Summary
- Hostname
- —
- ASN
- AS45090
- Organization
- Shenzhen Tencent Computer Systems Company Limited
- Network
- TENCENT-NET-AP
- Range
- 121.51.0.0 - 121.51.255.255
- /24 block
- 121.51.7.0/24
- Country
- CN
- Blacklists
- 0 of 14
- Abuse contact
- [email protected]
Presence of 121.51.7.255 in blacklists
| List | Status |
|---|---|
| zen.spamhaus.org | Not 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 121.51.7.255
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '121.51.0.0 - 121.51.255.255'
% Abuse contact for '121.51.0.0 - 121.51.255.255' is '[email protected]'
inetnum: 121.51.0.0 - 121.51.255.255
netname: TENCENT-NET-AP
descr: Shenzhen Tencent Computer Systems Company Limited
descr: Tencent Building, Kejizhongyi Avenue, Hi-techPark,
descr: Nanshan District,Shenzhen
country: CN
admin-c: LY3373-AP
tech-c: XJ1742-AP
abuse-c: AT1244-AP
status: ALLOCATED PORTABLE
mnt-by: MAINT-CNNIC-AP
mnt-lower: MAINT-CNNIC-AP
mnt-routes: MAINT-CNNIC-AP
mnt-irt: IRT-TENCENT-NET-AP-CN
last-modified: 2023-11-28T01:01:35Z
source: APNIC
irt: IRT-TENCENT-NET-AP-CN
address: Tencent Building, Kejizhongyi Avenue, Hi-techPark,Nanshan District,Shenzhen
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: STCS2-AP
tech-c: STCS2-AP
auth: # Filtered
remarks: [email protected] was validated on 2026-05-15
remarks: [email protected] was validated on 2026-08-27
mnt-by: MAINT-TENCENT-NET-AP-CN
last-modified: 2026-08-27T11:33:35Z
source: APNIC
role: ABUSE TENCENTNETAPCN
country: ZZ
address: Tencent Building, Kejizhongyi Avenue, Hi-techPark,Nanshan District,Shenzhen
phone: +000000000
e-mail: [email protected]
admin-c: STCS2-AP
tech-c: STCS2-AP
nic-hdl: AT1244-AP
remarks: Generated from irt object IRT-TENCENT-NET-AP-CN
remarks: [email protected] was validated on 2026-05-15
remarks: [email protected] was validated on 2026-08-27
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2026-08-27T11:34:05Z
source: APNIC
person: Li Yuan
address: Tencent Building, Kejizhongyi Avenue,
address: Hi-techPark,Nanshan District,Shenzhen
country: CN
phone: +86-010-82155623
fax-no: +86-0755-83257688
e-mail: [email protected]
nic-hdl: LY3373-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2014-01-27T08:38:01Z
source: APNIC
person: Xiao Jilong
address: Tencent Building, Kejizhongyi Avenue,
address: Hi-techPark,Nanshan District,Shenzhen
country: CN
phone: +86-15013538285
fax-no: +86-0755-83257688
e-mail: [email protected]
nic-hdl: XJ1742-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2014-01-27T08:38:02Z
source: APNIC
% Information related to '121.51.0.0/16AS45090'
route: 121.51.0.0/16
descr: Shenzhen Tencent Computer Systems Company Limited
country: CN
origin: AS45090
notify: [email protected]
mnt-by: MAINT-CNNIC-AP
last-modified: 2016-01-21T09:24:01Z
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 121.51.7.255.
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 121.51.7.255: 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