Hi, I can't surf blockchain.info nowadays, it seems the BTC blockchain is stuck or is this the only problem of blockchain.info, is btc blockchain still working?(I think so, or btc was dumped to 0) 
blockchain.info is down for maintenance, but blockchain is working as usual.
Here are some alternatives you may try for...
When you check an address balance or a transaction status online, which block explorer do you use ? If you run a service depending on a third party API, which block explorer's API you rely upon ?
Update: I'm listing out the outcome of this thread here...
1. https://blockchain.info/
2. https://blockr.io/
3. https://blockexplorer.com/
4. https://www.biteasy.com/
5. https://chain.so/btc
6. https://helloblock.io/
7. http://bitcoinchain.com/block_explorer
8. https://bkchain.org/btc
9. http://bitinfocharts.com/bitcoin/
10. http://www.blocktrail.com
11. http://explorer.chain.com/
Update: I'm listing out the outcome of this thread here...
1. https://blockchain.info/
2. https://blockr.io/
3. https://blockexplorer.com/
4. https://www.biteasy.com/
5. https://chain.so/btc
6. https://helloblock.io/
7. http://bitcoinchain.com/block_explorer
8. https://bkchain.org/btc
9. http://bitinfocharts.com/bitcoin/
10. http://www.blocktrail.com
11. http://explorer.chain.com/
A few more (they all seem to work well):
-BlockCypher: https://live.blockcypher.com/
-BitPay: https://insight.bitpay.com/
-blockinfo: http://blockinfo.org/
-Coinprism: https://www.coinprism.info/