Summary
- Hostname
- —
- ASN
- —
- Organization
- Zscaler Tokyo
- Network
- ZSCALER-TOKYO
- Range
- 175.107.156.0 - 175.107.157.255
- /24 block
- 175.107.156.0/24
- Country
- JP
- Blacklists
- 0 of 14
- Abuse contact
- [email protected]
Presence of 175.107.156.4 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 175.107.156.4
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '175.107.156.0 - 175.107.157.255'
% Abuse contact for '175.107.156.0 - 175.107.157.255' is '[email protected]'
inetnum: 175.107.156.0 - 175.107.157.255
netname: ZSCALER-TOKYO
descr: Zscaler Tokyo
country: JP
mnt-by: MAINT-ZSCALER-AU
admin-c: ZAPL2-AP
tech-c: ZAPL2-AP
abuse-c: ZAPL2-AP
geofeed: https://config.zscaler.com/downloads/geofeed.csv
status: ASSIGNED NON-PORTABLE
mnt-irt: IRT-ZSCALER-AU
last-modified: 2025-10-24T20:01:29Z
source: APNIC
irt: IRT-ZSCALER-AU
address: Level 35, One International Towers, 100 Barangaroo Ave, Sydney NSW 2000
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: ZAPL2-AP
tech-c: ZAPL2-AP
auth: # Filtered
remarks: [email protected] was validated on 2026-06-23
mnt-by: MAINT-ZSCALER-AU
last-modified: 2026-09-08T23:23:45Z
source: APNIC
role: Zscaler Australia PTY LTD administrator
address: Level 35, One International Towers, 100 Barangaroo Ave, Sydney NSW 2000
country: AU
phone: +1-408-701-0534
e-mail: [email protected]
admin-c: ZAPL2-AP
tech-c: ZAPL2-AP
nic-hdl: ZAPL2-AP
mnt-by: MAINT-ZSCALER-AU
last-modified: 2022-05-10T16:31:18Z
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 175.107.156.4.
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 175.107.156.4: 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