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xsspup :blobhaj_hearttrans:

Corrections / additional:
- @alexhelvetica pointed out that I missed the carve out for Alpurrurulam NT (4825)
- @simon_w raised another fallacy that you can't treat postcodes as numbers (0872 would become 872)
- @Dangerous_beans mentioned that postcodes can't be mapped to other geographic coding schemes like LGAs
- @ChlorideCull / @devopscats points out that postcodes can move / change
- @whyrl fallacy: A postcode can be mapped to a geographical location (see e.g. defence force personnel codes)

30 comments
Whyrl

@xssfox Another fallacy:
- A postcode can be mapped to a geographical location (see e.g. defence force personnel codes)

scy

@whyrl Sorry, can you elaborate on this or point me to a website explaining it? I can't seem to find anything about this, but I'd like to know more :)

DeterioratedStucco

@scy @whyrl
I think that the postcode becomes organisational rather than geographical? So Flight Lieutenant J Smith's post will go to the air force and follow Smith's duty posting via their parent unit, rather than Smith's actual location (which might change radically at short notice and might also be classified).
(Caveat: interested amateur, not Australian.)

Whyrl

@scy Postcode 2890 is used for sending to Australian Defence Force personnel, who may be located on a ship overseas. auspost.com.au/sending/guideli

jacqueline 🌟

@xssfox areas may also have several postcodes; e.g. ryde’s p.o. box postcode is 1680, but regular addresses in ryde use 2112

artemist

@jacqueline @xssfox My PO box can be referenced as:
PO Box 8003
New York NY 10116-8003

or
421 8th Ave #8003
New York NY 10001-7800

or
421 8th Ave Unit 8003
New York NY 10116-9013

Same box, and the post office is physically in 10001 but they invented 10116 just for PO boxes in this one post office.

jacqueline 🌟

@artemist @xssfox the phrasing “can be referenced as” is making me think of a kind of post code descriptivism.

a post code is valid iff it gets me my package

artemist

@xssfox A common fallacy I see is "2 apartments in the same building have the same postcode" (generally you'll have at least 2 different 9-digit postcodes for even a small apartment building in the US)

Also "there is only 1 form of postcode in a country". In the US there are "delivery point codes" that uniquely identify a mailbox, they are 11 digits long but normally only printed in a barcode (e.g. 10116-800303). The first 5 digits of that are what humans normally write (e.g. 10116), and the first 9 digits are what commercial mailers print in the address block (10116-8003).

@xssfox A common fallacy I see is "2 apartments in the same building have the same postcode" (generally you'll have at least 2 different 9-digit postcodes for even a small apartment building in the US)

Also "there is only 1 form of postcode in a country". In the US there are "delivery point codes" that uniquely identify a mailbox, they are 11 digits long but normally only printed in a barcode (e.g. 10116-800303). The first 5 digits of that are what humans normally write (e.g. 10116), and the first...

xsspup :blobhaj_hearttrans:

@artemist I mean it's also a fallacy that a building will be within the same country

Alex Von Kitchen

@xssfox you might want to add an flag to my one there that it might be wrong. or just really confusing

Ben Aveling

@Dangerous_beans @xssfox @devopscats @whyrl @ChlorideCull @simon_w @alexhelvetica Plus: internationally, not all postcodes are 4 digit numbers. In Ireland postcodes are 7 digits, include letters and numbers, and represent individual buildings or even individual apartments. Singapore is a bit similar.

xsspup :blobhaj_hearttrans:

There's a bunch of fun replies that I haven't been able to keep up with entirely, but here's another fun postcode : 4825

It's non contiguous and has all these little broke on sections. It also crosses sate borders

Daniel Carosone

@xssfox who has been gerrymandering the postcodes?!

Garth Kidd

@xssfox you’re SO close to being able to score post-codes on how cursed they are. I’ll just leave this here til.simonwillison.net/sqlite/s

GunChleoc

@xssfox The most common programmer's fallacies I encounter are:

- Sentences start with a noun
- Nouns have 1 singular form that maps to the number 1, and 1 plural form that maps to all other numbers

Both break down as soon as you ask people to translate your software to a language unlike English.

GunChleoc

@xssfox Two more postcode fallacies that I have encountered in the wild:

1. Postcodes have a maximum of 5 characters. Good luck entering a UK postcode into that German form...

2. British English for "Zip" is "Postcode". Send a zip file in Skype to get a good laugh

#i18n

Screenshot of a file for download in Skype. After the file size, it says "Postcode"
xsspup :blobhaj_hearttrans:

Fuck the people who say we shouldn't care about the users in 0872 because there's so few of them (~18k)

Many of these users are important and amazing. Many are vulnerable and need support. Entire communities of people.

Jean-Baptiste "JBQ" Quéru

@xssfox It would make more sense not to take care of US zip code 10118, since nobody lives there.

Jean-Baptiste "JBQ" Quéru

@xssfox The previous post is a joke, 10118 is the Empire State Building in New York City, which indeed has zero pemanent residents, but about 300 businesses, 7000 employees, and more than a billion US dollars of payroll.

Aphelion

@xssfox it would still matter even if there were only 18 people but...18k people is actually rather a lot 😳

cliffordheath

@xssfox Even Melbourne 2000 has discontiguous sections

sarah

@xssfox Storing as a number gets doubly fun if you use a postcode like 0270, and something ends up converting it from octal and the post gets sent to 184 instead.

sarah

@xssfox Another fallacy from this part of the world: Postcodes can be used as a way to show people’s semi-anonymised location. I remember signing up for a website and realising that the postcode I gave them was public on my profile, which was concerning to me since in Ireland, postcodes map to a single delivery point, so my postcode is just my apartment.

💬

@xssfox @simon_w or if you pass it to a dumb enough strtol() you’ll get 570 and be *really* confused…

DFYX

@xssfox More fallacies:
- Each address will only have one postcode. Nope, The whole town of Büsingen am Hochrhein has German code 78266 and Swiss code 8238. Similar for some towns on the border between Germany and Austria.
- Each address will only have one postcode per country. Again no. In Germany it's common for places that receive a lot of mail (some companies and even some university dorms) to get a special postcode in addition to the one their neighbors have.

Vincent M.

@xssfox @alexhelvetica @simon_w @Dangerous_beans @ChlorideCull @devopscats @whyrl in UK, postcodes contains letters, in France we have postcodes starting with 0 too. In France, companies can have personal postcode called CEDEX which is different from real postcode.

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