Data as of Nov 6, 2026
212.183.28.0/24
No anonymizer space · no proxy exits in 30 daysHolter Verwaltungs GmbH · space held by A1 Telekom Austria AG
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 212.183.0.0/17 since May 2005 | AS8447 | Residential | 25 | A1 Telekom Austria AG |
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 |
|---|---|---|---|---|---|---|
| 212.183.0.0/17 | 32,768 | AT-TELEKOM-990525 | A1 Telekom Austria AG (ORG-TAA1-RIPE) · AT | ALLOCATED PA | — | abuse@ |
| └ 212.183.28.0/24 | 256 | HOLTER-AT | Holter Verwaltungs GmbH (ORG-HVG1-RIPE) · AT | ASSIGNED PA | Nov 21, 2017 | michael. |
Network & registry
IPv4 market
Holder
- Organization
- A1 Telekom Austria AG
- Handle
- ORG-TAA1-RIPE
- Range
- 212.
183. 0. 0/ 17 - Registration type
- ALLOCATED PA
Origin network
AS205003
AT
- Name
- Holter Verwaltungs GmbH
- Type
- Business
- Registered
- Nov 21, 2017
- Domain
- holter.at
- Industry
- Service
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2018
- Current origin since
- Oct 2018 · 8.1 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 212.183.28.0/24 | AS205003 | /24 | RIPE | RPKI valid |
| 212.183.0.0/17 | AS8447 | /24 | RIPE | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS205003 | RIPE | Holter Verwaltungs GmbH | AS8447-MNT | Nov 24, 2017 |
Whois
Registration for this announcement
- Range
- 212.
183. 28. 0/ 24 - Netname
- HOLTER-AT
- Registrant
- Holter Verwaltungs GmbH
- Registrant country
- AT
- Organization
- Holter Verwaltungs GmbH (ORG-HVG1-RIPE)
- Org country
- AT
- Type
- ASSIGNED PA
- Created
- Nov 21, 2017
- Updated
- Sep 18, 2025
- Maintainer
- AS8447-MNT
- RIR
- RIPE NCC
- Country
- AT
- Delegated
- May 25, 1999
- Status
- assigned
Report abuse
Abuse contact
- michael.
stoebich@ holter. at - Name
- Abuse contact role object
- Handle
- ACRO11081-RIPE