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
- Flights observed
- 98
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- 2h ago
Last known position
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 | - | 18 | 2026-05-27 |
| HGO447 | - | 17 | 2026-05-29 |
| HGO446 | - | 13 | 2026-05-28 |
| HGO442 | - | 10 | 2026-05-26 |
| HGO879 | - | 5 | 2026-05-21 |
| HGO774 | - | 5 | 2026-05-29 |
| HGO775 | One Air | 4 | 2026-05-23 |
| HGO772 | One Air | 4 | 2026-05-14 |
| HGO771 | - | 3 | 2026-04-22 |
| HGO880 | - | 2 | 2026-05-22 |
| HGO211 | One Air | 2 | 2026-05-09 |
| HGO880P | - | 1 | 2026-04-16 |
| HGO879P | - | 1 | 2026-04-14 |
| HGO878P | - | 1 | 2026-05-20 |
| HGO878 | One Air | 1 | 2026-05-21 |
| HGO846 | - | 1 | 2026-05-17 |
| HGO845 | - | 1 | 2026-05-16 |
| HGO844 | - | 1 | 2026-05-16 |
| HGO833 | - | 1 | 2026-04-21 |
| HGO832 | - | 1 | 2026-04-20 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | HGO774 | - | May 29, 20:00 UTC | May 29, 23:05 UTC | 3h 5m |
| 2026-05-29 | HGO447 | - | May 29, 09:20 UTC | May 29, 14:25 UTC | 5h 5m |
| 2026-05-28 | HGO447 | - | May 28, 11:50 UTC | May 29, 11:45 UTC | 23h 55m |
| 2026-05-28 | HGO446 | - | May 28, 09:50 UTC | May 29, 09:45 UTC | 23h 55m |
| 2026-05-28 | HGO446 | - | May 28, 08:50 UTC | May 28, 11:55 UTC | 3h 5m |
| 2026-05-27 | HGO443 | - | May 27, 22:45 UTC | May 28, 04:25 UTC | 5h 40m |
| 2026-05-27 | HGO443 | - | May 27, 04:34 UTC | May 28, 03:45 UTC | 23h 10m |
| 2026-05-27 | HGO443 | - | May 27, 01:49 UTC | May 28, 01:45 UTC | 23h 56m |
| 2026-05-26 | HGO442 | - | May 26, 23:49 UTC | May 27, 23:45 UTC | 23h 56m |
| 2026-05-26 | HGO442 | - | May 26, 21:20 UTC | May 27, 04:45 UTC | 7h 25m |
| 2026-05-25 | HGO443 | - | May 25, 19:54 UTC | May 26, 17:20 UTC | 21h 25m |
| 2026-05-25 | HGO443 | - | May 25, 16:10 UTC | May 26, 15:45 UTC | 23h 35m |
| 2026-05-25 | HGO442 | - | May 25, 13:50 UTC | May 26, 13:34 UTC | 23h 44m |
| 2026-05-25 | HGO442 | - | May 25, 12:20 UTC | May 25, 19:54 UTC | 7h 34m |
| 2026-05-23 | HGO775 | DWC → EMA | May 23, 21:45 UTC | May 24, 02:30 UTC | 4h 45m |
| 2026-05-23 | HGO775 | DWC → EMA | May 23, 11:30 UTC | May 23, 11:40 UTC | 10m |
| 2026-05-23 | HGO703 | - | May 23, 07:15 UTC | May 23, 07:55 UTC | 40m |
| 2026-05-22 | HGO702 | - | May 22, 14:25 UTC | May 23, 05:00 UTC | 14h 34m |
| 2026-05-22 | HGO701 | - | May 22, 10:45 UTC | May 22, 11:40 UTC | 55m |
| 2026-05-22 | HGO880 | - | May 22, 01:15 UTC | May 22, 08:05 UTC | 6h 50m |
| 2026-05-21 | HGO879 | - | May 21, 12:00 UTC | May 21, 17:05 UTC | 5h 5m |
| 2026-05-21 | HGO878 | LGG → HKG | May 21, 08:10 UTC | May 21, 09:45 UTC | 1h 35m |
| 2026-05-20 | HGO878P | - | May 20, 16:10 UTC | May 20, 17:05 UTC | 55m |
| 2026-05-19 | HGO447 | - | May 19, 12:30 UTC | May 19, 13:40 UTC | 1h 10m |
| 2026-05-18 | HGO447 | - | May 18, 15:50 UTC | May 19, 13:40 UTC | 21h 49m |
| 2026-05-18 | HGO446 | - | May 18, 13:50 UTC | May 19, 13:40 UTC | 23h 49m |
| 2026-05-18 | HGO446 | - | May 18, 11:25 UTC | May 18, 16:00 UTC | 4h 35m |
| 2026-05-18 | HGO443 | - | May 18, 02:05 UTC | May 18, 08:20 UTC | 6h 15m |
| 2026-05-17 | HGO443 | - | May 17, 10:30 UTC | May 18, 08:20 UTC | 21h 50m |
| 2026-05-17 | HGO443 | - | May 17, 08:30 UTC | May 18, 07:45 UTC | 23h 15m |
| 2026-05-17 | HGO846 | - | May 17, 05:30 UTC | May 18, 03:45 UTC | 22h 15m |
| 2026-05-16 | HGO845 | - | May 16, 20:30 UTC | May 16, 23:35 UTC | 3h 5m |
| 2026-05-16 | HGO844 | - | May 16, 16:15 UTC | May 16, 17:10 UTC | 55m |
| 2026-05-14 | HGO772 | PAE → EMA | May 14, 19:30 UTC | May 15, 00:25 UTC | 4h 55m |
| 2026-05-14 | HGO772 | PAE → EMA | May 14, 08:20 UTC | May 14, 08:35 UTC | 15m |
| 2026-05-09 | HGO211 | EMA → HKG | May 9, 20:05 UTC | May 9, 20:25 UTC | 20m |
| 2026-05-09 | HGO211 | EMA → HKG | May 9, 08:20 UTC | May 9, 12:55 UTC | 4h 35m |
| 2026-05-08 | HGO447 | - | May 8, 23:05 UTC | May 9, 03:55 UTC | 4h 50m |
| 2026-05-07 | HGO447 | - | May 7, 23:49 UTC | May 8, 23:45 UTC | 23h 55m |
| 2026-05-07 | HGO446 | - | May 7, 19:30 UTC | May 8, 00:14 UTC | 4h 45m |
| 2026-05-06 | HGO443 | - | May 6, 22:30 UTC | May 7, 03:30 UTC | 5h 0m |
| 2026-05-05 | HGO443 | - | May 5, 23:50 UTC | May 6, 23:45 UTC | 23h 54m |
| 2026-05-05 | HGO442 | - | May 5, 19:25 UTC | May 6, 00:05 UTC | 4h 40m |
| 2026-05-05 | HGO447 | - | May 5, 10:45 UTC | May 5, 15:45 UTC | 5h 0m |
| 2026-05-04 | HGO447 | - | May 4, 16:35 UTC | May 5, 15:45 UTC | 23h 11m |
| 2026-05-04 | HGO447 | - | May 4, 13:50 UTC | May 5, 13:45 UTC | 23h 56m |
| 2026-05-04 | HGO446 | - | May 4, 11:50 UTC | May 5, 11:45 UTC | 23h 56m |
| 2026-05-04 | HGO446 | - | May 4, 09:00 UTC | May 4, 16:40 UTC | 7h 40m |
| 2026-05-03 | HGO443 | - | May 3, 23:35 UTC | May 4, 00:45 UTC | 1h 10m |
| 2026-05-03 | HGO443 | - | May 3, 01:50 UTC | May 4, 00:45 UTC | 22h 54m |
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 .