Twilio error 30006 means your SMS hit a landline or unreachable carrier. Learn why it happens, how to fix it step by step, and how to stop failed texts before you send.
Blog
US phone number format explained: learn the country code, area code, exchange code, and line number, see examples, and pick one style to keep your contact lists clean.
DNC scrubbing for insurance agents explained: learn how to check leads against federal, state, and internal DNC lists, avoid fines, and keep every campaign compliant.
Learn how a phone number validation API checks format, carrier, and line type, so your app stops wasting SMS spend on landlines, dead numbers, and fake sign-ups.
A litigator scrub checks your list against known TCPA plaintiffs before you send. Learn how it differs from a DNC scrub, what a TCPA litigator list is, and its cost.
HLR lookup tells you if a US mobile number is live. Carrier lookup returns the line type. Neither cleans a list alone: filter landlines and VoIP first, then verify.