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Data as of Nov 15, 2026

205.241.240.0/20

Anonymizer · ISP proxy

Telstra Global · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS4637
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Apr 24, 1995
2 · Leased from
Cogent Communications, LLC
its owner, directly
3 · Announced by
AS4637 Telstra Global
since Dec 2025 · 11 mo ago
4 · Use
Proxy providersnamed Bright Data
ISP proxy

Operators, sellers and brokers

Proxy providers

NameParentIn 205.241.240.0/20/24s
Bright Data
4,096100%
16
Leased from

Owners leasing their own space

NameIn 205.241.240.0/20/24s
Cogent Communications, LLC
4,096100%
16

Lineage

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

205.241.240.0/20

From the registry to its use

  1. Apr 24, 1995
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    205.240.0.0/13
  2. Aug 16, 2025– Dec 13, 2025
    Announced
    AS6079 RCN
    Internet provider
  3. Aug 26, 2025
    Route object
    Rackdog
    RADB route object for AS6079 RCN, maintainer MAINT-AS398465
  4. Dec 8, 2025
    Route object
    AS4637 Telstra Global
    ARIN route object for AS4637 Telstra Global, maintainer MNT-COGC
  5. Dec 14, 2025– today
    Announced
    AS4637 Telstra Global
    Internet provider
  6. May 27, 2026
    Assigned
    RCN
    Reassigned
    205.241.128.0/17
  7. Sep 18, 2026– today
    Announced
    AS174 Cogent Communications, LLC
    as part of 205.240.0.0/13
    205.240.0.0/13
  8. today
    Leased from
    Rackdog
    IP broker
  9. today
    Used
    Bright Data
    Proxy seller

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsHolderRPKI
205.240.0.0/13AS174Internet providerIP broker Rackdog (part)34
2 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
205.240.0.0/13524,288COGENT-205-240-0Cogent Communications, LLC (COGC) · USDirect AllocationApr 24, 1995abuse@cogentco.com
└ 205.241.128.0/1732,768RACKDOG-CGNT-NET-39RCN (C11605234) · USReassignedMay 27, 2026abuse@cogentco.com
via COGENT-205-240-0

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
Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Rotating
First seen
Aug 2025
Current origin since
Dec 2025 · 11 mo
Origin networks
2
Last change of origin
Dec 2025
Recorded history

History

Handoffs
1