AS48021 ALSTOR A. Zwierzynski i Wspolnicy Sp. z o.o. 🇵🇱 PL

Announcing 1 prefixes, seen at the RIS collectors.

IPv4 prefixes

256 (1 × /24)

IPv6 prefixes

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS48021
Name: ALSTOR A. Zwierzynski i Wspolnicy Sp. z o.o.
Organisation: ALSTOR A. Zwierzynski i Wspolnicy Sp. z o.o.
Country: 🇵🇱 PL
RIR: RIPENCC
Allocated: 2008-10-01

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

0 valid (0.0%) 0 invalid (0.0%) 1 no ROA (100.0%)

Whois

Fetched from whois.ripe.net

as-block:       AS47870 - AS49384
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2025-07-09T08:51:07Z
last-modified:  2025-07-09T08:51:07Z
source:         RIPE

aut-num:        AS48021
as-name:        ALSTOR-AS
org:            ORG-AS91-RIPE
import:         from AS5617 action pref=100; accept ANY
export:         to AS5617 announce AS48021
import:         from AS12968 action pref=100; accept ANY
export:         to AS12968 announce AS48021
admin-c:        KP477-RIPE
admin-c:        SP214-RIPE
tech-c:         KP477-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
tech-c:         SP214-RIPE
mnt-by:         ALSTOR-MNT
created:        2008-10-01T09:30:00Z
last-modified:  2023-06-21T09:17:00Z
source:         RIPE
sponsoring-org: ORG-GCI2-RIPE

organisation:   ORG-AS91-RIPE
org-name:       ALSTOR A. Zwierzynski i Wspolnicy Sp. z o.o.
country:        PL
reg-nr:         011817936
org-type:       OTHER
address:        03-244 Warszawa, Poland
address:        ul. Wenecka 12
phone:          +48225102400
abuse-c:        AR24682-RIPE
admin-c:        KP477-RIPE
admin-c:        SP214-RIPE
tech-c:         KP477-RIPE
tech-c:         SP214-RIPE
mnt-ref:        NETIA-MNT
mnt-by:         NETIA-MNT
mnt-by:         ALSTOR-MNT
created:        2008-08-27T13:51:25Z
last-modified:  2026-06-15T11:12:13Z
source:         RIPE # Filtered

person:         Krzysztof POLEWIAK
address:        ROOT.PL
address:        02-850 WARSZAWA
address:        ul. TROMBITY 44A
address:        POLAND
phone:          +48504188661
nic-hdl:        KP477-RIPE
mnt-by:         ROOTPL-MNT
created:        2003-08-04T11:15:09Z
last-modified:  2008-11-14T11:24:07Z
source:         RIPE # Filtered

person:         Sylwester Pytkowski
address:        ALSTOR Sp.j.
address:        03-244 Warszawa, Poland
address:        ul. Wenecka 12
mnt-by:         ALSTOR-MNT
phone:          +48225102400
nic-hdl:        SP214-RIPE
created:        2008-11-14T11:29:55Z
last-modified:  2008-11-14T11:31:12Z
source:         RIPE # Filtered