MxToolBox
mxtoolbox.com › ReverseLookup.aspx
Reverse IP Lookup - MxToolbox
The Reverse Lookup tool will do a reverse IP lookup. If you type in an IP address, we will attempt to locate a dns PTR record for that IP address. You can then click on the results to find out more about that IP Address. Please note that in general, your ISP must setup and maintain these Reverse ...
DNS Checker
dnschecker.org › reverse-dns.php
Reverse IP Lookup - Reverse DNS Lookup
Reverse IP Lookup tools resolve a given IP to the Host. When you enter an IP address, the tool attempts to locate a DNS PTR record for that IP address. Related tools DNS Propagation Check DNS Domain Lookup Online Traceroute IP to Location Check IP Blacklist
Any bulk reverse IP-domain name look up tools, that are free?
I believe with Dnstrails.com you can do this. More on reddit.com
3
2
February 14, 2020ELI5: How does Reverse IP lookup work?
Visit https://whatismyipaddress.com/ and click on the digital IP address. The hostname shown is the result of the reverse IP lookup. The IP address owner voluntarily publishes the hostname associated with the IP address. For example 8.8.8.8 IP address has "dns.google" hostname. Some other Google's IP address may have a hostname like 38404.corp.google.com. If that IP address is used as an intermediate node for Google employees visiting some websites, the reverse IP lookup reveals the company of the visitor. It is not as useful as the tools make you believe. The vast majority of IP addresses have either no hostname or the hostname reflects an ISP name such as .. More on reddit.com
6
5
June 24, 2024(Why) is the mail server's IP and reverse lookup still relevant today?
Because dmarc alignment still isn't a given for many. Both google and Microsoft do have domain reputation algorithms. Dkim domain RBLs do exist. We're still very much transitioning, which takes ages in the world of email. Might take another decade tbh. Once ip reputation is a thing of the past we may get a little more ipv6 adoption in email as well. Ip reputation and fcrdns mostly has to do with the ip. But spf being valid still does have the role of confirming the envelope from, and making sure it's a valid address to bounce to. That prevents backscatter spam. So aside from its role together with dkim in dmarc, spf still does have its own role. That's why it still needs to be valid, even if you're using DKIM for dmarc alignment. There's also of course the fact that for things like http, you visit the domain. In email that domain will visit you. Spam filtering is already quite a hard thing to do reliably, so you take any indication of spam that you can. Both ip reputation and fcrdns are still quite valid indicators of spam. So of course it is used. More on reddit.com
20
2
August 10, 2024Domain Override and IP lookup
Instead of doing the domain override, I would suggest to reverse the order in the chain. Have a subnet for which the domain controllers handle both DHCP and DNS. In the DNS Server settings on the domain controllers, add your pfSense firewall as a forwarder. More on reddit.com
11
8
December 21, 2021Are there free reverse IP lookup tools?
Yes. Both HackerTarget and Viewdns.info allow for several free checks daily, with limits per user. Accuracy and depth may differ by service. Command-line tools on Linux or Mac are always free.
greengeeks.com
greengeeks.com › home › how to do a reverse ip lookup: step-by-step guide
How to Do a Reverse IP Lookup: Step-by-Step Guide | GreenGeeks
Is reverse IP lookup accurate for geolocation?
Country-level results reach 99 percent, but accuracy dips for city inference, especially with VPN or proxy usage. City accuracy is typically between 80 and 90 percent for internet addresses.
greengeeks.com
greengeeks.com › home › how to do a reverse ip lookup: step-by-step guide
How to Do a Reverse IP Lookup: Step-by-Step Guide | GreenGeeks
How does reverse IP lookup improve email delivery?
Mail reputation systems query pointer records for incoming connections. If the pointer links to the sending domain, and both forward and reverse records match, the likelihood of your mail reaching the inbox is higher by nearly 30 percent.
greengeeks.com
greengeeks.com › home › how to do a reverse ip lookup: step-by-step guide
How to Do a Reverse IP Lookup: Step-by-Step Guide | GreenGeeks
Videos
02:35
Learn How to setup a Reverse PTR DNS Record - YouTube
How to setup DNS Reverse Lookup Zones
Reverse DNS Lookups
01:36
What is Reverse DNS/reverse lookup? - YouTube
Perform Reverse DNS Lookup using Reverse IP Domain ...
00:54
What is reverse IP Lookup? How much do you know about domains and IP?
Domaintools
reverseip.domaintools.com
Reverse IP Lookup - All Names Hosted at an IP - DomainTools
Enter an IP address and our patented Reverse IP Lookup tool will show you all of the domains currently hosted there. Results include all gTLD domains and any known ccTLD domains.
IPAddressGuide
ipaddressguide.com › ipv4-reverse-ip
IPv4 Reverse IP | IPAddressGuide
Perform a reverse IP lookup on an IPv4 address to obtain the associated domain names.
Hackertarget
hackertarget.com › home › reverse ip lookup
Reverse IP Lookup, Find Hosts Sharing an IP | HackerTarget.com
April 27, 2025 - Perform a reverse IP lookup to find virtual web server hosts on an IP address. Useful during investigations or identifying the attack surface of a system.
ICANN
lookup.icann.org
ICANN Lookup
The ICANN registration data lookup tool gives you the ability to look up the current registration data for domain names and Internet number resources.
ViewDNS.info
viewdns.info › reverseip
Reverse IP Lookup - ViewDNS.info
Takes a domain or IP address and does a reverse lookup to quickly shows all other domains hosted from the same server. Useful for finding phishing sites or identifying other sites on the same shared hosting server.
GreenGeeks
greengeeks.com › home › how to do a reverse ip lookup: step-by-step guide
How to Do a Reverse IP Lookup: Step-by-Step Guide | GreenGeeks
June 23, 2025 - Reverse IP lookup maps an internet protocol address to one or more host names tied to it, using pointer records. This process moves in the opposite direction of a normal DNS query, which finds the IP from a domain name.
WhoisXML API
reverse-ip.whoisxmlapi.com › lookup
Reveal the domain names sharing an IP address - Reverse IP
Obtain a list of the domains with the same IP address in seconds with our Reverse IP Lookup. Try the tool today.
EasyDMARC
easydmarc.com › home › tools › dns record checker
Free Reverse IP Lookup & PTR Record Check | EasyDMARC
Check your domain’s PTR records by entering your domain or IP address and DNS server provider. ... PTR records, also known as pointer records, are a type of DNS record used in reverse DNS lookups. Typically, A records and AAAA records map domain names to IP addresses so users can enter URLs to find specific addresses.
DNSlytics
dnslytics.com › reverse-ip
Reverse IP - Find websites hosted on the same IP address, server or subnet
Find websites and domains hosted on the same IP address (reverse IP) or subnet (reverse ip subnet).
YouGetSignal
yougetsignal.com › tools › web-sites-on-web-server
Reverse IP Lookup - Find Other Web Sites Hosted on a Web Server
A reverse IP domain check takes a domain name or IP address pointing to a web server and searches for other sites known to be hosted on that same web server. Data is gathered from search engine results, which are not guaranteed to be complete. IP-Address.org provides interesting visual reverse ...
Debouncer
debouncer.com › reverse-dns-check
Reverse DNS Check - Debouncer
The Reverse DNS Check Tool performs reverse IP lookup and runs PTR record FCrDNS test.
BrightCloud
brightcloud.com › tools › url-ip-lookup.php
URL/IP Lookup | Webroot BrightCloud
View a summary of IP address data including threat status and analysis, geographic location, and virtually hosted domains on the IP address. Interested in the full service?
Whoisfreaks
whoisfreaks.com › tools › dns › reverse › lookup
DNS Reverse Search - WhoisFreaks
Reverse IP Lookup: Reverse IP lookup taps into a complex database that records IP addresses associated with crawled websites, providing a list of websites hosted at a specific IP address.
NSLookup
nslookup.io › reverse-ip-lookup
Reverse IP Lookup
Find the domain name that is connected to an IP address. Check if the any websites are hosted on an IP by doing a reverse DNS lookup.
Info by IP
infobyip.com › ipbulklookup.php
Domain and IP bulk lookup tool
Domain and IP bulk lookup tool allows to lookup domain, location, ISP and ASN for multiple hosts (IPs or domains) at once. It also supports lookup of MX or NS DNS records for multiple domains. This tool is commonly used for investigating IPs found in server logs.
DomainTools
whois.domaintools.com
Whois Lookup, Domain Availability & IP Search - DomainTools
Research domain ownership with Whois Lookup: Get ownership info, IP address history, rank, traffic, SEO & more. Find available domains & domains for sale.
DNSlytics
dnslytics.com
Online investigation tool - Reverse IP, NS, MX, WHOIS and Search Tools
DNSlytics provides the ultimate online investigation tool. See detailed information about every IP address, domain name and provider. Perform network tests like DNS lookup, email testing and WHOIS lookups.
Hosting Checker
hostingchecker.com › tools › reverse-ip-lookup
Reverse IP Lookup by Hosting Checker
At HostingChecker we have created one of the most powerful free reverse IP lookup tools. We have database of more than 250 million active domains with their respective IP addresses and we can find matches on both IP addresses and domain names.