Data as of Nov 7, 2026
131.230.236.0/22
No anonymizer space · no proxy exits in 30 daysSouthern Illinois University - School of Medicine · space held by Southern Illinois University Carbondale
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 131.230.224.0/20 since May 2005 | AS15118 | Business | 1 | Southern Illinois University Carbondale | |
| 131.230.0.0/16 since May 2005 | AS15119 | Business | 214 1 always on | Southern Illinois University Carbondale |
Network & registry
Origin network
AS15118
US
- Name
- Southern Illinois University - School of Medicine
- Type
- Education
- Registered
- Mar 22, 2000
- Domain
- siumed.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2021
- Current origin since
- Jun 2021 · 5.4 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 131.230.236.0/22 | AS15118 | /22 | ARIN | RPKI valid |
| 131.230.224.0/20 | AS15118 | /20 | ARIN | Too specific |
| 131.230.0.0/16 | AS15119 | /16 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS15118 | RADB | Southern Illinois University | MAINT-BLUEBIRD | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 131.
230. 0. 0/ 16 - Netname
- SIU-NET
- Registrant
- Southern Illinois University Carbondale
- Organization
- Southern Illinois University Carbondale (SIU)
- Org address
- IT-Network Engineering, Carbondale, IL, 62901
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-131-230-0-0-1
- Parent
- NET-131-0-0-0-0
- Created
- Jan 30, 1989
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 30, 1989
- Status
- assigned
Report abuse
Abuse contact
- tech@
siu. edu - Name
- Castelli, Anton
- Phone
- +1-618-453-6424
- Handle
- CASTE80-ARIN