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Data as of Nov 4, 2026

51.19.64.0/18

Anonymizer · ISP proxy

Cox Communications Inc. · space held by Sky UK Limited

Announcement
51.19.0.0/17
RPKI valid
Announced by
AS22773
Type
ISP proxy
Risk
90 / 100 · Critical
Recent change
New origin Jul 2026
its first announcement on record
IPv4 market

Path

Announced by AS22773 since Jul 2026 · 3 mo ago
1 · Holder
Sky UK Limited
record created Feb 5, 2026 · reallocated to Internet Utilities Europe and Asia Limited Feb 5, 2026
2 · Leased from
IPXO
for its owner Sky UK Limited
3 · Announced by
AS22773 Cox Communications Inc.
since Jul 2026 · 3 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 51.19.64.0/18/24s
IPXO
16,384100%
64
Leased from

Owners leasing their own space

NameIn 51.19.64.0/18/24s
Sky UK Limited
16,384100%
64

Registrations in this block

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

RangeAddressesNetnameHolderTypeCreatedAbuse contact
51.19.0.0/1665,536UK-SKY-19930901Sky UK Limited (ORG-SUL39-RIPE) · GBALLOCATED PAFeb 5, 2026[email protected]
└ 51.19.0.0/1732,768SKY-LEASED-IPXOInternet Utilities Europe and Asia Limited (ORG-IL687-RIPE) · GBSUB-ALLOCATED PAFeb 5, 2026[email protected]

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 51.19.0.0/17

Prefix
51.19.0.0/17
Announced by
AS22773 Cox Communications Inc.
Type
ISP proxy
Anonymizer addresses
28,672 addresses · 88%
Leased from
IP broker IPXO
RPKI
RPKI valid
Netname
SKY-LEASED-IPXO
Registrant
Internet Utilities Europe and Asia Limited
RIR
RIPE NCC
IPv4 market

Holder

Holder in the market →
Organization
Sky UK Limited
Handle
ORG-SUL39-RIPE
Range
51.19.0.0/16
Registration type
ALLOCATED PA
Record created
Feb 5, 2026
Reallocated to
Internet Utilities Europe and Asia Limited (ORG-IL687-RIPE)
Reallocated range
51.19.0.0/17
Reallocation type
SUB-ALLOCATED PA
Reallocated
Feb 5, 2026
Origin network

AS22773

US
Name
Cox Communications Inc.
Type
Internet provider
Registered
Nov 20, 2001
Domain
cox.com
Website
www.cox.com/peering
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed