What is ASN AS209771?

ASN AS209771 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS209771?

AS209771 is listed under SYSN LTD.

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.

AS209771 SYSN LTD | IPGeolocation.io

ASN Lookup Tool

SYSN LTD sysn.co.uk

GB 2 Routes

AS Data

AS209771

AS209771 – SYSN LTD

AS Number	209771
AS Name	SYSN
Organization	SYSN LTD (org-sl977-ripe)
Country	GB
Website	sysn.co.uk
Number of IPv4 Routes	0
Number of IPv6 Routes	2
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2018-12-05

ASN Intelligence API for production workflows

Use ASN data for AS209771 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2a0e:46c6:4ff::/48	AS209771	SYSN LTD	SYSN LTD	~1×10²⁴
2a13:9500:44::/48	AS209771	SYSN LTD	SYSN LTD	~1×10²⁴

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 'AS208189 - AS214345'

as-block:       AS208189 - AS214345
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:        2026-02-12T14:40:05Z
last-modified:  2026-02-12T14:40:05Z
source:         RIPE

% Information related to 'AS209771'

% Abuse contact for 'AS209771' is 'abuse@sysn.co.uk'

aut-num:        AS209771
as-name:        SYSN
org:            ORG-SL977-RIPE
remarks:        For any inquiries use: noc@sysn.co.uk
remarks:        ============ TRANSIT PROVIDERS ============
remarks:        Meerfarbig
import:         from AS-MEER accept ANY
mp-import:      afi ipv6.unicast from AS-MEER accept ANY
export:         to AS-MEER announce AS-SYSN
mp-export:      afi ipv6.unicast to AS-MEER announce AS-SYSN
remarks:        Hurricane Electric
import:         from AS6939 accept ANY
mp-import:      afi ipv6.unicast from AS6939 accept ANY
export:         to AS6939 announce AS-SYSN
mp-export:      afi ipv6.unicast to AS6939 announce AS-SYSN
remarks:        Openfactory
import:         from AS-FREETRANSIT accept ANY
mp-import:      afi ipv6.unicast from AS-FREETRANSIT accept ANY
export:         to AS-FREETRANSIT announce AS-SYSN
mp-export:      afi ipv6.unicast to AS-FREETRANSIT announce AS-SYSN
remarks:        SDRmedia Verwaltungs GmbH
import:         from AS48646 accept ANY
mp-import:      afi ipv6.unicast from AS48646 accept ANY
export:         to AS48646 announce AS-SYSN
mp-export:      afi ipv6.unicast to AS48646 announce AS-SYSN
remarks:        ============== IXP ==============
remarks:        LocIX
import:         from AS-LOCIX accept ANY
mp-import:      afi ipv6.unicast from AS-LOCIX accept ANY
export:         to AS-LOCIX announce AS-SYSN
mp-export:      afi ipv6.unicast to AS-LOCIX announce AS-SYSN
remarks:        KleyReX
import:         from AS-KLEYREX-RS1 accept ANY
mp-import:      afi ipv6.unicast from AS-KLEYREX-RS1 accept ANY
export:         to AS-KLEYREX-RS1 announce AS-SYSN
mp-export:      afi ipv6.unicast to AS-KLEYREX-RS1 announce AS-SYSN
remarks:        ========== DIRECT PEERS ==========
remarks:        ================================
sponsoring-org: ORG-MM735-RIPE
admin-c:        SL13635-RIPE
tech-c:         SL13635-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SYSN-MNT
created:        2018-12-05T13:35:02Z
last-modified:  2026-02-12T12:12:22Z
source:         RIPE # Filtered

organisation:   ORG-SL977-RIPE
org-name:       SYSN LTD
country:        GB
org-type:       OTHER
address:        27 Old Gloucester Street
address:        London WC1N 3AX
address:        United Kingdom
abuse-c:        SLAD7-RIPE
admin-c:        SL13635-RIPE
tech-c:         SL13635-RIPE
mnt-ref:        zeug
mnt-ref:        MEER-MNT
mnt-ref:        MMERKEL-MNT
mnt-ref:        SYSN-MNT
mnt-by:         SYSN-MNT
created:        2020-06-29T15:57:15Z
last-modified:  2026-02-11T19:55:52Z
source:         RIPE # Filtered

person:         SYSN LTD
address:        27 Old Gloucester Street
address:        London WC1N 3AX
address:        United Kingdom
phone:          +49 (231) 58693479
nic-hdl:        SL13635-RIPE
mnt-by:         SYSN-MNT
created:        2020-05-29T14:09:52Z
last-modified:  2025-05-20T17:58:44Z
source:         RIPE # Filtered

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

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS208189 - AS214345",
    "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" : "2026-02-12",
    "date_updated" : "2026-02-12",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS209771",
    "as_name" : "SYSN",
    "status" : "ASSIGNED",
    "import" : [ "from AS-MEER accept ANY", "from AS6939 accept ANY", "from AS-FREETRANSIT accept ANY", "from AS48646 accept ANY", "from AS-LOCIX accept ANY", "from AS-KLEYREX-RS1 accept ANY" ],
    "mp_import" : [ "afi ipv6.unicast from AS-MEER accept ANY", "afi ipv6.unicast from AS6939 accept ANY", "afi ipv6.unicast from AS-FREETRANSIT accept ANY", "afi ipv6.unicast from AS48646 accept ANY", "afi ipv6.unicast from AS-LOCIX accept ANY", "afi ipv6.unicast from AS-KLEYREX-RS1 accept ANY" ],
    "export" : [ "to AS-MEER announce AS-SYSN", "to AS6939 announce AS-SYSN", "to AS-FREETRANSIT announce AS-SYSN", "to AS48646 announce AS-SYSN", "to AS-LOCIX announce AS-SYSN", "to AS-KLEYREX-RS1 announce AS-SYSN" ],
    "mp_export" : [ "afi ipv6.unicast to AS-MEER announce AS-SYSN", "afi ipv6.unicast to AS6939 announce AS-SYSN", "afi ipv6.unicast to AS-FREETRANSIT announce AS-SYSN", "afi ipv6.unicast to AS48646 announce AS-SYSN", "afi ipv6.unicast to AS-LOCIX announce AS-SYSN", "afi ipv6.unicast to AS-KLEYREX-RS1 announce AS-SYSN" ],
    "organization" : "ORG-SL977-RIPE",
    "sponsoring_organization" : "ORG-MM735-RIPE",
    "admin_contacts" : [ "SL13635-RIPE" ],
    "tech_contacts" : [ "SL13635-RIPE" ],
    "remarks" : [ "For any inquiries use: noc@sysn.co.uk", "============ TRANSIT PROVIDERS ============", "Meerfarbig", "Hurricane Electric", "Openfactory", "SDRmedia Verwaltungs GmbH", "============== IXP ==============", "LocIX", "KleyReX", "========== DIRECT PEERS ==========", "================================" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "SYSN-MNT" ],
    "date_created" : "2018-12-05",
    "date_updated" : "2026-02-12",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-SL977-RIPE",
    "name" : "SYSN LTD",
    "type" : "OTHER",
    "address" : [ "27 Old Gloucester Street", "London WC1N 3AX", "United Kingdom" ],
    "street" : "Old Gloucester Street",
    "city" : "London",
    "zip_code" : "WC1N 3AX",
    "country" : [ "GB" ],
    "admin_contacts" : [ "SL13635-RIPE" ],
    "tech_contacts" : [ "SL13635-RIPE" ],
    "abuse_contacts" : [ "SLAD7-RIPE" ],
    "mnt_ref" : [ "zeug", "MEER-MNT", "MMERKEL-MNT", "SYSN-MNT" ],
    "mnt_by" : [ "SYSN-MNT" ],
    "date_created" : "2020-06-29",
    "date_updated" : "2026-02-11",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  },
  "administrative_contacts" : [ {
    "handle" : "SL13635-RIPE",
    "name" : "SYSN LTD",
    "address" : [ "27 Old Gloucester Street", "London WC1N 3AX", "United Kingdom" ],
    "street" : "Old Gloucester Street",
    "city" : "London",
    "zip_code" : "WC1N 3AX",
    "country" : "UNITED KINGDOM",
    "phone" : [ "+49 (231) 58693479" ],
    "mnt_by" : [ "SYSN-MNT" ],
    "date_created" : "2020-05-29",
    "date_updated" : "2025-05-20",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  } ],
  "technical_contacts" : [ {
    "handle" : "SL13635-RIPE",
    "name" : "SYSN LTD",
    "address" : [ "27 Old Gloucester Street", "London WC1N 3AX", "United Kingdom" ],
    "street" : "Old Gloucester Street",
    "city" : "London",
    "zip_code" : "WC1N 3AX",
    "country" : "UNITED KINGDOM",
    "phone" : [ "+49 (231) 58693479" ],
    "mnt_by" : [ "SYSN-MNT" ],
    "date_created" : "2020-05-29",
    "date_updated" : "2025-05-20",
    "source" : "RIPE",
    "addressCountry" : "UNITED KINGDOM"
  } ]
}

Peers

AS Number	Description	Country
AS24482	SG.GS	SG
AS210937	Xiufeng Guo	DE
AS213151	Christian Elsen	DE
AS34927	iFog GmbH	CH
AS25091	IP Max SA	CH
AS6939	Hurricane Electric LLC	US
AS41051	FREETRANSIT Project	CH
AS48646	SDRmedia Verwaltungs GmbH	DE
AS34854	Maria Merkel trading as Blahaj Studio	DE
AS3214	xTom GmbH	DE

Upstreams

AS Number	Description	Country
AS25091	IP Max SA	CH
AS6939	Hurricane Electric LLC	US
AS41051	FREETRANSIT Project	CH
AS48646	SDRmedia Verwaltungs GmbH	DE
AS206499	LOCIX LIMITED	GB
AS34549	meerfarbig GmbH & Co. KG	DE