CIDR Prefix: /25

Usable Host Range for /25 Subnet

Half Class C subnet ideal for dedicated public or private tier isolation. Pre-calculated routing boundaries, binary mapping mask, cloud provider allocation metrics, and copy-ready Terraform snippets.

100% Free & Secure Client-Side Sandbox

Interactive /25 Subnet Workspace

Pre-loaded Seed: 192.168.1.0/25

Instantly ingest standardized industrial address space assignments from cloud reference blueprints.

Pre-Computed /25 Subnet Technical Specifications

Verified 32-bit Bitwise Calculation Matrix
Subnet Mask (Dotted Decimal)255.255.255.128
Usable Host Capacity126 IPs
Cloud Reserved IPs (AWS)5 IPs
Default Range Seed192.168.1.0/25
Binary Mask Blueprint11111111.11111111.11111111.10000000
CIDR Notation/25
Netmask Address255.255.255.128
Total Host Addresses128
Usable Hosts (Standard IPv4)126 usable IPs
Cloud Net Capacity (AWS / GCP)123 usable IPs(AWS reserves 5 addresses: Network, VPC Router, DNS, Reserved, Broadcast)
Primary Architectural Use CaseHalf Class C subnet ideal for dedicated public or private tier isolation.

Terraform IaC Configuration Block (/25)

Copy-ready infrastructure code
resource "aws_subnet" "subnet_25" {
  vpc_id            = aws_vpc.main.id
  cidr_block        = "192.168.1.0/25"
  availability_zone = "us-east-1a"
  tags = {
    Name = "app-tier-25"
  }
}

Related CIDR Subnet Specifications

← Larger Network (Double Host Capacity)/24 Subnet (254 Usable Hosts)

Standard Class C subnet block widely used in AWS VPC availability zones and LANs.

Smaller Network (Half Host Capacity) →/26 Subnet (62 Usable Hosts)

Quarter Class C subnet standard for API gateway tiers or database subnets.

Popular Cloud & DevOps CIDR Prefixes

/8 Subnet/16 Subnet/20 Subnet/24 Subnet/25 Subnet/26 Subnet/27 Subnet/28 Subnet/30 Subnet/32 Subnet