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CIDR Range

81.27.92.0/23

Addresses
512
512
Sub-ranges
4+
within this block
PTR Density
11.1%
57 of 512 IPs have PTR

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

74/100
Moderate
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 81.27.92.0/23

First and last addresses in 81.27.92.0/23

81.27.92.0/23 runs from 81.27.92.0 to 81.27.93.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 81.27.88.0/21.

Announced prefix
Origin AS
Announcement samples
12,912
Last seen
2026-11-13 09:19:35

Frequently Asked Questions

What is 81.27.92.0/23?

81.27.92.0/23 is a CIDR network block containing 512 IPv4 addresses (from 81.27.92.0 to 81.27.93.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 81.27.92.0/23 network?

The 81.27.92.0/23 range is allocated to Mainframe & Cybernetic Systems Limited and announced via AS25577 from United Kingdom.

Last updated: 2026-11-13 10:24:05 UTC
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