Apparatus

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sensors Mode-S transponder

A7081A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N552NW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A7081A
Octal
51604032
Decimal
10,946,586
Country
US
Tail
N552NW
Type
B752
No current signal · last broadcast Jul 24, 02:20 UTC
Flights observed
422
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 02:20 UTC

Last known position

Most recent position reported by Mode-S A7081A.

Country allocation

The ICAO 24-bit address A7081A 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
DAL796 Delta Air Lines 11 2026-07-17
DAL1902 Delta Air Lines 10 2026-07-11
DAL391 - 8 2026-07-18
DAL406 Delta Air Lines 7 2026-06-10
DAL824 Delta Air Lines 6 2026-05-15
DAL795 Delta Air Lines 6 2026-07-02
DAL466 - 6 2026-07-12
DAL1746 - 6 2026-07-10
DAL1167 - 6 2026-04-17
DAL759 Delta Air Lines 5 2026-07-22
DAL757 Delta Air Lines 5 2026-07-23
DAL492 - 5 2026-07-14
DAL447 - 5 2026-06-29
DAL411 - 5 2026-06-28
DAL3128 Delta Air Lines 5 2026-04-17
DAL2569 - 5 2026-07-11
DAL2326 Delta Air Lines 5 2026-06-02
DAL2262 Delta Air Lines 5 2026-06-22
DAL1756 Delta Air Lines 5 2026-07-20
DAL1611 - 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 DAL901 BOS → ATL Jul 23, 22:50 UTCJul 24, 02:10 UTC3h 20m
2026-07-23 DAL757 JFK → SFO Jul 23, 01:10 UTCJul 23, 04:25 UTC3h 15m
2026-07-22 DAL759 SFO → ATL Jul 22, 22:15 UTCJul 22, 23:20 UTC1h 5m
2026-07-22 DAL759 SFO → ATL Jul 22, 19:40 UTCJul 22, 20:40 UTC1h 0m
2026-07-22 DAL965 - Jul 22, 12:25 UTCJul 22, 13:55 UTC1h 30m
2026-07-21 DAL2171 PDX → DTW Jul 21, 19:20 UTCJul 21, 22:45 UTC3h 25m
2026-07-21 DAL2171 - Jul 21, 13:20 UTCJul 21, 17:35 UTC4h 15m
2026-07-21 DAL1566 PHX → DTW Jul 21, 08:00 UTCJul 21, 11:20 UTC3h 20m
2026-07-21 DAL1566 PHX → DTW Jul 21, 07:59 UTCJul 21, 11:20 UTC3h 21m
2026-07-21 DAL757 JFK → SFO Jul 21, 01:00 UTCJul 21, 06:55 UTC5h 55m
2026-07-20 DAL1756 SJO → ATL Jul 20, 19:10 UTCJul 20, 22:45 UTC3h 35m
2026-07-20 DAL1937 BOS → MSP Jul 20, 14:05 UTCJul 20, 15:35 UTC1h 30m
2026-07-20 DAL1937 BOS → MSP Jul 20, 14:01 UTCJul 20, 17:35 UTC3h 34m
2026-07-20 DAL1611 - Jul 20, 10:30 UTCJul 20, 11:55 UTC1h 25m
2026-07-19 DAL778 - Jul 19, 22:40 UTCJul 20, 02:10 UTC3h 30m
2026-07-19 DAL807 JFK → LAS Jul 19, 16:30 UTCJul 19, 21:00 UTC4h 30m
2026-07-19 DAL2420 ATL → JFK Jul 19, 12:40 UTCJul 19, 14:25 UTC1h 45m
2026-07-19 DAL2420 ATL → JFK Jul 19, 12:39 UTCJul 19, 14:27 UTC1h 48m
2026-07-19 DAL879 LGA → ATL Jul 19, 06:05 UTCJul 19, 09:40 UTC3h 35m
2026-07-19 DAL879 LGA → ATL Jul 19, 06:02 UTCJul 19, 09:39 UTC3h 37m
2026-07-19 DAL722 ATL → LAS Jul 19, 01:00 UTCJul 19, 04:25 UTC3h 25m
2026-07-18 DAL793 JFK → ATL Jul 18, 13:15 UTCJul 18, 21:50 UTC8h 35m
2026-07-18 DAL391 - Jul 18, 08:05 UTCJul 18, 11:40 UTC3h 35m
2026-07-18 DAL391 - Jul 18, 02:05 UTCJul 18, 05:55 UTC3h 51m
2026-07-17 DAL796 ATL → PHX Jul 17, 20:25 UTCJul 17, 23:55 UTC3h 30m
2026-07-17 DAL796 ATL → PHX Jul 17, 15:25 UTCJul 17, 18:40 UTC3h 15m
2026-07-17 DAL1463 MCO → ATL Jul 17, 12:19 UTCJul 17, 13:15 UTC55m
2026-07-17 DAL2881 ATL → MCO Jul 17, 00:45 UTCJul 17, 01:49 UTC1h 5m
2026-07-16 DAL8878 - Jul 16, 21:10 UTCJul 16, 22:59 UTC1h 50m
2026-07-16 DAL8878 - Jul 16, 17:20 UTCJul 16, 20:00 UTC2h 40m
2026-07-16 DAL8878 ATL → BWI Jul 16, 12:49 UTCJul 16, 14:10 UTC1h 20m
2026-07-15 DAL2856 - Jul 15, 17:00 UTCJul 15, 18:25 UTC1h 25m
2026-07-15 DAL2059 - Jul 15, 09:45 UTCJul 15, 15:00 UTC5h 15m
2026-07-15 DAL1134 - Jul 15, 01:35 UTCJul 15, 08:05 UTC6h 30m
2026-07-14 DAL492 SAN → DTW Jul 14, 19:30 UTCJul 14, 23:30 UTC3h 59m
2026-07-14 DAL492 - Jul 14, 14:15 UTCJul 14, 18:05 UTC3h 50m
2026-07-14 DAL1646 ATL → DTW Jul 14, 11:15 UTCJul 14, 12:40 UTC1h 25m
2026-07-13 DAL2345 - Jul 13, 23:00 UTCJul 14, 00:40 UTC1h 40m
2026-07-13 DAL2345 ATL → FLL Jul 13, 19:40 UTCJul 13, 21:10 UTC1h 30m
2026-07-13 DAL918 - Jul 13, 12:55 UTCJul 13, 16:05 UTC3h 10m
2026-07-13 DAL842 - Jul 13, 02:45 UTCJul 13, 06:01 UTC3h 15m
2026-07-12 DAL466 LAS → ATL Jul 12, 20:50 UTCJul 13, 00:45 UTC3h 55m
2026-07-12 DAL466 ATL → LAS Jul 12, 15:15 UTCJul 12, 19:10 UTC3h 55m
2026-07-12 DAL1463 MCO → ATL Jul 12, 12:20 UTCJul 12, 13:20 UTC1h 0m
2026-07-12 DAL2035 ATL → MCO Jul 12, 01:55 UTCJul 12, 02:55 UTC1h 0m
2026-07-11 DAL1883 - Jul 11, 19:55 UTCJul 11, 23:20 UTC3h 25m
2026-07-11 DAL1883 STT → ATL Jul 11, 19:48 UTCJul 11, 23:18 UTC3h 30m
2026-07-11 DAL1902 PVR → DTW Jul 11, 18:00 UTCJul 11, 18:15 UTC15m
2026-07-11 DAL1902 PVR → DTW Jul 11, 14:55 UTCJul 11, 16:20 UTC1h 25m
2026-07-11 DAL2569 - Jul 11, 12:30 UTCJul 11, 13:15 UTC45m

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 N552NW page for operator, model, and routing details .

Mode-S A7081A frequently asked

What is Mode-S code A7081A?
A7081A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N552NW.
Where is Mode-S A7081A registered?
Mode-S code A7081A 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 A7081A broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 02:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7081A, octal 51604032, decimal 10,946,586.
What flights does A7081A operate?
Mode-S A7081A has broadcast 20 distinct callsigns, including DAL796, DAL1902, DAL391, DAL406, DAL824.