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
No current signal · last broadcast 1h ago
Flights observed
450
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A41131.

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 - 13 2026-06-27
DAL2176 - 9 2026-07-12
DAL2975 - 8 2026-07-12
DAL2800 Delta Air Lines 8 2026-05-03
DAL2785 - 8 2026-07-03
DAL1454 - 8 2026-06-27
DAL978 - 7 2026-07-09
DAL2282 Delta Air Lines 7 2026-06-09
DAL760 Delta Air Lines 6 2026-05-16
DAL2898 - 6 2026-07-09
DAL2766 - 6 2026-07-01
DAL2566 Delta Air Lines 6 2026-06-28
DAL2551 - 6 2026-07-13
DAL1517 Delta Air Lines 6 2026-05-29
DAL556 Delta Air Lines 5 2026-05-06
DAL2797 Delta Air Lines 5 2026-06-10
DAL2736 Delta Air Lines 5 2026-06-21
DAL2509 - 5 2026-07-03
DAL2283 - 5 2026-07-04
DAL2207 Delta Air Lines 5 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL948 - Jul 14, 02:45 UTCJul 14, 05:20 UTC2h 35m
2026-07-13 DAL948 LAX → DFW Jul 13, 21:15 UTCJul 14, 00:20 UTC3h 5m
2026-07-13 DAL2965 SJC → LAX Jul 13, 19:09 UTCJul 13, 20:00 UTC51m
2026-07-13 DAL2965 SJC → LAX Jul 13, 19:10 UTCJul 13, 20:10 UTC1h 0m
2026-07-13 DAL2965 LAX → SJC Jul 13, 17:00 UTCJul 13, 17:45 UTC45m
2026-07-13 DAL1654 - Jul 13, 15:00 UTCJul 13, 16:00 UTC1h 0m
2026-07-13 DAL3073 - Jul 13, 04:05 UTCJul 13, 04:50 UTC45m
2026-07-13 DAL3073 LAX → SJC Jul 13, 04:00 UTCJul 13, 04:45 UTC45m
2026-07-13 DAL2551 PDX → LAX Jul 13, 00:40 UTCJul 13, 02:45 UTC2h 5m
2026-07-12 DAL2551 - Jul 12, 21:35 UTCJul 12, 23:20 UTC1h 45m
2026-07-12 DAL2975 - Jul 12, 18:05 UTCJul 12, 20:15 UTC2h 10m
2026-07-12 DAL2975 - Jul 12, 14:01 UTCJul 12, 15:45 UTC1h 45m
2026-07-12 DAL2176 DEN → LAX Jul 12, 02:15 UTCJul 12, 04:05 UTC1h 50m
2026-07-11 DAL2176 - Jul 11, 22:10 UTCJul 12, 00:05 UTC1h 55m
2026-07-11 DAL2641 PHX → LAX Jul 11, 19:35 UTCJul 11, 20:35 UTC1h 0m
2026-07-11 DAL2641 PHX → LAX Jul 11, 19:35 UTCJul 11, 20:29 UTC54m
2026-07-11 DAL2641 - Jul 11, 17:25 UTCJul 11, 18:30 UTC1h 5m
2026-07-11 DAL2176 DEN → LAX Jul 11, 02:45 UTCJul 11, 05:10 UTC2h 25m
2026-07-10 DAL2176 LAX → DEN Jul 10, 22:50 UTCJul 11, 00:50 UTC2h 0m
2026-07-10 DAL521 DFW → LAX Jul 10, 18:55 UTCJul 10, 21:40 UTC2h 45m
2026-07-10 DAL521 - Jul 10, 14:50 UTCJul 10, 17:35 UTC2h 45m
2026-07-10 DAL1584 - Jul 10, 01:35 UTCJul 10, 04:10 UTC2h 35m
2026-07-09 DAL1612 - Jul 9, 21:45 UTCJul 10, 00:15 UTC2h 30m
2026-07-09 DAL1043 - Jul 9, 16:50 UTCJul 9, 19:30 UTC2h 40m
2026-07-09 DAL1043 IAH → DTW Jul 9, 16:45 UTCJul 9, 19:39 UTC2h 54m
2026-07-09 DAL1043 - Jul 9, 13:15 UTCJul 9, 15:30 UTC2h 15m
2026-07-09 DAL2898 - Jul 9, 10:40 UTCJul 9, 11:20 UTC40m
2026-07-09 DAL978 - Jul 9, 03:05 UTCJul 9, 03:45 UTC40m
2026-07-09 DAL978 DTW → BUF Jul 9, 03:01 UTCJul 9, 03:41 UTC40m
2026-07-09 DAL2030 DCA → DTW Jul 9, 00:05 UTCJul 9, 01:10 UTC1h 5m
2026-07-08 DAL2030 - Jul 8, 21:40 UTCJul 8, 22:40 UTC1h 0m
2026-07-08 DAL1218 AUS → DTW Jul 8, 17:15 UTCJul 8, 19:50 UTC2h 35m
2026-07-08 DAL1218 - Jul 8, 13:15 UTCJul 8, 15:40 UTC2h 25m
2026-07-08 DAL2292 - Jul 8, 11:10 UTCJul 8, 11:45 UTC35m
2026-07-08 DAL2424 - Jul 8, 03:15 UTCJul 8, 03:45 UTC30m
2026-07-07 DAL2994 - Jul 7, 22:30 UTCJul 8, 00:15 UTC1h 45m
2026-07-07 DAL2994 - Jul 7, 19:20 UTCJul 7, 21:20 UTC2h 0m
2026-07-07 DAL1407 - Jul 7, 16:10 UTCJul 7, 17:20 UTC1h 10m
2026-07-07 DAL1018 - Jul 7, 14:35 UTCJul 7, 14:55 UTC20m
2026-07-07 DAL1018 FLL → RDU Jul 7, 14:33 UTCJul 7, 14:54 UTC21m
2026-07-06 DAL1018 - Jul 6, 22:15 UTCJul 7, 00:20 UTC2h 5m
2026-07-06 DAL1038 MCO → FLL Jul 6, 20:05 UTCJul 6, 20:45 UTC40m
2026-07-06 DAL1038 RDU → MCO Jul 6, 16:15 UTCJul 6, 18:30 UTC2h 15m
2026-07-06 DAL1279 TPA → RDU Jul 6, 13:20 UTCJul 6, 14:45 UTC1h 25m
2026-07-06 DAL1279 - Jul 6, 10:50 UTCJul 6, 12:15 UTC1h 25m
2026-07-06 DAL1275 TPA → RDU Jul 6, 01:45 UTCJul 6, 03:15 UTC1h 30m
2026-07-05 DAL1275 - Jul 5, 23:25 UTCJul 6, 00:50 UTC1h 25m
2026-07-05 DAL1018 FLL → RDU Jul 5, 20:25 UTCJul 5, 22:15 UTC1h 50m
2026-07-05 DAL1038 - Jul 5, 16:10 UTCJul 5, 17:45 UTC1h 35m
2026-07-05 DAL1038 RDU → FLL Jul 5, 16:05 UTCJul 5, 17:38 UTC1h 33m

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?
No active broadcast right now. Last signal was 1h ago.
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, DAL2176, DAL2975, DAL2800, DAL2785.