ASN AS42421 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS42421?

AS42421 is listed under Turkiye Finans Katilim Bankasi A.S.

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.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS42421 Turkiye Finans Katilim Bankasi A.S

ASN Lookup Tool

Turkiye Finans Katilim Bankasi A.S turkiyefinans.com.tr

TR 7 Routes

AS Data

AS42421

AS42421 – Turkiye Finans Katilim Bankasi A.S

AS Number	42421
AS Name	TurkiyeFinans
Organization	Turkiye Finans Katilim Bankasi A.S (org-tfkb1-ripe)
Country	TR
Website	turkiyefinans.com.tr
Number of IPv4 Routes	6
Number of IPv6 Routes	1
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2007-02-19

ASN Intelligence API for production workflows

Use ASN data for AS42421 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
77.72.187.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	256
77.72.186.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	256
77.72.189.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi A.S	256
2a03:c6c0::/48	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	~1×10²⁴
77.72.184.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	256
77.72.185.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	256
77.72.188.0/24	AS42421	Turkiye Finans Katilim Bankasi A.S	Turkiye Finans Katilim Bankasi	256

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 'AS42383 - AS42959'

as-block:       AS42383 - AS42959
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:        2021-08-19T06:50:17Z
last-modified:  2021-08-19T06:50:17Z
source:         RIPE

% Information related to 'AS42421'

% Abuse contact for 'AS42421' is 'siteadmin@turkiyefinans.com.tr'

aut-num:        AS42421
as-name:        TurkiyeFinans
org:            ORG-TFKB1-RIPE
import:         from AS9121 accept ANY
import:         from AS34984 accept ANY
export:         to AS9121 announce AS42421
export:         to AS34984 announce AS42421
admin-c:        TFSA1-RIPE
tech-c:         TFSA1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         mnt-turkiyefinans
created:        2007-02-19T15:36:55Z
last-modified:  2018-09-04T10:22:11Z
source:         RIPE # Filtered

organisation:   ORG-TFKB1-RIPE
org-name:       Turkiye Finans Katilim Bankasi A.S
country:        TR
org-type:       LIR
address:        Sokullu Caddesi No:6
address:        34876
address:        Umraniye/Istanbul ?
address:        TURKEY
phone:          +902165867000
fax-no:         +902165866313
abuse-c:        AR17400-RIPE
admin-c:        TFSA1-RIPE
mnt-by:         MNT-TURKIYEFINANS
mnt-ref:        MNT-TURKIYEFINANS
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
created:        2007-02-09T11:11:10Z
last-modified:  2026-02-04T12:39:06Z
source:         RIPE # Filtered

person:         Turkiye Finans Site Admin
address:        Yakacik Mevkii Adnan Kahveci Caddesi
address:        No:139 Kartal ISTANBUL
phone:          +902165867000
nic-hdl:        TFSA1-RIPE
created:        2008-11-07T21:21:11Z
last-modified:  2011-12-07T19:55:32Z
source:         RIPE
mnt-by:         mnt-turkiyefinans

% This query was served by the RIPE Database Query Service version 1.121.2 (DEXTER)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS42383 - AS42959",
    "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" : "2021-08-19",
    "date_updated" : "2021-08-19",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS42421",
    "as_name" : "TurkiyeFinans",
    "status" : "ASSIGNED",
    "import" : [ "from AS9121 accept ANY", "from AS34984 accept ANY" ],
    "export" : [ "to AS9121 announce AS42421", "to AS34984 announce AS42421" ],
    "organization" : "ORG-TFKB1-RIPE",
    "admin_contacts" : [ "TFSA1-RIPE" ],
    "tech_contacts" : [ "TFSA1-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "mnt-turkiyefinans" ],
    "date_created" : "2007-02-19",
    "date_updated" : "2018-09-04",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-TFKB1-RIPE",
    "name" : "Turkiye Finans Katilim Bankasi A.S",
    "type" : "LIR",
    "address" : [ "Sokullu Caddesi No:6", "34876", "Umraniye/Istanbul ?", "TURKEY" ],
    "street" : "Sokullu Caddesi No",
    "city" : "Umraniye/istanbul ?",
    "zip_code" : "34876",
    "country" : [ "TR" ],
    "phone" : [ "+902165867000" ],
    "fax_no" : [ "+902165866313" ],
    "admin_contacts" : [ "TFSA1-RIPE" ],
    "abuse_contacts" : [ "AR17400-RIPE" ],
    "mnt_ref" : [ "MNT-TURKIYEFINANS", "RIPE-NCC-HM-MNT" ],
    "mnt_by" : [ "MNT-TURKIYEFINANS", "RIPE-NCC-HM-MNT" ],
    "date_created" : "2007-02-09",
    "date_updated" : "2026-02-04",
    "source" : "RIPE",
    "addressCountry" : "TURKEY"
  },
  "administrative_contacts" : [ {
    "handle" : "TFSA1-RIPE",
    "name" : "Turkiye Finans Site Admin",
    "address" : [ "Yakacik Mevkii Adnan Kahveci Caddesi", "No:139 Kartal ISTANBUL" ],
    "street" : "Yakacik Mevkii Adnan Kahveci Caddesi",
    "city" : "Istanbul",
    "phone" : [ "+902165867000" ],
    "mnt_by" : [ "mnt-turkiyefinans" ],
    "date_created" : "2008-11-07",
    "date_updated" : "2011-12-07",
    "source" : "RIPE"
  } ],
  "technical_contacts" : [ {
    "handle" : "TFSA1-RIPE",
    "name" : "Turkiye Finans Site Admin",
    "address" : [ "Yakacik Mevkii Adnan Kahveci Caddesi", "No:139 Kartal ISTANBUL" ],
    "street" : "Yakacik Mevkii Adnan Kahveci Caddesi",
    "city" : "Istanbul",
    "phone" : [ "+902165867000" ],
    "mnt_by" : [ "mnt-turkiyefinans" ],
    "date_created" : "2008-11-07",
    "date_updated" : "2011-12-07",
    "source" : "RIPE"
  } ]
}

Peers

AS Number	Description	Country
AS34984	Superonline Iletisim Hizmetleri A.S.	TR
AS9121	Turk Telekomunikasyon Anonim Sirketi	TR

Upstreams

AS Number	Description	Country
AS34984	Superonline Iletisim Hizmetleri A.S.	TR
AS9121	Turk Telekomunikasyon Anonim Sirketi	TR