211.28.128.0/19

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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        OI3-AP
tech-c:         OI3-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-06-18
mnt-by:         MAINT-AU-OPTUSINTERNET
last-modified:  2025-11-18T00:26:27Z
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:         [email protected]
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:         [email protected]
admin-c:        OI3-AP
tech-c:         OI3-AP
nic-hdl:        AO400-AP
remarks:        Generated from irt object IRT-OPTUSINTERNET-AU
remarks:        [email protected] was validated on 2025-06-18
abuse-mailbox:  [email protected]
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:         [email protected]
admin-c:        OI1-AP
tech-c:         OI1-AP
nic-hdl:        OI3-AP
notify:         [email protected]
mnt-by:         MAINT-AU-OPTUSINTERNET
remarks:        send spam/abuse reports to [email protected]
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 211.28.128.0/19

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

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
211.28.139.25	piccolo.id.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

Read more

Pingable IPs

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

IP Address	ASN	Details
211.28.129.132	AS4804 Microplex PTY LTD	`0.18ms` from Sydney, AU
211.28.128.16	AS4804 Microplex PTY LTD	`0.66ms` from Brisbane, AU
211.28.134.3	AS4804 Microplex PTY LTD	`23.93ms` from Melbourne, AU
211.28.132.4	AS4804 Microplex PTY LTD	`1.20ms` from Brisbane, AU
211.28.138.1	AS4804 Microplex PTY LTD	`1.05ms` from Sydney, AU
211.28.131.163	AS4804 Microplex PTY LTD	`0.30ms` from Perth, AU
211.28.130.86	AS4804 Microplex PTY LTD	`0.87ms` 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
47.37.220.67	AS20115 Charter Communications LLC	`13.42ms` from Atlanta, US
120.12.31.83	AS4837 CHINA UNICOM China169 Backbone	`6.94ms` from Beijing, CN
181.101.254.115	AS7303 Telecom Argentina S.A.	`11.76ms` from Buenos Aires, AR
2.107.209.83	AS3292 TDC Holding A/S	`2.23ms` from Copenhagen, DK
93.205.251.147	AS3320 Deutsche Telekom AG	`4.38ms` from Duesseldorf, DE
91.219.5.51	AS48366 Inforoom Ltd.	`12.30ms` from Moscow, RU
116.147.76.67	AS4837 CHINA UNICOM China169 Backbone	`5.80ms` from Nanjing, CN
98.82.36.35	AS14618 Amazon.com, Inc.	`0.64ms` from Reston, US
114.42.254.211	AS3462 Data Communication Business Group	`1.54ms` from Taichung, TW
20.101.222.83	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
222.162.123.99	AS4837 CHINA UNICOM China169 Backbone	`9.35ms` from Changchun, CN
66.97.145.3	AS7018 AT&T Enterprises, LLC	`0.67ms` from Dallas, US
59.98.164.115	AS9829 National Internet Backbone	`9.87ms` from Delhi, IN
62.237.3.179	AS16086 DNA Oyj	`1.27ms` from Helsinki, FI
14.173.84.115	AS45899 VNPT Corp	`2.52ms` from Ho Chi Minh City, VN
103.152.100.51	AS151330 PLAY BROADBAND (PRIVATE) LIMITED	`16.18ms` from Karachi, PK
79.156.104.67	AS3352 TELEFONICA DE ESPANA S.A.U.	`9.15ms` from Madrid, ES
4.198.138.51	AS8075 Microsoft Corporation	`0.42ms` from Melbourne, AU
112.25.53.211	AS56046 China Mobile communications corporation	`2.13ms` from Nanjing, CN
69.201.233.83	AS12271 Charter Communications Inc	`4.50ms` from New York City, US
69.114.83.115	AS6128 Cablevision Systems Corp.	`3.66ms` from Piscataway, US
142.58.18.3	AS11105 Simon Fraser University	`4.27ms` from Seattle, US
203.238.187.83	AS9286 KINX	`0.42ms` from Seoul, KR
208.85.73.195	AS11999 REJIS Commission	`0.49ms` from St. Louis, US
58.87.235.51	AS2527 Sony Network Communications Inc.	`2.50ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 -f2 -m7 211.28.156.61

traceroute to 211.28.156.61 (211.28.156.61): 7 hops max, 52 byte packets

2 [AS50837] 208.111.57.3 0.568 ms

3 *

4 [AS40300] 206.197.210.209 0.418 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Honolulu, US

On December 14th 2025

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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