What is ASN AS204757?

ASN AS204757 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS204757?

AS204757 is listed under Reactive Markets Limited.

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?

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AS204757 Reactive Markets Limited

ASN Lookup Tool

Reactive Markets Limited reactivemarkets.com

GB 1 Routes

AS Data

AS204757

AS204757 – Reactive Markets Limited

AS Number	204757
AS Name	ReactiveMarkets
Organization	Reactive Markets Limited (org-rml21-ripe)
Country	GB
Website	reactivemarkets.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	ISP
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2026-01-21

ASN Intelligence API for production workflows

Use ASN data for AS204757 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
185.60.223.0/24	AS204757	Reactive Markets Limited	Reactive Markets Limited	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 'AS203940 - AS205662'

as-block:       AS203940 - AS205662
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:        2026-03-05T15:29:31Z
last-modified:  2026-03-05T15:29:31Z
source:         RIPE

% Information related to 'AS204757'

% Abuse contact for 'AS204757' is 'privacy@reactivemarkets.com'

aut-num:        AS204757
as-name:        ReactiveMarkets
org:            ORG-RML21-RIPE
import:         from AS16509 accept ANY
export:         to AS16509 announce AS204757
import:         from AS14618 accept ANY
export:         to AS14618 announce AS204757
admin-c:        IA7476-RIPE
tech-c:         IA7476-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         lir-uk-reactivemarkets-1-MNT
created:        2026-01-21T13:16:39Z
last-modified:  2026-07-11T09:19:37Z
source:         RIPE
descr:          -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

organisation:   ORG-RML21-RIPE
org-name:       Reactive Markets Limited
country:        GB
reg-nr:         11764649
org-type:       LIR
address:        The Workstation, Rivers Lodge, West Common
address:        AL5 2JD
address:        Harpenden
address:        UNITED KINGDOM
phone:          +442045769331
admin-c:        IA7476-RIPE
tech-c:         IA7476-RIPE
abuse-c:        AR77502-RIPE
mnt-ref:        lir-uk-reactivemarkets-1-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         lir-uk-reactivemarkets-1-MNT
created:        2025-01-07T12:30:26Z
last-modified:  2026-05-13T07:14:49Z
source:         RIPE # Filtered

role:           Infrastructure
address:        UNITED KINGDOM
address:        Harpenden
address:        AL5 2JD
address:        The Workstation, Rivers Lodge, West Common
phone:          +442045769331
nic-hdl:        IA7476-RIPE
mnt-by:         lir-uk-reactivemarkets-1-MNT
created:        2025-01-07T12:30:24Z
last-modified:  2025-01-07T12:30:25Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.123 (BUSA)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS203940 - AS205662",
    "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" : "2026-03-05",
    "date_updated" : "2026-03-05",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS204757",
    "as_name" : "ReactiveMarkets",
    "description" : [ "-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----" ],
    "status" : "ASSIGNED",
    "import" : [ "from AS16509 accept ANY", "from AS14618 accept ANY" ],
    "export" : [ "to AS16509 announce AS204757", "to AS14618 announce AS204757" ],
    "organization" : "ORG-RML21-RIPE",
    "admin_contacts" : [ "IA7476-RIPE" ],
    "tech_contacts" : [ "IA7476-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "lir-uk-reactivemarkets-1-MNT" ],
    "date_created" : "2026-01-21",
    "date_updated" : "2026-07-11",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-RML21-RIPE",
    "name" : "Reactive Markets Limited",
    "type" : "LIR",
    "address" : [ "The Workstation, Rivers Lodge, West Common", "AL5 2JD", "Harpenden", "UNITED KINGDOM" ],
    "street" : "West Common",
    "city" : "Harpenden",
    "zip_code" : "AL5 2JD",
    "country" : [ "GB" ],
    "phone" : [ "+442045769331" ],
    "admin_contacts" : [ "IA7476-RIPE" ],
    "tech_contacts" : [ "IA7476-RIPE" ],
    "abuse_contacts" : [ "AR77502-RIPE" ],
    "mnt_ref" : [ "lir-uk-reactivemarkets-1-MNT" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "lir-uk-reactivemarkets-1-MNT" ],
    "date_created" : "2025-01-07",
    "date_updated" : "2026-05-13",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  },
  "administrative_contacts" : [ {
    "handle" : "IA7476-RIPE",
    "name" : "Infrastructure",
    "address" : [ "UNITED KINGDOM", "Harpenden", "AL5 2JD", "The Workstation, Rivers Lodge, West Common" ],
    "city" : "Harpenden",
    "zip_code" : "AL5 2JD",
    "country" : "UNITED KINGDOM",
    "phone" : [ "+442045769331" ],
    "mnt_by" : [ "lir-uk-reactivemarkets-1-MNT" ],
    "date_created" : "2025-01-07",
    "date_updated" : "2025-01-07",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  } ],
  "technical_contacts" : [ {
    "handle" : "IA7476-RIPE",
    "name" : "Infrastructure",
    "address" : [ "UNITED KINGDOM", "Harpenden", "AL5 2JD", "The Workstation, Rivers Lodge, West Common" ],
    "city" : "Harpenden",
    "zip_code" : "AL5 2JD",
    "country" : "UNITED KINGDOM",
    "phone" : [ "+442045769331" ],
    "mnt_by" : [ "lir-uk-reactivemarkets-1-MNT" ],
    "date_created" : "2025-01-07",
    "date_updated" : "2025-01-07",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  } ]
}

Peers

AS Number	Description	Country
AS16509	Amazon.com, Inc.	US
AS14618	Amazon.com, Inc.	US

Upstreams

AS Number	Description	Country
AS16509	Amazon.com, Inc.	US