Data as of Nov 11, 2026
148.76.21.0/24
5 residential-proxy exits · 30 daysCablevision Systems Corp. · space held by Optimum Online
Residential-proxy exits
Proxy exits
5
2.0% of its addresses · 30 days
Providers
35
selling exits here
Oct 12, 2026 – Nov 10, 2026
Exits seen per day
3.0K observations
Proxy providers listing exits
- 711Proxy
- Ake.net
- B2Proxy
- BirdProxies
- Byteful
- CliProxy
- DataImpulse
- Evomi
- FLEETPROXY
- FastProxy
- FlashProxy
- FloppyData
- GSocks
- GloryCloud
- Infatica
- InfiniteProxies
- LemonBright
- LemonPrime
- LudaxProxy
- MangoProxy
- MoMoProxy
- NodeProxy
- NovaProxy
- PROXYSCRAPE
- Proxiware
- Proxy4U
- ProxyEmpire
- Proxyma
- RainProxy
- SPYDERPROXY_PREMIUM
- Shifter
- Thordata
- VantageProxies
- VitalExclusive
- ZENPROXY_LITE
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 |
|---|---|---|---|---|---|---|
| 148. | 147,456 | OPTO | Optimum Online (OPTO) · US | Direct Allocation | May 14, 2015 | hostmaster@ |
| └ 148.76.16.0/21 | 2,048 | OOL-CPE-NWRKNJ-148-76-16-0-21 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 148.76.0.0/18
- Prefix
- 148.76.0.0/18
- Announced by
- AS6128 Cablevision Systems Corp.
- Type
- Residential
- Proxy exits
- 252
- Always-on exits
- 48
- RPKI
- RPKI valid
- Netname
- OPTO
- 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 148.76.0.0/18
148.76.0.0/18
Routing history
- Pattern
- Stable
- First seen
- Mar 2026
- Current origin since
- Mar 2026 · 8 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 148.76.0.0/18 | AS6128 | /24 | ARIN | RPKI valid |
IRR
Route objects on 148.76.0.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6128 | ARIN | Optimum Online | MNT-OPTO | Mar 12, 2026 |
Whois
Registration for this announcement
- Range
- 148.
74. 0. 0 - 148. 76. 63. 255 - Netname
- OPTO
- Registrant
- Optimum Online
- Organization
- Optimum Online (OPTO)
- Org address
- 111 new south RD, Hicksville, NY, 11801
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-148-74-0-0-1
- Parent
- NET-148-0-0-0-0
- Created
- May 14, 2015
- RIR
- ARIN
- Country
- US
- Delegated
- May 14, 2015
- Status
- assigned
Report abuse
Abuse contact
- hostmaster@
alticeusa. com - Name
- OOL Hostmaster
- Phone
- +1-516-803-2300
- Handle
- OH4-ORG-ARIN