<p>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:</p>

<p><a href="https://www.walletexplorer.com" rel="nofollow noreferrer">https://www.walletexplorer.com</a></p>

<p><a href="https://www.walletexplorer.com/address/1BCN1ugdKdWd9pQ8Am9hMhtHZfmbXzxE8a?from_firstbits=1BCN1u" rel="nofollow noreferrer">https://www.walletexplorer.com/address/1BCN1ugdKdWd9pQ8Am9hMhtHZfmbXzxE8a?from_firstbits=1BCN1u</a></p>

<p>Hope this helps :)</p>

CC BY-SA 3.0
2017-03-13T11:44:33.210Z
2017-03-13T11:44:33.210Z
Fuzzybear
<p>Blockchain.info has APIs to generate and resolve firstbits.</p>

<p>Get firstbits,</p>

<p><a href="http://blockchain.info/q/getfirstbits/1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF" rel="nofollow">http://blockchain.info/q/getfirstbits/1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF</a></p>

<p>Get address,</p>

<p><a href="http://blockchain.info/q/resolvefirstbits/1paypal" rel="nofollow">http://blockchain.info/q/resolvefirstbits/1paypal</a></p>

<p><a href="http://blockchain.info/q/resolvefirstbits/1ebay" rel="nofollow">http://blockchain.info/q/resolvefirstbits/1ebay</a></p>

<p><a href="http://blockchain.info/q/resolvefirstbits/1google" rel="nofollow">http://blockchain.info/q/resolvefirstbits/1google</a></p>

CC BY-SA 3.0
2013-10-18T14:58:04.857Z
What is the purpose of this?
bvpx
CC BY-SA 3.0
2013-10-18T15:22:18.903Z
@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
CC BY-SA 3.0
2014-04-22T05:25:00.230Z
This service seems to be out of order currently.
akaihola
CC BY-SA 3.0
2013-10-18T14:24:26.160Z
2013-10-18T14:24:26.160Z
vi.su.
<p>Input: any old Bitcoin address e.g. </p>

<p>1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF</p>

<p>Output: the FirstBits, in this case <strong>1BCN1u</strong></p>

CC BY-SA 3.0
2013-10-18T23:49:39.243Z
can you please tell where I can read about old and new bitcoin addresses?
Salvador Dali
CC BY-SA 3.0
2013-10-19T14:31:56.907Z
@SalvadorDali - I don't understand what you mean "old and new addresses"
ripper234
<firstbits>
Is there a web service that does reverse FirstBits lookup?
ripper234
# Is there a web service that does reverse FirstBits lookup?

(Asked by: username_0 on 2013-10-18)

Input: any old Bitcoin address e.g.

1BCNEPySL4gzzjg8NNyNsQYJWYmZwpgaPF

Output: the FirstBits, in this case **1BCN1u**

**Tags:** firstbits

> **Comments:**
> **username_1**: can you please tell where I can read about old and new bitcoin addresses?  
> **username_0**: @username_1 - I don't understand what you mean "old and new addresses"  

---

## 2 answers

### Answer by username_3 on 2013-10-18. Score: 4 | Accepted answer

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>

<http://blockchain.info/q/resolvefirstbits/1ebay>

<http://blockchain.info/q/resolvefirstbits/1google>

> **Comments:**
> **username_4**: What is the purpose of this?  
> **username_5**: @username_4:        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.  
> **username_6**: This service seems to be out of order currently.  

---

### Answer by username_2 on 2017-03-13. Score: 1

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 :)


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