Ever received a strange call and wondered, “Who called me?” You’re not alone. With today’s technology, finding someone’s phone number information is easier than ever. Whether you want to identify unknown callers, confirm if a number is real, or just learn more about who’s behind it, these 24+ trusted phone lookup tools can help.
How to Use These Tools
- Copy or note the number you want to check.
- Pick a tool from above (some free, some paid).
- Enter the number with its full country code (like +1, +44 ).
- Run the search, and you’ll see details such as name, carrier, or city.
- Compare results across multiple sites for the most accurate info.
What These Tools Offer
- Find the name or identity behind unknown numbers.
- Confirm if a number is real or active.
- Identify spam or scam callers.
- Check carrier and network information.
- API access for business or developer integration.
1. Voicemail
Voicemail lets you receive recorded messages when you miss a call. Some tools also let you leave messages without ringing the person’s phone.
👉 Learn more about voicemail on Wikipedia
2. Slydial
Slydial allows you to call directly to someone’s voicemail directly without ringing their phone. Perfect for leaving a quick message discreetly.
🔗 https://www.slydial.com
3. International Numbering Plans
This site helps you identify the country, region, and carrier of international numbers by checking global numbering formats.
🔗 https://www.numberingplans.com/?page=analysis&sub=phonenr
🔗 https://www.numberingplans.com
4. This Number
This number is a free reverse phone lookup and directory assistance website. It lets you search for U.S. and international numbers to find name, address, carrier, and location details. You can also see community reports about spam or telemarketing numbers.
🔗 https://www.thisnumber.com
5. Numberway
A worldwide directory that connects you to national phonebooks and reverse lookup sites by country.
🔗 https://www.numberway.com
6. WhoCalld
Lets you search for who called from a specific number and read comments from other users about spam or scam calls.
🔗 https://www.whocalld.com
7. 411.Com
The classic online phone directory for names, addresses, and numbers in the U.S.
🔗 https://www.411.com/reverse-phone-lookup
8. CallerID Test
A web tool to test caller ID information or verify caller identity when making calls.
🔗 https://calleridtest.com
9. ThatsThem – Reverse Phone Lookup
Provides free reverse lookup results for phone numbers, addresses, and emails often showing name and city.
🔗 https://thatsthem.com
10. Twilio Lookup
For developers: get carrier, line type, and caller name via API. Great for business verification.
🔗 https://www.twilio.com/lookup
11. Fone Finder
Simple tool showing the city, state, and carrier of U.S. numbers based on the first six digits.
🔗 http://www.fonefinder.net
12. True Caller
A well-known mobile app that identifies unknown callers and blocks spam calls with its vast user database.
🔗 https://www.truecaller.com
13. Reverse Genie
Offers reverse lookup reports with name, carrier, location, and sometimes related profiles.
🔗 https://www.reversegenie.com
14. ReversePhoneCheck
https://www.reversephonecheck.com
15. SpyDialer
Lets you search for phone owner info using public data free lookups for names, addresses, or social media links.
🔗 https://www.spydialer.com
16. Phone Validator
Checks if a number is valid, active, and identifies its carrier or type (mobile, VOIP, or landline).
🔗 https://www.phonevalidator.com
15. Free Carrier Lookup
Quickly check which mobile network a number belongs to.
🔗 https://freecarrierlookup.com
16. Mr. Number (M)
Mobile app that identifies and blocks spam or scam calls. You can also do manual lookups.
🔗 https://mrnumber.com
17. Hiya
Hiya is a popular caller ID and spam blocker app that helps identify unknown numbers and automatically filter scam or robocalls. It also offers reverse phone lookup and integrates directly into many smartphones’ dialers for real-time caller identification.
https://www.hiya.com/products/apps/hiya-spam-blocker
18. CallerIDService.com (R)
Business lookup and caller ID service showing business name, type, and location from registered databases.
🔗 https://calleridservice.com
19. Next Caller (R)
Enterprise-grade CNAM lookup for companies to get accurate caller name and trust data.
🔗 https://www.nextcaller.com
20. Data24-7 (R)
API-based lookup platform offering carrier, line type, and location data for phone numbers worldwide.
🔗 https://www.data24-7.com
21. HLR Lookup Portal (R)
Performs real-time number validation and HLR (Home Location Register) lookups to check if a SIM is active.
🔗 https://www.hlr-lookups.com
22. OpenCNAM
Provides real-time caller ID lookup for businesses and developers through web and API.
🔗 https://www.opencnam.com
23. OpenCNAM API
The API version of OpenCNAM ideal for integrating CNAM lookups directly into applications.
🔗 https://www.opencnam.com
24. USPhoneBook
Free public directory that allows reverse lookups for U.S. phone numbers. Often shows owner names.
🔗 https://www.usphonebook.com
25. Numspy (T)
Provides reverse lookup and validation via a simple web interface and API.
🔗 https://numspy.com
26. Numspy-Api
Developer API version of Numspy allows bulk or automated lookups for CRM and verification systems.
🔗 https://numspy.com
27. Home.Neustar
https://www.home.neustar/trusted-call-solutions/caller-name-services
28. US Phone Book
Finally
Using these tools, you can quickly identify unknown callers, stop spam, and learn who’s behind mysterious numbers. Always use reverse lookup responsibly for safety, business, or personal protection.