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Data as of Nov 9, 2026

204.242.0.0/20

Anonymizer

RCN · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS6079
Type
ISP proxy
94% of it
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Dec 20, 1994
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS6079 RCN
since Mar 2022 · 4.6 yr ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 204.242.0.0/20/24s
Rackdog
4,096100%
16
Leased from

Owners leasing their own space

NameIn 204.242.0.0/20/24s
Cogent Communications, LLC
4,096100%
16

Lineage

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

204.242.0.0/20

From the registry to its use

  1. Dec 20, 1994
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    204.240.0.0/14
  2. May 9, 2005– Nov 8, 2026
    Announced
    AS174 Cogent Communications, LLC
    as part of 204.240.0.0/14
    204.240.0.0/14
  3. Mar 17, 2022– Nov 8, 2026
    Announced
    AS6079 RCN
    Internet provider
  4. Mar 18, 2022
    Route object
    AS6079 RCN
    RADB route object for AS6079 RCN, maintainer MAINT-AS6079
  5. May 27, 2026
    Assigned
    RCN
    Reassigned
    204.242.0.0/16
  6. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
204.240.0.0/14
since May 2005
AS174Internet providerCogent Communications, LLC
More specific

Announcements inside

PrefixOriginTypeLeased fromHolderRPKI
204.242.1.0/24
since Aug 2025
AS6079ISP proxyIP broker RackdogCogent Communications, LLC
204.242.7.0/24
since Mar 2026
AS398465Datacenter proxyIP broker RackdogCogent Communications, 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
204.240.0.0/14262,144COGENT-204-240-14Cogent Communications, LLC (COGC) · USDirect AllocationDec 20, 1994abuse@cogentco.com
└ 204.242.0.0/1665,536RACKDOG-CGNT-NET-33RCN (C11605228) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-204-240-14

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

4,096 addresses
TypeAddressesShareRanges
ISP proxyanonymizer3,84094%4
Datacenter proxyanonymizer2566.3%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
Cogent Communications, LLC
Handle
COGC
Range
204.240.0.0/14
Registration type
Direct Allocation
Record created
Dec 20, 1994
Legacy
yes
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