Thank you! One correction - 10DLC is 10-Digit Long Codes. Sometimes this is called “Application-to-Person” (A2P), in contrast to "Person-to-Person" (real people

Thank you! One correction - 10DLC is 10-Digit Long Codes. Sometimes this is called “Application-to-Person” (A2P), in contrast to "Person-to-Person" (real people typing on our phones or equivalent). A 10DLC A2P SMS is an SMS sent from a 10-digit number and triggered by API (or anything else automated). Maybe the SMS is your doctor’s appointment confirmation system or an online retailer telling you your order has shipped… or maybe it’s a spammer. If it comes from a 10-digit phone number instead of a 5-6 digit short code, that’s 10DLC. In the last year or so, a registry for 10DLC A2P numbers has emerged (https://www.twilio.com/docs/sms/a2p-10dlc https://www.twilio.com/docs/sms/a2p-10dlc, https://support.bandwidth.com/hc/en-us/articles/4423826434583-10DLC-FAQ https://support.bandwidth.com/hc/en-us/articles/442382643458...), but adoption is mixed, enforcement is low, and end consumers/recipients don’t see any of it. There’s also “Person-to-Person” (P2P) 10-digit SMS, like you texting a friend. Those can also be used to spam (hook up a computer to a consumer SIM), but it’s much less common, especially in the US. Most US-originating SMS spam comes from 10DLC A2P numbers.