Apparatus

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sensors Mode-S transponder

A41131

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N361NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A41131
Octal
51010461
Decimal
10,752,305
Country
US
Tail
N361NB
Type
A319
Broadcasting now · callsign DAL1281 · 37,025 ft
Flights observed
506
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Current position

A41131 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A41131 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
DAL2476 - 17 2026-07-20
DAL1454 - 14 2026-07-20
DAL2282 - 10 2026-07-17
DAL2766 - 9 2026-07-15
DAL2176 - 9 2026-07-12
DAL2975 - 8 2026-07-12
DAL2800 Delta Air Lines 8 2026-05-03
DAL2785 - 8 2026-07-03
DAL1517 - 8 2026-07-22
DAL978 - 7 2026-07-09
DAL1407 - 7 2026-07-18
DAL760 Delta Air Lines 6 2026-05-16
DAL2898 - 6 2026-07-09
DAL2797 - 6 2026-07-18
DAL2566 Delta Air Lines 6 2026-06-28
DAL2551 - 6 2026-07-13
DAL556 Delta Air Lines 5 2026-05-06
DAL2736 Delta Air Lines 5 2026-06-21
DAL2509 - 5 2026-07-03
DAL2497 - 5 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2316 DTW → MSN Jul 26, 20:15 UTCJul 26, 21:25 UTC1h 10m
2026-07-26 DAL2746 DFW → DTW Jul 26, 16:30 UTCJul 26, 18:40 UTC2h 10m
2026-07-26 DAL2746 DFW → DTW Jul 26, 16:27 UTCJul 26, 18:38 UTC2h 11m
2026-07-26 DAL2746 DFW → DTW Jul 26, 12:55 UTCJul 26, 15:00 UTC2h 5m
2026-07-23 DAL2598 ATL → PIT Jul 23, 21:05 UTCJul 23, 23:40 UTC2h 35m
2026-07-23 DAL2568 SFO → MSP Jul 23, 17:00 UTCJul 23, 19:35 UTC2h 35m
2026-07-23 DAL1354 IAD → ATL Jul 23, 12:35 UTCJul 23, 15:40 UTC3h 5m
2026-07-23 DAL1354 IAD → ATL Jul 23, 12:31 UTCJul 23, 15:32 UTC3h 1m
2026-07-23 DAL2243 JFK → MIA Jul 23, 01:35 UTCJul 23, 04:20 UTC2h 45m
2026-07-22 DAL1517 - Jul 22, 21:00 UTCJul 23, 00:00 UTC3h 0m
2026-07-22 DAL1517 - Jul 22, 17:00 UTCJul 22, 19:45 UTC2h 45m
2026-07-22 DAL1216 - Jul 22, 12:20 UTCJul 22, 15:15 UTC2h 55m
2026-07-22 DAL1633 DTW → IAH Jul 22, 02:10 UTCJul 22, 04:30 UTC2h 20m
2026-07-21 DAL1865 - Jul 21, 20:55 UTCJul 21, 23:15 UTC2h 20m
2026-07-21 DAL1864 - Jul 21, 16:55 UTCJul 21, 19:15 UTC2h 20m
2026-07-21 DAL2859 - Jul 21, 13:55 UTCJul 21, 15:25 UTC1h 30m
2026-07-21 DAL2859 - Jul 21, 11:15 UTCJul 21, 12:30 UTC1h 15m
2026-07-20 DAL1454 DCA → DTW Jul 20, 21:50 UTCJul 20, 23:02 UTC1h 12m
2026-07-20 DAL1454 DCA → DTW Jul 20, 21:50 UTCJul 20, 23:00 UTC1h 10m
2026-07-20 DAL1454 - Jul 20, 19:25 UTCJul 20, 20:30 UTC1h 5m
2026-07-20 DAL2476 DCA → DTW Jul 20, 16:50 UTCJul 20, 17:55 UTC1h 5m
2026-07-20 DAL2476 - Jul 20, 14:25 UTCJul 20, 15:25 UTC1h 0m
2026-07-19 DAL1454 DCA → DTW Jul 19, 21:50 UTCJul 19, 23:00 UTC1h 10m
2026-07-19 DAL1454 DCA → DTW Jul 19, 21:48 UTCJul 19, 22:55 UTC1h 7m
2026-07-19 DAL1454 - Jul 19, 19:15 UTCJul 19, 20:15 UTC1h 0m
2026-07-19 DAL2476 DCA → DTW Jul 19, 16:40 UTCJul 19, 17:45 UTC1h 5m
2026-07-19 DAL2476 - Jul 19, 14:10 UTCJul 19, 15:15 UTC1h 5m
2026-07-19 DAL2183 DFW → DTW Jul 19, 10:30 UTCJul 19, 12:45 UTC2h 15m
2026-07-19 DAL2183 DFW → DTW Jul 19, 10:29 UTCJul 19, 12:36 UTC2h 7m
2026-07-19 DAL1207 DTW → DFW Jul 19, 00:45 UTCJul 19, 03:05 UTC2h 20m
2026-07-19 DAL1207 DTW → DFW Jul 19, 00:42 UTCJul 19, 02:58 UTC2h 16m
2026-07-18 DAL1407 - Jul 18, 21:30 UTCJul 18, 23:00 UTC1h 30m
2026-07-18 DAL1407 DTW → RDU Jul 18, 18:45 UTCJul 18, 20:10 UTC1h 25m
2026-07-18 DAL2497 - Jul 18, 13:40 UTCJul 18, 16:20 UTC2h 40m
2026-07-18 DAL2797 SLC → SAT Jul 18, 04:05 UTCJul 18, 06:25 UTC2h 20m
2026-07-17 DAL417 SLC → SLC Jul 17, 22:15 UTCJul 18, 01:54 UTC3h 40m
2026-07-17 DAL2282 - Jul 17, 20:29 UTCJul 17, 21:00 UTC30m
2026-07-17 DAL2282 - Jul 17, 17:09 UTCJul 17, 17:35 UTC25m
2026-07-17 DAL2282 SLC → JAC Jul 17, 17:09 UTCJul 17, 17:44 UTC35m
2026-07-17 DAL2618 AUS → SLC Jul 17, 13:25 UTCJul 17, 16:00 UTC2h 35m
2026-07-16 DAL622 - Jul 16, 22:59 UTCJul 17, 01:35 UTC2h 35m
2026-07-16 DAL622 LAX → AUS Jul 16, 22:57 UTCJul 17, 01:36 UTC2h 39m
2026-07-16 DAL946 - Jul 16, 18:59 UTCJul 16, 21:35 UTC2h 35m
2026-07-16 DAL946 - Jul 16, 14:45 UTCJul 16, 17:35 UTC2h 50m
2026-07-16 DAL2459 PDX → LAX Jul 16, 03:25 UTCJul 16, 05:40 UTC2h 15m
2026-07-16 DAL2459 - Jul 16, 00:10 UTCJul 16, 02:00 UTC1h 50m
2026-07-15 DAL2766 - Jul 15, 20:35 UTCJul 15, 22:15 UTC1h 40m
2026-07-15 DAL2766 PDX → LAX Jul 15, 20:32 UTCJul 15, 22:31 UTC1h 59m
2026-07-15 DAL2766 - Jul 15, 17:15 UTCJul 15, 19:00 UTC1h 45m
2026-07-15 DAL2002 DEN → LAX Jul 15, 13:45 UTCJul 15, 15:40 UTC1h 55m

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 N361NB page for operator, model, and routing details .

Mode-S A41131 frequently asked

What is Mode-S code A41131?
A41131 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N361NB.
Where is Mode-S A41131 registered?
Mode-S code A41131 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 A41131 broadcasting right now?
Yes. Mode-S A41131 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A41131, octal 51010461, decimal 10,752,305.
What flights does A41131 operate?
Mode-S A41131 has broadcast 20 distinct callsigns, including DAL2476, DAL1454, DAL2282, DAL2766, DAL2176.