TechTheft Expanded Blacklist
The TechTheft Expanded Blacklist is a blocklist that automatically lists entire network ranges based on high volume spam and attack trap detections.
Updated on 17 Jun 2026: We updated the guidance with clearer delisting steps, private blocklist impact, and investigation actions for network owners.
Summarize with
Check if you are listed on TechTheft Expanded 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 Expanded Blacklist?
The TechTheft Expanded Blacklist (bl.techtheft.info) is a semi-automatic, private IP-based blacklist. Its policy is to list entire network ranges when its spam traps and attack traps detect significant malicious activity. According to TechTheft, the list is not available for public use and is provided only to invited subscribers.
This blocklist is broader than a sender-only email blacklist. Any internet-facing asset that interacts with TechTheft's traps can contribute to a listing, including systems that send mail, host malware, provide DNS, or support abusive traffic.
Assets that can be listed on this blocklist include:
- Email sources
- DNS nameservers
- Network IP blocks
- Website hosts
- Virus-infected machines
TechTheft recommends using this blacklist to block traffic on sight, preferably at the firewall level. The operators do not accept public nominations to the main list.
Who runs TechTheft Expanded Blacklist?
TechTheft Expanded Blacklist is run by the TechTheft organization. TechTheft describes its mission as combating "Hi-Technology Theft," including spam, viral attacks, and other network abuse.
TechTheft says earlier anti-abuse efforts were hampered by legal challenges or slow response times. Its stated philosophy is to apply an "Internet Death Penalty" to sources and supporters of abuse by blocking machines that relay unwanted email, host viruses, or provide support infrastructure for malicious actors.
How to investigate a TechTheft listing
Start by treating the listing as a network abuse signal rather than a simple email-only problem. Because the blacklist can list ranges, one infected host, compromised web server, open proxy, or abused DNS service can affect addresses that did not send spam directly.
- Review outbound mail logs, firewall logs, web server logs, and DNS resolver logs for suspicious destinations, unusual connection rates, and high-volume bursts.
- Confirm every domain and IP range has a working abuse@ mailbox, and route it to the team that can act on complaints.
- Remove compromised hosts, open relays, open proxies, malware, and unauthorized sending services before expecting automatic removal.
- For email-specific findings, Suped's DMARC reporting helps identify unexpected sending IPs, SPF and DKIM authentication failures, and DMARC domain mismatches tied to your domains.
- Document closure of each complaint so that when the final subordinate issue clears, the expanded listing can expire automatically.
How do I get removed and delisted from TechTheft Expanded Blacklist?
Removal from the TechTheft Expanded Blacklist is automatic. There is no manual delisting request form. An IP address or range is removed after the underlying subordinate listings and open abuse complaints associated with it have been resolved. The expanded listing clears when the last cause of the entry is gone.
Before delisting occurs, fix the abuse source and keep a functioning abuse@ mailbox for your domain and IP ranges. TechTheft expects operators to act quickly on complaints sent to that address, so ignored or bouncing abuse mail keeps the removal path blocked.
If you find your IP listed, TechTheft indicates that information about open complaints can be available on its site or in public network-abuse newsgroup archives.
What's the impact of being listed on TechTheft Expanded Blacklist?
The impact of being on the TechTheft Expanded Blacklist is usually low for most senders because the blacklist is private. It is available only to TechTheft's trusted subscribers by invitation.
A listing still needs attention because subscribed recipients can reject traffic at the firewall or mail gateway before normal filtering takes place. Your email deliverability is affected when you send to an organization that uses this specific blocklist (blacklist), but the listing does not create broad enforcement across major mailbox providers by itself.
Related TechTheft blocklists
TechTheft Bad Whois Blacklist
Organization
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Zone
bad.whois.bl.techtheft.info
Type
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TechTheft Blacklist
Organization
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bl.techtheft.info
Type
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TechTheft Bogon Blacklist
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bogon.bl.techtheft.info
Type
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TechTheft Conferr Blacklist
Organization
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Zone
conferr.bl.techtheft.info
Type
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TechTheft Domain Blacklist
Organization
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Zone
domain.bl.techtheft.info
Type
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TechTheft ISP Blacklist
Organization
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Zone
isp.bl.techtheft.info
Type
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TechTheft Nana Blacklist
Organization
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Zone
nana.bl.techtheft.info
Type
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Impact
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TechTheft Other Blacklist
Organization
TechTheft
Zone
other.bl.techtheft.info
Type
IP
Impact
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Delisting
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TechTheft Robot Blacklist
Organization
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Zone
robot.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
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TechTheft Scanning Blacklist
Organization
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Zone
scanning.bl.techtheft.info
Type
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Impact
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Delisting
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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
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Zone
virus.bl.techtheft.info
Type
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Impact
Inactive
Delisting
Manual
TechTheft Watchlist Blacklist
Organization
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Zone
watchlist.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Web Blacklist
Organization
TechTheft
Zone
web.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
