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.

AS51221 LMAX Limited | IPGeolocation.io

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

LMAX Limited lmax.com

GB 1 Routes

AS Data

AS51221

AS51221 – LMAX Limited

AS Number	51221
AS Name	LMAX-HOSTING
Organization	LMAX Limited (org-ll142-ripe)
Country	GB
Website	lmax.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2016-01-05

ASN Intelligence API for production workflows

Use ASN data for AS51221 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
185.34.164.0/22	AS41477	LMAX Limited	LMAX Limited	1024

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 'AS51221'

% Abuse contact for 'AS51221' is 'network-abuse@lmax.com'

aut-num:        AS51221
as-name:        LMAX-HOSTING
org:            ORG-LL142-RIPE
remarks:        === LMAX-UK
import:         from AS41477 accept ANY
export:         to AS41477 announce AS51221
remarks:        === LMAX-USA
import:         from AS63428 accept ANY
export:         to AS63428 announce AS51221
remarks:        === Digital-Prox
import:         from AS47675 accept ANY
export:         to AS47675 announce AS51221
admin-c:        RD3425-RIPE
tech-c:         RD3425-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS41477-MNT
created:        2016-01-05T13:04:39Z
last-modified:  2024-09-05T11:05:20Z
source:         RIPE

organisation:   ORG-LL142-RIPE
org-name:       LMAX Limited
country:        GB
org-type:       LIR
address:        1A Nicholas Road
address:        W11 4AN
address:        London
address:        UNITED KINGDOM
phone:          +442031922501
fax-no:         +442031922572
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AS41477-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS41477-MNT
abuse-c:        LMAX1-RIPE
created:        2013-07-08T09:15:36Z
last-modified:  2024-09-05T11:06:09Z
source:         RIPE # Filtered
admin-c:        RD3425-RIPE

person:         Ralf Duken
address:        LMAX Exchange
address:        Yellow Building
address:        1a Nicholas Rd
address:        London
address:        W11 4AN
address:        UK
phone:          +44 20 3192 2501
nic-hdl:        RD3425-RIPE
mnt-by:         AS41477-MNT
created:        2009-08-24T15:06:29Z
last-modified:  2012-12-20T13:53:41Z
source:         RIPE

% 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" : "AS51221",
    "as_name" : "LMAX-HOSTING",
    "status" : "ASSIGNED",
    "import" : [ "from AS41477 accept ANY", "from AS63428 accept ANY", "from AS47675 accept ANY" ],
    "export" : [ "to AS41477 announce AS51221", "to AS63428 announce AS51221", "to AS47675 announce AS51221" ],
    "organization" : "ORG-LL142-RIPE",
    "admin_contacts" : [ "RD3425-RIPE" ],
    "tech_contacts" : [ "RD3425-RIPE" ],
    "remarks" : [ "=== LMAX-UK", "=== LMAX-USA", "=== Digital-Prox" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "AS41477-MNT" ],
    "date_created" : "2016-01-05",
    "date_updated" : "2024-09-05",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-LL142-RIPE",
    "name" : "LMAX Limited",
    "type" : "LIR",
    "address" : [ "1A Nicholas Road", "W11 4AN", "London", "UNITED KINGDOM" ],
    "street" : "Nicholas Road",
    "city" : "London",
    "zip_code" : "W11 4AN",
    "country" : [ "GB" ],
    "phone" : [ "+442031922501" ],
    "fax_no" : [ "+442031922572" ],
    "admin_contacts" : [ "RD3425-RIPE" ],
    "abuse_contacts" : [ "LMAX1-RIPE" ],
    "mnt_ref" : [ "RIPE-NCC-HM-MNT", "AS41477-MNT" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "AS41477-MNT" ],
    "date_created" : "2013-07-08",
    "date_updated" : "2024-09-05",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  },
  "administrative_contacts" : [ {
    "handle" : "RD3425-RIPE",
    "name" : "Ralf Duken",
    "address" : [ "LMAX Exchange", "Yellow Building", "1a Nicholas Rd", "London", "W11 4AN", "UK" ],
    "street" : "Nicholas Rd",
    "city" : "London",
    "zip_code" : "W11 4AN",
    "country" : "UK",
    "phone" : [ "+44 20 3192 2501" ],
    "mnt_by" : [ "AS41477-MNT" ],
    "date_created" : "2009-08-24",
    "date_updated" : "2012-12-20",
    "source" : "RIPE",
    "addressCountry" : "UK"
  } ],
  "technical_contacts" : [ {
    "handle" : "RD3425-RIPE",
    "name" : "Ralf Duken",
    "address" : [ "LMAX Exchange", "Yellow Building", "1a Nicholas Rd", "London", "W11 4AN", "UK" ],
    "street" : "Nicholas Rd",
    "city" : "London",
    "zip_code" : "W11 4AN",
    "country" : "UK",
    "phone" : [ "+44 20 3192 2501" ],
    "mnt_by" : [ "AS41477-MNT" ],
    "date_created" : "2009-08-24",
    "date_updated" : "2012-12-20",
    "source" : "RIPE",
    "addressCountry" : "UK"
  } ]
}

Peers

AS Number	Description	Country
AS63428	LMAX USA Inc	US
AS41477	LMAX Limited	GB
AS47675	LMAX Digital Group Limited	JE

Upstreams

AS Number	Description	Country
AS41477	LMAX Limited	GB

Frequently Asked Questions

What is ASN AS51221?

ASN AS51221 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS51221?

AS51221 is listed under LMAX Limited.

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.