asn.dev

Autonomous system

AS49305 ALSYCON-BV

Unclassified RIPE

IPv4 addresses 1.02K 4 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly NL
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Alsycon B.V.

Netherlands · AI-generated

isp datacenter netherlands

ALSYCON-BV is operated by Alsycon B.V.

What it's used for

  • The address space carries infrastructure for a Dutch datacenter and multi-service ISP, with netnames such as NL-ALSYCON-20211011 and NL-ALSYCON-20201218 registered to Alsycon B.V.
  • The AS announces 1024 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with a single observed neighbour, indicating a small-scale access or hosting network rather than a transit provider.
  • Traffic from this AS consists of datacenter services and ISP offerings provided by Alsycon B.V., located near Amsterdam.

Notable

  • All registrants for the announced prefixes are Alsycon B.V., matching the AS holder.
  • The address inventory consists of four /24 IPv4 blocks and one IPv6 /29, all registered to the same entity.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS49870Alsycon B.V.269

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 4 prefixes · 1.02K addresses IPv6 1 prefixes

CountryNamePrefixes
NLNetherlands5

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS49305
Registry name
ALSYCON-BV
Registrant
Alsycon-BV
Abuse contact
abuse@as49870.net
Registered
2022-03-14
Last changed
2022-03-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 5 valid, 0 with no ROA
ROAs
5 authorising AS49305
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
5 naming AS49305

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 1,771 prefixes, as published 2026-10-15. 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