203.42.50.0/25

Public

Class C — /25 prefix — 126 usable hosts

Network Address

203.42.50.0

Broadcast Address

203.42.50.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

203.42.50.1

Last Usable IP

203.42.50.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (203.42.50.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 203.42.50.127 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	203.42.50.0/25
Network Address	203.42.50.0
Broadcast Address	203.42.50.127
Subnet Mask	255.255.255.128
Wildcard Mask	0.0.0.127
Prefix Length	/25
IP Address Class	Class C
Total IP Addresses	128
Usable Host Addresses	126
First Usable IP	203.42.50.1
Last Usable IP	203.42.50.126
Network (Hex)	0xCB2A3200
Broadcast (Hex)	0xCB2A327F
Address Type	Public / Globally Routable

Binary Representation

Network Address

11001011.00101010.00110010 11001011.00101010.00110010.00000000

Subnet Mask

11111111.11111111.11111111.10000000

The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.

Split into Equal Subnets

Split 203.42.50.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.42.50.0/26	203.42.50.0	203.42.50.1	203.42.50.62	203.42.50.63	62
2	203.42.50.64/26	203.42.50.64	203.42.50.65	203.42.50.126	203.42.50.127	62

Split 203.42.50.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.42.50.0/27	203.42.50.0	203.42.50.1	203.42.50.30	203.42.50.31	30
2	203.42.50.32/27	203.42.50.32	203.42.50.33	203.42.50.62	203.42.50.63	30
3	203.42.50.64/27	203.42.50.64	203.42.50.65	203.42.50.94	203.42.50.95	30
4	203.42.50.96/27	203.42.50.96	203.42.50.97	203.42.50.126	203.42.50.127	30

Split 203.42.50.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.42.50.0/28	203.42.50.0	203.42.50.1	203.42.50.14	203.42.50.15	14
2	203.42.50.16/28	203.42.50.16	203.42.50.17	203.42.50.30	203.42.50.31	14
3	203.42.50.32/28	203.42.50.32	203.42.50.33	203.42.50.46	203.42.50.47	14
4	203.42.50.48/28	203.42.50.48	203.42.50.49	203.42.50.62	203.42.50.63	14
5	203.42.50.64/28	203.42.50.64	203.42.50.65	203.42.50.78	203.42.50.79	14
6	203.42.50.80/28	203.42.50.80	203.42.50.81	203.42.50.94	203.42.50.95	14
7	203.42.50.96/28	203.42.50.96	203.42.50.97	203.42.50.110	203.42.50.111	14
8	203.42.50.112/28	203.42.50.112	203.42.50.113	203.42.50.126	203.42.50.127	14

Split 203.42.50.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.42.50.0/29	203.42.50.0	203.42.50.1	203.42.50.6	203.42.50.7	6
2	203.42.50.8/29	203.42.50.8	203.42.50.9	203.42.50.14	203.42.50.15	6
3	203.42.50.16/29	203.42.50.16	203.42.50.17	203.42.50.22	203.42.50.23	6
4	203.42.50.24/29	203.42.50.24	203.42.50.25	203.42.50.30	203.42.50.31	6
5	203.42.50.32/29	203.42.50.32	203.42.50.33	203.42.50.38	203.42.50.39	6
6	203.42.50.40/29	203.42.50.40	203.42.50.41	203.42.50.46	203.42.50.47	6
7	203.42.50.48/29	203.42.50.48	203.42.50.49	203.42.50.54	203.42.50.55	6
8	203.42.50.56/29	203.42.50.56	203.42.50.57	203.42.50.62	203.42.50.63	6
9	203.42.50.64/29	203.42.50.64	203.42.50.65	203.42.50.70	203.42.50.71	6
10	203.42.50.72/29	203.42.50.72	203.42.50.73	203.42.50.78	203.42.50.79	6
11	203.42.50.80/29	203.42.50.80	203.42.50.81	203.42.50.86	203.42.50.87	6
12	203.42.50.88/29	203.42.50.88	203.42.50.89	203.42.50.94	203.42.50.95	6
13	203.42.50.96/29	203.42.50.96	203.42.50.97	203.42.50.102	203.42.50.103	6
14	203.42.50.104/29	203.42.50.104	203.42.50.105	203.42.50.110	203.42.50.111	6
15	203.42.50.112/29	203.42.50.112	203.42.50.113	203.42.50.118	203.42.50.119	6
16	203.42.50.120/29	203.42.50.120	203.42.50.121	203.42.50.126	203.42.50.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

203.42.50.0 net

203.42.50.1

203.42.50.2

203.42.50.3

203.42.50.4

203.42.50.5

203.42.50.6

203.42.50.7

203.42.50.8

203.42.50.9

203.42.50.10

203.42.50.11

203.42.50.12

203.42.50.13

203.42.50.14

203.42.50.15

… 112 more IPs …

/25 Subnet Reference

Total IPs 128

Usable Hosts 126

Subnet Mask 255.255.255.128

Wildcard 0.0.0.127

Full /25 reference →

Related Ranges

Parent /24 block 203.42.50.0/24 Sibling /25 block 203.42.50.128/25

Adjacent Prefix Sizes

/23 510 hosts /24 254 hosts /25 126 hosts /26 62 hosts /27 30 hosts