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)10.2.74.0/23

network10.2.74.0/23

broadcast10.2.75.255

first host10.2.74.1

last host10.2.75.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.74.0/23

address00001010.00000010.01001010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.01001010.00000000

broadcast00001010.00000010.01001011.11111111

green = network part, grey = host part

hex0x0a024a00

decimal167922176

reverse dns0.74.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:4a00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.74.0/31	10.2.74.0 – 10.2.74.1	10.2.74.1
2	10.2.74.2/31	10.2.74.2 – 10.2.74.3	10.2.74.3
3	10.2.74.4/31	10.2.74.4 – 10.2.74.5	10.2.74.5
4	10.2.74.6/31	10.2.74.6 – 10.2.74.7	10.2.74.7
5	10.2.74.8/31	10.2.74.8 – 10.2.74.9	10.2.74.9
6	10.2.74.10/31	10.2.74.10 – 10.2.74.11	10.2.74.11
7	10.2.74.12/31	10.2.74.12 – 10.2.74.13	10.2.74.13
8	10.2.74.14/31	10.2.74.14 – 10.2.74.15	10.2.74.15
9	10.2.74.16/31	10.2.74.16 – 10.2.74.17	10.2.74.17
10	10.2.74.18/31	10.2.74.18 – 10.2.74.19	10.2.74.19
11	10.2.74.20/31	10.2.74.20 – 10.2.74.21	10.2.74.21
12	10.2.74.22/31	10.2.74.22 – 10.2.74.23	10.2.74.23
13	10.2.74.24/31	10.2.74.24 – 10.2.74.25	10.2.74.25
14	10.2.74.26/31	10.2.74.26 – 10.2.74.27	10.2.74.27
15	10.2.74.28/31	10.2.74.28 – 10.2.74.29	10.2.74.29
16	10.2.74.30/31	10.2.74.30 – 10.2.74.31	10.2.74.31
17	10.2.74.32/31	10.2.74.32 – 10.2.74.33	10.2.74.33
18	10.2.74.34/31	10.2.74.34 – 10.2.74.35	10.2.74.35
19	10.2.74.36/31	10.2.74.36 – 10.2.74.37	10.2.74.37
20	10.2.74.38/31	10.2.74.38 – 10.2.74.39	10.2.74.39
21	10.2.74.40/31	10.2.74.40 – 10.2.74.41	10.2.74.41
22	10.2.74.42/31	10.2.74.42 – 10.2.74.43	10.2.74.43
23	10.2.74.44/31	10.2.74.44 – 10.2.74.45	10.2.74.45
24	10.2.74.46/31	10.2.74.46 – 10.2.74.47	10.2.74.47
25	10.2.74.48/31	10.2.74.48 – 10.2.74.49	10.2.74.49
26	10.2.74.50/31	10.2.74.50 – 10.2.74.51	10.2.74.51
27	10.2.74.52/31	10.2.74.52 – 10.2.74.53	10.2.74.53
28	10.2.74.54/31	10.2.74.54 – 10.2.74.55	10.2.74.55
29	10.2.74.56/31	10.2.74.56 – 10.2.74.57	10.2.74.57
30	10.2.74.58/31	10.2.74.58 – 10.2.74.59	10.2.74.59
31	10.2.74.60/31	10.2.74.60 – 10.2.74.61	10.2.74.61
32	10.2.74.62/31	10.2.74.62 – 10.2.74.63	10.2.74.63
33	10.2.74.64/31	10.2.74.64 – 10.2.74.65	10.2.74.65
34	10.2.74.66/31	10.2.74.66 – 10.2.74.67	10.2.74.67
35	10.2.74.68/31	10.2.74.68 – 10.2.74.69	10.2.74.69
36	10.2.74.70/31	10.2.74.70 – 10.2.74.71	10.2.74.71
37	10.2.74.72/31	10.2.74.72 – 10.2.74.73	10.2.74.73
38	10.2.74.74/31	10.2.74.74 – 10.2.74.75	10.2.74.75
39	10.2.74.76/31	10.2.74.76 – 10.2.74.77	10.2.74.77
40	10.2.74.78/31	10.2.74.78 – 10.2.74.79	10.2.74.79
41	10.2.74.80/31	10.2.74.80 – 10.2.74.81	10.2.74.81
42	10.2.74.82/31	10.2.74.82 – 10.2.74.83	10.2.74.83
43	10.2.74.84/31	10.2.74.84 – 10.2.74.85	10.2.74.85
44	10.2.74.86/31	10.2.74.86 – 10.2.74.87	10.2.74.87
45	10.2.74.88/31	10.2.74.88 – 10.2.74.89	10.2.74.89
46	10.2.74.90/31	10.2.74.90 – 10.2.74.91	10.2.74.91
47	10.2.74.92/31	10.2.74.92 – 10.2.74.93	10.2.74.93
48	10.2.74.94/31	10.2.74.94 – 10.2.74.95	10.2.74.95
49	10.2.74.96/31	10.2.74.96 – 10.2.74.97	10.2.74.97
50	10.2.74.98/31	10.2.74.98 – 10.2.74.99	10.2.74.99
51	10.2.74.100/31	10.2.74.100 – 10.2.74.101	10.2.74.101
52	10.2.74.102/31	10.2.74.102 – 10.2.74.103	10.2.74.103
53	10.2.74.104/31	10.2.74.104 – 10.2.74.105	10.2.74.105
54	10.2.74.106/31	10.2.74.106 – 10.2.74.107	10.2.74.107
55	10.2.74.108/31	10.2.74.108 – 10.2.74.109	10.2.74.109
56	10.2.74.110/31	10.2.74.110 – 10.2.74.111	10.2.74.111
57	10.2.74.112/31	10.2.74.112 – 10.2.74.113	10.2.74.113
58	10.2.74.114/31	10.2.74.114 – 10.2.74.115	10.2.74.115
59	10.2.74.116/31	10.2.74.116 – 10.2.74.117	10.2.74.117
60	10.2.74.118/31	10.2.74.118 – 10.2.74.119	10.2.74.119
61	10.2.74.120/31	10.2.74.120 – 10.2.74.121	10.2.74.121
62	10.2.74.122/31	10.2.74.122 – 10.2.74.123	10.2.74.123
63	10.2.74.124/31	10.2.74.124 – 10.2.74.125	10.2.74.125
64	10.2.74.126/31	10.2.74.126 – 10.2.74.127	10.2.74.127
65	10.2.74.128/31	10.2.74.128 – 10.2.74.129	10.2.74.129
66	10.2.74.130/31	10.2.74.130 – 10.2.74.131	10.2.74.131
67	10.2.74.132/31	10.2.74.132 – 10.2.74.133	10.2.74.133
68	10.2.74.134/31	10.2.74.134 – 10.2.74.135	10.2.74.135
69	10.2.74.136/31	10.2.74.136 – 10.2.74.137	10.2.74.137
70	10.2.74.138/31	10.2.74.138 – 10.2.74.139	10.2.74.139
71	10.2.74.140/31	10.2.74.140 – 10.2.74.141	10.2.74.141
72	10.2.74.142/31	10.2.74.142 – 10.2.74.143	10.2.74.143
73	10.2.74.144/31	10.2.74.144 – 10.2.74.145	10.2.74.145
74	10.2.74.146/31	10.2.74.146 – 10.2.74.147	10.2.74.147
75	10.2.74.148/31	10.2.74.148 – 10.2.74.149	10.2.74.149
76	10.2.74.150/31	10.2.74.150 – 10.2.74.151	10.2.74.151
77	10.2.74.152/31	10.2.74.152 – 10.2.74.153	10.2.74.153
78	10.2.74.154/31	10.2.74.154 – 10.2.74.155	10.2.74.155
79	10.2.74.156/31	10.2.74.156 – 10.2.74.157	10.2.74.157
80	10.2.74.158/31	10.2.74.158 – 10.2.74.159	10.2.74.159
81	10.2.74.160/31	10.2.74.160 – 10.2.74.161	10.2.74.161
82	10.2.74.162/31	10.2.74.162 – 10.2.74.163	10.2.74.163
83	10.2.74.164/31	10.2.74.164 – 10.2.74.165	10.2.74.165
84	10.2.74.166/31	10.2.74.166 – 10.2.74.167	10.2.74.167
85	10.2.74.168/31	10.2.74.168 – 10.2.74.169	10.2.74.169
86	10.2.74.170/31	10.2.74.170 – 10.2.74.171	10.2.74.171
87	10.2.74.172/31	10.2.74.172 – 10.2.74.173	10.2.74.173
88	10.2.74.174/31	10.2.74.174 – 10.2.74.175	10.2.74.175
89	10.2.74.176/31	10.2.74.176 – 10.2.74.177	10.2.74.177
90	10.2.74.178/31	10.2.74.178 – 10.2.74.179	10.2.74.179
91	10.2.74.180/31	10.2.74.180 – 10.2.74.181	10.2.74.181
92	10.2.74.182/31	10.2.74.182 – 10.2.74.183	10.2.74.183
93	10.2.74.184/31	10.2.74.184 – 10.2.74.185	10.2.74.185
94	10.2.74.186/31	10.2.74.186 – 10.2.74.187	10.2.74.187
95	10.2.74.188/31	10.2.74.188 – 10.2.74.189	10.2.74.189
96	10.2.74.190/31	10.2.74.190 – 10.2.74.191	10.2.74.191
97	10.2.74.192/31	10.2.74.192 – 10.2.74.193	10.2.74.193
98	10.2.74.194/31	10.2.74.194 – 10.2.74.195	10.2.74.195
99	10.2.74.196/31	10.2.74.196 – 10.2.74.197	10.2.74.197
100	10.2.74.198/31	10.2.74.198 – 10.2.74.199	10.2.74.199
101	10.2.74.200/31	10.2.74.200 – 10.2.74.201	10.2.74.201
102	10.2.74.202/31	10.2.74.202 – 10.2.74.203	10.2.74.203
103	10.2.74.204/31	10.2.74.204 – 10.2.74.205	10.2.74.205
104	10.2.74.206/31	10.2.74.206 – 10.2.74.207	10.2.74.207
105	10.2.74.208/31	10.2.74.208 – 10.2.74.209	10.2.74.209
106	10.2.74.210/31	10.2.74.210 – 10.2.74.211	10.2.74.211
107	10.2.74.212/31	10.2.74.212 – 10.2.74.213	10.2.74.213
108	10.2.74.214/31	10.2.74.214 – 10.2.74.215	10.2.74.215
109	10.2.74.216/31	10.2.74.216 – 10.2.74.217	10.2.74.217
110	10.2.74.218/31	10.2.74.218 – 10.2.74.219	10.2.74.219
111	10.2.74.220/31	10.2.74.220 – 10.2.74.221	10.2.74.221
112	10.2.74.222/31	10.2.74.222 – 10.2.74.223	10.2.74.223
113	10.2.74.224/31	10.2.74.224 – 10.2.74.225	10.2.74.225
114	10.2.74.226/31	10.2.74.226 – 10.2.74.227	10.2.74.227
115	10.2.74.228/31	10.2.74.228 – 10.2.74.229	10.2.74.229
116	10.2.74.230/31	10.2.74.230 – 10.2.74.231	10.2.74.231
117	10.2.74.232/31	10.2.74.232 – 10.2.74.233	10.2.74.233
118	10.2.74.234/31	10.2.74.234 – 10.2.74.235	10.2.74.235
119	10.2.74.236/31	10.2.74.236 – 10.2.74.237	10.2.74.237
120	10.2.74.238/31	10.2.74.238 – 10.2.74.239	10.2.74.239
121	10.2.74.240/31	10.2.74.240 – 10.2.74.241	10.2.74.241
122	10.2.74.242/31	10.2.74.242 – 10.2.74.243	10.2.74.243
123	10.2.74.244/31	10.2.74.244 – 10.2.74.245	10.2.74.245
124	10.2.74.246/31	10.2.74.246 – 10.2.74.247	10.2.74.247
125	10.2.74.248/31	10.2.74.248 – 10.2.74.249	10.2.74.249
126	10.2.74.250/31	10.2.74.250 – 10.2.74.251	10.2.74.251
127	10.2.74.252/31	10.2.74.252 – 10.2.74.253	10.2.74.253
128	10.2.74.254/31	10.2.74.254 – 10.2.74.255	10.2.74.255
129	10.2.75.0/31	10.2.75.0 – 10.2.75.1	10.2.75.1
130	10.2.75.2/31	10.2.75.2 – 10.2.75.3	10.2.75.3
131	10.2.75.4/31	10.2.75.4 – 10.2.75.5	10.2.75.5
132	10.2.75.6/31	10.2.75.6 – 10.2.75.7	10.2.75.7
133	10.2.75.8/31	10.2.75.8 – 10.2.75.9	10.2.75.9
134	10.2.75.10/31	10.2.75.10 – 10.2.75.11	10.2.75.11
135	10.2.75.12/31	10.2.75.12 – 10.2.75.13	10.2.75.13
136	10.2.75.14/31	10.2.75.14 – 10.2.75.15	10.2.75.15
137	10.2.75.16/31	10.2.75.16 – 10.2.75.17	10.2.75.17
138	10.2.75.18/31	10.2.75.18 – 10.2.75.19	10.2.75.19
139	10.2.75.20/31	10.2.75.20 – 10.2.75.21	10.2.75.21
140	10.2.75.22/31	10.2.75.22 – 10.2.75.23	10.2.75.23
141	10.2.75.24/31	10.2.75.24 – 10.2.75.25	10.2.75.25
142	10.2.75.26/31	10.2.75.26 – 10.2.75.27	10.2.75.27
143	10.2.75.28/31	10.2.75.28 – 10.2.75.29	10.2.75.29
144	10.2.75.30/31	10.2.75.30 – 10.2.75.31	10.2.75.31
145	10.2.75.32/31	10.2.75.32 – 10.2.75.33	10.2.75.33
146	10.2.75.34/31	10.2.75.34 – 10.2.75.35	10.2.75.35
147	10.2.75.36/31	10.2.75.36 – 10.2.75.37	10.2.75.37
148	10.2.75.38/31	10.2.75.38 – 10.2.75.39	10.2.75.39
149	10.2.75.40/31	10.2.75.40 – 10.2.75.41	10.2.75.41
150	10.2.75.42/31	10.2.75.42 – 10.2.75.43	10.2.75.43
151	10.2.75.44/31	10.2.75.44 – 10.2.75.45	10.2.75.45
152	10.2.75.46/31	10.2.75.46 – 10.2.75.47	10.2.75.47
153	10.2.75.48/31	10.2.75.48 – 10.2.75.49	10.2.75.49
154	10.2.75.50/31	10.2.75.50 – 10.2.75.51	10.2.75.51
155	10.2.75.52/31	10.2.75.52 – 10.2.75.53	10.2.75.53
156	10.2.75.54/31	10.2.75.54 – 10.2.75.55	10.2.75.55
157	10.2.75.56/31	10.2.75.56 – 10.2.75.57	10.2.75.57
158	10.2.75.58/31	10.2.75.58 – 10.2.75.59	10.2.75.59
159	10.2.75.60/31	10.2.75.60 – 10.2.75.61	10.2.75.61
160	10.2.75.62/31	10.2.75.62 – 10.2.75.63	10.2.75.63
161	10.2.75.64/31	10.2.75.64 – 10.2.75.65	10.2.75.65
162	10.2.75.66/31	10.2.75.66 – 10.2.75.67	10.2.75.67
163	10.2.75.68/31	10.2.75.68 – 10.2.75.69	10.2.75.69
164	10.2.75.70/31	10.2.75.70 – 10.2.75.71	10.2.75.71
165	10.2.75.72/31	10.2.75.72 – 10.2.75.73	10.2.75.73
166	10.2.75.74/31	10.2.75.74 – 10.2.75.75	10.2.75.75
167	10.2.75.76/31	10.2.75.76 – 10.2.75.77	10.2.75.77
168	10.2.75.78/31	10.2.75.78 – 10.2.75.79	10.2.75.79
169	10.2.75.80/31	10.2.75.80 – 10.2.75.81	10.2.75.81
170	10.2.75.82/31	10.2.75.82 – 10.2.75.83	10.2.75.83
171	10.2.75.84/31	10.2.75.84 – 10.2.75.85	10.2.75.85
172	10.2.75.86/31	10.2.75.86 – 10.2.75.87	10.2.75.87
173	10.2.75.88/31	10.2.75.88 – 10.2.75.89	10.2.75.89
174	10.2.75.90/31	10.2.75.90 – 10.2.75.91	10.2.75.91
175	10.2.75.92/31	10.2.75.92 – 10.2.75.93	10.2.75.93
176	10.2.75.94/31	10.2.75.94 – 10.2.75.95	10.2.75.95
177	10.2.75.96/31	10.2.75.96 – 10.2.75.97	10.2.75.97
178	10.2.75.98/31	10.2.75.98 – 10.2.75.99	10.2.75.99
179	10.2.75.100/31	10.2.75.100 – 10.2.75.101	10.2.75.101
180	10.2.75.102/31	10.2.75.102 – 10.2.75.103	10.2.75.103
181	10.2.75.104/31	10.2.75.104 – 10.2.75.105	10.2.75.105
182	10.2.75.106/31	10.2.75.106 – 10.2.75.107	10.2.75.107
183	10.2.75.108/31	10.2.75.108 – 10.2.75.109	10.2.75.109
184	10.2.75.110/31	10.2.75.110 – 10.2.75.111	10.2.75.111
185	10.2.75.112/31	10.2.75.112 – 10.2.75.113	10.2.75.113
186	10.2.75.114/31	10.2.75.114 – 10.2.75.115	10.2.75.115
187	10.2.75.116/31	10.2.75.116 – 10.2.75.117	10.2.75.117
188	10.2.75.118/31	10.2.75.118 – 10.2.75.119	10.2.75.119
189	10.2.75.120/31	10.2.75.120 – 10.2.75.121	10.2.75.121
190	10.2.75.122/31	10.2.75.122 – 10.2.75.123	10.2.75.123
191	10.2.75.124/31	10.2.75.124 – 10.2.75.125	10.2.75.125
192	10.2.75.126/31	10.2.75.126 – 10.2.75.127	10.2.75.127
193	10.2.75.128/31	10.2.75.128 – 10.2.75.129	10.2.75.129
194	10.2.75.130/31	10.2.75.130 – 10.2.75.131	10.2.75.131
195	10.2.75.132/31	10.2.75.132 – 10.2.75.133	10.2.75.133
196	10.2.75.134/31	10.2.75.134 – 10.2.75.135	10.2.75.135
197	10.2.75.136/31	10.2.75.136 – 10.2.75.137	10.2.75.137
198	10.2.75.138/31	10.2.75.138 – 10.2.75.139	10.2.75.139
199	10.2.75.140/31	10.2.75.140 – 10.2.75.141	10.2.75.141
200	10.2.75.142/31	10.2.75.142 – 10.2.75.143	10.2.75.143
201	10.2.75.144/31	10.2.75.144 – 10.2.75.145	10.2.75.145
202	10.2.75.146/31	10.2.75.146 – 10.2.75.147	10.2.75.147
203	10.2.75.148/31	10.2.75.148 – 10.2.75.149	10.2.75.149
204	10.2.75.150/31	10.2.75.150 – 10.2.75.151	10.2.75.151
205	10.2.75.152/31	10.2.75.152 – 10.2.75.153	10.2.75.153
206	10.2.75.154/31	10.2.75.154 – 10.2.75.155	10.2.75.155
207	10.2.75.156/31	10.2.75.156 – 10.2.75.157	10.2.75.157
208	10.2.75.158/31	10.2.75.158 – 10.2.75.159	10.2.75.159
209	10.2.75.160/31	10.2.75.160 – 10.2.75.161	10.2.75.161
210	10.2.75.162/31	10.2.75.162 – 10.2.75.163	10.2.75.163
211	10.2.75.164/31	10.2.75.164 – 10.2.75.165	10.2.75.165
212	10.2.75.166/31	10.2.75.166 – 10.2.75.167	10.2.75.167
213	10.2.75.168/31	10.2.75.168 – 10.2.75.169	10.2.75.169
214	10.2.75.170/31	10.2.75.170 – 10.2.75.171	10.2.75.171
215	10.2.75.172/31	10.2.75.172 – 10.2.75.173	10.2.75.173
216	10.2.75.174/31	10.2.75.174 – 10.2.75.175	10.2.75.175
217	10.2.75.176/31	10.2.75.176 – 10.2.75.177	10.2.75.177
218	10.2.75.178/31	10.2.75.178 – 10.2.75.179	10.2.75.179
219	10.2.75.180/31	10.2.75.180 – 10.2.75.181	10.2.75.181
220	10.2.75.182/31	10.2.75.182 – 10.2.75.183	10.2.75.183
221	10.2.75.184/31	10.2.75.184 – 10.2.75.185	10.2.75.185
222	10.2.75.186/31	10.2.75.186 – 10.2.75.187	10.2.75.187
223	10.2.75.188/31	10.2.75.188 – 10.2.75.189	10.2.75.189
224	10.2.75.190/31	10.2.75.190 – 10.2.75.191	10.2.75.191
225	10.2.75.192/31	10.2.75.192 – 10.2.75.193	10.2.75.193
226	10.2.75.194/31	10.2.75.194 – 10.2.75.195	10.2.75.195
227	10.2.75.196/31	10.2.75.196 – 10.2.75.197	10.2.75.197
228	10.2.75.198/31	10.2.75.198 – 10.2.75.199	10.2.75.199
229	10.2.75.200/31	10.2.75.200 – 10.2.75.201	10.2.75.201
230	10.2.75.202/31	10.2.75.202 – 10.2.75.203	10.2.75.203
231	10.2.75.204/31	10.2.75.204 – 10.2.75.205	10.2.75.205
232	10.2.75.206/31	10.2.75.206 – 10.2.75.207	10.2.75.207
233	10.2.75.208/31	10.2.75.208 – 10.2.75.209	10.2.75.209
234	10.2.75.210/31	10.2.75.210 – 10.2.75.211	10.2.75.211
235	10.2.75.212/31	10.2.75.212 – 10.2.75.213	10.2.75.213
236	10.2.75.214/31	10.2.75.214 – 10.2.75.215	10.2.75.215
237	10.2.75.216/31	10.2.75.216 – 10.2.75.217	10.2.75.217
238	10.2.75.218/31	10.2.75.218 – 10.2.75.219	10.2.75.219
239	10.2.75.220/31	10.2.75.220 – 10.2.75.221	10.2.75.221
240	10.2.75.222/31	10.2.75.222 – 10.2.75.223	10.2.75.223
241	10.2.75.224/31	10.2.75.224 – 10.2.75.225	10.2.75.225
242	10.2.75.226/31	10.2.75.226 – 10.2.75.227	10.2.75.227
243	10.2.75.228/31	10.2.75.228 – 10.2.75.229	10.2.75.229
244	10.2.75.230/31	10.2.75.230 – 10.2.75.231	10.2.75.231
245	10.2.75.232/31	10.2.75.232 – 10.2.75.233	10.2.75.233
246	10.2.75.234/31	10.2.75.234 – 10.2.75.235	10.2.75.235
247	10.2.75.236/31	10.2.75.236 – 10.2.75.237	10.2.75.237
248	10.2.75.238/31	10.2.75.238 – 10.2.75.239	10.2.75.239
249	10.2.75.240/31	10.2.75.240 – 10.2.75.241	10.2.75.241
250	10.2.75.242/31	10.2.75.242 – 10.2.75.243	10.2.75.243
251	10.2.75.244/31	10.2.75.244 – 10.2.75.245	10.2.75.245
252	10.2.75.246/31	10.2.75.246 – 10.2.75.247	10.2.75.247
253	10.2.75.248/31	10.2.75.248 – 10.2.75.249	10.2.75.249
254	10.2.75.250/31	10.2.75.250 – 10.2.75.251	10.2.75.251
255	10.2.75.252/31	10.2.75.252 – 10.2.75.253	10.2.75.253
256	10.2.75.254/31	10.2.75.254 – 10.2.75.255	10.2.75.255

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 →