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Data as of Nov 9, 2026

144.224.0.0/16

49,152 anonymizer addresses · 75% · ISP proxy

Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS174
Type
ISP proxy
75% of it
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Jan 11, 1991
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS174 Cogent Communications, LLC
since May 2024 · 2.5 yr ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 144.224.0.0/16/24s
Rackdog
49,15275%
192
Leased from

Owners leasing their own space

NameIn 144.224.0.0/16/24s
Cogent Communications, LLC
16,38425%
64

Lineage

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

144.224.0.0/16

From the registry to its use

  1. Jan 11, 1991
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    144.224.0.0/16
  2. May 9, 2005– May 16, 2024
    Announced
    AS1239 Cogent Communications, LLC
  3. May 11, 2021
    Route object
    AS1239 Cogent Communications, LLC
    ARIN route object for AS1239 Cogent Communications, LLC, maintainer MNT-COGC
  4. Jun 6, 2023
    Route object
    AS174 Cogent Communications, LLC
    ARIN route object for AS174 Cogent Communications, LLC, maintainer MNT-COGC
  5. May 5, 2024– Nov 8, 2026
    Announced
    AS174 Cogent Communications, LLC
    Internet provider
  6. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.128.0/20
  7. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.144.0/20
  8. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.160.0/20
  9. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.176.0/20
  10. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.192.0/20
  11. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.208.0/20
  12. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.224.0/20
  13. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS11404 Wave Broadband, maintainer MAINT-AS398465
    144.224.240.0/20
  14. May 22, 2026
    Route object
    AS20115 Charter Communications LLC
    RADB route object for AS20115 Charter Communications LLC, maintainer MAINT-CHTR-WD
    144.224.128.0/19
  15. May 22, 2026
    Route object
    AS20115 Charter Communications LLC
    RADB route object for AS20115 Charter Communications LLC, maintainer MAINT-CHTR-WD
    144.224.160.0/19
  16. May 22, 2026
    Route object
    AS20115 Charter Communications LLC
    RADB route object for AS20115 Charter Communications LLC, maintainer MAINT-CHTR-WD
    144.224.192.0/19
  17. May 22, 2026
    Route object
    AS20115 Charter Communications LLC
    RADB route object for AS20115 Charter Communications LLC, maintainer MAINT-CHTR-WD
    144.224.224.0/19
  18. Sep 29, 2026
    Route object
    Rackdog
    RADB route object for AS22773 Cox Communications Inc., maintainer MAINT-AS398465
    144.224.128.0/17

Announcements

More specific

Announcements inside

PrefixOriginTypeLeased fromHolderRPKI
144.224.32.0/19
since Dec 2025
AS4637ISP proxyIP broker RackdogCogent Communications, LLC
144.224.64.0/19
since Dec 2025
AS4637ISP 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
144.224.0.0/1665,536COGENT-144-224-0Cogent Communications, LLC (COGC) · USDirect AllocationJan 11, 1991abuse@cogentco.com
└ 144.224.32.0/198,192RACKDOG-CGNT-NET-3RCN (C11605022) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-144-224-0
└ 144.224.64.0/198,192RACKDOG-CGNT-NET-4RCN (C11605023) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-144-224-0
└ 144.224.128.0/1732,768RACKDOG-CGNT-NET-2RCN (C11605021) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-144-224-0

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

65,536 addresses
TypeAddressesShareRanges
ISP proxyanonymizer49,15275%3
Internet provider16,38425%2

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS174

US
Name
Cogent Communications, LLC
Type
Internet provider
Registered
May 16, 1996
Domain
cogentco.com
Website
www.cogentco.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
1,658