LAYER3 INTEL
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Data as of Nov 8, 2026

81.27.88.0/21

No anonymizer space · no proxy exits in 30 days

Mainframe & Cybernetic Systems Limited

Announcement
this exact prefix
No RPKI
Announced by
AS25577
Type
Hosting

Announcements

More specific

Announcements inside

PrefixOriginTypeHolderRPKI
81.27.88.0/22
since Dec 2025
AS25577HostingMainframe & Cybernetic Systems Limited
81.27.92.0/23
since Dec 2025
AS25577Hosting
81.27.92.0/24
since Jan 2026
AS25577HostingMainframe & Cybernetic Systems Limited
81.27.94.0/24
since Dec 2025
AS25577HostingMainframe & Cybernetic Systems Limited
81.27.95.0/24
since Dec 2025
AS25577HostingMainframe & Cybernetic Systems Limited

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
81.27.89.48/28
under 81.27.87.0 - 81.27.92.255
16Secure-Email-Hosting-NETunknownASSIGNED PAJun 29, 2021techadmin@email-checker.com
81.27.89.128/27
under 81.27.87.0 - 81.27.92.255
32Transputec-netTransputec LimitedASSIGNED PANov 9, 2018frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.89.160/28
under 81.27.87.0 - 81.27.92.255
16Secure-Email-Hosting-NETunknownASSIGNED PAJun 29, 2021techadmin@email-checker.com
81.27.89.192/28
under 81.27.87.0 - 81.27.92.255
16IDEGROUPIdegroup InfraASSIGNED PASep 20, 2017frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.89.224/27
under 81.27.87.0 - 81.27.92.255
32SECUREEMAILHOSTING-STORAGE-NETSecure Email Hosting Storage RangeASSIGNED PAJun 24, 2021techadmin@email-checker.com
81.27.90.56/29
under 81.27.87.0 - 81.27.92.255
8SecureHostingSecure Email HostingASSIGNED PASep 16, 2014frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.91.32/29
under 81.27.87.0 - 81.27.92.255
8SecureHostingSecure Email HostingASSIGNED PASep 16, 2014frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.92.32/28
under 81.27.87.0 - 81.27.92.255
16NetworkNeeds-NETNetwork Needs LimitedASSIGNED PASep 17, 2014frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.92.56/29
under 81.27.87.0 - 81.27.92.255
8SecureHostingSecure Email HostingASSIGNED PASep 16, 2014frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.92.64/26
under 81.27.87.0 - 81.27.92.255
64FREEOLA-NETFREEOLA LimitedASSIGNED PASep 15, 2014frank@bec.uk
via 81.27.87.0 - 81.27.92.255
81.27.93.0/24256TR-CERKEZKOY-20020411Cerkezkoy Organize Sanayi Bolgesi (ORG-COSB1-RIPE) · TRALLOCATED PAJan 28, 2026abuse@cosb.org.tr
└ 81.27.93.64/298LipoEngineering-NETTreken Information Management - Lipco EngineeringASSIGNED PASep 17, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.72/298CMP-NETCMP UK LimitedASSIGNED PASep 11, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.80/2816Home-Integration-Solutions-NETHome Integration Solutions LimitedASSIGNED PASep 12, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.96/298BrightCloud-NETBright CloudASSIGNED PASep 3, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.104/298Treken-NETTreken Information Management LtdASSIGNED PAOct 14, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.128/2816SECUREEMAILHOSTING-STORAGE-NETSecure Email Hosting Storage RangeASSIGNED PAJun 24, 2021techadmin@email-checker.com
└ 81.27.93.144/298Treken-NetTreken Information Management - Charge BikesASSIGNED PAAug 28, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.152/298ChapelLane-NETChapel Lane Developments LimitedASSIGNED PAAug 27, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
└ 81.27.93.176/2816FusionWiFi-NETFusion WiFi LimitedASSIGNED PAAug 28, 2014abuse@cosb.org.tr
via TR-CERKEZKOY-20020411
81.27.94.0/23512UK-FRAME-20020411Mainframe & Cybernetic Systems Limited (ORG-MCSL9-RIPE) · GBALLOCATED PAMar 3, 2026frank@bec.uk
└ 81.27.94.128/304HostsUnlimited-NETHost UnlimitedASSIGNED PAJul 30, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.94.132/304HostsUnlimited-NETHost UnlimitedASSIGNED PAJul 30, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.0/298Advantage-Business-NETAdvantage Business SystemsASSIGNED PAJun 26, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.16/2816IDE-INFRA-NETIDE Group InfrastructureASSIGNED PASep 16, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.64/2816Sidereal_Solutions-NETSidereal SolutionsASSIGNED PAJun 25, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.80/2816FOURSLCONSULTINGLIMITED-NET4SL Consulting LtdASSIGNED PAJun 11, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.96/298BUSCOMP-NETBusiness Computing and Network Services LimitedASSIGNED PAJun 11, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.104/298DiamondSprortingGroup-NETDiamond Sprorting GroupASSIGNED PAMay 20, 2014frank@bec.uk
via UK-FRAME-20020411
└ 81.27.95.112/2816ZOPA-NETZOPA LtdASSIGNED PAMay 20, 2014frank@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.

Network & registry

AnnouncementRouting historyWhois & abuse
Registry

Holder

Organization
Not stated by the registry
Origin network

AS25577

GB
Name
Mainframe & Cybernetic Systems Limited
Type
Hosting
Registered
Jan 15, 2003
Domain
bec.uk
Website
bec.uk
Spamhaus ASN-DROP
not listed