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 Jul 26, 22:30 UTC
Flights observed
433
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

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 Delta Air Lines 10 2026-07-22
DAL2649 Delta Air Lines 10 2026-07-22
DAL356 - 8 2026-07-18
DAL653 Delta Air Lines 7 2026-07-24
DAL697 Delta Air Lines 6 2026-06-11
DAL458 Delta Air Lines 6 2026-05-25
DAL413 - 6 2026-07-19
DAL358 Delta Air Lines 6 2026-06-24
DAL346 Delta Air Lines 6 2026-04-15
DAL338 Delta Air Lines 6 2026-07-18
DAL2500 Delta Air Lines 6 2026-04-26
DAL2103 - 6 2026-07-16
DAL2049 Delta Air Lines 6 2026-06-09
DAL2045 - 6 2026-07-12
DAL2024 - 6 2026-06-29
DAL1103 Delta Air Lines 6 2026-07-21
DAL749 Delta Air Lines 5 2026-05-31
DAL2040 Delta Air Lines 5 2026-05-29
DAL2021 Delta Air Lines 5 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1655 DEN → LGA Jul 26, 21:20 UTCJul 26, 22:30 UTC1h 10m
2026-07-26 DAL400 ATL → EWR Jul 26, 14:30 UTCJul 26, 19:40 UTC5h 10m
2026-07-25 DAL860 LGA → ATL Jul 25, 15:15 UTCJul 25, 21:00 UTC5h 45m
2026-07-25 DAL860 LGA → ATL Jul 25, 15:12 UTCJul 25, 21:00 UTC5h 48m
2026-07-25 DAL1697 AUS → BOS Jul 25, 05:38 UTCJul 25, 10:14 UTC4h 36m
2026-07-25 DAL1697 AUS → BOS Jul 25, 05:40 UTCJul 25, 10:10 UTC4h 30m
2026-07-24 DAL514 LGA → ATL Jul 24, 22:15 UTCJul 25, 03:10 UTC4h 55m
2026-07-24 DAL657 JFK → LAX Jul 24, 16:05 UTCJul 24, 20:00 UTC3h 55m
2026-07-24 DAL1270 SEA → MCI Jul 24, 12:50 UTCJul 24, 14:15 UTC1h 25m
2026-07-24 DAL1373 PHX → SLC Jul 24, 05:20 UTCJul 24, 06:50 UTC1h 30m
2026-07-24 DAL653 ATL → SLC Jul 24, 00:00 UTCJul 24, 03:35 UTC3h 35m
2026-07-23 DAL653 ATL → SLC Jul 23, 23:59 UTCJul 24, 03:25 UTC3h 26m
2026-07-23 DAL885 SFO → MSP Jul 23, 17:30 UTCJul 23, 20:40 UTC3h 10m
2026-07-23 DAL2025 MCO → MSP Jul 23, 11:30 UTCJul 23, 15:30 UTC4h 0m
2026-07-23 DAL2069 SLC → SFO Jul 23, 05:45 UTCJul 23, 09:35 UTC3h 50m
2026-07-22 DAL445 BOS → ATL Jul 22, 23:25 UTCJul 23, 04:15 UTC4h 50m
2026-07-22 DAL2649 TPA → BOS Jul 22, 12:31 UTCJul 22, 14:41 UTC2h 10m
2026-07-22 DAL2649 TPA → BOS Jul 22, 12:35 UTCJul 22, 14:30 UTC1h 55m
2026-07-22 DAL756 MSP → LAX Jul 22, 02:30 UTCJul 22, 05:25 UTC2h 55m
2026-07-21 DAL756 MSP → LAX Jul 21, 21:35 UTCJul 22, 01:05 UTC3h 30m
2026-07-21 DAL1103 MCO → MSP Jul 21, 17:05 UTCJul 21, 20:00 UTC2h 55m
2026-07-21 DAL2649 MSP → BOS Jul 21, 12:25 UTCJul 21, 14:50 UTC2h 25m
2026-07-21 DAL2649 MSP → BOS Jul 21, 12:20 UTCJul 21, 14:46 UTC2h 26m
2026-07-21 DAL2359 PDX → MSP Jul 21, 08:15 UTCJul 21, 11:00 UTC2h 45m
2026-07-21 DAL2391 MSP → PDX Jul 21, 03:35 UTCJul 21, 06:45 UTC3h 10m
2026-07-20 DAL1661 PDX → MSP Jul 20, 22:15 UTCJul 21, 01:00 UTC2h 44m
2026-07-20 DAL1574 BOS → LGA Jul 20, 14:35 UTCJul 20, 20:00 UTC5h 25m
2026-07-20 DAL2139 - Jul 20, 05:50 UTCJul 20, 10:20 UTC4h 30m
2026-07-19 DAL2151 ATL → CVG Jul 19, 23:50 UTCJul 20, 03:15 UTC3h 25m
2026-07-19 DAL413 MSP → MSP Jul 19, 22:05 UTCJul 19, 22:10 UTC5m
2026-07-19 DAL413 LAX → MSP Jul 19, 18:40 UTCJul 19, 22:10 UTC3h 30m
2026-07-19 DAL413 LAX → MSP Jul 19, 18:40 UTCJul 19, 21:47 UTC3h 7m
2026-07-19 DAL800 - Jul 19, 12:05 UTCJul 19, 16:40 UTC4h 35m
2026-07-18 DAL338 JFK → SAN Jul 18, 20:30 UTCJul 19, 02:00 UTC5h 30m
2026-07-18 DAL356 - Jul 18, 12:50 UTCJul 18, 18:15 UTC5h 25m
2026-07-17 DAL338 SEA → FLL Jul 17, 21:20 UTCJul 18, 02:45 UTC5h 25m
2026-07-17 DAL356 - Jul 17, 13:50 UTCJul 17, 19:15 UTC5h 25m
2026-07-17 DAL356 FLL → SEA Jul 17, 13:47 UTCJul 17, 19:09 UTC5h 22m
2026-07-17 DAL477 - Jul 17, 07:14 UTCJul 17, 12:10 UTC4h 55m
2026-07-17 DAL1559 - Jul 17, 04:20 UTCJul 17, 05:15 UTC55m
2026-07-17 DAL1559 - Jul 17, 01:55 UTCJul 17, 02:54 UTC1h 0m
2026-07-16 DAL753 - Jul 16, 19:05 UTCJul 16, 22:59 UTC3h 55m
2026-07-16 DAL753 ATL → LAX Jul 16, 19:04 UTCJul 16, 23:00 UTC3h 56m
2026-07-16 DAL390 - Jul 16, 13:20 UTCJul 16, 17:25 UTC4h 5m
2026-07-16 DAL2103 MSP → LAX Jul 16, 03:17 UTCJul 16, 06:20 UTC3h 3m
2026-07-16 DAL2103 - Jul 16, 03:20 UTCJul 16, 06:20 UTC3h 0m
2026-07-15 DAL2935 SLC → MSP Jul 15, 23:30 UTCJul 16, 01:35 UTC2h 5m
2026-07-15 DAL2935 SLC → MSP Jul 15, 23:26 UTCJul 16, 01:30 UTC2h 4m
2026-07-15 DAL2658 MSP → SLC Jul 15, 19:45 UTCJul 15, 22:05 UTC2h 20m
2026-07-15 DAL2658 MSP → SLC Jul 15, 19:44 UTCJul 15, 21:59 UTC2h 15m

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 Jul 26, 22:30 UTC.
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, DAL2649, DAL356, DAL653.