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Versions
Do 217 A-0: Pre-production series with two 1,100 PS (809 kilowatts (1,085 hp)) DB 601B inline engines, used for reconnaissance missions. Only eight aircraft were built.
Do 217 C-0: Pre-production bomber, DB 601B engines, increased defensive armament. Only four built.
Do 217 E-0: Pre-production bomber with deepened fuselage and powered by two 1,560 PS 1,147 kilowatts (1,538 hp) BMW 801A engines.
Do 217 E-1: Production bomber with five 7.92 mm (.312 in) MG 15 machine guns and one 15 mm MG 151 cannon for defence.
Do 217 E-2: Bomber with dive bombing capabilities, with three 7.92 mm MG 15s, two 13 mm (.51 in) MG 131 machine guns, one 15 mm MG 151, and a 4,000 kilograms (8,800 lb) bombload.
Do 217 E-3: Level bomber, seven 7.92 mm (.312 in) MG 15s and one forward-firing 20 mm MG FF cannon.
Do 217 E-4: BMW 801L engines.
Do 217 E-5: E-4 with extended wingspan, modified on production line with added Kehl radio control gear to launch Henschel Hs 293 missiles.
Do 217 G: In January 1940 Dornier produced a data sheet for a Do 217 G with BMW 801 engines with the same airframe as a Do 217 E-1. None were built.
Do 217 H: Conversion of a Do 217 E with DB 601 engines fitted with experimental turbo-superchargers.
Do 217 K: Bomber with redesigned forward fuselage with stepped windscreen eliminated, a common World War II German bomber cockpit design concept adopted just before the start of World War II initially on earlier Heinkel bombers (He 111 P and He 177 A). Two 1,560 PS BMW 801L radial engines.
Do 217 K-1: Standard bomber version.
Do 217 K-2: Extended wingspan with Kehl radio gear to carry Fritz X bombs on underwing racks.
Do 217 K-3: Similar to K-2, but capable of carrying both Henschel Hs 293 or Fritz X.
Do 217 M: Bomber; Do 217 K with 1,750 PS 1,287 kilowatts (1,726 hp) DB 603A inline piston engines.
Do 217 M-1: Equivalent to the K-1.
Do 217 M-3: DB 603A-engined equivalent to the K-3.
Do 217 M-5: Kehl radio gear-equipped Henschel Hs 293 carrier with a single missile mounted semi-externally beneath the fuselage.
Do 217 M-11: Similar to the K-2 with extended wingspan, Kehl control gear and Fritz X bombs.
Do 217 J: Night fighter based on the Do 217 E. Solid nose with four 7.92 mm (.312 in) MG 17 machine guns and four 20 mm MG FFs.
Do 217 J-1: Night intruder version.
Do 217 J-2: Dedicated night fighter. Bomb bays removed.
Do 217 L: Modified version of the Do 217 K with rearranged cockpit and defensive armament. Only two built.
Do 217 N: Night fighter based on the Do 217 M. Armament similar to Do 217 J but with improved 20 mm MG 151/20 cannons replacing the 20 mm MG FFs plus the addition of four 20 mm MG 151/20s as Schräge Musik.
Do 217 N-1: Similar to J-2.
Do 217 N-2: N-1 with defensive gun turret and bomb bay equipment removed to reduce weight.
Do 217 P: High-altitude reconnaissance aircraft with two 1,860 PS 1,368 kilowatts (1,835 hp) DB 603B supercharged by a DB 605T in the fuselage (the Höhenzentrale, or "HZ" system) with a ceiling of 16,155 metres . Three Do 217 P-0 pre-production aircraft only.
Do 217 R: Dive bomber with increased wing area, greater defensive armament, and dive brakes. Four prototypes built.

Germany
Luftwaffe
Nachtjagdgeschwader 1
Nachtjagdgeschwader 2
Nachtjagdgeschwader 4
Nachtjagdgeschwader 5
Nachtjagdgeschwader 6
Nachtjagdgeschwader 100
Kampfgeschwader 2
Kampfgeschwader 6
Kampfgeschwader 40
Kampfgeschwader 100
Kampfgeschwader 200

Italy
Regia Aeronautica (Italian Royal Air Force) operated six Do 217-J-1 and six J-2

Switzerland
Swiss Air Force operated a single Do 217N-2, interned after landing at Basel in 1944 or 1945 and was in use until at least 1946.[132]

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