TechTheft Bogon Blacklist
The TechTheft Bogon blacklist is an automated blocklist of reserved IP ranges that should never appear in public internet traffic.
Updated on 17 Jun 2026: We updated this guide for current bogon filtering behavior and practical listing checks.
Summarize with
Check if you are listed on TechTheft Bogon 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 Bogon Blacklist?
The TechTheft Bogon Blacklist is a semi-automatic, IP-based blacklist (blocklist) that contains network ranges that should not appear as source addresses in public internet traffic. A 'bogon' is a term for an IP packet on the public internet that claims to be from IP address space that is not allocated, not assigned for public use, or reserved for special use. The policy for this blocklist is to add these ranges automatically based on IANA registries, RIR allocation data, BGP routing data, and standard internet RFC documents.
The content of this blacklist (or blocklist) includes:
- IPv4 addresses reserved by IANA for private use, such as 192.168.0.0/16, 172.16.0.0/12, and 10.0.0.0/8.
- Special-use ranges that should not be globally routed, including loopback, link-local, documentation, benchmarking, and shared address space.
- IPv6 ranges that are local or not globally reachable, such as ::1/128, fc00::/7, and fe80::/10.
- Unallocated or not-yet-assigned address space that does not have a valid RIR or ISP assignment for public use.
Technically, the DNSBL zone for this blacklist is bogon.bl.techtheft.info. The intended use is to block or firewall traffic from these IP addresses on sight through bogon filtering, anti-spoofing controls, ingress filtering, and egress filtering. According to TechTheft, access to use this list is private and available only to subscribers by invitation.
Who runs TechTheft Bogon Blacklist?
The TechTheft Bogon Blacklist is operated by the organization TechTheft. The group's stated mission is to combat what it calls "Hi-Technology Theft", including spam, viral attacks, DDoS attacks, and IP hijacking. Its blocklists are aimed at administrators who want strict controls against technology abuse.
TechTheft's philosophy is strict. They advocate for an "Internet Death Penalty" against sources and supporters of abuse. In practical terms, that means blocking traffic early in the connection, validating client registrations, and rejecting attack attempts before the traffic reaches internal systems.
How do I get removed and delisted from TechTheft Bogon Blacklist?
Removal from the TechTheft Bogon Blacklist is automatic only. Some IP addresses, by their nature, will never be removed, including ranges permanently reserved for private, loopback, link-local, documentation, or other special-use purposes. Because this blocklist contains IP addresses that should not be routing on the public internet, a valid listing points to a serious network misconfiguration.
There is no manual delisting process or removal form for the bogon list. The issue must be corrected at the source. Once the route leak, NAT error, firewall rule, tunnel configuration, or mail gateway problem is fixed and the bogon IP address is no longer visible as public traffic, the listing is removed automatically over time.
For TechTheft's other, more general blacklists, the removal process is complaint-based. If you believe you are listed on another one of their blocklists, you should:
- Ensure you have a functioning abuse@ email address for your domain and IP range.
- Act quickly on any complaints sent to that address.
- Resolve every active complaint tied to your IP address, then allow the complaint-based listing to clear.
How to troubleshoot a bogon listing
Start by confirming the listed address is the public source IP, not an internal address copied from a mail header or log. Private IPv4 ranges, IPv6 link-local addresses, loopback ranges, documentation prefixes, and unique local IPv6 addresses can appear inside systems without being the address that reached the recipient network.
- Identify the exact IPv4 or IPv6 address named in the rejection, DNSBL result, firewall log, or recipient-side report.
- Compare that address with the public egress IP used by your border router, NAT device, VPN, proxy, or mail gateway.
- Check BGP route announcements, router ACLs, and firewall policies for unallocated, reserved, or not-yet-assigned prefixes.
- Fix the source address leak, then wait for the automated bogon blacklist refresh instead of looking for a manual delisting path.
For email incidents, review the SMTP rejection and the final external Received hop before blaming email authentication. Authentication can pass while the connection still uses an invalid source address, and an internal bogon address in earlier headers can be a red herring.
What's the impact of being listed on TechTheft Bogon Blacklist?
The direct impact of being listed on the TechTheft Bogon Blacklist is usually limited because TechTheft states that its lists are private and used internally by subscribers. The operational impact is high when the listed address is the actual public source IP.
Being listed on any bogon blacklist (blocklist) for your real public source means your system is using an IP address that is not valid for public internet traffic. Network administrators following standard security practices block traffic from these addresses with router ACLs, BGP filters, and firewall rules. Mail and other public traffic from that source can fail until the misconfigured route, NAT path, or gateway is corrected.
Other TechTheft 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 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
TechTheft Web Blacklist
Organization
TechTheft
Zone
web.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
