Summary
- Hostname
- d211-28-45-0.adl2.sa.optusnet.com.au
- ASN
- AS4804
- Organization
- Optus Internet Pty Ltd
- Network
- OPTUSINTERNET-AU
- Range
- 211.28.0.0 - 211.31.255.255
- /24 block
- 211.28.45.0/24
- Country
- AU
- Blacklists
- 1 of 14
- Abuse contact
- [email protected]
Presence of 211.28.45.0 in blacklists
| List | Status |
|---|---|
| zen.spamhaus.org | Listed |
| bl.spamcop.net | Not listed |
| black.junkemailfilter.com | Not listed |
| multi.surbl.org | Not listed |
| dnsbl.sorbs.net | Not listed |
| b.barracudacentral.org | Not listed |
| dnsbl.tornevall.org | Not listed |
| dnsbl.httpbl.org | Not listed |
| dnsbl-1.uceprotect.net | Not listed |
| dnsbl-2.uceprotect.net | Not listed |
| dnsbl-3.uceprotect.net | Not listed |
| v4.fullbogons.cymru.com | Not listed |
| bl.blocklist.de | Not listed |
| rbl.blockedservers.com | Not listed |
What is a blacklist (RBL)?
An RBL (Real-time Blackhole List), also known as a DNSBL (DNS-based Blackhole List), is a mechanism used to fight spam by blocking e-mails coming from sources known to send spam. RBLs are databases listing the IP addresses deemed responsible for sending unsolicited e-mail. Mail server administrators use these lists to filter incoming e-mails by checking whether the sender's IP address appears in one or more RBLs. If it does, the e-mail may be rejected or subjected to additional checks.
There are different types of RBLs, each with its own criteria for listing IP addresses. Some focus on IP addresses that send spam directly, while others list IP addresses belonging to networks known to host computers infected with malware and used as bots to send spam. RBL operators keep their lists up to date through automatic and manual contributions, and IP address owners can often request removal from a list if they believe the listing is unjustified.
WHOIS data for 211.28.45.0
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '211.28.0.0 - 211.31.255.255'
% Abuse contact for '211.28.0.0 - 211.31.255.255' is '[email protected]'
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 2026-07-01
mnt-by: MAINT-AU-OPTUSINTERNET
last-modified: 2026-07-20T06:31:44Z
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 2026-07-01
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2026-07-01T00:03:28Z
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
% Information related to '211.28.45.0/24AS4804'
route: 211.28.45.0/24
origin: AS4804
descr: Optus Internet Pty Ltd
Building F, 3rd Floor
1 Lyonpark Road
mnt-by: MAINT-AU-OPTUSINTERNET
last-modified: 2021-08-30T07:04:12Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-UK2)
Related domain names
Domains mentioned in the reverse DNS and the WHOIS of 211.28.45.0.
What is an IP address?
An IP address is a unique identifier on the internet that identifies a server or an internet user. Here the IP address is 211.28.45.0: it may be the unique address used to reach a website, or the unique address of an internet user.
An SMTP server (a server used to send e-mails) must have a reverse DNS record associated with its IP address