ASN AS58535 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS58535?

AS58535 is listed under Colt Technology Services B.V..

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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AS58535 Colt Technology Services B.V.

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AS Data

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Parsed Whois

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Colt Technology Services B.V. colt.net

JP 0 Routes

AS Data

AS58535

AS58535 – Colt Technology Services B.V.

AS Number	58535
AS Name	COLT-AS-AP
Organization	Colt Technology Services B.V. (org-mb8-ap)
Country	JP
Website	colt.net
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Registry	APNIC
Date Allocated	N/A

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Raw Whois Response

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

% Information related to 'AS58368 - AS59391'

as-block:       AS58368 - AS59391
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:  2011-08-10T06:21:41Z
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 'AS58535'

% Abuse contact for 'AS58535' is 'abuse2@colt.net'

aut-num:        AS58535
as-name:        COLT-AS-AP
descr:          Colt Technology Services B.V.
country:        JP
org:            ORG-MB8-AP
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
abuse-c:        AP708-AP
mnt-lower:      MAINT-COLT-AP
mnt-routes:     MAINT-COLT-AP
mnt-by:         APNIC-HM
mnt-irt:        IRT-COLT-AP
last-modified:  2022-03-21T06:17:55Z
source:         APNIC

irt:            IRT-COLT-AP
address:        Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114
address:        Amsterdam, Netherlands
e-mail:         abuse2@colt.net
abuse-mailbox:  abuse2@colt.net
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
auth:           # Filtered
remarks:        abuse2@colt.net is invalid
mnt-by:         MAINT-COLT-AP
last-modified:  2026-02-11T13:09:50Z
source:         APNIC

organisation:   ORG-MB8-AP
org-name:       Colt Technology Services B.V.
org-type:       LIR
country:        NL
address:        Van der Madeweg 12-14a
address:        1114 AM Amsterdam-Duivendrecht
address:        Postbus 94014
phone:          +31-20-888-20-20
e-mail:         CapitalMarketsEngineering@colt.net
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:56Z
source:         APNIC

role:           ABUSE PRIZMNETASIAAP
address:        Beautfort House, 15 St Botolph St, London
country:        ZZ
phone:          +000000000
e-mail:         NetAdmin@marketprizm.com
admin-c:        MBNA1-AP
tech-c:         MBNA1-AP
nic-hdl:        AP708-AP
remarks:        Generated from irt object IRT-PRIZMNETASIA-AP
remarks:        netadmin@marketprizm.com was validated on 2022-02-04
abuse-mailbox:  NetAdmin@marketprizm.com
mnt-by:         APNIC-ABUSE
last-modified:  2022-02-04T10:46:58Z
source:         APNIC

role:           Colt Technology Services B.V. - Network Administrator
address:        Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114 AM
country:        NL
phone:          +31 20 888 20 20
e-mail:         CapitalMarketsEngineering@colt.net
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
nic-hdl:        CTSB2-AP
mnt-by:         MAINT-COLT-AP
last-modified:  2022-03-21T06:17:55Z
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:       58368 - 58578
ASName:         APNIC-ASNBLOCK-58368
ASHandle:       AS58368
RegDate:        2011-08-09
Updated:        2024-01-22
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/58368

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 'AS58368 - AS59391'

as-block:       AS58368 - AS59391
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:  2011-08-10T06:21:41Z
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 'AS58535'

% Abuse contact for 'AS58535' is 'abuse2@colt.net'

aut-num:        AS58535
as-name:        COLT-AS-AP
descr:          Colt Technology Services B.V.
country:        JP
org:            ORG-MB8-AP
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
abuse-c:        AP708-AP
mnt-lower:      MAINT-COLT-AP
mnt-routes:     MAINT-COLT-AP
mnt-by:         APNIC-HM
mnt-irt:        IRT-COLT-AP
last-modified:  2022-03-21T06:17:55Z
source:         APNIC

irt:            IRT-COLT-AP
address:        Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114
address:        Amsterdam, Netherlands
e-mail:         abuse2@colt.net
abuse-mailbox:  abuse2@colt.net
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
auth:           # Filtered
remarks:        abuse2@colt.net is invalid
mnt-by:         MAINT-COLT-AP
last-modified:  2026-02-11T13:09:50Z
source:         APNIC

organisation:   ORG-MB8-AP
org-name:       Colt Technology Services B.V.
org-type:       LIR
country:        NL
address:        Van der Madeweg 12-14a
address:        1114 AM Amsterdam-Duivendrecht
address:        Postbus 94014
phone:          +31-20-888-20-20
e-mail:         CapitalMarketsEngineering@colt.net
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:56Z
source:         APNIC

role:           ABUSE PRIZMNETASIAAP
address:        Beautfort House, 15 St Botolph St, London
country:        ZZ
phone:          +000000000
e-mail:         NetAdmin@marketprizm.com
admin-c:        MBNA1-AP
tech-c:         MBNA1-AP
nic-hdl:        AP708-AP
remarks:        Generated from irt object IRT-PRIZMNETASIA-AP
remarks:        netadmin@marketprizm.com was validated on 2022-02-04
abuse-mailbox:  NetAdmin@marketprizm.com
mnt-by:         APNIC-ABUSE
last-modified:  2022-02-04T10:46:58Z
source:         APNIC

role:           Colt Technology Services B.V. - Network Administrator
address:        Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114 AM
country:        NL
phone:          +31 20 888 20 20
e-mail:         CapitalMarketsEngineering@colt.net
admin-c:        CTSB2-AP
tech-c:         CTSB2-AP
nic-hdl:        CTSB2-AP
mnt-by:         MAINT-COLT-AP
last-modified:  2022-03-21T06:17:55Z
source:         APNIC

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

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS58368 - AS59391",
    "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" : "2011-08-10",
    "source" : "APNIC"
  }, {
    "as_block" : "AS58368 - AS59391",
    "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" : "2011-08-10",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS58535",
    "as_name" : "COLT-AS-AP",
    "description" : [ "Colt Technology Services B.V." ],
    "country" : "JP",
    "organization" : "ORG-MB8-AP",
    "admin_contacts" : [ "CTSB2-AP" ],
    "tech_contacts" : [ "CTSB2-AP" ],
    "abuse_contacts" : [ "AP708-AP" ],
    "mnt_irt" : [ "IRT-COLT-AP" ],
    "mnt_lower" : [ "MAINT-COLT-AP" ],
    "mnt_routes" : [ "MAINT-COLT-AP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2022-03-21",
    "source" : "APNIC"
  }, {
    "aut_num" : "AS58535",
    "as_name" : "COLT-AS-AP",
    "description" : [ "Colt Technology Services B.V." ],
    "country" : "JP",
    "organization" : "ORG-MB8-AP",
    "admin_contacts" : [ "CTSB2-AP" ],
    "tech_contacts" : [ "CTSB2-AP" ],
    "abuse_contacts" : [ "AP708-AP" ],
    "mnt_irt" : [ "IRT-COLT-AP" ],
    "mnt_lower" : [ "MAINT-COLT-AP" ],
    "mnt_routes" : [ "MAINT-COLT-AP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2022-03-21",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-COLT-AP",
    "address" : [ "Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114", "Amsterdam, Netherlands" ],
    "street" : "Amsterdam-duivendrecht",
    "city" : "Amsterdam",
    "country" : "NETHERLANDS",
    "email" : [ "abuse2@colt.net" ],
    "abuse_mailbox" : [ "abuse2@colt.net" ],
    "admin_contacts" : [ "CTSB2-AP" ],
    "tech_contacts" : [ "CTSB2-AP" ],
    "remarks" : [ "abuse2@colt.net is invalid" ],
    "mnt_by" : [ "MAINT-COLT-AP" ],
    "date_updated" : "2026-02-11",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-MB8-AP",
    "name" : "Colt Technology Services B.V.",
    "type" : "LIR",
    "address" : [ "Van der Madeweg 12-14a", "1114 AM Amsterdam-Duivendrecht", "Postbus 94014" ],
    "street" : "Am Amsterdam-duivendrecht",
    "zip_code" : "1114",
    "country" : [ "NL" ],
    "email" : [ "CapitalMarketsEngineering@colt.net" ],
    "phone" : [ "+31-20-888-20-20" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "CTSB2-AP",
    "name" : "Colt Technology Services B.V. - Network Administrator",
    "address" : [ "Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114 AM" ],
    "street" : "Van Der Madeweg",
    "city" : "Amsterdam-duivendrecht",
    "zip_code" : "1114",
    "country" : "NL",
    "email" : [ "CapitalMarketsEngineering@colt.net" ],
    "phone" : [ "+31 20 888 20 20" ],
    "admin_contacts" : [ "CTSB2-AP" ],
    "tech_contacts" : [ "CTSB2-AP" ],
    "mnt_by" : [ "MAINT-COLT-AP" ],
    "date_updated" : "2022-03-21",
    "source" : "APNIC",
    "addressCountry" : "AM"
  } ],
  "technical_contacts" : [ {
    "handle" : "CTSB2-AP",
    "name" : "Colt Technology Services B.V. - Network Administrator",
    "address" : [ "Van der Madeweg 12-14a, Amsterdam-Duivendrecht 1114 AM" ],
    "street" : "Van Der Madeweg",
    "city" : "Amsterdam-duivendrecht",
    "zip_code" : "1114",
    "country" : "NL",
    "email" : [ "CapitalMarketsEngineering@colt.net" ],
    "phone" : [ "+31 20 888 20 20" ],
    "admin_contacts" : [ "CTSB2-AP" ],
    "tech_contacts" : [ "CTSB2-AP" ],
    "mnt_by" : [ "MAINT-COLT-AP" ],
    "date_updated" : "2022-03-21",
    "source" : "APNIC",
    "addressCountry" : "AM"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AP708-AP",
    "name" : "ABUSE PRIZMNETASIAAP",
    "address" : [ "Beautfort House, 15 St Botolph St, London" ],
    "street" : "St Botolph St",
    "city" : "London",
    "country" : "ZZ",
    "email" : [ "NetAdmin@marketprizm.com" ],
    "abuse_mailbox" : [ "NetAdmin@marketprizm.com" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "MBNA1-AP" ],
    "tech_contacts" : [ "MBNA1-AP" ],
    "remarks" : [ "Generated from irt object IRT-PRIZMNETASIA-AP", "netadmin@marketprizm.com was validated on 2022-02-04" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2022-02-04",
    "source" : "APNIC"
  } ]
}