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)10.28.224.0/19

network10.28.224.0/19

broadcast10.28.255.255

first host10.28.224.1

last host10.28.255.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.28.224.0/19

address00001010.00011100.11100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011100.11100000.00000000

broadcast00001010.00011100.11111111.11111111

green = network part, grey = host part

hex0x0a1ce000

decimal169664512

reverse dns0.224.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:e000

/19 split into /30 · 2,048 subnets

close ×

#	network	host range	broadcast
1	10.28.224.0/30	10.28.224.1 – 10.28.224.2	10.28.224.3
2	10.28.224.4/30	10.28.224.5 – 10.28.224.6	10.28.224.7
3	10.28.224.8/30	10.28.224.9 – 10.28.224.10	10.28.224.11
4	10.28.224.12/30	10.28.224.13 – 10.28.224.14	10.28.224.15
5	10.28.224.16/30	10.28.224.17 – 10.28.224.18	10.28.224.19
6	10.28.224.20/30	10.28.224.21 – 10.28.224.22	10.28.224.23
7	10.28.224.24/30	10.28.224.25 – 10.28.224.26	10.28.224.27
8	10.28.224.28/30	10.28.224.29 – 10.28.224.30	10.28.224.31
9	10.28.224.32/30	10.28.224.33 – 10.28.224.34	10.28.224.35
10	10.28.224.36/30	10.28.224.37 – 10.28.224.38	10.28.224.39
11	10.28.224.40/30	10.28.224.41 – 10.28.224.42	10.28.224.43
12	10.28.224.44/30	10.28.224.45 – 10.28.224.46	10.28.224.47
13	10.28.224.48/30	10.28.224.49 – 10.28.224.50	10.28.224.51
14	10.28.224.52/30	10.28.224.53 – 10.28.224.54	10.28.224.55
15	10.28.224.56/30	10.28.224.57 – 10.28.224.58	10.28.224.59
16	10.28.224.60/30	10.28.224.61 – 10.28.224.62	10.28.224.63
17	10.28.224.64/30	10.28.224.65 – 10.28.224.66	10.28.224.67
18	10.28.224.68/30	10.28.224.69 – 10.28.224.70	10.28.224.71
19	10.28.224.72/30	10.28.224.73 – 10.28.224.74	10.28.224.75
20	10.28.224.76/30	10.28.224.77 – 10.28.224.78	10.28.224.79
21	10.28.224.80/30	10.28.224.81 – 10.28.224.82	10.28.224.83
22	10.28.224.84/30	10.28.224.85 – 10.28.224.86	10.28.224.87
23	10.28.224.88/30	10.28.224.89 – 10.28.224.90	10.28.224.91
24	10.28.224.92/30	10.28.224.93 – 10.28.224.94	10.28.224.95
25	10.28.224.96/30	10.28.224.97 – 10.28.224.98	10.28.224.99
26	10.28.224.100/30	10.28.224.101 – 10.28.224.102	10.28.224.103
27	10.28.224.104/30	10.28.224.105 – 10.28.224.106	10.28.224.107
28	10.28.224.108/30	10.28.224.109 – 10.28.224.110	10.28.224.111
29	10.28.224.112/30	10.28.224.113 – 10.28.224.114	10.28.224.115
30	10.28.224.116/30	10.28.224.117 – 10.28.224.118	10.28.224.119
31	10.28.224.120/30	10.28.224.121 – 10.28.224.122	10.28.224.123
32	10.28.224.124/30	10.28.224.125 – 10.28.224.126	10.28.224.127
33	10.28.224.128/30	10.28.224.129 – 10.28.224.130	10.28.224.131
34	10.28.224.132/30	10.28.224.133 – 10.28.224.134	10.28.224.135
35	10.28.224.136/30	10.28.224.137 – 10.28.224.138	10.28.224.139
36	10.28.224.140/30	10.28.224.141 – 10.28.224.142	10.28.224.143
37	10.28.224.144/30	10.28.224.145 – 10.28.224.146	10.28.224.147
38	10.28.224.148/30	10.28.224.149 – 10.28.224.150	10.28.224.151
39	10.28.224.152/30	10.28.224.153 – 10.28.224.154	10.28.224.155
40	10.28.224.156/30	10.28.224.157 – 10.28.224.158	10.28.224.159
41	10.28.224.160/30	10.28.224.161 – 10.28.224.162	10.28.224.163
42	10.28.224.164/30	10.28.224.165 – 10.28.224.166	10.28.224.167
43	10.28.224.168/30	10.28.224.169 – 10.28.224.170	10.28.224.171
44	10.28.224.172/30	10.28.224.173 – 10.28.224.174	10.28.224.175
45	10.28.224.176/30	10.28.224.177 – 10.28.224.178	10.28.224.179
46	10.28.224.180/30	10.28.224.181 – 10.28.224.182	10.28.224.183
47	10.28.224.184/30	10.28.224.185 – 10.28.224.186	10.28.224.187
48	10.28.224.188/30	10.28.224.189 – 10.28.224.190	10.28.224.191
49	10.28.224.192/30	10.28.224.193 – 10.28.224.194	10.28.224.195
50	10.28.224.196/30	10.28.224.197 – 10.28.224.198	10.28.224.199
51	10.28.224.200/30	10.28.224.201 – 10.28.224.202	10.28.224.203
52	10.28.224.204/30	10.28.224.205 – 10.28.224.206	10.28.224.207
53	10.28.224.208/30	10.28.224.209 – 10.28.224.210	10.28.224.211
54	10.28.224.212/30	10.28.224.213 – 10.28.224.214	10.28.224.215
55	10.28.224.216/30	10.28.224.217 – 10.28.224.218	10.28.224.219
56	10.28.224.220/30	10.28.224.221 – 10.28.224.222	10.28.224.223
57	10.28.224.224/30	10.28.224.225 – 10.28.224.226	10.28.224.227
58	10.28.224.228/30	10.28.224.229 – 10.28.224.230	10.28.224.231
59	10.28.224.232/30	10.28.224.233 – 10.28.224.234	10.28.224.235
60	10.28.224.236/30	10.28.224.237 – 10.28.224.238	10.28.224.239
61	10.28.224.240/30	10.28.224.241 – 10.28.224.242	10.28.224.243
62	10.28.224.244/30	10.28.224.245 – 10.28.224.246	10.28.224.247
63	10.28.224.248/30	10.28.224.249 – 10.28.224.250	10.28.224.251
64	10.28.224.252/30	10.28.224.253 – 10.28.224.254	10.28.224.255
65	10.28.225.0/30	10.28.225.1 – 10.28.225.2	10.28.225.3
66	10.28.225.4/30	10.28.225.5 – 10.28.225.6	10.28.225.7
67	10.28.225.8/30	10.28.225.9 – 10.28.225.10	10.28.225.11
68	10.28.225.12/30	10.28.225.13 – 10.28.225.14	10.28.225.15
69	10.28.225.16/30	10.28.225.17 – 10.28.225.18	10.28.225.19
70	10.28.225.20/30	10.28.225.21 – 10.28.225.22	10.28.225.23
71	10.28.225.24/30	10.28.225.25 – 10.28.225.26	10.28.225.27
72	10.28.225.28/30	10.28.225.29 – 10.28.225.30	10.28.225.31
73	10.28.225.32/30	10.28.225.33 – 10.28.225.34	10.28.225.35
74	10.28.225.36/30	10.28.225.37 – 10.28.225.38	10.28.225.39
75	10.28.225.40/30	10.28.225.41 – 10.28.225.42	10.28.225.43
76	10.28.225.44/30	10.28.225.45 – 10.28.225.46	10.28.225.47
77	10.28.225.48/30	10.28.225.49 – 10.28.225.50	10.28.225.51
78	10.28.225.52/30	10.28.225.53 – 10.28.225.54	10.28.225.55
79	10.28.225.56/30	10.28.225.57 – 10.28.225.58	10.28.225.59
80	10.28.225.60/30	10.28.225.61 – 10.28.225.62	10.28.225.63
81	10.28.225.64/30	10.28.225.65 – 10.28.225.66	10.28.225.67
82	10.28.225.68/30	10.28.225.69 – 10.28.225.70	10.28.225.71
83	10.28.225.72/30	10.28.225.73 – 10.28.225.74	10.28.225.75
84	10.28.225.76/30	10.28.225.77 – 10.28.225.78	10.28.225.79
85	10.28.225.80/30	10.28.225.81 – 10.28.225.82	10.28.225.83
86	10.28.225.84/30	10.28.225.85 – 10.28.225.86	10.28.225.87
87	10.28.225.88/30	10.28.225.89 – 10.28.225.90	10.28.225.91
88	10.28.225.92/30	10.28.225.93 – 10.28.225.94	10.28.225.95
89	10.28.225.96/30	10.28.225.97 – 10.28.225.98	10.28.225.99
90	10.28.225.100/30	10.28.225.101 – 10.28.225.102	10.28.225.103
91	10.28.225.104/30	10.28.225.105 – 10.28.225.106	10.28.225.107
92	10.28.225.108/30	10.28.225.109 – 10.28.225.110	10.28.225.111
93	10.28.225.112/30	10.28.225.113 – 10.28.225.114	10.28.225.115
94	10.28.225.116/30	10.28.225.117 – 10.28.225.118	10.28.225.119
95	10.28.225.120/30	10.28.225.121 – 10.28.225.122	10.28.225.123
96	10.28.225.124/30	10.28.225.125 – 10.28.225.126	10.28.225.127
97	10.28.225.128/30	10.28.225.129 – 10.28.225.130	10.28.225.131
98	10.28.225.132/30	10.28.225.133 – 10.28.225.134	10.28.225.135
99	10.28.225.136/30	10.28.225.137 – 10.28.225.138	10.28.225.139
100	10.28.225.140/30	10.28.225.141 – 10.28.225.142	10.28.225.143
101	10.28.225.144/30	10.28.225.145 – 10.28.225.146	10.28.225.147
102	10.28.225.148/30	10.28.225.149 – 10.28.225.150	10.28.225.151
103	10.28.225.152/30	10.28.225.153 – 10.28.225.154	10.28.225.155
104	10.28.225.156/30	10.28.225.157 – 10.28.225.158	10.28.225.159
105	10.28.225.160/30	10.28.225.161 – 10.28.225.162	10.28.225.163
106	10.28.225.164/30	10.28.225.165 – 10.28.225.166	10.28.225.167
107	10.28.225.168/30	10.28.225.169 – 10.28.225.170	10.28.225.171
108	10.28.225.172/30	10.28.225.173 – 10.28.225.174	10.28.225.175
109	10.28.225.176/30	10.28.225.177 – 10.28.225.178	10.28.225.179
110	10.28.225.180/30	10.28.225.181 – 10.28.225.182	10.28.225.183
111	10.28.225.184/30	10.28.225.185 – 10.28.225.186	10.28.225.187
112	10.28.225.188/30	10.28.225.189 – 10.28.225.190	10.28.225.191
113	10.28.225.192/30	10.28.225.193 – 10.28.225.194	10.28.225.195
114	10.28.225.196/30	10.28.225.197 – 10.28.225.198	10.28.225.199
115	10.28.225.200/30	10.28.225.201 – 10.28.225.202	10.28.225.203
116	10.28.225.204/30	10.28.225.205 – 10.28.225.206	10.28.225.207
117	10.28.225.208/30	10.28.225.209 – 10.28.225.210	10.28.225.211
118	10.28.225.212/30	10.28.225.213 – 10.28.225.214	10.28.225.215
119	10.28.225.216/30	10.28.225.217 – 10.28.225.218	10.28.225.219
120	10.28.225.220/30	10.28.225.221 – 10.28.225.222	10.28.225.223
121	10.28.225.224/30	10.28.225.225 – 10.28.225.226	10.28.225.227
122	10.28.225.228/30	10.28.225.229 – 10.28.225.230	10.28.225.231
123	10.28.225.232/30	10.28.225.233 – 10.28.225.234	10.28.225.235
124	10.28.225.236/30	10.28.225.237 – 10.28.225.238	10.28.225.239
125	10.28.225.240/30	10.28.225.241 – 10.28.225.242	10.28.225.243
126	10.28.225.244/30	10.28.225.245 – 10.28.225.246	10.28.225.247
127	10.28.225.248/30	10.28.225.249 – 10.28.225.250	10.28.225.251
128	10.28.225.252/30	10.28.225.253 – 10.28.225.254	10.28.225.255
129	10.28.226.0/30	10.28.226.1 – 10.28.226.2	10.28.226.3
130	10.28.226.4/30	10.28.226.5 – 10.28.226.6	10.28.226.7
131	10.28.226.8/30	10.28.226.9 – 10.28.226.10	10.28.226.11
132	10.28.226.12/30	10.28.226.13 – 10.28.226.14	10.28.226.15
133	10.28.226.16/30	10.28.226.17 – 10.28.226.18	10.28.226.19
134	10.28.226.20/30	10.28.226.21 – 10.28.226.22	10.28.226.23
135	10.28.226.24/30	10.28.226.25 – 10.28.226.26	10.28.226.27
136	10.28.226.28/30	10.28.226.29 – 10.28.226.30	10.28.226.31
137	10.28.226.32/30	10.28.226.33 – 10.28.226.34	10.28.226.35
138	10.28.226.36/30	10.28.226.37 – 10.28.226.38	10.28.226.39
139	10.28.226.40/30	10.28.226.41 – 10.28.226.42	10.28.226.43
140	10.28.226.44/30	10.28.226.45 – 10.28.226.46	10.28.226.47
141	10.28.226.48/30	10.28.226.49 – 10.28.226.50	10.28.226.51
142	10.28.226.52/30	10.28.226.53 – 10.28.226.54	10.28.226.55
143	10.28.226.56/30	10.28.226.57 – 10.28.226.58	10.28.226.59
144	10.28.226.60/30	10.28.226.61 – 10.28.226.62	10.28.226.63
145	10.28.226.64/30	10.28.226.65 – 10.28.226.66	10.28.226.67
146	10.28.226.68/30	10.28.226.69 – 10.28.226.70	10.28.226.71
147	10.28.226.72/30	10.28.226.73 – 10.28.226.74	10.28.226.75
148	10.28.226.76/30	10.28.226.77 – 10.28.226.78	10.28.226.79
149	10.28.226.80/30	10.28.226.81 – 10.28.226.82	10.28.226.83
150	10.28.226.84/30	10.28.226.85 – 10.28.226.86	10.28.226.87
151	10.28.226.88/30	10.28.226.89 – 10.28.226.90	10.28.226.91
152	10.28.226.92/30	10.28.226.93 – 10.28.226.94	10.28.226.95
153	10.28.226.96/30	10.28.226.97 – 10.28.226.98	10.28.226.99
154	10.28.226.100/30	10.28.226.101 – 10.28.226.102	10.28.226.103
155	10.28.226.104/30	10.28.226.105 – 10.28.226.106	10.28.226.107
156	10.28.226.108/30	10.28.226.109 – 10.28.226.110	10.28.226.111
157	10.28.226.112/30	10.28.226.113 – 10.28.226.114	10.28.226.115
158	10.28.226.116/30	10.28.226.117 – 10.28.226.118	10.28.226.119
159	10.28.226.120/30	10.28.226.121 – 10.28.226.122	10.28.226.123
160	10.28.226.124/30	10.28.226.125 – 10.28.226.126	10.28.226.127
161	10.28.226.128/30	10.28.226.129 – 10.28.226.130	10.28.226.131
162	10.28.226.132/30	10.28.226.133 – 10.28.226.134	10.28.226.135
163	10.28.226.136/30	10.28.226.137 – 10.28.226.138	10.28.226.139
164	10.28.226.140/30	10.28.226.141 – 10.28.226.142	10.28.226.143
165	10.28.226.144/30	10.28.226.145 – 10.28.226.146	10.28.226.147
166	10.28.226.148/30	10.28.226.149 – 10.28.226.150	10.28.226.151
167	10.28.226.152/30	10.28.226.153 – 10.28.226.154	10.28.226.155
168	10.28.226.156/30	10.28.226.157 – 10.28.226.158	10.28.226.159
169	10.28.226.160/30	10.28.226.161 – 10.28.226.162	10.28.226.163
170	10.28.226.164/30	10.28.226.165 – 10.28.226.166	10.28.226.167
171	10.28.226.168/30	10.28.226.169 – 10.28.226.170	10.28.226.171
172	10.28.226.172/30	10.28.226.173 – 10.28.226.174	10.28.226.175
173	10.28.226.176/30	10.28.226.177 – 10.28.226.178	10.28.226.179
174	10.28.226.180/30	10.28.226.181 – 10.28.226.182	10.28.226.183
175	10.28.226.184/30	10.28.226.185 – 10.28.226.186	10.28.226.187
176	10.28.226.188/30	10.28.226.189 – 10.28.226.190	10.28.226.191
177	10.28.226.192/30	10.28.226.193 – 10.28.226.194	10.28.226.195
178	10.28.226.196/30	10.28.226.197 – 10.28.226.198	10.28.226.199
179	10.28.226.200/30	10.28.226.201 – 10.28.226.202	10.28.226.203
180	10.28.226.204/30	10.28.226.205 – 10.28.226.206	10.28.226.207
181	10.28.226.208/30	10.28.226.209 – 10.28.226.210	10.28.226.211
182	10.28.226.212/30	10.28.226.213 – 10.28.226.214	10.28.226.215
183	10.28.226.216/30	10.28.226.217 – 10.28.226.218	10.28.226.219
184	10.28.226.220/30	10.28.226.221 – 10.28.226.222	10.28.226.223
185	10.28.226.224/30	10.28.226.225 – 10.28.226.226	10.28.226.227
186	10.28.226.228/30	10.28.226.229 – 10.28.226.230	10.28.226.231
187	10.28.226.232/30	10.28.226.233 – 10.28.226.234	10.28.226.235
188	10.28.226.236/30	10.28.226.237 – 10.28.226.238	10.28.226.239
189	10.28.226.240/30	10.28.226.241 – 10.28.226.242	10.28.226.243
190	10.28.226.244/30	10.28.226.245 – 10.28.226.246	10.28.226.247
191	10.28.226.248/30	10.28.226.249 – 10.28.226.250	10.28.226.251
192	10.28.226.252/30	10.28.226.253 – 10.28.226.254	10.28.226.255
193	10.28.227.0/30	10.28.227.1 – 10.28.227.2	10.28.227.3
194	10.28.227.4/30	10.28.227.5 – 10.28.227.6	10.28.227.7
195	10.28.227.8/30	10.28.227.9 – 10.28.227.10	10.28.227.11
196	10.28.227.12/30	10.28.227.13 – 10.28.227.14	10.28.227.15
197	10.28.227.16/30	10.28.227.17 – 10.28.227.18	10.28.227.19
198	10.28.227.20/30	10.28.227.21 – 10.28.227.22	10.28.227.23
199	10.28.227.24/30	10.28.227.25 – 10.28.227.26	10.28.227.27
200	10.28.227.28/30	10.28.227.29 – 10.28.227.30	10.28.227.31
201	10.28.227.32/30	10.28.227.33 – 10.28.227.34	10.28.227.35
202	10.28.227.36/30	10.28.227.37 – 10.28.227.38	10.28.227.39
203	10.28.227.40/30	10.28.227.41 – 10.28.227.42	10.28.227.43
204	10.28.227.44/30	10.28.227.45 – 10.28.227.46	10.28.227.47
205	10.28.227.48/30	10.28.227.49 – 10.28.227.50	10.28.227.51
206	10.28.227.52/30	10.28.227.53 – 10.28.227.54	10.28.227.55
207	10.28.227.56/30	10.28.227.57 – 10.28.227.58	10.28.227.59
208	10.28.227.60/30	10.28.227.61 – 10.28.227.62	10.28.227.63
209	10.28.227.64/30	10.28.227.65 – 10.28.227.66	10.28.227.67
210	10.28.227.68/30	10.28.227.69 – 10.28.227.70	10.28.227.71
211	10.28.227.72/30	10.28.227.73 – 10.28.227.74	10.28.227.75
212	10.28.227.76/30	10.28.227.77 – 10.28.227.78	10.28.227.79
213	10.28.227.80/30	10.28.227.81 – 10.28.227.82	10.28.227.83
214	10.28.227.84/30	10.28.227.85 – 10.28.227.86	10.28.227.87
215	10.28.227.88/30	10.28.227.89 – 10.28.227.90	10.28.227.91
216	10.28.227.92/30	10.28.227.93 – 10.28.227.94	10.28.227.95
217	10.28.227.96/30	10.28.227.97 – 10.28.227.98	10.28.227.99
218	10.28.227.100/30	10.28.227.101 – 10.28.227.102	10.28.227.103
219	10.28.227.104/30	10.28.227.105 – 10.28.227.106	10.28.227.107
220	10.28.227.108/30	10.28.227.109 – 10.28.227.110	10.28.227.111
221	10.28.227.112/30	10.28.227.113 – 10.28.227.114	10.28.227.115
222	10.28.227.116/30	10.28.227.117 – 10.28.227.118	10.28.227.119
223	10.28.227.120/30	10.28.227.121 – 10.28.227.122	10.28.227.123
224	10.28.227.124/30	10.28.227.125 – 10.28.227.126	10.28.227.127
225	10.28.227.128/30	10.28.227.129 – 10.28.227.130	10.28.227.131
226	10.28.227.132/30	10.28.227.133 – 10.28.227.134	10.28.227.135
227	10.28.227.136/30	10.28.227.137 – 10.28.227.138	10.28.227.139
228	10.28.227.140/30	10.28.227.141 – 10.28.227.142	10.28.227.143
229	10.28.227.144/30	10.28.227.145 – 10.28.227.146	10.28.227.147
230	10.28.227.148/30	10.28.227.149 – 10.28.227.150	10.28.227.151
231	10.28.227.152/30	10.28.227.153 – 10.28.227.154	10.28.227.155
232	10.28.227.156/30	10.28.227.157 – 10.28.227.158	10.28.227.159
233	10.28.227.160/30	10.28.227.161 – 10.28.227.162	10.28.227.163
234	10.28.227.164/30	10.28.227.165 – 10.28.227.166	10.28.227.167
235	10.28.227.168/30	10.28.227.169 – 10.28.227.170	10.28.227.171
236	10.28.227.172/30	10.28.227.173 – 10.28.227.174	10.28.227.175
237	10.28.227.176/30	10.28.227.177 – 10.28.227.178	10.28.227.179
238	10.28.227.180/30	10.28.227.181 – 10.28.227.182	10.28.227.183
239	10.28.227.184/30	10.28.227.185 – 10.28.227.186	10.28.227.187
240	10.28.227.188/30	10.28.227.189 – 10.28.227.190	10.28.227.191
241	10.28.227.192/30	10.28.227.193 – 10.28.227.194	10.28.227.195
242	10.28.227.196/30	10.28.227.197 – 10.28.227.198	10.28.227.199
243	10.28.227.200/30	10.28.227.201 – 10.28.227.202	10.28.227.203
244	10.28.227.204/30	10.28.227.205 – 10.28.227.206	10.28.227.207
245	10.28.227.208/30	10.28.227.209 – 10.28.227.210	10.28.227.211
246	10.28.227.212/30	10.28.227.213 – 10.28.227.214	10.28.227.215
247	10.28.227.216/30	10.28.227.217 – 10.28.227.218	10.28.227.219
248	10.28.227.220/30	10.28.227.221 – 10.28.227.222	10.28.227.223
249	10.28.227.224/30	10.28.227.225 – 10.28.227.226	10.28.227.227
250	10.28.227.228/30	10.28.227.229 – 10.28.227.230	10.28.227.231
251	10.28.227.232/30	10.28.227.233 – 10.28.227.234	10.28.227.235
252	10.28.227.236/30	10.28.227.237 – 10.28.227.238	10.28.227.239
253	10.28.227.240/30	10.28.227.241 – 10.28.227.242	10.28.227.243
254	10.28.227.244/30	10.28.227.245 – 10.28.227.246	10.28.227.247
255	10.28.227.248/30	10.28.227.249 – 10.28.227.250	10.28.227.251
256	10.28.227.252/30	10.28.227.253 – 10.28.227.254	10.28.227.255

showing 256 of 2,048

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →