Data as of Nov 14, 2026
129.19.151.0/24
No anonymizer space · no proxy exits in 30 daysAdams 12 · space held by Colorado State University
Announcement
this exact prefix
RPKI valid
Announced by
Type
Business
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Sep 18, 2026
from AS13555 Zayo Bandwidth, after 5.1 years unannounced
registry: reallocated to University Corporation for Atmospheric Research by Colorado State University, Jul 30, 2026
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 129.19.0.0/16 since Oct 2009 | AS14041 | Business | 57 4 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 | dns. |
| └ 129.19.128.0/18 | 16,384 | FRGP-PARTICIPANT-ASSIGNMENTS-01 | University Corporation for Atmospheric Research (UCAR-1) · US | Reallocated | Jul 30, 2026 | abuse@ |
| └ 129.19.151.0/24 | 256 | WESTNET-ADAMS12-01 | Adams 12 (AFSS-11) · US | Reassigned | Jul 30, 2026 | — |
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
- Reallocated to
- University Corporation for Atmospheric Research (UCAR-1)
- Reallocated range
- 129.
19. 128. 0/ 18 - Reallocated
- Jul 30, 2026
Origin network
AS30136
US
- Name
- Adams 12
- Type
- Education
- Registered
- Nov 2, 2017
- Domain
- adams12.org
- Industry
- Elementary and Secondary Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Mar 2009
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 3
- Last change of origin
- Sep 18, 2026
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 129.19.151.0/24 | AS30136 | /24 | ARIN | RPKI valid |
| 129.19.0.0/16 | AS14041 | /16 | ARIN | Another network |
Whois
Registration for this announcement
- Range
- 129.
19. 151. 0/ 24 - Netname
- WESTNET-ADAMS12-01
- Registrant
- Adams 12
- Organization
- Adams 12 (AFSS-11)
- Org address
- 1500 E 128th Ave, Thornton, CO, 80241-2601
- Org country
- US
- Type
- Reassigned
- Handle
- NET-129-19-151-0-1
- Parent
- NET-129-19-128-0-1
- Created
- Jul 30, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Jul 8, 1987
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ucar. edu - Name
- Abuse
- Phone
- +1-307-996-4300
- Handle
- ABUSE18-ARIN