Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS203821

Announcement observedRIPE NCC

IT4-POLSKA IT4 Polska Sp. z o.o. · IT4-POLSKA

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/15/2026, 00:00:00Snapshot expired

View network topology RDAP registration

ASN: AS203821
Registration country: Poland
Name: IT4-POLSKA IT4 Polska Sp. z o.o.
Abbreviation: IT4-POLSKA
Registration date: 10/23/2015, 06:40:24
Status: Announcement observed
RIR: RIPE NCC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
217.28.134.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/26/2026, 08:00:00	10/10/2026, 08:00:00	✓	×	Historical record
91.207.184.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/26/2026, 08:00:00	10/10/2026, 08:00:00	✓	×	Historical record
91.207.185.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/26/2026, 08:00:00	10/10/2026, 08:00:00	✓	×	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: IT4-POLSKA IT4 Polska Sp. z o.o.
RIR: RIPE NCC
Registration country: Poland
Registration date: 10/23/2015, 06:40:24
Abuse contact: biuro@it4polska.pl

Snapshot trend

10/10/2026, 16:23:233 v40 v64 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · rir-rdap-asn · iana-rdap-asn-bootstrap · cha-la-bgp-observations