ASN AS50510 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS50510?

AS50510 is listed under Cancer Research UK.

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.

AS50510 Cancer Research UK | IPGeolocation.io

ASN Lookup Tool

Cancer Research UK ncuk.net

GB 5 Routes

AS Data

AS50510

AS50510 – Cancer Research UK

AS Number	50510
AS Name	CRUK-AS
Organization	Cancer Research UK (org-cru1-ripe)
Country	GB
Website	ncuk.net
Number of IPv4 Routes	5
Number of IPv6 Routes	0
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2010-02-01

ASN Intelligence API for production workflows

Use ASN data for AS50510 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
143.65.196.0/24	AS50510	Cancer Research UK	Cancer Research UK	256
143.65.200.0/24	AS50510	Cancer Research UK	Cancer Research UK	256
143.65.192.0/24	AS50510	Cancer Research UK	Cancer Research UK	256
143.65.201.0/24	AS50510	Cancer Research UK	Cancer Research UK	256
143.65.206.0/24	AS50510	Cancer Research UK	Cancer Research UK	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 'AS50510'

% Abuse contact for 'AS50510' is 'abuse@ncuk.net'

aut-num:        AS50510
as-name:        CRUK-AS
org:            ORG-CRU1-RIPE
import:         from AS8220 accept ANY
import:         from AS6461 accept ANY
import:         from AS3561 accept ANY
export:         to AS8220 announce AS-CRUK
export:         to AS6461 announce AS-CRUK
export:         to AS3561 announce AS-CRUK
admin-c:        SB11893-RIPE
tech-c:         SK4723-RIPE
tech-c:         SS12595-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CRUK-MNT
mnt-by:         NETCONNEX-MNT
created:        2010-02-01T15:43:03Z
last-modified:  2018-09-04T10:48:15Z
source:         RIPE
sponsoring-org: ORG-NBL2-RIPE

organisation:   ORG-CRU1-RIPE
org-name:       Cancer Research UK
country:        GB
org-type:       OTHER
address:        2 Redman Place
address:        Stratford
address:        London
address:        E20 1JQ
address:        United Kingdom
abuse-c:        AR23982-RIPE
mnt-ref:        cruk-mnt
mnt-by:         cruk-mnt
created:        2009-11-27T10:30:57Z
last-modified:  2026-04-17T10:22:03Z
source:         RIPE # Filtered

person:         Abid Ali
address:        Cancer Research UK
address:        2 Redman Place
address:        Stratford
address:        London
address:        E20 1JQ
phone:          +44 (0) 203 469 6622
nic-hdl:        SB11893-RIPE
mnt-by:         CRUK-MNT
created:        2010-04-16T09:56:39Z
last-modified:  2021-01-28T13:13:59Z
source:         RIPE

person:         Abid Ali
address:        2 Redman Place
address:        Stratford
address:        London
address:        E20 1JQ
phone:          +44 (0)203 469 6622
nic-hdl:        SK4723-RIPE
mnt-by:         CRUK-MNT
created:        2009-10-19T08:50:59Z
last-modified:  2021-01-28T13:16:53Z
source:         RIPE

person:         Abid Ali
address:        2 Redman Place
address:        Stratford
address:        London
address:        E20 1JQ
phone:          +44 (0) 203 469 56622
nic-hdl:        SS12595-RIPE
mnt-by:         cruk-mnt
created:        2009-10-27T10:30:55Z
last-modified:  2021-01-28T13:19:52Z
source:         RIPE

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

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"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS50510",
    "as_name" : "CRUK-AS",
    "status" : "ASSIGNED",
    "import" : [ "from AS8220 accept ANY", "from AS6461 accept ANY", "from AS3561 accept ANY" ],
    "export" : [ "to AS8220 announce AS-CRUK", "to AS6461 announce AS-CRUK", "to AS3561 announce AS-CRUK" ],
    "organization" : "ORG-CRU1-RIPE",
    "sponsoring_organization" : "ORG-NBL2-RIPE",
    "admin_contacts" : [ "SB11893-RIPE" ],
    "tech_contacts" : [ "SK4723-RIPE", "SS12595-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "CRUK-MNT", "NETCONNEX-MNT" ],
    "date_created" : "2010-02-01",
    "date_updated" : "2018-09-04",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-CRU1-RIPE",
    "name" : "Cancer Research UK",
    "type" : "OTHER",
    "address" : [ "2 Redman Place", "Stratford", "London", "E20 1JQ", "United Kingdom" ],
    "street" : "Redman Place",
    "city" : "London",
    "zip_code" : "E20 1JQ",
    "country" : [ "GB" ],
    "abuse_contacts" : [ "AR23982-RIPE" ],
    "mnt_ref" : [ "cruk-mnt" ],
    "mnt_by" : [ "cruk-mnt" ],
    "date_created" : "2009-11-27",
    "date_updated" : "2026-04-17",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  },
  "administrative_contacts" : [ {
    "handle" : "SB11893-RIPE",
    "name" : "Abid Ali",
    "address" : [ "Cancer Research UK", "2 Redman Place", "Stratford", "London", "E20 1JQ" ],
    "street" : "Redman Place",
    "city" : "London",
    "zip_code" : "E20 1JQ",
    "phone" : [ "+44 (0) 203 469 6622" ],
    "mnt_by" : [ "CRUK-MNT" ],
    "date_created" : "2010-04-16",
    "date_updated" : "2021-01-28",
    "source" : "RIPE"
  } ],
  "technical_contacts" : [ {
    "handle" : "SK4723-RIPE",
    "name" : "Abid Ali",
    "address" : [ "2 Redman Place", "Stratford", "London", "E20 1JQ" ],
    "street" : "Redman Place",
    "city" : "London",
    "zip_code" : "E20 1JQ",
    "phone" : [ "+44 (0)203 469 6622" ],
    "mnt_by" : [ "CRUK-MNT" ],
    "date_created" : "2009-10-19",
    "date_updated" : "2021-01-28",
    "source" : "RIPE"
  }, {
    "handle" : "SS12595-RIPE",
    "name" : "Abid Ali",
    "address" : [ "2 Redman Place", "Stratford", "London", "E20 1JQ" ],
    "street" : "Redman Place",
    "city" : "London",
    "zip_code" : "E20 1JQ",
    "phone" : [ "+44 (0) 203 469 56622" ],
    "mnt_by" : [ "cruk-mnt" ],
    "date_created" : "2009-10-27",
    "date_updated" : "2021-01-28",
    "source" : "RIPE"
  } ]
}

Peers

AS Number	Description	Country
AS25180	Exponential-E Ltd.	GB
AS8220	COLT Technology Services Group Limited	GB
AS3561	CenturyLink Communications, LLC	US
AS25180	Exponential E Ltd.	GB
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS25180	Exponential E Ltd.	GB
AS6461	Zayo Bandwidth	US