Data as of Nov 8, 2026
77.73.243.40/29
No anonymizer space · no proxy exits in 30 daysIWB Industrielle Werke Basel
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 |
|---|---|---|---|---|---|---|
| 77.73.240.0/21 | 2,048 | CH-IWB-20070402 | IWB Industrielle Werke Basel (ORG-IA673-RIPE) · CH | ALLOCATED PA | Apr 2, 2007 | abuse@ |
| └ 77.73.243.40/29 | 8 | NET-BURCKHARDT-IPv4-PA | Burckhardt Architektur | ASSIGNED PA | May 23, 2008 | abuse@ via CH-IWB-20070402 |
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 77.73.240.0/21
- Prefix
- 77.73.240.0/21
- Announced by
- AS43284 IWB Industrielle Werke Basel
- Type
- Residential
- Proxy exits
- 2
- RPKI
- RPKI valid
- Netname
- CH-IWB-20070402
- Registrant
- IWB Industrielle Werke Basel
- RIR
- RIPE NCC
Origin network
AS43284
CH
- Name
- IWB Industrielle Werke Basel
- Type
- Internet provider
- Registered
- Jul 9, 2007
- Domain
- iwb.ch
- Website
- telekom.iwb.ch/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 77.73.240.0/21
77.73.240.0/21
Routing history
- Pattern
- Stable
- First seen
- Aug 2007
- Current origin since
- Aug 2007 · 19 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 77.73.240.0/21 | AS43284 | /21 | RIPE | RPKI valid |
IRR
Route objects on 77.73.240.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS43284 | RIPE | IWB Telekom IPv4 Aggregate | IWB-MNT | Jul 13, 2026 |
Whois
Registration for this announcement
- Range
- 77.
73. 240. 0/ 21 - Netname
- CH-IWB-20070402
- Registrant
- IWB Industrielle Werke Basel
- Registrant country
- CH
- Organization
- IWB Industrielle Werke Basel (ORG-IA673-RIPE)
- Org country
- CH
- Type
- ALLOCATED PA
- Created
- Apr 2, 2007
- Updated
- Jul 20, 2026
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CH
- Delegated
- Apr 2, 2007
- Status
- assigned
Report abuse
Abuse contact
- abuse@
iwb. ch - Name
- Abuse-C Role
- Handle
- AR14326-RIPE