ASN AS39551 is an Autonomous System Number used to identify a network for BGP internet routing.

What do peers, upstreams, and downstreams mean in ASN data?

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 shown for an ASN?

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

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AS39551 Centre de Telecomunicacions i Tecnologies de la Informació de la Generalitat de Catalunya

Q: Who manages ASN AS39551?

AS39551 is listed under Centre de Telecomunicacions i Tecnologies de la Informació de la Generalitat de Catalunya.

Centre de Telecomunicacions i Tecnologies de la Informació de la Generalitat de Catalunya ctti.gencat.cat

ES 80 Routes

AS Data

AS39551

AS39551 – Centre de Telecomunicacions i Tecnologies de la Informació de la Generalitat de Catalunya

AS Number	39551
AS Name	GENCAT-AS
Organization	Centre de Telecomunicacions i Tecnologies de la Informació de la Generalitat de Catalunya (org-ctit1-ripe)
Country	ES
Website	ctti.gencat.cat
Number of IPv4 Routes	80
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2006-03-16

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IP Ranges

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 'AS38912 - AS39599'

as-block:       AS38912 - AS39599
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:        2023-08-29T07:47:54Z
last-modified:  2023-08-29T07:47:54Z
source:         RIPE

% Information related to 'AS39551'

% Abuse contact for 'AS39551' is 'cert@ciberseguretat.cat'

aut-num:        AS39551
as-name:        GENCAT-AS
org:            ORG-CTiT1-RIPE
import:         from AS3352 accept ANY
import:         from AS12479 accept ANY
import:         from AS21193 accept AS21193
import:         from AS16153 accept AS16153
import:         from AS25412 accept AS25412
export:         to AS3352 announce AS39551
export:         to AS3352 announce AS21193
export:         to AS3352 announce AS16153
export:         to AS3352 announce AS25412
export:         to AS12479 announce AS25412
export:         to AS12479 announce AS39551
export:         to AS12479 announce AS21193
export:         to AS12479 announce AS16153
export:         to AS21193 announce any
export:         to AS16153 announce any
export:         to AS25412 announce any
admin-c:        AXC6-RIPE
tech-c:         AXC6-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         GENCAT-MNT
created:        2006-03-16T15:30:16Z
last-modified:  2026-03-30T14:35:53Z
source:         RIPE

organisation:   ORG-CTiT1-RIPE
org-name:       Centre de Telecomunicacions i Tecnologies de la Informacio de la Generalitat de Catalunya
country:        ES
reg-nr:         Not Applicable
org-type:       LIR
address:        Salvador Espriu 45-51
address:        08908
address:        L'Hospitalet de Llobregat
address:        SPAIN
phone:          +34935574000
fax-no:         +34935574025
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        GENCAT-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         GENCAT-MNT
admin-c:        TVC66-RIPE
abuse-c:        TVC67-RIPE
created:        2004-04-17T11:16:57Z
last-modified:  2026-05-13T07:23:40Z
source:         RIPE # Filtered

role:           Administrador xarxa CTTI
address:        Carrer de Salvador Espriu, 45-51 08908 L'Hospitalet de Llobregat
nic-hdl:        AXC6-RIPE
admin-c:        AG29182-RIPE
admin-c:        MV16457-RIPE
admin-c:        tvc66-ripe
admin-c:        OCM72
admin-c:        SDND5-RIPE
tech-c:         AG29182-RIPE
tech-c:         MV16457-RIPE
tech-c:         tvc66-ripe
tech-c:         OCM72
tech-c:         SDND5-RIPE
created:        2026-03-05T09:50:12Z
last-modified:  2026-03-20T09:33:48Z
source:         RIPE # Filtered
mnt-by:         GENCAT-MNT
mnt-by:         XTEC-MNT

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

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS38912 - AS39599",
    "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" : "2023-08-29",
    "date_updated" : "2023-08-29",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS39551",
    "as_name" : "GENCAT-AS",
    "status" : "ASSIGNED",
    "import" : [ "from AS3352 accept ANY", "from AS12479 accept ANY", "from AS21193 accept AS21193", "from AS16153 accept AS16153", "from AS25412 accept AS25412" ],
    "export" : [ "to AS3352 announce AS39551", "to AS3352 announce AS21193", "to AS3352 announce AS16153", "to AS3352 announce AS25412", "to AS12479 announce AS25412", "to AS12479 announce AS39551", "to AS12479 announce AS21193", "to AS12479 announce AS16153", "to AS21193 announce any", "to AS16153 announce any", "to AS25412 announce any" ],
    "organization" : "ORG-CTiT1-RIPE",
    "admin_contacts" : [ "AXC6-RIPE" ],
    "tech_contacts" : [ "AXC6-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "GENCAT-MNT" ],
    "date_created" : "2006-03-16",
    "date_updated" : "2026-03-30",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-CTiT1-RIPE",
    "name" : "Centre de Telecomunicacions i Tecnologies de la Informacio de la Generalitat de Catalunya",
    "type" : "LIR",
    "address" : [ "Salvador Espriu 45-51", "08908", "L'Hospitalet de Llobregat", "SPAIN" ],
    "city" : "L'hospitalet De Llobregat",
    "zip_code" : "08908",
    "country" : [ "ES" ],
    "phone" : [ "+34935574000" ],
    "fax_no" : [ "+34935574025" ],
    "admin_contacts" : [ "TVC66-RIPE" ],
    "abuse_contacts" : [ "TVC67-RIPE" ],
    "mnt_ref" : [ "RIPE-NCC-HM-MNT", "GENCAT-MNT" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "GENCAT-MNT" ],
    "date_created" : "2004-04-17",
    "date_updated" : "2026-05-13",
    "source" : "RIPE",
    "addressCountry" : "SPAIN"
  },
  "administrative_contacts" : [ {
    "handle" : "AXC6-RIPE",
    "name" : "Administrador xarxa CTTI",
    "address" : [ "Carrer de Salvador Espriu, 45-51 08908 L'Hospitalet de Llobregat" ],
    "street" : "Carrer De Salvador Espriu",
    "city" : "L'hospitalet De Llobregat",
    "zip_code" : "08908",
    "admin_contacts" : [ "AG29182-RIPE", "MV16457-RIPE", "tvc66-ripe", "OCM72", "SDND5-RIPE" ],
    "tech_contacts" : [ "AG29182-RIPE", "MV16457-RIPE", "tvc66-ripe", "OCM72", "SDND5-RIPE" ],
    "mnt_by" : [ "GENCAT-MNT", "XTEC-MNT" ],
    "date_created" : "2026-03-05",
    "date_updated" : "2026-03-20",
    "source" : "RIPE"
  } ],
  "technical_contacts" : [ {
    "handle" : "AXC6-RIPE",
    "name" : "Administrador xarxa CTTI",
    "address" : [ "Carrer de Salvador Espriu, 45-51 08908 L'Hospitalet de Llobregat" ],
    "street" : "Carrer De Salvador Espriu",
    "city" : "L'hospitalet De Llobregat",
    "zip_code" : "08908",
    "admin_contacts" : [ "AG29182-RIPE", "MV16457-RIPE", "tvc66-ripe", "OCM72", "SDND5-RIPE" ],
    "tech_contacts" : [ "AG29182-RIPE", "MV16457-RIPE", "tvc66-ripe", "OCM72", "SDND5-RIPE" ],
    "mnt_by" : [ "GENCAT-MNT", "XTEC-MNT" ],
    "date_created" : "2026-03-05",
    "date_updated" : "2026-03-20",
    "source" : "RIPE"
  } ]
}

Peers

AS Number	Description	Country
AS21193	Centre de Telecomunicacions i Tecnologies de la Informacio de la Generalitat de Catalunya	ES
AS29680	Gamma Operadora de Comunicaciones S.A.	ES
AS8220	COLT Technology Services Group Limited	GB
AS16153	Servei Catala de la Salut	ES
AS3352	TELEFONICA DE ESPANA S.A.U.	ES
AS12479	Orange Espagne SA	ES
AS25412	CORPORACIO CATALANA DE MITJANS AUDIOVISUALS, S.A.	ES

Upstreams

AS Number	Description	Country
AS8220	COLT Technology Services Group Limited	GB
AS3352	TELEFONICA DE ESPANA S.A.U.	ES
AS12479	Orange Espagne SA	ES

Downstreams

AS Number	Description	Country
AS21193	Centre de Telecomunicacions i Tecnologies de la Informacio de la Generalitat de Catalunya	ES
AS16153	Servei Catala de la Salut	ES
AS25412	CORPORACIO CATALANA DE MITJANS AUDIOVISUALS, S.A.	ES

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