National Block List Day

Happy people of diverse ethnicities, wearing sunglasses and sunscreen, enjoying various outdoor activities at the beach on National Block List Day..
National block list day illustration

Welcome to, where we uncover the fascinating internet history behind all your favorite national days! Today, we're diving deep into the world of National Block List Day. Get ready to learn and have some fun!

When is Block List Day?

It's national block list day on the 12th June.

The Origin of National Block List Day

Have you ever received an unwanted call or email from an unknown number or address? We've all been there, annoyed by pesky telemarketers and spammers. But fear not, for National Block List Day celebrates the power of blocking those unwanted intrusions!

Back in the early days of the internet, when trolls roamed the digital landscape freely, a brilliant individual came up with the concept of block lists. These block lists were created to protect users from harassment, spam, and other forms of online annoyance.

On June 12, 2015, National Block List Day was born to honor the advancements in blocking technology. It's a day to celebrate the tranquility and peace of mind that comes from having control over your online interactions.

How to Celebrate National Block List Day?

To fully embrace this glorious holiday, it's time to unleash your inner blocking ninja! Here are a few ways you can celebrate:

  1. Block that spam: Take a few minutes to review your spam filters and block any unwanted emails. Your inbox will thank you.
  2. Telemarketer-free zone: Register your phone number with the Do Not Call Registry to keep those annoying telemarketing calls at bay.
  3. Social media clean-up: Unfriend, unfollow, and block those individuals who bring negativity to your digital world.
  4. Install a blocker: Explore the wide range of browser extensions and apps available to block unwanted content and pop-up ads.

Did You Know?

Did you know that the world's largest block list, known as the "Spamhaus Block List" (SBL), contains over two billion IP addresses? That's a whole lot of blocked spammers!

History behind the term 'Block List'


The Birth of Online Communities

In 1989, the concept of online communities began to take shape with the emergence of the internet. People started connecting and communicating with each other via various platforms, forming virtual communities where they could share ideas, thoughts, and experiences.

Early 2000s

The Rise of User-Generated Content

With the advent of Web 2.0 technologies in the early 2000s, online communities experienced exponential growth. Platforms like forums, social networking sites, and comment sections allowed users to generate and share content. As these communities expanded, so did the need for moderation and control over the content shared.


Introducing Blocking and Blacklisting

Around the mid-2000s, online platforms started implementing features that allowed users to block or blacklist individuals they did not want to interact with. This feature provided users with a sense of control over their online experiences and helped maintain a certain level of privacy and security.


Twitter Introduces 'Block' Functionality

In 2004, the popular social media platform Twitter was launched. As Twitter gained popularity, it became necessary to address issues like harassment and unwanted interactions. In 2008, Twitter introduced the 'block' functionality, allowing users to prevent specific accounts from contacting them or viewing their tweets.

Early 2010s

Expansion of Blocking Features

As the online presence of individuals and businesses grew, various social media platforms and online communities expanded their blocking functionalities. These features enabled users to maintain a safe and harassment-free environment by selectively limiting their interactions with specific individuals or groups.

Did you know?

Did you know that the world's largest block list, known as the "Spamhaus Block List" (SBL), contains over two billion IP addresses? That's a whole lot of blocked spammers!


awareness fun

First identified

12th June 2015

Most mentioned on

12th June 2015

Total mentions


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