Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

789254

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-KJA · BOEING 737-800

Hex
789254
Octal
36111124
Decimal
7,901,780
Country
CN
Tail
B-KJA
Type
B738
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
364
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S 789254.

Country allocation

The ICAO 24-bit address 789254 falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
HGB309 Greater Bay Airlines 43 2026-07-19
HGB323 Greater Bay Airlines 33 2026-07-23
HGB308 Greater Bay Airlines 28 2026-07-19
HGB322 Greater Bay Airlines 25 2026-07-23
HGB341 - 23 2026-07-07
HGB320 Greater Bay Airlines 15 2026-07-26
HGB321 Greater Bay Airlines 14 2026-07-26
HGB8236 - 12 2026-07-17
HGB703 - 12 2026-07-17
HGB340 - 12 2026-07-07
HGB839 Greater Bay Airlines 10 2026-07-25
HGB838 Greater Bay Airlines 10 2026-07-25
HGB705 Greater Bay Airlines 10 2026-07-19
HGB8235 Greater Bay Airlines 9 2026-07-17
HGB702 - 8 2026-07-17
HGB704 Greater Bay Airlines 6 2026-07-19
HGB231 Greater Bay Airlines 6 2026-05-14
HGB383 Greater Bay Airlines 5 2026-07-22
HGB2387 Greater Bay Airlines 5 2026-06-01
HGB232 Greater Bay Airlines 5 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HGB382D - Jul 26, 22:10 UTCJul 26, 22:25 UTC15m
2026-07-26 HGB382D - Jul 26, 19:30 UTCJul 26, 21:00 UTC1h 30m
2026-07-26 HGB321 NRT → HKG Jul 26, 12:45 UTCJul 26, 16:50 UTC4h 5m
2026-07-26 HGB320 HKG → NRT Jul 26, 05:40 UTCJul 26, 10:05 UTC4h 26m
2026-07-25 HGB839 KWL → HKG Jul 25, 14:45 UTCJul 25, 15:25 UTC40m
2026-07-25 HGB838 HKG → KWL Jul 25, 11:45 UTCJul 25, 12:00 UTC15m
2026-07-25 HGB337 OKA → HKG Jul 25, 05:00 UTCJul 25, 06:25 UTC1h 25m
2026-07-25 HGB336 - Jul 25, 00:30 UTCJul 25, 01:55 UTC1h 25m
2026-07-24 HGB2550 DAD → HKG Jul 24, 21:10 UTCJul 24, 21:25 UTC15m
2026-07-24 HGB2549 - Jul 24, 14:15 UTCJul 24, 14:30 UTC15m
2026-07-24 HGB321 NRT → HKG Jul 24, 08:45 UTCJul 24, 12:50 UTC4h 5m
2026-07-24 HGB320 HKG → NRT Jul 24, 03:05 UTCJul 24, 07:05 UTC4h 0m
2026-07-23 HGB323 NRT → HKG Jul 23, 09:55 UTCJul 23, 13:55 UTC4h 0m
2026-07-23 HGB322 HKG → NRT Jul 23, 04:15 UTCJul 23, 08:20 UTC4h 5m
2026-07-22 HGB383 FUK → HKG Jul 22, 23:35 UTCJul 23, 02:30 UTC2h 55m
2026-07-22 HGB382 HKG → CTS Jul 22, 18:55 UTCJul 22, 21:55 UTC3h 0m
2026-07-22 HGB336 HKG → HKG Jul 22, 02:05 UTCJul 22, 14:50 UTC12h 45m
2026-07-21 HGB321 NRT → HKG Jul 21, 08:35 UTCJul 21, 12:30 UTC3h 55m
2026-07-21 HGB320 HKG → NRT Jul 21, 02:55 UTCJul 21, 07:10 UTC4h 15m
2026-07-20 HGB323 NRT → HKG Jul 20, 10:15 UTCJul 20, 14:05 UTC3h 50m
2026-07-20 HGB322 HKG → NRT Jul 20, 04:40 UTCJul 20, 08:40 UTC4h 0m
2026-07-19 HGB383 FUK → HKG Jul 19, 23:45 UTCJul 20, 02:35 UTC2h 50m
2026-07-19 HGB382 HKG → CTS Jul 19, 19:05 UTCJul 19, 21:50 UTC2h 45m
2026-07-19 HGB705 TPE → HKG Jul 19, 13:30 UTCJul 19, 15:00 UTC1h 30m
2026-07-19 HGB704 HKG → TPE Jul 19, 10:50 UTCJul 19, 12:25 UTC1h 35m
2026-07-19 HGB309 FUK → HKG Jul 19, 05:35 UTCJul 19, 08:30 UTC2h 55m
2026-07-19 HGB308 HKG → FUK Jul 19, 01:00 UTCJul 19, 04:05 UTC3h 5m
2026-07-18 HGB711 TPE → HKG Jul 18, 19:50 UTCJul 18, 21:00 UTC1h 10m
2026-07-18 HGB710 HKG → TPE Jul 18, 15:30 UTCJul 18, 16:50 UTC1h 20m
2026-07-18 HGB321 - Jul 18, 08:10 UTCJul 18, 11:55 UTC3h 45m
2026-07-18 HGB320 HKG → NRT Jul 18, 02:14 UTCJul 18, 06:40 UTC4h 26m
2026-07-17 HGB8236 - Jul 17, 12:50 UTCJul 17, 16:24 UTC3h 35m
2026-07-17 HGB8235 HKG → ROR Jul 17, 07:20 UTCJul 17, 11:10 UTC3h 50m
2026-07-17 HGB703 - Jul 17, 04:10 UTCJul 17, 05:35 UTC1h 25m
2026-07-17 HGB702 HKG → TPE Jul 17, 01:25 UTCJul 17, 02:54 UTC1h 30m
2026-07-16 HGB282 - Jul 16, 21:05 UTCJul 16, 21:30 UTC25m
2026-07-16 HGB282 - Jul 16, 18:50 UTCJul 16, 19:10 UTC20m
2026-07-16 HGB281 HKG → BKK Jul 16, 16:15 UTCJul 16, 16:30 UTC15m
2026-07-16 HGB281 HKG → BKK Jul 16, 14:10 UTCJul 16, 14:25 UTC15m
2026-07-16 HGB321 NRT → HKG Jul 16, 08:15 UTCJul 16, 12:09 UTC3h 55m
2026-07-16 HGB320 HKG → NRT Jul 16, 02:15 UTCJul 16, 06:45 UTC4h 30m
2026-07-15 HGB323 NRT → HKG Jul 15, 09:50 UTCJul 15, 13:45 UTC3h 55m
2026-07-15 HGB322 HKG → NRT Jul 15, 03:50 UTCJul 15, 08:15 UTC4h 25m
2026-07-14 HB321 NRT → HKG Jul 14, 09:15 UTCJul 14, 13:10 UTC3h 55m
2026-07-14 HGB320 - Jul 14, 03:20 UTCJul 14, 07:30 UTC4h 10m
2026-07-13 HGB711 TPE → HKG Jul 13, 19:00 UTCJul 13, 20:20 UTC1h 20m
2026-07-13 HGB710 HKG → TPE Jul 13, 15:55 UTCJul 13, 17:30 UTC1h 35m
2026-07-13 HGB321 NRT → HKG Jul 13, 07:15 UTCJul 13, 11:05 UTC3h 50m
2026-07-13 HGB320 HKG → NRT Jul 13, 01:45 UTCJul 13, 05:50 UTC4h 5m
2026-07-12 HGB323 NRT → HKG Jul 12, 09:55 UTCJul 12, 13:40 UTC3h 45m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-KJA page for operator, model, and routing details .

Mode-S 789254 frequently asked

What is Mode-S code 789254?
789254 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-KJA.
Where is Mode-S 789254 registered?
Mode-S code 789254 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 789254 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 789254, octal 36111124, decimal 7,901,780.
What flights does 789254 operate?
Mode-S 789254 has broadcast 20 distinct callsigns, including HGB309, HGB323, HGB308, HGB322, HGB341.