211.28.4.0/22

AS4804 · Microplex PTY LTD

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Summary

Country	Australia
Domain	optus.net.au
ASN	AS4804
Parent Range	211.28.0.0/14
Registry	APNIC
ID	OPTUSINTERNET-AU

WHOIS Details

inetnum:        211.28.0.0 - 211.31.255.255
netname:        OPTUSINTERNET-AU
descr:          OPTUS INTERNET - RETAIL
descr:          INTERNET SERVICES
descr:          Chatswood, Sydney
country:        AU
org:            ORG-OIPL5-AP
admin-c:        OI3-AP
tech-c:         OI3-AP
abuse-c:        AO400-AP
status:         ALLOCATED 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-lower:      MAINT-AU-OPTUSINTERNET
mnt-routes:     MAINT-AU-OPTUSINTERNET
mnt-irt:        IRT-OPTUSINTERNET-AU
last-modified:  2024-02-05T08:16:29Z
source:         APNIC

irt:            IRT-OPTUSINTERNET-AU
address:        1 Lyonpark Rd.
address:        Macquarie Park, NSW 2113
e-mail:         abuse@optusnet.com.au
abuse-mailbox:  abuse@optusnet.com.au
admin-c:        OI3-AP
tech-c:         OI3-AP
auth:           # Filtered
remarks:        abuse@optusnet.com.au was validated on 2025-06-18
mnt-by:         MAINT-AU-OPTUSINTERNET
last-modified:  2025-06-18T01:06:29Z
source:         APNIC

organisation:   ORG-OIPL5-AP
org-name:       Optus Internet Pty Ltd
org-type:       LIR
country:        AU
address:        Building F, 3rd Floor
address:        1 Lyonpark Road
phone:          +61-2-8087-0020
fax-no:         +61-2-8085-5108
e-mail:         abuse@optusnet.com.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:50Z
source:         APNIC

role:           ABUSE OPTUSINTERNETAU
country:        ZZ
address:        1 Lyonpark Rd.
address:        Macquarie Park, NSW 2113
phone:          +000000000
e-mail:         abuse@optusnet.com.au
admin-c:        OI3-AP
tech-c:         OI3-AP
nic-hdl:        AO400-AP
remarks:        Generated from irt object IRT-OPTUSINTERNET-AU
remarks:        abuse@optusnet.com.au was validated on 2025-06-18
abuse-mailbox:  abuse@optusnet.com.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-06-18T01:06:46Z
source:         APNIC

role:           Optus Internet
address:        1 Lyonpark Rd.
address:        Macquarie Park, NSW 2113
country:        AU
phone:          +61-2-8082 7800
fax-no:         +61-2-8082 7100
e-mail:         ipadmin@optus.net.au
admin-c:        OI1-AP
tech-c:         OI1-AP
nic-hdl:        OI3-AP
notify:         ipadmin@optus.net.au
mnt-by:         MAINT-AU-OPTUSINTERNET
remarks:        send spam/abuse reports to abuse@optusnet.com.au
remarks:        please use http://wq.apnic.net/apnic-bin/whois.pl
remarks:        to identify networks before sending reports and
remarks:        always include full headers/logs.
last-modified:  2021-09-07T23:35:56Z
source:         APNIC

route:          211.28.0.0/14
origin:         AS4804
descr:          Optus Internet Pty Ltd Building F, 3rd Floor 1 Lyonpark Road
mnt-by:         MAINT-AU-OPTUSINTERNET
last-modified:  2024-02-05T08:47:53Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 211.28.4.0/22

Range	ASN	Company	Num of IPs
211.28.0.0/14	AS4804	OPTUS INTERNET - RETAIL	262,144

Nearby Ranges

BGP prefixes that overlap with 211.28.0.0/16

Range	ASN	Company	Num of IPs
211.28.0.0/14	AS4804	OPTUS INTERNET - RETAIL	262,144
211.28.192.0/19	AS4804	OPTUS INTERNET - RETAIL	8,192
211.28.224.0/19	AS4804	OPTUS INTERNET - RETAIL	8,192
211.28.32.0/19	AS4804	OPTUS INTERNET - RETAIL	8,192
211.28.64.0/19	AS4804	OPTUS INTERNET - RETAIL	8,192
211.28.128.0/19	AS4804	OPTUS INTERNET - RETAIL	8,192

Hosted domains

There are no domains currently hosted on this ASN.

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
87.212.145.86	AS50266 Odido Netherlands B.V.	4.73ms from Amsterdam, NL
71.72.30.22	AS10796 Charter Communications Inc	13.46ms from Ashburn, US
208.88.2.22	AS15644 Fresenius SE & Co. KGaA	10.43ms from Ashburn, US
68.197.145.230	AS6128 Cablevision Systems Corp.	8.82ms from New York City, US
72.188.227.198	AS33363 Charter Communications, Inc	6.70ms from Orlando, US
121.66.234.214	AS3786 LG DACOM Corporation	1.85ms from Seoul, KR
107.163.55.70	AS395776 FEDERAL ONLINE GROUP LLC	1.27ms from Seoul, KR
183.57.88.22	AS4134 CHINANET-BACKBONE	7.95ms from Shenzhen, CN
176.226.224.134	AS8369 Intersvyaz-2 JSC	3.60ms from Yekaterinburg, RU
50.122.87.166	AS5650 Frontier Communications of America, Inc.	4.59ms from Chicago, US
51.210.70.134	AS16276 OVH SAS	0.05ms from Gravelines, FR
91.180.60.134	AS5432 Proximus NV	3.90ms from Gravelines, FR
129.153.42.6	AS31898 Oracle Corporation	0.30ms from Ashburn, US
104.181.219.86	AS7018 AT&T Enterprises, LLC	1.88ms from Dallas, US
62.119.48.166	AS2119 Telenor Norge AS	0.92ms from Stockholm, SE
175.35.203.102	AS4804 Microplex PTY LTD	9.52ms from Adelaide, AU
108.142.12.118	AS8075 Microsoft Corporation	0.22ms from Amsterdam, NL
116.204.125.230	AS55990 Huawei Cloud Service data center	7.73ms from Beijing, CN
124.33.4.134	AS17506 ARTERIA Networks Corporation	1.74ms from Osaka, JP
211.2.175.182	AS2514 NTT PC Communications, Inc.	4.20ms from Osaka, JP
146.129.238.22	AS2544 King County Gov	0.57ms from Seattle, US
180.76.152.102	AS38365 Beijing Baidu Netcom Science and Technology Co., Ltd.	3.42ms from Beijing, CN
118.144.234.54	AS4808 China Unicom Beijing Province Network	5.66ms from Beijing, CN
50.192.175.118	AS7922 Comcast Cable Communications, LLC	4.60ms from Miami, US
195.213.204.118	AS6871 Plusnet	7.16ms from London, GB

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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