sensors Mode-S transponder

407930

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TTNM · AIRBUS A-320neo

Hex
407930
Octal
20074460
Decimal
4,225,328
Country
GB
Tail
G-TTNM
Type
A20N
No current signal · last broadcast 12h ago
Flights observed
5
Distinct callsigns
3
Country
GB
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 407930.

Country allocation

The ICAO 24-bit address 407930 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 3 distinct

Callsign Airline Flights Last seen
BAW995 - 2 2026-04-13
BAW994 - 2 2026-04-13
BAW628 British Airways 1 2026-04-14

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-14 BAW628 LHR → JMK Apr 14, 10:05 UTCApr 14, 11:05 UTC1h 0m
2026-04-13 BAW995 - Apr 13, 19:50 UTCApr 13, 20:05 UTC15m
2026-04-13 BAW995 - Apr 13, 18:40 UTCApr 13, 20:05 UTC1h 25m
2026-04-13 BAW994 - Apr 13, 16:15 UTCApr 13, 17:25 UTC1h 10m
2026-04-13 BAW994 - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m

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

Mode-S 407930 frequently asked

What is Mode-S code 407930?
407930 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TTNM.
Where is Mode-S 407930 registered?
Mode-S code 407930 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 407930 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407930, octal 20074460, decimal 4,225,328.
What flights does 407930 operate?
Mode-S 407930 has broadcast 3 distinct callsigns, including BAW995, BAW994, BAW628.