ASN AS37989 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS37989?

AS37989 is listed under DCS1 Pte. 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.

AS37989 DCS1 Pte. Ltd. | IPGeolocation.io

DCS1 Pte. Ltd. dcs1.biz

SG 3 Routes

AS Data

AS37989

AS37989 – DCS1 Pte. Ltd.

AS Number	37989
AS Name	DCS1PTELTD-AS-AP
Organization	DCS1 Pte. Ltd. (org-dpl42-ap)
Country	SG
Website	dcs1.biz
Number of IPv4 Routes	2
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	APNIC
Date Allocated	2006-03-24

ASN Intelligence API for production workflows

Use ASN data for AS37989 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
203.123.48.0/22	AS37989	DCS1 Pte. Ltd.	Main Network for DCS	1024
44.32.99.0/24	AS37989	DCS1 Pte. Ltd.	Amateur Radio Digital Communications	256
2405:fc00::/32	AS37989	DCS1 Pte. Ltd.	DCS1 SG DC	~79×10²⁷

Raw Whois Response

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS37888 - AS38911'

as-block:       AS37888 - AS38911
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2009-09-29T06:04:16Z
source:         APNIC

role:           APNIC Hostmaster
address:        PO Box 3646
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2026-08-26T00:40:00Z
source:         APNIC

% Information related to 'AS37971 - AS38085'

as-block:       AS37971 - AS38085
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2008-09-04T06:40:26Z
source:         APNIC

role:           APNIC Hostmaster
address:        PO Box 3646
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2026-08-26T00:40:00Z
source:         APNIC

% Information related to 'AS37989'

% Abuse contact for 'AS37989' is 'noc@dcs1.biz'

aut-num:        AS37989
as-name:        DCS1PTELTD-AS-AP
descr:          DCS1 Pte. Ltd.
country:        SG
org:            ORG-DPL42-AP
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
mnt-routes:     MAINT-DCS1PTELTD-SG
mnt-by:         APNIC-HM
mnt-lower:      MAINT-DCS1PTELTD-SG
mnt-irt:        IRT-DCS1PTELTD-SG
abuse-c:        AD1423-AP
last-modified:  2026-10-08T03:45:17Z
mp-export:      afi any.unicast to AS-ANY announce AS37989:AS-SG
source:         APNIC

irt:            IRT-DCS1PTELTD-SG
address:        562a Serangoon Rd, Singapore SG 218178
e-mail:         noc@dcs1.biz
abuse-mailbox:  noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
auth:           # Filtered
remarks:        noc@dcs1.biz was validated on 2026-04-22
mnt-by:         MAINT-DCS1PTELTD-SG
last-modified:  2026-10-15T16:54:01Z
source:         APNIC

organisation:   ORG-DPL42-AP
org-name:       DCS1 Pte. Ltd.
org-type:       LIR
country:        SG
address:        3 Coleman St
address:        # 03-24
phone:          +6598551208
e-mail:         noc@dcs1.biz
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2026-05-25T13:22:51Z
source:         APNIC

role:           ABUSE DCS1PTELTDSG
country:        ZZ
address:        562a Serangoon Rd, Singapore SG 218178
phone:          +000000000
e-mail:         noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
nic-hdl:        AD1423-AP
remarks:        Generated from irt object IRT-DCS1PTELTD-SG
remarks:        noc@dcs1.biz was validated on 2026-04-22
abuse-mailbox:  noc@dcs1.biz
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-22T13:13:01Z
source:         APNIC

role:           DCS1 Pte Ltd administrator
address:        194 Pandan Loop, #04-09, 128383
country:        SG
phone:          +6598551208
e-mail:         noc@dcs1.biz
admin-c:        DPLA27-AP
tech-c:         DPLA27-AP
nic-hdl:        DPLA27-AP
mnt-by:         MAINT-DCS1PTELTD-SG
last-modified:  2026-10-08T04:00:10Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS37888 - AS38911",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2009-09-29",
    "source" : "APNIC"
  }, {
    "as_block" : "AS37971 - AS38085",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS37989",
    "as_name" : "DCS1PTELTD-AS-AP",
    "description" : [ "DCS1 Pte. Ltd." ],
    "country" : "SG",
    "mp_export" : [ "afi any.unicast to AS-ANY announce AS37989:AS-SG" ],
    "organization" : "ORG-DPL42-AP",
    "admin_contacts" : [ "DPLA27-AP" ],
    "tech_contacts" : [ "DPLA27-AP" ],
    "abuse_contacts" : [ "AD1423-AP" ],
    "mnt_irt" : [ "IRT-DCS1PTELTD-SG" ],
    "mnt_lower" : [ "MAINT-DCS1PTELTD-SG" ],
    "mnt_routes" : [ "MAINT-DCS1PTELTD-SG" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2026-10-08",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-DCS1PTELTD-SG",
    "address" : [ "562a Serangoon Rd, Singapore SG 218178" ],
    "street" : "Serangoon Rd",
    "city" : "Singapore",
    "zip_code" : "218178",
    "country" : "SG",
    "email" : [ "noc@dcs1.biz" ],
    "abuse_mailbox" : [ "noc@dcs1.biz" ],
    "admin_contacts" : [ "DPLA27-AP" ],
    "tech_contacts" : [ "DPLA27-AP" ],
    "remarks" : [ "noc@dcs1.biz was validated on 2026-04-22" ],
    "mnt_by" : [ "MAINT-DCS1PTELTD-SG" ],
    "date_updated" : "2026-10-15",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-DPL42-AP",
    "name" : "DCS1 Pte. Ltd.",
    "type" : "LIR",
    "address" : [ "3 Coleman St", "# 03-24" ],
    "street" : "Coleman St # 03-24",
    "country" : [ "SG" ],
    "email" : [ "noc@dcs1.biz" ],
    "phone" : [ "+6598551208" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2026-05-25",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "DPLA27-AP",
    "name" : "DCS1 Pte Ltd administrator",
    "address" : [ "194 Pandan Loop, #04-09, 128383" ],
    "street" : "Pandan Loop #04-09",
    "country" : "SG",
    "email" : [ "noc@dcs1.biz" ],
    "phone" : [ "+6598551208" ],
    "admin_contacts" : [ "DPLA27-AP" ],
    "tech_contacts" : [ "DPLA27-AP" ],
    "mnt_by" : [ "MAINT-DCS1PTELTD-SG" ],
    "date_updated" : "2026-10-08",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "DPLA27-AP",
    "name" : "DCS1 Pte Ltd administrator",
    "address" : [ "194 Pandan Loop, #04-09, 128383" ],
    "street" : "Pandan Loop #04-09",
    "country" : "SG",
    "email" : [ "noc@dcs1.biz" ],
    "phone" : [ "+6598551208" ],
    "admin_contacts" : [ "DPLA27-AP" ],
    "tech_contacts" : [ "DPLA27-AP" ],
    "mnt_by" : [ "MAINT-DCS1PTELTD-SG" ],
    "date_updated" : "2026-10-08",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AD1423-AP",
    "name" : "ABUSE DCS1PTELTDSG",
    "address" : [ "562a Serangoon Rd, Singapore SG 218178" ],
    "street" : "Serangoon Rd",
    "city" : "Singapore",
    "zip_code" : "218178",
    "country" : "ZZ",
    "email" : [ "noc@dcs1.biz" ],
    "abuse_mailbox" : [ "noc@dcs1.biz" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "DPLA27-AP" ],
    "tech_contacts" : [ "DPLA27-AP" ],
    "remarks" : [ "Generated from irt object IRT-DCS1PTELTD-SG", "noc@dcs1.biz was validated on 2026-04-22" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-04-22",
    "source" : "APNIC",
    "addressCountry" : "SG"
  } ]
}

Peers

AS Number	Description	Country
AS211088	Xynonet	DE
AS216096	Alex Terrats Ciberseguretat SLU	AD
AS58057	Securebit AG	CH
AS207852	Yonghan Ching	MY
AS212425	Fubuki Network yuna0x0 Network	TW
AS212123	Red Panda Network	BE
AS208434	Martin Jahn	DE
AS139341	ACEVILLE PTE.LTD.	SG
AS51847	Nearoute Limited	HK
AS212518	Robin Boucquet	BE
AS61493	InterBS S.R.L. BAEHOST	AR
AS215825	Baptiste A. Ferrando	CH
AS151066	Imperial network inc	PH
AS212856	Valentin D'Emmanuele	FR
AS32590	Valve Corporation	US
AS40009	BitGravity, Inc.	US
AS63516	Transhybrid Internet Xchange	ID
AS138699	TIKTOK PTE. LTD.	SG
AS55805	MobiCom Corporation	MN
AS205088	XIAOKANG WANG	IE
AS219297	Vadim Deynichenko	RU
AS218569	Viktor Nesmeianov	RU
AS211358	Patrizio Palumbo	IT
AS207530	Timo Schaffert	DE
AS396986	Bytedance Inc.	US
AS38158	PT. Cyberindo Aditama	ID
AS32787	Akamai Technologies, Inc.	US
AS210076	Beat Joerg	CH
AS215887	Serhiy Bobrov	UA
AS209990	Diyaaeldin Moustafa trading as Karmuz	NL
AS63927	RISE ASIA TECHNOLOGY LIMITED	PH
AS30999	Emtel Ltd	MU
AS137991	Lifeway Singapore Pte. Ltd.	SG
AS218545	jean brozyna	FR
AS142631	Metro Lightspeed	MY
AS198079	Giorgio Maria Brullo	IT
AS45796	UIH / BB Connect	TH
AS401753	BIXCE Inc	VG
AS200132	Peter Paul Maria Kurstjens	NL
AS208959	SlashN Services Pte. Ltd.	SG
AS133210	EN Technologies Pte Ltd	SG
AS151326	DCConnect Communication Pte. Ltd.	SG
AS45259	BRUHAAS	BN
AS10310	Yahoo Holdings Inc.	US
AS18403	FPT Telecom Company	VN
AS215859	Hetzner Online GmbH	DE
AS11158	NTT America, Inc.	US
AS398447	OHANACRAFT, LLC	US
AS219421	Jonatan Miarecki	DE
AS142130	NICHONET Inter Continental Hosting Operation Network	US
AS10024	LGA International	SG
AS6619	SamsungSDS Inc.	KR
AS214344	Hanxun Xu	AU
AS60900	Adrian Trifonov trading as Ssmidge Technologies	CA
AS212332	Agustin Lorenzo Sempere trading as Thinco Telecom	ES
AS45899	VNPT Corp	VN
AS42	WoodyNet, Inc.	US
AS4800	PT Aplikanusa Lintasarta	ID
AS35280	F5 Networks SARL	FR
AS26533	STiBaRC	US

Upstreams

AS Number	Description	Country
AS212508	Lowhosting services of Davide Gennari	IT
AS9304	HGC Global Communications Limited	HK
AS211509	Rudakov Ihor	UA
AS6939	Hurricane Electric LLC	US
AS56300	MYREPUBLIC LIMITED	SG

Downstreams

AS Number	Description	Country
AS219412	Oxiwave Internet	GB
AS216096	Alex Terrats Ciberseguretat SLU	AD
AS207445	Vincent Maroun	LB
AS202119	Malthe Kragh Tankred	DK
AS393577	Tritan Development	US
AS199183	Arjen Olaf Essink	NL
AS215248	Bastiaan Mathijs Brink	NL
AS201398	Guwin Universal Services LLC	US
AS199776	Noah Steiniger trading as Noahprojects	DE
AS208059	Hermann Lienstromberg	DE
AS206551	Thomas Butter	DE
AS213576	Robert Weir	IE
AS212123	Red Panda Network	BE
AS205755	SDNBUCKS BV	NL
AS61493	InterBS S.R.L. BAEHOST	AR
AS215007	BOZHAN LIANG	CN
AS215825	Baptiste A. Ferrando	CH
AS215147	Schleyer EDV UG	DE
AS399992	KJTDNET	US
AS26520	HLITSERVICES LLC	US
AS62425	Mailbox Internet Hizmetleri Ltd. Sti.	TR
AS206569	Paul Henri Zimmerlin	FR
AS207149	Julien Sansonnens	CH
AS205163	Sergey Proshutinskiy	AT
AS215899	Justas Gudynas	LT
AS213586	SM Consulting Services, MB	LT
AS215296	Raoul Brouns is trading as LowPing NL	NL
AS11967	Hop179 OU	EE
AS212483	LEVEL EIGHTY SIX COMMUNICATIONS LTD	GB
AS204406	Rudolf Maduro	NL
AS219297	Vadim Deynichenko	RU
AS209552	Hurricane Electric LLC	BE
AS218569	Viktor Nesmeianov	RU
AS211358	Patrizio Palumbo	IT
AS212591	N1 Solutions B.V. trading as PLTFRMS	NL
AS209710	SNRD NETWORKS LIMITED	GB
AS208702	Joachim Ernst	DE
AS202294	Netlojik Bilgi Teknolojileri Sanayi ve Ticaret Limited Sirketi	TR
AS215887	Serhiy Bobrov	UA
AS199488	Niklas Tom Teide Fricke	DE
AS209990	Diyaaeldin Moustafa trading as Karmuz	NL
AS209862	Michal Skibicki trading as skibicki.net	PL
AS218904	NextIX UG	DE
AS198079	Giorgio Maria Brullo	IT
AS208171	CSO S.r.l.s.	IT
AS401753	BIXCE Inc	VG
AS207439	Korves.Net USA LLC	US
AS212635	Jurrian van Iersel	NL
AS200132	Peter Paul Maria Kurstjens	NL
AS142553	Airs Project Private Network Main	CN
AS150325	TSUKUDANI NETWORK	JP
AS218772	Bryan Barbolina	NL
AS34445	Robert Scheck	DE
AS398447	OHANACRAFT, LLC	US
AS152135	Cubiscomm Signal Sales, Inc.	PH
AS62787	Snark Holding Corp.	US
AS214955	Weikang Zeng	CN
AS218830	Dmitrii Pimkin	CY
AS402359	Goesel.net	US
AS208755	Thomas Ferguson	GB