128.176.131.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

128.176.131.0

Broadcast Address

128.176.131.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

128.176.131.1

Last Usable IP

128.176.131.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (128.176.131.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 128.176.131.127 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	128.176.131.0/25
Network Address	128.176.131.0
Broadcast Address	128.176.131.127
Subnet Mask	255.255.255.128
Wildcard Mask	0.0.0.127
Prefix Length	/25
IP Address Class	Class B
Total IP Addresses	128
Usable Host Addresses	126
First Usable IP	128.176.131.1
Last Usable IP	128.176.131.126
Network (Hex)	0x80B08300
Broadcast (Hex)	0x80B0837F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10000000.10110000.10000011 10000000.10110000.10000011.00000000

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 128.176.131.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.176.131.0/26	128.176.131.0	128.176.131.1	128.176.131.62	128.176.131.63	62
2	128.176.131.64/26	128.176.131.64	128.176.131.65	128.176.131.126	128.176.131.127	62

Split 128.176.131.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.176.131.0/27	128.176.131.0	128.176.131.1	128.176.131.30	128.176.131.31	30
2	128.176.131.32/27	128.176.131.32	128.176.131.33	128.176.131.62	128.176.131.63	30
3	128.176.131.64/27	128.176.131.64	128.176.131.65	128.176.131.94	128.176.131.95	30
4	128.176.131.96/27	128.176.131.96	128.176.131.97	128.176.131.126	128.176.131.127	30

Split 128.176.131.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.176.131.0/28	128.176.131.0	128.176.131.1	128.176.131.14	128.176.131.15	14
2	128.176.131.16/28	128.176.131.16	128.176.131.17	128.176.131.30	128.176.131.31	14
3	128.176.131.32/28	128.176.131.32	128.176.131.33	128.176.131.46	128.176.131.47	14
4	128.176.131.48/28	128.176.131.48	128.176.131.49	128.176.131.62	128.176.131.63	14
5	128.176.131.64/28	128.176.131.64	128.176.131.65	128.176.131.78	128.176.131.79	14
6	128.176.131.80/28	128.176.131.80	128.176.131.81	128.176.131.94	128.176.131.95	14
7	128.176.131.96/28	128.176.131.96	128.176.131.97	128.176.131.110	128.176.131.111	14
8	128.176.131.112/28	128.176.131.112	128.176.131.113	128.176.131.126	128.176.131.127	14

Split 128.176.131.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.176.131.0/29	128.176.131.0	128.176.131.1	128.176.131.6	128.176.131.7	6
2	128.176.131.8/29	128.176.131.8	128.176.131.9	128.176.131.14	128.176.131.15	6
3	128.176.131.16/29	128.176.131.16	128.176.131.17	128.176.131.22	128.176.131.23	6
4	128.176.131.24/29	128.176.131.24	128.176.131.25	128.176.131.30	128.176.131.31	6
5	128.176.131.32/29	128.176.131.32	128.176.131.33	128.176.131.38	128.176.131.39	6
6	128.176.131.40/29	128.176.131.40	128.176.131.41	128.176.131.46	128.176.131.47	6
7	128.176.131.48/29	128.176.131.48	128.176.131.49	128.176.131.54	128.176.131.55	6
8	128.176.131.56/29	128.176.131.56	128.176.131.57	128.176.131.62	128.176.131.63	6
9	128.176.131.64/29	128.176.131.64	128.176.131.65	128.176.131.70	128.176.131.71	6
10	128.176.131.72/29	128.176.131.72	128.176.131.73	128.176.131.78	128.176.131.79	6
11	128.176.131.80/29	128.176.131.80	128.176.131.81	128.176.131.86	128.176.131.87	6
12	128.176.131.88/29	128.176.131.88	128.176.131.89	128.176.131.94	128.176.131.95	6
13	128.176.131.96/29	128.176.131.96	128.176.131.97	128.176.131.102	128.176.131.103	6
14	128.176.131.104/29	128.176.131.104	128.176.131.105	128.176.131.110	128.176.131.111	6
15	128.176.131.112/29	128.176.131.112	128.176.131.113	128.176.131.118	128.176.131.119	6
16	128.176.131.120/29	128.176.131.120	128.176.131.121	128.176.131.126	128.176.131.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

128.176.131.0 net

128.176.131.1

128.176.131.2

128.176.131.3

128.176.131.4

128.176.131.5

128.176.131.6

128.176.131.7

128.176.131.8

128.176.131.9

128.176.131.10

128.176.131.11

128.176.131.12

128.176.131.13

128.176.131.14

128.176.131.15

… 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 128.176.131.0/24 Sibling /25 block 128.176.131.128/25

Adjacent Prefix Sizes

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