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Posted by Gordon Burditt on 03/15/07 23:04
>>> Oh, you mean the one that's eight years old and therefore useless?
>>>
>>> Zipcodes change daily. Updates come out quarterly. So that's about 30
>>> updates behind, plus or minus.
>>>
>>> So no, it's not "still good" for serious work. I would *never* want a
>>> customer to see "I'm sorry, your zip code does not exist".
>>>
>>
>> OP kind of said "for educational purpose".
>
>I don't care if it is for educational purposes. I still wouldn't want
>my customers to see "I'm sorry, your zip code does not exist" because
>I'm using an 8-year old database.
So never give out that error message.
In the USA, zip codes are clustered by the first 3 digits. If you don't
recognize a specific 5-digit zip code, use the 3-digit version. It's
less accurate, but it should get you in the general area. I'm not sure
if there are any 3-digit combinations that aren't in use for an actual
geographic area.
I don't know whether the same locality applies to Canada.
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