That's incredible, I had no idea! Astonished face with wide open mouth and eyes: overwhelmed with surprise, completely shocked or sheer incredulity. Can hardly believe what just happened!
The astonished face emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the smileys and emotions category. Because the astonished face emoji has been around for quite some time, it should display correctly in the majority of operating systems.

Here you'll find a range of emojis on how they will look using different operating systems. Each company will design an emoji according to their own style. Here we have listed the most popular platforms around to see how the emoji will look on their screens.

Short Codes:

:astonished:

Hex Code:

😲

Decimal Code:

😲

Punycode:

xn--t38h

URL Escape Code:

%F0%9F%98%B2

JavaScript & JSON:

\ud83d\ude32

CSS Code:

content: '\01F632';