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Data as of Nov 11, 2026

154.28.136.0/23

Anonymizer · ISP proxy

Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS174
Type
ISP proxy
Risk
95 / 100 · Critical
Open proxy port
IPv4 market

Path

1 · Holder
Cogent Communications, LLC
record created Feb 5, 1992
2 · Leased from
not leased
3 · Announced by
AS174 Cogent Communications, LLC
since Jan 2024 · 2.8 yr ago
4 · Use
Proxy providersnamed QuarkIP
ISP proxy

Operators, sellers and brokers

Proxy providers

NameParentIn 154.28.136.0/23/24s
QuarkIP
512100%
2

Lineage

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

154.28.136.0/23

From the registry to its use

  1. Feb 5, 1992
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    154.28.0.0/16
  2. Sep 15, 2006– today
    Announced
    AS174 Cogent Communications, LLC
    as part of 154.24.0.0/13
    154.24.0.0/13
  3. Jan 18, 2024– today
    Announced
    AS174 Cogent Communications, LLC
    Internet provider
  4. today
    Used
    QuarkIP
    Proxy seller

Announcements

Less specific

Covering announcements

PrefixOriginTypeAnonymizer addressesOperatorLeased fromProxy exitsRPKI
154.24.0.0/13
since Sep 2006
AS174Internet provider12,0322.3%ISP proxyProxy providerssold by OxylabsIP broker Aventice (part), Rackdog (part)2,806
1,257 always on

Network & registry

AnnouncementRouting historyWhois & abuse
Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Stable
First seen
Jan 2024
Current origin since
Jan 2024 · 2.8 yr
Origin networks
1