Data as of Nov 14, 2026
207.252.51.0/24
No anonymizer space · no proxy exits in 30 daysLS4KDC Limited · space held by AT&T Enterprises, LLC
Announcement
this exact prefix
RPKI invalid (origin)
Announced by
Type
Unknown
Risk
40 / 100 · Medium
Leased space
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 207.252.0.0/16 since May 2005 | AS7018 | Residential | 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 |
|---|---|---|---|---|---|---|
| 207.252.0.0/16 | 65,536 | CERFNET-BLK-207 | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Nov 21, 1996 | abuse@ |
| └ 207.252.48.0/22 | 1,024 | CERF-THINC-A | CERFnet customer - The Health Information Network Connection (CCHINC-1) · US | Reassigned | Dec 5, 1997 | — |
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 207.
252. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Nov 21, 1996
- Legacy
- yes
Origin network
AS214760
HK
- Name
- LS4KDC Limited
- Type
- Hosting
- Registered
- Jun 5, 2024
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2025
- Current origin since
- Aug 2025 · 1.2 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 207.252.51.0/24 | AS0 | /24 | ARIN | Another network |
Whois
Registration for this announcement
- Range
- 207.
252. 48. 0/ 22 - Netname
- CERF-THINC-A
- Registrant
- CERFnet customer - The Health Information Network Connection
- Organization
- CERFnet customer - The Health Information Network Connection (CCHINC-1)
- Org address
- 1155 Avenue of the Americas, New York, NY, 10036
- Org country
- US
- Type
- Reassigned
- Handle
- NET-207-252-48-0-1
- Parent
- NET-207-252-0-0-1
- Created
- Dec 5, 1997
- RIR
- ARIN
- Country
- US
- Delegated
- Nov 21, 1996
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN