Data as of Nov 10, 2026
97.65.16.0/23
No anonymizer space · no proxy exits in 30 daysCOSTAR GROUP Inc. · space held by Level 3 Parent, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 97.65.0.0/16 since Oct 2016 | AS3549 | Internet provider | 8 1 always on | Level 3 Parent, 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 |
|---|---|---|---|---|---|---|
| 97.65.0.0/16 | 65,536 | TWTC-NETBLK-10 | Level 3 Parent, LLC (LPL-141) · US | Direct Allocation | May 14, 2008 | abuse@ |
| └ 97.65.16.0/23 | 512 | TWTC-COST | COSTAR GROUP Inc. (COSTAR-2) · US | Reassigned | Nov 4, 2016 | costarnetworkteam@ |
Network & registry
IPv4 market
Holder
- Organization
- Level 3 Parent, LLC
- Handle
- LPL-141
- Range
- 97.
65. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- May 14, 2008
Origin network
AS14652
US
- Name
- COSTAR GROUP Inc.
- Type
- Business
- Registered
- Jan 20, 2000
- Domain
- costargroup.com
- Industry
- Real Estate (Residential and/or Commercial)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2008
- Current origin since
- Mar 2016 · 11 yr
- Origin networks
- 3
- Last change of origin
- Mar 2016
Recorded history
History
- Handoffs
- 2
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS14652 | RADB | MAINT-AS14652 | Sep 23, 2026 |
Whois
Registration for this announcement
- Range
- 97.
65. 16. 0/ 23 - Netname
- TWTC-COST
- Registrant
- COSTAR GROUP Inc.
- Organization
- COSTAR GROUP Inc. (COSTAR-2)
- Org address
- 1331 L St N.W., Washington, DC, 20005-4293
- Org country
- US
- Type
- Reassigned
- Handle
- NET-97-65-16-0-1
- Parent
- NET-97-65-0-0-1
- Created
- Nov 4, 2016
- RIR
- ARIN
- Country
- US
- Delegated
- May 14, 2008
- Status
- assigned
Report abuse
Abuse contact
- costarnetworkteam@
costar. com - Name
- Costar Network Team
- Phone
- +1-800-204-5960
- Handle
- CNT13-ARIN