ASN Lookup Tool

Microsoft Singapore Pte. Ltd. microsoft.com JP JP 4 Routes

AS Data

AS45139

AS45139 – Microsoft Singapore Pte. Ltd.

AS Number 45139
AS Name MICROSOFT-AS-AP
Organization Microsoft Singapore Pte. Ltd.(org-mspl4-ap)
Country JP
Website microsoft.com
Number of IPv4 Routes 2
Number of IPv6 Routes 2
ASN type BUSINESS
Registry APNIC
Date Allocated N/A

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Use ASN data for AS45139 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
2404:f801:8020::/48 ~1×10²⁴
2404:f801:802c::/48 ~1×10²⁴
167.220.226.0/23 512
167.220.227.0/24 256

Raw Whois Response

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

% Information related to 'AS45056 - AS46079'

as-block:       AS45056 - AS46079
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:  2009-09-29T05:48:11Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
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:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS45139'

% Abuse contact for 'AS45139' is 'abuse@microsoft.com'

aut-num:        AS45139
as-name:        MICROSOFT-AS-AP
descr:          Microsoft Corp
country:        JP
import:         from AS6175 action pref=100; accept ANY
import:         from AS18084 action pref=100; accept ANY
export:         to AS6175 announce AS45139
export:         to AS18084 announce AS45139
default:        to AS18084 action pref=1; networks ANY
default:        to AS6175 action pref=2; networks ANY
remarks:        For routing problems with this ASN contact the admin-c
org:            ORG-MSPL4-AP
admin-c:        NK160-AP
tech-c:         NK160-AP
abuse-c:        AM2589-AP
notify:         naokikit@microsoft.com
mnt-lower:      MAINT-AP-MSFT
mnt-routes:     MAINT-AP-MSFT
mnt-by:         APNIC-HM
mnt-irt:        IRT-MICROSOFT-APNIC-SG
last-modified:  2020-07-07T05:09:05Z
source:         APNIC

irt:            IRT-MICROSOFT-APNIC-SG
address:        One Microsft Way
address:        Redmond, WA 98052
address:        US
e-mail:         abuse@microsoft.com
abuse-mailbox:  abuse@microsoft.com
admin-c:        MP234-AP
tech-c:         MP234-AP
auth:           # Filtered
remarks:        abuse@microsoft.com is invalid
mnt-by:         MAINT-AP-MICROSOFT
last-modified:  2025-11-18T00:26:27Z
source:         APNIC

organisation:   ORG-MSPL4-AP
org-name:       Microsoft Singapore Pte. Ltd.
country:        US
address:        One Microsoft Way
phone:          +011-425-706-8080
fax-no:         +011-425-936-7329
e-mail:         dawn.bedard@microsoft.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2020-05-27T12:56:32Z
source:         APNIC

role:           ABUSE MICROSOFTAPNICSG
country:        ZZ
address:        One Microsft Way
address:        Redmond, WA 98052
address:        US
phone:          +000000000
e-mail:         abuse@microsoft.com
admin-c:        MP234-AP
tech-c:         MP234-AP
nic-hdl:        AM2589-AP
remarks:        Generated from irt object IRT-MICROSOFT-APNIC-SG
remarks:        abuse@microsoft.com is invalid
abuse-mailbox:  abuse@microsoft.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-04T18:10:10Z
source:         APNIC

person:         Naoki Kitajima
nic-hdl:        NK160-AP
e-mail:         naokikit@microsoft.com
address:        Akasaka Garden City 4-15-1 Akasaka, Minato-ku, Tokyo 107-0052
phone:          +81-3-4512-3346
fax-no:         +81-3-4512-3416
country:        JP
mnt-by:         MAINT-AP-MSFT
last-modified:  2008-09-04T07:50:54Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-UK2)



#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       45056 - 46079
ASName:         APNIC-AS-4-BLOCK
ASHandle:       AS45056
RegDate:        2008-03-31
Updated:        2009-10-08
Comment:        These AS numbers are not registered in the ARIN database.
Comment:        For details, refer to the APNIC Whois Database via
Comment:        WHOIS.APNIC.NET or http://wq.apnic.net/apnic-bin/whois.pl    
Ref:            https://rdap.arin.net/registry/autnum/45056

ResourceLink:  https://apps.db.ripe.net/db-web-ui/query
ResourceLink:  whois.apnic.net


OrgName:        Asia Pacific Network Information Centre
OrgId:          APNIC
Address:        PO Box 3646
City:           South Brisbane
StateProv:      QLD
PostalCode:     4101
Country:        AU
RegDate:        
Updated:        2012-01-24
Ref:            https://rdap.arin.net/registry/entity/APNIC

ReferralServer:  whois://whois.apnic.net
ResourceLink:  http://wq.apnic.net/whois-search/static/search.html

OrgTechHandle: AWC12-ARIN
OrgTechName:   APNIC Whois Contact
OrgTechPhone:  +61 7 3858 3188 
OrgTechEmail:  search-apnic-not-arin@apnic.net
OrgTechRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN

OrgAbuseHandle: AWC12-ARIN
OrgAbuseName:   APNIC Whois Contact
OrgAbusePhone:  +61 7 3858 3188 
OrgAbuseEmail:  search-apnic-not-arin@apnic.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

[ JPNIC database provides information regarding IP address and ASN. Its use   ]
[ is restricted to network administration purposes. For further information,  ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output,        ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

No match!!

Reference: WHOIS servers of RIRs
  APNIC WHOIS(whois.apnic.net)
  ARIN WHOIS(whois.arin.net)
  RIPE WHOIS(apps.db.ripe.net)
  LACNIC WHOIS(whois.lacnic.net)
  AfriNIC WHOIS(whois.afrinic.net)
% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS45056 - AS46079'

as-block:       AS45056 - AS46079
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:  2009-09-29T05:48:11Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
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:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS45139'

% Abuse contact for 'AS45139' is 'abuse@microsoft.com'

aut-num:        AS45139
as-name:        MICROSOFT-AS-AP
descr:          Microsoft Corp
country:        JP
import:         from AS6175 action pref=100; accept ANY
import:         from AS18084 action pref=100; accept ANY
export:         to AS6175 announce AS45139
export:         to AS18084 announce AS45139
default:        to AS18084 action pref=1; networks ANY
default:        to AS6175 action pref=2; networks ANY
remarks:        For routing problems with this ASN contact the admin-c
org:            ORG-MSPL4-AP
admin-c:        NK160-AP
tech-c:         NK160-AP
abuse-c:        AM2589-AP
notify:         naokikit@microsoft.com
mnt-lower:      MAINT-AP-MSFT
mnt-routes:     MAINT-AP-MSFT
mnt-by:         APNIC-HM
mnt-irt:        IRT-MICROSOFT-APNIC-SG
last-modified:  2020-07-07T05:09:05Z
source:         APNIC

irt:            IRT-MICROSOFT-APNIC-SG
address:        One Microsft Way
address:        Redmond, WA 98052
address:        US
e-mail:         abuse@microsoft.com
abuse-mailbox:  abuse@microsoft.com
admin-c:        MP234-AP
tech-c:         MP234-AP
auth:           # Filtered
remarks:        abuse@microsoft.com is invalid
mnt-by:         MAINT-AP-MICROSOFT
last-modified:  2025-11-18T00:26:27Z
source:         APNIC

organisation:   ORG-MSPL4-AP
org-name:       Microsoft Singapore Pte. Ltd.
country:        US
address:        One Microsoft Way
phone:          +011-425-706-8080
fax-no:         +011-425-936-7329
e-mail:         dawn.bedard@microsoft.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2020-05-27T12:56:32Z
source:         APNIC

role:           ABUSE MICROSOFTAPNICSG
country:        ZZ
address:        One Microsft Way
address:        Redmond, WA 98052
address:        US
phone:          +000000000
e-mail:         abuse@microsoft.com
admin-c:        MP234-AP
tech-c:         MP234-AP
nic-hdl:        AM2589-AP
remarks:        Generated from irt object IRT-MICROSOFT-APNIC-SG
remarks:        abuse@microsoft.com is invalid
abuse-mailbox:  abuse@microsoft.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-04T18:10:10Z
source:         APNIC

person:         Naoki Kitajima
nic-hdl:        NK160-AP
e-mail:         naokikit@microsoft.com
address:        Akasaka Garden City 4-15-1 Akasaka, Minato-ku, Tokyo 107-0052
phone:          +81-3-4512-3346
fax-no:         +81-3-4512-3416
country:        JP
mnt-by:         MAINT-AP-MSFT
last-modified:  2008-09-04T07:50:54Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-UK2)

Parsed Whois Response

Peers

AS Number Description Country
AS55410 Vodafone Idea Ltd. VIL IN
AS6175 Cogent Communications, LLC US
AS18084 Telstra International Limited JP
AS9498 Bharti Airtel Ltd IN
AS9498 Bharti Airtel Limited IN
AS4755 Tata Communications (formerly VSNL) IN
AS4755 Tata Communications Limited IN

Upstreams

AS Number Description Country
AS55410 Vodafone Idea Ltd. VIL IN
AS9498 Bharti Airtel Limited IN
AS4755 Tata Communications Limited IN

Contacts

Email Contacts

naokikit@microsoft.com

Abuse Contacts

abuse@microsoft.com

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Frequently Asked Questions

ASN AS45139 is an Autonomous System Number used to identify a network for BGP internet routing.
AS45139 is listed under Microsoft Singapore Pte. Ltd..
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
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.