Real-time Validation at Opt-in: When collecting phone numbers via web forms or apps, integrate real-time phone number validation APIs. These APIs can instantly check the format, country code, and sometimes even the type (mobile/landline) of the number entered, preventing bad data from entering your system.
Double Opt-in for SMS: For SMS marketing, a double opt-in process (where a user confirms their subscription via a reply text) is a robust way to ensure the number is active and the user is genuinely interested.
Regular List Hygiene and Scrubbing:
Phone Number Validation Services: Regularly (e.g., monthly or quarterly) run your entire contact database through professional phone number validation services. These services can:
Identify disconnected numbers.
Flag invalid or Prioritize First improperly formatted numbers
Differentiate between landlines and mobile numbers (crucial for SMS).
Sometimes identify numbers kenya phone number list associated with reassigned numbers databases (e.g., in the US, the Reassigned Numbers Database).
Duplicate Removal: Eliminate duplicate entries from your lists.
Integrate with Dialer and SMS Platforms:
Automatic Suppression: Professional auto-dialers and SMS gateways often automatically detect disconnected numbers or failed deliveries and can suppress these numbers from future campaigns. Ensure this feature is active and that these numbers are china phone number added to your internal Do Not Contact (DNC) list.
Delivery Reports: Analyze delivery reports from your SMS gateway. High rates of “undeliverable” or “failed” messages are a clear indicator of dead numbers.
Monitor Campaign Performance Metrics
Call Connect Rates: A sudden drop in call connect rates (percentage of calls that successfully connect to a person or voicemail) often indicates a high volume of dead numbers.
SMS Delivery Rates: Monitor ao lists SMS delivery success rates. Consistent low rates point to issues with number validity.
Agent Feedback: Empower telemarketing agents to provide feedback on disconnected numbers, “out of service” messages, or “number changed” responses.
Maintain a Comprehensive Internal Do Not Contact (DNC) List:
While primarily for opt-outs, your internal DNC list should also capture numbers that have been identified as definitively “dead” to prevent future calling attempts.