BLOCKEDSERVERS Netscan Blocklist
Monitor the BLOCKEDSERVERS Netscan blocklist (blacklist) using real-time IP data. Track your email deliverability metrics with Suped.
Updated on 17 Jun 2026: We updated this guide to clarify Netscan listing causes, delisting checks, and how blocklist monitoring fits with DMARC reporting.
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Check if you are listed on BLOCKEDSERVERS Netscan Blocklist
And 143 other blocklists.
Spamhaus
0Spam
Cisco
NoSolicitado
URIBL
abuse.ro
ALPHANET
Anonmails
Ascams
BLOCKEDSERVERS
Calivent Networks
EFnet
JustSpam
Kempt.net
NordSpam
RV-SOFT Technology
Scientific Spam
Spamikaze
SpamRATS
SPFBL
Suomispam
System 5 Hosting
Team Cymru
Validity
www.blocklist.de Fail2Ban-Reporting Service
ZapBL
2stepback.dk
Fayntic Services
ORB UK
technoirc.org
TechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftWhat is BLOCKEDSERVERS Netscan Blocklist?
The BLOCKEDSERVERS Netscan Blocklist is a Real-time Blackhole List (RBL), also called a DNS-based Blackhole List (DNSBL), that lists IP addresses seen in network scans. It is one of several blocklists operated by BLOCKEDSERVERS. The main purpose of this specific blacklist is to identify IPs that appear misconfigured, compromised, exposed to abuse, or connected to scanning, spam, or other unwanted network behavior.
Available policy weighting information associated with BLOCKEDSERVERS indicates that this blocklist can be used inside a broader filtering system that scores multiple DNSBL signals. In that model, each blacklist contributes points, and a server's total score determines whether an email is accepted, rejected, or handled with extra caution. Because the BLOCKEDSERVERS Netscan Blocklist has a relatively low score in that type of setup, it is usually a signal to investigate rather than proof that the IP should be rejected everywhere. System administrators use this blocklist to filter incoming email and reduce spam reaching their users.
Why does an IP appear on BLOCKEDSERVERS Netscan Blocklist?
A Netscan listing should be treated as a network reputation signal, not only an email spam signal. Because the list is based on scan data, the cause can sit outside the mail server itself.
- A compromised host on the same IP is scanning other networks or sending unwanted traffic.
- A mail server has an open relay, weak SMTP authentication, or a script that sends mail without authorization.
- An exposed proxy, VPN endpoint, or web application has been abused for scanning, spam, or brute force traffic.
- A shared or dynamic IP was listed because of activity by another customer or a previous holder of the address.
These checks help separate a true blacklist problem from an inherited or shared IP reputation issue before you request removal.
Who runs BLOCKEDSERVERS Netscan Blocklist?
The blacklist is operated by BLOCKEDSERVERS. Public company information is limited, but the operator has published policyd-weight configuration details that show how its DNSBL data can be weighted alongside other blacklist signals. This gives some insight into its operational policy and how its RBLs fit into a broader anti-spam strategy.
How do I get removed and delisted from BLOCKEDSERVERS Netscan Blocklist?
The delisting process for this blacklist starts with the lookup tool on the BLOCKEDSERVERS website. If your IP address is listed, the site can provide removal instructions or a delisting form. Do not treat delisting as a reset. Fix the cause first, then request removal.
Before you request removal from this or any other blocklist, identify and resolve the underlying issue that caused the listing. If you do not fix the problem, your IP can be listed again. Take these steps first:
- Check for compromises, malware, unauthorized scripts, or infected applications that are sending spam or scanning other networks.
- Confirm your mail server is not configured as an open relay and that SMTP authentication is not being abused.
- Review outgoing mail logs, connection logs, and queue data for unusual send volume, repeated failures, or traffic to unrelated networks.
- Confirm the listed IP belongs to your sending infrastructure. On shared hosting, cloud, or dynamic connections, the reputation issue can come from another tenant or a previous user of the IP.
Once you have resolved the root cause, proceed to the BLOCKEDSERVERS website to look up your IP and request delisting.
What is the impact of being listed on BLOCKEDSERVERS Netscan Blocklist?
The impact of being listed on the BLOCKEDSERVERS Netscan Blocklist is generally low. In the published weighting example associated with BLOCKEDSERVERS, this specific blacklist has a score of 1.25, which is lower than many higher-severity DNSBL signals used in weighted filtering.
This low weighting means that being on this blacklist (or blocklist) alone is unlikely to cause widespread email delivery failures. It can still contribute to a higher cumulative spam score if your IP is listed on multiple RBLs used by a receiving mail server. Treat the listing as a reputation warning, investigate the cause, and resolve it before it affects more receivers.
Use Suped's blocklist monitoring with DMARC aggregate reporting to connect a listed IP to a legitimate mail stream, an unauthorized sender, shared infrastructure, or a misconfigured service before requesting delisting.
Other BLOCKEDSERVERS blocklists
BLOCKEDSERVERS Blocklist (RBL)
Organization
BLOCKEDSERVERS
Zone
rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Spam Blocklist
Organization
BLOCKEDSERVERS
Zone
spam.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Torexit Blocklist
Organization
BLOCKEDSERVERS
Zone
torexit.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
