AS Number
AS43037
AS Name
SEZNAM-CZ
Org Name
Seznam.cz, a.s.
Country
Czech
Registry

ripe

RegDate

N/A

Updated

2017-11-15T09:48:45Z

AS43037 Looking Glass
IPv4Prefixes

6

IPv6Prefixes

6

IPv4 NUMs

3,072

IPv6 NUMs(/64)

4,294,967,296

3,072 IPv4 Addresses
CIDR Description IP Num
77.75.72.0/23 Seznam.cz, a.s. 512
77.75.74.0/24 SEZNAM-CZ 256
77.75.75.0/24 SEZNAM-CZ 256
77.75.76.0/23 SEZNAM-CZ 512
77.75.78.0/23 SEZNAM-CZ 512
185.66.188.0/22 Seznam.cz, a.s. 1024
CIDR Description IP NUMs(prefix /64)
2a02:598::/32 Seznam.cz, a.s. 4294967296
2a02:598:2::/48 DC-Nagano 65536
2a02:598:a::/48 DC-Kokura 65536
2a02:598:b::/48 DC-Nagano-future 65536
2a02:598:3333::/48 DC-Kokura-DNS 65536
2a02:598:4444::/48 DC-Nagano-dns 65536
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS264409 GRUPO YAX, BR Brazil 1,024 393,216 IPv4 IPv4 IPv6 IPv6
AS34779 T-2-AS - T-2, d.o.o., SI Slovenia 211,968 34,359,738,368 IPv6 IPv6
AS5394 Unidata - UNIDATA S.p.A., IT Italy 83,968 4,294,967,296 IPv4 IPv4
AS263009 FORTE TELECOM LTDA., BR Brazil 3,328 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS29208 DIALTELECOM-AS - Dial Telecom, a.s., CZ Czech 258,560 12,884,967,424 IPv4 IPv4 IPv6 IPv6
AS36236 NETACTUATE - NetActuate, Inc, US United States 56,576 5,665,259,520 IPv4 IPv4 IPv6 IPv6
AS39120 CONVERGENZE-AS - Convergenze S.p.A., IT Italy 31,488 12,884,901,888 IPv4 IPv4
AS43531 IXREACH - IX Reach Ltd, GB United Kingdom 14,592 4,294,967,296 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 494,592 282,665,488,744,448 IPv4 IPv4 IPv6 IPv6
AS8218 NEO-ASN - Zayo France SAS, FR France 53,760 8,590,786,560 IPv4 IPv4 IPv6 IPv6
AS6881 NIXCZ - NIX.CZ z.s.p.o., CZ Czech 3,328 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS14840 COMMCORP COMUNICACOES LTDA, BR Brazil 52,736 16,106,586,112 IPv4 IPv4 IPv6 IPv6
AS24482 SGGS-AS-AP - SG.GS, SG Singapore 23,040 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS41327 FIBERTELECOM-AS - Fiber Telecom S.p.A., IT Italy 8,448 68,719,476,736 IPv4 IPv4 IPv6 IPv6
AS60501 SIRIUSTEC-IT - Sirius Technology SRL, IT Italy 14,336 107,374,182,400 IPv4 IPv4 IPv6 IPv6
AS2852 CESNET2 - CESNET z.s.p.o., CZ Czech 848,896 4,294,967,296 IPv6 IPv6
AS4455 BSO - IX Reach Ltd, GB United Kingdom 14,592 8,589,934,592 IPv4 IPv4 IPv6 IPv6
AS5610 O2-CZECH-REPUBLIC - O2 Czech Republic, a.s., CZ Czech 1,553,664 47,244,640,256 IPv4 IPv4 IPv6 IPv6
AS33891 CORE-BACKBONE - Core-Backbone GmbH, DE Germany 0 0 IPv6 IPv6
AS57463 NetIX - NetIX Communications Ltd., BG Bulgaria 512 0 IPv4 IPv4 IPv6 IPv6
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS200600 SEZNAM-CZ-DC - Seznam.cz datova centra, s.r.o., CZ Czech 1,024 34,359,738,368 IPv4 IPv4 IPv6 IPv6

Peers at this Exchange Point

Country/Region IX IPv4 IPv6 Port Speed Updated
Czech NIX.CZ - Neutral Internet Exchange in the Czech Republic 91.210.16.195 2001:7f8:14::36:2 100 Gbps 2017-03-23 09:21:32
Czech NIX.CZ - Neutral Internet Exchange in the Czech Republic 91.210.16.194 2001:7f8:14::36:1 100 Gbps 2017-03-23 09:21:32
Czech NIX.CZ FENIX 194.50.100.195 2001:7f8:14:5ec::36:2 100 Gbps 2020-02-19 04:07:54
Czech NIX.CZ FENIX 194.50.100.194 2001:7f8:14:5ec::36:1 100 Gbps 2020-02-19 04:07:54

Private Peering Facilities

Country/Region Name City Website Updated
as-block:       AS42961 - AS45055
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:        2021-08-19T06:50:17Z
last-modified:  2021-08-19T06:50:17Z
source:         RIPE



aut-num:        AS43037
as-name:        SEZNAM-CZ
org:            ORG-Sa508-RIPE
import:         from AS9148 accept ANY
import:         from AS5610 accept ANY
export:         to AS9148 announce AS43037
export:         to AS5610 announce AS43037
export:         to AS5610 announce AS200600
admin-c:        SZN5-RIPE
tech-c:         SZN5-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SEZNAM-MNT
created:        2007-05-29T08:00:03Z
last-modified:  2017-11-15T09:48:45Z
source:         RIPE

organisation:   ORG-SA508-RIPE
org-name:       Seznam.cz, a.s.
country:        CZ
org-type:       LIR
address:        Radlicka 3294/10
address:        15000
address:        Prague 5
address:        CZECH REPUBLIC
phone:          +420234694111
fax-no:         +420234694115
e-mail:         [email protected]
admin-c:        PZ172-RIPE
admin-c:        FEIX-RIPE
abuse-c:        AD10910-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        SEZNAM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SEZNAM-MNT
created:        2007-05-01T10:11:05Z
last-modified:  2020-12-16T12:39:31Z
source:         RIPE

role:           Seznam.cz IT department
address:        Radlicka 3294/10 150 00 Prague 5 Czech Republic
e-mail:         [email protected]
phone:          +420 602 126 570
abuse-mailbox:  [email protected]
admin-c:        PZ172-RIPE
tech-c:         SZN11-RIPE
tech-c:         SZN10-RIPE
nic-hdl:        SZN5-RIPE
mnt-by:         SEZNAM-MNT
created:        2007-05-06T15:50:27Z
last-modified:  2015-07-03T13:19:00Z
source:         RIPE