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.

AS51203 BM5 Bartosz Malinowski

Q: Why is WHOIS data shown for an ASN?

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

ASN Lookup Tool

BM5 Bartosz Malinowski leon.pl

PL 1 Routes

AS Data

AS51203

AS51203 – BM5 Bartosz Malinowski

AS Number	51203
AS Name	BM5-AS
Organization	BM5 Bartosz Malinowski (org-bbm2-ripe)
Country	PL
Website	leon.pl
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	ISP
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2010-06-21

ASN Intelligence API for production workflows

Use ASN data for AS51203 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
195.54.50.0/23	AS51203	BM5 Bartosz Malinowski	BM5 Bartosz Malinowski	512

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 'AS50893 - AS51311'

as-block:       AS50893 - AS51311
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:        2024-12-10T14:54:30Z
last-modified:  2024-12-10T14:54:30Z
source:         RIPE

% Information related to 'AS51203'

% Abuse contact for 'AS51203' is 'abuse@leon.pl'

aut-num:        AS51203
as-name:        BM5-AS
org:            ORG-BBM2-RIPE
import:         from AS48850 accept ANY
export:         to AS48850 announce AS51203
import:         from AS49895 accept ANY
export:         to AS49895 announce AS51203
import:         from AS50366 accept ANY
export:         to AS50366 announce AS51203
admin-c:        JK5727-RIPE
tech-c:         JK5727-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         BM5-MNT
created:        2010-06-21T10:37:26Z
last-modified:  2018-09-04T10:52:01Z
source:         RIPE
sponsoring-org: ORG-LSzo6-RIPE

organisation:   ORG-BBM2-RIPE
org-name:       BM5 Bartosz Malinowski
country:        PL
org-type:       OTHER
address:        ul. Mleczna 8, 03-667 Warszawa, PL
abuse-c:        AR24510-RIPE
mnt-ref:        BM5-MNT
mnt-by:         BM5-MNT
created:        2010-05-28T06:05:40Z
last-modified:  2022-12-01T16:17:11Z
source:         RIPE # Filtered

person:         Jakub Kowalczuk
address:        ul. Mleczna 8
address:        03-667 Warszawa
address:        Poland
phone:          +48.606.953701
nic-hdl:        JK5727-RIPE
mnt-by:         BM5-MNT
created:        2010-05-28T05:47:48Z
last-modified:  2010-05-28T05:54:04Z
source:         RIPE # Filtered

% 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" : "AS50893 - AS51311",
    "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" : "2024-12-10",
    "date_updated" : "2024-12-10",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS51203",
    "as_name" : "BM5-AS",
    "status" : "ASSIGNED",
    "import" : [ "from AS48850 accept ANY", "from AS49895 accept ANY", "from AS50366 accept ANY" ],
    "export" : [ "to AS48850 announce AS51203", "to AS49895 announce AS51203", "to AS50366 announce AS51203" ],
    "organization" : "ORG-BBM2-RIPE",
    "sponsoring_organization" : "ORG-LSzo6-RIPE",
    "admin_contacts" : [ "JK5727-RIPE" ],
    "tech_contacts" : [ "JK5727-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "BM5-MNT" ],
    "date_created" : "2010-06-21",
    "date_updated" : "2018-09-04",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-BBM2-RIPE",
    "name" : "BM5 Bartosz Malinowski",
    "type" : "OTHER",
    "address" : [ "ul. Mleczna 8, 03-667 Warszawa, PL" ],
    "street" : "Ul. Mleczna",
    "city" : "Warszawa",
    "zip_code" : "03-667",
    "country" : [ "PL" ],
    "abuse_contacts" : [ "AR24510-RIPE" ],
    "mnt_ref" : [ "BM5-MNT" ],
    "mnt_by" : [ "BM5-MNT" ],
    "date_created" : "2010-05-28",
    "date_updated" : "2022-12-01",
    "source" : "RIPE",
    "addressCountry" : "PL"
  },
  "administrative_contacts" : [ {
    "handle" : "JK5727-RIPE",
    "name" : "Jakub Kowalczuk",
    "address" : [ "ul. Mleczna 8", "03-667 Warszawa", "Poland" ],
    "street" : "Ul. Mleczna",
    "city" : "Warszawa",
    "zip_code" : "03-667",
    "country" : "POLAND",
    "phone" : [ "+48.606.953701" ],
    "mnt_by" : [ "BM5-MNT" ],
    "date_created" : "2010-05-28",
    "date_updated" : "2010-05-28",
    "source" : "RIPE",
    "addressCountry" : "POLAND"
  } ],
  "technical_contacts" : [ {
    "handle" : "JK5727-RIPE",
    "name" : "Jakub Kowalczuk",
    "address" : [ "ul. Mleczna 8", "03-667 Warszawa", "Poland" ],
    "street" : "Ul. Mleczna",
    "city" : "Warszawa",
    "zip_code" : "03-667",
    "country" : "POLAND",
    "phone" : [ "+48.606.953701" ],
    "mnt_by" : [ "BM5-MNT" ],
    "date_created" : "2010-05-28",
    "date_updated" : "2010-05-28",
    "source" : "RIPE",
    "addressCountry" : "POLAND"
  } ]
}

Peers

AS Number	Description	Country
AS49895	dcenter.pl sp. z o.o.	PL
AS48850	Stowarzyszenie e Poludnie	PL
AS50366	AlterTEL Sp. z o.o.	PL
AS44655	MetroLine Sp. z o.o.	PL

Upstreams

AS Number	Description	Country
AS44655	MetroLine Sp. z o.o.	PL

Frequently Asked Questions

What is ASN AS51203?

ASN AS51203 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS51203?

AS51203 is listed under BM5 Bartosz Malinowski.

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.