The keycap emoji displays the number sign. It is mostly referred to as the “hashtag symbol” or “pound sign.” This symbol is enclosed in a blue square box. Users use this sign on social media when they want to refer to a certain hashtag.
NOTE: Keycap Number Sign was accepted in 1999 as part of Unicode 3.0 and added to Emoji 3.0 in 2016.
#️⃣ Hash Key
#️⃣ Pound Key
#️⃣ Number Sign
:hash: (Github, Slack)#️⃣emoji copy and pasteemoji meaningsKeycap Number Sign Emoji