The only entities that benefit from sms.codes.oi are the website owners (collecting your data and showing you malware ads) and identity thieves (harvesting OTPs).
The phone didn't buzz. It screamed. A long, continuous vibration that felt like a heartbeat. A final message appeared from a new, 10-digit long code : “You found the exit. Now, wake up.” sms.codes.oi
In the real world, these codes serve specific functional roles: The only entities that benefit from sms