Meet Otto.
Your newest
phone contact.

Stop wondering. Start knowing. Text any number to Otto for instant answers.

Text Otto Now
🔍

Simple

No apps, no accounts. Just text any unknown number to Otto and get instant results.

📱

Instant

Get answers in seconds. Text-based lookup means no waiting or loading screens.

🛡️

Transparent

Identify spam calls and unwanted numbers instantly.

See It In Action

Text any number. Get instant clarity.

Otto
(844) 321-6886
(844) 123-4567
Otto found: John Smith
Otto
(844) 321-6886
(855) 987-5443
Otto found: No name found, but this is a VOIP number, often used by scammers. Be cautious before sharing personal info.

📲 SMS Service Terms

By texting any phone number to Otto at 1-844-321-OTTO (1-844-321-6886), you consent to receive SMS responses containing caller identification information. Message and data rates may apply. Message frequency varies based on your usage. You can cancel at any time by replying STOP. Reply HELP for assistance. For more information, see our Terms of Service and Privacy Policy.

Frequently Asked Questions

How does Otto work?

Simply save Otto's number in your contacts. When you receive a call from an unknown number, text that number to Otto. You'll instantly receive information about who's calling—whether it's a legitimate business, a personal contact, or an unknown number.

Is Otto free to use?

Otto offers 2 free lookups so you can test. Subscribers get unlimited lookups for $2.99/month.

How accurate is the information?

Otto identifies caller information using carrier databases, including caller names, phone carriers, and whether a number is mobile, landline, or VOIP.

Is my data private?

Otto doesn't share or sell your data to third parties. Lookup requests are processed securely through our messaging service.

What if Otto doesn't recognize a number?

If a number isn't in our databases, Otto will let you know. You can also report spam numbers to help improve our system and protect other users.