Data as of Nov 3, 2026
129.19.3.0/24
No anonymizer space · no proxy exits in 30 daysColorado State University
Announcement
this exact prefix
RPKI valid
Announced by
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Sep 18, 2026
from AS12145 Colorado State University, after 10.2 years unannounced
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 129.19.0.0/18 | AS12145 | Business | 28 1 always on | Colorado State University via Colorado State University | |
| 129.19.0.0/16 since Oct 2009 | AS14041 | Business | 58 2 always on | Colorado State University |
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 |
|---|---|---|---|---|---|---|
| 129.19.0.0/16 | 65,536 | WESTNET | Colorado State University (CSU-2-Z) · US | Direct Allocation | Jul 8, 1987 | [email protected] |
| └ 129.19.0.0/18 | 16,384 | CSU-FRGP-19 | Colorado State University (CSU-2) · US | Reallocated | Jan 15, 2019 | — |
Network & registry
Registry
Holder
- Organization
- Colorado State University
- Handle
- CSU-2-Z
- Range
- 129.19.0.0/16
- Registration type
- Direct Allocation
- Record created
- Jul 8, 1987
- Legacy
- yes
Origin network
AS12145
US
- Name
- Colorado State University
- Type
- Education
- Registered
- Apr 6, 1999
- Domain
- colostate.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
- Jan 2009
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 129.19.0.0/18 | AS12145 | /24 | ARIN | RPKI valid |
| 129.19.0.0/16 | AS14041 | /16 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS12145 | RADB | City of Loveland | MAINT-AS14041 | Mar 26, 2025 |
Whois
Registration for this announcement
- Range
- 129.19.0.0/18
- Netname
- CSU-FRGP-19
- Registrant
- Colorado State University
- Organization
- Colorado State University (CSU-2)
- Org address
- Academic Computing and Networking Services, Fort Collins, CO, 80523
- Org country
- US
- Type
- Reallocated
- Handle
- NET-129-19-0-0-2
- Parent
- NET-129-19-0-0-1
- Created
- Jan 15, 2019
- RIR
- ARIN
- Country
- US
- Delegated
- Jul 8, 1987
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- DNS Administrator
- Phone
- +1-970-491-5600
- Handle
- DNSAD191-ARIN