Data as of Nov 3, 2026
63.233.196.0/24
No anonymizer space · no proxy exits in 30 daysUniversity of Colorado Medicine · space held by CenturyLink Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | RPKI |
|---|---|---|---|---|
| 63.224.0.0/12 | AS209 | Residential | 1,094 93 always on |
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 |
|---|---|---|---|---|---|---|
| 63.232.0.0/14 | 262,144 | CENTURYLINK-LEGACY-QWEST-INET-17 | CenturyLink Communications, LLC (CCL-534) · US | Direct Allocation | Oct 11, 1999 | [email protected] |
| └ 63.233.196.0/24 | 256 | 63-233-196-0-24 | University of Colorado Medicine (UP-276) · US | Reassigned | Feb 23, 2026 | — |
Network & registry
IPv4 market
Holder
- Organization
- CenturyLink Communications, LLC
- Handle
- CCL-534
- Range
- 63.232.0.0/14
- Registration type
- Direct Allocation
- Record created
- Oct 11, 1999
Origin network
AS402260
US
- Name
- University of Colorado Medicine
- Type
- Education
- Registered
- Mar 6, 2026
- Domain
- cumedicine.us
- Industry
- Other Schools, Instruction, and Exam Preparation (Trade Schools, Art Schools, Driving Instruction, etc.)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Apr 2026
- Current origin since
- Apr 2026 · 7 mo
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS209 not the origin | ARIN | University Physicians Inc (dba CU Medicine) via Lumen | MNT-UP-276 | Apr 13, 2026 |
| AS3356 not the origin | ARIN | University Physicians Inc (dba CU Medicine) via Lumen | MNT-UP-276 | Apr 13, 2026 |
| AS12213 not the origin | ARIN | University Physicians Inc (dba CU Medicine) via Centersquare | MNT-UP-276 | Apr 13, 2026 |
| AS402260 | ARIN | University Physicians Inc (dba CU Medicine) via Self | MNT-UP-276 | Apr 13, 2026 |
Whois
Registration for this announcement
- Range
- 63.233.196.0/24
- Netname
- 63-233-196-0-24
- Registrant
- University of Colorado Medicine
- Organization
- University of Colorado Medicine (UP-276)
- Org address
- PO Box 110247, Aurora, CO, 80045
- Org country
- US
- Type
- Reassigned
- Handle
- NET-63-233-196-0-1
- Parent
- NET-63-232-0-0-1
- Created
- Feb 23, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 11, 1999
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Centurylink Abuse Desk
- Phone
- +1-877-886-6515
- Handle
- CAD54-ARIN