AS197889 — MICROSYSTEM Microsystem-Kecskemet Kft

Network type: residential

AS197889 announces 14 IPv4 prefixes covering 8,448 addresses and 2 IPv6 prefixes.

About this network

The AS handle MICROSYSTEM is held by Microsystem-Kecskemet Kft.

What it's used for

• The address space carries residential and business internet access, evidenced by reverse DNS entries such as public-f254.borsodweb.hu, public-j000.borsodweb.hu, and sn3-254.boglarnet.hu, alongside internal infrastructure names like rev.77-221-34-254.microsystem.hu.
• The AS announces 8448 IPv4 addresses across 14 prefixes and 2 IPv6 prefixes, with 17 observed neighbours; this ratio of address space to peering partners indicates an access network rather than a transit provider.
• Traffic from this AS consists of subscriber eyeballs for cable and DSL customers in Hungary, as identified by PeeringDB classifying the operator as a Cable/DSL/ISP.

Notable

• Registrants include Microsystem-Kecskemet Kft, which matches the AS holder, as well as third parties including BorsodWeb Internet Szolgaltato Kft., VIACOMKFT ROLE, and ONS-HU; Optimum Networks Kft, suggesting the AS aggregates space for multiple regional providers or subsidiaries.
• The inventory includes a mix of /22 and /24 blocks, with some prefixes registered to different entities such as BorsodWeb and Optimum Networks, indicating a consolidated routing space for a group of related Hungarian ISPs.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 77.221.32.0/22
• 77.221.43.0/24
• 77.221.44.0/22
• 77.221.52.0/23
• 77.221.57.0/24
• 77.221.58.0/23
• 77.221.60.0/23
• 77.221.62.0/24
• 85.119.8.0/21
• 89.107.254.0/24
• 185.223.16.0/22
• 193.110.83.0/24
• 193.111.224.0/24
• 195.184.4.0/24
• 2a10:4940::/32
• 2a11:440::/32

Upstream networks

• AS41206 United Telecom Zartkoruen Mukodo Reszvenytarsasag
• AS12301 One Hungary Ltd.
• AS6939 Hurricane Electric LLC
• AS215366 Gabor Birincsik
• AS29657 Last-Mile Ltd.
• AS39679 JZT Informatikai Kft.
• AS8447 A1 Telekom Austria AG
• AS33891 Core-Backbone GmbH

Downstream networks

• AS211326 Incom Technologies Kft.
• AS207349 Opennetworks Kft.
• AS15985 Pipenet Informatics and Securities Bt.

Adjacent networks

• AS41206 United Telecom Zartkoruen Mukodo Reszvenytarsasag
• AS12301 One Hungary Ltd.
• AS6939 Hurricane Electric LLC
• AS211326 Incom Technologies Kft.
• AS215366 Gabor Birincsik
• AS207349 Opennetworks Kft.
• AS29657 Last-Mile Ltd.
• AS39679 JZT Informatikai Kft.
• AS8447 A1 Telekom Austria AG
• AS33891 Core-Backbone GmbH
• AS15985 Pipenet Informatics and Securities Bt.

Routing security

• RPKI: 19 valid, 0 invalid and 0 not-found announcements; 31 ROAs.
• ASPA: none published.
• IRR: 95% of announcements registered; 27 route objects.
• Listed in as-sets: AS-BIX, AS-BIX-V6, AS-JZT, AS-MAGYARTELEKOM, AS-MAGYARTELEKOM-HU, AS-MICROSYSTEM, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS210788:AS-CLIST.

Internet exchanges

• Budapest Internet Exchange — Budapest, Hungary