Subnet Expert

CIDR /26 Subnet Reference

Detailed information about IPv4 /26 subnets

/26 Subnet Details

A /26 network offers a small to medium number of usable IP addresses, appropriate for small networks, departments, or network segments.

Key Information

CIDR Notation/26
Subnet Mask255.255.255.192
Binary Subnet Mask11111111 11111111 11111111 11000000

Host Information

Total Addresses64
Usable Hosts (Standard)62
AWS Usable IPs57
Azure Usable IPs57
GCP Usable IPs58

Using /26 in Networks

A CIDR /26 subnet has 62 usable IP addresses for hosts. This is a relatively small subnet suitable for specific network segments.

Smaller subnets like this help improve network security and reduce broadcast domain size.

Cloud Provider Considerations

Cloud providers reserve some IP addresses in each subnet for internal use, resulting in fewer usable IPs:

  • AWS: 57 usable IPs(reserves 5 IPs per subnet)
  • Azure: 57 usable IPs(reserves 5 IPs per subnet)
  • GCP: 58 usable IPs(reserves 4 IPs per subnet)

When planning your cloud infrastructure, consider these reserved addresses to accurately size your subnets.

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