asn.dev

Autonomous system

AS43153 SFERANET-AS

Unclassified RIPE

IPv4 addresses 3.58K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly PL
Exchanges 0 recorded by PCH
Upstreams 6 1 downstream
Flagged prefixes 0 none

Summary

SferaNET

Poland · AI-generated

fiber isp residential poland

SFERANET-AS is operated by SferaNET Sp. z o.o.

What it's used for

  • The address space carries fiber-to-the-home subscriber traffic, evidenced by netnames PL-FIBRETECH and SFERANET-BB, and reverse DNS entries such as rev197-255.sferanet.pl and rev-208-128.sferanet.pl.
  • The AS announces 3584 IPv4 addresses across 5 prefixes and maintains 10 observed neighbours, a ratio consistent with a regional access network rather than a transit provider.
  • Traffic from this AS consists of residential and business broadband users in the Bielsko-Biała region of Poland, utilizing fiber-optic connections for internet, television, and voice services.

Notable

  • Registrants for the majority of prefixes (91.192.196.0/22, 91.215.32.0/22, 193.200.82.0/23) are listed as SferaNET Sp. z o.o., while 85.219.208.0/23 is registered to T-Mobile.pl B2B and 195.136.160.0/23 to ABUSE EXATEL, indicating inherited or leased address space.
  • SferaNET Sp. z o.o. was incorporated in 2023 following the merger of Fibreo S.A. and SferaNET sp. z o.o., which began operating under the unified SferaNET brand in April 2025.
  • The inventory consists of five distinct IPv4 prefixes with no announced IPv6 space, reflecting a legacy IPv4-centric infrastructure.

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

6 upstream, 1 downstream and 7 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS29535Orange Polska Spolka Akcyjna127
AS20804Exatel S.A.102
AS12912T-Mobile Polska S.A.73
AS9141P4 Sp. z o.o.67
AS197064EmiTel S.A.7
AS24482SG.GS2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, 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 5 prefixes · 3.58K addresses IPv6 0 prefixes

CountryNamePrefixes
PLPoland5

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS43153
Registry name
SFERANET-AS
Registrant
SferaNET Sp. z o.o.
Abuse contact
abuse@sferanet.pl
Registered
2007-06-14
Last changed
2025-08-13
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
50% valid · 3 valid, 3 with no ROA
ROAs
4 authorising AS43153
ASPA
no ASPA record
IRR
100% registered · 6 of 6 announcements
Route objects
9 naming AS43153

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

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 1,779 prefixes, as published 2026-10-22. 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