25 browser utilities
Every free tool is a wrapper around the same Good Guys API — perfect for one-off checks or quick investigations.
HLR Lookup
Query Home Location Register for any mobile number.
Carrier Identifier
Find the mobile carrier of a phone number instantly.
Portability Check
Detect if a number has been ported to a new network.
Spam Risk Score
Real-time spam & scam reputation lookup.
DNC Registry Check
Verify Do Not Call listing status.
Line Type Detector
Mobile, landline, or VoIP classifier.
E.164 Formatter
Normalize any phone into E.164 format.
Disposable Email Detector
Flag temporary / throwaway addresses.
MX Record Analyzer
Inspect a domain's mail exchangers.
SMTP Handshake
Test if an inbox actually accepts mail.
Email Syntax Validator
RFC 5322 compliant parser.
Role Account Finder
Detect info@, sales@, admin@ addresses.
Catch-All Detector
Check if a domain accepts any recipient.
Free Provider Check
Gmail, Outlook, Yahoo, Proton and more.
Domain Authority
SEO metrics for any domain.
IP Geolocation
City-level location for IPv4 & IPv6.
IP Abuse Risk Score
Aggregated blocklist + threat feed score.
VPN Detector
Identify commercial VPN endpoints.
Proxy Detector
Residential and datacenter proxies.
Tor Exit Node Check
Live Tor consensus lookup.
Datacenter IP Check
AWS, GCP, Azure and DO range detection.
ASN Lookup
Autonomous System Number → org info.
Reverse DNS
PTR record lookup for any IP.
WHOIS Lookup
Registration data for domains & IPs.
Port Reachability
Rate-limited port availability probe.