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CIDR Range

172.216.15.16/31

Addresses
2
2
Sub-ranges
0+
within this block
PTR Density
0.0%
0 of 2 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.

75/100
Moderate
How this score is built

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

All 2 IP addresses in 172.216.15.16/31

Not announced as an exact prefix — covered by the announced supernet 172.216.15.0/24.

Announced prefix
Origin AS
Announcement samples
3,981
Last seen
2026-07-23 15:46:25

RIR Ownership History

Atom feed ⇲

Allocation changes captured weekly from regional internet registry (RIR) delegation files.

Date Event From To
2026-05-10 New Allocation PA

Frequently Asked Questions

What is 172.216.15.16/31?

172.216.15.16/31 is a CIDR network block containing 2 IPv4 addresses (from 172.216.15.16 to 172.216.15.17). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 172.216.15.16/31 network?

The 172.216.15.16/31 range is allocated to Cyberzone S.A. and announced via AS209854 from Albania.

How many IP addresses are in 172.216.15.16/31?

172.216.15.16/31 contains exactly 2 usable IPv4 addresses. A /31 prefix length means 2 addresses are covered by this single routing entry.

Last updated: 2026-07-23 16:25:31 UTC
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