asn.dev

Autonomous system

AS35328 DSIDATA DSI DATA flexi

Residential RIPE

IPv4 addresses 24.58K 7 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly SK
Exchanges 3 recorded by PCH
Upstreams 9 3 downstream
Flagged prefixes 0 none

Summary

DSI DATA

Slovakia · AI-generated

isp residential cable dsl

DSIDATA is the AS handle for DSI DATA, a. s., a Slovakian internet service provider operating under the brand name flexi.

What it's used for

  • The address space carries residential customer traffic, evidenced by reverse DNS entries like 1009.000.cus.dsidata.sk and 1105.000.cus.dsidata.sk which indicate customer-facing infrastructure.
  • With 24,576 IPv4 addresses announced across 7 prefixes and 38 observed neighbours, the ratio suggests a regional access network providing connectivity to end-users rather than a transit provider.

Notable

  • Registrants for the majority of prefixes are consistent with the announcer, listing DSI DATA, a. s. and DSi DATA Hostmaster Contacts.
  • One prefix, 31.130.160.0/22, has a netname of NELSON-NET and a registrant of Nelson Services, s.r.o., indicating a distinct entity or leased space within the AS.
  • The inventory includes a mix of prefixes with netnames like SK-DSIDATA-20070112 and SK-DSIDATA-20050523, reflecting a long-standing allocation history in Slovakia.

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

Recorded at 3 exchanges in 2 countries, largest first.

ExchangeLocationTheir address
Peering.czPrague, Czech Republic185.0.20.225
NIX.CZ - Neutral Internet eXchange for the Czech RepublicPrague, Czech Republic91.210.17.126
Slovak Internet eXchange BratislavaBratislava, Slovakia192.108.148.80

Transit providers

9 upstream, 3 downstream and 18 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS31117ENERGOTEL a.s.309
AS6939Hurricane Electric LLC94
AS3303Swisscom (Schweiz) AG14
AS24482SG.GS8
AS29504Freenet Liberec, z.s.8
AS20562Broadband Hosting B.V.7
AS31230Slovak University of Technology in Bratislava7
AS37721Virtual Technologies & Solutions7

All 9 upstreams →

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 7 prefixes · 24.58K addresses IPv6 1 prefixes

CountryNamePrefixes
SKSlovakia8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS35328
Registry name
DSIDATA
Registrant
DSIDATA-MNT
Abuse contact
abuse@dsidata.sk
Registered
2005-07-15
Last changed
2026-02-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 8 valid, 0 with no ROA
ROAs
20 authorising AS35328
ASPA
2 declared providers
IRR
100% registered · 8 of 8 announcements
Route objects
8 naming AS35328

Reputation

Classification and threat

Residential Fixed-line consumer ISP. Addresses here are homes.

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 1,784 prefixes, as published 2026-10-19. 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