TechTheft Web Blacklist
TechTheft is a private IP blacklist cataloging network abuse. This blocklist is not for public use.
Updated on 17 Jun 2026: We added a practical investigation workflow for TechTheft listings and tightened the delisting guidance around abuse contacts, DNSBL response codes, and complaint remediation.
Summarize with
Check if you are listed on TechTheft Web Blacklist
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 TechTheft Web Blacklist?
The TechTheft Web Blacklist is a private DNS-based blacklist (DNSBL) that lists IP addresses and related internet resources tied to network abuse. According to the operators, a listing occurs when a network abuse complaint has been made and remains unresolved. This blocklist is not available for public use; it is an internal list provided to a select group of subscribers by invitation only. TechTheft's policy says it can list any internet resource that interacts with its spam or attack traps, so the catalog is broader than mail server IPs.
TechTheft Web Blacklist lists a wide range of internet resources, including:
- Email sources
- DNS nameservers
- Network IP blocks
- Website hosts
- Email servers
- Virus-infected machines
- Web crawlers, spiders, and agents
The project does not accept public nominations to its main blacklist. It says information posted to certain Usenet groups can be reviewed for inclusion in manual zones, so treat those manual zones as separate from the invitation-only DNSBL.
Who runs TechTheft Web Blacklist?
TechTheft operates the blacklist. Its public material describes a fight against "Hi-Technology Theft", including spam and viral attacks. It also references Distributed Denial of Service (DDoS) attacks. TechTheft says abuse should be stopped at the source and uses the phrase "Internet Death Penalty" for blocking sources and supporters of malicious activity. The language is aggressive, but it matters operationally because TechTheft expects abuse reports to be fixed, not filtered around.
How do I get delisted from TechTheft Web Blacklist?
The delisting process from this blacklist (or blocklist) is based on resolving active complaints. There is no public lookup page or self-service removal form. Start by fixing the issue that triggered the complaint, then make sure TechTheft can reach the right abuse contact for the domain and netblock.
Before a delisting is processed, you must:
- Maintain an abuse contact. Keep abuse@yourdomain.com active and publish accurate WHOIS or RDAP abuse contacts for the IP space involved.
- Resolve complaints. Act on every complaint sent to the abuse contact, including compromised hosts, open proxies, spam sources, infected machines, abusive crawlers, or misconfigured web services. TechTheft says the listing is removed automatically once active complaints are resolved.
- Document fixes. Keep timestamps, log extracts, ticket IDs, and remediation notes so you can show what changed if a subscriber or upstream provider asks for proof.
If the DNSBL response is 127.0.1.*, TechTheft says the issue has been published in news.admin.net-abuse.* Usenet groups. Search those group archives or the current group feed for the listed IP, hostname, and abuse contact domain to find the complaint trail.
How to investigate a TechTheft listing
Because TechTheft is private, do not treat a reported listing as proof that your mail platform is the only problem. The blacklist can include DNS nameservers, website hosts, crawling agents, infected endpoints, and whole network blocks, so the right investigation starts with the asset type.
- Confirm the evidence. Ask the sender, recipient, mail administrator, or subscriber who saw the rejection for the full SMTP bounce, DNSBL return code, timestamp, source IP, and hostname.
- Map the asset. Check whether the IP was sending mail, hosting a site, resolving DNS, crawling a site, or acting as a proxy at the time of the complaint.
- Review logs. Look for spam bursts, malware callbacks, web exploit traffic, open relay behavior, outbound scans, and unusual crawler user agents.
- Fix the root cause. Patch compromised applications, remove malware, close open proxies, disable abusive accounts, and update firewall or rate-limit rules.
- Verify mail authentication. If the asset sends mail, confirm SPF, DKIM, and DMARC pass for legitimate traffic so unrelated spoofing does not confuse the incident review.
This workflow also helps separate a true TechTheft blacklist issue from a broader deliverability problem. If only one private subscriber is rejecting mail and major receiving domains accept it, the operational impact stays limited. If many receivers reject the same IP, investigate additional blocklist (blacklist) signals and the sending infrastructure.
What's the impact of being listed on TechTheft Web Blacklist?
The impact of a TechTheft Web Blacklist listing is usually limited because the blocklist is private and only available to an invitation-only subscriber group. It is not a broad public DNSBL that many mail systems query by default. A listing still deserves investigation, especially when a bounce message names TechTheft, but it is unlikely to explain large-scale email delivery failures on its own.
Other TechTheft Web Blacklist blocklists
TechTheft Bad Whois Blacklist
Organization
TechTheft
Zone
bad.whois.bl.techtheft.info
Type
Domain
Impact
Inactive
Delisting
Manual
TechTheft Blacklist
Organization
TechTheft
Zone
bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Bogon Blacklist
Organization
TechTheft
Zone
bogon.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Conferr Blacklist
Organization
TechTheft
Zone
conferr.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Domain Blacklist
Organization
TechTheft
Zone
domain.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Expanded Blacklist
Organization
TechTheft
Zone
expanded.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft ISP Blacklist
Organization
TechTheft
Zone
isp.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Nana Blacklist
Organization
TechTheft
Zone
nana.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Other Blacklist
Organization
TechTheft
Zone
other.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Robot Blacklist
Organization
TechTheft
Zone
robot.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Scanning Blacklist
Organization
TechTheft
Zone
scanning.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Source Blacklist
Organization
TechTheft
Zone
source.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Support Blacklist
Organization
TechTheft
Zone
support.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Virus Blacklist
Organization
TechTheft
Zone
virus.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Watchlist Blacklist
Organization
TechTheft
Zone
watchlist.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
