Data as of Nov 15, 2026
146.5.20.0/22
No anonymizer space · no proxy exits in 30 daysUniversity of Colorado at Boulder · space held by National Solar Observatory
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 146.5.0.0/16 since Mar 2020 | AS11711 | Business | National Solar Observatory |
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
- Nov 2016
- Current origin since
- Nov 2016 · 10.0 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS104 | RADB | National Solar Observatory at University of Colorado at Boulder | MAINT-AS14041 | Nov 13, 2023 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 146.5.20.0/24 | AS104 | RADB | National Solar Observatory at CU-Boulder | MAINT-AS14041 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 146.
5. 0. 0/ 16 - Netname
- NSO-SUNSPOT
- Registrant
- National Solar Observatory
- Organization
- National Solar Observatory (NSO)
- Org address
- 3665 Discovery Drive, 3rd Floor, Boulder, CO, 80303
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-146-5-0-0-1
- Parent
- NET-146-0-0-0-0
- Created
- Jan 15, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 15, 1991
- Status
- assigned
Report abuse
Abuse contact
- jdoherty@
nso. edu - Name
- Doherty, John
- Phone
- +1-303-735-9059
- Handle
- DOHER14-ARIN