AS50833 — FIBERTEL-AS FIBER TELECOM s.r.o.

Network type: residential

AS50833 announces 6 IPv4 prefixes covering 9,216 addresses and 1 IPv6 prefixes.

About this network

FIBERTEL-AS is operated by Fiber Telecom s.r.o.

What it's used for

• The address space carries residential and business fiber access traffic, evidenced by reverse DNS records pointing to fibtel.net and netnames like CZ-FIBERTELECOM-19970610.
• The AS announces 8704 IPv4 addresses across 5 prefixes and 4 IPv6 prefixes, with only 4 observed routing neighbours, indicating a local access provider rather than a transit hub.
• Traffic consists of end-user internet access for customers in the Czech Republic, utilizing the company's fiber-optic infrastructure.

Notable

• All registrants for the announced prefixes are listed as FIBER TELECOM s.r.o., with Michal Krajcirovic identified as the contact for abuse and technical roles.
• The address inventory includes blocks allocated as early as 1997, reflecting the long-standing history of the operator in the Czech telecommunications market.

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

Announced prefixes

• 45.159.110.0/23
• 91.224.59.0/24
• 146.255.24.0/21
• 185.159.89.0/24
• 193.150.128.0/20
• 193.150.144.0/21
• 2a10:24c0::/29

Upstream networks

• AS53356 Free Range Cloud Hosting Inc.
• AS26431 Happy Telecommunications LLC
• AS35661 VIRTUA SYSTEMS SAS
• AS8772 Netassist International EOOD
• AS6939 Hurricane Electric LLC
• AS29632 Netassist International EOOD
• AS24482 SG.GS
• AS29504 Freenet Liberec, z.s.
• AS33891 Core-Backbone GmbH
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS8218 Zayo Infrastructure France SA
• AS210464 ANDREW KRISTULI

Adjacent networks

• AS53356 Free Range Cloud Hosting Inc.
• AS26431 Happy Telecommunications LLC
• AS35661 VIRTUA SYSTEMS SAS
• AS8772 Netassist International EOOD
• AS6939 Hurricane Electric LLC
• AS29632 Netassist International EOOD
• AS29504 Freenet Liberec, z.s.
• AS24482 SG.GS
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS8218 Zayo Infrastructure France SA
• AS33891 Core-Backbone GmbH
• AS210464 ANDREW KRISTULI

Routing security

• RPKI: 16 valid, 0 invalid and 0 not-found announcements; 17 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3,387 route objects.
• Listed in as-sets: AS-FIBERTELECOM, AS-FRC-AMS, AS-GRIDLANE, AS-HAPPYPEERING, AS-HURRICANEV6, AS-KAORA, AS-KAORA-PEERING, AS-KAORA-TRANSIT, AS-MELBICOM, AS-MELBICOM, AS-NETASSIST, AS-NIXCZ-RSCLIENTS, AS-RETN-ACTUAL-V6, AS-UKRAINE, AS210464:AS-DOWNSTREAMS, AS210464:AS-DOWNSTREAMS, AS35661:AS-FRA01DE, AS42000:AS-CUSTOMERS, AS50833:AS-FIBERTELECOM.

Internet exchanges

• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic