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)10.2.44.0/24

network10.2.44.0/24

broadcast10.2.44.255

first host10.2.44.1

last host10.2.44.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.44.0/24

address00001010.00000010.00101100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.00101100.00000000

broadcast00001010.00000010.00101100.11111111

green = network part, grey = host part

hex0x0a022c00

decimal167914496

reverse dns0.44.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:2c00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.44.0/32	10.2.44.0 – 10.2.44.0	10.2.44.0
2	10.2.44.1/32	10.2.44.1 – 10.2.44.1	10.2.44.1
3	10.2.44.2/32	10.2.44.2 – 10.2.44.2	10.2.44.2
4	10.2.44.3/32	10.2.44.3 – 10.2.44.3	10.2.44.3
5	10.2.44.4/32	10.2.44.4 – 10.2.44.4	10.2.44.4
6	10.2.44.5/32	10.2.44.5 – 10.2.44.5	10.2.44.5
7	10.2.44.6/32	10.2.44.6 – 10.2.44.6	10.2.44.6
8	10.2.44.7/32	10.2.44.7 – 10.2.44.7	10.2.44.7
9	10.2.44.8/32	10.2.44.8 – 10.2.44.8	10.2.44.8
10	10.2.44.9/32	10.2.44.9 – 10.2.44.9	10.2.44.9
11	10.2.44.10/32	10.2.44.10 – 10.2.44.10	10.2.44.10
12	10.2.44.11/32	10.2.44.11 – 10.2.44.11	10.2.44.11
13	10.2.44.12/32	10.2.44.12 – 10.2.44.12	10.2.44.12
14	10.2.44.13/32	10.2.44.13 – 10.2.44.13	10.2.44.13
15	10.2.44.14/32	10.2.44.14 – 10.2.44.14	10.2.44.14
16	10.2.44.15/32	10.2.44.15 – 10.2.44.15	10.2.44.15
17	10.2.44.16/32	10.2.44.16 – 10.2.44.16	10.2.44.16
18	10.2.44.17/32	10.2.44.17 – 10.2.44.17	10.2.44.17
19	10.2.44.18/32	10.2.44.18 – 10.2.44.18	10.2.44.18
20	10.2.44.19/32	10.2.44.19 – 10.2.44.19	10.2.44.19
21	10.2.44.20/32	10.2.44.20 – 10.2.44.20	10.2.44.20
22	10.2.44.21/32	10.2.44.21 – 10.2.44.21	10.2.44.21
23	10.2.44.22/32	10.2.44.22 – 10.2.44.22	10.2.44.22
24	10.2.44.23/32	10.2.44.23 – 10.2.44.23	10.2.44.23
25	10.2.44.24/32	10.2.44.24 – 10.2.44.24	10.2.44.24
26	10.2.44.25/32	10.2.44.25 – 10.2.44.25	10.2.44.25
27	10.2.44.26/32	10.2.44.26 – 10.2.44.26	10.2.44.26
28	10.2.44.27/32	10.2.44.27 – 10.2.44.27	10.2.44.27
29	10.2.44.28/32	10.2.44.28 – 10.2.44.28	10.2.44.28
30	10.2.44.29/32	10.2.44.29 – 10.2.44.29	10.2.44.29
31	10.2.44.30/32	10.2.44.30 – 10.2.44.30	10.2.44.30
32	10.2.44.31/32	10.2.44.31 – 10.2.44.31	10.2.44.31
33	10.2.44.32/32	10.2.44.32 – 10.2.44.32	10.2.44.32
34	10.2.44.33/32	10.2.44.33 – 10.2.44.33	10.2.44.33
35	10.2.44.34/32	10.2.44.34 – 10.2.44.34	10.2.44.34
36	10.2.44.35/32	10.2.44.35 – 10.2.44.35	10.2.44.35
37	10.2.44.36/32	10.2.44.36 – 10.2.44.36	10.2.44.36
38	10.2.44.37/32	10.2.44.37 – 10.2.44.37	10.2.44.37
39	10.2.44.38/32	10.2.44.38 – 10.2.44.38	10.2.44.38
40	10.2.44.39/32	10.2.44.39 – 10.2.44.39	10.2.44.39
41	10.2.44.40/32	10.2.44.40 – 10.2.44.40	10.2.44.40
42	10.2.44.41/32	10.2.44.41 – 10.2.44.41	10.2.44.41
43	10.2.44.42/32	10.2.44.42 – 10.2.44.42	10.2.44.42
44	10.2.44.43/32	10.2.44.43 – 10.2.44.43	10.2.44.43
45	10.2.44.44/32	10.2.44.44 – 10.2.44.44	10.2.44.44
46	10.2.44.45/32	10.2.44.45 – 10.2.44.45	10.2.44.45
47	10.2.44.46/32	10.2.44.46 – 10.2.44.46	10.2.44.46
48	10.2.44.47/32	10.2.44.47 – 10.2.44.47	10.2.44.47
49	10.2.44.48/32	10.2.44.48 – 10.2.44.48	10.2.44.48
50	10.2.44.49/32	10.2.44.49 – 10.2.44.49	10.2.44.49
51	10.2.44.50/32	10.2.44.50 – 10.2.44.50	10.2.44.50
52	10.2.44.51/32	10.2.44.51 – 10.2.44.51	10.2.44.51
53	10.2.44.52/32	10.2.44.52 – 10.2.44.52	10.2.44.52
54	10.2.44.53/32	10.2.44.53 – 10.2.44.53	10.2.44.53
55	10.2.44.54/32	10.2.44.54 – 10.2.44.54	10.2.44.54
56	10.2.44.55/32	10.2.44.55 – 10.2.44.55	10.2.44.55
57	10.2.44.56/32	10.2.44.56 – 10.2.44.56	10.2.44.56
58	10.2.44.57/32	10.2.44.57 – 10.2.44.57	10.2.44.57
59	10.2.44.58/32	10.2.44.58 – 10.2.44.58	10.2.44.58
60	10.2.44.59/32	10.2.44.59 – 10.2.44.59	10.2.44.59
61	10.2.44.60/32	10.2.44.60 – 10.2.44.60	10.2.44.60
62	10.2.44.61/32	10.2.44.61 – 10.2.44.61	10.2.44.61
63	10.2.44.62/32	10.2.44.62 – 10.2.44.62	10.2.44.62
64	10.2.44.63/32	10.2.44.63 – 10.2.44.63	10.2.44.63
65	10.2.44.64/32	10.2.44.64 – 10.2.44.64	10.2.44.64
66	10.2.44.65/32	10.2.44.65 – 10.2.44.65	10.2.44.65
67	10.2.44.66/32	10.2.44.66 – 10.2.44.66	10.2.44.66
68	10.2.44.67/32	10.2.44.67 – 10.2.44.67	10.2.44.67
69	10.2.44.68/32	10.2.44.68 – 10.2.44.68	10.2.44.68
70	10.2.44.69/32	10.2.44.69 – 10.2.44.69	10.2.44.69
71	10.2.44.70/32	10.2.44.70 – 10.2.44.70	10.2.44.70
72	10.2.44.71/32	10.2.44.71 – 10.2.44.71	10.2.44.71
73	10.2.44.72/32	10.2.44.72 – 10.2.44.72	10.2.44.72
74	10.2.44.73/32	10.2.44.73 – 10.2.44.73	10.2.44.73
75	10.2.44.74/32	10.2.44.74 – 10.2.44.74	10.2.44.74
76	10.2.44.75/32	10.2.44.75 – 10.2.44.75	10.2.44.75
77	10.2.44.76/32	10.2.44.76 – 10.2.44.76	10.2.44.76
78	10.2.44.77/32	10.2.44.77 – 10.2.44.77	10.2.44.77
79	10.2.44.78/32	10.2.44.78 – 10.2.44.78	10.2.44.78
80	10.2.44.79/32	10.2.44.79 – 10.2.44.79	10.2.44.79
81	10.2.44.80/32	10.2.44.80 – 10.2.44.80	10.2.44.80
82	10.2.44.81/32	10.2.44.81 – 10.2.44.81	10.2.44.81
83	10.2.44.82/32	10.2.44.82 – 10.2.44.82	10.2.44.82
84	10.2.44.83/32	10.2.44.83 – 10.2.44.83	10.2.44.83
85	10.2.44.84/32	10.2.44.84 – 10.2.44.84	10.2.44.84
86	10.2.44.85/32	10.2.44.85 – 10.2.44.85	10.2.44.85
87	10.2.44.86/32	10.2.44.86 – 10.2.44.86	10.2.44.86
88	10.2.44.87/32	10.2.44.87 – 10.2.44.87	10.2.44.87
89	10.2.44.88/32	10.2.44.88 – 10.2.44.88	10.2.44.88
90	10.2.44.89/32	10.2.44.89 – 10.2.44.89	10.2.44.89
91	10.2.44.90/32	10.2.44.90 – 10.2.44.90	10.2.44.90
92	10.2.44.91/32	10.2.44.91 – 10.2.44.91	10.2.44.91
93	10.2.44.92/32	10.2.44.92 – 10.2.44.92	10.2.44.92
94	10.2.44.93/32	10.2.44.93 – 10.2.44.93	10.2.44.93
95	10.2.44.94/32	10.2.44.94 – 10.2.44.94	10.2.44.94
96	10.2.44.95/32	10.2.44.95 – 10.2.44.95	10.2.44.95
97	10.2.44.96/32	10.2.44.96 – 10.2.44.96	10.2.44.96
98	10.2.44.97/32	10.2.44.97 – 10.2.44.97	10.2.44.97
99	10.2.44.98/32	10.2.44.98 – 10.2.44.98	10.2.44.98
100	10.2.44.99/32	10.2.44.99 – 10.2.44.99	10.2.44.99
101	10.2.44.100/32	10.2.44.100 – 10.2.44.100	10.2.44.100
102	10.2.44.101/32	10.2.44.101 – 10.2.44.101	10.2.44.101
103	10.2.44.102/32	10.2.44.102 – 10.2.44.102	10.2.44.102
104	10.2.44.103/32	10.2.44.103 – 10.2.44.103	10.2.44.103
105	10.2.44.104/32	10.2.44.104 – 10.2.44.104	10.2.44.104
106	10.2.44.105/32	10.2.44.105 – 10.2.44.105	10.2.44.105
107	10.2.44.106/32	10.2.44.106 – 10.2.44.106	10.2.44.106
108	10.2.44.107/32	10.2.44.107 – 10.2.44.107	10.2.44.107
109	10.2.44.108/32	10.2.44.108 – 10.2.44.108	10.2.44.108
110	10.2.44.109/32	10.2.44.109 – 10.2.44.109	10.2.44.109
111	10.2.44.110/32	10.2.44.110 – 10.2.44.110	10.2.44.110
112	10.2.44.111/32	10.2.44.111 – 10.2.44.111	10.2.44.111
113	10.2.44.112/32	10.2.44.112 – 10.2.44.112	10.2.44.112
114	10.2.44.113/32	10.2.44.113 – 10.2.44.113	10.2.44.113
115	10.2.44.114/32	10.2.44.114 – 10.2.44.114	10.2.44.114
116	10.2.44.115/32	10.2.44.115 – 10.2.44.115	10.2.44.115
117	10.2.44.116/32	10.2.44.116 – 10.2.44.116	10.2.44.116
118	10.2.44.117/32	10.2.44.117 – 10.2.44.117	10.2.44.117
119	10.2.44.118/32	10.2.44.118 – 10.2.44.118	10.2.44.118
120	10.2.44.119/32	10.2.44.119 – 10.2.44.119	10.2.44.119
121	10.2.44.120/32	10.2.44.120 – 10.2.44.120	10.2.44.120
122	10.2.44.121/32	10.2.44.121 – 10.2.44.121	10.2.44.121
123	10.2.44.122/32	10.2.44.122 – 10.2.44.122	10.2.44.122
124	10.2.44.123/32	10.2.44.123 – 10.2.44.123	10.2.44.123
125	10.2.44.124/32	10.2.44.124 – 10.2.44.124	10.2.44.124
126	10.2.44.125/32	10.2.44.125 – 10.2.44.125	10.2.44.125
127	10.2.44.126/32	10.2.44.126 – 10.2.44.126	10.2.44.126
128	10.2.44.127/32	10.2.44.127 – 10.2.44.127	10.2.44.127
129	10.2.44.128/32	10.2.44.128 – 10.2.44.128	10.2.44.128
130	10.2.44.129/32	10.2.44.129 – 10.2.44.129	10.2.44.129
131	10.2.44.130/32	10.2.44.130 – 10.2.44.130	10.2.44.130
132	10.2.44.131/32	10.2.44.131 – 10.2.44.131	10.2.44.131
133	10.2.44.132/32	10.2.44.132 – 10.2.44.132	10.2.44.132
134	10.2.44.133/32	10.2.44.133 – 10.2.44.133	10.2.44.133
135	10.2.44.134/32	10.2.44.134 – 10.2.44.134	10.2.44.134
136	10.2.44.135/32	10.2.44.135 – 10.2.44.135	10.2.44.135
137	10.2.44.136/32	10.2.44.136 – 10.2.44.136	10.2.44.136
138	10.2.44.137/32	10.2.44.137 – 10.2.44.137	10.2.44.137
139	10.2.44.138/32	10.2.44.138 – 10.2.44.138	10.2.44.138
140	10.2.44.139/32	10.2.44.139 – 10.2.44.139	10.2.44.139
141	10.2.44.140/32	10.2.44.140 – 10.2.44.140	10.2.44.140
142	10.2.44.141/32	10.2.44.141 – 10.2.44.141	10.2.44.141
143	10.2.44.142/32	10.2.44.142 – 10.2.44.142	10.2.44.142
144	10.2.44.143/32	10.2.44.143 – 10.2.44.143	10.2.44.143
145	10.2.44.144/32	10.2.44.144 – 10.2.44.144	10.2.44.144
146	10.2.44.145/32	10.2.44.145 – 10.2.44.145	10.2.44.145
147	10.2.44.146/32	10.2.44.146 – 10.2.44.146	10.2.44.146
148	10.2.44.147/32	10.2.44.147 – 10.2.44.147	10.2.44.147
149	10.2.44.148/32	10.2.44.148 – 10.2.44.148	10.2.44.148
150	10.2.44.149/32	10.2.44.149 – 10.2.44.149	10.2.44.149
151	10.2.44.150/32	10.2.44.150 – 10.2.44.150	10.2.44.150
152	10.2.44.151/32	10.2.44.151 – 10.2.44.151	10.2.44.151
153	10.2.44.152/32	10.2.44.152 – 10.2.44.152	10.2.44.152
154	10.2.44.153/32	10.2.44.153 – 10.2.44.153	10.2.44.153
155	10.2.44.154/32	10.2.44.154 – 10.2.44.154	10.2.44.154
156	10.2.44.155/32	10.2.44.155 – 10.2.44.155	10.2.44.155
157	10.2.44.156/32	10.2.44.156 – 10.2.44.156	10.2.44.156
158	10.2.44.157/32	10.2.44.157 – 10.2.44.157	10.2.44.157
159	10.2.44.158/32	10.2.44.158 – 10.2.44.158	10.2.44.158
160	10.2.44.159/32	10.2.44.159 – 10.2.44.159	10.2.44.159
161	10.2.44.160/32	10.2.44.160 – 10.2.44.160	10.2.44.160
162	10.2.44.161/32	10.2.44.161 – 10.2.44.161	10.2.44.161
163	10.2.44.162/32	10.2.44.162 – 10.2.44.162	10.2.44.162
164	10.2.44.163/32	10.2.44.163 – 10.2.44.163	10.2.44.163
165	10.2.44.164/32	10.2.44.164 – 10.2.44.164	10.2.44.164
166	10.2.44.165/32	10.2.44.165 – 10.2.44.165	10.2.44.165
167	10.2.44.166/32	10.2.44.166 – 10.2.44.166	10.2.44.166
168	10.2.44.167/32	10.2.44.167 – 10.2.44.167	10.2.44.167
169	10.2.44.168/32	10.2.44.168 – 10.2.44.168	10.2.44.168
170	10.2.44.169/32	10.2.44.169 – 10.2.44.169	10.2.44.169
171	10.2.44.170/32	10.2.44.170 – 10.2.44.170	10.2.44.170
172	10.2.44.171/32	10.2.44.171 – 10.2.44.171	10.2.44.171
173	10.2.44.172/32	10.2.44.172 – 10.2.44.172	10.2.44.172
174	10.2.44.173/32	10.2.44.173 – 10.2.44.173	10.2.44.173
175	10.2.44.174/32	10.2.44.174 – 10.2.44.174	10.2.44.174
176	10.2.44.175/32	10.2.44.175 – 10.2.44.175	10.2.44.175
177	10.2.44.176/32	10.2.44.176 – 10.2.44.176	10.2.44.176
178	10.2.44.177/32	10.2.44.177 – 10.2.44.177	10.2.44.177
179	10.2.44.178/32	10.2.44.178 – 10.2.44.178	10.2.44.178
180	10.2.44.179/32	10.2.44.179 – 10.2.44.179	10.2.44.179
181	10.2.44.180/32	10.2.44.180 – 10.2.44.180	10.2.44.180
182	10.2.44.181/32	10.2.44.181 – 10.2.44.181	10.2.44.181
183	10.2.44.182/32	10.2.44.182 – 10.2.44.182	10.2.44.182
184	10.2.44.183/32	10.2.44.183 – 10.2.44.183	10.2.44.183
185	10.2.44.184/32	10.2.44.184 – 10.2.44.184	10.2.44.184
186	10.2.44.185/32	10.2.44.185 – 10.2.44.185	10.2.44.185
187	10.2.44.186/32	10.2.44.186 – 10.2.44.186	10.2.44.186
188	10.2.44.187/32	10.2.44.187 – 10.2.44.187	10.2.44.187
189	10.2.44.188/32	10.2.44.188 – 10.2.44.188	10.2.44.188
190	10.2.44.189/32	10.2.44.189 – 10.2.44.189	10.2.44.189
191	10.2.44.190/32	10.2.44.190 – 10.2.44.190	10.2.44.190
192	10.2.44.191/32	10.2.44.191 – 10.2.44.191	10.2.44.191
193	10.2.44.192/32	10.2.44.192 – 10.2.44.192	10.2.44.192
194	10.2.44.193/32	10.2.44.193 – 10.2.44.193	10.2.44.193
195	10.2.44.194/32	10.2.44.194 – 10.2.44.194	10.2.44.194
196	10.2.44.195/32	10.2.44.195 – 10.2.44.195	10.2.44.195
197	10.2.44.196/32	10.2.44.196 – 10.2.44.196	10.2.44.196
198	10.2.44.197/32	10.2.44.197 – 10.2.44.197	10.2.44.197
199	10.2.44.198/32	10.2.44.198 – 10.2.44.198	10.2.44.198
200	10.2.44.199/32	10.2.44.199 – 10.2.44.199	10.2.44.199
201	10.2.44.200/32	10.2.44.200 – 10.2.44.200	10.2.44.200
202	10.2.44.201/32	10.2.44.201 – 10.2.44.201	10.2.44.201
203	10.2.44.202/32	10.2.44.202 – 10.2.44.202	10.2.44.202
204	10.2.44.203/32	10.2.44.203 – 10.2.44.203	10.2.44.203
205	10.2.44.204/32	10.2.44.204 – 10.2.44.204	10.2.44.204
206	10.2.44.205/32	10.2.44.205 – 10.2.44.205	10.2.44.205
207	10.2.44.206/32	10.2.44.206 – 10.2.44.206	10.2.44.206
208	10.2.44.207/32	10.2.44.207 – 10.2.44.207	10.2.44.207
209	10.2.44.208/32	10.2.44.208 – 10.2.44.208	10.2.44.208
210	10.2.44.209/32	10.2.44.209 – 10.2.44.209	10.2.44.209
211	10.2.44.210/32	10.2.44.210 – 10.2.44.210	10.2.44.210
212	10.2.44.211/32	10.2.44.211 – 10.2.44.211	10.2.44.211
213	10.2.44.212/32	10.2.44.212 – 10.2.44.212	10.2.44.212
214	10.2.44.213/32	10.2.44.213 – 10.2.44.213	10.2.44.213
215	10.2.44.214/32	10.2.44.214 – 10.2.44.214	10.2.44.214
216	10.2.44.215/32	10.2.44.215 – 10.2.44.215	10.2.44.215
217	10.2.44.216/32	10.2.44.216 – 10.2.44.216	10.2.44.216
218	10.2.44.217/32	10.2.44.217 – 10.2.44.217	10.2.44.217
219	10.2.44.218/32	10.2.44.218 – 10.2.44.218	10.2.44.218
220	10.2.44.219/32	10.2.44.219 – 10.2.44.219	10.2.44.219
221	10.2.44.220/32	10.2.44.220 – 10.2.44.220	10.2.44.220
222	10.2.44.221/32	10.2.44.221 – 10.2.44.221	10.2.44.221
223	10.2.44.222/32	10.2.44.222 – 10.2.44.222	10.2.44.222
224	10.2.44.223/32	10.2.44.223 – 10.2.44.223	10.2.44.223
225	10.2.44.224/32	10.2.44.224 – 10.2.44.224	10.2.44.224
226	10.2.44.225/32	10.2.44.225 – 10.2.44.225	10.2.44.225
227	10.2.44.226/32	10.2.44.226 – 10.2.44.226	10.2.44.226
228	10.2.44.227/32	10.2.44.227 – 10.2.44.227	10.2.44.227
229	10.2.44.228/32	10.2.44.228 – 10.2.44.228	10.2.44.228
230	10.2.44.229/32	10.2.44.229 – 10.2.44.229	10.2.44.229
231	10.2.44.230/32	10.2.44.230 – 10.2.44.230	10.2.44.230
232	10.2.44.231/32	10.2.44.231 – 10.2.44.231	10.2.44.231
233	10.2.44.232/32	10.2.44.232 – 10.2.44.232	10.2.44.232
234	10.2.44.233/32	10.2.44.233 – 10.2.44.233	10.2.44.233
235	10.2.44.234/32	10.2.44.234 – 10.2.44.234	10.2.44.234
236	10.2.44.235/32	10.2.44.235 – 10.2.44.235	10.2.44.235
237	10.2.44.236/32	10.2.44.236 – 10.2.44.236	10.2.44.236
238	10.2.44.237/32	10.2.44.237 – 10.2.44.237	10.2.44.237
239	10.2.44.238/32	10.2.44.238 – 10.2.44.238	10.2.44.238
240	10.2.44.239/32	10.2.44.239 – 10.2.44.239	10.2.44.239
241	10.2.44.240/32	10.2.44.240 – 10.2.44.240	10.2.44.240
242	10.2.44.241/32	10.2.44.241 – 10.2.44.241	10.2.44.241
243	10.2.44.242/32	10.2.44.242 – 10.2.44.242	10.2.44.242
244	10.2.44.243/32	10.2.44.243 – 10.2.44.243	10.2.44.243
245	10.2.44.244/32	10.2.44.244 – 10.2.44.244	10.2.44.244
246	10.2.44.245/32	10.2.44.245 – 10.2.44.245	10.2.44.245
247	10.2.44.246/32	10.2.44.246 – 10.2.44.246	10.2.44.246
248	10.2.44.247/32	10.2.44.247 – 10.2.44.247	10.2.44.247
249	10.2.44.248/32	10.2.44.248 – 10.2.44.248	10.2.44.248
250	10.2.44.249/32	10.2.44.249 – 10.2.44.249	10.2.44.249
251	10.2.44.250/32	10.2.44.250 – 10.2.44.250	10.2.44.250
252	10.2.44.251/32	10.2.44.251 – 10.2.44.251	10.2.44.251
253	10.2.44.252/32	10.2.44.252 – 10.2.44.252	10.2.44.252
254	10.2.44.253/32	10.2.44.253 – 10.2.44.253	10.2.44.253
255	10.2.44.254/32	10.2.44.254 – 10.2.44.254	10.2.44.254
256	10.2.44.255/32	10.2.44.255 – 10.2.44.255	10.2.44.255

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 →