Data as of Nov 6, 2026

81.27.94.0/23

No anonymizer space · no proxy exits in 30 days

Mainframe & Cybernetic Systems Limited

Announcement

No RPKI

Announced by

Type

Hosting

Announcements

More specific

Prefix	Origin	Type	Holder	RPKI
81.27.94.0/24 since Dec 2025	AS25577	Hosting	Mainframe & Cybernetic Systems Limited
81.27.95.0/24 since Dec 2025	AS25577	Hosting	Mainframe & Cybernetic Systems Limited

The registry's network records over this block, widest first, each under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
81.27.94.0/23	512	UK-FRAME-20020411	Mainframe & Cybernetic Systems Limited (ORG-MCSL9-RIPE) · GB	ALLOCATED PA	Mar 3, 2026	frank@bec.uk
└ 81.27.94.128/30	4	HostsUnlimited-NET	Host Unlimited	ASSIGNED PA	Jul 30, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.94.132/30	4	HostsUnlimited-NET	Host Unlimited	ASSIGNED PA	Jul 30, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.0/29	8	Advantage-Business-NET	Advantage Business Systems	ASSIGNED PA	Jun 26, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.16/28	16	IDE-INFRA-NET	IDE Group Infrastructure	ASSIGNED PA	Sep 16, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.64/28	16	Sidereal_Solutions-NET	Sidereal Solutions	ASSIGNED PA	Jun 25, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.80/28	16	FOURSLCONSULTINGLIMITED-NET	4SL Consulting Ltd	ASSIGNED PA	Jun 11, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.96/29	8	BUSCOMP-NET	Business Computing and Network Services Limited	ASSIGNED PA	Jun 11, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.104/29	8	DiamondSprortingGroup-NET	Diamond Sprorting Group	ASSIGNED PA	May 20, 2014	frank@bec.uk via UK-FRAME-20020411
└ 81.27.95.112/28	16	ZOPA-NET	ZOPA Ltd	ASSIGNED PA	May 20, 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.

Announced by

Registry

Origin network