asn.dev

Autonomous system

AS56937 ISDD-AS

Unclassified RIPE

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

Summary

ISDD plus s.r.o.

Slovakia · AI-generated

business software slovakia

The AS handle ISDD-AS is held by ISDD plus s.r.o.

What it's used for

  • The space carries the netname SK-ISDD-PI, registered to BENESTRA RIPE ADMINISTRATOR and ISDD plus s.r.o.
  • The inventory consists of 256 IPv4 addresses within a single prefix, 91.233.248.0/24, with 1 observed neighbour
  • This ratio indicates a small, self-contained corporate network rather than a transit or access provider

Notable

  • The registrant ISDD plus s.r.o. matches the AS holder, while the netname registrant BENESTRA RIPE ADMINISTRATOR suggests a specific administrative or hosting arrangement for the IP block
  • The address inventory is a single /24 block, indicating a compact and unified corporate estate

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
AS5578SWAN, a.s.59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, 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
SKSlovakia1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS56937
Registry name
ISDD-AS
Registrant
GTSSK-MNT
Abuse contact
admin@isdd.sk
Registered
2011-06-17
Last changed
2019-05-10
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS56937
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS56937

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 1,773 prefixes, as published 2026-10-13. 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