Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9125F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N684DA · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A9125F
Octal
52211137
Decimal
11,080,287
Country
US
Tail
N684DA
Type
B752
No current signal · last broadcast Jul 18, 18:15 UTC
Flights observed
431
Distinct callsigns
20
Country
US
Last broadcast
Jul 18, 18:15 UTC

Last known position

Most recent position reported by Mode-S A9125F.

Country allocation

The ICAO 24-bit address A9125F falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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
DAL894 Delta Air Lines 11 2026-06-06
DAL406 - 10 2026-07-15
DAL2345 - 10 2026-07-13
DAL1213 - 10 2026-07-09
DAL1588 - 8 2026-06-25
DAL1385 - 8 2026-06-24
DAL1332 Delta Air Lines 8 2026-04-19
DAL774 Delta Air Lines 7 2026-05-26
DAL2440 Delta Air Lines 7 2026-05-28
DAL1946 Delta Air Lines 7 2026-04-24
DAL1785 - 7 2026-06-26
DAL1261 - 7 2026-06-25
DAL588 - 6 2026-07-10
DAL587 - 6 2026-07-10
DAL542 Delta Air Lines 6 2026-05-26
DAL2326 - 6 2026-07-18
DAL1860 Delta Air Lines 6 2026-06-04
DAL1611 - 6 2026-07-18
DAL1462 Delta Air Lines 6 2026-04-28
DAL1249 Delta Air Lines 6 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 DAL9941 ATL → CWF Jul 18, 17:13 UTCJul 18, 18:07 UTC54m
2026-07-18 DAL9941 ATL → CWF Jul 18, 17:15 UTCJul 18, 18:15 UTC1h 0m
2026-07-18 DAL2326 - Jul 18, 15:00 UTCJul 18, 15:40 UTC40m
2026-07-18 DAL2326 JAX → ATL Jul 18, 14:59 UTCJul 18, 15:40 UTC41m
2026-07-18 DAL2326 - Jul 18, 13:10 UTCJul 18, 13:50 UTC40m
2026-07-18 DAL1611 - Jul 18, 10:30 UTCJul 18, 11:50 UTC1h 20m
2026-07-18 DAL651 ATL → DTW Jul 18, 06:30 UTCJul 18, 07:55 UTC1h 25m
2026-07-18 DAL651 ATL → DTW Jul 18, 06:27 UTCJul 18, 07:52 UTC1h 25m
2026-07-17 DAL591 LAS → ATL Jul 17, 22:15 UTCJul 18, 01:50 UTC3h 35m
2026-07-17 DAL421 - Jul 17, 16:55 UTCJul 17, 20:25 UTC3h 30m
2026-07-17 DAL1298 ATL → DTW Jul 17, 13:50 UTCJul 17, 15:20 UTC1h 30m
2026-07-17 DAL2286 JFK → ATL Jul 17, 10:15 UTCJul 17, 11:55 UTC1h 40m
2026-07-17 DAL8891 LAX → PHL Jul 17, 00:45 UTCJul 17, 01:20 UTC35m
2026-07-16 DAL8891 LAX → PHL Jul 16, 18:29 UTCJul 16, 23:15 UTC4h 45m
2026-07-16 DAL8891 - Jul 16, 13:30 UTCJul 16, 14:55 UTC1h 25m
2026-07-16 DAL8891 SLC → LAX Jul 16, 13:30 UTCJul 16, 14:58 UTC1h 28m
2026-07-16 DAL8771 ATL → SLC Jul 16, 01:35 UTCJul 16, 04:55 UTC3h 20m
2026-07-15 DAL406 ATL → ATL Jul 15, 15:25 UTCJul 15, 23:45 UTC8h 20m
2026-07-15 DAL1463 MCO → ATL Jul 15, 12:20 UTCJul 15, 13:25 UTC1h 5m
2026-07-14 DAL2881 ATL → MCO Jul 14, 23:21 UTCJul 15, 00:29 UTC1h 8m
2026-07-14 DAL2881 ATL → MCO Jul 14, 23:25 UTCJul 15, 00:35 UTC1h 10m
2026-07-14 DAL317 - Jul 14, 18:20 UTCJul 14, 19:55 UTC1h 35m
2026-07-13 DAL315 - Jul 13, 23:50 UTCJul 14, 17:05 UTC17h 15m
2026-07-13 DAL1525 TPA → ATL Jul 13, 19:55 UTCJul 13, 21:20 UTC1h 25m
2026-07-13 DAL1525 ATL → TPA Jul 13, 17:00 UTCJul 13, 18:15 UTC1h 15m
2026-07-13 DAL1338 ORF → ATL Jul 13, 12:15 UTCJul 13, 13:35 UTC1h 20m
2026-07-13 DAL2338 ATL → ORF Jul 13, 03:20 UTCJul 13, 04:30 UTC1h 10m
2026-07-13 DAL2345 - Jul 13, 00:05 UTCJul 13, 01:40 UTC1h 35m
2026-07-13 DAL2345 FLL → ATL Jul 13, 00:01 UTCJul 13, 01:42 UTC1h 41m
2026-07-12 DAL2345 ATL → FLL Jul 12, 20:45 UTCJul 12, 22:15 UTC1h 30m
2026-07-12 DAL901 PHX → ATL Jul 12, 14:25 UTCJul 12, 17:45 UTC3h 20m
2026-07-11 DAL1135 - Jul 11, 21:40 UTCJul 12, 01:10 UTC3h 30m
2026-07-11 DAL1031 - Jul 11, 18:25 UTCJul 11, 20:05 UTC1h 40m
2026-07-10 DAL587 - Jul 10, 21:05 UTCJul 11, 00:25 UTC3h 20m
2026-07-10 DAL587 MEX → ATL Jul 10, 21:05 UTCJul 11, 00:24 UTC3h 19m
2026-07-10 DAL588 ATL → MEX Jul 10, 16:15 UTCJul 10, 19:25 UTC3h 10m
2026-07-10 DAL588 ATL → MEX Jul 10, 16:14 UTCJul 10, 19:23 UTC3h 9m
2026-07-10 DAL1548 MCO → ATL Jul 10, 09:40 UTCJul 10, 10:40 UTC1h 0m
2026-07-10 DAL2881 ATL → MCO Jul 10, 00:45 UTCJul 10, 01:55 UTC1h 10m
2026-07-09 DAL1642 MCO → ATL Jul 9, 21:45 UTCJul 9, 22:55 UTC1h 10m
2026-07-09 DAL1642 ATL → MCO Jul 9, 18:10 UTCJul 9, 19:10 UTC1h 0m
2026-07-09 DAL1213 MCO → ATL Jul 9, 15:15 UTCJul 9, 16:15 UTC1h 0m
2026-07-09 DAL1213 MCO → ATL Jul 9, 15:13 UTCJul 9, 16:10 UTC57m
2026-07-09 DAL1213 ATL → MCO Jul 9, 12:40 UTCJul 9, 13:40 UTC1h 0m
2026-07-09 DAL1168 PPM → ATL Jul 9, 09:40 UTCJul 9, 11:00 UTC1h 20m
2026-07-09 DAL1229 ATL → FLL Jul 9, 02:50 UTCJul 9, 04:15 UTC1h 25m
2026-07-08 DAL9969 - Jul 8, 23:15 UTCJul 9, 00:40 UTC1h 25m
2026-07-08 DAL1005 ATL → DTW Jul 8, 20:25 UTCJul 8, 21:45 UTC1h 20m
2026-07-08 DAL1005 ATL → DTW Jul 8, 20:25 UTCJul 8, 21:46 UTC1h 21m
2026-07-08 DAL2188 - Jul 8, 17:30 UTCJul 8, 18:55 UTC1h 25m

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 N684DA page for operator, model, and routing details .

Mode-S A9125F frequently asked

What is Mode-S code A9125F?
A9125F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N684DA.
Where is Mode-S A9125F registered?
Mode-S code A9125F is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A9125F broadcasting right now?
No active broadcast right now. Last signal was Jul 18, 18:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9125F, octal 52211137, decimal 11,080,287.
What flights does A9125F operate?
Mode-S A9125F has broadcast 20 distinct callsigns, including DAL894, DAL406, DAL2345, DAL1213, DAL1588.