Data as of Nov 8, 2026

81.27.81.0/24

No anonymizer space · no proxy exits in 30 days

Mainframe & Cybernetic Systems Limited

Announcement

this exact prefix

No RPKI

Announced by

Type

Hosting

Risk

50 / 100 · Medium

Announcements

Less specific

Prefix	Origin	Type	Holder	RPKI
81.27.80.0/22 since Mar 2025	AS25577	Hosting	Mainframe & Cybernetic Systems Limited

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

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
81.27.80.0/22	1,024	UK-FRAME-20020411	Mainframe & Cybernetic Systems Limited (ORG-MCSL9-RIPE) · GB	ALLOCATED PA	Mar 3, 2026	frank@bec.uk
└ 81.27.81.32/27	32	Fincore-NET	Fincore Limited	ASSIGNED PA	Oct 27, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.81.112/28	16	VirtusDC-NET	Enfield DC	ASSIGNED PA	Oct 8, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.81.128/27	32	Redblade-NET	Redblade	ASSIGNED PA	May 12, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.81.176/28	16	OpusDatum-NET	Opus Datum Meridian Gate	ASSIGNED PA	May 9, 2014	frank@bec.uk via UK-FRAME-20020411

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

Origin network