Data as of Nov 6, 2026
123.200.136.0/24
No anonymizer space · no proxy exits in 30 daysCerner Corporation Pty Limited · space held by Iseek Communications Pty Ltd
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 123.200.136.0/22 since Apr 2018 | AS9723 | Hosting | 1 | Iseek Communications Pty Ltd | |
| 123.200.128.0/20 since Dec 2006 | AS9723 | Hosting | 2 | Iseek Communications Pty 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 |
|---|---|---|---|---|---|---|
| 123.200.128.0/18 | 16,384 | ISEEK | Iseek Communications Pty Ltd (ORG-ICPL5-AP) · AU | ALLOCATED PORTABLE | — | abuse@ |
| └ 123.200.136.0/22 | 1,024 | ISEEK | unknown | ALLOCATED NON-PORTABLE | — | abuse@ |
Network & registry
Registry
Holder
- Organization
- Iseek Communications Pty Ltd
- Handle
- ORG-ICPL5-AP
- Range
- 123.
200. 128. 0/ 18 - Registration type
- ALLOCATED PORTABLE
- Reallocated to
- Not named in the registry
- Reallocated range
- 123.
200. 136. 0/ 22 - Reallocation type
- ALLOCATED NON-PORTABLE
Origin network
AS137536
AU
- Name
- Cerner Corporation Pty Limited
- Type
- Business
- Registered
- Mar 28, 2018
- Domain
- cerner.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Mar 2007
- Current origin since
- Feb 2019 · 7.7 yr
- Origin networks
- 3
- Last change of origin
- Feb 2019
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 123.200.136.0/24 | AS137536 | /24 | APNIC | RPKI valid |
| 123.200.136.0/22 | AS9723 | /22 | APNIC | Another network |
| 123.200.128.0/20 | AS9723 | /20 | APNIC | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS137536 | APNIC | Iseek Communications Pty Ltd | MAINT-AU-ISEEK | Sep 3, 2020 |
Whois
Registration for this announcement
- Range
- 123.
200. 136. 0/ 22 - Netname
- ISEEK
- Registrant country
- AU
- Organization
- Not stated by the registry
- Type
- ALLOCATED NON-PORTABLE
- Created
- Not stated by the registry
- Updated
- Jun 2, 2021
- Maintainer
- MAINT-AU-ISEEK
- RIR
- APNIC
- Country
- AU
- Delegated
- Nov 20, 2006
- Status
- assigned
Report abuse
Abuse contact
- abuse@
iseek. com. au - Name
- ABUSE INFOPROAU
- Handle
- AI485-AP