Summary
- Hostname
- —
- ASN
- AS140979
- Organization
- CHINA UNICOM Shanghai city network
- Network
- UNICOM-SH
- Range
- 223.166.0.0 - 223.167.255.255
- /24 block
- 223.167.255.0/24
- Country
- CN
- Blacklists
- 3 of 14
- Abuse contact
- [email protected]
Presence of 223.167.255.236 in blacklists
| List | Status |
|---|---|
| zen.spamhaus.org | Listed |
| dnsbl-2.uceprotect.net | Listed |
| dnsbl-3.uceprotect.net | 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 |
| 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 223.167.255.236
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '223.166.0.0 - 223.167.255.255'
% Abuse contact for '223.166.0.0 - 223.167.255.255' is '[email protected]'
inetnum: 223.166.0.0 - 223.167.255.255
netname: UNICOM-SH
descr: CHINA UNICOM Shanghai city network
descr: China Unicom
descr: No.21,Jin Rong Street,Beijing,100033
descr: P.R.China
country: CN
admin-c: CH1302-AP
tech-c: CH1302-AP
abuse-c: AC1718-AP
status: ALLOCATED PORTABLE
remarks: service provider
mnt-by: APNIC-HM
mnt-lower: MAINT-CNCGROUP-SH
mnt-routes: MAINT-CNCGROUP-RR
mnt-irt: IRT-CU-CN
last-modified: 2025-01-22T13:08:40Z
source: APNIC
irt: IRT-CU-CN
address: No.21,Financial Street
address: Beijing,100033
address: P.R.China
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: CH1302-AP
tech-c: CH1302-AP
auth: # Filtered
remarks: [email protected] was validated on 2026-08-19
mnt-by: MAINT-CNCGROUP
last-modified: 2026-08-19T00:57:22Z
source: APNIC
role: ABUSE CUCN
country: ZZ
address: No.21,Financial Street
address: Beijing,100033
address: P.R.China
phone: +000000000
e-mail: [email protected]
admin-c: CH1302-AP
tech-c: CH1302-AP
nic-hdl: AC1718-AP
remarks: Generated from irt object IRT-CU-CN
remarks: [email protected] was validated on 2026-08-19
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2026-08-20T03:22:23Z
source: APNIC
person: ChinaUnicom Hostmaster
nic-hdl: CH1302-AP
e-mail: [email protected]
address: No.21,Jin-Rong Street
address: Beijing,100033
address: P.R.China
phone: +86-10-66259764
fax-no: +86-10-66259764
country: CN
mnt-by: MAINT-CNCGROUP
last-modified: 2017-08-17T06:13:16Z
source: APNIC
% Information related to '223.167.252.0/22AS140979'
route: 223.167.252.0/22
origin: AS140979
descr: China Unicom
B811&A1218, China Unicom
No.21, Jin-Rong Street
mnt-by: MAINT-CNCGROUP-RR
last-modified: 2023-06-08T06:18:16Z
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 223.167.255.236.
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 223.167.255.236: 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