Data as of Nov 11, 2026

192.243.89.0/24

No anonymizer space · no proxy exits in 30 days

Oracle Corporation · space held by McGraw-Hill Education

Announcement
this exact prefix
RPKI valid
Announced by
Type
Hosting
Risk
50 / 100 · Medium

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
192.243.80.0/204,096MGEHL-NET-BLOCK-01McGraw-Hill Education (MGEHL) · USDirect AllocationJul 25, 2013abuse@mheducation.com
└ 192.243.89.0/24256ORACLE-CLOUD-EASTunknownReassignedOct 13, 2023abuse@mheducation.com
via MGEHL-NET-BLOCK-01

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern
Stable
First seen
Oct 2023
Current origin since
Oct 2023 · 3.0 yr
Origin networks
1