AS Name
SEZNAM-CZ
Org Name
Seznam.cz, a.s.
Registry Region
Czech
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 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
AS24482 SGGS-AS-AP - SG.GS, SG Singapore 22,784 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS57463 NetIX - NetIX Communications Ltd., BG Bulgaria 512 0 IPv4 IPv4 IPv6 IPv6
AS39120 CONVERGENZE-AS - Convergenze S.p.A., IT Italy 92,672 4,294,967,296 IPv4 IPv4
AS202297 SKYLON - Skylon Solutions Limited, GB United Kingdom 512 4,295,360,512 IPv4 IPv4 IPv6 IPv6
AS2852 CESNET2 - CESNET z.s.p.o., CZ Czech 848,896 4,294,967,296 IPv6 IPv6
AS5610 O2-CZECH-REPUBLIC - O2 Czech Republic, a.s., CZ Czech 1,552,896 81,604,378,624 IPv4 IPv4 IPv6 IPv6
AS6881 NIXCZ - NIX.CZ z.s.p.o., CZ Czech 3,328 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS8218 NEO-ASN - Zayo France SAS, FR France 56,064 42,950,524,928 IPv4 IPv4 IPv6 IPv6
AS28260 , BR Brazil 16,384 4,294,967,296 IPv4 IPv4
AS36236 NETACTUATE - NetActuate, Inc, US United States 99,328 5,933,629,440 IPv4 IPv4 IPv6 IPv6
AS28186 ITS TELECOMUNICACOES LTDA, BR Brazil 49,152 4,294,967,296 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 514,816 282,635,155,472,384 IPv4 IPv4 IPv6 IPv6
AS29504 LBCFREE - Freenet Liberec, z.s., CZ Czech 1,024 34,359,738,368 IPv4 IPv4 IPv6 IPv6
AS263009 FORTE TELECOM LTDA., BR Brazil 3,072 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS33891 CORE-BACKBONE - Core-Backbone GmbH, DE Germany 0 0 IPv6 IPv6
AS34779 T-2-AS - T-2, d.o.o., SI Slovenia 202,752 34,359,738,368 IPv6 IPv6
AS3216 SOVAM-AS - PJSC "Vimpelcom", RU Russian Federation 1,061,226 4,294,967,296 IPv6 IPv6
AS5394 Unidata - UNIDATA S.p.A., IT Italy 83,456 4,294,967,296 IPv4 IPv4
AS29208 DIALTELECOM-AS - Dial Telecom, a.s., SK Slovakia 260,608 12,884,967,424 IPv4 IPv4 IPv6 IPv6
AS41327 FIBERTELECOM-AS - Fiber Telecom S.p.A., IT Italy 8,192 68,719,476,736 IPv4 IPv4 IPv6 IPv6
AS43531 IXREACH - IX Reach Ltd, GB United Kingdom 14,592 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS60501 SIRIUSTEC-IT - Sirius Technology SRL, IT Italy 4,864 107,374,182,400 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 91.210.16.194 2001:7f8:14::36:1 100 Gbps 2017-03-23 09:21:32
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
Slovakia NIX.SK - Neutral Internet eXchange Slovakia 194.30.187.194 2001:7f8:91::19:1 1 Gbps 2018-05-04 13:49:29
Czech NIX.CZ FENIX 194.50.100.194 2001:7f8:14:5ec::36:1 100 Gbps 2020-02-19 04:07:54
Czech NIX.CZ FENIX 194.50.100.195 2001:7f8:14:5ec::36:2 100 Gbps 2020-02-19 04:07:54

Private Peering Facilities

Country/Region Name City Website Updated
IP Address Domain NUMs Domains
77.75.72.3 4 ask.seznam.cz
77.75.72.4 1 flirt.cz
77.75.72.5 1 email-reg.seznam.cz
77.75.72.9 1 kupi-agent.seznam.cz
77.75.72.12 4 sw-nuts.com
77.75.72.26 1 fulltextrobot-test-77-75-72-26.seznam.cz
77.75.72.48 2 pravoslavnacirkev.cz
77.75.72.60 1 fulltextdns-77-75-72-60.seznam.cz
77.75.72.61 1 fulltextdns-77-75-72-61.seznam.cz
77.75.72.62 1 fulltextdns-77-75-72-62.seznam.cz
as-block:       AS42383 - 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:        2018-11-22T15:27:34Z
last-modified:  2018-11-22T15:27:34Z
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.
org-type:       LIR
address:        Radlicka 3294/10
address:        15000
address:        Prague 5
address:        CZECH REPUBLIC
phone:          +420234694111
fax-no:         +420234694115
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:  2018-10-01T12:45:34Z
source:         RIPE # Filtered

role:           Seznam.cz IT department
address:        Radlicka 3294/10 150 00 Prague 5 Czech Republic
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 # Filtered