ASN Lookup Tool

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

AS Data

AS43037

AS43037Seznam.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:        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:  2026-05-13T07:31:09Z
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 1.123 (BUSA)

Parsed Whois Response

Peers

AS Number Description Country
AS12552 GlobalConnect AB SE
AS40994 Hohl IT e.U. AT
AS51907 Kanton Zug CH
AS213151 Christian Elsen DE
AS58057 Securebit AG CH
AS25220 equada network GmbH DE
AS6881 NIX.CZ z.s.p.o. CZ
AS20932 Service Telecom CH
AS39249 Netassist International EOOD BG
AS60602 Inovare-Prim SRL MD
AS38880 Micron21 Datacentre Pty Ltd AU
AS14537 Continent 8 LLC US
AS198150 SIACOM JSC GE
AS15943 wilhelm.tel GmbH DE
AS45352 IP ServerOne Solutions Sdn Bhd MY
AS198249 Ops One AG CH
AS8529 Zain Omantel International FZ-LLC AE
AS37468 Angola Cables AO
AS47957 Worldline IGSA SA FR
AS60144 3W Infra B.V. NL
AS199524 G-Core Labs S.A. LU
AS34288 Kantonsschule Zug CH
AS64475 Freifunk Frankfurt am Main e.V. DE
AS29504 Freenet Liberec, z.s. CZ
AS47692 Nessus GmbH AT
AS53062 GGNET TELECOMUNICACOES LTDA BR
AS206735 Novelcomm LP GR
AS12859 BIT BV NL
AS13237 euNetworks GmbH DE
AS14840 BR.Digital Telecom BR
AS13058 serve-u - Buchholz und Suenderhauf GbR DE
AS21497 PrJSC "VF UKRAINE" UA
AS35360 Frederic Gargula CH
AS32590 Valve Corporation US
AS12735 TurkNet Iletisim Hizmetleri A.S. TR
AS559 SWITCH CH
AS8758 Iway AG CH
AS4601 Antonios A. Chariton GR
AS8801 Rocket Fibre Ltd GB
AS35625 Eurofiber France SAS FR
AS20647 IPB Internet Provider in Berlin GmbH DE
AS25091 IP Max SA ZZ
AS1836 green.ch AG CH
AS1828 Unitas Global US
AS264479 Turbozone Internet BR
AS8283 Netwerkvereniging Coloclue NL
AS20932 Services Industriels de Geneve CH
AS142271 EWS DS Networks Inc PH
AS12741 Netia SA PL
AS45701 PT. Internet Madju Abad Milenindo ID
AS8717 A1 Bulgaria EAD BG
AS200600 Seznam.cz datova centra, s.r.o. CZ
AS31027 GlobalConnect A/S DK
AS64289 Macarne.com US
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

Upstreams

AS Number Description Country
AS7195 EDGEUNO S.A.S CO
AS39249 Netassist International EOOD BG
AS39351 31173 Services AB SE
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS22356 Durand do Brasil Ltda BR
AS37468 Angola Cables AO
AS20764 CJSC RASCOM RU
AS47147 ANEXIA Internetdienstleistungs GmbH AT
AS24889 Monzoon Networks AG CH
AS12859 BIT BV NL
AS30781 Free Pro SAS FR
AS14840 BR.Digital Telecom BR
AS29632 Netassist International EOOD BG
AS24961 WIIT AG DE
AS8758 Iway AG CH
AS12779 IT.Gate S.p.A. IT
AS4601 Antonios A. Chariton GR
AS35625 Eurofiber France SAS FR
AS25091 IP Max SA ZZ
AS212024 Marc Schmitt FR
AS1836 green.ch AG CH
AS20485 Joint Stock Company TransTeleCom RU
AS8283 Netwerkvereniging Coloclue NL
AS34549 meerfarbig GmbH & Co. KG DE
AS28716 Retelit Digital Services S.p.A. IT
AS34927 iFog GmbH CH
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS6695 DE CIX Management GmbH DE
AS48362 Stadtwerke Feldkirch AT
AS7713 Telekomunikasi Indonesia PT ID
AS6663 Euroweb Romania S.R.L. RO
AS33891 Core Backbone GmbH DE
AS205103 Telegraph42 Management GmbH DE
AS34019 Hivane Association FR
AS34177 Celeste SAS FR
AS60171 AFR IX TELECOM S.A. ES
AS4455 IX Reach Ltd GB
AS8218 operated Upstreamnet gmbh FR
AS37100 SEACOM Limited MU
AS39120 Convergenze S.p.A. IT
AS5610 O2 Czech Republic, a.s. CZ
AS6057 Administracion Nacional de Telecomunicaciones UY
AS5405 Inter.link GmbH DE
AS47232 ISP Alliance a.s. CZ
AS41327 Fiber Telecom S.p.A. IT
AS29691 Nine Internet Solutions AG CH
AS29208 Quantcom, a.s. CZ
AS35280 F5 Networks SARL FR
AS20562 Broadband Hosting B.V. NL
AS5713 SAIX NET ZA
AS137409 GSL Networks Pty LTD AU
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.