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)10.35.64.0/18

network10.35.64.0/18

broadcast10.35.127.255

first host10.35.64.1

last host10.35.127.254

subnet mask255.255.192.0

wildcard0.0.63.255

addresses16,384

usable hosts16,382

classA

ipcalc 10.35.64.0/18

address00001010.00100011.01000000.00000000

subnet mask11111111.11111111.11000000.00000000

network00001010.00100011.01000000.00000000

broadcast00001010.00100011.01111111.11111111

green = network part, grey = host part

hex0x0a234000

decimal170082304

reverse dns0.64.35.10.in-addr.arpa

ipv4-mapped::ffff:a23:4000

/18 split into /26 · 256 subnets

close ×

#	network	host range	broadcast
1	10.35.64.0/26	10.35.64.1 – 10.35.64.62	10.35.64.63
2	10.35.64.64/26	10.35.64.65 – 10.35.64.126	10.35.64.127
3	10.35.64.128/26	10.35.64.129 – 10.35.64.190	10.35.64.191
4	10.35.64.192/26	10.35.64.193 – 10.35.64.254	10.35.64.255
5	10.35.65.0/26	10.35.65.1 – 10.35.65.62	10.35.65.63
6	10.35.65.64/26	10.35.65.65 – 10.35.65.126	10.35.65.127
7	10.35.65.128/26	10.35.65.129 – 10.35.65.190	10.35.65.191
8	10.35.65.192/26	10.35.65.193 – 10.35.65.254	10.35.65.255
9	10.35.66.0/26	10.35.66.1 – 10.35.66.62	10.35.66.63
10	10.35.66.64/26	10.35.66.65 – 10.35.66.126	10.35.66.127
11	10.35.66.128/26	10.35.66.129 – 10.35.66.190	10.35.66.191
12	10.35.66.192/26	10.35.66.193 – 10.35.66.254	10.35.66.255
13	10.35.67.0/26	10.35.67.1 – 10.35.67.62	10.35.67.63
14	10.35.67.64/26	10.35.67.65 – 10.35.67.126	10.35.67.127
15	10.35.67.128/26	10.35.67.129 – 10.35.67.190	10.35.67.191
16	10.35.67.192/26	10.35.67.193 – 10.35.67.254	10.35.67.255
17	10.35.68.0/26	10.35.68.1 – 10.35.68.62	10.35.68.63
18	10.35.68.64/26	10.35.68.65 – 10.35.68.126	10.35.68.127
19	10.35.68.128/26	10.35.68.129 – 10.35.68.190	10.35.68.191
20	10.35.68.192/26	10.35.68.193 – 10.35.68.254	10.35.68.255
21	10.35.69.0/26	10.35.69.1 – 10.35.69.62	10.35.69.63
22	10.35.69.64/26	10.35.69.65 – 10.35.69.126	10.35.69.127
23	10.35.69.128/26	10.35.69.129 – 10.35.69.190	10.35.69.191
24	10.35.69.192/26	10.35.69.193 – 10.35.69.254	10.35.69.255
25	10.35.70.0/26	10.35.70.1 – 10.35.70.62	10.35.70.63
26	10.35.70.64/26	10.35.70.65 – 10.35.70.126	10.35.70.127
27	10.35.70.128/26	10.35.70.129 – 10.35.70.190	10.35.70.191
28	10.35.70.192/26	10.35.70.193 – 10.35.70.254	10.35.70.255
29	10.35.71.0/26	10.35.71.1 – 10.35.71.62	10.35.71.63
30	10.35.71.64/26	10.35.71.65 – 10.35.71.126	10.35.71.127
31	10.35.71.128/26	10.35.71.129 – 10.35.71.190	10.35.71.191
32	10.35.71.192/26	10.35.71.193 – 10.35.71.254	10.35.71.255
33	10.35.72.0/26	10.35.72.1 – 10.35.72.62	10.35.72.63
34	10.35.72.64/26	10.35.72.65 – 10.35.72.126	10.35.72.127
35	10.35.72.128/26	10.35.72.129 – 10.35.72.190	10.35.72.191
36	10.35.72.192/26	10.35.72.193 – 10.35.72.254	10.35.72.255
37	10.35.73.0/26	10.35.73.1 – 10.35.73.62	10.35.73.63
38	10.35.73.64/26	10.35.73.65 – 10.35.73.126	10.35.73.127
39	10.35.73.128/26	10.35.73.129 – 10.35.73.190	10.35.73.191
40	10.35.73.192/26	10.35.73.193 – 10.35.73.254	10.35.73.255
41	10.35.74.0/26	10.35.74.1 – 10.35.74.62	10.35.74.63
42	10.35.74.64/26	10.35.74.65 – 10.35.74.126	10.35.74.127
43	10.35.74.128/26	10.35.74.129 – 10.35.74.190	10.35.74.191
44	10.35.74.192/26	10.35.74.193 – 10.35.74.254	10.35.74.255
45	10.35.75.0/26	10.35.75.1 – 10.35.75.62	10.35.75.63
46	10.35.75.64/26	10.35.75.65 – 10.35.75.126	10.35.75.127
47	10.35.75.128/26	10.35.75.129 – 10.35.75.190	10.35.75.191
48	10.35.75.192/26	10.35.75.193 – 10.35.75.254	10.35.75.255
49	10.35.76.0/26	10.35.76.1 – 10.35.76.62	10.35.76.63
50	10.35.76.64/26	10.35.76.65 – 10.35.76.126	10.35.76.127
51	10.35.76.128/26	10.35.76.129 – 10.35.76.190	10.35.76.191
52	10.35.76.192/26	10.35.76.193 – 10.35.76.254	10.35.76.255
53	10.35.77.0/26	10.35.77.1 – 10.35.77.62	10.35.77.63
54	10.35.77.64/26	10.35.77.65 – 10.35.77.126	10.35.77.127
55	10.35.77.128/26	10.35.77.129 – 10.35.77.190	10.35.77.191
56	10.35.77.192/26	10.35.77.193 – 10.35.77.254	10.35.77.255
57	10.35.78.0/26	10.35.78.1 – 10.35.78.62	10.35.78.63
58	10.35.78.64/26	10.35.78.65 – 10.35.78.126	10.35.78.127
59	10.35.78.128/26	10.35.78.129 – 10.35.78.190	10.35.78.191
60	10.35.78.192/26	10.35.78.193 – 10.35.78.254	10.35.78.255
61	10.35.79.0/26	10.35.79.1 – 10.35.79.62	10.35.79.63
62	10.35.79.64/26	10.35.79.65 – 10.35.79.126	10.35.79.127
63	10.35.79.128/26	10.35.79.129 – 10.35.79.190	10.35.79.191
64	10.35.79.192/26	10.35.79.193 – 10.35.79.254	10.35.79.255
65	10.35.80.0/26	10.35.80.1 – 10.35.80.62	10.35.80.63
66	10.35.80.64/26	10.35.80.65 – 10.35.80.126	10.35.80.127
67	10.35.80.128/26	10.35.80.129 – 10.35.80.190	10.35.80.191
68	10.35.80.192/26	10.35.80.193 – 10.35.80.254	10.35.80.255
69	10.35.81.0/26	10.35.81.1 – 10.35.81.62	10.35.81.63
70	10.35.81.64/26	10.35.81.65 – 10.35.81.126	10.35.81.127
71	10.35.81.128/26	10.35.81.129 – 10.35.81.190	10.35.81.191
72	10.35.81.192/26	10.35.81.193 – 10.35.81.254	10.35.81.255
73	10.35.82.0/26	10.35.82.1 – 10.35.82.62	10.35.82.63
74	10.35.82.64/26	10.35.82.65 – 10.35.82.126	10.35.82.127
75	10.35.82.128/26	10.35.82.129 – 10.35.82.190	10.35.82.191
76	10.35.82.192/26	10.35.82.193 – 10.35.82.254	10.35.82.255
77	10.35.83.0/26	10.35.83.1 – 10.35.83.62	10.35.83.63
78	10.35.83.64/26	10.35.83.65 – 10.35.83.126	10.35.83.127
79	10.35.83.128/26	10.35.83.129 – 10.35.83.190	10.35.83.191
80	10.35.83.192/26	10.35.83.193 – 10.35.83.254	10.35.83.255
81	10.35.84.0/26	10.35.84.1 – 10.35.84.62	10.35.84.63
82	10.35.84.64/26	10.35.84.65 – 10.35.84.126	10.35.84.127
83	10.35.84.128/26	10.35.84.129 – 10.35.84.190	10.35.84.191
84	10.35.84.192/26	10.35.84.193 – 10.35.84.254	10.35.84.255
85	10.35.85.0/26	10.35.85.1 – 10.35.85.62	10.35.85.63
86	10.35.85.64/26	10.35.85.65 – 10.35.85.126	10.35.85.127
87	10.35.85.128/26	10.35.85.129 – 10.35.85.190	10.35.85.191
88	10.35.85.192/26	10.35.85.193 – 10.35.85.254	10.35.85.255
89	10.35.86.0/26	10.35.86.1 – 10.35.86.62	10.35.86.63
90	10.35.86.64/26	10.35.86.65 – 10.35.86.126	10.35.86.127
91	10.35.86.128/26	10.35.86.129 – 10.35.86.190	10.35.86.191
92	10.35.86.192/26	10.35.86.193 – 10.35.86.254	10.35.86.255
93	10.35.87.0/26	10.35.87.1 – 10.35.87.62	10.35.87.63
94	10.35.87.64/26	10.35.87.65 – 10.35.87.126	10.35.87.127
95	10.35.87.128/26	10.35.87.129 – 10.35.87.190	10.35.87.191
96	10.35.87.192/26	10.35.87.193 – 10.35.87.254	10.35.87.255
97	10.35.88.0/26	10.35.88.1 – 10.35.88.62	10.35.88.63
98	10.35.88.64/26	10.35.88.65 – 10.35.88.126	10.35.88.127
99	10.35.88.128/26	10.35.88.129 – 10.35.88.190	10.35.88.191
100	10.35.88.192/26	10.35.88.193 – 10.35.88.254	10.35.88.255
101	10.35.89.0/26	10.35.89.1 – 10.35.89.62	10.35.89.63
102	10.35.89.64/26	10.35.89.65 – 10.35.89.126	10.35.89.127
103	10.35.89.128/26	10.35.89.129 – 10.35.89.190	10.35.89.191
104	10.35.89.192/26	10.35.89.193 – 10.35.89.254	10.35.89.255
105	10.35.90.0/26	10.35.90.1 – 10.35.90.62	10.35.90.63
106	10.35.90.64/26	10.35.90.65 – 10.35.90.126	10.35.90.127
107	10.35.90.128/26	10.35.90.129 – 10.35.90.190	10.35.90.191
108	10.35.90.192/26	10.35.90.193 – 10.35.90.254	10.35.90.255
109	10.35.91.0/26	10.35.91.1 – 10.35.91.62	10.35.91.63
110	10.35.91.64/26	10.35.91.65 – 10.35.91.126	10.35.91.127
111	10.35.91.128/26	10.35.91.129 – 10.35.91.190	10.35.91.191
112	10.35.91.192/26	10.35.91.193 – 10.35.91.254	10.35.91.255
113	10.35.92.0/26	10.35.92.1 – 10.35.92.62	10.35.92.63
114	10.35.92.64/26	10.35.92.65 – 10.35.92.126	10.35.92.127
115	10.35.92.128/26	10.35.92.129 – 10.35.92.190	10.35.92.191
116	10.35.92.192/26	10.35.92.193 – 10.35.92.254	10.35.92.255
117	10.35.93.0/26	10.35.93.1 – 10.35.93.62	10.35.93.63
118	10.35.93.64/26	10.35.93.65 – 10.35.93.126	10.35.93.127
119	10.35.93.128/26	10.35.93.129 – 10.35.93.190	10.35.93.191
120	10.35.93.192/26	10.35.93.193 – 10.35.93.254	10.35.93.255
121	10.35.94.0/26	10.35.94.1 – 10.35.94.62	10.35.94.63
122	10.35.94.64/26	10.35.94.65 – 10.35.94.126	10.35.94.127
123	10.35.94.128/26	10.35.94.129 – 10.35.94.190	10.35.94.191
124	10.35.94.192/26	10.35.94.193 – 10.35.94.254	10.35.94.255
125	10.35.95.0/26	10.35.95.1 – 10.35.95.62	10.35.95.63
126	10.35.95.64/26	10.35.95.65 – 10.35.95.126	10.35.95.127
127	10.35.95.128/26	10.35.95.129 – 10.35.95.190	10.35.95.191
128	10.35.95.192/26	10.35.95.193 – 10.35.95.254	10.35.95.255
129	10.35.96.0/26	10.35.96.1 – 10.35.96.62	10.35.96.63
130	10.35.96.64/26	10.35.96.65 – 10.35.96.126	10.35.96.127
131	10.35.96.128/26	10.35.96.129 – 10.35.96.190	10.35.96.191
132	10.35.96.192/26	10.35.96.193 – 10.35.96.254	10.35.96.255
133	10.35.97.0/26	10.35.97.1 – 10.35.97.62	10.35.97.63
134	10.35.97.64/26	10.35.97.65 – 10.35.97.126	10.35.97.127
135	10.35.97.128/26	10.35.97.129 – 10.35.97.190	10.35.97.191
136	10.35.97.192/26	10.35.97.193 – 10.35.97.254	10.35.97.255
137	10.35.98.0/26	10.35.98.1 – 10.35.98.62	10.35.98.63
138	10.35.98.64/26	10.35.98.65 – 10.35.98.126	10.35.98.127
139	10.35.98.128/26	10.35.98.129 – 10.35.98.190	10.35.98.191
140	10.35.98.192/26	10.35.98.193 – 10.35.98.254	10.35.98.255
141	10.35.99.0/26	10.35.99.1 – 10.35.99.62	10.35.99.63
142	10.35.99.64/26	10.35.99.65 – 10.35.99.126	10.35.99.127
143	10.35.99.128/26	10.35.99.129 – 10.35.99.190	10.35.99.191
144	10.35.99.192/26	10.35.99.193 – 10.35.99.254	10.35.99.255
145	10.35.100.0/26	10.35.100.1 – 10.35.100.62	10.35.100.63
146	10.35.100.64/26	10.35.100.65 – 10.35.100.126	10.35.100.127
147	10.35.100.128/26	10.35.100.129 – 10.35.100.190	10.35.100.191
148	10.35.100.192/26	10.35.100.193 – 10.35.100.254	10.35.100.255
149	10.35.101.0/26	10.35.101.1 – 10.35.101.62	10.35.101.63
150	10.35.101.64/26	10.35.101.65 – 10.35.101.126	10.35.101.127
151	10.35.101.128/26	10.35.101.129 – 10.35.101.190	10.35.101.191
152	10.35.101.192/26	10.35.101.193 – 10.35.101.254	10.35.101.255
153	10.35.102.0/26	10.35.102.1 – 10.35.102.62	10.35.102.63
154	10.35.102.64/26	10.35.102.65 – 10.35.102.126	10.35.102.127
155	10.35.102.128/26	10.35.102.129 – 10.35.102.190	10.35.102.191
156	10.35.102.192/26	10.35.102.193 – 10.35.102.254	10.35.102.255
157	10.35.103.0/26	10.35.103.1 – 10.35.103.62	10.35.103.63
158	10.35.103.64/26	10.35.103.65 – 10.35.103.126	10.35.103.127
159	10.35.103.128/26	10.35.103.129 – 10.35.103.190	10.35.103.191
160	10.35.103.192/26	10.35.103.193 – 10.35.103.254	10.35.103.255
161	10.35.104.0/26	10.35.104.1 – 10.35.104.62	10.35.104.63
162	10.35.104.64/26	10.35.104.65 – 10.35.104.126	10.35.104.127
163	10.35.104.128/26	10.35.104.129 – 10.35.104.190	10.35.104.191
164	10.35.104.192/26	10.35.104.193 – 10.35.104.254	10.35.104.255
165	10.35.105.0/26	10.35.105.1 – 10.35.105.62	10.35.105.63
166	10.35.105.64/26	10.35.105.65 – 10.35.105.126	10.35.105.127
167	10.35.105.128/26	10.35.105.129 – 10.35.105.190	10.35.105.191
168	10.35.105.192/26	10.35.105.193 – 10.35.105.254	10.35.105.255
169	10.35.106.0/26	10.35.106.1 – 10.35.106.62	10.35.106.63
170	10.35.106.64/26	10.35.106.65 – 10.35.106.126	10.35.106.127
171	10.35.106.128/26	10.35.106.129 – 10.35.106.190	10.35.106.191
172	10.35.106.192/26	10.35.106.193 – 10.35.106.254	10.35.106.255
173	10.35.107.0/26	10.35.107.1 – 10.35.107.62	10.35.107.63
174	10.35.107.64/26	10.35.107.65 – 10.35.107.126	10.35.107.127
175	10.35.107.128/26	10.35.107.129 – 10.35.107.190	10.35.107.191
176	10.35.107.192/26	10.35.107.193 – 10.35.107.254	10.35.107.255
177	10.35.108.0/26	10.35.108.1 – 10.35.108.62	10.35.108.63
178	10.35.108.64/26	10.35.108.65 – 10.35.108.126	10.35.108.127
179	10.35.108.128/26	10.35.108.129 – 10.35.108.190	10.35.108.191
180	10.35.108.192/26	10.35.108.193 – 10.35.108.254	10.35.108.255
181	10.35.109.0/26	10.35.109.1 – 10.35.109.62	10.35.109.63
182	10.35.109.64/26	10.35.109.65 – 10.35.109.126	10.35.109.127
183	10.35.109.128/26	10.35.109.129 – 10.35.109.190	10.35.109.191
184	10.35.109.192/26	10.35.109.193 – 10.35.109.254	10.35.109.255
185	10.35.110.0/26	10.35.110.1 – 10.35.110.62	10.35.110.63
186	10.35.110.64/26	10.35.110.65 – 10.35.110.126	10.35.110.127
187	10.35.110.128/26	10.35.110.129 – 10.35.110.190	10.35.110.191
188	10.35.110.192/26	10.35.110.193 – 10.35.110.254	10.35.110.255
189	10.35.111.0/26	10.35.111.1 – 10.35.111.62	10.35.111.63
190	10.35.111.64/26	10.35.111.65 – 10.35.111.126	10.35.111.127
191	10.35.111.128/26	10.35.111.129 – 10.35.111.190	10.35.111.191
192	10.35.111.192/26	10.35.111.193 – 10.35.111.254	10.35.111.255
193	10.35.112.0/26	10.35.112.1 – 10.35.112.62	10.35.112.63
194	10.35.112.64/26	10.35.112.65 – 10.35.112.126	10.35.112.127
195	10.35.112.128/26	10.35.112.129 – 10.35.112.190	10.35.112.191
196	10.35.112.192/26	10.35.112.193 – 10.35.112.254	10.35.112.255
197	10.35.113.0/26	10.35.113.1 – 10.35.113.62	10.35.113.63
198	10.35.113.64/26	10.35.113.65 – 10.35.113.126	10.35.113.127
199	10.35.113.128/26	10.35.113.129 – 10.35.113.190	10.35.113.191
200	10.35.113.192/26	10.35.113.193 – 10.35.113.254	10.35.113.255
201	10.35.114.0/26	10.35.114.1 – 10.35.114.62	10.35.114.63
202	10.35.114.64/26	10.35.114.65 – 10.35.114.126	10.35.114.127
203	10.35.114.128/26	10.35.114.129 – 10.35.114.190	10.35.114.191
204	10.35.114.192/26	10.35.114.193 – 10.35.114.254	10.35.114.255
205	10.35.115.0/26	10.35.115.1 – 10.35.115.62	10.35.115.63
206	10.35.115.64/26	10.35.115.65 – 10.35.115.126	10.35.115.127
207	10.35.115.128/26	10.35.115.129 – 10.35.115.190	10.35.115.191
208	10.35.115.192/26	10.35.115.193 – 10.35.115.254	10.35.115.255
209	10.35.116.0/26	10.35.116.1 – 10.35.116.62	10.35.116.63
210	10.35.116.64/26	10.35.116.65 – 10.35.116.126	10.35.116.127
211	10.35.116.128/26	10.35.116.129 – 10.35.116.190	10.35.116.191
212	10.35.116.192/26	10.35.116.193 – 10.35.116.254	10.35.116.255
213	10.35.117.0/26	10.35.117.1 – 10.35.117.62	10.35.117.63
214	10.35.117.64/26	10.35.117.65 – 10.35.117.126	10.35.117.127
215	10.35.117.128/26	10.35.117.129 – 10.35.117.190	10.35.117.191
216	10.35.117.192/26	10.35.117.193 – 10.35.117.254	10.35.117.255
217	10.35.118.0/26	10.35.118.1 – 10.35.118.62	10.35.118.63
218	10.35.118.64/26	10.35.118.65 – 10.35.118.126	10.35.118.127
219	10.35.118.128/26	10.35.118.129 – 10.35.118.190	10.35.118.191
220	10.35.118.192/26	10.35.118.193 – 10.35.118.254	10.35.118.255
221	10.35.119.0/26	10.35.119.1 – 10.35.119.62	10.35.119.63
222	10.35.119.64/26	10.35.119.65 – 10.35.119.126	10.35.119.127
223	10.35.119.128/26	10.35.119.129 – 10.35.119.190	10.35.119.191
224	10.35.119.192/26	10.35.119.193 – 10.35.119.254	10.35.119.255
225	10.35.120.0/26	10.35.120.1 – 10.35.120.62	10.35.120.63
226	10.35.120.64/26	10.35.120.65 – 10.35.120.126	10.35.120.127
227	10.35.120.128/26	10.35.120.129 – 10.35.120.190	10.35.120.191
228	10.35.120.192/26	10.35.120.193 – 10.35.120.254	10.35.120.255
229	10.35.121.0/26	10.35.121.1 – 10.35.121.62	10.35.121.63
230	10.35.121.64/26	10.35.121.65 – 10.35.121.126	10.35.121.127
231	10.35.121.128/26	10.35.121.129 – 10.35.121.190	10.35.121.191
232	10.35.121.192/26	10.35.121.193 – 10.35.121.254	10.35.121.255
233	10.35.122.0/26	10.35.122.1 – 10.35.122.62	10.35.122.63
234	10.35.122.64/26	10.35.122.65 – 10.35.122.126	10.35.122.127
235	10.35.122.128/26	10.35.122.129 – 10.35.122.190	10.35.122.191
236	10.35.122.192/26	10.35.122.193 – 10.35.122.254	10.35.122.255
237	10.35.123.0/26	10.35.123.1 – 10.35.123.62	10.35.123.63
238	10.35.123.64/26	10.35.123.65 – 10.35.123.126	10.35.123.127
239	10.35.123.128/26	10.35.123.129 – 10.35.123.190	10.35.123.191
240	10.35.123.192/26	10.35.123.193 – 10.35.123.254	10.35.123.255
241	10.35.124.0/26	10.35.124.1 – 10.35.124.62	10.35.124.63
242	10.35.124.64/26	10.35.124.65 – 10.35.124.126	10.35.124.127
243	10.35.124.128/26	10.35.124.129 – 10.35.124.190	10.35.124.191
244	10.35.124.192/26	10.35.124.193 – 10.35.124.254	10.35.124.255
245	10.35.125.0/26	10.35.125.1 – 10.35.125.62	10.35.125.63
246	10.35.125.64/26	10.35.125.65 – 10.35.125.126	10.35.125.127
247	10.35.125.128/26	10.35.125.129 – 10.35.125.190	10.35.125.191
248	10.35.125.192/26	10.35.125.193 – 10.35.125.254	10.35.125.255
249	10.35.126.0/26	10.35.126.1 – 10.35.126.62	10.35.126.63
250	10.35.126.64/26	10.35.126.65 – 10.35.126.126	10.35.126.127
251	10.35.126.128/26	10.35.126.129 – 10.35.126.190	10.35.126.191
252	10.35.126.192/26	10.35.126.193 – 10.35.126.254	10.35.126.255
253	10.35.127.0/26	10.35.127.1 – 10.35.127.62	10.35.127.63
254	10.35.127.64/26	10.35.127.65 – 10.35.127.126	10.35.127.127
255	10.35.127.128/26	10.35.127.129 – 10.35.127.190	10.35.127.191
256	10.35.127.192/26	10.35.127.193 – 10.35.127.254	10.35.127.255

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 /18
/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	1
/19	255.255.224.0	8,192	8,190	2 split →
/20	255.255.240.0	4,096	4,094	4 split →
/21	255.255.248.0	2,048	2,046	8 split →
/22	255.255.252.0	1,024	1,022	16 split →
/23	255.255.254.0	512	510	32 split →
/24	255.255.255.0	256	254	64 split →
/25	255.255.255.128	128	126	128 split →
/26	255.255.255.192	64	62	256 split →
/27	255.255.255.224	32	30	512 split →
/28	255.255.255.240	16	14	1,024 split →
/29	255.255.255.248	8	6	2,048 split →
/30	255.255.255.252	4	2	4,096 split →
/31	255.255.255.254	2	2	8,192 split →
/32	255.255.255.255	1	1	16,384 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 →