WHOIS Caller ID & Spam Block

SIPSTACK

About this app

WHOIS Caller ID gives you instant intelligence on any phone number — before you pick up or after a missed call.

🔍 INSTANT LOOKUP
Type any North American phone number and see carrier, location, line type, and trust score in seconds.

🛡️ SPAM PROTECTION
Our AI-powered trust score analyzes 1 billion+ numbers to flag robocalls, telemarketers, and scammers before they reach you.

📊 TRUST SCORE
Each number gets a 0–100 trust score based on community reports, carrier data, and behavioral signals. Know at a glance whether a number is SAFE, SUSPICIOUS, or a known SPAMMER.

🌍 COMMUNITY REPORTS
Read and contribute real user experiences. Help protect others by reporting spam, fraud, and unwanted calls.

📍 LOCATION DATA
See the registered carrier, city, province/state, and country for any number.

📱 RECENT LOOKUPS
Your lookup history is saved locally for quick access — no account needed to get started.

🔐 OPTIONAL ACCOUNT
Sign in with your phone number to submit feedback, access enhanced data, and sync your profile across devices.

WHOIS Caller is powered by SIPSTACK's network intelligence platform, trusted by carriers and businesses across North America.

Free to use. No ads. No data selling.