asn.dev

Autonomous system

AS42374 INSTALNET-AS

Residential RIPE

IPv4 addresses 2.82K 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly PL
Exchanges 1 recorded by PCH
Upstreams 5 0 downstream
Flagged prefixes 0 none

Summary

Instalnet

Poland · AI-generated

isp residential regional cable

The AS handle INSTALNET-AS is held by Instalnet Szabat Rydzewski Spółka Jawna.

What it's used for

  • The address space carries residential customer traffic, evidenced by reverse DNS entries such as cust176104117-254.instalnet.com.pl and cust9123466-128.instalnet.com.pl.
  • The network announces 2816 IPv4 addresses across 3 prefixes, with 8 observed neighbours, indicating a regional access provider rather than a transit hub.
  • Traffic consists of subscriber eyeballs for cable and DSL services, consistent with the operator's classification as a regional ISP.

Notable

  • All registrants for the announced prefixes are INSTALNET NOC and INSTALNET SZABAT RYDZEWSKI SPOLKA JAWNA, matching the AS holder.
  • The address inventory is composed of three distinct IPv4 blocks: 176.104.112.0/21, 91.234.66.0/23, and 193.17.174.0/24.
  • Reverse DNS also includes NAT-related hostnames like nat64.instalnet.com.pl and nat127.instalnet.com.pl, indicating internal network 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

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
TPIX - Internet ExchangeWarsaw, Poland195.149.233.154

Transit providers

5 upstream, 0 downstream and 5 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS29535Orange Polska Spolka Akcyjna180
AS50607Stowarzyszenie e-Poludnie6
AS5617Orange Polska Spolka Akcyjna3
AS24482SG.GS3
AS201054Stowarzyszenie e-Poludnie3

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 3 prefixes · 2.82K addresses IPv6 0 prefixes

CountryNamePrefixes
PLPoland3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS42374
Registry name
INSTALNET-AS
Registrant
DCENTER-MNT
Abuse contact
abuse-ripe@dcenter.pl
Registered
2012-01-04
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 3 valid, 0 with no ROA
ROAs
3 authorising AS42374
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
4 naming AS42374

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: 443 networks and 1,784 prefixes, as published 2026-10-19. 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