Domain Research Suite Blog & How To Guides & FAQ

Posted on February 26, 2019

Read the other articles

Reverse WHOIS Search Web tool tutorial

Basic Reverse WHOIS Search

Basic search allows searching through the whole WHOIS record. Use basic search if you aren’t sure which fields are present in the target WHOIS records or where the data you search might be.

For instance, let’s find all the domain names containing travel in their WHOIS records.

To do this, go to Reverse WHOIS Search > Basic search, type travel to the search field and press Search.

To do this, go to 'Reverse WHOIS Search' > 'Basic search', type 'travel' to the search field and press 'Search'.

Note that the search results are always limited to 10,000 records. It means that you may not find all the relevant domain names if there are a lot of domain names matching your basic search query.

Advanced Reverse WHOIS Search

Search by several terms

If you want to find fewer domain names, but more relevant ones, you can optimize your search query by means of Advanced search. It allows performing a search by several search terms, specific WHOIS record fields. Also, it provides date filters.

Go to Reverse WHOIS Search > Advanced search.

Let’s say we’d like to narrow down our search results and search by (travel AND europe) terms which may be present anywhere in WHOIS records.

Fill in the search input with travel, then press Add term and add europe term. Finally, press Search.

Fill in the search input with 'travel', then press 'Add term' and add 'europe' term. Finally, press 'Search'.

And see the results.

And see the results.

Note that you can add up to 4 search terms to your Advanced search query.

Exclude terms

Sometimes, you may need WHOIS records to exclude specific terms. For example, we’d like to search by (travel AND europe AND NOT clientDeleteProhibited) terms in order to find the domain names whose statuses aren’t clientDeleteProhibited.

To do so, add one more term clientDeleteProhibited to your search query, and change its switch to Exclude mode.

To do so, add one more term 'clientDeleteProhibited' to your search query, and change its switch to 'Exclude' mode.

Now we get fewer results.

Now we get fewer results.

Search by specific WHOIS fields

You can specify particular fields of your search terms. For that, switch Search where parameter to In specific WHOIS fields.

Such kind of search supports the following options:

  • Starts with - the field contains your term at the beginning. For example, the search term (Starts with client) will be matched by clientDeleteProhibited, clientUpdateProhibited, but not ok clientDeleteProhibited etc.
  • Ends with (only for the 'DomainName' field) - the field contains your term at the end. For example, the search term (Ends with DeleteProhibited) will be matched by clientDeleteProhibited, ok clientDeleteProhibited, but not clientUpdateProhibited etc.
  • Contains (only for the 'DomainName' field) - the field contains your term between the beginning and the end. For example, the search term (Contains Update) will be matched by clientUpdateProhibited, but not clientDeleteProhibited, ok clientDeleteProhibited etc.
  • Contains a word - the field contains the exact word. We use the Unicode Text Segmentation algorithm to extract words from the fields. For example, if the field status equals ok clientDeleteProhibited, you can search by ok and clientDeleteProhibited, but not by client.

Let’s perform the following query:

  • Domain name starts with hotel
  • Status starts with ok
  • Registrant State contains California
Perform the following query.

Now the results are even more specific.

Now the results are even more specific.

Search through recently updated domains

By default, the Reverse WHOIS search searches through the recent states of all known domain names. The recent state is the last domain name’s WHOIS record which our system captured. For example, if the domain name example-domain.com was last updated in Jan 2018, with status redemptionPeriod, you can still find it with your search query.

Often, it may not be what you’d like to get. Let’s say, we’d like to search all the domains which have REDEMPTIONPERIOD status at the moment. In this case, use the Search through recently updated domains.

Use the 'Search through recently updated domains'.

For both Basic and Advanced searches you’re able to specify the search type:

  • Current - Search in the current WHOIS records only.
  • Historic - Search in both current and historical records.
  • Recently updated - Search through the domain names for which we discovered changes in their WHOIS records for the past three days.

Let’s find all the domain names starting with hotel whose Registrant State has been california and status has been redemptionperiod for the past three days.

Find all the domain names starting with 'hotel' whose Registrant State has been 'california' and status has been 'redemptionperiod' for the past three days.

Now you have the most relevant results meeting your requirements.

Now you have the most relevant results meeting your requirements.
Read the other articles