Short code vs long code when migrating a small Twilio SMS app without downtime
We run a small Twilio-based SMS service (a few long-code numbers, roughly 2k messages/day) and are planning a move to an alternate carrier. The hard constraint is zero downtime: inbound and outbound messages must keep flowing during the cutover. The open decision is whether to keep using long codes on the new carrier or take the opportunity to move to a dedi
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