Autonomous system
AS44002 SYS-DATACOM Czech Republic
Residential RIPE Cable/DSL/ISP
Summary
Sys-DataCom
residential isp czech cable
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.czand185-4-201-255-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 (
79.98.72.0/21and185.4.200.0/22) 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. 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 |
|---|---|---|
| Peering.cz | Prague, Czech Republic | 185.0.20.70 |
Transit providers
9 upstream, 0 downstream and 16 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 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 3.07K addresses IPv6 141 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 143 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS44002- Registry name
- SYS-DATACOM
- Registrant
- MNT-SYSDATACOM
- Abuse contact
- ripe-abuse@sys-data.com
- Registered
- 2007-11-01
- Last changed
- 2018-09-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Sys-DataCom s.r.o.
- Also known as
- SYSDATA, Sys-DataCom, Brouzdej.net, Dataconnect, CzechData
- Network type
- Cable/DSL/ISP
- Scope
- Europe
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS44002- Present at
- 1 exchanges
- Facilities
- 2 facilities
- Website
- http://www.sys-data.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 47 valid, 0 with no ROA
- ROAs
- 32 authorising AS44002
- ASPA
- no ASPA record
- IRR
- 100% registered · 47 of 47 announcements
- Route objects
- 60 naming AS44002
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: 447 networks and 1,852 prefixes, as published 2026-10-27. 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