Data as of Nov 9, 2026
66.73.24.0/23
No anonymizer space · no proxy exits in 30 daysCleveland Clinic Foundation · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 66.72.0.0/15 since May 2011 | AS7018 | Residential | 425 56 always on | AT&T Enterprises, LLC |
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 |
|---|---|---|---|---|---|---|
| 66.72.0.0/15 | 131,072 | SBCIS-SIS80 | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Jan 29, 2001 | abuse@ |
| └ 66.73.24.0/24 | 256 | SBCIS-10179-9231 | unknown | — | — | — |
| └ 66.73.25.0/24 | 256 | SBCIS-10179-9910 | unknown | — | — | — |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
512 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 256 | 50% | 1 | |
| Residential | 256 | 50% | 1 |
Network & registry
Origin network
AS22093
US
- Name
- Cleveland Clinic Foundation
- Type
- Business
- Registered
- Aug 7, 2001
- Domain
- clevelandclinic.org
- Industry
- Hospitals and Medical Centers
- 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 |
|---|---|---|---|---|
| AS19009 not the origin | RADB | Cleveland Clinic Foundation | MAINT-AS19009 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 66.
72. 0. 0/ 15 - Netname
- SBCIS-SIS80
- Registrant
- AT&T Enterprises, LLC
- Organization
- AT&T Enterprises, LLC (AEL-360)
- Org address
- 208 S. Akard St., Dallas, TX, 75202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-66-72-0-0-1
- Parent
- NET-66-0-0-0-0
- Created
- Jan 29, 2001
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 29, 2001
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN