Blog
Guides and notes on address formats, test data and related workflows.
Decoding Hong Kong addresses: no ZIP, many floors
Flat, floor, block, estate: how Hong Kong packs a whole location into one line, and why there is no postal code.
Read article4 min read · 2026-08-01Why Delaware dominates US business registration
The Court of Chancery, franchise tax and the no-sales-tax combo that made a small state a corporate giant.
Read article5 min read · 2026-08-01The five US states with no statewide sales tax
Why Delaware, Montana, New Hampshire, Oregon and Alaska keep popping up in billing test data.
Read article6 min read · 2026-04-25Setting up a US Apple ID for testing storefronts
A practical walkthrough for developers who need a US storefront sandbox account.
Read article4 min read · 2026-03-23Inside US house numbering conventions
Odd/even sides, block-based grids and the logic behind American street numbers.
Read article4 min read · 2026-03-03US state abbreviations and when to use them
Two-letter USPS codes vs full state names, and how to keep form validation happy with either.
Read article4 min read · 2026-03-01Why realistic test data matters in QA
Random strings break validators; format-aware sample data finds real bugs earlier.
Read article5 min read · 2026-02-15How a US address is structured, line by line
Recipient, street line, city-state-ZIP: what each part of a standard American address means and how validators read it.
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