Data as of Nov 5, 2026
81.27.72.224/28
No anonymizer space · no proxy exits in 30 daysMainframe & Cybernetic Systems Limited
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 81.27.72.0/23 | 512 | UK-FRAME-20020411 | Mainframe & Cybernetic Systems Limited (ORG-MCSL9-RIPE) · GB | ALLOCATED PA | Mar 3, 2026 | frank@ |
| └ 81.27.72.224/28 | 16 | ISL-NET-A | ISL Hosted Servers | ASSIGNED PA | Sep 25, 2007 | frank@ 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
Announced by
Covering announcement 81.27.72.0/23
- Prefix
- 81.27.72.0/23
- Announced by
- AS25577 Mainframe & Cybernetic Systems Limited
- Type
- Hosting
- RPKI
- No RPKI
- Netname
- UK-FRAME-20020411
- Registrant
- Mainframe & Cybernetic Systems Limited
- RIR
- RIPE NCC
Routing timeline
Who has announced 81.27.72.0/23
81.27.72.0/23
Routing history
- Pattern
- Stable
- First seen
- Mar 2025
- Current origin since
- Mar 2025 · 1.6 yr
- Origin networks
- 1
IRR
Route objects on 81.27.72.0/23
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS25577 | RIPE | route object | C4L-MNT | Mar 13, 2025 |
Whois
Registration for this announcement
- Range
- 81.
27. 72. 0/ 23 - Netname
- UK-FRAME-20020411
- Registrant
- Mainframe & Cybernetic Systems Limited
- Registrant country
- GB
- Organization
- Mainframe & Cybernetic Systems Limited (ORG-MCSL9-RIPE)
- Org country
- GB
- Type
- ALLOCATED PA
- Created
- Mar 3, 2026
- Updated
- Mar 3, 2026
- Maintainer
- lir-uk-frame-1-MNT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Apr 11, 2002
- Status
- assigned
Report abuse
Abuse contact
- frank@
bec. uk - Name
- Abuse-C Role
- Handle
- AR79596-RIPE