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Data as of Nov 7, 2026

173.251.0.0/17

45 residential-proxy exits · 30 days

Cablevision Systems Corp.

Announcement
this exact prefix
RPKI valid
Announced by
AS6128
Type
Residential
58% of it

Residential-proxy exits

Proxy exits
45
0.14% of its addresses · 30 days
Always-on exits
5
11% of its exits
Spread
32 of 128
/24s with at least one exit
Providers
64
selling exits here
Oct 8, 2026 – Nov 6, 2026

Exits seen per day

61K observations
  • Residential
  • Business

/24s with the most always-on exits

/24Always-on exitsProxy exits
173.251.117.0/2445
173.251.56.0/2411
173.251.62.0/2402
173.251.124.0/2402
173.251.23.0/2402
173.251.116.0/2402
173.251.104.0/2402
173.251.48.0/2402
173.251.103.0/2402
173.251.67.0/2402
173.251.58.0/2402
173.251.75.0/2401
173.251.49.0/2401
173.251.50.0/2401
173.251.71.0/2401
173.251.72.0/2401
173.251.12.0/2401
173.251.82.0/2401
173.251.83.0/2401
173.251.86.0/2401
173.251.92.0/2401
173.251.93.0/2401
173.251.66.0/2401
173.251.40.0/2401

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Announcements

Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific

Announcements inside

PrefixOriginTypeProxy exitsHolderRPKI
173.251.19.0/24
since Nov 2010
AS32696UnknownCablevision Systems Corp.
173.251.28.0/24
since Jan 2026
AS54004BusinessCablevision Systems Corp.
173.251.30.0/24
since Feb 2011
AS11737BusinessCablevision Systems Corp.
173.251.32.0/24
since May 2020
AS54004UnknownCablevision Systems Corp.
173.251.54.0/24
since May 2023
AS13599BusinessCablevision Systems Corp.
173.251.60.0/24
since Aug 2016
AS22225BusinessCablevision Systems Corp.
173.251.64.0/24
since Jan 2011
AS16884BusinessCablevision Systems Corp.
173.251.91.0/24
since Aug 2022
AS53725BusinessCablevision Systems Corp.
173.251.110.0/24
since Jun 2020
AS62751Business1Cablevision Systems Corp.
173.251.111.0/24
since Jun 2023
AS53475BusinessCablevision Systems Corp.
173.251.112.0/24AS54004UnknownCablevision Systems Corp.
173.251.114.0/24
since Apr 2022
AS54004UnknownCablevision Systems Corp.
173.251.124.0/24AS54004Business2Cablevision Systems Corp.

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
173.251.0.0/1732,768CVNET-2Cablevision Systems Corp. (CVNT) · USDirect AllocationJun 18, 2010abuse@cv.net
└ 173.251.0.0/24256CVNET-ADFB00unknown———
└ 173.251.1.0/24256CVNET-ADFB10unknown———
└ 173.251.2.0/24256CVNET-ADFB20unknown———
└ 173.251.3.0/24256CVNET-ADFB30unknown———
└ 173.251.4.0/24256CVNET-ADFB40unknown———
└ 173.251.5.0/24256CVNET-ADFB50unknown———
└ 173.251.6.0/24256CVNET-ADFB60unknown———
└ 173.251.7.0/24256CVNET-ADFB70unknown———
└ 173.251.8.0/24256CVNET-ADFB80unknown———
└ 173.251.9.0/24256CVNET-ADFB90unknown———
└ 173.251.10.0/24256CVNET-ADFBA0unknown———
└ 173.251.11.0/24256CVNET-ADFB0B00unknown———
└ 173.251.12.0/2664CVNET-ADFBC00unknown———
└ 173.251.12.64/2664CVNET-ADFBC40unknown———
└ 173.251.12.128/2816CVNET-0XADFB0C80unknown———
└ 173.251.12.144/298CVNET-0XADFB0C90unknown———
└ 173.251.12.152/298CVNET-0XADFB0C98unknown———
└ 173.251.12.160/2732CVNET-ADFB0CA0unknown———
└ 173.251.12.192/298CVNET-ADFB0CC0unknown———
└ 173.251.12.200/298CVNET-ADFB0CC8unknown———
└ 173.251.12.208/298CVNET-ADFB0CD0unknown———
└ 173.251.12.216/298CVNET-ADFB0CD8unknown———
└ 173.251.12.224/298CVNET-ADFB0CE0unknown———
└ 173.251.12.240/298CVNET-ADFB0CF0unknown———
└ 173.251.13.0/24256CVNET-ADFB0D00unknown———
└ 173.251.14.8/298CVNET-ADFB0E08unknown———
└ 173.251.14.16/298CVNET-ADFB0E10unknown———
└ 173.251.14.24/298CVNET-ADFB0E18unknown———
└ 173.251.14.40/298CVNET-ADFB0E28unknown———
└ 173.251.14.48/2816CVNET-ADFB0E30unknown———
└ 173.251.14.64/298CVNET-ADFB0E40unknown———
└ 173.251.14.72/298CVNET-ADFB0E48unknown———
└ 173.251.14.80/298CVNET-ADFB0E50unknown———
└ 173.251.14.88/298CVNET-ADFB0E58unknown———
└ 173.251.14.96/298CVNET-ADFB0E60unknown———
└ 173.251.14.104/298CVNET-ADFB0E68unknown———
└ 173.251.14.112/298CVNET-ADFB0E70unknown———
└ 173.251.14.120/298CVNET-ADFB0E78unknown———
└ 173.251.14.128/2816CVNET-ADFB0E80unknown———
└ 173.251.14.144/298CVNET-ADFB0E90unknown———
└ 173.251.14.152/298CVNET-ADFB0E98unknown———
└ 173.251.14.160/2732CVNET-ADFB0EA0unknown———
└ 173.251.14.192/2816CVNET-ADFB0EC0unknown———
└ 173.251.14.216/298CVNET-ADFB0ED8unknown———
└ 173.251.14.224/298CVNET-ADFB0EE0unknown———
└ 173.251.14.232/298CVNET-ADFB0EE8unknown———
└ 173.251.15.0/24256CVNET-ADFB0F00unknown———
└ 173.251.16.0/25128CVNET-ADFB100unknown———
└ 173.251.16.128/2816CVNET-ADFB1080unknown———
└ 173.251.16.144/298CVNET-ADFB1090unknown———
└ 173.251.16.160/298CVNET-ADFB10A0unknown———
└ 173.251.16.168/298CVNET-ADFB10A8unknown———
└ 173.251.16.176/298CVNET-ADFB10B0unknown———
└ 173.251.16.192/298CVNET-ADFB10C0unknown———
└ 173.251.16.208/2816CVNET-ADFB10D0unknown———
└ 173.251.16.224/298CVNET-ADFB10E0unknown———
└ 173.251.16.232/298CVNET-ADFB10E8unknown———
└ 173.251.16.240/298CVNET-ADFB10F0unknown———
└ 173.251.16.248/298CVNET-ADFB10F8unknown———
└ 173.251.17.0/24256CVNET-ADFB1100unknown———
└ 173.251.18.0/298CVNET-ADFB1200unknown———
└ 173.251.18.32/2816CVNET-ADFB1220unknown———
└ 173.251.18.48/298CVNET-ADFB1230unknown———
└ 173.251.18.56/304CVNET-ADFB1238unknown———
└ 173.251.18.64/2732CVNET-ADFB1240unknown———
└ 173.251.18.96/2816CVNET-ADFB1260unknown———
└ 173.251.18.112/298CVNET-ADFB1270unknown———
└ 173.251.18.120/298CVNET-ADFB1278unknown———
└ 173.251.18.128/2664CVNET-ADFB1280unknown———
└ 173.251.18.192/2664CVNET-ADFB12C0unknown———
└ 173.251.19.0/24256CVNET-ADFB1300AEL Group LLC (C02576313) · USReassignedAug 26, 2010abuse@cv.net
via CVNET-2
└ 173.251.20.0/2732CVNET-ADFB1400unknown———
└ 173.251.20.36/304CVNET-0XADFB1424unknown———
└ 173.251.20.40/298CVNET-0XADFB1428unknown———
└ 173.251.20.64/298CVNET-ADFB1440unknown———
└ 173.251.20.96/2732CVNET-ADFB1460unknown———
└ 173.251.20.128/2816CVNET-ADFB1480unknown———
└ 173.251.20.144/298CVNET-ADFB1490unknown———
└ 173.251.20.152/298CVNET-ADFB1498unknown———
└ 173.251.20.160/298CVNET-ADFB14A0unknown———
└ 173.251.20.168/298CVNET-ADFB14A8unknown———
└ 173.251.20.176/304CVNET-ADFB14B0unknown———
└ 173.251.20.184/298CVNET-ADFB14B8unknown———
└ 173.251.20.192/298CVNET-ADFB14C0unknown———
└ 173.251.20.200/298CVNET-0XADFB14C8unknown———
└ 173.251.20.208/298CVNET-ADFB14D0unknown———
└ 173.251.20.240/2816CVNET-0XADFB14F0unknown———
└ 173.251.21.48/304CVNTunknown———
└ 173.251.21.132/304CVNET-ADFB1584unknown———
└ 173.251.21.212/304CVNET-ADFB15D4unknown———
└ 173.251.22.0/24256CVNET-ADFB1600unknown———
└ 173.251.23.0/2816CVNET-ADFB1700unknown———
└ 173.251.23.16/298CVNET-ADFB1710unknown———
└ 173.251.23.24/298CVNET-ADFB1718unknown———
└ 173.251.23.32/298CVNET-ADFB1720unknown———
└ 173.251.23.40/298CVNET-ADFB1728unknown———
└ 173.251.23.64/2816CVNET-ADFB1740unknown———
└ 173.251.23.80/298CVNET-ADFB1750unknown———
└ 173.251.23.96/298CVNET-ADFB1760unknown———
└ 173.251.23.104/298CVNET-ADFB1768unknown———
└ 173.251.23.112/298CVNET-ADFB1770unknown———
└ 173.251.23.128/298CVNET-ADFB1780unknown———
└ 173.251.23.136/298CVNET-ADFB1788unknown———
└ 173.251.23.144/298CVNET-ADFB1790unknown———
└ 173.251.23.152/298CVNET-ADFB1798unknown———
└ 173.251.23.160/298CVNET-0XADFB17A0unknown———
└ 173.251.23.168/298CVNET-ADFB17A8unknown———
└ 173.251.23.176/298CVNET-ADFB17B0unknown———
└ 173.251.23.184/298CVNET-ADFB17B8unknown———
└ 173.251.23.192/298CVNET-ADFB17C0unknown———
└ 173.251.23.200/298CVNET-ADFB17C8unknown———
└ 173.251.23.208/298CVNET-ADFB17D0unknown———
└ 173.251.23.216/298CVNET-ADFB17D8unknown———
└ 173.251.23.224/2816CVNET-ADFB17E0unknown———
└ 173.251.23.240/304CVNET-ADFB17F0unknown———
└ 173.251.23.244/304CVNET-ADFB17F4unknown———
└ 173.251.23.248/298CVNET-ADFB17F8unknown———
└ 173.251.25.0/24256CVNET-ADFB1900unknown———
└ 173.251.26.0/24256CVNET-ADFB1A00unknown———
└ 173.251.27.0/298CVNET-ADFB1B00unknown———
└ 173.251.27.16/298CVNET-ADFB1B10unknown———
└ 173.251.27.24/298CVNET-ADFB1B18unknown———
└ 173.251.27.40/298CVNET-ADFB1B28unknown———
└ 173.251.27.56/298CVNET-ADFB1B38unknown———
└ 173.251.27.80/298CVNET-ADFB1B50unknown———
└ 173.251.27.88/298CVNET-ADFB1B58unknown———
└ 173.251.27.96/2816CVNET-ADFB1B60unknown———
└ 173.251.27.160/2816CVNET-ADFB1BA0unknown———
└ 173.251.27.176/298CVNET-ADFB1BB0unknown———
└ 173.251.27.184/298CVNET-ADFB1BB8unknown———
└ 173.251.27.192/2816CVNET-ADFB1BC0unknown———
└ 173.251.27.208/2816CVNET-ADFB1BD0unknown———
└ 173.251.28.160/298CVNET-ADFB1CA0unknown———
└ 173.251.28.168/298CVNET-ADFB1CA8unknown———
└ 173.251.28.208/2816CVNTunknown———
└ 173.251.28.232/298CVNTunknown———
└ 173.251.28.248/298CVNTunknown———
└ 173.251.29.0/298CVNET-ADFB1D00unknown———
└ 173.251.29.8/298CVNET-ADFB1D08unknown———
└ 173.251.29.16/298CVNET-ADFB1D10unknown———
└ 173.251.29.24/298CVNET-ADFB1D18unknown———
└ 173.251.29.32/298CVNET-ADFB1D20unknown———
└ 173.251.29.40/298CVNET-ADFB1D28unknown———
└ 173.251.29.48/2816CVNET-ADFB1D30unknown———
└ 173.251.29.64/298CVNET-ADFB1D40unknown———
└ 173.251.29.80/298CVNET-ADFB1D50unknown———
└ 173.251.29.88/298CVNET-ADFB1D58unknown———
└ 173.251.29.104/298CVNET-ADFB1D68unknown———
└ 173.251.29.112/298CVNET-ADFB1D70unknown———
└ 173.251.29.136/298CVNET-ADFB1D88unknown———
└ 173.251.29.144/2816CVNET-ADFB1D90unknown———
└ 173.251.29.160/2732CVNET-ADFB1DA0unknown———
└ 173.251.29.192/298CVNET-ADFB1DC0unknown———
└ 173.251.29.216/298CVNET-ADFB1DD8unknown———
└ 173.251.29.224/298CVNET-ADFB1DE0unknown———
└ 173.251.29.232/298CVNET-ADFB1DE8unknown———
└ 173.251.29.240/298CVNET-ADFB1DF0unknown———
└ 173.251.29.248/298CVNET-ADFB1DF8unknown———
└ 173.251.30.0/24256CVNET-ADFB1E00NU-AGE Managed Services (C02593655) · USReassignedSep 23, 2010abuse@cv.net
via CVNET-2
└ 173.251.31.0/298CVNET-ADFB1F00unknown———
└ 173.251.31.8/298CVNET-ADFB1F08unknown———
└ 173.251.31.16/298CVNET-ADFB1F10unknown———
└ 173.251.31.32/298CVNET-ADFB1F20unknown———
└ 173.251.31.40/298CVNET-ADFB1F28unknown———
└ 173.251.31.48/298CVNET-ADFB1F30unknown———
└ 173.251.31.56/298CVNET-ADFB1F38unknown———
└ 173.251.31.72/298CVNET-ADFB1F48unknown———
└ 173.251.31.80/298CVNET-ADFB1F50unknown———
└ 173.251.31.96/298CVNET-ADFB1F60unknown———
└ 173.251.31.104/298CVNET-ADFB1F68unknown———
└ 173.251.31.112/298CVNET-ADFB1F70unknown———
└ 173.251.31.120/298CVNET-ADFB1F78unknown———
└ 173.251.31.128/25128CVNET-ADFB1F80unknown———
└ 173.251.32.0/24256CVNET-ADFB2000VJ Technologies (C02595251) · USReassignedSep 27, 2010abuse@cv.net
via CVNET-2
└ 173.251.33.8/298CVNET-ADFB2108unknown———
└ 173.251.33.16/2816CVNET-ADFB2110unknown———
└ 173.251.33.48/298CVNET-ADFB2130unknown———
└ 173.251.33.64/304CVNET-ADFB2140unknown———
└ 173.251.33.72/304CVNET-ADFB2148unknown———
└ 173.251.33.80/298CVNET-ADFB2150unknown———
└ 173.251.33.88/298CVNET-ADFB2158unknown———
└ 173.251.33.96/298CVNET-ADFB2160unknown———
└ 173.251.33.104/298CVNET-ADFB2168unknown———
└ 173.251.33.120/298CVNET-ADFB2178unknown———
└ 173.251.33.136/298CVNET-ADFB2188unknown———
└ 173.251.33.144/298CVNET-ADFB2190unknown———
└ 173.251.33.152/298CVNET-ADFB2198unknown———
└ 173.251.33.160/298CVNET-ADFB21A0unknown———
└ 173.251.33.168/298CVNET-ADFB21A8unknown———
└ 173.251.33.176/2816CVNET-ADFB21B0unknown———
└ 173.251.33.192/298CVNET-ADFB21C0unknown———
└ 173.251.33.200/298CVNET-ADFB21C8unknown———
└ 173.251.33.216/298CVNET-0XADFB21D8unknown———
└ 173.251.33.224/298CVNET-ADFB21E0unknown———
└ 173.251.33.240/298CVNET-ADFB21F0unknown———
└ 173.251.33.248/298CVNET-ADFB21F8unknown———
└ 173.251.34.0/298CVNET-ADFB2200unknown———
└ 173.251.34.16/298CVNET-ADFB2210unknown———
└ 173.251.34.24/298CVNET-ADFB2218unknown———
└ 173.251.34.32/2732CVNET-ADFB2220unknown———
← Previous1–200 of 941 · page 1 of 5Next →

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

32,768 addresses
TypeAddressesShareRanges
Residential18,85058%282
Business12,89439%897
Unknown1,0243.1%4

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
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