ASN Lookup Tool

FIBER Network s.r.o. fiber.cz CZ CZ 2 Routes

AS Data

AS51800

AS51800FIBER Network s.r.o.

AS Number 51800
AS Name FIBERNET-ASN
Organization FIBER Network s.r.o.(org-fns4-ripe)
Country CZ
Website fiber.cz
Number of IPv4 Routes 1
Number of IPv6 Routes 1
ASN type ISP
Allocation Status ASSIGNED
Registry RIPE
Date Allocated 2010-11-05

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Use ASN data for AS51800 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
2a02:28a8::/32 ~79×10²⁷
217.28.80.0/21 2048

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 'AS51357 - AS51817'

as-block:       AS51357 - AS51817
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:        2025-02-13T13:57:44Z
last-modified:  2025-02-13T13:57:44Z
source:         RIPE

% Information related to 'AS51800'

% Abuse contact for 'AS51800' is 'abuse@fiber.cz'

aut-num:        AS51800
as-name:        FIBERNET-ASN
org:            ORG-FNs4-RIPE
import:         from AS48960 action pref=100; accept ANY
import:         from AS49025 action pref=50; accept ANY
import:         from AS51801 action pref=200; accept ANY
import:         from AS198346 action pref=200; accept ANY
import:         from AS51400 action pref=200; accept ANY
import:         from AS62298 action pref=200; accept ANY
export:         to AS48960 announce AS-FIBERNET-SET
export:         to AS49025 announce AS-FIBERNET-SET
export:         to AS51801 announce AS-FIBERNET-SET
export:         to AS198346 announce AS-FIBERNET-SET
export:         to AS51400 announce AS-FIBERNET-SET
export:         to AS62298 announce AS-FIBERNET-SET
admin-c:        JK6086-RIPE
admin-c:        LM1397-RIPE
tech-c:         JK6086-RIPE
tech-c:         LM1397-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-FIBERCZ
created:        2010-11-05T15:57:48Z
last-modified:  2020-03-27T09:28:20Z
source:         RIPE # Filtered

organisation:   ORG-FNs4-RIPE
org-name:       FIBER Network s.r.o.
country:        CZ
org-type:       LIR
address:        Cimburkova 369/16
address:        130 00
address:        Prague 3
address:        CZECH REPUBLIC
phone:          +420222742742
fax-no:         +420222742744
abuse-c:        AFBR1
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNT-FIBERCZ
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNT-FIBERCZ
created:        2010-10-25T13:22:51Z
last-modified:  2020-12-16T13:18:11Z
source:         RIPE # Filtered

person:         Jiri Kobilak
address:        FIBER Network
address:        Cimburkova 369/16
address:        13000 Praha 3
address:        Czech Republic / EU
nic-hdl:        JK6086-RIPE
created:        2010-10-27T23:27:39Z
last-modified:  2010-11-10T18:23:34Z
source:         RIPE # Filtered
phone:          +420222742742
mnt-by:         MNT-COBOOL

person:         Lukas Mesani
phone:          +420-222-742-740
address:        Czech Republic
nic-hdl:        LM1397-RIPE
mnt-by:         MNT-FRODO
created:        2006-06-07T13:57:53Z
last-modified:  2020-03-03T14:23:08Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.121 (SHETLAND)

Parsed Whois Response

Peers

AS Number Description Country
AS24482 SG.GS SG
AS51801 INTERNET KUTUSU TELEKOMUNIKASYON BILISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI TR
AS40994 Hohl IT e.U. AT
AS6881 NIX.CZ z.s.p.o. CZ
AS198346 NETFORMS s.r.o. CZ
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS60602 Inovare-Prim SRL MD
AS6939 Hurricane Electric LLC US
AS6204 ZET.NET IP Transit RO
AS51184 Fonira Telekom GmbH AT

Upstreams

AS Number Description Country
AS39120 Convergenze S.p.A. IT
AS1764 Next Layer Telekommunikationsdienstleistungs und Beratungs GmbH AT
AS263444 Open X Tecnologia Ltda BR
AS8218 operated Upstreamnet gmbh FR
AS4455 IX Reach Ltd GB
AS6204 ZET.NET IP Transit RO
AS6939 Hurricane Electric LLC US
AS51400 SPOJE.NET s.r.o. CZ
AS6663 Euroweb Romania S.R.L. RO
AS47200 NIX.CZ z.s.p.o. CZ

Downstreams

AS Number Description Country
AS42000 Futruy s.r.o. CZ
AS51400 SPOJE.NET s.r.o. CZ

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Frequently Asked Questions

ASN AS51800 is an Autonomous System Number used to identify a network for BGP internet routing.
AS51800 is listed under FIBER Network s.r.o..
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.