Autonomous system
AS50833 FIBERTEL-AS # upstreams
Residential RIPE
Summary
Fiber Telecom
isp residential czechia fiber
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.netand netnames likeCZ-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., withMichal Krajcirovicidentified 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| NIX.CZ - Neutral Internet eXchange for the Czech Republic | Prague, Czech Republic | 91.210.16.32 |
Transit providers
11 upstream, 0 downstream and 15 adjacent networks observed; most-used upstreams first.
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
IPv4 6 prefixes · 9.22K addresses IPv6 49 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 55 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS50833- Registry name
- FIBERTEL-AS
- Registrant
- MNT-KRAJA
- Abuse contact
- abuse@fibertelecom.cz
- Registered
- 2011-02-03
- Last changed
- 2026-10-09
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 15 valid, 0 with no ROA
- ROAs
- 17 authorising AS50833
- ASPA
- no ASPA record
- IRR
- 100% registered · 15 of 15 announcements
- Route objects
- 3,387 naming AS50833
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 436 networks and 1,771 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