ASN AS23965 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23965?

AS23965 is listed under Sydney Catholic Schools.

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.

AS23965 Sydney Catholic Schools

ASN Lookup Tool

Sydney Catholic Schools scs.catholic.edu.au

AU 1 Routes

AS Data

AS23965

AS23965 – Sydney Catholic Schools

AS Number	23965
AS Name	SYDCS-AS-AP
Organization	Sydney Catholic Schools (org-ceos1-ap)
Country	AU
Website	scs.catholic.edu.au
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	EDUCATION
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS23965 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
203.26.248.0/21	AS23965	Sydney Catholic Schools	Sydney Catholic Schools	2048

Raw Whois Response

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

% Information related to 'AS23552 - AS24575'

as-block:       AS23552 - AS24575
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
remarks:        AS23889 has been transfered to AfriNIC
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:        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 'AS23955 - AS24084'

as-block:       AS23955 - AS24084
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:        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 'AS23965'

% Abuse contact for 'AS23965' is 'infraadmin@syd.catholic.edu.au'

aut-num:        AS23965
as-name:        SYDCS-AS-AP
descr:          Sydney Catholic Schools
country:        AU
org:            ORG-CEOS1-AP
admin-c:        SCS92-AP
tech-c:         SCS92-AP
abuse-c:        AS3517-AP
mnt-lower:      MAINT-AU-SYDCS
mnt-routes:     MAINT-AU-SYDCS
mnt-by:         APNIC-HM
mnt-irt:        IRT-SYDCS-AU
last-modified:  2023-04-16T09:42:50Z
source:         APNIC

irt:            IRT-SYDCS-AU
address:        38 Renwick Street
address:        Leichhardt 2040
address:        Australia
e-mail:         infraadmin@syd.catholic.edu.au
abuse-mailbox:  infraadmin@syd.catholic.edu.au
admin-c:        SCS92-AP
tech-c:         SCS92-AP
auth:           # Filtered
remarks:        infraadmin@syd.catholic.edu.au was validated on 2026-02-25
mnt-by:         MAINT-AU-SYDCS
last-modified:  2026-02-25T19:30:06Z
source:         APNIC

organisation:   ORG-CEOS1-AP
org-name:       Sydney Catholic Schools
org-type:       LIR
country:        AU
address:        L23 680 George Street
phone:          +612-9569-6111
e-mail:         billy.boskovski@scs.catholic.edu.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2026-03-01T13:05:56Z
source:         APNIC

role:           ABUSE SYDCSAU
country:        ZZ
address:        38 Renwick Street
address:        Leichhardt 2040
address:        Australia
phone:          +000000000
e-mail:         infraadmin@syd.catholic.edu.au
admin-c:        SCS92-AP
tech-c:         SCS92-AP
nic-hdl:        AS3517-AP
remarks:        Generated from irt object IRT-SYDCS-AU
remarks:        infraadmin@syd.catholic.edu.au was validated on 2026-02-25
abuse-mailbox:  infraadmin@syd.catholic.edu.au
mnt-by:         APNIC-ABUSE
last-modified:  2026-02-25T19:30:36Z
source:         APNIC

role:           Sydney Catholic Schools
address:        38 Renwick St, Leichhardt, NSW, 2040
country:        AU
phone:          +61-2-9569-6111
e-mail:         infraadmin@syd.catholic.edu.au
admin-c:        TL1148-AP
tech-c:         TL1148-AP
nic-hdl:        SCS92-AP
mnt-by:         MAINT-AU-SYDCS
last-modified:  2021-03-15T07:03:23Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS23552 - AS24575",
    "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", "AS23889 has been transfered to AfriNIC" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2009-09-29",
    "source" : "APNIC"
  }, {
    "as_block" : "AS23955 - AS24084",
    "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" : "AS23965",
    "as_name" : "SYDCS-AS-AP",
    "description" : [ "Sydney Catholic Schools" ],
    "country" : "AU",
    "organization" : "ORG-CEOS1-AP",
    "admin_contacts" : [ "SCS92-AP" ],
    "tech_contacts" : [ "SCS92-AP" ],
    "abuse_contacts" : [ "AS3517-AP" ],
    "mnt_irt" : [ "IRT-SYDCS-AU" ],
    "mnt_lower" : [ "MAINT-AU-SYDCS" ],
    "mnt_routes" : [ "MAINT-AU-SYDCS" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-04-16",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-SYDCS-AU",
    "address" : [ "38 Renwick Street", "Leichhardt 2040", "Australia" ],
    "street" : "Renwick Street",
    "zip_code" : "2040",
    "country" : "AUSTRALIA",
    "email" : [ "infraadmin@syd.catholic.edu.au" ],
    "abuse_mailbox" : [ "infraadmin@syd.catholic.edu.au" ],
    "admin_contacts" : [ "SCS92-AP" ],
    "tech_contacts" : [ "SCS92-AP" ],
    "remarks" : [ "infraadmin@syd.catholic.edu.au was validated on 2026-02-25" ],
    "mnt_by" : [ "MAINT-AU-SYDCS" ],
    "date_updated" : "2026-02-25",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-CEOS1-AP",
    "name" : "Sydney Catholic Schools",
    "type" : "LIR",
    "address" : [ "L23 680 George Street" ],
    "street" : "George Street",
    "country" : [ "AU" ],
    "email" : [ "billy.boskovski@scs.catholic.edu.au" ],
    "phone" : [ "+612-9569-6111" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2026-03-01",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "SCS92-AP",
    "name" : "Sydney Catholic Schools",
    "address" : [ "38 Renwick St, Leichhardt, NSW, 2040" ],
    "street" : "Renwick St",
    "state" : "NSW",
    "zip_code" : "2040",
    "country" : "AU",
    "email" : [ "infraadmin@syd.catholic.edu.au" ],
    "phone" : [ "+61-2-9569-6111" ],
    "admin_contacts" : [ "TL1148-AP" ],
    "tech_contacts" : [ "TL1148-AP" ],
    "mnt_by" : [ "MAINT-AU-SYDCS" ],
    "date_updated" : "2021-03-15",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "SCS92-AP",
    "name" : "Sydney Catholic Schools",
    "address" : [ "38 Renwick St, Leichhardt, NSW, 2040" ],
    "street" : "Renwick St",
    "state" : "NSW",
    "zip_code" : "2040",
    "country" : "AU",
    "email" : [ "infraadmin@syd.catholic.edu.au" ],
    "phone" : [ "+61-2-9569-6111" ],
    "admin_contacts" : [ "TL1148-AP" ],
    "tech_contacts" : [ "TL1148-AP" ],
    "mnt_by" : [ "MAINT-AU-SYDCS" ],
    "date_updated" : "2021-03-15",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AS3517-AP",
    "name" : "ABUSE SYDCSAU",
    "address" : [ "38 Renwick Street", "Leichhardt 2040", "Australia" ],
    "street" : "Renwick Street",
    "zip_code" : "2040",
    "country" : "ZZ",
    "email" : [ "infraadmin@syd.catholic.edu.au" ],
    "abuse_mailbox" : [ "infraadmin@syd.catholic.edu.au" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "SCS92-AP" ],
    "tech_contacts" : [ "SCS92-AP" ],
    "remarks" : [ "Generated from irt object IRT-SYDCS-AU", "infraadmin@syd.catholic.edu.au was validated on 2026-02-25" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-02-25",
    "source" : "APNIC",
    "addressCountry" : "AUSTRALIA"
  } ]
}

Peers

AS Number	Description	Country
AS2764	AAPT Limited	AU

Upstreams

AS Number	Description	Country
AS2764	AAPT Limited	AU

Contacts

Email Contacts

infraadmin@syd.catholic.edu.au

Abuse Contacts