n's Foreign Minister, Gohar Ayub Khan, believed that the Foxbat photographed strategic installations near the capital, Islamabad.5051
- Reconnaissance prototypes. Two prototypes (Ye-155R-1 and Ye-155R-2) followed by four pre-production aircraft fitted with reconnaissance equipment.52
- Interceptor fighter prototypes. Two prototypes (Ye-155P-1 and Ye-155P02) followed by nine pre-production aircraft.53
- Designation applied to prototypes and pre-production aircraft (Ye-155R-1, Ye-155R-3 and Ye-155P-1) used for record breaking purposes in official documentation supplied to the Fédération Aéronautique Internationale.54
- Single-seat all-weather interceptor fighter aircraft, powered by two Tumansky R-15B-300 turbojet engines, fitted with RP-25 Smerch-A1 radar and armed with four R-40 air-to-air missiles. NATO designation Foxbat-A.55
- Improved single-seat all-weather interceptor fighter aircraft, which entered service from 1979. Fitted with R-15BD-300 engines and new N-005 Saphir-25 (RP-25M) Pulse-Doppler radar with look-down/shoot down capability, based on the radar of the MiG-23ML. Could be fitted with four R-60 air-to-air missiles replacing outermost two R-40 missiles. Late examples fitted with an undernose IR search and track system. NATO designation Foxbat-E.56
- Upgrade of surviving MiG-25Ps to MiG-25PD standard from 1979. NATO designation Foxbat-E.57
- Single MiG-25PD modified by addition of electronic countermeasures (ECM) equipment.57
- Single MiG-25PD modified with retractable in-flight refuelling probe.57
- Two testbeds (one converted from a MiG-25RB and one from a MiG-25PD) for more powerful (98.04 kN (22,045 lbf) dry, 129.71 kN (29,166 lbf) with afterburner) engines.58
- Designation applied to MiG-25M when used for record breaking in 1975 and 1977, including setting an absolute altitude record of 37,650 m (123,524 ft) on 31 August 1977.58
- Izdelye 99
- Two aircraft used as testbeds for Soloviev D-30F turbofan as later used in MiG-31.56
- Single-seat high-altitude daylight reconnaissance aircraft, fitted with cameras, and ELINT equipment. NATO codename Foxbat-B.59
- Single-seat reconnaissance-bomber derivative of MiG-25R, fitted with improved reconnaissance systems and a Peleng automatic bombing system. The aircraft can carry a bombload of eight 500 kg (1,102 lb) bombs. Entered service in 1970. NATO codename Foxbat-B.59
- Modernised single-seat reconnaissance-bomber with revised Elint equipment (SRS-9 Vraz). NATO codename Foxbat-B.60
- Further improved reconnaissance-bomber, with Tangaz Elint equipment. NATO codename Foxbat-B.61
- Dedicated night reconnaissance aircraft, carrying 10 photoflash bombs under the fuselage. Only single prototype built. NATO codename Foxbat-B.61
- Conversion of eight reconnaissance aircraft for high-altitude radiation sampling role. Used to monitor Chinese nuclear tests between 1970 and 1980. NATO codename Foxbat-B.61
- Single-seat dedicated Elint aircraft, with Kub-3K Elint system. Bombing capability retained but cameras not fitted. NATO codename Foxbat-D.61
- Conversion of MiG-25RBK with new Shar-25 Elint equipment. NATO codename Foxbat-D.62
- Single-seat radar-reconnaissance aircraft, with Sabla-E side looking airborne radar (SLAR). Cameras not fitted but bombing capability retained. NATO codename Foxbat-D.62
- MiG-25RBS fitted with more capable Shompol SLAR. NATO codename Foxbat-D.62
- MiG-25BM "Foxbat-F"
- Single-seat defence-suppression aircraft, armed with Kh-58 or Kh-31 air-to-surface missiles.63
- Two-seat conversion trainer for MiG-25P interceptors. Fitted with a new nose section with two separate cockpits. It has no radar and no combat capability. NATO codename Foxbat-C.58
- Two-seat conversion trainer for reconnaissance versions. Fitted with MiG-25R navigation system. NATO codename Foxbat-C.62
- Designation given to single MiG-25PU used by Svetlana Savitskaya to establish a number of women's speed and height records, starting with speed over a 15–25 km course of 2,683.45 km/h (1.667.47 mph) on 22 June 1975.5864
- Algerian Air Force – 11 MiG-25s in service, including five Mi