Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78121E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8700 · AIRBUS A-320

Hex
78121E
Octal
36011036
Decimal
7,868,958
Country
CN
Tail
B-8700
Type
A320
No current signal · last broadcast 5d ago
Flights observed
46
Distinct callsigns
20
Country
CN
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 78121E.

Country allocation

The ICAO 24-bit address 78121E 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
CQH6826 - 3 2026-05-08
CQH8756 Spring Airlines 2 2026-04-17
CQH8755 Spring Airlines 2 2026-04-17
CQH8715 Spring Airlines 2 2026-04-18
CQH7431 Spring Airlines 2 2026-05-19
CQH7416 Spring Airlines 2 2026-05-09
CQH7282 Spring Airlines 2 2026-05-13
CQH6836 Spring Airlines 2 2026-05-07
CQH6825 - 2 2026-05-08
CQH6628 Spring Airlines 2 2026-05-28
CQH6627 Spring Airlines 2 2026-05-28
CQH6600 Spring Airlines 2 2026-05-06
CQH6471 Spring Airlines 2 2026-05-22
CQH8936 Spring Airlines 1 2026-05-25
CQH8934 Spring Airlines 1 2026-04-20
CQH8910 - 1 2026-04-24
CQH8876 Spring Airlines 1 2026-04-20
CQH8875 Spring Airlines 1 2026-04-19
CQH8838 - 1 2026-04-24
CQH8785 - 1 2026-05-14

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-05-28 CQH6628 CNX → XIY May 28, 15:25 UTCMay 28, 15:45 UTC20m
2026-05-28 CQH6627 XIY → CNX May 28, 13:35 UTCMay 28, 14:10 UTC35m
2026-05-26 CQH6538 FUK → PVG May 26, 09:09 UTCMay 26, 09:19 UTC10m
2026-05-25 CQH8936 CGQ → PVG May 25, 13:15 UTCMay 25, 14:00 UTC45m
2026-05-25 CQH7512 NGB → CAN May 25, 02:10 UTCMay 25, 02:20 UTC10m
2026-05-22 CQH6471 SJW → CGQ May 22, 00:55 UTCMay 22, 04:45 UTC3h 50m
2026-05-21 CQH6472 CGQ → SJW May 21, 14:30 UTCMay 21, 14:40 UTC10m
2026-05-21 CQH6471 SJW → CGQ May 21, 00:55 UTCMay 21, 05:00 UTC4h 5m
2026-05-19 CQH7432 DMK → NGB May 19, 07:10 UTCMay 19, 10:20 UTC3h 10m
2026-05-19 CQH7431 NGB → BKK May 19, 05:15 UTCMay 19, 05:35 UTC20m
2026-05-19 CQH7431 NGB → BKK May 19, 03:15 UTCMay 19, 03:35 UTC20m
2026-05-14 CQH8785 - May 14, 02:50 UTCMay 14, 11:40 UTC8h 50m
2026-05-13 CQH7282 BKK → PVG May 13, 12:00 UTCMay 14, 11:25 UTC23h 25m
2026-05-13 CQH7282 BKK → PVG May 13, 10:00 UTCMay 14, 03:00 UTC17h 0m
2026-05-13 CQH7281 PVG → BKK May 13, 06:10 UTCMay 13, 08:45 UTC2h 35m
2026-05-09 CQH7416 CSX → LHW May 9, 10:40 UTCMay 9, 10:55 UTC15m
2026-05-08 CQH7416 CSX → LHW May 8, 12:44 UTCMay 9, 10:55 UTC22h 10m
2026-05-08 CQH6826 - May 8, 10:39 UTCMay 8, 13:00 UTC2h 20m
2026-05-08 CQH6825 - May 8, 06:50 UTCMay 8, 09:14 UTC2h 25m
2026-05-07 CQH6836 ZUH → KHN May 7, 04:00 UTCMay 7, 04:10 UTC10m
2026-05-06 CQH6600 KHN → HRB May 6, 10:30 UTCMay 6, 14:55 UTC4h 25m
2026-05-03 CQH6628 CNX → XIY May 3, 14:35 UTCMay 3, 14:55 UTC20m
2026-05-03 CQH6627 XIY → CNX May 3, 12:35 UTCMay 3, 13:00 UTC25m
2026-05-03 CQH6836 ZUH → KHN May 3, 03:05 UTCMay 3, 03:20 UTC15m
2026-05-02 CQH6600 KHN → HRB May 2, 10:15 UTCMay 2, 14:35 UTC4h 20m
2026-05-01 CQH6826 - May 1, 12:50 UTCMay 2, 10:30 UTC21h 40m
2026-05-01 CQH6826 - May 1, 10:50 UTCMay 1, 13:05 UTC2h 15m
2026-05-01 CQH6825 - May 1, 06:50 UTCMay 1, 09:25 UTC2h 35m
2026-04-29 CQH7278 HLD → SJW Apr 29, 06:59 UTCApr 29, 07:10 UTC10m
2026-04-29 CQH7277 SHA → SJW Apr 29, 02:35 UTCApr 29, 02:50 UTC15m
2026-04-24 CQH8838 - Apr 24, 07:20 UTCApr 24, 07:45 UTC25m
2026-04-24 CQH8910 - Apr 24, 01:35 UTCApr 24, 01:55 UTC20m
2026-04-21 CQH6892 CAN → SHA Apr 21, 01:30 UTCApr 21, 01:40 UTC10m
2026-04-20 CQH8934 CNX → CAN Apr 20, 14:30 UTCApr 20, 14:55 UTC25m
2026-04-20 CQH8876 MFM → PVG Apr 20, 03:55 UTCApr 20, 13:15 UTC9h 20m
2026-04-19 CQH8875 PVG → MFM Apr 19, 11:40 UTCApr 20, 02:15 UTC14h 35m
2026-04-19 CQH6891 SHA → CAN Apr 19, 07:30 UTCApr 19, 07:45 UTC15m
2026-04-18 CQH7420 BKK → CAN Apr 18, 15:10 UTCApr 18, 15:20 UTC10m
2026-04-18 CQH7285 - Apr 18, 13:15 UTCApr 18, 13:35 UTC20m
2026-04-18 CQH8716 HKG → PVG Apr 18, 05:50 UTCApr 18, 11:20 UTC5h 30m
2026-04-18 CQH8715 PVG → HKG Apr 18, 03:45 UTCApr 18, 04:05 UTC20m
2026-04-18 CQH8715 PVG → HKG Apr 18, 02:40 UTCApr 18, 03:20 UTC40m
2026-04-17 CQH8756 BKK → PVG Apr 17, 22:00 UTCApr 17, 22:40 UTC40m
2026-04-17 CQH8756 BKK → PVG Apr 17, 20:05 UTCApr 17, 20:20 UTC15m
2026-04-17 CQH8755 PVG → BKK Apr 17, 18:10 UTCApr 17, 18:25 UTC15m
2026-04-17 CQH8755 PVG → BKK Apr 17, 16:05 UTCApr 17, 16:15 UTC10m

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-8700 page for operator, model, and routing details .

Mode-S 78121E frequently asked

What is Mode-S code 78121E?
78121E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8700.
Where is Mode-S 78121E registered?
Mode-S code 78121E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78121E broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78121E, octal 36011036, decimal 7,868,958.
What flights does 78121E operate?
Mode-S 78121E has broadcast 20 distinct callsigns, including CQH6826, CQH8756, CQH8755, CQH8715, CQH7431.