AS43757 - ICZAS-CZ - ICZ a.s., CZ

Czech Slovakia
AS Number
AS43757
AS Name
ICZAS-CZ
Org Name
ICZ a.s.
Country / Region
Czech
Registry

ripe

RegDate

Updated

2023-12-11T15:09:58Z

AS43757 Looking Glass
IPv4Prefixes

2

IPv6Prefixes

1

IPv4 NUMs

2,304

IPv6 NUMs(/64)

65,536

CIDR Description IP Num
78.31.24.0/21
IRR Valid
ICZ a.s. 2048
192.108.126.0/24
IRR Valid
ICZ a.s. 256
CIDR Description IP NUMs(prefix /64)
2001:67c:1578::/48
IRR Valid
ICZ a.s. 65536
AS Description Country / Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS6855 SK-TELEKOM - Slovak Telekom, a.s., SK Slovakia 663,296 38,671,876,096 IPv4 IPv4 IPv6 IPv6
AS5578 AS-BENESTRA - SWAN, a.s., SK Slovakia 322,816 51,539,607,552 IPv4 IPv4
AS5610 O2-CZECH-REPUBLIC - O2 Czech Republic, a.s., CZ Czech 1,542,400 47,244,705,792 IPv4 IPv4 IPv6 IPv6

Whois Record

as-block AS43075 - AS44168

as-block
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

aut-num
as-name
ICZAS-CZ
org
ORG-Ia714-RIPE
remarks
>> =========== Czech Republic ===========
>> O2 Czech Republic
>> T-Mobile Czech Republic (GTS CZ)
>> =========== Slovakia =================
>> Slovak Telekom
>> Slovanet
>> SWAN
>> ======================================
>> ======================================
import
from AS5610 accept ANY
from AS5588 accept ANY
from AS6855 accept ANY
from AS8778 accept ANY
from AS5578 accept ANY
export
to AS5610 announce {78.31.24.0/21};
to AS5588 announce {78.31.24.0/21};
to AS6855 announce {192.108.126.0/24};
to AS8778 announce {192.108.126.0/24};
to AS5578 announce {192.108.126.0/24};
mp-import
afi ipv6.unicast from AS5610 accept ANY
afi ipv6.unicast from AS5588 accept ANY
mp-export
afi ipv6.unicast to AS5610 announce AS43757
afi ipv6.unicast to AS5588 announce AS43757
admin-c
ICZ-CZ
tech-c
ICZ-CZ
status
ASSIGNED
mnt-by
RIPE-NCC-END-MNT
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

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

role ICZ Hostmaster

role
ICZ Hostmaster
address
ICZ.Services a.s.
Na hrebenech II 1718/10
Praha 4
140 00
Czech Republic
phone
+420 222271111
fax-no
+420 222271112
e-mail
abuse-mailbox
admin-c
DR-CZ
tech-c
OB-CZ
PH-CZ
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
 

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
e-mail:         [email protected]
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

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
e-mail:         [email protected]
abuse-mailbox:  [email protected]
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