Call Insider

Free plan AndroidWeb

What Call Insider is

Call Insider helps people identify unknown phone numbers and assess whether calls may be welcome. Its Android app uses information from more than 100 websites in a database of over 300 million identified numbers. During a call, a rating can appear on a dedicated screen or in a pop-up. A downloadable database covering more than 100 countries supports offline lookup. Users can rate numbers, review community ratings and yearly interest, and sometimes see a landline location. These reports can help with calls from telemarketers, survey callers, couriers, or offices. The site describes blocking potentially harmful and unsaved numbers as in development. Call Insider says the app cannot access or send the user’s own phone number; when a rating is requested, it sends the queried number in anonymized form without call history, contacts, names, or timestamps. Contacts are used only to distinguish known from unknown callers and are not saved or shared. Free registration offers fewer ads, editable rating history, reply notifications, more daily comments, and easier harmful-comment reporting. The service was created in the Czech Republic in 2011.

Who it suits

Call Insider suits people who want to identify unfamiliar callers, check community feedback, or look up numbers offline. It may be useful when screening telemarketing, survey, courier, or office calls.

What it does well

Database includes over 300 million identified numbers
Offline lookup covers more than 100 countries
Ratings can appear during a call
Contacts are not saved or shared
Free registration adds rating and comment features

What to know first

Call blocking is still in development
Forum comments are only partly moderated
No API is provided or planned

Plans

Plan	Billed and limits	Price
Call Insider	Completely free for everyone without restrictions · no ads	Free

As callinsider.com lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://www.callinsider.com/ or use the Android app.
Look up an unknown number online, or download the database for offline lookup.
Check a number’s rating on its dedicated call screen or in a call pop-up.
Rate unknown numbers and view community ratings.
Register for fewer ads, editable rating history, reply notifications, more daily comments, and easier reporting.

Verdict

Call Insider combines caller ratings with a large database and offline lookup. Keep in mind that number blocking is not yet available and user comments are not fully moderated.

Questions

Is Call Insider free?

Yes. Its listed plan is free, and the plan description says it is free for everyone without restrictions and has no ads.

Which platforms does it support?

Call Insider is available on Android and the web.

Can it identify numbers offline?

Yes. The app offers a downloadable phone-number database covering more than 100 countries.

Does Call Insider offer call blocking?

The website describes blocking potentially harmful and unsaved numbers as in development.

Does Call Insider provide an API?

No. Its FAQ says it does not provide an API and has no plans to provide one.

Who created Call Insider, and when?

The service says it was created in the Czech Republic in 2011.

Facts from Call Insider's own pages

Account benefits: Free registration provides fewer ads, editable rating history, reply notifications, more daily comments, and easier reporting of harmful comments. · callinsider.com, 8 Oct 2026
API: The FAQ says Call Insider does not provide an API and has no plans to provide one. · callinsider.com, 8 Oct 2026
Audience: The service is for people seeking to identify callers and judge whether a call is desirable, including telemarketing, survey, courier, and office calls. · callinsider.com, 8 Oct 2026
Call blocking: The website describes blocking potentially harmful and unsaved numbers as in development. · callinsider.com, 8 Oct 2026
Caller identification: The app can show a phone number rating on a dedicated call screen or in a pop-up during a call. · callinsider.com, 8 Oct 2026
Community ratings: Users can rate unknown numbers and view other users’ ratings, yearly interest in a number, and sometimes its landline location. · callinsider.com, 8 Oct 2026
Contact handling: The Google Play listing says contacts are used only to distinguish known from unknown numbers and are not saved or shared. · play.google.com, 8 Oct 2026
Founded: 2011 · callinsider.com, 28 Sept 2026
Headquarters: Prague, Czech Republic · callinsider.com, 28 Sept 2026
History and origin: The service says it was created in 2011 in the Czech Republic. · callinsider.com, 8 Oct 2026
Moderation limits: The FAQ says the forum is only partly moderated because thousands of comments are posted daily, and comment credibility cannot be fully ensured. · callinsider.com, 8 Oct 2026
Offline lookup: The app offers a downloadable phone number database covering more than 100 countries for identification without an internet connection. · callinsider.com, 8 Oct 2026
Phone database: The mobile app says its database contains more than 300 million identified phone numbers, using data from more than 100 websites. · callinsider.com, 8 Oct 2026
Privacy: The site says the app cannot access the user’s phone number and does not send it anywhere; when requesting a rating, it sends the queried phone number in anonymized form without call history, contacts, names, or timestamps. · callinsider.com, 8 Oct 2026
Purpose: Call Insider is a free service for identifying unknown phone numbers and sharing experiences about nuisance and useful callers. · callinsider.com, 8 Oct 2026
Support: The app listing provides [email protected] as its support email. · play.google.com, 8 Oct 2026

Where Call Insider stands on Freedom251

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