When sending to a list greater than 200 contacts, you may notice an additional number in your Heymarket Inbox. The additional number is from our number provisioning feature which allows you to send a mass text to greater than 200 contacts. This number can also be used to receive inbound messages.
With current texting capabilities, long-form of 10 digit numbers can send up to 200 numbers before being flagged as a potential spam number. This number provisioning is what allows Heymarket users to send >200 contacts at one time. Our sticky sender feature which allows contacts to only communicate with the number they initially received a message from (or sent a message to) prevents any potential confusion (or messages from multiple numbers) from the contacts point of view.