Data as of Nov 14, 2026
217.31.9.0/24
No anonymizer space · no proxy exits in 30 daysBritish Telecommunications Limited · space held by CSC Computer Sciences Ltd
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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 217.31.0.0/20 | 4,096 | UK-CSC-20001026 | CSC Computer Sciences Ltd (ORG-CSC1-RIPE) · GB | ALLOCATED PA | Jun 14, 2002 | abuse@ |
| └ 217.31.9.0/24 | 256 | CSCUK-Custnet1 | unknown | ASSIGNED PA | Feb 19, 2024 | abuse@ via UK-CSC-20001026 |
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
Registry
Holder
- Organization
- CSC Computer Sciences Ltd
- Handle
- ORG-CSC1-RIPE
- Range
- 217.
31. 0. 0/ 20 - Registration type
- ALLOCATED PA
- Record created
- Jun 14, 2002
Origin network
AS2856
GB
- Name
- British Telecommunications Limited
- Type
- Internet provider
- Registered
- Dec 22, 1993
- Domain
- bt.net
- Website
- www.bt.net
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 12
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Feb 2024
- Current origin since
- Feb 2024 · 2.8 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 217.31.9.0/24 | AS2856 | /24 | RIPE | RPKI valid |
| 217.31.0.0/20 | AS15917 | /20 | RIPE | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS2856 | RIPE | DXC-RIPE-MNT CSCUK-MNT | Mar 15, 2023 |
Whois
Registration for this announcement
- Range
- 217.
31. 9. 0/ 24 - Netname
- CSCUK-Custnet1
- Registrant country
- GB
- Organization
- Not stated by the registry
- Type
- ASSIGNED PA
- Created
- Feb 19, 2024
- Updated
- Dec 2, 2025
- Maintainer
- CSCUK-MNT2
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Oct 26, 2000
- Status
- assigned
Report abuse
Abuse contact
- abuse@
dxc. com - Name
- DXC Technology Abuse-C Team
- Handle
- DTAT1-RIPE