● network/25 = Mask 255.255.255.128 • 126 Usable Hosts
/25 Subnet Mask (255.255.255.128): Usable Hosts (126), Wildcard & IPv4 Range
Instant /25 CIDR reference: Subnet Mask is 255.255.255.128, Wildcard 0.0.0.127, Total IPs 128, and 126 Usable Hosts. Ideal for Building Floor LAN & Mid-Size Office Wi-Fi (126 Hosts).
⚡ Instant Calculated Answer
⚡Open Full Interactive Calculator (subnet-calculator) →/25 = Mask 255.255.255.128 • 126 Usable Hosts
📊Reference Table & Engineering Specs
| Parameter / Metric | Specification Value |
|---|---|
| CIDR Prefix Notation | /25 |
| Dotted-Decimal Subnet Mask | 255.255.255.128 |
| Wildcard Mask (OSPF / ACL) | 0.0.0.127 |
| Total IPv4 Addresses (2^7) | 128 IP |
| Total Usable Hosts (2^7 - 2) | 126 Host |
| Sample Network ID | 192.168.1.0/25 |
| Sample Usable Host Range | 192.168.1.1 – 192.168.1.126 |
| Sample Broadcast Address | 192.168.1.127 |
| Ideal Field Use Case | Jaringan Lantai Gedung & Wi-Fi Kantor Menengah (126 Host) |
📖Technical Explanation & Methodology
CIDR prefix /25 allocates 25 network bits and leaves 7 host bits (32 - 25 = 7). Using 2^7, each /25 block contains 128 total IPs and 126 usable host addresses (Building Floor LAN & Mid-Size Office Wi-Fi (126 Hosts)).
💻 Ready-to-Deploy CLI Snippet:
/ip address add address=192.168.1.1/25 interface=bridge-lan comment="Subnet /25 (126 Host) - KalkuNet.com"❓Frequently Asked Questions (FAQ)
What is the Subnet Mask for /25?
The dotted-decimal Subnet Mask for /25 is 255.255.255.128 with a Wildcard Mask of 0.0.0.127.
How many usable hosts are in a /25 network?
A /25 subnet provides 128 total IPs and 126 usable hosts.
🔗Other Related Scenarios
/32 = Mask 255.255.255.255 • 1 Usable Hosts
/32 Subnet Mask (255.255.255.255): Usable Hosts (1), Wildcard & IPv4 Range
/30 = Mask 255.255.255.252 • 2 Usable Hosts
/30 Subnet Mask (255.255.255.252): Usable Hosts (2), Wildcard & IPv4 Range
/29 = Mask 255.255.255.248 • 6 Usable Hosts
/29 Subnet Mask (255.255.255.248): Usable Hosts (6), Wildcard & IPv4 Range
/28 = Mask 255.255.255.240 • 14 Usable Hosts
/28 Subnet Mask (255.255.255.240): Usable Hosts (14), Wildcard & IPv4 Range