1. All IP Ranges
  2. 203.0.0.0/8
  3. 203.33.0.0/16
  4. AS24510  | 203.33.133.0/24

203.33.133.0/24

AS24510  ·  Optus Customer Network

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Summary

Country Australia
Domain holmesglen.edu.au
ASN AS24510
Registry APNIC
ID HOLMESGLEN-AU

WHOIS Details

inetnum:        203.33.133.0 - 203.33.133.255
netname:        HOLMESGLEN-AU
descr:          HOLMESGLEN INSTITUTE OF TAFE
country:        AU
org:            ORG-HIOT1-AP
admin-c:        HNA8-AP
tech-c:         HNA8-AP
abuse-c:        AH1068-AP
status:         ASSIGNED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-routes:     MAINT-HOLMESGLEN-AU
mnt-irt:        IRT-HOLMESGLEN-AU
last-modified:  2023-02-06T05:59:22Z
source:         APNIC

irt:            IRT-HOLMESGLEN-AU
address:        PoBox 42, chadstone, victoria 3148
e-mail:         netops@holmesglen.edu.au
abuse-mailbox:  netops@holmesglen.edu.au
admin-c:        HNA8-AP
tech-c:         HNA8-AP
auth:           # Filtered
remarks:        netops@holmesglen.edu.au was validated on 2026-01-04
mnt-by:         MAINT-HOLMESGLEN-AU
last-modified:  2026-01-04T21:54:58Z
source:         APNIC

organisation:   ORG-HIOT1-AP
org-name:       HOLMESGLEN INSTITUTE OF TAFE
org-type:       LIR
country:        AU
address:        Corner Batesford & Warrigal Roads Chadstone, Victoria, 3148
phone:          +61-419-545-662
e-mail:         system.admin@holmesglen.edu.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:16:03Z
source:         APNIC

role:           ABUSE HOLMESGLENAU
country:        ZZ
address:        PoBox 42, chadstone, victoria 3148
phone:          +000000000
e-mail:         netops@holmesglen.edu.au
admin-c:        HNA8-AP
tech-c:         HNA8-AP
nic-hdl:        AH1068-AP
remarks:        Generated from irt object IRT-HOLMESGLEN-AU
remarks:        netops@holmesglen.edu.au was validated on 2026-01-04
abuse-mailbox:  netops@holmesglen.edu.au
mnt-by:         APNIC-ABUSE
last-modified:  2026-01-04T21:55:34Z
source:         APNIC

role:           HOLMESGLEN  - network administrator
address:        PoBox 42, chadstone, victoria 3148
country:        AU
phone:          +61 3 9564 1925
e-mail:         netops@holmesglen.edu.au
admin-c:        HNA8-AP
tech-c:         HNA8-AP
nic-hdl:        HNA8-AP
mnt-by:         MAINT-HOLMESGLEN-AU
last-modified:  2012-09-10T04:51:40Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.33.0.0/16

Range ASN Company Num of IPs
203.33.160.0/21 AS7545 iiNet Limited 2,048
203.33.252.0/23 AS4826 Netway Technologies Pty Ltd 512
203.33.158.0/23 AS135089 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.202.0/23 AS134761 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.158.0/23 AS58466 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.108.0/23 AS9266 Fiveways International Limited 512
203.33.206.0/23 AS58519 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.58.0/23 AS9266 Fiveways International Limited 512
203.33.60.0/23 AS9268 Over The Wire Pty Ltd 512
203.33.224.0/23 AS58519 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.214.0/23 AS58519 CHINANET FUJIAN PROVINCE NETWORK 512
203.33.57.0/24 AS151129 SYNCHRONY INTERNATIONAL SERVICES PVT LTD 256
203.33.77.0/24 AS153467 Glen Eira City Council 256
203.33.72.0/24 AS153472 William Branwhite Clarke College 256
203.33.231.0/24 AS17378 Aylie Brutman 256
203.33.150.0/24 AS17766 Nexon Asia Pacific Pty Ltd 256
203.33.171.0/24 AS18111 Bytecard PTY LTD 256
203.33.70.0/24 AS210371 Mobileye Vision Technologies Ltd 256
203.33.10.0/24 AS23764 Chinatelecom Next Carrying Network backbone 256
203.33.8.0/24 AS23764 Chinatelecom Next Carrying Network backbone 256
203.33.9.0/24 AS23764 Chinatelecom Next Carrying Network backbone 256
203.33.65.0/24 AS2764 PG Lion ReSources Aust Pty Ltd 256
203.33.254.0/24 AS38195 SUPERLOOP (AUSTRALIA) PTY LTD 256
203.33.121.0/24 AS38220 Amaze Intelligence Pty Ltd 256
203.33.196.0/24 AS38291 BPS Corporation 256
203.33.236.0/24 AS38611 Bendigo Community Telco Limited 256
203.33.45.0/24 AS399735 LakeLand Internet LLC 256
203.33.145.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.156.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.174.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.32.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.63.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.64.0/24 AS4134 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.128.0/24 AS45158 ISW Technology Pty Ltd 256
203.33.240.0/24 AS45581 Infonet Thailand 256
203.33.102.0/24 AS45852 Bendigo Bank 256
203.33.241.0/24 AS4739 iiNet Limited 256
203.33.255.0/24 AS4739 iiNet Limited 256
203.33.185.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.200.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.21.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.226.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.26.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.4.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.7.0/24 AS4809 CHINANET FUJIAN PROVINCE NETWORK 256
203.33.223.0/24 AS4826 Christopher Kevin Hurley 256
203.33.38.0/24 AS48448 Embark Studios AB 256
203.33.239.0/24 AS58061 MISTIC-AU 256
203.33.67.0/24 AS58777 CHINANET FUJIAN PROVINCE NETWORK 256

Hosted domains

There are 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.33.133.251 healthskills.com.au 1
203.33.133.242 mri.edu.au 1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity
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Pingable IPs

3 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.33.133.70 AS24510 Optus Customer Network 0.80ms from Melbourne, AU

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
154.243.137.24 AS36947 Telecom Algeria 10.78ms from Algiers, DZ
196.114.141.72 AS36925 MEDITELECOM 13.42ms from Casablanca, MA
172.236.93.152 AS63949 Akamai Connected Cloud 0.80ms from Chennai, IN
106.52.34.136 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.01ms from Guangzhou, CN
20.77.121.40 AS8075 Microsoft Corporation 0.20ms from London, GB
51.142.224.136 AS8075 Microsoft Corporation 0.18ms from London, GB
184.31.8.200 AS20940 Akamai International B.V. 0.12ms from Madrid, ES
75.72.202.104 AS7922 Comcast Cable Communications, LLC 4.24ms from Minneapolis, US
165.106.16.56 AS3795 Bryn Mawr College 4.60ms from New York City, US
176.153.135.24 AS5410 Bouygues Telecom SA 7.12ms from Paris, FR
68.134.230.216 AS701 Verizon Business 4.56ms from Philadelphia, US
97.115.136.200 AS209 CenturyLink Communications, LLC 1.97ms from Portland, US
52.90.109.232 AS14618 Amazon.com, Inc. 0.42ms from Reston, US
109.104.231.184 AS48500 Irpinia Net-Com SRL 15.83ms from Rome, IT
104.182.14.8 AS7018 AT&T Enterprises, LLC 4.05ms from San Antonio, US
187.169.64.248 AS8151 UNINET 3.73ms from Santiago de Queretaro, MX
175.194.136.8 AS4766 Korea Telecom 2.32ms from Seoul, KR
153.160.241.104 AS4713 NTT DOCOMO BUSINESS,Inc. 3.16ms from Tokyo, JP
24.150.226.168 AS7992 Cogeco Connexion Inc. 5.72ms from Toronto, CA
174.130.102.232 AS7029 Windstream Communications LLC 9.76ms from Atlanta, US
151.102.106.184 AS32104 Wellmont Health System 13.85ms from Charlotte, US
31.32.237.88 AS5410 Bouygues Telecom SA 7.95ms from Duesseldorf, DE
95.138.86.104 AS21351 Canal + Telecom SAS 7.24ms from Le Lamentin, MQ
157.241.56.184 AS16509 Amazon.com, Inc. 0.11ms from Manama, BH
3.110.82.8 AS16509 Amazon.com, Inc. 0.26ms from Mumbai, IN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f5 203.33.133.1
traceroute to 203.33.133.1 (203.33.133.1): 64 hops max, 52 byte packets
5 [] 202.77.90.10 0.571 ms
7 [AS24510] 203.33.133.1 1.697 ms
Measurement taken from IPinfo ProbeNet in Melbourne, AU
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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