Data as of Nov 11, 2026
174.44.243.136/29
No anonymizer space · no proxy exits in 30 daysCablevision Systems Corp. · space held by Optimum Online
Network & registry
Announced by
Covering announcement 174.44.0.0/16
- Prefix
- 174.44.0.0/16
- Announced by
- AS6128 Cablevision Systems Corp.
- Type
- Residential
- Proxy exits
- 1,151
- Always-on exits
- 235
- RPKI
- RPKI valid
- Netname
- NETBLK-OOL-1TBLK
- Registrant
- Optimum Online
- 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 174.44.0.0/16
174.44.0.0/16
Routing history
- Pattern
- Stable
- First seen
- Dec 2011
- Current origin since
- Dec 2011 · 15 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 174.44.0.0/16 | AS6128 | /24 | ARIN | RPKI valid |
IRR
Route objects on 174.44.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6128 | ARIN | 111 new south RD | MNT-OPTO | Oct 13, 2022 |
Whois
Registration for this announcement
- Range
- 174.
44. 0. 0/ 16 - Netname
- NETBLK-OOL-1TBLK
- Registrant
- Optimum Online
- Organization
- Optimum Online (OPTO)
- Org address
- 111 new south RD, Hicksville, NY, 11801
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-174-44-0-0-1
- Parent
- NET-174-0-0-0-0
- Created
- Dec 22, 2011
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 22, 2011
- Status
- assigned
Report abuse
Abuse contact
- hostmaster@
alticeusa. com - Name
- OOL Hostmaster
- Phone
- +1-516-803-2300
- Handle
- OH4-ORG-ARIN