Apparatus

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sensors Mode-S transponder

A70BD1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N553NW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A70BD1
Octal
51605721
Decimal
10,947,537
Country
US
Tail
N553NW
Type
B752
No current signal · last broadcast 3h ago
Flights observed
416
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A70BD1.

Country allocation

The ICAO 24-bit address A70BD1 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
DAL2076 Delta Air Lines 10 2026-06-02
DAL913 Delta Air Lines 9 2026-06-01
DAL1070 Delta Air Lines 9 2026-06-01
DAL1756 Delta Air Lines 8 2026-06-28
DAL802 Delta Air Lines 7 2026-05-31
DAL497 Delta Air Lines 7 2026-06-23
DAL2238 Delta Air Lines 7 2026-06-22
DAL1937 - 7 2026-06-28
DAL523 Delta Air Lines 6 2026-05-31
DAL2614 - 6 2026-06-23
DAL1332 Delta Air Lines 6 2026-04-25
DAL1234 Delta Air Lines 6 2026-05-05
DAL492 - 5 2026-07-10
DAL2272 - 5 2026-06-23
DAL2262 Delta Air Lines 5 2026-06-24
DAL2204 - 5 2026-07-06
DAL1757 Delta Air Lines 5 2026-04-26
DAL1385 - 5 2026-07-08
DAL955 Delta Air Lines 4 2026-05-30
DAL945 Delta Air Lines 4 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL778 LAS → DTW Jul 13, 22:30 UTCJul 14, 02:10 UTC3h 40m
2026-07-13 DAL807 JFK → LAS Jul 13, 16:05 UTCJul 13, 20:25 UTC4h 20m
2026-07-13 DAL2420 ATL → JFK Jul 13, 12:05 UTCJul 13, 13:50 UTC1h 45m
2026-07-11 DAL1785 - Jul 11, 20:30 UTCJul 12, 00:05 UTC3h 35m
2026-07-11 DAL1785 UVF → ATL Jul 11, 19:38 UTCJul 11, 23:52 UTC4h 14m
2026-07-11 DAL2350 - Jul 11, 13:50 UTCJul 11, 17:10 UTC3h 20m
2026-07-11 DAL857 LAS → ATL Jul 11, 08:01 UTCJul 11, 11:25 UTC3h 25m
2026-07-11 DAL916 - Jul 11, 01:00 UTCJul 11, 04:45 UTC3h 45m
2026-07-10 DAL492 - Jul 10, 19:10 UTCJul 10, 22:55 UTC3h 45m
2026-07-10 DAL492 - Jul 10, 13:10 UTCJul 10, 17:20 UTC4h 10m
2026-07-10 DAL1566 PHX → DTW Jul 10, 07:20 UTCJul 10, 10:40 UTC3h 20m
2026-07-10 DAL757 - Jul 10, 01:15 UTCJul 10, 04:40 UTC3h 25m
2026-07-09 DAL1883 - Jul 9, 20:10 UTCJul 9, 23:30 UTC3h 20m
2026-07-09 DAL1902 PVR → DTW Jul 9, 14:50 UTCJul 9, 18:05 UTC3h 15m
2026-07-08 DAL591 LAS → ATL Jul 8, 23:10 UTCJul 9, 02:50 UTC3h 40m
2026-07-08 DAL421 - Jul 8, 17:55 UTCJul 8, 21:30 UTC3h 35m
2026-07-08 DAL1298 ATL → DTW Jul 8, 14:15 UTCJul 8, 15:40 UTC1h 25m
2026-07-08 DAL1385 RSW → ATL Jul 8, 10:06 UTCJul 8, 11:20 UTC1h 14m
2026-07-08 DAL1385 RSW → ATL Jul 8, 10:10 UTCJul 8, 11:25 UTC1h 15m
2026-07-08 DAL1217 ATL → RSW Jul 8, 03:29 UTCJul 8, 04:40 UTC1h 11m
2026-07-08 DAL1217 ATL → RSW Jul 8, 03:30 UTCJul 8, 04:45 UTC1h 15m
2026-07-07 DAL466 LAS → ATL Jul 7, 20:35 UTCJul 8, 00:10 UTC3h 35m
2026-07-07 DAL466 ATL → LAS Jul 7, 15:15 UTCJul 7, 18:45 UTC3h 30m
2026-07-07 DAL1463 MCO → ATL Jul 7, 12:17 UTCJul 7, 13:16 UTC59m
2026-07-07 DAL1463 MCO → ATL Jul 7, 12:20 UTCJul 7, 13:20 UTC1h 0m
2026-07-07 DAL2881 ATL → MCO Jul 7, 00:20 UTCJul 7, 01:20 UTC1h 0m
2026-07-06 DAL3157 MSY → ATL Jul 6, 20:20 UTCJul 6, 21:25 UTC1h 5m
2026-07-06 DAL3157 ATL → MSY Jul 6, 17:35 UTCJul 6, 18:40 UTC1h 5m
2026-07-06 DAL2204 MCO → ATL Jul 6, 14:30 UTCJul 6, 15:30 UTC1h 0m
2026-07-06 DAL2204 ATL → MCO Jul 6, 11:40 UTCJul 6, 12:40 UTC1h 0m
2026-07-06 DAL879 LAS → ATL Jul 6, 06:25 UTCJul 6, 09:50 UTC3h 25m
2026-07-06 DAL722 ATL → LAS Jul 6, 00:05 UTCJul 6, 04:00 UTC3h 55m
2026-07-05 DAL348 - Jul 5, 17:30 UTCJul 5, 20:50 UTC3h 20m
2026-07-05 DAL348 ATL → PHX Jul 5, 12:25 UTCJul 5, 15:55 UTC3h 30m
2026-07-04 DAL927 LAS → ATL Jul 4, 15:25 UTCJul 4, 19:05 UTC3h 40m
2026-07-04 DAL825 ATL → LAS Jul 4, 03:15 UTCJul 4, 06:50 UTC3h 35m
2026-07-03 DAL1101 ORF → ATL Jul 3, 23:55 UTCJul 4, 01:10 UTC1h 15m
2026-07-03 DAL1101 ATL → ORF Jul 3, 20:15 UTCJul 3, 21:30 UTC1h 15m
2026-07-03 DAL1213 ATL → MCO Jul 3, 15:20 UTCJul 3, 16:15 UTC55m
2026-07-03 DAL1213 ATL → MCO Jul 3, 12:55 UTCJul 3, 14:00 UTC1h 5m
2026-07-03 DAL929 PHX → ATL Jul 3, 07:05 UTCJul 3, 10:20 UTC3h 15m
2026-07-02 DAL757 - Jul 2, 23:55 UTCJul 3, 03:25 UTC3h 30m
2026-07-02 DAL777 BOS → ORD Jul 2, 17:55 UTCJul 2, 21:20 UTC3h 25m
2026-07-02 DAL777 BOS → ORD Jul 2, 12:35 UTCJul 2, 16:15 UTC3h 40m
2026-07-01 DAL2328 PHL → ATL Jul 1, 13:50 UTCJul 1, 14:35 UTC45m
2026-07-01 DAL2328 PHL → ATL Jul 1, 11:45 UTCJul 1, 12:30 UTC45m
2026-06-30 DAL406 ATL → ATL Jun 30, 15:10 UTCJun 30, 23:40 UTC8h 30m
2026-06-30 DAL2569 - Jun 30, 12:30 UTCJun 30, 13:15 UTC45m
2026-06-30 DAL1001 ATL → JAX Jun 30, 02:00 UTCJun 30, 03:30 UTC1h 30m
2026-06-29 DAL587 - Jun 29, 19:39 UTCJun 29, 22:24 UTC2h 45m

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 N553NW page for operator, model, and routing details .

Mode-S A70BD1 frequently asked

What is Mode-S code A70BD1?
A70BD1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N553NW.
Where is Mode-S A70BD1 registered?
Mode-S code A70BD1 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 A70BD1 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70BD1, octal 51605721, decimal 10,947,537.
What flights does A70BD1 operate?
Mode-S A70BD1 has broadcast 20 distinct callsigns, including DAL2076, DAL913, DAL1070, DAL1756, DAL802.