YF-16	Prototype F-16, smaller than the full-scale production versions.
F-16A Block 1	First generation single-seat F-16 with black radome. They were all updated to Block 10 standard in the early 1980s. All have small tailplanes, small main air intake and Pratt & Whitney F-100 PW200 engines. Also, antenna placement and several panels are different from the Block 15 (and later), and it does not have the flood light on the leading edge of the tail fin.
F-16B Block 1	Two-seat version of the F-16A above.
F-16A Block 5	First generation single-seat F-16 with black radome. They were all updated to Block 10 standard in the early 1980s. All have small tailplanes, small main air intake and Pratt & Whitney F-100 PW200 engines. Also, antenna placement and several panels are different from the Block 15 (and later), and it does not have the flood light on the leading edge of the tail fin.
F-16B Block 5	Two-seat version of the F-16A above.
F-16A Block 10	First generation single-seat F-16 with grey radome. All have small tailplanes, small main air intake and Pratt & Whitney F-100 PW200 engines, however, the Norwegian, Belgian and Dutch ones have been modified with the Block 15 wings and tail planes at some point in their carreer. Also, antenna placement and several panels are different from the Block 15 (and later), and it does not have the flood light on the leading edge of the tail fin.
F-16B Block 10	Two-seat version of the F-16A above.
F-16A Block 15	Newer A/B models, but with large tail planes and improved avionics. Small main air intak, Pratt & Whitney F-100 PW220E engines and flood light on leading edge of the tail fin. Block 15 aircraft are capable of carrying the LANTIRN pods on the intake.
F-16B Block 15	Two-seat version of the F-16A above.
F-16A Block 20	Basically a new-built F-16AM Block 15 with extended brak chute housing. Used only by the Taiwanese Air Force and the USAF on behalf of the Taiwanese Air Force.
F-16B Block 20	Basically a new-built F-16BM Block 15 with extended brak chute housing. Used only by the Taiwanese Air Force and the USAF on behalf of the Taiwanese Air Force.
F-16A ADF	F-16A Block 15 equipped with IFF antennas in front of the cockpit and behind the lower lip of the main air intake, an ID search light on the left side behind the radome like the one found on some of the European F-16s, as well as the ability to carry and launch the AIM-7M missile – the only US F-16 to do so. Also, the fin base have a large bulge on either side.
F-16B ADF	Two-seat version of the F-16A above - without the IFF antennas though.
F-16AM	F-16A Mid-Life Update. Basically an F-16A airframe with F-16C avionics. Exists in both Block 10 and 15 versions, although most Block 10 airframes have been modified with the wings and the tail planes of the Block 15. External differences include IFF antennas in front of the cockpit, GPS antenna on the spine and landing/taxi lights on the leading edge of the nose wheel door.
F-16BM	Two-seat version of the F-16A above.
F-16C Block 25	First generation F-16C with new software and revised cockpit lay-out. Small main air intake and Pratt & Whitney F-100 PW220E engines. Compared to the F-16A the F-16C had a longer and wider tail fin base with a blade antenna on the leading edge. Block-25 aircraft now have the same software as the Block 30/32 aircraft.
F-16D Block 25	Two-seat version of the F-16C above.
F-16C Block 30	First F-16 Block with the General Electric F110 GE100 Alternate Fighter Engine. 86-0262 is first build F-16C Block 30 with large main air intake; prior to this the Block 30s are fitted with the small main air intake.
F-16D Block 30	Two-seat version of the F-16C above. 86-0044 first build F-16D Block 30 with large main air intake; prior to this the Block 30s are fitted with the small main air intake.
F-16C Block 32	Same software as the Block 30s, but equipped with Pratt & Whitney F100 PW220E and small main air intake.
F-16D Block 32	Two-seat version of the F-16C above.
F-16C Block 40	Known as F-16CG; second generation F-16C (Block 40/42 F-16Cs are called F-16CG to differentiate them from other Blocks). Block 40 F-16CG aircraft are exclusively fitted with the large main air intake and the General Electric F110 GE100 Alternate Fighter Engine. F-16CGs are often seen carrying the LANTIRN pods on the main air intake.
F-16D Block 40	Known as F-16DG; second generation F-16D (Block 40/42 F-16Ds are called F-16DG to differentiate them from other Blocks). Block 40 F-16DG aircraft are exclusively fitted with the large main air intake and the General Electric F110 GE100 Alternate Fighter Engine. F-16DGs are often seen carrying the LANTIRN pods on the main air intake.
F-16C Block 42	Also known as F-16CG; same equipment as the Block 40s but fitted with the Pratt & Whitney F100 PW220 engine and the small main air intake. F-16CGs are often seen carrying the LANTIRN pods on the main air intake.
F-16D Block 42	Also known as F-16DG; same equipment as the Block 40s but fitted with the Pratt & Whitney F100 PW220 engine and the small main air intake. F-16DGs are often seen carrying the LANTIRN pods on the main air intake.
F-16C Block 50	Known as F-16CJ; third generation F-16C (Block 50 F-16Cs are called F-16CJ to differentiate them from other Blocks). Equipped with a software package specifically designed around the AN/ASQ-213 High Speed Anti Radiation Missile (AGM-88B/C HARM) Targeting Pod. The HTS pod is placed on the right side of the main air intake. Block 50 aircraft are exclusively fitted with large main air intake and the General Electric F110 GE129 Increased Performance Engine.
F-16D Block 50	Known as F-16DJ; third generation F-16D (Block 50 F-16Ds are called F-16DJ to differentiate them from other Blocks). Equipped with a software package specifically designed around the AN/ASQ-213 High Speed Anti Radiation Missile (AGM-88B/C HARM) Targeting Pod. The HTS pod is placed on the right side of the main air intake. Block 50 aircraft are exclusively fitted with large main air intake and the General Electric F110 GE129 Increased Performance Engine.
F-16C Block 52	Also known as F-16CJ; same equipment as the Block 50, but fitted with the small main air intake and the Pratt & Whitney F100 PW229 Increased Performance Engine.
F-16D Block 52	Also known as F-16DJ; same equipment as the Block 50, but fitted with the small main air intake and the Pratt & Whitney F100 PW229 Increased Performance Engine.
F-16C Block 60	Export version of an upgraded F-16C Block 50. Capable of carrying conformal fuel tanks on top of the fuselage.
F-16D Block 60	Two-seat version of the F-16C above.
F-16E	Proposed designation for the single-seat production F-16XL supposed to be the next USAF strike aircraft but lost the competition to the F-15E Strike Eagle.
F-16F	Two-seat version of the F-16E above.
F-16N	US Navy F-16C used as aggressor. Retired early due to stressed airframes.
TF-16N	Two-seat version of the F-16N above.
F-16XL	Delta-winged F-16 converted from full-scale production airframes. Only two were ever built.