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CIDR Range

80.66.56.0/21

Addresses
2,048
2.0K
Sub-ranges
2+
within this block
PTR Density
2.3%
48 of 2.0K 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.

81/100
Trusted
How this score is built

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

Ranges inside 80.66.56.0/21

First and last addresses in 80.66.56.0/21

80.66.56.0/21 runs from 80.66.56.0 to 80.66.63.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 80.66.32.0/19.

Announced prefix
Origin AS
Announcement samples
21,437
Last seen
2026-11-13 20:23:10

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date Event From To
2026-05-10 New Allocation — AT

Frequently Asked Questions

What is 80.66.56.0/21?

80.66.56.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 80.66.56.0 to 80.66.63.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 80.66.56.0/21 network?

The 80.66.56.0/21 range is allocated to LinzNet Internet Service Provider GmbH and announced via AS28889 from Austria.

Last updated: 2026-11-13 20:24:05 UTC
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