LAYER3 INTEL
Get started
Sign in
Data as of Nov 5, 2026

51.19.136.0/21

Anonymizer · ISP proxy

RCN · space held by Sky UK Limited

Announcement
this exact prefix
RPKI valid
Announced by
AS6079
Type
ISP proxy
Risk
90 / 100 · Critical
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 51.19.136.0/21/24s
IPXO
2,048100%
8
Leased from

Owners leasing their own space

NameIn 51.19.136.0/21/24s
Sky UK Limited
2,048100%
8

Lineage

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

51.19.136.0/21

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– today
    Announced
    AS22773 Cox Communications Inc.
    as part of 51.19.128.0/17
    51.19.128.0/17
  3. Sep 4, 2026– today
    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