AS204021 CIECH S.A. 🇵🇱 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: AS204021
Name: CIECH S.A.
Organisation: CIECH S.A.
Country: 🇵🇱 PL
RIR: RIPENCC
Allocated: 2015-09-14

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

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

Whois

Fetched from whois.ripe.net

as-block:       AS203940 - AS205662
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:        2026-03-05T15:29:31Z
last-modified:  2026-03-05T15:29:31Z
source:         RIPE

aut-num:        AS204021
as-name:        Ciech
org:            ORG-CS380-RIPE
import:         from AS15694 accept ANY
export:         to AS15694 announce AS204021
import:         from AS20960 accept ANY
export:         to AS20960 announce AS204021
admin-c:        ATMA1-RIPE
admin-c:        RD6878-RIPE
tech-c:         RD6878-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         ATMAN-MNT
created:        2015-09-14T11:55:00Z
last-modified:  2020-11-16T17:51:59Z
source:         RIPE
sponsoring-org: ORG-AS25-RIPE

organisation:   ORG-CS380-RIPE
org-name:       CIECH S.A.
country:        PL
reg-nr:         011179878
org-type:       OTHER
address:        Wspolna 62
address:        02-682 Warszawa
address:        PL
phone:          +48226391200
abuse-c:        AC32896-RIPE
admin-c:        RD6878-RIPE
tech-c:         RD6878-RIPE
mnt-ref:        ATMAN-MNT
mnt-by:         ATMAN-MNT
created:        2015-09-10T07:32:42Z
last-modified:  2026-05-13T05:48:31Z
source:         RIPE # Filtered

role:           ATMAN NOC
address:        ATM S.A.
address:        ul. Grochowska 21a
address:        04-186 Warsaw
address:        Poland
phone:          +48-22-5156900
fax-no:         +48-22-5156777
admin-c:        AW1695-RIPE
admin-c:        IM5944-RIPE
admin-c:        MW2381-RIPE
admin-c:        MW8754-RIPE
admin-c:        AW6357-RIPE
admin-c:        JM22993-RIPE
tech-c:         AW1695-RIPE
tech-c:         IM5944-RIPE
tech-c:         MW2381-RIPE
tech-c:         LP11986-RIPE
tech-c:         AP29256-RIPE
tech-c:         MW8754-RIPE
tech-c:         AW6357-RIPE
tech-c:         JM22993-RIPE
nic-hdl:        ATMA1-RIPE
mnt-by:         ATMAN-MNT
created:        2002-08-04T14:06:36Z
last-modified:  2024-01-08T11:32:07Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@atman.pl

person:         Konrad Nazar
address:        CIECH S.A.
address:        Wspolna 62
address:        02-682 Warszawa
address:        PL
phone:          +48226391200
nic-hdl:        RD6878-RIPE
mnt-by:         ATMAN-MNT
created:        2015-09-10T07:25:06Z
last-modified:  2023-01-12T09:38:54Z
source:         RIPE # Filtered