Data as of Nov 14, 2026
199.97.121.0/24
No anonymizer space · no proxy exits in 30 daysWestchester Library System · space held by Cogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 199.97.0.0/16 since Nov 2007 | AS174 | Internet provider | 1 | Cogent Communications, 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 |
|---|---|---|---|---|---|---|
| 199. | 262,144 | COGENT-199-97-98-99-100-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Dec 30, 1993 | abuse@ |
| └ 199.97.121.0/24 | 256 | WESTCHESTER-CGNT-NET-1 | Westchester Library System (WLS-9) · US | Reassigned | Aug 6, 2026 | — |
Network & registry
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 199.
97. 0. 0 - 199. 100. 255. 255 - Registration type
- Direct Allocation
- Record created
- Dec 30, 1993
- Legacy
- yes
Origin network
AS25987
US
- Name
- Westchester Library System
- Type
- Business
- Registered
- Jun 12, 2002
- Domain
- westchesterlibraries.org
- 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
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 199.97.121.0/24 | AS25987 | /24 | ARIN | RPKI valid |
Whois
Registration for this announcement
- Range
- 199.
97. 121. 0/ 24 - Netname
- WESTCHESTER-CGNT-NET-1
- Registrant
- Westchester Library System
- Organization
- Westchester Library System (WLS-9)
- Org address
- 570 Taxter Road, Suite 400, Elmsford, NY, 10523
- Org country
- US
- Type
- Reassigned
- Handle
- NET-199-97-121-0-1
- Parent
- NET-199-97-0-0-1
- Created
- Aug 6, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 30, 1993
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN