FN meaning in Messaging ?

Answer:

INFO: Full form for FN is Forum Notice in Messaging category
FN also has other full forms in other categories mentioned below.

Full Form	Category
Figure Name	Academic & Science
Filter Nucleic	Academic & Science
First Number	Academic & Science
Function Numbering	Academic & Science
First Nation	Academic & Science
Fine Noon	Academic & Science
Fiscal Note	Accounts and Finance
Footnote	Business
Fragmentary Network	Business
Freight Note	Business
Fabrique National	Business
Fowler Nordheim	Business
First National Financial Income Fund	Business
Family Night	Community
Financial News	Community
Forest News	Community
Freaking News	Community
Frans Noltee	Community
Funeral Notice	Community
Friends and Neighbors	Community
Fortnite	Computing
File Name	Computing
Formatted Name	Computing
Frequency and Number	Electronics
Freedom Ninja	General
Fratelli Nistri	General
Foreign National	General
for Ana	General
Footsoldier Number	General
For The Number	General
Flat Nose	General
For Non	General
Friday Night	General
Future Networks	General
Family Neglect	General
Forgotten Nation	General
Forente Nasjoner	General
Flame and	General
For Then	General
Force and	General
Fake Number	General
Frank Nathan	General
Face Number	General
Fabrique Nationale	General
Fonar Night	General
FrivolousNecessity (pattern maker)	General
For the Nth	General
for an	General
Food Network	General
First Nations	General
Fortnightly	General
Fuerza Nueva	Governmental
Fingerprint Number	Governmental
Factory New	Governmental
Fireman	Governmental
FARUKHNAGAR	Indian Railway Station
Fuerzas Navales	International
Fundación Natura	International
Front National	International
Fast Note	Internet
For Now	Internet
Function Name	Maths
Fibonacci Number	Maths
False Negative	Maths
Forum Notice	Messaging
Fighter Naval	Military and Defence
Field Number	Military and Defence
Force Network	Military and Defence
Foreign Nation	Military and Defence
Formula Nippon	Sports
Fore Noon	Time