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Data as of Nov 3, 2026

91.124.72.0/22

Anonymizer · ISP proxy

Cogent Communications, LLC · space held by JSC "Ukrtelecom"

Announcement
this exact prefix
RPKI valid
Announced by
AS174
Type
ISP proxy
Risk
90 / 100 · Critical
IPv4 market

Path

1 · Holder
JSC "Ukrtelecom"
record created Oct 6, 2006
2 · Leased from
IPXO
for its owner JSC "Ukrtelecom"
3 · Announced by
AS174 Cogent Communications, LLC
since Mar 2024 · 2.6 yr ago
4 · Use
ISP proxy
anonymizer space, operator not named

Operators, sellers and brokers

Leased from

IP brokers

NameIn 91.124.72.0/22/24s
IPXO
1,024100%
4
Leased from

Owners leasing their own space

NameIn 91.124.72.0/22/24s
JSC "Ukrtelecom"
1,024100%
4

Lineage

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

91.124.72.0/22

From the registry to its use

  1. Oct 6, 2006
    Registry record
    JSC "Ukrtelecom"
    ALLOCATED PA
    91.124.0.0/16
  2. Jan 12, 2024
    Reallocated
    JSC "Ukrtelecom"
    SUB-ALLOCATED PA
    91.124.0.0/17
  3. Mar 18, 2024– Nov 2, 2026
    Announced
    AS174 Cogent Communications, LLC
    Internet provider
  4. Mar 20, 2024
    Route object
    IPXO
    RIPE route object for AS174 Cogent Communications, LLC, maintainer NETUTILS-MNT
  5. Oct 28, 2026
    Route object
    IPXO
    RIPE route object for AS213784 Tngnet B.V., maintainer NETUTILS-MNT
  6. Oct 29, 2026
    Route object
    IPXO
    RADB route object for AS213784 Tngnet B.V., maintainer MAINT-AS834
  7. today
    Leased from
    IPXO
    IP broker

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
91.124.0.0/1665,536UA-UKRTELECOM-20061006JSC "Ukrtelecom" (ORG-USTC1-RIPE) · UAALLOCATED PAOct 6, 2006[email protected]
└ 91.124.0.0/1732,768IPXO-91-124-0JSC "Ukrtelecom" (ORG-USTC1-RIPE) · UASUB-ALLOCATED PAJan 12, 2024[email protected]
└ 91.124.72.0/221,024NET-91-124-72-0-22unknownASSIGNED PANov 9, 2025[email protected]

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
JSC "Ukrtelecom"
Handle
ORG-USTC1-RIPE
Range
91.124.0.0/16
Registration type
ALLOCATED PA
Record created
Oct 6, 2006
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