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)10.45.44.0/23

network10.45.44.0/23

broadcast10.45.45.255

first host10.45.44.1

last host10.45.45.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.45.44.0/23

address00001010.00101101.00101100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00101101.00101100.00000000

broadcast00001010.00101101.00101101.11111111

green = network part, grey = host part

hex0x0a2d2c00

decimal170732544

reverse dns0.44.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:2c00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.45.44.0/31	10.45.44.0 – 10.45.44.1	10.45.44.1
2	10.45.44.2/31	10.45.44.2 – 10.45.44.3	10.45.44.3
3	10.45.44.4/31	10.45.44.4 – 10.45.44.5	10.45.44.5
4	10.45.44.6/31	10.45.44.6 – 10.45.44.7	10.45.44.7
5	10.45.44.8/31	10.45.44.8 – 10.45.44.9	10.45.44.9
6	10.45.44.10/31	10.45.44.10 – 10.45.44.11	10.45.44.11
7	10.45.44.12/31	10.45.44.12 – 10.45.44.13	10.45.44.13
8	10.45.44.14/31	10.45.44.14 – 10.45.44.15	10.45.44.15
9	10.45.44.16/31	10.45.44.16 – 10.45.44.17	10.45.44.17
10	10.45.44.18/31	10.45.44.18 – 10.45.44.19	10.45.44.19
11	10.45.44.20/31	10.45.44.20 – 10.45.44.21	10.45.44.21
12	10.45.44.22/31	10.45.44.22 – 10.45.44.23	10.45.44.23
13	10.45.44.24/31	10.45.44.24 – 10.45.44.25	10.45.44.25
14	10.45.44.26/31	10.45.44.26 – 10.45.44.27	10.45.44.27
15	10.45.44.28/31	10.45.44.28 – 10.45.44.29	10.45.44.29
16	10.45.44.30/31	10.45.44.30 – 10.45.44.31	10.45.44.31
17	10.45.44.32/31	10.45.44.32 – 10.45.44.33	10.45.44.33
18	10.45.44.34/31	10.45.44.34 – 10.45.44.35	10.45.44.35
19	10.45.44.36/31	10.45.44.36 – 10.45.44.37	10.45.44.37
20	10.45.44.38/31	10.45.44.38 – 10.45.44.39	10.45.44.39
21	10.45.44.40/31	10.45.44.40 – 10.45.44.41	10.45.44.41
22	10.45.44.42/31	10.45.44.42 – 10.45.44.43	10.45.44.43
23	10.45.44.44/31	10.45.44.44 – 10.45.44.45	10.45.44.45
24	10.45.44.46/31	10.45.44.46 – 10.45.44.47	10.45.44.47
25	10.45.44.48/31	10.45.44.48 – 10.45.44.49	10.45.44.49
26	10.45.44.50/31	10.45.44.50 – 10.45.44.51	10.45.44.51
27	10.45.44.52/31	10.45.44.52 – 10.45.44.53	10.45.44.53
28	10.45.44.54/31	10.45.44.54 – 10.45.44.55	10.45.44.55
29	10.45.44.56/31	10.45.44.56 – 10.45.44.57	10.45.44.57
30	10.45.44.58/31	10.45.44.58 – 10.45.44.59	10.45.44.59
31	10.45.44.60/31	10.45.44.60 – 10.45.44.61	10.45.44.61
32	10.45.44.62/31	10.45.44.62 – 10.45.44.63	10.45.44.63
33	10.45.44.64/31	10.45.44.64 – 10.45.44.65	10.45.44.65
34	10.45.44.66/31	10.45.44.66 – 10.45.44.67	10.45.44.67
35	10.45.44.68/31	10.45.44.68 – 10.45.44.69	10.45.44.69
36	10.45.44.70/31	10.45.44.70 – 10.45.44.71	10.45.44.71
37	10.45.44.72/31	10.45.44.72 – 10.45.44.73	10.45.44.73
38	10.45.44.74/31	10.45.44.74 – 10.45.44.75	10.45.44.75
39	10.45.44.76/31	10.45.44.76 – 10.45.44.77	10.45.44.77
40	10.45.44.78/31	10.45.44.78 – 10.45.44.79	10.45.44.79
41	10.45.44.80/31	10.45.44.80 – 10.45.44.81	10.45.44.81
42	10.45.44.82/31	10.45.44.82 – 10.45.44.83	10.45.44.83
43	10.45.44.84/31	10.45.44.84 – 10.45.44.85	10.45.44.85
44	10.45.44.86/31	10.45.44.86 – 10.45.44.87	10.45.44.87
45	10.45.44.88/31	10.45.44.88 – 10.45.44.89	10.45.44.89
46	10.45.44.90/31	10.45.44.90 – 10.45.44.91	10.45.44.91
47	10.45.44.92/31	10.45.44.92 – 10.45.44.93	10.45.44.93
48	10.45.44.94/31	10.45.44.94 – 10.45.44.95	10.45.44.95
49	10.45.44.96/31	10.45.44.96 – 10.45.44.97	10.45.44.97
50	10.45.44.98/31	10.45.44.98 – 10.45.44.99	10.45.44.99
51	10.45.44.100/31	10.45.44.100 – 10.45.44.101	10.45.44.101
52	10.45.44.102/31	10.45.44.102 – 10.45.44.103	10.45.44.103
53	10.45.44.104/31	10.45.44.104 – 10.45.44.105	10.45.44.105
54	10.45.44.106/31	10.45.44.106 – 10.45.44.107	10.45.44.107
55	10.45.44.108/31	10.45.44.108 – 10.45.44.109	10.45.44.109
56	10.45.44.110/31	10.45.44.110 – 10.45.44.111	10.45.44.111
57	10.45.44.112/31	10.45.44.112 – 10.45.44.113	10.45.44.113
58	10.45.44.114/31	10.45.44.114 – 10.45.44.115	10.45.44.115
59	10.45.44.116/31	10.45.44.116 – 10.45.44.117	10.45.44.117
60	10.45.44.118/31	10.45.44.118 – 10.45.44.119	10.45.44.119
61	10.45.44.120/31	10.45.44.120 – 10.45.44.121	10.45.44.121
62	10.45.44.122/31	10.45.44.122 – 10.45.44.123	10.45.44.123
63	10.45.44.124/31	10.45.44.124 – 10.45.44.125	10.45.44.125
64	10.45.44.126/31	10.45.44.126 – 10.45.44.127	10.45.44.127
65	10.45.44.128/31	10.45.44.128 – 10.45.44.129	10.45.44.129
66	10.45.44.130/31	10.45.44.130 – 10.45.44.131	10.45.44.131
67	10.45.44.132/31	10.45.44.132 – 10.45.44.133	10.45.44.133
68	10.45.44.134/31	10.45.44.134 – 10.45.44.135	10.45.44.135
69	10.45.44.136/31	10.45.44.136 – 10.45.44.137	10.45.44.137
70	10.45.44.138/31	10.45.44.138 – 10.45.44.139	10.45.44.139
71	10.45.44.140/31	10.45.44.140 – 10.45.44.141	10.45.44.141
72	10.45.44.142/31	10.45.44.142 – 10.45.44.143	10.45.44.143
73	10.45.44.144/31	10.45.44.144 – 10.45.44.145	10.45.44.145
74	10.45.44.146/31	10.45.44.146 – 10.45.44.147	10.45.44.147
75	10.45.44.148/31	10.45.44.148 – 10.45.44.149	10.45.44.149
76	10.45.44.150/31	10.45.44.150 – 10.45.44.151	10.45.44.151
77	10.45.44.152/31	10.45.44.152 – 10.45.44.153	10.45.44.153
78	10.45.44.154/31	10.45.44.154 – 10.45.44.155	10.45.44.155
79	10.45.44.156/31	10.45.44.156 – 10.45.44.157	10.45.44.157
80	10.45.44.158/31	10.45.44.158 – 10.45.44.159	10.45.44.159
81	10.45.44.160/31	10.45.44.160 – 10.45.44.161	10.45.44.161
82	10.45.44.162/31	10.45.44.162 – 10.45.44.163	10.45.44.163
83	10.45.44.164/31	10.45.44.164 – 10.45.44.165	10.45.44.165
84	10.45.44.166/31	10.45.44.166 – 10.45.44.167	10.45.44.167
85	10.45.44.168/31	10.45.44.168 – 10.45.44.169	10.45.44.169
86	10.45.44.170/31	10.45.44.170 – 10.45.44.171	10.45.44.171
87	10.45.44.172/31	10.45.44.172 – 10.45.44.173	10.45.44.173
88	10.45.44.174/31	10.45.44.174 – 10.45.44.175	10.45.44.175
89	10.45.44.176/31	10.45.44.176 – 10.45.44.177	10.45.44.177
90	10.45.44.178/31	10.45.44.178 – 10.45.44.179	10.45.44.179
91	10.45.44.180/31	10.45.44.180 – 10.45.44.181	10.45.44.181
92	10.45.44.182/31	10.45.44.182 – 10.45.44.183	10.45.44.183
93	10.45.44.184/31	10.45.44.184 – 10.45.44.185	10.45.44.185
94	10.45.44.186/31	10.45.44.186 – 10.45.44.187	10.45.44.187
95	10.45.44.188/31	10.45.44.188 – 10.45.44.189	10.45.44.189
96	10.45.44.190/31	10.45.44.190 – 10.45.44.191	10.45.44.191
97	10.45.44.192/31	10.45.44.192 – 10.45.44.193	10.45.44.193
98	10.45.44.194/31	10.45.44.194 – 10.45.44.195	10.45.44.195
99	10.45.44.196/31	10.45.44.196 – 10.45.44.197	10.45.44.197
100	10.45.44.198/31	10.45.44.198 – 10.45.44.199	10.45.44.199
101	10.45.44.200/31	10.45.44.200 – 10.45.44.201	10.45.44.201
102	10.45.44.202/31	10.45.44.202 – 10.45.44.203	10.45.44.203
103	10.45.44.204/31	10.45.44.204 – 10.45.44.205	10.45.44.205
104	10.45.44.206/31	10.45.44.206 – 10.45.44.207	10.45.44.207
105	10.45.44.208/31	10.45.44.208 – 10.45.44.209	10.45.44.209
106	10.45.44.210/31	10.45.44.210 – 10.45.44.211	10.45.44.211
107	10.45.44.212/31	10.45.44.212 – 10.45.44.213	10.45.44.213
108	10.45.44.214/31	10.45.44.214 – 10.45.44.215	10.45.44.215
109	10.45.44.216/31	10.45.44.216 – 10.45.44.217	10.45.44.217
110	10.45.44.218/31	10.45.44.218 – 10.45.44.219	10.45.44.219
111	10.45.44.220/31	10.45.44.220 – 10.45.44.221	10.45.44.221
112	10.45.44.222/31	10.45.44.222 – 10.45.44.223	10.45.44.223
113	10.45.44.224/31	10.45.44.224 – 10.45.44.225	10.45.44.225
114	10.45.44.226/31	10.45.44.226 – 10.45.44.227	10.45.44.227
115	10.45.44.228/31	10.45.44.228 – 10.45.44.229	10.45.44.229
116	10.45.44.230/31	10.45.44.230 – 10.45.44.231	10.45.44.231
117	10.45.44.232/31	10.45.44.232 – 10.45.44.233	10.45.44.233
118	10.45.44.234/31	10.45.44.234 – 10.45.44.235	10.45.44.235
119	10.45.44.236/31	10.45.44.236 – 10.45.44.237	10.45.44.237
120	10.45.44.238/31	10.45.44.238 – 10.45.44.239	10.45.44.239
121	10.45.44.240/31	10.45.44.240 – 10.45.44.241	10.45.44.241
122	10.45.44.242/31	10.45.44.242 – 10.45.44.243	10.45.44.243
123	10.45.44.244/31	10.45.44.244 – 10.45.44.245	10.45.44.245
124	10.45.44.246/31	10.45.44.246 – 10.45.44.247	10.45.44.247
125	10.45.44.248/31	10.45.44.248 – 10.45.44.249	10.45.44.249
126	10.45.44.250/31	10.45.44.250 – 10.45.44.251	10.45.44.251
127	10.45.44.252/31	10.45.44.252 – 10.45.44.253	10.45.44.253
128	10.45.44.254/31	10.45.44.254 – 10.45.44.255	10.45.44.255
129	10.45.45.0/31	10.45.45.0 – 10.45.45.1	10.45.45.1
130	10.45.45.2/31	10.45.45.2 – 10.45.45.3	10.45.45.3
131	10.45.45.4/31	10.45.45.4 – 10.45.45.5	10.45.45.5
132	10.45.45.6/31	10.45.45.6 – 10.45.45.7	10.45.45.7
133	10.45.45.8/31	10.45.45.8 – 10.45.45.9	10.45.45.9
134	10.45.45.10/31	10.45.45.10 – 10.45.45.11	10.45.45.11
135	10.45.45.12/31	10.45.45.12 – 10.45.45.13	10.45.45.13
136	10.45.45.14/31	10.45.45.14 – 10.45.45.15	10.45.45.15
137	10.45.45.16/31	10.45.45.16 – 10.45.45.17	10.45.45.17
138	10.45.45.18/31	10.45.45.18 – 10.45.45.19	10.45.45.19
139	10.45.45.20/31	10.45.45.20 – 10.45.45.21	10.45.45.21
140	10.45.45.22/31	10.45.45.22 – 10.45.45.23	10.45.45.23
141	10.45.45.24/31	10.45.45.24 – 10.45.45.25	10.45.45.25
142	10.45.45.26/31	10.45.45.26 – 10.45.45.27	10.45.45.27
143	10.45.45.28/31	10.45.45.28 – 10.45.45.29	10.45.45.29
144	10.45.45.30/31	10.45.45.30 – 10.45.45.31	10.45.45.31
145	10.45.45.32/31	10.45.45.32 – 10.45.45.33	10.45.45.33
146	10.45.45.34/31	10.45.45.34 – 10.45.45.35	10.45.45.35
147	10.45.45.36/31	10.45.45.36 – 10.45.45.37	10.45.45.37
148	10.45.45.38/31	10.45.45.38 – 10.45.45.39	10.45.45.39
149	10.45.45.40/31	10.45.45.40 – 10.45.45.41	10.45.45.41
150	10.45.45.42/31	10.45.45.42 – 10.45.45.43	10.45.45.43
151	10.45.45.44/31	10.45.45.44 – 10.45.45.45	10.45.45.45
152	10.45.45.46/31	10.45.45.46 – 10.45.45.47	10.45.45.47
153	10.45.45.48/31	10.45.45.48 – 10.45.45.49	10.45.45.49
154	10.45.45.50/31	10.45.45.50 – 10.45.45.51	10.45.45.51
155	10.45.45.52/31	10.45.45.52 – 10.45.45.53	10.45.45.53
156	10.45.45.54/31	10.45.45.54 – 10.45.45.55	10.45.45.55
157	10.45.45.56/31	10.45.45.56 – 10.45.45.57	10.45.45.57
158	10.45.45.58/31	10.45.45.58 – 10.45.45.59	10.45.45.59
159	10.45.45.60/31	10.45.45.60 – 10.45.45.61	10.45.45.61
160	10.45.45.62/31	10.45.45.62 – 10.45.45.63	10.45.45.63
161	10.45.45.64/31	10.45.45.64 – 10.45.45.65	10.45.45.65
162	10.45.45.66/31	10.45.45.66 – 10.45.45.67	10.45.45.67
163	10.45.45.68/31	10.45.45.68 – 10.45.45.69	10.45.45.69
164	10.45.45.70/31	10.45.45.70 – 10.45.45.71	10.45.45.71
165	10.45.45.72/31	10.45.45.72 – 10.45.45.73	10.45.45.73
166	10.45.45.74/31	10.45.45.74 – 10.45.45.75	10.45.45.75
167	10.45.45.76/31	10.45.45.76 – 10.45.45.77	10.45.45.77
168	10.45.45.78/31	10.45.45.78 – 10.45.45.79	10.45.45.79
169	10.45.45.80/31	10.45.45.80 – 10.45.45.81	10.45.45.81
170	10.45.45.82/31	10.45.45.82 – 10.45.45.83	10.45.45.83
171	10.45.45.84/31	10.45.45.84 – 10.45.45.85	10.45.45.85
172	10.45.45.86/31	10.45.45.86 – 10.45.45.87	10.45.45.87
173	10.45.45.88/31	10.45.45.88 – 10.45.45.89	10.45.45.89
174	10.45.45.90/31	10.45.45.90 – 10.45.45.91	10.45.45.91
175	10.45.45.92/31	10.45.45.92 – 10.45.45.93	10.45.45.93
176	10.45.45.94/31	10.45.45.94 – 10.45.45.95	10.45.45.95
177	10.45.45.96/31	10.45.45.96 – 10.45.45.97	10.45.45.97
178	10.45.45.98/31	10.45.45.98 – 10.45.45.99	10.45.45.99
179	10.45.45.100/31	10.45.45.100 – 10.45.45.101	10.45.45.101
180	10.45.45.102/31	10.45.45.102 – 10.45.45.103	10.45.45.103
181	10.45.45.104/31	10.45.45.104 – 10.45.45.105	10.45.45.105
182	10.45.45.106/31	10.45.45.106 – 10.45.45.107	10.45.45.107
183	10.45.45.108/31	10.45.45.108 – 10.45.45.109	10.45.45.109
184	10.45.45.110/31	10.45.45.110 – 10.45.45.111	10.45.45.111
185	10.45.45.112/31	10.45.45.112 – 10.45.45.113	10.45.45.113
186	10.45.45.114/31	10.45.45.114 – 10.45.45.115	10.45.45.115
187	10.45.45.116/31	10.45.45.116 – 10.45.45.117	10.45.45.117
188	10.45.45.118/31	10.45.45.118 – 10.45.45.119	10.45.45.119
189	10.45.45.120/31	10.45.45.120 – 10.45.45.121	10.45.45.121
190	10.45.45.122/31	10.45.45.122 – 10.45.45.123	10.45.45.123
191	10.45.45.124/31	10.45.45.124 – 10.45.45.125	10.45.45.125
192	10.45.45.126/31	10.45.45.126 – 10.45.45.127	10.45.45.127
193	10.45.45.128/31	10.45.45.128 – 10.45.45.129	10.45.45.129
194	10.45.45.130/31	10.45.45.130 – 10.45.45.131	10.45.45.131
195	10.45.45.132/31	10.45.45.132 – 10.45.45.133	10.45.45.133
196	10.45.45.134/31	10.45.45.134 – 10.45.45.135	10.45.45.135
197	10.45.45.136/31	10.45.45.136 – 10.45.45.137	10.45.45.137
198	10.45.45.138/31	10.45.45.138 – 10.45.45.139	10.45.45.139
199	10.45.45.140/31	10.45.45.140 – 10.45.45.141	10.45.45.141
200	10.45.45.142/31	10.45.45.142 – 10.45.45.143	10.45.45.143
201	10.45.45.144/31	10.45.45.144 – 10.45.45.145	10.45.45.145
202	10.45.45.146/31	10.45.45.146 – 10.45.45.147	10.45.45.147
203	10.45.45.148/31	10.45.45.148 – 10.45.45.149	10.45.45.149
204	10.45.45.150/31	10.45.45.150 – 10.45.45.151	10.45.45.151
205	10.45.45.152/31	10.45.45.152 – 10.45.45.153	10.45.45.153
206	10.45.45.154/31	10.45.45.154 – 10.45.45.155	10.45.45.155
207	10.45.45.156/31	10.45.45.156 – 10.45.45.157	10.45.45.157
208	10.45.45.158/31	10.45.45.158 – 10.45.45.159	10.45.45.159
209	10.45.45.160/31	10.45.45.160 – 10.45.45.161	10.45.45.161
210	10.45.45.162/31	10.45.45.162 – 10.45.45.163	10.45.45.163
211	10.45.45.164/31	10.45.45.164 – 10.45.45.165	10.45.45.165
212	10.45.45.166/31	10.45.45.166 – 10.45.45.167	10.45.45.167
213	10.45.45.168/31	10.45.45.168 – 10.45.45.169	10.45.45.169
214	10.45.45.170/31	10.45.45.170 – 10.45.45.171	10.45.45.171
215	10.45.45.172/31	10.45.45.172 – 10.45.45.173	10.45.45.173
216	10.45.45.174/31	10.45.45.174 – 10.45.45.175	10.45.45.175
217	10.45.45.176/31	10.45.45.176 – 10.45.45.177	10.45.45.177
218	10.45.45.178/31	10.45.45.178 – 10.45.45.179	10.45.45.179
219	10.45.45.180/31	10.45.45.180 – 10.45.45.181	10.45.45.181
220	10.45.45.182/31	10.45.45.182 – 10.45.45.183	10.45.45.183
221	10.45.45.184/31	10.45.45.184 – 10.45.45.185	10.45.45.185
222	10.45.45.186/31	10.45.45.186 – 10.45.45.187	10.45.45.187
223	10.45.45.188/31	10.45.45.188 – 10.45.45.189	10.45.45.189
224	10.45.45.190/31	10.45.45.190 – 10.45.45.191	10.45.45.191
225	10.45.45.192/31	10.45.45.192 – 10.45.45.193	10.45.45.193
226	10.45.45.194/31	10.45.45.194 – 10.45.45.195	10.45.45.195
227	10.45.45.196/31	10.45.45.196 – 10.45.45.197	10.45.45.197
228	10.45.45.198/31	10.45.45.198 – 10.45.45.199	10.45.45.199
229	10.45.45.200/31	10.45.45.200 – 10.45.45.201	10.45.45.201
230	10.45.45.202/31	10.45.45.202 – 10.45.45.203	10.45.45.203
231	10.45.45.204/31	10.45.45.204 – 10.45.45.205	10.45.45.205
232	10.45.45.206/31	10.45.45.206 – 10.45.45.207	10.45.45.207
233	10.45.45.208/31	10.45.45.208 – 10.45.45.209	10.45.45.209
234	10.45.45.210/31	10.45.45.210 – 10.45.45.211	10.45.45.211
235	10.45.45.212/31	10.45.45.212 – 10.45.45.213	10.45.45.213
236	10.45.45.214/31	10.45.45.214 – 10.45.45.215	10.45.45.215
237	10.45.45.216/31	10.45.45.216 – 10.45.45.217	10.45.45.217
238	10.45.45.218/31	10.45.45.218 – 10.45.45.219	10.45.45.219
239	10.45.45.220/31	10.45.45.220 – 10.45.45.221	10.45.45.221
240	10.45.45.222/31	10.45.45.222 – 10.45.45.223	10.45.45.223
241	10.45.45.224/31	10.45.45.224 – 10.45.45.225	10.45.45.225
242	10.45.45.226/31	10.45.45.226 – 10.45.45.227	10.45.45.227
243	10.45.45.228/31	10.45.45.228 – 10.45.45.229	10.45.45.229
244	10.45.45.230/31	10.45.45.230 – 10.45.45.231	10.45.45.231
245	10.45.45.232/31	10.45.45.232 – 10.45.45.233	10.45.45.233
246	10.45.45.234/31	10.45.45.234 – 10.45.45.235	10.45.45.235
247	10.45.45.236/31	10.45.45.236 – 10.45.45.237	10.45.45.237
248	10.45.45.238/31	10.45.45.238 – 10.45.45.239	10.45.45.239
249	10.45.45.240/31	10.45.45.240 – 10.45.45.241	10.45.45.241
250	10.45.45.242/31	10.45.45.242 – 10.45.45.243	10.45.45.243
251	10.45.45.244/31	10.45.45.244 – 10.45.45.245	10.45.45.245
252	10.45.45.246/31	10.45.45.246 – 10.45.45.247	10.45.45.247
253	10.45.45.248/31	10.45.45.248 – 10.45.45.249	10.45.45.249
254	10.45.45.250/31	10.45.45.250 – 10.45.45.251	10.45.45.251
255	10.45.45.252/31	10.45.45.252 – 10.45.45.253	10.45.45.253
256	10.45.45.254/31	10.45.45.254 – 10.45.45.255	10.45.45.255

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 /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 →