AS Name Org Name IPv4Prefixes IPv6Prefixes IPv4 NUMs IPv6 NUMs(/64) Registry Region Looking Glass
CTU_AS4 Czech Telecommunication Office 1 1 256 4,294,967,296 Czech
256 IPv4 Addresses
CIDR Description IP Num
185.68.215.0/24 CZ-CTU-MEASUREMENT-SERVER 256
CIDR Description IP NUMs(prefix /64)
2a05:1c47::/32 CZ-CTU-MEASUREMENT-SERVER 4294967296
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS36236 NETACTUATE - NetActuate, Inc, US United States 98,048 5,933,432,832 IPv4 IPv4 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 516,864 282,703,874,752,512 IPv4 IPv4
AS8218 NEO-ASN - Zayo France SAS, FR France 55,296 42,950,524,928 IPv4 IPv4 IPv6 IPv6
AS25248 BlueTone-AS - RADIOKOMUNIKACE a.s., CZ Czech 107,776 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS43531 IXREACH - IX Reach Ltd, GB United Kingdom 14,592 4,294,967,296 IPv4 IPv4
AS267613 ELETRONET S.A., BR Brazil 1,024 4,294,967,296 IPv4 IPv4
AS2852 CESNET2 - CESNET z.s.p.o., CZ Czech 848,896 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS5394 Unidata - UNIDATA S.p.A., IT Italy 83,456 4,294,967,296 IPv4 IPv4
AS57463 NetIX - NetIX Communications Ltd., BG Bulgaria 512 0 IPv4 IPv4
AS24482 SGGS-AS-AP - SG.GS, SG Singapore 22,784 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS39120 CONVERGENZE-AS - Convergenze S.p.A., IT Italy 92,672 4,294,967,296 IPv4 IPv4
AS41327 FIBERTELECOM-AS - Fiber Telecom S.p.A., IT Italy 7,936 68,719,476,736 IPv4 IPv4
AS60501 SIRIUSTEC-IT - Sirius Technology SRL, IT Italy 4,864 107,374,182,400 IPv4 IPv4 IPv6 IPv6
AS202297 SKYLON - Skylon Solutions Limited, GB United Kingdom 512 34,360,131,584 IPv4 IPv4 IPv6 IPv6
AS263009 FORTE TELECOM LTDA., BR Brazil 3,072 4,294,967,296 IPv4 IPv4
as-block:       AS196608 - AS210331
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:        2018-12-04T08:56:54Z
last-modified:  2018-12-04T08:56:54Z
source:         RIPE



aut-num:        AS201594
as-name:        CTU_AS4
org:            ORG-CTO1-RIPE
admin-c:        LAND2-RIPE
tech-c:         VALE2-RIPE
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SUPER-CTU
import:         from AS5588 accept ANY
descr:          NIX.CZ
import:         from AS6881 accept ANY
import:         from AS47200 accept ANY
export:         to AS5588 announce AS201594
descr:          NIX.CZ
export:         to AS6881 announce AS201594
export:         to AS47200 announce AS201594
status:         ASSIGNED
created:        2014-09-12T09:04:28Z
last-modified:  2018-09-04T11:28:44Z
source:         RIPE

organisation:   ORG-CTO1-RIPE
org-name:       Czech Telecommunication Office
org-type:       LIR
address:        Sokolovska 219
address:        19000
address:        Prague
address:        CZECH REPUBLIC
phone:          +420224004601
fax-no:         +420224004827
abuse-c:        AC28632-RIPE
mnt-ref:        SUPER-CTU
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
created:        2014-08-11T09:41:33Z
last-modified:  2016-10-06T15:47:33Z
source:         RIPE # Filtered
admin-c:        VALE2-RIPE
admin-c:        LAND2-RIPE

person:         Petr Landkammer
address:        Sokolovska 219
address:        Prague
address:        19000
address:        The Czech Republic
phone:          +420224004601
nic-hdl:        LAND2-RIPE
mnt-by:         SUPER-CTU
created:        2014-08-13T11:04:57Z
last-modified:  2014-08-13T11:30:02Z
source:         RIPE # Filtered

person:         Pavel Vales
address:        Sokolovska 219
address:        Prague
address:        190000
address:        The Czech Republic
phone:          +420224004667
nic-hdl:        VALE2-RIPE
mnt-by:         SUPER-CTU
created:        2014-08-13T11:24:26Z
last-modified:  2017-10-30T22:38:00Z
source:         RIPE # Filtered