Data as of Nov 13, 2026
173.251.2.0/24
No anonymizer space · no proxy exits in 30 daysCablevision Systems Corp.
Network & registry
Announced by
Covering announcement 173.251.0.0/17
- Prefix
- 173.251.0.0/17
- Announced by
- AS6128 Cablevision Systems Corp.
- Type
- Residential
- Proxy exits
- 47
- Always-on exits
- 5
- RPKI
- RPKI valid
- Netname
- CVNET-2
- Registrant
- Cablevision Systems Corp.
- RIR
- ARIN
Origin network
AS6128
US
- Name
- Cablevision Systems Corp.
- Type
- Internet provider
- Domain
- cablevision.com
- Website
- www.optimum.net
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 173.251.0.0/17
173.251.0.0/17
Routing history
- Pattern
- Stable
- First seen
- Jul 2010
- Current origin since
- Jul 2010 · 16 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 173.251.0.0/17 | AS6128 | /24 | ARIN | RPKI valid |
IRR
Route objects on 173.251.0.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6128 | ARIN | Cablevision Systems Corp. | MNT-CVNT | Jul 26, 2010 |
Whois
Registration for this announcement
- Range
- 173.
251. 0. 0/ 17 - Netname
- CVNET-2
- Registrant
- Cablevision Systems Corp.
- Organization
- Cablevision Systems Corp. (CVNT)
- Org address
- 1111 Stewart Avenue, Bethpage, NY, 11714
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-173-251-0-0-1
- Parent
- NET-173-0-0-0-0
- Created
- Jun 18, 2010
- RIR
- ARIN
- Country
- US
- Delegated
- Jun 18, 2010
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cv. net - Name
- OOL Hostmaster
- Phone
- +1-516-803-2400
- Handle
- OOLAB-ARIN