Autonomous system
AS209531 OSTV OSTV s.r.o.
Residential RIPE Cable/DSL/ISP
Summary
OSTV
isp cable regional slovakia
OSTV SIX is operated by OSTV s.r.o.
What it's used for
- The address space carries residential and business internet access, as indicated by the PeeringDB classification of Cable/DSL/ISP and the registrant netnames
SK-OSTVSRO-20190122andSK-OSTVSRO-20250623. - The AS announces 1280 IPv4 addresses across 2 prefixes and 2 IPv6 prefixes, while maintaining 33 observed neighbours; this ratio of limited address space against a high number of peering partners indicates a regional access provider rather than a transit carrier.
- Traffic from this AS consists of subscriber eyeballs for cable and DSL customers in the Nitra region of Slovakia, consistent with the operator's status as a regional ISP.
Notable
- Registrants for both announced IPv4 prefixes are listed as OSTV s.r.o., matching the AS holder and confirming direct ownership of the address space.
- The address inventory is compact, consisting of a single /22 block and a single /24 block, which is typical for a regional cable operator serving a specific geographic area.
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 2 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Peering.cz | Prague, Czech Republic | 185.0.21.18 |
| Slovak Internet eXchange Bratislava | Bratislava, Slovakia | 192.108.148.35 |
Transit providers
9 upstream, 1 downstream and 17 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 2026-11-02, 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 · 1.28K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SK | Slovakia | 4 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS209531- Registry name
- OSTV
- Registrant
- lir-sk-ostvsro-1-MNT
- Abuse contact
- martin@bella.sk
- Registered
- 2019-01-22
- Last changed
- 2024-04-09
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- OSTV
- Also known as
- Obecne siete
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS209531:AS-OSTV- Present at
- 2 exchanges
- Facilities
- 1 facilities
- Website
- https://www.ostv.sk
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 · 8 valid, 0 with no ROA
- ROAs
- 8 authorising AS209531
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 8 naming AS209531
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: 449 networks and 1,846 prefixes, as published 2026-11-03. 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