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Data as of Nov 3, 2026

100.42.16.0/23

Anonymizer · ISP proxy

Comcast Cable Communications, LLC · space held by Fork Networking, LLC

Announcement
this exact prefix
RPKI valid
Announced by
AS33651
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Sep 28, 2026
from AS46841 Fork Networking, LLC, after 8.3 years unannounced
registry: reallocated to SkyQuantum Internet Service by Fork Networking, LLC, Sep 7, 2026
IPv4 market

Path

Announced by AS33651 since Sep 28, 2026 · 5 wk ago
1 · Holder
Fork Networking, LLC
record created Nov 17, 2011 · reallocated to SkyQuantum Internet Service Sep 7, 2026
2 · Leased from
Interworks Networking Services
its owner, directly
3 · Announced by
AS33651 Comcast Cable Communications, LLC
since Sep 28, 2026 · 5 wk ago
4 · Use
Proxy providersnamed SkyQuantum
ISP proxy

Operators, sellers and brokers

Proxy providers

NameParentIn 100.42.16.0/23/24s
SkyQuantum
512100%
2
Leased from

Owners leasing their own space

NameIn 100.42.16.0/23/24s
Interworks Networking Services
512100%
2

Lineage

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

100.42.16.0/23

From the registry to its use

  1. Nov 17, 2011
    Registry record
    Fork Networking, LLC
    Direct Allocation
    100.42.16.0/20
  2. Nov 22, 2011– Jun 27, 2016
    Announced
    AS46841 Fork Networking, LLC
    as part of 100.42.16.0/20
    100.42.16.0/20
  3. Aug 15, 2016– Jun 5, 2018
    Announced
    AS46841 Fork Networking, LLC
    Hosting
  4. Feb 28, 2023– Nov 2, 2026
    Announced
    AS46841 Fork Networking, LLC
    as part of 100.42.16.0/20
    100.42.16.0/20
  5. Sep 3, 2026
    Route object
    AS33651 Comcast Cable Communications, LLC
    ARIN route object for AS33651 Comcast Cable Communications, LLC, maintainer MNT-FORKN
  6. Sep 3, 2026
    Route object
    AS33667 Comcast Cable Communications, LLC
    ARIN route object for AS33667 Comcast Cable Communications, LLC, maintainer MNT-FORKN
  7. Sep 7, 2026
    Reallocated
    SkyQuantum Internet Service
    Reallocated
    100.42.16.0/23
  8. Sep 28, 2026– Nov 2, 2026
    Announced
    AS33651 Comcast Cable Communications, LLC
    Internet provider
  9. Oct 9, 2026
    Route object
    AS33651 Comcast Cable Communications, LLC
    RADB route object for AS33651 Comcast Cable Communications, LLC, maintainer MAINT-AS55201
    100.42.16.0/24
  10. Oct 9, 2026
    Route object
    AS33651 Comcast Cable Communications, LLC
    RADB route object for AS33651 Comcast Cable Communications, LLC, maintainer MAINT-AS55201
    100.42.17.0/24
  11. today
    Used
    SkyQuantum
    Proxy seller

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
100.42.16.0/20
since Feb 2023
AS46841Hosting13Fork Networking, LLC

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
100.42.16.0/204,096FORK-NETWORKINGFork Networking, LLC (FORKN) · USDirect AllocationNov 17, 2011[email protected]
└ 100.42.16.0/23512SISL-43SkyQuantum Internet Service (SISL-43) · USReallocatedSep 7, 2026[email protected]
└ 100.42.16.0/24256NET-100-42-16-0Comcast Cable Communications, LLC (C11731240) · USReassignedOct 7, 2026[email protected]
via SISL-43
└ 100.42.17.0/24256NET-100-42-17-0Comcast Cable Communications, LLC (C11731245) · USReassignedOct 7, 2026[email protected]
via SISL-43

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

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
Fork Networking, LLC
Handle
FORKN
Range
100.42.16.0/20
Registration type
Direct Allocation
Record created
Nov 17, 2011
Reallocated to
SkyQuantum Internet Service (SISL-43)
Reallocated range
100.42.16.0/23
Reallocated
Sep 7, 2026
Origin network

AS33651

US
Name
Comcast Cable Communications, LLC
Type
Internet provider
Registered
Feb 16, 2005
Domain
comcast.com
Website
corporate.comcast.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed