Data as of Nov 9, 2026
217.172.145.0/25
No anonymizer space · no proxy exits in 30 daysSWAN, a.s.
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 |
|---|---|---|---|---|---|---|
| 217.172.144.0/20 | 4,096 | SK-SWAN-20040225 | SWAN, a.s. (ORG-SPA43-RIPE) · SK | ALLOCATED PA | Feb 25, 2004 | ripe-abuse@ |
| └ 217.172.145.0/25 | 128 | SK-BENESTRA-BA | IP Backbone and infrastructure | ASSIGNED PA | Oct 14, 2004 | ripe-abuse@ via SK-SWAN-20040225 |
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 217.172.144.0/20
- Prefix
- 217.172.144.0/20
- Announced by
- AS5578 SWAN, a.s.
- Type
- Internet provider
- RPKI
- RPKI valid
- Netname
- SK-SWAN-20040225
- Registrant
- SWAN, a.s.
- RIR
- RIPE NCC
Origin network
AS5578
SK
- Name
- SWAN, a.s.
- Type
- Internet provider
- Registered
- Mar 18, 1996
- Domain
- swan.sk
- Website
- www.swan.sk/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 217.172.144.0/20
217.172.144.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Apr 2012 · 15 yr
- Origin networks
- 2
- Last change of origin
- Apr 2012
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 217.172.144.0/20 | AS5578 | /20 | RIPE | RPKI valid |
Whois
Registration for this announcement
- Range
- 217.
172. 144. 0/ 20 - Netname
- SK-SWAN-20040225
- Registrant
- SWAN, a.s.
- Registrant country
- SK
- Organization
- SWAN, a.s. (ORG-SPA43-RIPE)
- Org country
- SK
- Type
- ALLOCATED PA
- Created
- Feb 25, 2004
- Updated
- May 10, 2019
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- SK
- Delegated
- Feb 25, 2002
- Status
- assigned
Report abuse
Abuse contact
- ripe-abuse@
swan. sk - Name
- SWAN, a.s. RIPE Role Object
- Handle
- SWAN1-RIPE