asn.dev

Autonomous system

AS51739 ISYATIRIM-MD

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly TR
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Is Yatirim Menkul Degerler A.S.

Turkey · AI-generated

business finance corporate

The AS handle ISYATIRIM-MD is held by Is Yatirim Menkul Degerler A.S.

What it's used for

  • The address space carries corporate network traffic, identified by the netname IsYatirim-net and registrant ISNET ROLE; Is Yatirim Menkul Degerler A.S.
  • The inventory consists of 256 IPv4 addresses in a single prefix (91.223.0.0/24) with 1 observed neighbour, indicating a small, self-contained corporate estate rather than a transit or access network
  • Traffic from this AS represents internal operations for a Turkish brokerage house and investment banking division, including office workers, web/API endpoints, and internal systems supporting capital market services

Notable

  • Registrants align with the announcer, listing ISNET ROLE; Is Yatirim Menkul Degerler A.S. for the sole prefix
  • The address inventory is a single /24 block, consistent with a standard corporate allocation for a mid-sized financial institution

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9021Is Net Elektonik Bilgi Uretim Dagitim Ticaret ve Iletisim Hizmetleri A.S.59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-23, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
TRTurkey1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS51739
Registry name
ISYATIRIM-MD
Registrant
IS_NET-MNT
Abuse contact
kgunal@isyatirim.com.tr
Registered
2010-10-28
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS51739
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS51739

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,779 prefixes, as published 2026-10-24. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check