Code point
U+3381
Glyph appearance depends on your fonts.
U+3381
So<square> 006E 0041U+3381 SQUARE NA is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+3381
13185
㎁
㎁
E3 8E 81
3381
00003381
%E3%8E%81
\u3381
\u3381
\u3381
\3381