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Data as of Nov 3, 2026

148.76.56.0/21

36 residential-proxy exits · 30 days

Cablevision Systems Corp. · space held by Optimum Online

Announcement
148.76.0.0/18
RPKI valid
Announced by
AS6128
Type
Residential
Risk
0 / 100 · Low

Residential-proxy exits

Proxy exits
36
1.8% of its addresses · 30 days
Always-on exits
7
19% of its exits
Spread
6 of 8
/24s with at least one exit
Providers
69
selling exits here
Oct 4, 2026 – Nov 2, 2026

Exits seen per day

35K observations

/24s with the most always-on exits

/24Always-on exitsProxy exits
148.76.59.0/2436
148.76.57.0/24211
148.76.56.0/2417
148.76.60.0/2415
148.76.58.0/2406
148.76.61.0/2401

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • 9Proxy
  • Ake.net
  • AnyIP
  • B2Proxy
  • BirdProxies
  • BlurPath
  • BottingTools
  • Bright Data
  • ByteProxies
  • Byteful
  • CatProxies
  • CliProxy
  • ColaProxy
  • CoreProxy
  • DataImpulse
  • Decodo
  • EnigmaProxy
  • Evomi
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • FloppyData
  • GeekProxy
  • Geonode
  • GloryCloud
  • GonzoProxy
  • IPFly
  • IPOasis
  • IPPeak
  • IPRoyal
  • Infatica
  • InfiniteProxies
  • KocerRoxy
  • LemonBright
  • LudaxProxy
  • MangoProxy
  • MrScraper
  • NextProxy
  • NodeMaven
  • NodeProxy
  • NovProxy
  • NovaProxy
  • Novada
  • Oxylabs
  • PSBProxy
  • PacketStream
  • PrivateProxy
  • Proxies.fo
  • Proxiware
  • Proxy-Seller
  • Proxy4U
  • ProxyEmpire
  • ProxyGeo
  • ProxyRack
  • ProxyWing
  • Proxyma
  • PuraRoute
  • RainProxy
  • Shifter
  • StrikeProxy
  • Thordata
  • ThunderProxy
  • TrueProxies
  • VProxy
  • VantageProxies
  • VitalExclusive
  • WealthProxies

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
148.74.0.0 - 148.76.63.255147,456OPTOOptimum Online (OPTO) · USDirect AllocationMay 14, 2015[email protected]
└ 148.76.56.0/212,048OOL-CPE-MMRNNY-148-76-56-0-1-21unknown———

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
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
212
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