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Data as of Nov 3, 2026

149.51.0.0/21

Anonymizer · ISP proxy

Deutsche Telekom AG · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS3320
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Jan 28, 1992
2 · Leased from
Rackdog
for its owner Cogent Communications, LLC
3 · Announced by
AS3320 Deutsche Telekom AG
since Jan 2025 · 21 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 149.51.0.0/21/24s
Rackdog
2,048100%
8
Leased from

Owners leasing their own space

NameIn 149.51.0.0/21/24s
Cogent Communications, LLC
2,048100%
8

Lineage

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

149.51.0.0/21

From the registry to its use

  1. Jan 28, 1992
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    149.51.0.0/16
  2. Sep 15, 2006– Nov 2, 2026
    Announced
    AS174 Cogent Communications, LLC
    as part of 149.50.0.0/15
    149.50.0.0/15
  3. May 28, 2022– Aug 7, 2022
    Announced
    AS398465 Rackdog, LLC
    Hosting
  4. Aug 3, 2023– Feb 4, 2025
    Announced
    AS1273 Vodafone Global Network
    Internet provider
  5. Jan 24, 2025– Feb 4, 2025
    Announced
    AS398465 Rackdog, LLC
    Hosting
  6. Jan 24, 2025– Nov 2, 2026
    Announced
    AS3320 Deutsche Telekom AG
    Internet provider
  7. Feb 4, 2025
    Route object
    Rackdog
    RADB route object for AS3320 Deutsche Telekom AG, maintainer MAINT-AS398465
  8. May 27, 2026
    Assigned
    RCN
    Reassigned
    149.51.0.0/18
  9. today
    Leased from
    Rackdog
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsRPKI
149.50.0.0/15
since Sep 2006
AS174Internet providerIP broker Rackdog (part)3,385
978 always on

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
149.51.0.0/1665,536COGENT-149-51-16Cogent Communications, LLC (COGC) · USDirect AllocationJan 28, 1992[email protected]
└ 149.51.0.0/1816,384RACKDOG-CGNT-NET-10RCN (C11605108) · USReassignedMay 27, 2026[email protected]
via COGENT-149-51-16

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
149.51.0.0/16
Registration type
Direct Allocation
Record created
Jan 28, 1992
Legacy
yes
Origin network

AS3320

DE
Name
Deutsche Telekom AG
Type
Internet provider
Registered
Feb 23, 1995
Domain
telekom.de
Website
wholesale.telekom.com
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed