ASN Lookup Tool

Seznam.cz, a.s. seznam.cz CZ CZ 12 Routes

AS Data

AS43037

AS43037 – Seznam.cz, a.s.

AS Number 43037
AS Name SEZNAM-CZ
Organization Seznam.cz, a.s. (org-sa508-ripe)
Country CZ
Website seznam.cz
Number of IPv4 Routes 6
Number of IPv6 Routes 6
ASN type ISP
Allocation Status ASSIGNED
Registry RIPE
Date Allocated 2007-05-29

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Use ASN data for AS43037 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
2a02:598:a::/48 ~1×10²⁴
77.75.76.0/23 512
2a02:598:b::/48 ~1×10²⁴
77.75.78.0/23 512
77.75.72.0/23 512
77.75.75.0/24 256
2a02:598:2::/48 ~1×10²⁴
2a02:598:4444::/48 ~1×10²⁴
77.75.74.0/24 256
2a02:598:3333::/48 ~1×10²⁴
2a02:598::/32 ~79×10²⁷
185.66.188.0/22 1024

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS42961 - AS43073'

as-block:       AS42961 - AS43073
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

% Information related to 'AS43037'

% Abuse contact for 'AS43037' is 'abuse@seznam.cz'

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
reg-nr:         26168685
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:        SZN10-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:  2026-07-29T08:38:21Z
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:  abuse@seznam.cz
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

% This query was served by the RIPE Database Query Service version 1.124.1 (ABERDEEN)

Parsed Whois Response

Peers

AS Number Description Country
AS25220 equada network GmbH DE
AS40994 Hohl IT e.U. AT
AS58057 Securebit AG CH
AS213151 Christian Elsen DE
AS20932 Service Telecom CH
AS51907 Kanton Zug CH
AS6881 NIX.CZ z.s.p.o. CZ
AS39249 Netassist International EOOD BG
AS38880 Micron21 Datacentre Pty Ltd AU
AS48858 JSC ER Telecom Holding RU
AS14537 Continent 8 LLC US
AS198150 SIACOM JSC GE
AS45352 IP ServerOne Solutions Sdn Bhd MY
AS15943 wilhelm.tel GmbH DE
AS4230 CLARO S.A. BR
AS31500 Global Network Management Inc AG
AS198249 Ops One AG CH
AS37468 Angola Cables AO
AS47957 Worldline IGSA SA FR
AS60144 3W Infra B.V. NL
AS34288 Kantonsschule Zug CH
AS58511 Anycast Holdings Pty Ltd AU
AS64475 Freifunk Frankfurt am Main e.V. DE
AS29504 Freenet Liberec, z.s. CZ
AS47692 Nessus GmbH AT
AS12859 BIT BV NL
AS206735 Novelcomm LP GR
AS13237 euNetworks GmbH DE
AS14840 BR.Digital Telecom BR
AS35360 Frederic Gargula CH
AS7768 TEKNET VERI MERKEZI HIZMETLERI A.S. TR
AS32590 Valve Corporation US
AS53062 ACESSOLINE TELECOMUNICACOES LTDA BR
AS12735 TurkNet Iletisim Hizmetleri A.S. TR
AS559 SWITCH CH
AS20804 Exatel S.A. PL
AS8758 Iway AG CH
AS60602 Inovare Prim SRL MD
AS8447 A1 Telekom Austria AG AT
AS35625 Eurofiber France SAS FR
AS8801 Rocket Fibre Ltd GB
AS20647 IPB Internet Provider in Berlin GmbH DE
AS1836 green.ch AG CH
AS1828 Unitas Global US
AS264479 Turbozone Internet BR
AS8283 Netwerkvereniging Coloclue NL
AS12741 Netia SA PL
AS142271 EWS DS Networks Inc PH
AS200600 Seznam.cz datova centra, s.r.o. CZ
AS8717 A1 Bulgaria EAD BG
AS63927 RISE ASIA TECHNOLOGY LIMITED PH
AS23106 AMERICAN TOWER DO BRASIL COMUNICAÇÃO MULTIMÍDIA LT BR
AS209823 Enki Multimedia EURL FR
AS8298 IPng Networks GmbH CH
AS7713 Telekomunikasi Indonesia PT ID
AS28917 Fiord Networks, UAB LT
AS14630 Invesco Group Services, Inc. US
AS553 BelWue Koordination DE
AS132337 AXCLUSIVE PTE. LTD. SG
AS34177 Celeste SAS FR

Upstreams

AS Number Description Country
AS7195 EDGEUNO S.A.S CO
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS39351 31173 Services AB SE
AS6204 ZET.NET IP Transit RO
AS25091 IP Max SA CH
AS6939 Hurricane Electric LLC US
AS48362 Stadtwerke Feldkirch AT
AS7713 Telekomunikasi Indonesia PT ID
AS6663 Euroweb Romania S.R.L. RO
AS22356 Durand do Brasil Ltda BR
AS4230 CLARO S.A. BR
AS34177 Celeste SAS FR
AS34019 Hivane Association FR
AS37468 Angola Cables AO
AS8218 operated Upstreamnet gmbh FR
AS47147 ANEXIA Internetdienstleistungs GmbH AT
AS37100 SEACOM Limited MU
AS5610 O2 Czech Republic, a.s. CZ
AS12859 BIT BV NL
AS14840 BR.Digital Telecom BR
AS29632 Netassist International EOOD BG
AS6057 Administracion Nacional de Telecomunicaciones UY
AS47232 ISP Alliance a.s. CZ
AS12779 IT.Gate S.p.A. IT
AS29208 Quantcom, a.s. CZ
AS1836 green.ch AG CH
AS212024 Marc Schmitt FR
AS20485 Joint Stock Company TransTeleCom RU
AS34549 meerfarbig GmbH & Co. KG DE
AS12577 MMC GmbH AT

Downstreams

AS Number Description Country
AS200600 Seznam.cz datova centra, s.r.o. CZ

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Frequently Asked Questions

ASN AS43037 is an Autonomous System Number used to identify a network for BGP internet routing.
AS43037 is listed under Seznam.cz, a.s..
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.