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)10.28.160.0/19

network10.28.160.0/19

broadcast10.28.191.255

first host10.28.160.1

last host10.28.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.28.160.0/19

address00001010.00011100.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011100.10100000.00000000

broadcast00001010.00011100.10111111.11111111

green = network part, grey = host part

hex0x0a1ca000

decimal169648128

reverse dns0.160.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:a000

/19 split into /27 · 256 subnets

close ×

#	network	host range	broadcast
1	10.28.160.0/27	10.28.160.1 – 10.28.160.30	10.28.160.31
2	10.28.160.32/27	10.28.160.33 – 10.28.160.62	10.28.160.63
3	10.28.160.64/27	10.28.160.65 – 10.28.160.94	10.28.160.95
4	10.28.160.96/27	10.28.160.97 – 10.28.160.126	10.28.160.127
5	10.28.160.128/27	10.28.160.129 – 10.28.160.158	10.28.160.159
6	10.28.160.160/27	10.28.160.161 – 10.28.160.190	10.28.160.191
7	10.28.160.192/27	10.28.160.193 – 10.28.160.222	10.28.160.223
8	10.28.160.224/27	10.28.160.225 – 10.28.160.254	10.28.160.255
9	10.28.161.0/27	10.28.161.1 – 10.28.161.30	10.28.161.31
10	10.28.161.32/27	10.28.161.33 – 10.28.161.62	10.28.161.63
11	10.28.161.64/27	10.28.161.65 – 10.28.161.94	10.28.161.95
12	10.28.161.96/27	10.28.161.97 – 10.28.161.126	10.28.161.127
13	10.28.161.128/27	10.28.161.129 – 10.28.161.158	10.28.161.159
14	10.28.161.160/27	10.28.161.161 – 10.28.161.190	10.28.161.191
15	10.28.161.192/27	10.28.161.193 – 10.28.161.222	10.28.161.223
16	10.28.161.224/27	10.28.161.225 – 10.28.161.254	10.28.161.255
17	10.28.162.0/27	10.28.162.1 – 10.28.162.30	10.28.162.31
18	10.28.162.32/27	10.28.162.33 – 10.28.162.62	10.28.162.63
19	10.28.162.64/27	10.28.162.65 – 10.28.162.94	10.28.162.95
20	10.28.162.96/27	10.28.162.97 – 10.28.162.126	10.28.162.127
21	10.28.162.128/27	10.28.162.129 – 10.28.162.158	10.28.162.159
22	10.28.162.160/27	10.28.162.161 – 10.28.162.190	10.28.162.191
23	10.28.162.192/27	10.28.162.193 – 10.28.162.222	10.28.162.223
24	10.28.162.224/27	10.28.162.225 – 10.28.162.254	10.28.162.255
25	10.28.163.0/27	10.28.163.1 – 10.28.163.30	10.28.163.31
26	10.28.163.32/27	10.28.163.33 – 10.28.163.62	10.28.163.63
27	10.28.163.64/27	10.28.163.65 – 10.28.163.94	10.28.163.95
28	10.28.163.96/27	10.28.163.97 – 10.28.163.126	10.28.163.127
29	10.28.163.128/27	10.28.163.129 – 10.28.163.158	10.28.163.159
30	10.28.163.160/27	10.28.163.161 – 10.28.163.190	10.28.163.191
31	10.28.163.192/27	10.28.163.193 – 10.28.163.222	10.28.163.223
32	10.28.163.224/27	10.28.163.225 – 10.28.163.254	10.28.163.255
33	10.28.164.0/27	10.28.164.1 – 10.28.164.30	10.28.164.31
34	10.28.164.32/27	10.28.164.33 – 10.28.164.62	10.28.164.63
35	10.28.164.64/27	10.28.164.65 – 10.28.164.94	10.28.164.95
36	10.28.164.96/27	10.28.164.97 – 10.28.164.126	10.28.164.127
37	10.28.164.128/27	10.28.164.129 – 10.28.164.158	10.28.164.159
38	10.28.164.160/27	10.28.164.161 – 10.28.164.190	10.28.164.191
39	10.28.164.192/27	10.28.164.193 – 10.28.164.222	10.28.164.223
40	10.28.164.224/27	10.28.164.225 – 10.28.164.254	10.28.164.255
41	10.28.165.0/27	10.28.165.1 – 10.28.165.30	10.28.165.31
42	10.28.165.32/27	10.28.165.33 – 10.28.165.62	10.28.165.63
43	10.28.165.64/27	10.28.165.65 – 10.28.165.94	10.28.165.95
44	10.28.165.96/27	10.28.165.97 – 10.28.165.126	10.28.165.127
45	10.28.165.128/27	10.28.165.129 – 10.28.165.158	10.28.165.159
46	10.28.165.160/27	10.28.165.161 – 10.28.165.190	10.28.165.191
47	10.28.165.192/27	10.28.165.193 – 10.28.165.222	10.28.165.223
48	10.28.165.224/27	10.28.165.225 – 10.28.165.254	10.28.165.255
49	10.28.166.0/27	10.28.166.1 – 10.28.166.30	10.28.166.31
50	10.28.166.32/27	10.28.166.33 – 10.28.166.62	10.28.166.63
51	10.28.166.64/27	10.28.166.65 – 10.28.166.94	10.28.166.95
52	10.28.166.96/27	10.28.166.97 – 10.28.166.126	10.28.166.127
53	10.28.166.128/27	10.28.166.129 – 10.28.166.158	10.28.166.159
54	10.28.166.160/27	10.28.166.161 – 10.28.166.190	10.28.166.191
55	10.28.166.192/27	10.28.166.193 – 10.28.166.222	10.28.166.223
56	10.28.166.224/27	10.28.166.225 – 10.28.166.254	10.28.166.255
57	10.28.167.0/27	10.28.167.1 – 10.28.167.30	10.28.167.31
58	10.28.167.32/27	10.28.167.33 – 10.28.167.62	10.28.167.63
59	10.28.167.64/27	10.28.167.65 – 10.28.167.94	10.28.167.95
60	10.28.167.96/27	10.28.167.97 – 10.28.167.126	10.28.167.127
61	10.28.167.128/27	10.28.167.129 – 10.28.167.158	10.28.167.159
62	10.28.167.160/27	10.28.167.161 – 10.28.167.190	10.28.167.191
63	10.28.167.192/27	10.28.167.193 – 10.28.167.222	10.28.167.223
64	10.28.167.224/27	10.28.167.225 – 10.28.167.254	10.28.167.255
65	10.28.168.0/27	10.28.168.1 – 10.28.168.30	10.28.168.31
66	10.28.168.32/27	10.28.168.33 – 10.28.168.62	10.28.168.63
67	10.28.168.64/27	10.28.168.65 – 10.28.168.94	10.28.168.95
68	10.28.168.96/27	10.28.168.97 – 10.28.168.126	10.28.168.127
69	10.28.168.128/27	10.28.168.129 – 10.28.168.158	10.28.168.159
70	10.28.168.160/27	10.28.168.161 – 10.28.168.190	10.28.168.191
71	10.28.168.192/27	10.28.168.193 – 10.28.168.222	10.28.168.223
72	10.28.168.224/27	10.28.168.225 – 10.28.168.254	10.28.168.255
73	10.28.169.0/27	10.28.169.1 – 10.28.169.30	10.28.169.31
74	10.28.169.32/27	10.28.169.33 – 10.28.169.62	10.28.169.63
75	10.28.169.64/27	10.28.169.65 – 10.28.169.94	10.28.169.95
76	10.28.169.96/27	10.28.169.97 – 10.28.169.126	10.28.169.127
77	10.28.169.128/27	10.28.169.129 – 10.28.169.158	10.28.169.159
78	10.28.169.160/27	10.28.169.161 – 10.28.169.190	10.28.169.191
79	10.28.169.192/27	10.28.169.193 – 10.28.169.222	10.28.169.223
80	10.28.169.224/27	10.28.169.225 – 10.28.169.254	10.28.169.255
81	10.28.170.0/27	10.28.170.1 – 10.28.170.30	10.28.170.31
82	10.28.170.32/27	10.28.170.33 – 10.28.170.62	10.28.170.63
83	10.28.170.64/27	10.28.170.65 – 10.28.170.94	10.28.170.95
84	10.28.170.96/27	10.28.170.97 – 10.28.170.126	10.28.170.127
85	10.28.170.128/27	10.28.170.129 – 10.28.170.158	10.28.170.159
86	10.28.170.160/27	10.28.170.161 – 10.28.170.190	10.28.170.191
87	10.28.170.192/27	10.28.170.193 – 10.28.170.222	10.28.170.223
88	10.28.170.224/27	10.28.170.225 – 10.28.170.254	10.28.170.255
89	10.28.171.0/27	10.28.171.1 – 10.28.171.30	10.28.171.31
90	10.28.171.32/27	10.28.171.33 – 10.28.171.62	10.28.171.63
91	10.28.171.64/27	10.28.171.65 – 10.28.171.94	10.28.171.95
92	10.28.171.96/27	10.28.171.97 – 10.28.171.126	10.28.171.127
93	10.28.171.128/27	10.28.171.129 – 10.28.171.158	10.28.171.159
94	10.28.171.160/27	10.28.171.161 – 10.28.171.190	10.28.171.191
95	10.28.171.192/27	10.28.171.193 – 10.28.171.222	10.28.171.223
96	10.28.171.224/27	10.28.171.225 – 10.28.171.254	10.28.171.255
97	10.28.172.0/27	10.28.172.1 – 10.28.172.30	10.28.172.31
98	10.28.172.32/27	10.28.172.33 – 10.28.172.62	10.28.172.63
99	10.28.172.64/27	10.28.172.65 – 10.28.172.94	10.28.172.95
100	10.28.172.96/27	10.28.172.97 – 10.28.172.126	10.28.172.127
101	10.28.172.128/27	10.28.172.129 – 10.28.172.158	10.28.172.159
102	10.28.172.160/27	10.28.172.161 – 10.28.172.190	10.28.172.191
103	10.28.172.192/27	10.28.172.193 – 10.28.172.222	10.28.172.223
104	10.28.172.224/27	10.28.172.225 – 10.28.172.254	10.28.172.255
105	10.28.173.0/27	10.28.173.1 – 10.28.173.30	10.28.173.31
106	10.28.173.32/27	10.28.173.33 – 10.28.173.62	10.28.173.63
107	10.28.173.64/27	10.28.173.65 – 10.28.173.94	10.28.173.95
108	10.28.173.96/27	10.28.173.97 – 10.28.173.126	10.28.173.127
109	10.28.173.128/27	10.28.173.129 – 10.28.173.158	10.28.173.159
110	10.28.173.160/27	10.28.173.161 – 10.28.173.190	10.28.173.191
111	10.28.173.192/27	10.28.173.193 – 10.28.173.222	10.28.173.223
112	10.28.173.224/27	10.28.173.225 – 10.28.173.254	10.28.173.255
113	10.28.174.0/27	10.28.174.1 – 10.28.174.30	10.28.174.31
114	10.28.174.32/27	10.28.174.33 – 10.28.174.62	10.28.174.63
115	10.28.174.64/27	10.28.174.65 – 10.28.174.94	10.28.174.95
116	10.28.174.96/27	10.28.174.97 – 10.28.174.126	10.28.174.127
117	10.28.174.128/27	10.28.174.129 – 10.28.174.158	10.28.174.159
118	10.28.174.160/27	10.28.174.161 – 10.28.174.190	10.28.174.191
119	10.28.174.192/27	10.28.174.193 – 10.28.174.222	10.28.174.223
120	10.28.174.224/27	10.28.174.225 – 10.28.174.254	10.28.174.255
121	10.28.175.0/27	10.28.175.1 – 10.28.175.30	10.28.175.31
122	10.28.175.32/27	10.28.175.33 – 10.28.175.62	10.28.175.63
123	10.28.175.64/27	10.28.175.65 – 10.28.175.94	10.28.175.95
124	10.28.175.96/27	10.28.175.97 – 10.28.175.126	10.28.175.127
125	10.28.175.128/27	10.28.175.129 – 10.28.175.158	10.28.175.159
126	10.28.175.160/27	10.28.175.161 – 10.28.175.190	10.28.175.191
127	10.28.175.192/27	10.28.175.193 – 10.28.175.222	10.28.175.223
128	10.28.175.224/27	10.28.175.225 – 10.28.175.254	10.28.175.255
129	10.28.176.0/27	10.28.176.1 – 10.28.176.30	10.28.176.31
130	10.28.176.32/27	10.28.176.33 – 10.28.176.62	10.28.176.63
131	10.28.176.64/27	10.28.176.65 – 10.28.176.94	10.28.176.95
132	10.28.176.96/27	10.28.176.97 – 10.28.176.126	10.28.176.127
133	10.28.176.128/27	10.28.176.129 – 10.28.176.158	10.28.176.159
134	10.28.176.160/27	10.28.176.161 – 10.28.176.190	10.28.176.191
135	10.28.176.192/27	10.28.176.193 – 10.28.176.222	10.28.176.223
136	10.28.176.224/27	10.28.176.225 – 10.28.176.254	10.28.176.255
137	10.28.177.0/27	10.28.177.1 – 10.28.177.30	10.28.177.31
138	10.28.177.32/27	10.28.177.33 – 10.28.177.62	10.28.177.63
139	10.28.177.64/27	10.28.177.65 – 10.28.177.94	10.28.177.95
140	10.28.177.96/27	10.28.177.97 – 10.28.177.126	10.28.177.127
141	10.28.177.128/27	10.28.177.129 – 10.28.177.158	10.28.177.159
142	10.28.177.160/27	10.28.177.161 – 10.28.177.190	10.28.177.191
143	10.28.177.192/27	10.28.177.193 – 10.28.177.222	10.28.177.223
144	10.28.177.224/27	10.28.177.225 – 10.28.177.254	10.28.177.255
145	10.28.178.0/27	10.28.178.1 – 10.28.178.30	10.28.178.31
146	10.28.178.32/27	10.28.178.33 – 10.28.178.62	10.28.178.63
147	10.28.178.64/27	10.28.178.65 – 10.28.178.94	10.28.178.95
148	10.28.178.96/27	10.28.178.97 – 10.28.178.126	10.28.178.127
149	10.28.178.128/27	10.28.178.129 – 10.28.178.158	10.28.178.159
150	10.28.178.160/27	10.28.178.161 – 10.28.178.190	10.28.178.191
151	10.28.178.192/27	10.28.178.193 – 10.28.178.222	10.28.178.223
152	10.28.178.224/27	10.28.178.225 – 10.28.178.254	10.28.178.255
153	10.28.179.0/27	10.28.179.1 – 10.28.179.30	10.28.179.31
154	10.28.179.32/27	10.28.179.33 – 10.28.179.62	10.28.179.63
155	10.28.179.64/27	10.28.179.65 – 10.28.179.94	10.28.179.95
156	10.28.179.96/27	10.28.179.97 – 10.28.179.126	10.28.179.127
157	10.28.179.128/27	10.28.179.129 – 10.28.179.158	10.28.179.159
158	10.28.179.160/27	10.28.179.161 – 10.28.179.190	10.28.179.191
159	10.28.179.192/27	10.28.179.193 – 10.28.179.222	10.28.179.223
160	10.28.179.224/27	10.28.179.225 – 10.28.179.254	10.28.179.255
161	10.28.180.0/27	10.28.180.1 – 10.28.180.30	10.28.180.31
162	10.28.180.32/27	10.28.180.33 – 10.28.180.62	10.28.180.63
163	10.28.180.64/27	10.28.180.65 – 10.28.180.94	10.28.180.95
164	10.28.180.96/27	10.28.180.97 – 10.28.180.126	10.28.180.127
165	10.28.180.128/27	10.28.180.129 – 10.28.180.158	10.28.180.159
166	10.28.180.160/27	10.28.180.161 – 10.28.180.190	10.28.180.191
167	10.28.180.192/27	10.28.180.193 – 10.28.180.222	10.28.180.223
168	10.28.180.224/27	10.28.180.225 – 10.28.180.254	10.28.180.255
169	10.28.181.0/27	10.28.181.1 – 10.28.181.30	10.28.181.31
170	10.28.181.32/27	10.28.181.33 – 10.28.181.62	10.28.181.63
171	10.28.181.64/27	10.28.181.65 – 10.28.181.94	10.28.181.95
172	10.28.181.96/27	10.28.181.97 – 10.28.181.126	10.28.181.127
173	10.28.181.128/27	10.28.181.129 – 10.28.181.158	10.28.181.159
174	10.28.181.160/27	10.28.181.161 – 10.28.181.190	10.28.181.191
175	10.28.181.192/27	10.28.181.193 – 10.28.181.222	10.28.181.223
176	10.28.181.224/27	10.28.181.225 – 10.28.181.254	10.28.181.255
177	10.28.182.0/27	10.28.182.1 – 10.28.182.30	10.28.182.31
178	10.28.182.32/27	10.28.182.33 – 10.28.182.62	10.28.182.63
179	10.28.182.64/27	10.28.182.65 – 10.28.182.94	10.28.182.95
180	10.28.182.96/27	10.28.182.97 – 10.28.182.126	10.28.182.127
181	10.28.182.128/27	10.28.182.129 – 10.28.182.158	10.28.182.159
182	10.28.182.160/27	10.28.182.161 – 10.28.182.190	10.28.182.191
183	10.28.182.192/27	10.28.182.193 – 10.28.182.222	10.28.182.223
184	10.28.182.224/27	10.28.182.225 – 10.28.182.254	10.28.182.255
185	10.28.183.0/27	10.28.183.1 – 10.28.183.30	10.28.183.31
186	10.28.183.32/27	10.28.183.33 – 10.28.183.62	10.28.183.63
187	10.28.183.64/27	10.28.183.65 – 10.28.183.94	10.28.183.95
188	10.28.183.96/27	10.28.183.97 – 10.28.183.126	10.28.183.127
189	10.28.183.128/27	10.28.183.129 – 10.28.183.158	10.28.183.159
190	10.28.183.160/27	10.28.183.161 – 10.28.183.190	10.28.183.191
191	10.28.183.192/27	10.28.183.193 – 10.28.183.222	10.28.183.223
192	10.28.183.224/27	10.28.183.225 – 10.28.183.254	10.28.183.255
193	10.28.184.0/27	10.28.184.1 – 10.28.184.30	10.28.184.31
194	10.28.184.32/27	10.28.184.33 – 10.28.184.62	10.28.184.63
195	10.28.184.64/27	10.28.184.65 – 10.28.184.94	10.28.184.95
196	10.28.184.96/27	10.28.184.97 – 10.28.184.126	10.28.184.127
197	10.28.184.128/27	10.28.184.129 – 10.28.184.158	10.28.184.159
198	10.28.184.160/27	10.28.184.161 – 10.28.184.190	10.28.184.191
199	10.28.184.192/27	10.28.184.193 – 10.28.184.222	10.28.184.223
200	10.28.184.224/27	10.28.184.225 – 10.28.184.254	10.28.184.255
201	10.28.185.0/27	10.28.185.1 – 10.28.185.30	10.28.185.31
202	10.28.185.32/27	10.28.185.33 – 10.28.185.62	10.28.185.63
203	10.28.185.64/27	10.28.185.65 – 10.28.185.94	10.28.185.95
204	10.28.185.96/27	10.28.185.97 – 10.28.185.126	10.28.185.127
205	10.28.185.128/27	10.28.185.129 – 10.28.185.158	10.28.185.159
206	10.28.185.160/27	10.28.185.161 – 10.28.185.190	10.28.185.191
207	10.28.185.192/27	10.28.185.193 – 10.28.185.222	10.28.185.223
208	10.28.185.224/27	10.28.185.225 – 10.28.185.254	10.28.185.255
209	10.28.186.0/27	10.28.186.1 – 10.28.186.30	10.28.186.31
210	10.28.186.32/27	10.28.186.33 – 10.28.186.62	10.28.186.63
211	10.28.186.64/27	10.28.186.65 – 10.28.186.94	10.28.186.95
212	10.28.186.96/27	10.28.186.97 – 10.28.186.126	10.28.186.127
213	10.28.186.128/27	10.28.186.129 – 10.28.186.158	10.28.186.159
214	10.28.186.160/27	10.28.186.161 – 10.28.186.190	10.28.186.191
215	10.28.186.192/27	10.28.186.193 – 10.28.186.222	10.28.186.223
216	10.28.186.224/27	10.28.186.225 – 10.28.186.254	10.28.186.255
217	10.28.187.0/27	10.28.187.1 – 10.28.187.30	10.28.187.31
218	10.28.187.32/27	10.28.187.33 – 10.28.187.62	10.28.187.63
219	10.28.187.64/27	10.28.187.65 – 10.28.187.94	10.28.187.95
220	10.28.187.96/27	10.28.187.97 – 10.28.187.126	10.28.187.127
221	10.28.187.128/27	10.28.187.129 – 10.28.187.158	10.28.187.159
222	10.28.187.160/27	10.28.187.161 – 10.28.187.190	10.28.187.191
223	10.28.187.192/27	10.28.187.193 – 10.28.187.222	10.28.187.223
224	10.28.187.224/27	10.28.187.225 – 10.28.187.254	10.28.187.255
225	10.28.188.0/27	10.28.188.1 – 10.28.188.30	10.28.188.31
226	10.28.188.32/27	10.28.188.33 – 10.28.188.62	10.28.188.63
227	10.28.188.64/27	10.28.188.65 – 10.28.188.94	10.28.188.95
228	10.28.188.96/27	10.28.188.97 – 10.28.188.126	10.28.188.127
229	10.28.188.128/27	10.28.188.129 – 10.28.188.158	10.28.188.159
230	10.28.188.160/27	10.28.188.161 – 10.28.188.190	10.28.188.191
231	10.28.188.192/27	10.28.188.193 – 10.28.188.222	10.28.188.223
232	10.28.188.224/27	10.28.188.225 – 10.28.188.254	10.28.188.255
233	10.28.189.0/27	10.28.189.1 – 10.28.189.30	10.28.189.31
234	10.28.189.32/27	10.28.189.33 – 10.28.189.62	10.28.189.63
235	10.28.189.64/27	10.28.189.65 – 10.28.189.94	10.28.189.95
236	10.28.189.96/27	10.28.189.97 – 10.28.189.126	10.28.189.127
237	10.28.189.128/27	10.28.189.129 – 10.28.189.158	10.28.189.159
238	10.28.189.160/27	10.28.189.161 – 10.28.189.190	10.28.189.191
239	10.28.189.192/27	10.28.189.193 – 10.28.189.222	10.28.189.223
240	10.28.189.224/27	10.28.189.225 – 10.28.189.254	10.28.189.255
241	10.28.190.0/27	10.28.190.1 – 10.28.190.30	10.28.190.31
242	10.28.190.32/27	10.28.190.33 – 10.28.190.62	10.28.190.63
243	10.28.190.64/27	10.28.190.65 – 10.28.190.94	10.28.190.95
244	10.28.190.96/27	10.28.190.97 – 10.28.190.126	10.28.190.127
245	10.28.190.128/27	10.28.190.129 – 10.28.190.158	10.28.190.159
246	10.28.190.160/27	10.28.190.161 – 10.28.190.190	10.28.190.191
247	10.28.190.192/27	10.28.190.193 – 10.28.190.222	10.28.190.223
248	10.28.190.224/27	10.28.190.225 – 10.28.190.254	10.28.190.255
249	10.28.191.0/27	10.28.191.1 – 10.28.191.30	10.28.191.31
250	10.28.191.32/27	10.28.191.33 – 10.28.191.62	10.28.191.63
251	10.28.191.64/27	10.28.191.65 – 10.28.191.94	10.28.191.95
252	10.28.191.96/27	10.28.191.97 – 10.28.191.126	10.28.191.127
253	10.28.191.128/27	10.28.191.129 – 10.28.191.158	10.28.191.159
254	10.28.191.160/27	10.28.191.161 – 10.28.191.190	10.28.191.191
255	10.28.191.192/27	10.28.191.193 – 10.28.191.222	10.28.191.223
256	10.28.191.224/27	10.28.191.225 – 10.28.191.254	10.28.191.255

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 /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 →