According to Wiktionary the word "second" can be pronounced one of two ways in the US: /ˈsɛk.(ə)nd/ and /ˈsɛk.(ə)nt/
I've googled to try to find anything about the difference between these pronunciations, be it morphophonemic or simply a regional variation. However my search was to no avail as "second" is a common word, often with results of alternative/second pronunciations of other words popping up.
Can anyone enlighten me on why there is a difference in pronunciation of this word?
For reference, I'm from the US South and I say it with a final "t."