Apparatus

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sensors Mode-S transponder

4071C7

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CLBA · BOEING 747-400

Hex
4071C7
Octal
20070707
Decimal
4,223,431
Country
GB
Tail
G-CLBA
Type
B744
No current signal · last broadcast 14h ago
Flights observed
176
Distinct callsigns
20
Country
GB
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 4071C7.

Country allocation

The ICAO 24-bit address 4071C7 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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
HGO443 - 24 2026-07-12
HGO447 - 22 2026-07-10
HGO446 - 17 2026-07-13
HGO442 - 16 2026-07-11
HGO772 One Air 10 2026-07-01
HGO775 One Air 8 2026-06-13
HGO879 - 7 2026-06-24
HGO880 - 5 2026-07-01
HGO774 - 5 2026-05-29
HGO714 - 4 2026-06-25
HGO211 One Air 4 2026-06-05
HGO813 - 3 2026-06-08
HGO771 - 3 2026-04-22
HGO716 - 3 2026-06-26
HGO703 - 3 2026-06-11
HGO996 - 2 2026-06-18
HGO995 - 2 2026-06-30
HGO992 - 2 2026-06-30
HGO990 - 2 2026-06-29
HGO878P - 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 HGO446 - Jul 13, 08:40 UTCJul 13, 11:50 UTC3h 10m
2026-07-12 HGO443 - Jul 12, 23:45 UTCJul 13, 04:50 UTC5h 5m
2026-07-11 HGO442 - Jul 11, 08:10 UTCJul 11, 12:35 UTC4h 25m
2026-07-10 HGO447 - Jul 10, 13:15 UTCJul 10, 13:45 UTC30m
2026-07-10 HGO447 - Jul 10, 08:20 UTCJul 10, 09:40 UTC1h 20m
2026-07-09 HGO447 - Jul 9, 09:50 UTCJul 10, 09:40 UTC23h 50m
2026-07-09 HGO446 - Jul 9, 07:20 UTCJul 9, 11:45 UTC4h 25m
2026-07-08 HGO443 - Jul 8, 20:25 UTCJul 8, 21:40 UTC1h 15m
2026-07-07 HGO881 - Jul 7, 21:25 UTCJul 7, 21:40 UTC15m
2026-07-01 HGO880 - Jul 1, 21:20 UTCJul 2, 00:35 UTC3h 15m
2026-07-01 HGO772 PAE → EMA Jul 1, 10:50 UTCJul 1, 12:00 UTC1h 10m
2026-06-30 HGO772 PAE → EMA Jun 30, 23:45 UTCJul 1, 00:00 UTC15m
2026-06-30 HGO995 - Jun 30, 20:10 UTCJun 30, 20:30 UTC20m
2026-06-30 HGO995 - Jun 30, 13:10 UTCJun 30, 19:25 UTC6h 15m
2026-06-30 HGO992 - Jun 30, 02:45 UTCJun 30, 08:45 UTC6h 0m
2026-06-30 HGO992 - Jun 30, 01:50 UTCJun 30, 02:00 UTC10m
2026-06-29 HGO990 - Jun 29, 22:39 UTCJun 29, 22:59 UTC20m
2026-06-29 HGO990 - Jun 29, 15:30 UTCJun 29, 21:54 UTC6h 25m
2026-06-29 HGO721 - Jun 29, 03:14 UTCJun 29, 09:20 UTC6h 5m
2026-06-29 HGO721 - Jun 29, 02:20 UTCJun 29, 02:30 UTC10m
2026-06-28 HGO720 - Jun 28, 13:45 UTCJun 28, 21:10 UTC7h 25m
2026-06-26 HGO719 - Jun 26, 14:29 UTCJun 26, 20:44 UTC6h 15m
2026-06-26 HGO719 - Jun 26, 13:49 UTCJun 26, 13:55 UTC5m
2026-06-26 HGO716 - Jun 26, 08:34 UTCJun 26, 09:10 UTC35m
2026-06-26 HGO716 - Jun 26, 01:29 UTCJun 26, 07:50 UTC6h 20m
2026-06-25 HGO715 - Jun 25, 14:20 UTCJun 25, 20:49 UTC6h 30m
2026-06-25 HGO714 - Jun 25, 08:34 UTCJun 25, 09:29 UTC55m
2026-06-24 HGO880 - Jun 24, 07:05 UTCJun 24, 11:24 UTC4h 20m
2026-06-24 HGO880 - Jun 24, 05:05 UTCJun 24, 05:20 UTC15m
2026-06-24 HGO879 - Jun 24, 00:09 UTCJun 24, 00:30 UTC20m
2026-06-23 HGO879 - Jun 23, 16:54 UTCJun 23, 21:45 UTC4h 50m
2026-06-23 HGO878 - Jun 23, 12:35 UTCJun 23, 14:04 UTC1h 30m
2026-06-23 HGO878P - Jun 23, 07:29 UTCJun 23, 08:30 UTC1h 0m
2026-06-21 HGO443 - Jun 21, 22:29 UTCJun 22, 03:35 UTC5h 5m
2026-06-20 HGO442 - Jun 20, 20:09 UTCJun 21, 03:25 UTC7h 15m
2026-06-20 HGO772 PAE → EMA Jun 20, 11:09 UTCJun 20, 16:19 UTC5h 10m
2026-06-19 HGO772 PAE → EMA Jun 19, 23:14 UTCJun 19, 23:34 UTC20m
2026-06-19 HGO708 MST → HKG Jun 19, 07:34 UTCJun 19, 18:59 UTC11h 25m
2026-06-18 HGO716 - Jun 18, 19:15 UTCJun 19, 04:34 UTC9h 19m
2026-06-18 HGO714 - Jun 18, 15:00 UTCJun 18, 15:10 UTC10m
2026-06-18 HGO714 - Jun 18, 08:40 UTCJun 18, 13:40 UTC5h 0m
2026-06-18 HGO714 - Jun 18, 08:00 UTCJun 18, 08:10 UTC10m
2026-06-18 HGO996 - Jun 18, 02:10 UTCJun 18, 02:40 UTC30m
2026-06-17 HGO996 - Jun 17, 07:50 UTCJun 18, 01:25 UTC17h 35m
2026-06-14 HGO713 - Jun 14, 09:15 UTCJun 14, 10:00 UTC45m
2026-06-13 HGO713 - Jun 13, 21:50 UTCJun 14, 00:50 UTC3h 0m
2026-06-13 HGO775 DWC → EMA Jun 13, 13:15 UTCJun 13, 18:40 UTC5h 25m
2026-06-13 HGO775 DWC → EMA Jun 13, 00:35 UTCJun 13, 00:50 UTC15m
2026-06-12 HGO705 - Jun 12, 21:10 UTCJun 12, 21:45 UTC35m
2026-06-12 HGO704 - Jun 12, 01:10 UTCJun 12, 19:00 UTC17h 50m

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 G-CLBA page for operator, model, and routing details .

Mode-S 4071C7 frequently asked

What is Mode-S code 4071C7?
4071C7 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CLBA.
Where is Mode-S 4071C7 registered?
Mode-S code 4071C7 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4071C7 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4071C7, octal 20070707, decimal 4,223,431.
What flights does 4071C7 operate?
Mode-S 4071C7 has broadcast 20 distinct callsigns, including HGO443, HGO447, HGO446, HGO442, HGO772.