The Braille Pattern Dots-1247 symbol (⡋). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Braille.
The quickest way is to copy ⡋ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
⡋ is U+284B (decimal 10315).
Use ⡋ in HTML to render ⡋ on a web page.
On Windows you can type it with Alt+10315 (hold Alt and enter the number on the numeric keypad).
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