Data as of Nov 10, 2026
173.3.2.0/23
No anonymizer space · no proxy exits in 30 daysCablevision Systems Corp. · space held by Optimum Online
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 173.2.0.0/15 | 131,072 | CVISP | Optimum Online (OPTO) · US | Direct Allocation | May 12, 2008 | hostmaster@ |
| └ 173.3.2.0/23 | 512 | OOL-CPE-NYK2NY-173-3-2-0-1-23 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 173.2.0.0/15
- Prefix
- 173.2.0.0/15
- Announced by
- AS6128 Cablevision Systems Corp.
- Type
- Residential
- Proxy exits
- 1,864
- Always-on exits
- 442
- RPKI
- RPKI valid
- Netname
- CVISP
- 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 173.2.0.0/15
173.2.0.0/15
Routing history
- Pattern
- Stable
- First seen
- May 2008
- Current origin since
- May 2008 · 18 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 173.2.0.0/15 | AS6128 | /24 | ARIN | RPKI valid |
IRR
Route objects on 173.2.0.0/15
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6128 | ARIN | 111 new south RD | MNT-OPTO | Oct 13, 2022 |
Whois
Registration for this announcement
- Range
- 173.
2. 0. 0/ 15 - Netname
- CVISP
- Registrant
- Optimum Online
- Organization
- Optimum Online (OPTO)
- Org address
- 111 new south RD, Hicksville, NY, 11801
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-173-2-0-0-1
- Parent
- NET-173-0-0-0-0
- Created
- May 12, 2008
- RIR
- ARIN
- Country
- US
- Delegated
- May 12, 2008
- Status
- assigned
Report abuse
Abuse contact
- hostmaster@
alticeusa. com - Name
- OOL Hostmaster
- Phone
- +1-516-803-2300
- Handle
- OH4-ORG-ARIN