IP Address Blacklist Check

Network & Web

Free
No Download/Install required
No registration

https://www.whatismyip.com/ip-address-blacklist-check/

The IP Address Blacklist Check tool on WhatIsMyIP.com serves as a diagnostic gateway for auditing the reputation of a specific IP address against more than 70 DNS-based Blackhole Lists (DNSBL) and Real-time Blackhole Lists (RBL). By cross-referencing an IP against these global databases, the service identifies whether a network identifier has been flagged for activities such as spam propagation, malware hosting, or botnet participation. This utility is essential for identifying the root cause of communication failures where outbound traffic is being silently dropped or rejected by remote mail servers and security appliances.

Tip: if you’re on an internet provider rotating its IPs, and you can’t access some site or notice you get any kind of dedicated messages, this a test you can do, as it checks your current IP to 18 online spam databases. Maybe a previous user has not been behaving as respectfully as you.

Engineers and quality assurance professionals in manufacturing and R&D leverage this tool to safeguard the reliability of automated data transmission and supply chain connectivity. Its primary applications include:

Validating that Industrial Internet of Things (IIoT) telemetry and manufacturing execution system (MES) data reach cloud endpoints without being filtered as malicious traffic.
Ensuring the uninterrupted delivery of automated compliance documentation and quality control reports to global regulatory bodies.
Monitoring the health of dedicated research network nodes to prevent IP reputation degradation from stalling collaborative innovation projects.
Verifying that automated procurement and logistics communications from ERP systems are not blacklisted by external vendor security protocols.

Disciplines: Network engineering, Cybersecurity, IT administration, Industrial IoT, Manufacturing.

Free alternative to MXToolbox Blacklist Check, Sender Score, Cisco Talos.

IP Address Blacklist Check compared with MXToolbox Blacklist Check, Sender Score and Cisco Talos
IP Address Blacklist Check	MXToolbox Blacklist Check	Sender Score	Cisco Talos
What is assessed: Any public IP address, checked against multiple DNS-based blocklists (DNSBL).	What is assessed: An IP address or host checked against blacklists. The same service also provides SMTP testing, DNS, SPF and PTR record lookups.	What is assessed: The reputation of a sending IP address as a score from 0 (worst) to 100 (best). It ranks an IP against other IPs, much like a percentile.	What is assessed: IP addresses, websites and URLs. Email reputation depends on the IP of an email server, while web reputation depends on the whole domain and its IP addresses.
Data basis: Queries widely used DNSBLs, and the report states which list flagged the address.		Data basis: A proprietary Validity algorithm using complaints, spam traps and deliverability data from the Validity Data Network, a cooperative of more than 80 mailbox and security providers. Scores are usually based on a rolling 30 day average.	Data basis: Cisco threat intelligence telemetry, refreshed every 3 hours.
Output and follow-up: A consolidated report listing each blacklist, whether the IP is listed, and links to delisting instructions when available. Some lists automate removal and others review requests manually.		Output and follow-up: A single number plus component indices: complaints, volume, external reputation, unknown users and rejected mail.	Output and follow-up: A reputation result, and a ticket can be submitted when the owner believes a conviction or categorization is wrong. Domain and IP results can differ.
Access and cost: Free to use, and it requires JavaScript for live checks.	Access and cost: A free version is available. Blacklist and DNS or domain health monitoring belong to paid plans.

Privacy: we have no feedback of potential problem with this tool and author. But like many online services, you are here providing them with your own data. Depending of the criticity of your data, this is your responsibility to assess author's reputation and potential misusage, and to check and accept their terms and conditions, or not.