Apparatus

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sensors Mode-S transponder

A091D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N136DQ · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A091D5
Octal
50110725
Decimal
10,523,093
Country
US
Tail
N136DQ
Type
BCS1
Broadcasting now · callsign DAL2666 · 39,000 ft
Flights observed
508
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

A091D5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A091D5 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
DAL2245 Delta Air Lines 17 2026-05-21
DAL1277 - 13 2026-06-20
DAL1553 Delta Air Lines 12 2026-06-08
DAL1254 - 12 2026-07-15
DAL1623 Delta Air Lines 11 2026-07-24
DAL1503 - 11 2026-07-03
DAL1744 Delta Air Lines 10 2026-06-04
DAL1198 Delta Air Lines 10 2026-07-25
DAL2327 Delta Air Lines 9 2026-05-23
DAL2811 Delta Air Lines 8 2026-05-31
DAL1024 Delta Air Lines 8 2026-07-24
DAL2680 Delta Air Lines 7 2026-06-09
DAL2502 Delta Air Lines 7 2026-07-17
DAL2455 Delta Air Lines 7 2026-07-26
DAL1304 - 7 2026-06-16
DAL1185 Delta Air Lines 7 2026-06-16
DAL2798 - 6 2026-07-02
DAL2795 - 6 2026-07-02
DAL2619 - 6 2026-07-15
DAL2181 - 6 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2455 PHL → DTW Jul 26, 19:45 UTCJul 26, 21:15 UTC1h 30m
2026-07-26 DAL2455 PHL → DTW Jul 26, 16:10 UTCJul 26, 18:35 UTC2h 25m
2026-07-26 DAL1586 DTW → AUS Jul 26, 11:45 UTCJul 26, 12:50 UTC1h 5m
2026-07-26 DAL1586 DTW → AUS Jul 26, 01:15 UTCJul 26, 02:10 UTC55m
2026-07-25 DAL2920 MCO → BOS Jul 25, 23:20 UTCJul 26, 00:15 UTC55m
2026-07-25 DAL2920 MCO → BOS Jul 25, 21:15 UTCJul 25, 22:00 UTC45m
2026-07-25 DAL1198 ATL → MCO Jul 25, 17:05 UTCJul 25, 18:30 UTC1h 25m
2026-07-25 DAL1198 ATL → MCO Jul 25, 14:20 UTCJul 25, 15:45 UTC1h 25m
2026-07-25 DAL2544 SLC → OAK Jul 25, 11:45 UTCJul 25, 12:50 UTC1h 5m
2026-07-25 DAL2544 SLC → OAK Jul 25, 11:42 UTCJul 25, 12:45 UTC1h 3m
2026-07-25 DAL1586 DTW → AUS Jul 25, 01:00 UTCJul 25, 02:05 UTC1h 5m
2026-07-25 DAL1586 DTW → AUS Jul 25, 00:55 UTCJul 25, 01:54 UTC59m
2026-07-24 DAL1623 ATL → SJC Jul 24, 22:40 UTCJul 24, 23:45 UTC1h 5m
2026-07-24 DAL1623 ATL → SJC Jul 24, 19:35 UTCJul 24, 20:40 UTC1h 5m
2026-07-24 DAL1367 ORD → ATL Jul 24, 17:00 UTCJul 24, 18:15 UTC1h 15m
2026-07-24 DAL1367 ORD → ATL Jul 24, 14:40 UTCJul 24, 16:00 UTC1h 20m
2026-07-24 DAL1024 ATL → CHA Jul 24, 02:10 UTCJul 24, 03:30 UTC1h 20m
2026-07-23 DAL1024 ATL → CHA Jul 23, 23:35 UTCJul 24, 00:55 UTC1h 20m
2026-07-22 DAL1623 ATL → SJC Jul 22, 23:20 UTCJul 23, 00:40 UTC1h 20m
2026-07-22 DAL1623 ATL → SJC Jul 22, 23:19 UTCJul 23, 00:35 UTC1h 16m
2026-07-22 DAL1623 ATL → SJC Jul 22, 19:35 UTCJul 22, 21:05 UTC1h 30m
2026-07-20 DAL1623 ATL → SJC Jul 20, 23:10 UTCJul 21, 00:30 UTC1h 20m
2026-07-20 DAL1623 ATL → SJC Jul 20, 20:50 UTCJul 20, 22:05 UTC1h 15m
2026-07-20 DAL1367 ORD → ATL Jul 20, 17:25 UTCJul 20, 18:45 UTC1h 20m
2026-07-20 DAL1367 ORD → ATL Jul 20, 14:20 UTCJul 20, 15:40 UTC1h 20m
2026-07-20 DAL2544 - Jul 20, 11:45 UTCJul 20, 12:50 UTC1h 5m
2026-07-19 DAL1623 ATL → SJC Jul 19, 19:30 UTCJul 19, 20:30 UTC1h 0m
2026-07-19 DAL1302 - Jul 19, 16:45 UTCJul 19, 18:10 UTC1h 25m
2026-07-19 DAL1302 - Jul 19, 14:05 UTCJul 19, 15:25 UTC1h 20m
2026-07-19 DAL2335 - Jul 19, 12:15 UTCJul 19, 12:40 UTC25m
2026-07-19 DAL2608 MSP → PHL Jul 19, 03:40 UTCJul 19, 04:00 UTC20m
2026-07-18 DAL2708 - Jul 18, 16:25 UTCJul 18, 17:45 UTC1h 20m
2026-07-18 DAL1614 LGA → MIA Jul 18, 14:15 UTCJul 18, 15:30 UTC1h 15m
2026-07-18 DAL1024 ATL → CHA Jul 18, 02:19 UTCJul 18, 03:35 UTC1h 16m
2026-07-18 DAL1024 ATL → CHA Jul 18, 00:10 UTCJul 18, 01:25 UTC1h 15m
2026-07-17 DAL1532 - Jul 17, 20:04 UTCJul 17, 22:35 UTC2h 30m
2026-07-17 DAL2502 ATL → BNA Jul 17, 16:00 UTCJul 17, 18:40 UTC2h 40m
2026-07-17 DAL2544 DEN → SLC Jul 17, 12:00 UTCJul 17, 13:05 UTC1h 5m
2026-07-17 DAL1586 SLC → DEN Jul 17, 00:50 UTCJul 17, 01:49 UTC1h 0m
2026-07-16 DAL1623 - Jul 16, 22:19 UTCJul 16, 23:15 UTC55m
2026-07-16 DAL1623 DEN → SLC Jul 16, 22:19 UTCJul 16, 23:31 UTC1h 12m
2026-07-16 DAL1623 SLC → DEN Jul 16, 19:30 UTCJul 16, 20:35 UTC1h 5m
2026-07-16 DAL2716 - Jul 16, 12:09 UTCJul 16, 15:00 UTC2h 50m
2026-07-15 DAL2619 - Jul 15, 23:55 UTCJul 16, 02:35 UTC2h 40m
2026-07-15 DAL1254 SJC → SLC Jul 15, 20:40 UTCJul 15, 22:15 UTC1h 35m
2026-07-15 DAL1254 SLC → SJC Jul 15, 17:50 UTCJul 15, 19:20 UTC1h 30m
2026-07-15 DAL1254 SJC → SLC Jul 15, 17:47 UTCJul 15, 19:14 UTC1h 27m
2026-07-15 DAL2363 - Jul 15, 13:15 UTCJul 15, 15:40 UTC2h 25m
2026-07-15 DAL1609 - Jul 15, 03:05 UTCJul 15, 04:10 UTC1h 5m
2026-07-14 DAL1449 - Jul 14, 23:25 UTCJul 15, 00:55 UTC1h 30m

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 N136DQ page for operator, model, and routing details .

Mode-S A091D5 frequently asked

What is Mode-S code A091D5?
A091D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N136DQ.
Where is Mode-S A091D5 registered?
Mode-S code A091D5 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 A091D5 broadcasting right now?
Yes. Mode-S A091D5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A091D5, octal 50110725, decimal 10,523,093.
What flights does A091D5 operate?
Mode-S A091D5 has broadcast 20 distinct callsigns, including DAL2245, DAL1277, DAL1553, DAL1254, DAL1623.