http://mirror1.bitcoindexplorer.com/ is frozen at block height 883,682 due to being out of storage space. I rented 1.9 TB from a company in NZ and allocated 1.5TB to bitcoind + bitcoindexplorer. I could allocate the remaining .4TB to allow the mirror to continue, but I haven't decided if I am willing to because I pay roughly $1,500-$2,000 a year to keep that server running, and afaik no one uses it. My lease just expired and that mirror will likely be shutdown all together soon. If you have interest in it staying alive please leave a comment below.
Very Secure