54 – 10.28.4.54	10.28.4.54
56	10.28.4.55/32	10.28.4.55 – 10.28.4.55	10.28.4.55
57	10.28.4.56/32	10.28.4.56 – 10.28.4.56	10.28.4.56
58	10.28.4.57/32	10.28.4.57 – 10.28.4.57	10.28.4.57
59	10.28.4.58/32	10.28.4.58 – 10.28.4.58	10.28.4.58
60	10.28.4.59/32	10.28.4.59 – 10.28.4.59	10.28.4.59
61	10.28.4.60/32	10.28.4.60 – 10.28.4.60	10.28.4.60
62	10.28.4.61/32	10.28.4.61 – 10.28.4.61	10.28.4.61
63	10.28.4.62/32	10.28.4.62 – 10.28.4.62	10.28.4.62
64	10.28.4.63/32	10.28.4.63 – 10.28.4.63	10.28.4.63
65	10.28.4.64/32	10.28.4.64 – 10.28.4.64	10.28.4.64
66	10.28.4.65/32	10.28.4.65 – 10.28.4.65	10.28.4.65
67	10.28.4.66/32	10.28.4.66 – 10.28.4.66	10.28.4.66
68	10.28.4.67/32	10.28.4.67 – 10.28.4.67	10.28.4.67
69	10.28.4.68/32	10.28.4.68 – 10.28.4.68	10.28.4.68
70	10.28.4.69/32	10.28.4.69 – 10.28.4.69	10.28.4.69
71	10.28.4.70/32	10.28.4.70 – 10.28.4.70	10.28.4.70
72	10.28.4.71/32	10.28.4.71 – 10.28.4.71	10.28.4.71
73	10.28.4.72/32	10.28.4.72 – 10.28.4.72	10.28.4.72
74	10.28.4.73/32	10.28.4.73 – 10.28.4.73	10.28.4.73
75	10.28.4.74/32	10.28.4.74 – 10.28.4.74	10.28.4.74
76	10.28.4.75/32	10.28.4.75 – 10.28.4.75	10.28.4.75
77	10.28.4.76/32	10.28.4.76 – 10.28.4.76	10.28.4.76
78	10.28.4.77/32	10.28.4.77 – 10.28.4.77	10.28.4.77
79	10.28.4.78/32	10.28.4.78 – 10.28.4.78	10.28.4.78
80	10.28.4.79/32	10.28.4.79 – 10.28.4.79	10.28.4.79
81	10.28.4.80/32	10.28.4.80 – 10.28.4.80	10.28.4.80
82	10.28.4.81/32	10.28.4.81 – 10.28.4.81	10.28.4.81
83	10.28.4.82/32	10.28.4.82 – 10.28.4.82	10.28.4.82
84	10.28.4.83/32	10.28.4.83 – 10.28.4.83	10.28.4.83
85	10.28.4.84/32	10.28.4.84 – 10.28.4.84	10.28.4.84
86	10.28.4.85/32	10.28.4.85 – 10.28.4.85	10.28.4.85
87	10.28.4.86/32	10.28.4.86 – 10.28.4.86	10.28.4.86
88	10.28.4.87/32	10.28.4.87 – 10.28.4.87	10.28.4.87
89	10.28.4.88/32	10.28.4.88 – 10.28.4.88	10.28.4.88
90	10.28.4.89/32	10.28.4.89 – 10.28.4.89	10.28.4.89
91	10.28.4.90/32	10.28.4.90 – 10.28.4.90	10.28.4.90
92	10.28.4.91/32	10.28.4.91 – 10.28.4.91	10.28.4.91
93	10.28.4.92/32	10.28.4.92 – 10.28.4.92	10.28.4.92
94	10.28.4.93/32	10.28.4.93 – 10.28.4.93	10.28.4.93
95	10.28.4.94/32	10.28.4.94 – 10.28.4.94	10.28.4.94
96	10.28.4.95/32	10.28.4.95 – 10.28.4.95	10.28.4.95
97	10.28.4.96/32	10.28.4.96 – 10.28.4.96	10.28.4.96
98	10.28.4.97/32	10.28.4.97 – 10.28.4.97	10.28.4.97
99	10.28.4.98/32	10.28.4.98 – 10.28.4.98	10.28.4.98
100	10.28.4.99/32	10.28.4.99 – 10.28.4.99	10.28.4.99
101	10.28.4.100/32	10.28.4.100 – 10.28.4.100	10.28.4.100
102	10.28.4.101/32	10.28.4.101 – 10.28.4.101	10.28.4.101
103	10.28.4.102/32	10.28.4.102 – 10.28.4.102	10.28.4.102
104	10.28.4.103/32	10.28.4.103 – 10.28.4.103	10.28.4.103
105	10.28.4.104/32	10.28.4.104 – 10.28.4.104	10.28.4.104
106	10.28.4.105/32	10.28.4.105 – 10.28.4.105	10.28.4.105
107	10.28.4.106/32	10.28.4.106 – 10.28.4.106	10.28.4.106
108	10.28.4.107/32	10.28.4.107 – 10.28.4.107	10.28.4.107
109	10.28.4.108/32	10.28.4.108 – 10.28.4.108	10.28.4.108
110	10.28.4.109/32	10.28.4.109 – 10.28.4.109	10.28.4.109
111	10.28.4.110/32	10.28.4.110 – 10.28.4.110	10.28.4.110
112	10.28.4.111/32	10.28.4.111 – 10.28.4.111	10.28.4.111
113	10.28.4.112/32	10.28.4.112 – 10.28.4.112	10.28.4.112
114	10.28.4.113/32	10.28.4.113 – 10.28.4.113	10.28.4.113
115	10.28.4.114/32	10.28.4.114 – 10.28.4.114	10.28.4.114
116	10.28.4.115/32	10.28.4.115 – 10.28.4.115	10.28.4.115
117	10.28.4.116/32	10.28.4.116 – 10.28.4.116	10.28.4.116
118	10.28.4.117/32	10.28.4.117 – 10.28.4.117	10.28.4.117
119	10.28.4.118/32	10.28.4.118 – 10.28.4.118	10.28.4.118
120	10.28.4.119/32	10.28.4.119 – 10.28.4.119	10.28.4.119
121	10.28.4.120/32	10.28.4.120 – 10.28.4.120	10.28.4.120
122	10.28.4.121/32	10.28.4.121 – 10.28.4.121	10.28.4.121
123	10.28.4.122/32	10.28.4.122 – 10.28.4.122	10.28.4.122
124	10.28.4.123/32	10.28.4.123 – 10.28.4.123	10.28.4.123
125	10.28.4.124/32	10.28.4.124 – 10.28.4.124	10.28.4.124
126	10.28.4.125/32	10.28.4.125 – 10.28.4.125	10.28.4.125
127	10.28.4.126/32	10.28.4.126 – 10.28.4.126	10.28.4.126
128	10.28.4.127/32	10.28.4.127 – 10.28.4.127	10.28.4.127
129	10.28.4.128/32	10.28.4.128 – 10.28.4.128	10.28.4.128
130	10.28.4.129/32	10.28.4.129 – 10.28.4.129	10.28.4.129
131	10.28.4.130/32	10.28.4.130 – 10.28.4.130	10.28.4.130
132	10.28.4.131/32	10.28.4.131 – 10.28.4.131	10.28.4.131
133	10.28.4.132/32	10.28.4.132 – 10.28.4.132	10.28.4.132
134	10.28.4.133/32	10.28.4.133 – 10.28.4.133	10.28.4.133
135	10.28.4.134/32	10.28.4.134 – 10.28.4.134	10.28.4.134
136	10.28.4.135/32	10.28.4.135 – 10.28.4.135	10.28.4.135
137	10.28.4.136/32	10.28.4.136 – 10.28.4.136	10.28.4.136
138	10.28.4.137/32	10.28.4.137 – 10.28.4.137	10.28.4.137
139	10.28.4.138/32	10.28.4.138 – 10.28.4.138	10.28.4.138
140	10.28.4.139/32	10.28.4.139 – 10.28.4.139	10.28.4.139
141	10.28.4.140/32	10.28.4.140 – 10.28.4.140	10.28.4.140
142	10.28.4.141/32	10.28.4.141 – 10.28.4.141	10.28.4.141
143	10.28.4.142/32	10.28.4.142 – 10.28.4.142	10.28.4.142
144	10.28.4.143/32	10.28.4.143 – 10.28.4.143	10.28.4.143
145	10.28.4.144/32	10.28.4.144 – 10.28.4.144	10.28.4.144
146	10.28.4.145/32	10.28.4.145 – 10.28.4.145	10.28.4.145
147	10.28.4.146/32	10.28.4.146 – 10.28.4.146	10.28.4.146
148	10.28.4.147/32	10.28.4.147 – 10.28.4.147	10.28.4.147
149	10.28.4.148/32	10.28.4.148 – 10.28.4.148	10.28.4.148
150	10.28.4.149/32	10.28.4.149 – 10.28.4.149	10.28.4.149
151	10.28.4.150/32	10.28.4.150 – 10.28.4.150	10.28.4.150
152	10.28.4.151/32	10.28.4.151 – 10.28.4.151	10.28.4.151
153	10.28.4.152/32	10.28.4.152 – 10.28.4.152	10.28.4.152
154	10.28.4.153/32	10.28.4.153 – 10.28.4.153	10.28.4.153
155	10.28.4.154/32	10.28.4.154 – 10.28.4.154	10.28.4.154
156	10.28.4.155/32	10.28.4.155 – 10.28.4.155	10.28.4.155
157	10.28.4.156/32	10.28.4.156 – 10.28.4.156	10.28.4.156
158	10.28.4.157/32	10.28.4.157 – 10.28.4.157	10.28.4.157
159	10.28.4.158/32	10.28.4.158 – 10.28.4.158	10.28.4.158
160	10.28.4.159/32	10.28.4.159 – 10.28.4.159	10.28.4.159
161	10.28.4.160/32	10.28.4.160 – 10.28.4.160	10.28.4.160
162	10.28.4.161/32	10.28.4.161 – 10.28.4.161	10.28.4.161
163	10.28.4.162/32	10.28.4.162 – 10.28.4.162	10.28.4.162
164	10.28.4.163/32	10.28.4.163 – 10.28.4.163	10.28.4.163
165	10.28.4.164/32	10.28.4.164 – 10.28.4.164	10.28.4.164
166	10.28.4.165/32	10.28.4.165 – 10.28.4.165	10.28.4.165
167	10.28.4.166/32	10.28.4.166 – 10.28.4.166	10.28.4.166
168	10.28.4.167/32	10.28.4.167 – 10.28.4.167	10.28.4.167
169	10.28.4.168/32	10.28.4.168 – 10.28.4.168	10.28.4.168
170	10.28.4.169/32	10.28.4.169 – 10.28.4.169	10.28.4.169
171	10.28.4.170/32	10.28.4.170 – 10.28.4.170	10.28.4.170
172	10.28.4.171/32	10.28.4.171 – 10.28.4.171	10.28.4.171
173	10.28.4.172/32	10.28.4.172 – 10.28.4.172	10.28.4.172
174	10.28.4.173/32	10.28.4.173 – 10.28.4.173	10.28.4.173
175	10.28.4.174/32	10.28.4.174 – 10.28.4.174	10.28.4.174
176	10.28.4.175/32	10.28.4.175 – 10.28.4.175	10.28.4.175
177	10.28.4.176/32	10.28.4.176 – 10.28.4.176	10.28.4.176
178	10.28.4.177/32	10.28.4.177 – 10.28.4.177	10.28.4.177
179	10.28.4.178/32	10.28.4.178 – 10.28.4.178	10.28.4.178
180	10.28.4.179/32	10.28.4.179 – 10.28.4.179	10.28.4.179
181	10.28.4.180/32	10.28.4.180 – 10.28.4.180	10.28.4.180
182	10.28.4.181/32	10.28.4.181 – 10.28.4.181	10.28.4.181
183	10.28.4.182/32	10.28.4.182 – 10.28.4.182	10.28.4.182
184	10.28.4.183/32	10.28.4.183 – 10.28.4.183	10.28.4.183
185	10.28.4.184/32	10.28.4.184 – 10.28.4.184	10.28.4.184
186	10.28.4.185/32	10.28.4.185 – 10.28.4.185	10.28.4.185
187	10.28.4.186/32	10.28.4.186 – 10.28.4.186	10.28.4.186
188	10.28.4.187/32	10.28.4.187 – 10.28.4.187	10.28.4.187
189	10.28.4.188/32	10.28.4.188 – 10.28.4.188	10.28.4.188
190	10.28.4.189/32	10.28.4.189 – 10.28.4.189	10.28.4.189
191	10.28.4.190/32	10.28.4.190 – 10.28.4.190	10.28.4.190
192	10.28.4.191/32	10.28.4.191 – 10.28.4.191	10.28.4.191
193	10.28.4.192/32	10.28.4.192 – 10.28.4.192	10.28.4.192
194	10.28.4.193/32	10.28.4.193 – 10.28.4.193	10.28.4.193
195	10.28.4.194/32	10.28.4.194 – 10.28.4.194	10.28.4.194
196	10.28.4.195/32	10.28.4.195 – 10.28.4.195	10.28.4.195
197	10.28.4.196/32	10.28.4.196 – 10.28.4.196	10.28.4.196
198	10.28.4.197/32	10.28.4.197 – 10.28.4.197	10.28.4.197
199	10.28.4.198/32	10.28.4.198 – 10.28.4.198	10.28.4.198
200	10.28.4.199/32	10.28.4.199 – 10.28.4.199	10.28.4.199
201	10.28.4.200/32	10.28.4.200 – 10.28.4.200	10.28.4.200
202	10.28.4.201/32	10.28.4.201 – 10.28.4.201	10.28.4.201
203	10.28.4.202/32	10.28.4.202 – 10.28.4.202	10.28.4.202
204	10.28.4.203/32	10.28.4.203 – 10.28.4.203	10.28.4.203
205	10.28.4.204/32	10.28.4.204 – 10.28.4.204	10.28.4.204
206	10.28.4.205/32	10.28.4.205 – 10.28.4.205	10.28.4.205
207	10.28.4.206/32	10.28.4.206 – 10.28.4.206	10.28.4.206
208	10.28.4.207/32	10.28.4.207 – 10.28.4.207	10.28.4.207
209	10.28.4.208/32	10.28.4.208 – 10.28.4.208	10.28.4.208
210	10.28.4.209/32	10.28.4.209 – 10.28.4.209	10.28.4.209
211	10.28.4.210/32	10.28.4.210 – 10.28.4.210	10.28.4.210
212	10.28.4.211/32	10.28.4.211 – 10.28.4.211	10.28.4.211
213	10.28.4.212/32	10.28.4.212 – 10.28.4.212	10.28.4.212
214	10.28.4.213/32	10.28.4.213 – 10.28.4.213	10.28.4.213
215	10.28.4.214/32	10.28.4.214 – 10.28.4.214	10.28.4.214
216	10.28.4.215/32	10.28.4.215 – 10.28.4.215	10.28.4.215
217	10.28.4.216/32	10.28.4.216 – 10.28.4.216	10.28.4.216
218	10.28.4.217/32	10.28.4.217 – 10.28.4.217	10.28.4.217
219	10.28.4.218/32	10.28.4.218 – 10.28.4.218	10.28.4.218
220	10.28.4.219/32	10.28.4.219 – 10.28.4.219	10.28.4.219
221	10.28.4.220/32	10.28.4.220 – 10.28.4.220	10.28.4.220
222	10.28.4.221/32	10.28.4.221 – 10.28.4.221	10.28.4.221
223	10.28.4.222/32	10.28.4.222 – 10.28.4.222	10.28.4.222
224	10.28.4.223/32	10.28.4.223 – 10.28.4.223	10.28.4.223
225	10.28.4.224/32	10.28.4.224 – 10.28.4.224	10.28.4.224
226	10.28.4.225/32	10.28.4.225 – 10.28.4.225	10.28.4.225
227	10.28.4.226/32	10.28.4.226 – 10.28.4.226	10.28.4.226
228	10.28.4.227/32	10.28.4.227 – 10.28.4.227	10.28.4.227
229	10.28.4.228/32	10.28.4.228 – 10.28.4.228	10.28.4.228
230	10.28.4.229/32	10.28.4.229 – 10.28.4.229	10.28.4.229
231	10.28.4.230/32	10.28.4.230 – 10.28.4.230	10.28.4.230
232	10.28.4.231/32	10.28.4.231 – 10.28.4.231	10.28.4.231
233	10.28.4.232/32	10.28.4.232 – 10.28.4.232	10.28.4.232
234	10.28.4.233/32	10.28.4.233 – 10.28.4.233	10.28.4.233
235	10.28.4.234/32	10.28.4.234 – 10.28.4.234	10.28.4.234
236	10.28.4.235/32	10.28.4.235 – 10.28.4.235	10.28.4.235
237	10.28.4.236/32	10.28.4.236 – 10.28.4.236	10.28.4.236
238	10.28.4.237/32	10.28.4.237 – 10.28.4.237	10.28.4.237
239	10.28.4.238/32	10.28.4.238 – 10.28.4.238	10.28.4.238
240	10.28.4.239/32	10.28.4.239 – 10.28.4.239	10.28.4.239
241	10.28.4.240/32	10.28.4.240 – 10.28.4.240	10.28.4.240
242	10.28.4.241/32	10.28.4.241 – 10.28.4.241	10.28.4.241
243	10.28.4.242/32	10.28.4.242 – 10.28.4.242	10.28.4.242
244	10.28.4.243/32	10.28.4.243 – 10.28.4.243	10.28.4.243
245	10.28.4.244/32	10.28.4.244 – 10.28.4.244	10.28.4.244
246	10.28.4.245/32	10.28.4.245 – 10.28.4.245	10.28.4.245
247	10.28.4.246/32	10.28.4.246 – 10.28.4.246	10.28.4.246
248	10.28.4.247/32	10.28.4.247 – 10.28.4.247	10.28.4.247
249	10.28.4.248/32	10.28.4.248 – 10.28.4.248	10.28.4.248
250	10.28.4.249/32	10.28.4.249 – 10.28.4.249	10.28.4.249
251	10.28.4.250/32	10.28.4.250 – 10.28.4.250	10.28.4.250
252	10.28.4.251/32	10.28.4.251 – 10.28.4.251	10.28.4.251
253	10.28.4.252/32	10.28.4.252 – 10.28.4.252	10.28.4.252
254	10.28.4.253/32	10.28.4.253 – 10.28.4.253	10.28.4.253
255	10.28.4.254/32	10.28.4.254 – 10.28.4.254	10.28.4.254
256	10.28.4.255/32	10.28.4.255 – 10.28.4.255	10.28.4.255

showing 256 of 1,024

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →