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CIDR Range

66.109.18.0/24

Addresses
256
256
Sub-ranges
0+
within this block
PTR Density
23.0%
59 of 256 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.

76/100
Moderate
How this score is built

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

Geolocation

First and last addresses in 66.109.18.0/24

66.109.18.0/24 runs from 66.109.18.0 to 66.109.18.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 66.109.16.0/20.

Announced prefix
Origin AS
Announcement samples
20,220
Last seen
2026-10-27 11:03:22

Frequently Asked Questions

What is 66.109.18.0/24?

66.109.18.0/24 is a CIDR network block containing 256 IPv4 addresses (from 66.109.18.0 to 66.109.18.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 66.109.18.0/24 network?

The 66.109.18.0/24 range is allocated to Cologuard and announced via AS395383 from United States.

How many IP addresses are in 66.109.18.0/24?

66.109.18.0/24 contains exactly 256 usable IPv4 addresses. A /24 prefix length means 256 addresses are covered by this single routing entry.

Last updated: 2026-10-27 11:09:05 UTC
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