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)10.167.29.0/24

network10.167.29.0/24

broadcast10.167.29.255

first host10.167.29.1

last host10.167.29.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.29.0/24

address00001010.10100111.00011101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.00011101.00000000

broadcast00001010.10100111.00011101.11111111

green = network part, grey = host part

hex0x0aa71d00

decimal178724096

reverse dns0.29.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:1d00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.29.0/32	10.167.29.0 – 10.167.29.0	10.167.29.0
2	10.167.29.1/32	10.167.29.1 – 10.167.29.1	10.167.29.1
3	10.167.29.2/32	10.167.29.2 – 10.167.29.2	10.167.29.2
4	10.167.29.3/32	10.167.29.3 – 10.167.29.3	10.167.29.3
5	10.167.29.4/32	10.167.29.4 – 10.167.29.4	10.167.29.4
6	10.167.29.5/32	10.167.29.5 – 10.167.29.5	10.167.29.5
7	10.167.29.6/32	10.167.29.6 – 10.167.29.6	10.167.29.6
8	10.167.29.7/32	10.167.29.7 – 10.167.29.7	10.167.29.7
9	10.167.29.8/32	10.167.29.8 – 10.167.29.8	10.167.29.8
10	10.167.29.9/32	10.167.29.9 – 10.167.29.9	10.167.29.9
11	10.167.29.10/32	10.167.29.10 – 10.167.29.10	10.167.29.10
12	10.167.29.11/32	10.167.29.11 – 10.167.29.11	10.167.29.11
13	10.167.29.12/32	10.167.29.12 – 10.167.29.12	10.167.29.12
14	10.167.29.13/32	10.167.29.13 – 10.167.29.13	10.167.29.13
15	10.167.29.14/32	10.167.29.14 – 10.167.29.14	10.167.29.14
16	10.167.29.15/32	10.167.29.15 – 10.167.29.15	10.167.29.15
17	10.167.29.16/32	10.167.29.16 – 10.167.29.16	10.167.29.16
18	10.167.29.17/32	10.167.29.17 – 10.167.29.17	10.167.29.17
19	10.167.29.18/32	10.167.29.18 – 10.167.29.18	10.167.29.18
20	10.167.29.19/32	10.167.29.19 – 10.167.29.19	10.167.29.19
21	10.167.29.20/32	10.167.29.20 – 10.167.29.20	10.167.29.20
22	10.167.29.21/32	10.167.29.21 – 10.167.29.21	10.167.29.21
23	10.167.29.22/32	10.167.29.22 – 10.167.29.22	10.167.29.22
24	10.167.29.23/32	10.167.29.23 – 10.167.29.23	10.167.29.23
25	10.167.29.24/32	10.167.29.24 – 10.167.29.24	10.167.29.24
26	10.167.29.25/32	10.167.29.25 – 10.167.29.25	10.167.29.25
27	10.167.29.26/32	10.167.29.26 – 10.167.29.26	10.167.29.26
28	10.167.29.27/32	10.167.29.27 – 10.167.29.27	10.167.29.27
29	10.167.29.28/32	10.167.29.28 – 10.167.29.28	10.167.29.28
30	10.167.29.29/32	10.167.29.29 – 10.167.29.29	10.167.29.29
31	10.167.29.30/32	10.167.29.30 – 10.167.29.30	10.167.29.30
32	10.167.29.31/32	10.167.29.31 – 10.167.29.31	10.167.29.31
33	10.167.29.32/32	10.167.29.32 – 10.167.29.32	10.167.29.32
34	10.167.29.33/32	10.167.29.33 – 10.167.29.33	10.167.29.33
35	10.167.29.34/32	10.167.29.34 – 10.167.29.34	10.167.29.34
36	10.167.29.35/32	10.167.29.35 – 10.167.29.35	10.167.29.35
37	10.167.29.36/32	10.167.29.36 – 10.167.29.36	10.167.29.36
38	10.167.29.37/32	10.167.29.37 – 10.167.29.37	10.167.29.37
39	10.167.29.38/32	10.167.29.38 – 10.167.29.38	10.167.29.38
40	10.167.29.39/32	10.167.29.39 – 10.167.29.39	10.167.29.39
41	10.167.29.40/32	10.167.29.40 – 10.167.29.40	10.167.29.40
42	10.167.29.41/32	10.167.29.41 – 10.167.29.41	10.167.29.41
43	10.167.29.42/32	10.167.29.42 – 10.167.29.42	10.167.29.42
44	10.167.29.43/32	10.167.29.43 – 10.167.29.43	10.167.29.43
45	10.167.29.44/32	10.167.29.44 – 10.167.29.44	10.167.29.44
46	10.167.29.45/32	10.167.29.45 – 10.167.29.45	10.167.29.45
47	10.167.29.46/32	10.167.29.46 – 10.167.29.46	10.167.29.46
48	10.167.29.47/32	10.167.29.47 – 10.167.29.47	10.167.29.47
49	10.167.29.48/32	10.167.29.48 – 10.167.29.48	10.167.29.48
50	10.167.29.49/32	10.167.29.49 – 10.167.29.49	10.167.29.49
51	10.167.29.50/32	10.167.29.50 – 10.167.29.50	10.167.29.50
52	10.167.29.51/32	10.167.29.51 – 10.167.29.51	10.167.29.51
53	10.167.29.52/32	10.167.29.52 – 10.167.29.52	10.167.29.52
54	10.167.29.53/32	10.167.29.53 – 10.167.29.53	10.167.29.53
55	10.167.29.54/32	10.167.29.54 – 10.167.29.54	10.167.29.54
56	10.167.29.55/32	10.167.29.55 – 10.167.29.55	10.167.29.55
57	10.167.29.56/32	10.167.29.56 – 10.167.29.56	10.167.29.56
58	10.167.29.57/32	10.167.29.57 – 10.167.29.57	10.167.29.57
59	10.167.29.58/32	10.167.29.58 – 10.167.29.58	10.167.29.58
60	10.167.29.59/32	10.167.29.59 – 10.167.29.59	10.167.29.59
61	10.167.29.60/32	10.167.29.60 – 10.167.29.60	10.167.29.60
62	10.167.29.61/32	10.167.29.61 – 10.167.29.61	10.167.29.61
63	10.167.29.62/32	10.167.29.62 – 10.167.29.62	10.167.29.62
64	10.167.29.63/32	10.167.29.63 – 10.167.29.63	10.167.29.63
65	10.167.29.64/32	10.167.29.64 – 10.167.29.64	10.167.29.64
66	10.167.29.65/32	10.167.29.65 – 10.167.29.65	10.167.29.65
67	10.167.29.66/32	10.167.29.66 – 10.167.29.66	10.167.29.66
68	10.167.29.67/32	10.167.29.67 – 10.167.29.67	10.167.29.67
69	10.167.29.68/32	10.167.29.68 – 10.167.29.68	10.167.29.68
70	10.167.29.69/32	10.167.29.69 – 10.167.29.69	10.167.29.69
71	10.167.29.70/32	10.167.29.70 – 10.167.29.70	10.167.29.70
72	10.167.29.71/32	10.167.29.71 – 10.167.29.71	10.167.29.71
73	10.167.29.72/32	10.167.29.72 – 10.167.29.72	10.167.29.72
74	10.167.29.73/32	10.167.29.73 – 10.167.29.73	10.167.29.73
75	10.167.29.74/32	10.167.29.74 – 10.167.29.74	10.167.29.74
76	10.167.29.75/32	10.167.29.75 – 10.167.29.75	10.167.29.75
77	10.167.29.76/32	10.167.29.76 – 10.167.29.76	10.167.29.76
78	10.167.29.77/32	10.167.29.77 – 10.167.29.77	10.167.29.77
79	10.167.29.78/32	10.167.29.78 – 10.167.29.78	10.167.29.78
80	10.167.29.79/32	10.167.29.79 – 10.167.29.79	10.167.29.79
81	10.167.29.80/32	10.167.29.80 – 10.167.29.80	10.167.29.80
82	10.167.29.81/32	10.167.29.81 – 10.167.29.81	10.167.29.81
83	10.167.29.82/32	10.167.29.82 – 10.167.29.82	10.167.29.82
84	10.167.29.83/32	10.167.29.83 – 10.167.29.83	10.167.29.83
85	10.167.29.84/32	10.167.29.84 – 10.167.29.84	10.167.29.84
86	10.167.29.85/32	10.167.29.85 – 10.167.29.85	10.167.29.85
87	10.167.29.86/32	10.167.29.86 – 10.167.29.86	10.167.29.86
88	10.167.29.87/32	10.167.29.87 – 10.167.29.87	10.167.29.87
89	10.167.29.88/32	10.167.29.88 – 10.167.29.88	10.167.29.88
90	10.167.29.89/32	10.167.29.89 – 10.167.29.89	10.167.29.89
91	10.167.29.90/32	10.167.29.90 – 10.167.29.90	10.167.29.90
92	10.167.29.91/32	10.167.29.91 – 10.167.29.91	10.167.29.91
93	10.167.29.92/32	10.167.29.92 – 10.167.29.92	10.167.29.92
94	10.167.29.93/32	10.167.29.93 – 10.167.29.93	10.167.29.93
95	10.167.29.94/32	10.167.29.94 – 10.167.29.94	10.167.29.94
96	10.167.29.95/32	10.167.29.95 – 10.167.29.95	10.167.29.95
97	10.167.29.96/32	10.167.29.96 – 10.167.29.96	10.167.29.96
98	10.167.29.97/32	10.167.29.97 – 10.167.29.97	10.167.29.97
99	10.167.29.98/32	10.167.29.98 – 10.167.29.98	10.167.29.98
100	10.167.29.99/32	10.167.29.99 – 10.167.29.99	10.167.29.99
101	10.167.29.100/32	10.167.29.100 – 10.167.29.100	10.167.29.100
102	10.167.29.101/32	10.167.29.101 – 10.167.29.101	10.167.29.101
103	10.167.29.102/32	10.167.29.102 – 10.167.29.102	10.167.29.102
104	10.167.29.103/32	10.167.29.103 – 10.167.29.103	10.167.29.103
105	10.167.29.104/32	10.167.29.104 – 10.167.29.104	10.167.29.104
106	10.167.29.105/32	10.167.29.105 – 10.167.29.105	10.167.29.105
107	10.167.29.106/32	10.167.29.106 – 10.167.29.106	10.167.29.106
108	10.167.29.107/32	10.167.29.107 – 10.167.29.107	10.167.29.107
109	10.167.29.108/32	10.167.29.108 – 10.167.29.108	10.167.29.108
110	10.167.29.109/32	10.167.29.109 – 10.167.29.109	10.167.29.109
111	10.167.29.110/32	10.167.29.110 – 10.167.29.110	10.167.29.110
112	10.167.29.111/32	10.167.29.111 – 10.167.29.111	10.167.29.111
113	10.167.29.112/32	10.167.29.112 – 10.167.29.112	10.167.29.112
114	10.167.29.113/32	10.167.29.113 – 10.167.29.113	10.167.29.113
115	10.167.29.114/32	10.167.29.114 – 10.167.29.114	10.167.29.114
116	10.167.29.115/32	10.167.29.115 – 10.167.29.115	10.167.29.115
117	10.167.29.116/32	10.167.29.116 – 10.167.29.116	10.167.29.116
118	10.167.29.117/32	10.167.29.117 – 10.167.29.117	10.167.29.117
119	10.167.29.118/32	10.167.29.118 – 10.167.29.118	10.167.29.118
120	10.167.29.119/32	10.167.29.119 – 10.167.29.119	10.167.29.119
121	10.167.29.120/32	10.167.29.120 – 10.167.29.120	10.167.29.120
122	10.167.29.121/32	10.167.29.121 – 10.167.29.121	10.167.29.121
123	10.167.29.122/32	10.167.29.122 – 10.167.29.122	10.167.29.122
124	10.167.29.123/32	10.167.29.123 – 10.167.29.123	10.167.29.123
125	10.167.29.124/32	10.167.29.124 – 10.167.29.124	10.167.29.124
126	10.167.29.125/32	10.167.29.125 – 10.167.29.125	10.167.29.125
127	10.167.29.126/32	10.167.29.126 – 10.167.29.126	10.167.29.126
128	10.167.29.127/32	10.167.29.127 – 10.167.29.127	10.167.29.127
129	10.167.29.128/32	10.167.29.128 – 10.167.29.128	10.167.29.128
130	10.167.29.129/32	10.167.29.129 – 10.167.29.129	10.167.29.129
131	10.167.29.130/32	10.167.29.130 – 10.167.29.130	10.167.29.130
132	10.167.29.131/32	10.167.29.131 – 10.167.29.131	10.167.29.131
133	10.167.29.132/32	10.167.29.132 – 10.167.29.132	10.167.29.132
134	10.167.29.133/32	10.167.29.133 – 10.167.29.133	10.167.29.133
135	10.167.29.134/32	10.167.29.134 – 10.167.29.134	10.167.29.134
136	10.167.29.135/32	10.167.29.135 – 10.167.29.135	10.167.29.135
137	10.167.29.136/32	10.167.29.136 – 10.167.29.136	10.167.29.136
138	10.167.29.137/32	10.167.29.137 – 10.167.29.137	10.167.29.137
139	10.167.29.138/32	10.167.29.138 – 10.167.29.138	10.167.29.138
140	10.167.29.139/32	10.167.29.139 – 10.167.29.139	10.167.29.139
141	10.167.29.140/32	10.167.29.140 – 10.167.29.140	10.167.29.140
142	10.167.29.141/32	10.167.29.141 – 10.167.29.141	10.167.29.141
143	10.167.29.142/32	10.167.29.142 – 10.167.29.142	10.167.29.142
144	10.167.29.143/32	10.167.29.143 – 10.167.29.143	10.167.29.143
145	10.167.29.144/32	10.167.29.144 – 10.167.29.144	10.167.29.144
146	10.167.29.145/32	10.167.29.145 – 10.167.29.145	10.167.29.145
147	10.167.29.146/32	10.167.29.146 – 10.167.29.146	10.167.29.146
148	10.167.29.147/32	10.167.29.147 – 10.167.29.147	10.167.29.147
149	10.167.29.148/32	10.167.29.148 – 10.167.29.148	10.167.29.148
150	10.167.29.149/32	10.167.29.149 – 10.167.29.149	10.167.29.149
151	10.167.29.150/32	10.167.29.150 – 10.167.29.150	10.167.29.150
152	10.167.29.151/32	10.167.29.151 – 10.167.29.151	10.167.29.151
153	10.167.29.152/32	10.167.29.152 – 10.167.29.152	10.167.29.152
154	10.167.29.153/32	10.167.29.153 – 10.167.29.153	10.167.29.153
155	10.167.29.154/32	10.167.29.154 – 10.167.29.154	10.167.29.154
156	10.167.29.155/32	10.167.29.155 – 10.167.29.155	10.167.29.155
157	10.167.29.156/32	10.167.29.156 – 10.167.29.156	10.167.29.156
158	10.167.29.157/32	10.167.29.157 – 10.167.29.157	10.167.29.157
159	10.167.29.158/32	10.167.29.158 – 10.167.29.158	10.167.29.158
160	10.167.29.159/32	10.167.29.159 – 10.167.29.159	10.167.29.159
161	10.167.29.160/32	10.167.29.160 – 10.167.29.160	10.167.29.160
162	10.167.29.161/32	10.167.29.161 – 10.167.29.161	10.167.29.161
163	10.167.29.162/32	10.167.29.162 – 10.167.29.162	10.167.29.162
164	10.167.29.163/32	10.167.29.163 – 10.167.29.163	10.167.29.163
165	10.167.29.164/32	10.167.29.164 – 10.167.29.164	10.167.29.164
166	10.167.29.165/32	10.167.29.165 – 10.167.29.165	10.167.29.165
167	10.167.29.166/32	10.167.29.166 – 10.167.29.166	10.167.29.166
168	10.167.29.167/32	10.167.29.167 – 10.167.29.167	10.167.29.167
169	10.167.29.168/32	10.167.29.168 – 10.167.29.168	10.167.29.168
170	10.167.29.169/32	10.167.29.169 – 10.167.29.169	10.167.29.169
171	10.167.29.170/32	10.167.29.170 – 10.167.29.170	10.167.29.170
172	10.167.29.171/32	10.167.29.171 – 10.167.29.171	10.167.29.171
173	10.167.29.172/32	10.167.29.172 – 10.167.29.172	10.167.29.172
174	10.167.29.173/32	10.167.29.173 – 10.167.29.173	10.167.29.173
175	10.167.29.174/32	10.167.29.174 – 10.167.29.174	10.167.29.174
176	10.167.29.175/32	10.167.29.175 – 10.167.29.175	10.167.29.175
177	10.167.29.176/32	10.167.29.176 – 10.167.29.176	10.167.29.176
178	10.167.29.177/32	10.167.29.177 – 10.167.29.177	10.167.29.177
179	10.167.29.178/32	10.167.29.178 – 10.167.29.178	10.167.29.178
180	10.167.29.179/32	10.167.29.179 – 10.167.29.179	10.167.29.179
181	10.167.29.180/32	10.167.29.180 – 10.167.29.180	10.167.29.180
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190	10.167.29.189/32	10.167.29.189 – 10.167.29.189	10.167.29.189
191	10.167.29.190/32	10.167.29.190 – 10.167.29.190	10.167.29.190
192	10.167.29.191/32	10.167.29.191 – 10.167.29.191	10.167.29.191
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197	10.167.29.196/32	10.167.29.196 – 10.167.29.196	10.167.29.196
198	10.167.29.197/32	10.167.29.197 – 10.167.29.197	10.167.29.197
199	10.167.29.198/32	10.167.29.198 – 10.167.29.198	10.167.29.198
200	10.167.29.199/32	10.167.29.199 – 10.167.29.199	10.167.29.199
201	10.167.29.200/32	10.167.29.200 – 10.167.29.200	10.167.29.200
202	10.167.29.201/32	10.167.29.201 – 10.167.29.201	10.167.29.201
203	10.167.29.202/32	10.167.29.202 – 10.167.29.202	10.167.29.202
204	10.167.29.203/32	10.167.29.203 – 10.167.29.203	10.167.29.203
205	10.167.29.204/32	10.167.29.204 – 10.167.29.204	10.167.29.204
206	10.167.29.205/32	10.167.29.205 – 10.167.29.205	10.167.29.205
207	10.167.29.206/32	10.167.29.206 – 10.167.29.206	10.167.29.206
208	10.167.29.207/32	10.167.29.207 – 10.167.29.207	10.167.29.207
209	10.167.29.208/32	10.167.29.208 – 10.167.29.208	10.167.29.208
210	10.167.29.209/32	10.167.29.209 – 10.167.29.209	10.167.29.209
211	10.167.29.210/32	10.167.29.210 – 10.167.29.210	10.167.29.210
212	10.167.29.211/32	10.167.29.211 – 10.167.29.211	10.167.29.211
213	10.167.29.212/32	10.167.29.212 – 10.167.29.212	10.167.29.212
214	10.167.29.213/32	10.167.29.213 – 10.167.29.213	10.167.29.213
215	10.167.29.214/32	10.167.29.214 – 10.167.29.214	10.167.29.214
216	10.167.29.215/32	10.167.29.215 – 10.167.29.215	10.167.29.215
217	10.167.29.216/32	10.167.29.216 – 10.167.29.216	10.167.29.216
218	10.167.29.217/32	10.167.29.217 – 10.167.29.217	10.167.29.217
219	10.167.29.218/32	10.167.29.218 – 10.167.29.218	10.167.29.218
220	10.167.29.219/32	10.167.29.219 – 10.167.29.219	10.167.29.219
221	10.167.29.220/32	10.167.29.220 – 10.167.29.220	10.167.29.220
222	10.167.29.221/32	10.167.29.221 – 10.167.29.221	10.167.29.221
223	10.167.29.222/32	10.167.29.222 – 10.167.29.222	10.167.29.222
224	10.167.29.223/32	10.167.29.223 – 10.167.29.223	10.167.29.223
225	10.167.29.224/32	10.167.29.224 – 10.167.29.224	10.167.29.224
226	10.167.29.225/32	10.167.29.225 – 10.167.29.225	10.167.29.225
227	10.167.29.226/32	10.167.29.226 – 10.167.29.226	10.167.29.226
228	10.167.29.227/32	10.167.29.227 – 10.167.29.227	10.167.29.227
229	10.167.29.228/32	10.167.29.228 – 10.167.29.228	10.167.29.228
230	10.167.29.229/32	10.167.29.229 – 10.167.29.229	10.167.29.229
231	10.167.29.230/32	10.167.29.230 – 10.167.29.230	10.167.29.230
232	10.167.29.231/32	10.167.29.231 – 10.167.29.231	10.167.29.231
233	10.167.29.232/32	10.167.29.232 – 10.167.29.232	10.167.29.232
234	10.167.29.233/32	10.167.29.233 – 10.167.29.233	10.167.29.233
235	10.167.29.234/32	10.167.29.234 – 10.167.29.234	10.167.29.234
236	10.167.29.235/32	10.167.29.235 – 10.167.29.235	10.167.29.235
237	10.167.29.236/32	10.167.29.236 – 10.167.29.236	10.167.29.236
238	10.167.29.237/32	10.167.29.237 – 10.167.29.237	10.167.29.237
239	10.167.29.238/32	10.167.29.238 – 10.167.29.238	10.167.29.238
240	10.167.29.239/32	10.167.29.239 – 10.167.29.239	10.167.29.239
241	10.167.29.240/32	10.167.29.240 – 10.167.29.240	10.167.29.240
242	10.167.29.241/32	10.167.29.241 – 10.167.29.241	10.167.29.241
243	10.167.29.242/32	10.167.29.242 – 10.167.29.242	10.167.29.242
244	10.167.29.243/32	10.167.29.243 – 10.167.29.243	10.167.29.243
245	10.167.29.244/32	10.167.29.244 – 10.167.29.244	10.167.29.244
246	10.167.29.245/32	10.167.29.245 – 10.167.29.245	10.167.29.245
247	10.167.29.246/32	10.167.29.246 – 10.167.29.246	10.167.29.246
248	10.167.29.247/32	10.167.29.247 – 10.167.29.247	10.167.29.247
249	10.167.29.248/32	10.167.29.248 – 10.167.29.248	10.167.29.248
250	10.167.29.249/32	10.167.29.249 – 10.167.29.249	10.167.29.249
251	10.167.29.250/32	10.167.29.250 – 10.167.29.250	10.167.29.250
252	10.167.29.251/32	10.167.29.251 – 10.167.29.251	10.167.29.251
253	10.167.29.252/32	10.167.29.252 – 10.167.29.252	10.167.29.252
254	10.167.29.253/32	10.167.29.253 – 10.167.29.253	10.167.29.253
255	10.167.29.254/32	10.167.29.254 – 10.167.29.254	10.167.29.254
256	10.167.29.255/32	10.167.29.255 – 10.167.29.255	10.167.29.255

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 →