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AS1903 GTS Czech Republic Transit AS

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

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GTS Czech Republic Transit AS

ZZ 0 Routes

AS Data

AS1903

AS1903 – GTS Czech Republic Transit AS

AS Number	1903
AS Name	GTSCZ-TRANSIT
Organization	GTS Czech Republic Transit AS
Country	ZZ
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Allocation Status	LEGACY
Registry	RIPE
Date Allocated	2002-09-10

ASN Intelligence API for production workflows

Use ASN data for AS1903 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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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 'AS1877 - AS1903'

as-block:       AS1877 - AS1903
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:        2018-11-22T15:27:14Z
last-modified:  2018-11-22T15:27:14Z
source:         RIPE

% Information related to 'AS1903'

% No abuse contact registered for AS1903

aut-num:        AS1903
as-name:        GTSCZ-TRANSIT
descr:          GTS Czech Republic Transit AS
admin-c:        MK845-RIPE
admin-c:        MK845-RIPE
admin-c:        MM70-RIPE
tech-c:         GTSC1-RIPE
status:         LEGACY
mnt-by:         GTSCZ-A-MNT
created:        2002-09-10T16:09:40Z
last-modified:  2017-08-09T11:36:49Z
source:         RIPE # Filtered

role:           T-Mobile Czech Republic Hostmaster
address:        T-Mobile Czech Republic a.s.
address:        Tomickova 2144/1
address:        Prague 4
address:        148 00
address:        Czech Republic
phone:          +420 800 737373
fax-no:         +420 2 25251515
admin-c:        LB16056-RIPE
tech-c:         PR5220-RIPE
tech-c:         DC646-RIPE
tech-c:         JH5327-RIPE
tech-c:         LB16056-RIPE
nic-hdl:        GTSC1-RIPE
mnt-by:         GTSCZ-A-MNT
created:        2002-10-18T09:51:40Z
last-modified:  2024-05-24T09:29:17Z
source:         RIPE # Filtered

person:         Marcel Kulistak
address:        KPNQwest Czechia s.r.o. / GTS Czech a.s.
address:        Vinohradska 184
address:        Prague 3
address:        130 52
address:        The Czech Republic
phone:          +420 2 96157111
fax-no:         +420 2 96157333
nic-hdl:        MK845-RIPE
mnt-by:         CZ-NOC
created:        2002-06-06T14:29:57Z
last-modified:  2002-06-06T14:29:57Z
source:         RIPE # Filtered

person:         Michael Macek
address:        Czech Republic
phone:          +420 123456789
nic-hdl:        MM70-RIPE
mnt-by:         MIC-MNT
created:        2002-08-28T09:39:51Z
last-modified:  2015-11-27T08:22:00Z
source:         RIPE # Filtered

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

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS1877 - AS1903",
    "description" : [ "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" ],
    "date_created" : "2018-11-22",
    "date_updated" : "2018-11-22",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS1903",
    "as_name" : "GTSCZ-TRANSIT",
    "description" : [ "GTS Czech Republic Transit AS" ],
    "status" : "LEGACY",
    "admin_contacts" : [ "MK845-RIPE", "MK845-RIPE", "MM70-RIPE" ],
    "tech_contacts" : [ "GTSC1-RIPE" ],
    "mnt_by" : [ "GTSCZ-A-MNT" ],
    "date_created" : "2002-09-10",
    "date_updated" : "2017-08-09",
    "source" : "RIPE"
  } ],
  "administrative_contacts" : [ {
    "handle" : "MK845-RIPE",
    "name" : "Marcel Kulistak",
    "address" : [ "KPNQwest Czechia s.r.o. / GTS Czech a.s.", "Vinohradska 184", "Prague 3", "130 52", "The Czech Republic" ],
    "street" : "Prague",
    "city" : "The",
    "zip_code" : "130 52",
    "country" : "CZECH REPUBLIC",
    "phone" : [ "+420 2 96157111" ],
    "fax_no" : [ "+420 2 96157333" ],
    "mnt_by" : [ "CZ-NOC" ],
    "date_created" : "2002-06-06",
    "date_updated" : "2002-06-06",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  }, {
    "handle" : "MM70-RIPE",
    "name" : "Michael Macek",
    "address" : [ "Czech Republic" ],
    "country" : "CZECH REPUBLIC",
    "phone" : [ "+420 123456789" ],
    "mnt_by" : [ "MIC-MNT" ],
    "date_created" : "2002-08-28",
    "date_updated" : "2015-11-27",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "GTSC1-RIPE",
    "name" : "T-Mobile Czech Republic Hostmaster",
    "address" : [ "T-Mobile Czech Republic a.s.", "Tomickova 2144/1", "Prague 4", "148 00", "Czech Republic" ],
    "street" : "Prague",
    "zip_code" : "148 00",
    "country" : "CZECH REPUBLIC",
    "phone" : [ "+420 800 737373" ],
    "fax_no" : [ "+420 2 25251515" ],
    "admin_contacts" : [ "LB16056-RIPE" ],
    "tech_contacts" : [ "PR5220-RIPE", "DC646-RIPE", "JH5327-RIPE", "LB16056-RIPE" ],
    "mnt_by" : [ "GTSCZ-A-MNT" ],
    "date_created" : "2002-10-18",
    "date_updated" : "2024-05-24",
    "source" : "RIPE",
    "addressCountry" : "CZECH REPUBLIC"
  } ]
}

Frequently Asked Questions

What is ASN AS1903?

ASN AS1903 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS1903?

AS1903 is listed under GTS Czech Republic Transit AS.

What do peers, upstreams, and downstreams mean?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

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.