AS44002 — SYS-DATACOM Sys-DataCom s.r.o.

Network type: residential

AS44002 announces 2 IPv4 prefixes covering 3,072 addresses and 1 IPv6 prefixes.

About this network

The AS handle SYS-DATACOM is held by Sys-DataCom s.r.o.

What it's used for

• The address space carries residential broadband traffic, evidenced by reverse DNS entries such as dtco-revnice.czechdata.cz and 185-4-201-255-CGNAT.sys-data.com, which indicate DSL/Cable access and CGNAT usage.
• The network announces 3072 IPv4 addresses across 2 prefixes and 141 IPv6 prefixes, with 31 observed neighbours, a ratio consistent with an access/eyeball network rather than a transit provider.
• Traffic from this AS consists of subscriber eyeballs for residential internet access, including web browsing, VoIP, and general consumer internet services.

Notable

• Registrants for both announced IPv4 prefixes (79.98.72.0/21 and 185.4.200.0/22) are listed as Sys-DataCom s.r.o. and Sys-Datacom skupina, aligning with the AS holder.
• The address inventory is finely subdivided in IPv6 with 141 prefixes, suggesting site-by-site or customer-segmented allocation typical of a regional ISP.

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

Announced prefixes

• 79.98.72.0/21
• 185.4.200.0/22
• 2a02:970::/32

Upstream networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS47232 ISP Alliance a.s.
• AS24482 SG.GS
• AS29504 Freenet Liberec, z.s.
• AS37721 Virtual Technologies & Solutions
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS20562 Broadband Hosting B.V.
• AS44066 firstcolo GmbH

Adjacent networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS47232 ISP Alliance a.s.
• AS24482 SG.GS
• AS29504 Freenet Liberec, z.s.
• AS37721 Virtual Technologies & Solutions
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS20562 Broadband Hosting B.V.
• AS44066 firstcolo GmbH

Routing security

• RPKI: 47 valid, 0 invalid and 0 not-found announcements; 32 ROAs.
• ASPA: none published.
• IRR: 96% of announcements registered; 60 route objects.
• Listed in as-sets: AS-GRAPESC-CZ, AS-HURRICANEV6, AS-ISPALLIANCE-CZ, AS-PEERINGCZ-RS, AS-SUPERNETWORK, AS-SYSDATACOM-CZ, AS-TRANSCZ, AS1299:AS-TWELVE99-EU-V4, AS1299:AS-TWELVE99-EU-V6.

Internet exchanges

• Peering.cz — Prague, Czech Republic