Data as of Nov 8, 2026
204.228.80.0/24
No anonymizer space · no proxy exits in 30 daysUniversity of Colorado at Boulder · space held by University of Colorado Boulder
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | RPKI |
|---|---|---|---|---|
| 204.228.64.0/18 since May 2005 | AS209 | Residential | 6 |
Network & registry
Origin network
AS104
US
- Name
- University of Colorado at Boulder
- Type
- Education
- Registered
- Apr 9, 1987
- Domain
- colorado.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
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS104 | RADB | Westnet | MAINT-AS14041 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 204.
228. 80. 0/ 24 - Netname
- CU-MISC
- Registrant
- University of Colorado Boulder
- Organization
- University of Colorado Boulder (UCB-2-Z)
- Org address
- Office of Information Technology, Boulder, CO, 80309-0455
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-204-228-80-0-1
- Parent
- NET-204-0-0-0-0
- Created
- Jan 12, 1995
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 12, 1995
- Status
- assigned
Report abuse
Abuse contact
- abuse@
colorado. edu - Name
- Abuse
- Phone
- +1-303-735-4357
- Handle
- ABUSE306-ARIN