ASN AS50331 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS50331?

AS50331 is listed under CITYNET Sp.z o.o..

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.

AS50331 CITYNET Sp.z o.o. | IPGeolocation.io

ASN Lookup Tool

CITYNET Sp.z o.o. insite.pl

PL 3 Routes

AS Data

AS50331

AS50331 – CITYNET Sp.z o.o.

AS Number	50331
AS Name	CITYNET
Organization	CITYNET Sp.z o.o. (org-ca1002-ripe)
Country	PL
Website	insite.pl
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	ISP
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2009-12-21

ASN Intelligence API for production workflows

Use ASN data for AS50331 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
178.217.192.0/21	AS50331	CITYNET Sp.z o.o.	CITYNET Sp.z o.o.	2048
178.217.196.0/24	AS50331	CITYNET Sp.z o.o.	CITYNET Sp.z o.o.	256
178.217.197.0/24	AS50331	CITYNET Sp.z o.o.	CITYNET Sp.z o.o.	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 'AS50220 - AS50841'

as-block:       AS50220 - AS50841
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:        2024-08-12T14:10:44Z
last-modified:  2024-08-12T14:10:44Z
source:         RIPE

% Information related to 'AS50331'

% Abuse contact for 'AS50331' is 'isp@insite.pl'

aut-num:        AS50331
as-name:        CITYNET
remarks:        CITYNET
org:            ORG-CA1002-RIPE
import:         from AS33951 accept ANY
import:         from AS43435 accept ANY
export:         to AS33951 announce AS50331
export:         to AS43435 announce AS50331
admin-c:        TP1292-RIPE
tech-c:         TP1292-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-INSITE-SPZOO
created:        2009-12-21T09:12:57Z
last-modified:  2018-09-04T10:47:11Z
source:         RIPE # Filtered
sponsoring-org: ORG-ISZO9-RIPE

organisation:   ORG-CA1002-RIPE
org-name:       CITYNET Sp.z o.o.
country:        PL
reg-nr:         100067018
org-type:       OTHER
address:        Staszica 9, Brzeziny
abuse-c:        AR25874-RIPE
mnt-ref:        MNT-INSITE-SPZOO
mnt-by:         MNT-INSITE-SPZOO
created:        2009-12-17T01:07:05Z
last-modified:  2026-05-13T05:11:25Z
source:         RIPE # Filtered

person:         Tomasz Pawlowski
address:        FORWEB
address:        91-463 Lodz
address:        Lagiewnicka street
address:        no 54/56
address:        Poland
phone:          +48422351000
fax-no:         +48422351001
nic-hdl:        TP1292-RIPE
mnt-by:         FORWEB-MNT
phone:          +48 780280700
created:        2004-09-09T08:28:07Z
last-modified:  2024-12-02T13:06:02Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.122.1 (ABERDEEN)


% 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 'AS50220 - AS50841'

as-block:       AS50220 - AS50841
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:        2024-08-12T14:10:44Z
last-modified:  2024-08-12T14:10:44Z
source:         RIPE

% Information related to 'AS50331'

% Abuse contact for 'AS50331' is 'isp@insite.pl'

aut-num:        AS50331
as-name:        CITYNET
remarks:        CITYNET
org:            ORG-CA1002-RIPE
import:         from AS33951 accept ANY
import:         from AS43435 accept ANY
export:         to AS33951 announce AS50331
export:         to AS43435 announce AS50331
admin-c:        TP1292-RIPE
tech-c:         TP1292-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-INSITE-SPZOO
created:        2009-12-21T09:12:57Z
last-modified:  2018-09-04T10:47:11Z
source:         RIPE # Filtered
sponsoring-org: ORG-ISZO9-RIPE

organisation:   ORG-CA1002-RIPE
org-name:       CITYNET Sp.z o.o.
country:        PL
reg-nr:         100067018
org-type:       OTHER
address:        Staszica 9, Brzeziny
abuse-c:        AR25874-RIPE
mnt-ref:        MNT-INSITE-SPZOO
mnt-by:         MNT-INSITE-SPZOO
created:        2009-12-17T01:07:05Z
last-modified:  2026-05-13T05:11:25Z
source:         RIPE # Filtered

person:         Tomasz Pawlowski
address:        FORWEB
address:        91-463 Lodz
address:        Lagiewnicka street
address:        no 54/56
address:        Poland
phone:          +48422351000
fax-no:         +48422351001
nic-hdl:        TP1292-RIPE
mnt-by:         FORWEB-MNT
phone:          +48 780280700
created:        2004-09-09T08:28:07Z
last-modified:  2024-12-02T13:06:02Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.122.1 (SHETLAND)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS50220 - AS50841",
    "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" : "2024-08-12",
    "date_updated" : "2024-08-12",
    "source" : "RIPE"
  }, {
    "as_block" : "AS50220 - AS50841",
    "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" : "2024-08-12",
    "date_updated" : "2024-08-12",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS50331",
    "as_name" : "CITYNET",
    "status" : "ASSIGNED",
    "import" : [ "from AS33951 accept ANY", "from AS43435 accept ANY" ],
    "export" : [ "to AS33951 announce AS50331", "to AS43435 announce AS50331" ],
    "organization" : "ORG-CA1002-RIPE",
    "sponsoring_organization" : "ORG-ISZO9-RIPE",
    "admin_contacts" : [ "TP1292-RIPE" ],
    "tech_contacts" : [ "TP1292-RIPE" ],
    "remarks" : [ "CITYNET" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "MNT-INSITE-SPZOO" ],
    "date_created" : "2009-12-21",
    "date_updated" : "2018-09-04",
    "source" : "RIPE"
  }, {
    "aut_num" : "AS50331",
    "as_name" : "CITYNET",
    "status" : "ASSIGNED",
    "import" : [ "from AS33951 accept ANY", "from AS43435 accept ANY" ],
    "export" : [ "to AS33951 announce AS50331", "to AS43435 announce AS50331" ],
    "organization" : "ORG-CA1002-RIPE",
    "sponsoring_organization" : "ORG-ISZO9-RIPE",
    "admin_contacts" : [ "TP1292-RIPE" ],
    "tech_contacts" : [ "TP1292-RIPE" ],
    "remarks" : [ "CITYNET" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "MNT-INSITE-SPZOO" ],
    "date_created" : "2009-12-21",
    "date_updated" : "2018-09-04",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-CA1002-RIPE",
    "name" : "CITYNET Sp.z o.o.",
    "type" : "OTHER",
    "address" : [ "Staszica 9, Brzeziny" ],
    "street" : "Staszica",
    "city" : "Brzeziny",
    "country" : [ "PL" ],
    "abuse_contacts" : [ "AR25874-RIPE" ],
    "mnt_ref" : [ "MNT-INSITE-SPZOO" ],
    "mnt_by" : [ "MNT-INSITE-SPZOO" ],
    "date_created" : "2009-12-17",
    "date_updated" : "2026-05-13",
    "source" : "RIPE"
  },
  "administrative_contacts" : [ {
    "handle" : "TP1292-RIPE",
    "name" : "Tomasz Pawlowski",
    "address" : [ "FORWEB", "91-463 Lodz", "Lagiewnicka street", "no 54/56", "Poland" ],
    "street" : "Poland",
    "city" : "Lodz",
    "zip_code" : "91-463",
    "phone" : [ "+48422351000", "+48 780280700" ],
    "fax_no" : [ "+48422351001" ],
    "mnt_by" : [ "FORWEB-MNT" ],
    "date_created" : "2004-09-09",
    "date_updated" : "2024-12-02",
    "source" : "RIPE"
  } ],
  "technical_contacts" : [ {
    "handle" : "TP1292-RIPE",
    "name" : "Tomasz Pawlowski",
    "address" : [ "FORWEB", "91-463 Lodz", "Lagiewnicka street", "no 54/56", "Poland" ],
    "street" : "Poland",
    "city" : "Lodz",
    "zip_code" : "91-463",
    "phone" : [ "+48422351000", "+48 780280700" ],
    "fax_no" : [ "+48422351001" ],
    "mnt_by" : [ "FORWEB-MNT" ],
    "date_created" : "2004-09-09",
    "date_updated" : "2024-12-02",
    "source" : "RIPE"
  } ]
}

Peers

AS Number	Description	Country
AS24740	NTT DATA Business Solutions sp. z o.o.	PL
AS24482	SG.GS	SG
AS9002	RETN Limited	GB
AS6939	Hurricane Electric LLC	US
AS6204	ZET.NET IP Transit	RO
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS28917	Fiord Networks, UAB	LT
AS15694	Atman Sp. z o.o.	PL
AS56373	WAVE FIBER Sp. z.o.o.	PL

Upstreams

AS Number	Description	Country
AS24482	SG.GS	SG
AS16342	Toya sp.z.o.o	PL
AS9002	RETN Limited	GB
AS6204	ZET.NET IP Transit	RO
AS6939	Hurricane Electric LLC	US
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US