Submitting new block to blockchain

Supposed that I’ve managed to mine a brand new block that meets all necessities efficiently by constructing my very own script that may accumulate transactions and add them to new block and hashing the brand new block appropriately. All this may be carried out in 3 minutes inside Linux server. Nonetheless, once I tried to submit it, I did not discover anyway of doing so. Is there any particular web site to submit it for broadcasting?. please, clarify to me with examples?
thanks upfront