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Input: any old Bitcoin address e.g.
1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF
Output: the FirstBits, in this case 1BCN1u
Is there a web service that does reverse FirstBits lookup?
Answers
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Blockchain.info has APIs to generate and resolve firstbits.
Get firstbits,
http://blockchain.info/q/getfirstbits/1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF
Get address,
http://blockchain.info/q/resolvefirstbits/1paypal
What is the purpose of this? – bvpx – 2013-10-18T14:58:04.857
1@bvpx: Https://en.bitcoin.it/wiki/Firstbits tells us that firstbits are basically a way for bitcoin users to type a few less key strokes (an address shortner for bitcoin addresses). However there are more than a few downsides to it. I hope the information is helpful.n Just start at the beginning and learn everything bitcoin wiki touches on. Feel reese to ask more questions. I always suggest using the search engine before posting so you keep good rep. You can always privately message me. But I am over on my altcoins pool mostly. – Joe White – 2013-10-18T15:22:18.903
2This service seems to be out of order currently. – akaihola – 2014-04-22T05:25:00.230
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Having seen that yes blockchain.info no longer offers this service I was able to find only one other Block explorer that do offer the FirstBit lookup on addresses:
https://www.walletexplorer.com
https://www.walletexplorer.com/address/1BCN1ugdKdWd9pQ8Am9hMhtHZfmbXzxE8a?from_firstbits=1BCN1u
Hope this helps :)
can you please tell where I can read about old and new bitcoin addresses? – Salvador Dali – 2013-10-18T23:49:39.243
@SalvadorDali - I don't understand what you mean "old and new addresses" – ripper234 – 2013-10-19T14:31:56.907