sensors Mode-S transponder

A70AED

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N553DT · operated by DELTA AIR LINES INC

Hex
A70AED
Octal
51605355
Decimal
10,947,309
Country
US
Tail
N553DT
No current signal · last broadcast 22d ago
Flights observed
147
Distinct callsigns
14
Country
US
Last broadcast
22d ago

Last known position

Most recent position reported by Mode-S A70AED.

Country allocation

The ICAO 24-bit address A70AED 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 14 distinct

Callsign Airline Flights Last seen
DAL725 Delta Air Lines 31 2026-07-24
DAL693 Delta Air Lines 30 2026-07-21
DAL827 Delta Air Lines 17 2026-07-22
DAL446 Delta Air Lines 14 2026-07-22
DAL495 - 11 2026-07-10
DAL331 - 9 2026-07-13
DAL898 - 7 2026-07-11
DAL320 - 7 2026-07-13
DAL528 - 6 2026-07-11
DAL774 - 4 2026-07-10
DAL542 - 4 2026-07-10
DAL409 Delta Air Lines 3 2026-07-21
DAL9936 Delta Air Lines 2 2026-05-06
DAL834 Delta Air Lines 2 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 DAL725 DFW → LGA Jul 24, 17:50 UTCJul 24, 22:00 UTC4h 10m
2026-07-24 DAL725 DFW → LGA Jul 24, 12:30 UTCJul 24, 16:15 UTC3h 45m
2026-07-22 DAL446 BOS → LAX Jul 22, 19:20 UTCJul 22, 23:10 UTC3h 50m
2026-07-22 DAL827 DEN → CVG Jul 22, 13:50 UTCJul 22, 17:55 UTC4h 5m
2026-07-21 DAL693 SEA → HNL Jul 21, 19:05 UTCJul 21, 23:20 UTC4h 15m
2026-07-21 DAL693 SEA → HNL Jul 21, 12:35 UTCJul 21, 16:50 UTC4h 15m
2026-07-21 DAL409 ATL → LGA Jul 21, 06:15 UTCJul 21, 09:15 UTC3h 0m
2026-07-21 DAL409 ATL → LGA Jul 21, 06:11 UTCJul 21, 10:22 UTC4h 11m
2026-07-20 DAL834 BDL → ATL Jul 20, 23:45 UTCJul 21, 04:25 UTC4h 40m
2026-07-20 DAL725 DFW → LGA Jul 20, 18:10 UTCJul 20, 22:15 UTC4h 5m
2026-07-20 DAL725 ATL → SAN Jul 20, 12:50 UTCJul 20, 16:30 UTC3h 40m
2026-07-19 DAL446 BOS → LAX Jul 19, 19:10 UTCJul 19, 23:20 UTC4h 10m
2026-07-19 DAL827 DEN → CVG Jul 19, 13:55 UTCJul 19, 17:40 UTC3h 45m
2026-07-18 DAL693 - Jul 18, 18:40 UTCJul 18, 23:45 UTC5h 5m
2026-07-18 DAL693 ATL → SFO Jul 18, 12:15 UTCJul 18, 16:35 UTC4h 20m
2026-07-18 DAL409 SEA → ATL Jul 18, 06:20 UTCJul 18, 10:40 UTC4h 20m
2026-07-17 DAL834 ATL → SEA Jul 17, 23:39 UTCJul 18, 04:15 UTC4h 36m
2026-07-17 DAL725 - Jul 17, 18:10 UTCJul 17, 22:10 UTC4h 0m
2026-07-17 DAL725 ATL → SAN Jul 17, 12:15 UTCJul 17, 16:04 UTC3h 50m
2026-07-17 DAL725 ATL → SAN Jul 17, 12:11 UTCJul 17, 15:59 UTC3h 48m
2026-07-16 DAL446 LAX → ATL Jul 16, 19:10 UTCJul 16, 23:20 UTC4h 10m
2026-07-16 DAL827 - Jul 16, 13:30 UTCJul 16, 17:14 UTC3h 45m
2026-07-16 DAL827 ATL → LAX Jul 16, 13:30 UTCJul 16, 17:23 UTC3h 53m
2026-07-15 DAL693 SFO → ATL Jul 15, 19:10 UTCJul 15, 23:35 UTC4h 25m
2026-07-15 DAL693 ATL → SFO Jul 15, 12:35 UTCJul 15, 16:55 UTC4h 20m
2026-07-14 DAL725 - Jul 14, 17:50 UTCJul 14, 22:00 UTC4h 10m
2026-07-14 DAL725 ATL → SAN Jul 14, 12:30 UTCJul 14, 16:15 UTC3h 45m
2026-07-13 DAL446 - Jul 13, 19:10 UTCJul 13, 23:35 UTC4h 25m
2026-07-13 DAL827 - Jul 13, 13:55 UTCJul 13, 17:45 UTC3h 50m
2026-07-13 DAL320 LAX → ATL Jul 13, 08:20 UTCJul 13, 12:15 UTC3h 55m
2026-07-13 DAL331 - Jul 13, 03:25 UTCJul 13, 06:10 UTC2h 45m
2026-07-13 DAL331 - Jul 13, 02:20 UTCJul 13, 03:20 UTC1h 0m
2026-07-12 DAL693 SFO → ATL Jul 12, 19:40 UTCJul 13, 00:05 UTC4h 25m
2026-07-12 DAL693 ATL → SFO Jul 12, 12:40 UTCJul 12, 17:10 UTC4h 30m
2026-07-11 DAL528 LAX → ATL Jul 11, 18:45 UTCJul 11, 22:45 UTC4h 0m
2026-07-11 DAL898 ATL → LAX Jul 11, 13:15 UTCJul 11, 17:05 UTC3h 50m
2026-07-11 DAL898 ATL → LAX Jul 11, 13:12 UTCJul 11, 16:59 UTC3h 47m
2026-07-10 DAL542 - Jul 10, 20:55 UTCJul 11, 01:15 UTC4h 20m
2026-07-10 DAL774 ATL → SEA Jul 10, 14:00 UTCJul 10, 18:30 UTC4h 30m
2026-07-10 DAL495 - Jul 10, 07:15 UTCJul 10, 11:20 UTC4h 5m
2026-07-10 DAL495 SFO → ATL Jul 10, 07:14 UTCJul 10, 11:13 UTC3h 59m
2026-07-10 DAL495 ATL → SFO Jul 10, 01:05 UTCJul 10, 05:40 UTC4h 35m
2026-07-09 DAL528 LAX → ATL Jul 9, 18:16 UTCJul 9, 22:30 UTC4h 14m
2026-07-09 DAL528 LAX → ATL Jul 9, 18:20 UTCJul 9, 22:35 UTC4h 15m
2026-07-09 DAL898 ATL → LAX Jul 9, 12:35 UTCJul 9, 16:35 UTC4h 0m
2026-07-08 DAL542 SEA → ATL Jul 8, 21:00 UTCJul 9, 01:10 UTC4h 10m
2026-07-08 DAL774 ATL → SEA Jul 8, 14:00 UTCJul 8, 18:40 UTC4h 40m
2026-07-07 DAL725 - Jul 7, 18:10 UTCJul 7, 22:05 UTC3h 55m
2026-07-07 DAL725 ATL → SAN Jul 7, 12:20 UTCJul 7, 16:15 UTC3h 55m
2026-07-06 DAL693 - Jul 6, 19:00 UTCJul 6, 23:10 UTC4h 10m

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 N553DT page for operator, model, and routing details .

Mode-S A70AED frequently asked

What is Mode-S code A70AED?
A70AED is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N553DT.
Where is Mode-S A70AED registered?
Mode-S code A70AED 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 A70AED broadcasting right now?
No active broadcast right now. Last signal was 22d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70AED, octal 51605355, decimal 10,947,309.
What flights does A70AED operate?
Mode-S A70AED has broadcast 14 distinct callsigns, including DAL725, DAL693, DAL827, DAL446, DAL495.