Summary
- Hostname
- —
- ASN
- —
- Organization
- Beijing CNISP Technology Co., Ltd
- Network
- CNISP-UNION
- Range
- 49.4.128.0 - 49.4.255.255
- /24 block
- 49.4.131.0/24
- Country
- CN
- Blacklists
- 1 of 14
- Abuse contact
- [email protected]
Presence of 49.4.131.253 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 49.4.131.253
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '49.4.128.0 - 49.4.255.255'
% Abuse contact for '49.4.128.0 - 49.4.255.255' is '[email protected]'
inetnum: 49.4.128.0 - 49.4.255.255
netname: CNISP-UNION
descr: Beijing CNISP Technology Co., Ltd
descr: Room 503, Building D,
descr: No.2 Shangdi Xinxi Road Pioneering Park,
descr: Haidian District, Beijing, 100085, P.R.China
country: CN
admin-c: CM2275-AP
tech-c: CM2275-AP
abuse-c: AC1910-AP
status: ALLOCATED PORTABLE
mnt-by: MAINT-CNNIC-AP
mnt-irt: IRT-CNISP-CN
last-modified: 2024-05-19T23:21:36Z
source: APNIC
irt: IRT-CNISP-CN
address: Beijing CNISP Technology Co., Ltd
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: CM2275-AP
tech-c: CM2275-AP
auth: # Filtered
remarks: [email protected] was validated on 2025-12-08
mnt-by: MAINT-AP-CNISP
last-modified: 2025-12-08T03:11:27Z
source: APNIC
role: ABUSE CNISPCN
country: ZZ
address: Beijing CNISP Technology Co., Ltd
phone: +000000000
e-mail: [email protected]
admin-c: CM2275-AP
tech-c: CM2275-AP
nic-hdl: AC1910-AP
remarks: Generated from irt object IRT-CNISP-CN
remarks: [email protected] was validated on 2025-12-08
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2025-12-08T03:11:48Z
source: APNIC
role: CNISP Management
address: Building D, No.2 Xinxi Road, Haidian, China
country: CN
phone: +86-10-82893336
fax-no: +86-10-82893337
e-mail: [email protected]
admin-c: QH677-AP
tech-c: QH677-AP
nic-hdl: CM2275-AP
mnt-by: MAINT-AP-CNISP
last-modified: 2024-12-10T06:21:16Z
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 49.4.131.253.
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 49.4.131.253: 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