asn.dev

Autonomous system

AS8257 SLOVANET-BROADBAND www.slovanet.net

Residential RIPE

IPv4 addresses 82.94K 6 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly SK
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Slovanet

Slovakia · AI-generated

isp broadband legacy

SLOVANET-BROADBAND is the broadband access network of Slovanet a.s., one of Slovakia's larger alternative telecoms operators. This AS carries the company's subscriber access, as distinct from its corporate and infrastructure networks.

What it's used for

  • Roughly 83,000 addresses across thirteen prefixes.
  • The reverse DNS is textbook eyeball addressing, and it names the access technology in the zone: 85-135-192-NN.adsl.slovanet.sk for DSL lines, 176-61-192-NN.wmx.slovanet.sk for the WiMAX/fixed-wireless estate, 178-253-170-NN.vdial.slovanet.sk for dial-style access, and 188-112-64-NN.3pp.slovanet.sk.
  • The newer 185.37.240.0/22 resolves to NN.cgn-stl.slovanet.sk — carrier-grade NAT, so many subscribers share each address there.

Notable

  • Residential and small-business access space. An address here is a Slovak home or small office, and the technology label in the hostname tells you which access product it sits behind.
  • The CGN block matters for attribution: addresses in it are shared across many subscribers, so a single IP does not identify one household.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS8778Slovanet a.s.471

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 6 prefixes · 82.94K addresses IPv6 0 prefixes

CountryNamePrefixes
SKSlovakia6

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS8257
Registry name
SLOVANET-BROADBAND
Registrant
Slovanet a.s.
Abuse contact
abuse00@slovanet.net
Registered
2002-04-03
Last changed
2017-11-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 13 valid, 0 with no ROA
ROAs
13 authorising AS8257
ASPA
no ASPA record
IRR
100% registered · 13 of 13 announcements
Route objects
15 naming AS8257

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: 442 networks and 1,771 prefixes, as published 2026-10-15. 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

Cross-check