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Data as of Nov 9, 2026

51.19.128.0/21

Anonymizer · ISP proxy

RCN · space held by Sky UK Limited

Announcement
this exact prefix
RPKI valid
Announced by
AS6079
Type
ISP proxy
Recent change
New origin Sep 2026
its first announcement on record
IPv4 market

Path

Announced by AS6079 since Sep 2026 · 9 wk ago
1 · Holder
Sky UK Limited
record created Feb 5, 2026 · reallocated to a party the registry does not name Feb 5, 2026
2 · Leased from
IPXO
for its owner Sky UK Limited
3 · Announced by
AS6079 RCN
since Sep 2026 · 9 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 51.19.128.0/21/24s
IPXO
2,048100%
8
Leased from

Owners leasing their own space

NameIn 51.19.128.0/21/24s
Sky UK Limited
2,048100%
8

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

51.19.128.0/21

From the registry to its use

  1. Feb 5, 2026
    Registry record
    Sky UK Limited
    ALLOCATED PA
    51.19.0.0/16
  2. Jul 30, 2026– Nov 8, 2026
    Announced
    AS22773 Cox Communications Inc.
    as part of 51.19.128.0/17
    51.19.128.0/17
  3. Sep 4, 2026– Nov 8, 2026
    Announced
    AS6079 RCN
    Internet provider
  4. Sep 8, 2026
    Route object
    AS6079 RCN
    RADB route object for AS6079 RCN, maintainer MAINT-AS36236
  5. today
    Leased from
    IPXO
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromHolderRPKI
51.19.128.0/17
since Jul 2026
AS22773ISP proxyIP broker IPXOSky UK Limited

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
51.19.0.0/1665,536UK-SKY-19930901Sky UK Limited (ORG-SUL39-RIPE) · GBALLOCATED PAFeb 5, 2026hostmaster@sky.uk
└ 51.19.128.0/1732,768SKY-LEASED-IPXOunknownSUB-ALLOCATED PAFeb 5, 2026report@abuseradar.com

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
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
Not named in the registry
Reallocated range
51.19.128.0/17
Reallocation type
SUB-ALLOCATED PA
Reallocated
Feb 5, 2026
Origin network

AS6079

US
Name
RCN
Type
Internet provider
Registered
Apr 4, 2001
Domain
astound.com
Website
www.astound.com
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed