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Data as of Nov 9, 2026

109.121.143.0/24

1 residential-proxy exit · 30 days

NBI Systems Ltd. · space held by Optical Structural Network Ltd.

Announcement
this exact prefix
RPKI valid
Announced by
AS39396
Type
Residential
Risk
0 / 100 · Low

Residential-proxy exits

Proxy exits
1
0.39% of its addresses · 30 days
Providers
3
selling exits here
Oct 10, 2026 – Nov 8, 2026

Exits seen per day

27 observations

Proxy providers listing exits

  • FastProxy
  • LemonBright
  • ThunderProxy

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
109.121.136.0 - 109.121.191.25514,336BG-OPTICAL-20090924Optical Structural Network Ltd. (ORG-OSNL4-RIPE) · BGALLOCATED PANov 9, 2022abuselyulinnet@gmail.com
└ 109.121.142.0/23512BG-NBISNbis Ltd.ASSIGNED PAApr 2, 2022abuselyulinnet@gmail.com
via BG-OPTICAL-20090924

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
Optical Structural Network Ltd.
Handle
ORG-OSNL4-RIPE
Range
109.121.136.0 - 109.121.191.255
Registration type
ALLOCATED PA
Record created
Nov 9, 2022
Origin network

AS39396

BG
Name
NBI Systems Ltd.
Type
Internet provider
Registered
Feb 14, 2006
Domain
nbis.bg
Website
www.nbis.bg/
Industry
Computer and Information Technology
Spamhaus ASN-DROP
not listed