ZIP Code API VS Fast.com

• Comprehensive ZIP Code Data
  The ZIP Code API from zip-codes.com provides extensive data including ZIP code details, city information, state data, and geographic coordinates, making it a thorough resource for location-based lookups.
• Multiple Lookup Options
  The API supports various types of lookups including ZIP code to city/state, city/state to ZIP code, distance calculations between ZIP codes, and radius searches, offering flexible querying capabilities.
• Easy Integration
  The API uses standard REST-based HTTP requests and returns data in commonly used formats like JSON and XML, making it straightforward to integrate into most applications and programming languages.
• Distance and Radius Calculations
  The API includes built-in functionality for calculating distances between ZIP codes and finding ZIP codes within a specified radius, which is valuable for store locators, shipping estimates, and proximity-based features.
• Well-Documented Endpoints
  The API provides clear documentation for its various endpoints and parameters, helping developers understand available features and implement them correctly without extensive trial and error.

• Simplicity
  Fast.com has a clean and straightforward interface, making it very easy for users to test their internet speed without any distractions or complications.
• Ad-Free
  The website does not contain any advertisements, providing a seamless and uninterrupted user experience.
• Integration with Netflix
  Fast.com is created by Netflix, which ensures that the speed test results are optimized for streaming services, giving users a reliable indicator of how well they can stream content on the platform.
• Quick Results
  The speed test begins automatically as soon as the website loads, providing users with rapid results without the need for additional clicks or inputs.
• Mobile-Friendly
  Fast.com is optimized for mobile devices, making it easy for users to test their internet speed on smartphones and tablets.

Possible disadvantages

• Limited Metrics
  Fast.com primarily focuses on download speed and does not provide as comprehensive a range of metrics as some other speed test websites, such as upload speed, latency, and jitter.
• No Server Selection
  Users cannot choose which server to run the speed test against, which can sometimes result in less accurate measurements for specific network conditions.
• No Historical Data
  Fast.com does not offer features to save or track historical speed test results, limiting users' ability to monitor their internet performance over time.
• Lack of Customization
  There are no options to customize the test parameters, such as test duration or concurrency levels, which might be relevant for more advanced users.
• Geared for Streaming
  Since Fast.com is tailored for Netflix streaming, it may not fully represent other usage scenarios, such as gaming or file downloads, which require different network performances.

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Speedtest.net vs Fast.com | why different results ?

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Tracking ZIP Code API since May 2026.

• I Built a Fast.com for LLMs: Introducing iamspeed.dev

  That is exactly how fast.com works for internet speed tests. You open it, it runs, you see a number. Done. - Source: dev.to / 5 months ago

• Streaming the 2026 Winter Olympics: A Developer's Guide to Live Sports IPTV

  Pro tip: Run a speed test immediately before the event. Don't trust your "up to 100 Mbps" ISP claim. Use fast.com or speedtest.net to get real numbers. - Source: dev.to / 8 months ago

• Downdetector, Speedtest sold to IT service provider Accenture in $1.2B deal

  Speedtest has always seemed incredibly sketchy to me, I don’t know if others share this sentiment. https://fast.com completed the test faster than speedtest loads the site. - Source: Hacker News / 8 months ago

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