IP Blacklist Check
Scan an IPv4 or IPv6 address through more than 80 DNS-based blackhole lists (DNSBL) and IP reputation services to find out whether it is involved in spam, malware, scanning or other abuse.
- Runs on our servers
- Free to use
- API available →
About this tool
The IP Blacklist Check is the tool IPVoid started with in 2010 and still its most used one. It submits the address to the APIVoid IP Reputation API, which queries more than eighty DNSBL and IP reputation services in parallel and returns every verdict together with geolocation, ISP and autonomous-system data and a 0–100 risk score. Detections are listed first, each with a link to the engine so you can read why the address was listed and request removal.
Typical uses: checking why outgoing e-mail is being rejected, vetting an IP that appears in your server logs, deciding whether a sign-up or payment deserves extra scrutiny, and verifying that a cleaned-up server has been delisted everywhere. Both IPv4 and IPv6 addresses are supported; private and reserved ranges are rejected because no public list tracks them.
How to use it — quick steps
- 01
Enter the ip address
Type or paste the ip address in the field above. The lookup runs from our servers, not from your device.
- 02
Press "Check IP address"
Press "Check IP address" or Ctrl + Enter. The result appears below in a few seconds. Results can be copied.
- 03
Read the result
It appears in the dark panel under the form in a few seconds. Every block has [copy] and other actions.
Key features of this tool
80+ blacklists at once
DNS-based blacklists (DNSBLs), abuse trackers, spam blocklists, botnet command-and-control (C&C) lists, and IP intelligence feeds, each with a link to the respective provider's information page.
Who and where
Reverse DNS (if present, can be empty or just a dot), ISP, full ASN details, organization, continent, country, region and city of the IP address, plus the announced route.
Anonymity signals
Proxy, VPN, Tor exit node, residential proxy, relay, and data centre flags help identify IPs associated with anonymisation services that may be used to hide the user's origin.
Frequently asked questions
What is an IP blacklist?
A list of IP addresses that have been observed sending spam, hosting malware, attacking servers or participating in botnets. Mail servers and firewalls consult these lists, often over DNS (DNSBL), to decide whether to accept traffic from an address.
My IP is listed, how do I get it removed?
Fix the cause first (compromised machine, open relay, infected website), then click the engine name in the report and follow its delisting procedure. IPVoid does not operate any blacklist and cannot remove entries.
Why is my home or office IP blacklisted?
Dynamic consumer ranges are often listed as a policy (they should not send mail directly), or a previous user of the address, or an infected device on your network, generated abuse.
Does a single detection mean the IP is dangerous?
Not necessarily. Some lists are aggressive or include whole ranges. Look at the risk score and the number of detections: several high-confidence engines agreeing is a much stronger signal than one.