I know of 2 working Burst Block Explorers and right now they both are down.

Burstcoin.info and Burstcoin.biz both come back as down..  I just cleaned my cache and all that nonsense...nothing.  Burstcoin.info has been down for a few days and Burstcoin.biz has been in a semi-working state for a fair amount of time.

*shrugs*