twilio-lookup Purpose enables production-grade phone intelligence workflows using Twilio Lookup: validating phone numbers, normalizing to E.164, retrieving carrier metadata, line type (mobile/landline/VoIP), and caller ID / CNAM (where supported). Engineers use this to: - Reject invalid or unreachable numbers before sending SMS/WhatsApp/Voice (reduce 21211/30003 failures and cost). - Route traffic by line type (e.g., avoid SMS to landlines; choose Voice fallback for VoIP-heavy regions). - Enforce geo/region policy (e.g., block high-risk countries, require US/CA for 10DLC). - Enrich user profi…