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Data as of Nov 9, 2026

206.231.224.0/20

Anonymizer · ISP proxy

GTT Communications Inc. · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS3257
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Nov 6, 1995 · reallocated to I-2000, Inc. Jan 29, 1996
2 · Leased from
Cogent Communications, LLC
its owner, directly
3 · Announced by
AS3257 GTT Communications Inc.
since Nov 2019 · 7.0 yr ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

Owners leasing their own space

NameIn 206.231.224.0/20/24s
Cogent Communications, LLC
4,096100%
16

Lineage

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

206.231.224.0/20

From the registry to its use

  1. Nov 6, 1995
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    206.228.0.0/14
  2. Jan 29, 1996
    Reallocated
    I-2000, Inc.
    Reallocated
    206.231.224.0/20
  3. May 9, 2005– May 16, 2024
    Announced
    AS1239 Cogent Communications, LLC
    as part of 206.228.0.0/14
    206.228.0.0/14
  4. May 9, 2005– Nov 27, 2019
    Announced
    AS6459 I-2000, Inc.
  5. Sep 14, 2007
    Route object
    AS26195 Cyberri Technologies Inc.
    RADB route object for AS26195 Cyberri Technologies Inc., maintainer MAINT-AS7029
    206.231.227.0/24
  6. Oct 17, 2018
    Route object
    AS20077 IPNetZone
    RADB route object for AS20077 IPNetZone, maintainer MAINT-RR
    206.231.226.0/24
  7. Oct 17, 2018
    Route object
    AS20077 IPNetZone
    RADB route object for AS20077 IPNetZone, maintainer MAINT-RR
    206.231.230.0/24
  8. Nov 14, 2019
    Route object
    AS3257 GTT Communications Inc.
    RADB route object for AS3257 GTT Communications Inc., maintainer MAINT-AS3257
  9. Nov 16, 2019– Nov 8, 2026
    Announced
    AS3257 GTT Communications Inc.
    Internet provider
  10. May 5, 2024– Nov 8, 2026
    Announced
    AS174 Cogent Communications, LLC
    as part of 206.228.0.0/14
    206.228.0.0/14

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesProxy exitsHolderRPKI
206.228.0.0/14
since May 2024
AS174Internet provider16,3846.3%ISP proxy15
4 always on
Cogent 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
206.228.0.0/14262,144COGENT-206-228-0Cogent Communications, LLC (COGC) · USDirect AllocationNov 6, 1995abuse@cogentco.com
└ 206.231.224.0/204,096SPRINT-CEE7EFI-2000, Inc. (I2I) · USReallocatedJan 29, 1996abuse@gtt.net
└ 206.231.224.0/24256I2000-NET8I-2000, Inc (C00007803) · USReassignedFeb 9, 1996abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.225.0/24256WHAFHWolf Haldenstein (WOLFHA) · USReassignedJan 31, 1996—
└ 206.231.226.0/24256VP-TB-NETVoicepulse Inc. (C00007802) · USReassignedJan 31, 1996abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.227.0/24256100000DCH Management Services (C02947996) · USReassignedMar 20, 2012abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.228.0/24256ECRIProgressive Development, Inc (C00007804) · USReassignedFeb 12, 1996abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.229.0/24256MCOMPMichael Minichino (C00007810) · USReassignedFeb 18, 1996abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.230.0/24256VP-TB-NETVoicepulse Inc. (C02041271) · USReassignedSep 12, 2008abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.231.0/24256CHEMSYSTEMS-NET1Chem Systems, Inc. (C00007855) · USReassignedApr 16, 1996abuse@gtt.net
via SPRINT-CEE7EF
└ 206.231.238.0/24256I-2000-PTPI-2000, Inc (C00007819) · USReassignedMar 7, 1996abuse@gtt.net
via SPRINT-CEE7EF

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
Cogent Communications, LLC
Handle
COGC
Range
206.228.0.0/14
Registration type
Direct Allocation
Record created
Nov 6, 1995
Legacy
yes
Reallocated to
I-2000, Inc. (I2I)
Reallocated range
206.231.224.0/20
Reallocated
Jan 29, 1996
Origin network

AS3257

US
Name
GTT Communications Inc.
Type
Internet provider
Registered
Sep 30, 1994
Domain
gtt.net
Website
www.gtt.net
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
244