Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A7BF22

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N599DA · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A7BF22
Octal
51737442
Decimal
10,993,442
Country
US
Tail
N599DA
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
375
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A7BF22.

Country allocation

The ICAO 24-bit address A7BF22 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
DAL2033 Delta Air Lines 12 2026-06-13
DAL756 - 6 2026-07-04
DAL697 Delta Air Lines 6 2026-06-11
DAL458 Delta Air Lines 6 2026-05-25
DAL358 Delta Air Lines 6 2026-06-24
DAL346 Delta Air Lines 6 2026-04-15
DAL2500 Delta Air Lines 6 2026-04-26
DAL2049 Delta Air Lines 6 2026-06-09
DAL2045 - 6 2026-07-12
DAL2024 - 6 2026-06-29
DAL749 Delta Air Lines 5 2026-05-31
DAL653 - 5 2026-06-26
DAL356 - 5 2026-07-06
DAL2040 Delta Air Lines 5 2026-05-29
DAL2021 Delta Air Lines 5 2026-05-29
DAL1210 Delta Air Lines 5 2026-05-24
DAL1090 - 5 2026-06-24
DAL1070 - 5 2026-07-11
DAL899 - 4 2026-06-30
DAL820 Delta Air Lines 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL2198 LAX → MSP Jul 13, 22:40 UTCJul 14, 01:50 UTC3h 10m
2026-07-13 DAL895 ATL → LAX Jul 13, 17:05 UTCJul 13, 21:00 UTC3h 55m
2026-07-13 DAL2605 TPA → ATL Jul 13, 14:15 UTCJul 13, 15:20 UTC1h 5m
2026-07-13 DAL2605 TPA → ATL Jul 13, 14:15 UTCJul 13, 15:23 UTC1h 8m
2026-07-13 DAL2605 ATL → TPA Jul 13, 11:40 UTCJul 13, 12:40 UTC1h 0m
2026-07-12 DAL2053 - Jul 12, 22:30 UTCJul 13, 00:05 UTC1h 35m
2026-07-12 DAL470 - Jul 12, 17:10 UTCJul 12, 20:40 UTC3h 30m
2026-07-12 DAL470 LAS → DTW Jul 12, 17:09 UTCJul 12, 20:41 UTC3h 32m
2026-07-12 DAL659 ATL → LAS Jul 12, 11:55 UTCJul 12, 15:35 UTC3h 40m
2026-07-12 DAL2045 - Jul 12, 00:10 UTCJul 12, 01:35 UTC1h 25m
2026-07-12 DAL2045 DTW → ATL Jul 12, 00:06 UTCJul 12, 01:31 UTC1h 25m
2026-07-11 DAL1070 - Jul 11, 18:55 UTCJul 11, 22:20 UTC3h 25m
2026-07-11 DAL1070 - Jul 11, 12:50 UTCJul 11, 16:25 UTC3h 35m
2026-07-11 DAL9973 JFK → DTW Jul 11, 04:45 UTCJul 11, 06:10 UTC1h 25m
2026-07-09 DAL1961 - Jul 9, 22:10 UTCJul 10, 01:35 UTC3h 25m
2026-07-09 DAL1961 - Jul 9, 17:15 UTCJul 9, 20:45 UTC3h 30m
2026-07-08 DAL683 - Jul 8, 20:25 UTCJul 9, 01:20 UTC4h 55m
2026-07-08 DAL683 - Jul 8, 13:10 UTCJul 8, 18:15 UTC5h 5m
2026-07-08 DAL2139 PDX → JFK Jul 8, 05:50 UTCJul 8, 10:30 UTC4h 40m
2026-07-07 DAL2151 MSP → PDX Jul 7, 23:50 UTCJul 8, 03:00 UTC3h 10m
2026-07-07 DAL413 - Jul 7, 18:45 UTCJul 7, 21:50 UTC3h 5m
2026-07-07 DAL413 LAX → MSP Jul 7, 18:43 UTCJul 7, 21:45 UTC3h 2m
2026-07-07 DAL800 - Jul 7, 12:20 UTCJul 7, 17:00 UTC4h 40m
2026-07-06 DAL338 SEA → FLL Jul 6, 20:10 UTCJul 7, 01:40 UTC5h 30m
2026-07-06 DAL356 PPM → SEA Jul 6, 12:25 UTCJul 6, 18:05 UTC5h 40m
2026-07-05 DAL338 SEA → FLL Jul 5, 20:10 UTCJul 6, 01:50 UTC5h 40m
2026-07-05 DAL356 - Jul 5, 12:25 UTCJul 5, 18:10 UTC5h 45m
2026-07-05 DAL477 - Jul 5, 05:55 UTCJul 5, 10:25 UTC4h 30m
2026-07-04 DAL2122 - Jul 4, 23:50 UTCJul 5, 03:00 UTC3h 10m
2026-07-04 DAL1103 BOS → MSP Jul 4, 16:05 UTCJul 4, 18:45 UTC2h 40m
2026-07-04 DAL2649 TPA → BOS Jul 4, 12:20 UTCJul 4, 14:35 UTC2h 15m
2026-07-04 DAL756 - Jul 4, 01:40 UTCJul 4, 04:55 UTC3h 15m
2026-07-03 DAL756 MSP → SFO Jul 3, 20:20 UTCJul 3, 23:55 UTC3h 35m
2026-07-03 DAL1103 BOS → MSP Jul 3, 16:15 UTCJul 3, 18:50 UTC2h 35m
2026-07-03 DAL2649 TPA → BOS Jul 3, 12:15 UTCJul 3, 14:35 UTC2h 20m
2026-07-03 DAL756 SFO → MSP Jul 3, 01:55 UTCJul 3, 05:00 UTC3h 5m
2026-07-02 DAL756 MSP → SFO Jul 2, 20:45 UTCJul 3, 00:25 UTC3h 40m
2026-07-02 DAL1103 BOS → MSP Jul 2, 16:05 UTCJul 2, 18:40 UTC2h 35m
2026-07-02 DAL2649 TPA → BOS Jul 2, 12:15 UTCJul 2, 14:35 UTC2h 20m
2026-07-02 DAL756 SFO → MSP Jul 2, 01:40 UTCJul 2, 04:50 UTC3h 10m
2026-07-01 DAL756 MSP → SFO Jul 1, 20:15 UTCJul 1, 23:55 UTC3h 40m
2026-07-01 DAL1103 BOS → MSP Jul 1, 16:20 UTCJul 1, 19:00 UTC2h 40m
2026-07-01 DAL2649 TPA → BOS Jul 1, 12:35 UTCJul 1, 14:55 UTC2h 20m
2026-06-30 DAL2198 - Jun 30, 22:40 UTCJul 1, 01:35 UTC2h 55m
2026-06-30 DAL895 ATL → LAX Jun 30, 17:05 UTCJun 30, 21:20 UTC4h 15m
2026-06-30 DAL926 DCA → ATL Jun 30, 14:30 UTCJun 30, 15:45 UTC1h 15m
2026-06-30 DAL926 ATL → DCA Jun 30, 11:35 UTCJun 30, 13:00 UTC1h 25m
2026-06-30 DAL899 - Jun 30, 06:05 UTCJun 30, 09:50 UTC3h 45m
2026-06-29 DAL872 - Jun 29, 23:34 UTCJun 30, 04:05 UTC4h 30m
2026-06-29 DAL2024 SLC → MCO Jun 29, 17:38 UTCJun 29, 21:40 UTC4h 2m

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 N599DA page for operator, model, and routing details .

Mode-S A7BF22 frequently asked

What is Mode-S code A7BF22?
A7BF22 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N599DA.
Where is Mode-S A7BF22 registered?
Mode-S code A7BF22 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 A7BF22 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 A7BF22, octal 51737442, decimal 10,993,442.
What flights does A7BF22 operate?
Mode-S A7BF22 has broadcast 20 distinct callsigns, including DAL2033, DAL756, DAL697, DAL458, DAL358.