A6, A 6 or A-6 can refer to:

Biology

• British NVC community A6 (Ceratophyllum submersum community), a British Isles plants community
• Xenopus A6 kidney epithelial cells in cell culture
• Subfamily A6, a Rhodopsin-like receptors subfamily

Transportation

• A6 road, in several countries
• Route A6 (WMATA), a bus route operated by the Washington Metropolitan Area Transit Authority
• bus between London, England, and Stansted Airport, England, run by National Express Coaches
• A6, the IATA code for Air Alps Aviation
• United Arab Emirates aircraft registration code

vehicles

• A-6 Intruder, a twin-engine, mid-wing all weather US Navy medium attack aircraft manufactured by Grumman, in service from 1962 to 1997
• Arrows A6, a 1983 British racing car
• Audi A6, an executive luxury car produced by Audi from 1994 to present
• Focke-Wulf A-6, a WWII German Focke-Wulf aircraft
• HMS A6, a British A class submarine of the Royal Navy, built around 1903
• Maserati A6, various Italian cars
• Prussian A 6, a 1913 German railbus
• A6, an aggregate series (A1 to A12) German rocket design in World War II, never implemented
• A-6, formerly the USS Porpoise (SS-7), a Plunger class submarine of the United States Navy, built in 1900

Other things

• A-6 tool steel, an air-hardening SAE grade of tool steel
• Hanlin eReader A6, an ebook reader
• A6, an ISO 216 international standard paper size (105 148 mm)
• A6, or A (musical note) above soprano C, the highest note written or acknowledged as musical in classical music
• A6, the designation for air force headquarters staff concerned with signals, communications or information technology
  • In the United Kingdom, the A6 Air CIS (Computers & Information Systems) branch, also known as JFACHQ, UK Joint Force Air Component Headquarters
• A6, the name of a disease in the short story "Night Surf" by Stephen King
• A-6, a renamed version of the US Security Group in the 1997 comic book movie Spawn
• A 6, a Swedish regiment, according to the list of Swedish artillery regiments

A06

• A.06, a track title on Linkin Park Underground Linkin Park fan club compilation
• A06 (band), a Massachusetts-based rock band associated with multi-instrumentalist Casey Crescenzo
• ATC code A06 Laxatives, a subgroup of the Anatomical Therapeutic Chemical Classification System
• HMNZS Monowai (A06), a 1975 Royal New Zealand Navy hydrographic survey vessel
• R ti Opening code in the Encyclopaedia of Chess Openings

cs:A6 de:A6 eo:A6 es:A6 fr:A6 ko:A6 hr:A6 it:A6 lt:A6 nl:A6 ja:A6 no:A6 pl:A6 pt:A6 sk:A6 sr:A6 sv:A6 uk:A6