206208 looking glass

AS43757 ICZ a.s. 🇨🇿 CZ

Announcing 3 prefixes, seen at the RIS collectors.

IPv4 prefixes
2
2,304 (9 × /24)
IPv6 prefixes
1
1 × /48
Upstreams
3
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS43757
Name
ICZ a.s.
Organisation
ICZ a.s.
Country
🇨🇿 CZ
RIR
RIPENCC
Allocated
2007-09-24

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

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

Whois

Fetched from whois.ripe.net

as-block:       AS43075 - AS44168
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:        2023-12-11T15:09:58Z
last-modified:  2023-12-11T15:09:58Z
source:         RIPE

aut-num:        AS43757
as-name:        ICZAS-CZ
org:            ORG-Ia714-RIPE
remarks:        >> =========== Czech Republic ===========
remarks:        >> O2 Czech Republic
import:         from AS5610 accept ANY
export:         to AS5610 announce {78.31.24.0/21};
remarks:        >> T-Mobile Czech Republic (GTS CZ)
import:         from AS5588 accept ANY
export:         to AS5588 announce {78.31.24.0/21};
remarks:        >> =========== Slovakia =================
remarks:        >> Slovak Telekom
import:         from AS6855 accept ANY
export:         to AS6855 announce {192.108.126.0/24};
remarks:        >> Slovanet
import:         from AS8778 accept ANY
export:         to AS8778 announce {192.108.126.0/24};
remarks:        >> SWAN
import:         from AS5578 accept ANY
export:         to AS5578 announce {192.108.126.0/24};
remarks:        >> ======================================
mp-import:      afi ipv6.unicast from AS5610 accept ANY
mp-export:      afi ipv6.unicast to AS5610 announce AS43757
mp-import:      afi ipv6.unicast from AS5588 accept ANY
mp-export:      afi ipv6.unicast to AS5588 announce AS43757
remarks:        >> ======================================
admin-c:        ICZ-CZ
tech-c:         ICZ-CZ
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         ICZAS-MNT
created:        2007-09-24T13:16:02Z
last-modified:  2025-10-02T08:48:24Z
source:         RIPE
sponsoring-org: ORG-Ra2-RIPE

organisation:   ORG-IA714-RIPE
org-name:       ICZ a.s.
country:        CZ
reg-nr:         25145444
org-type:       OTHER
address:        Na hrebenech II 1718/10
address:        Praha 4
address:        140 00
address:        Czech Republic
abuse-c:        ABC-CZ
mnt-ref:        ICZAS-MNT
mnt-by:         ICZAS-MNT
mnt-by:         GTSCZ-MNT
created:        2007-09-19T08:30:38Z
last-modified:  2026-05-13T05:39:25Z
source:         RIPE # Filtered

role:           ICZ Hostmaster
address:        ICZ.Services a.s.
address:        Na hrebenech II 1718/10
address:        Praha 4
address:        140 00
address:        Czech Republic
phone:          +420 222271111
fax-no:         +420 222271112
abuse-mailbox:  abuse@i.cz
admin-c:        DR-CZ
tech-c:         OB-CZ
tech-c:         PH-CZ
tech-c:         VO-CZ
mnt-by:         ICZAS-MNT
nic-hdl:        ICZ-CZ
created:        2008-03-23T10:30:34Z
last-modified:  2025-03-05T09:19:16Z
source:         RIPE # Filtered