Oldest node on Blockchain?

[Keawe]

Who has the oldest node on the blockchain currently? ACINQ?

[ABCbits]

If you refer to people or group who run Bitcoin full node until now, i doubt it's ACINQ since they founded in 2014. I expect it's either,
1. Certain early adopter/developer who still use Bitcoin until today.
2. One of cryptocurrency company which run until today. I recall blockchain.com and BitPay founded in 2011.