Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB7AE4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N839MH · BOEING 767-400 · operated by DELTA AIR LINES INC

Hex
AB7AE4
Octal
52675344
Decimal
11,238,116
Country
US
Tail
N839MH
Type
B764
No current signal · last broadcast 3h ago
Flights observed
234
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S AB7AE4.

Country allocation

The ICAO 24-bit address AB7AE4 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
DAL91 - 14 2026-07-01
DAL33 - 14 2026-07-10
DAL130 - 14 2026-07-13
DAL90 - 13 2026-06-30
DAL131 - 13 2026-07-14
DAL174 Delta Air Lines 12 2026-05-30
DAL175 Delta Air Lines 11 2026-05-31
DAL30 - 10 2026-07-10
DAL32 Delta Air Lines 7 2026-06-19
DAL60 - 6 2026-06-21
DAL98 - 5 2026-07-03
DAL97 - 5 2026-07-03
DAL36 - 5 2026-07-11
DAL31 Delta Air Lines 5 2026-06-19
DAL266 - 5 2026-07-03
DAL24 Delta Air Lines 5 2026-07-02
DAL177 Delta Air Lines 5 2026-04-23
DAL176 Delta Air Lines 5 2026-04-23
DAL141 - 5 2026-04-13
DAL84 Delta Air Lines 4 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL131 - Jul 14, 09:00 UTCJul 14, 11:20 UTC2h 20m
2026-07-13 DAL130 ATL → MUC Jul 13, 21:45 UTCJul 14, 06:40 UTC8h 55m
2026-07-11 DAL37 LHR → ATL Jul 11, 15:00 UTCJul 11, 23:40 UTC8h 40m
2026-07-11 DAL36 ATL → LHR Jul 11, 04:07 UTCJul 11, 11:46 UTC7h 39m
2026-07-11 DAL36 - Jul 11, 04:10 UTCJul 11, 06:50 UTC2h 40m
2026-07-10 DAL33 LHR → ATL Jul 10, 08:45 UTCJul 10, 17:30 UTC8h 45m
2026-07-10 DAL30 - Jul 10, 04:45 UTCJul 10, 06:10 UTC1h 25m
2026-07-09 DAL30 ATL → LHR Jul 9, 22:22 UTCJul 10, 06:03 UTC7h 41m
2026-07-09 DAL30 - Jul 9, 22:25 UTCJul 10, 01:10 UTC2h 45m
2026-07-09 DAL131 MUC → ATL Jul 9, 09:00 UTCJul 9, 18:45 UTC9h 45m
2026-07-08 DAL130 ATL → MUC Jul 8, 22:20 UTCJul 9, 07:05 UTC8h 45m
2026-07-07 DAL99 - Jul 7, 13:25 UTCJul 7, 22:00 UTC8h 35m
2026-07-07 DAL99 CDG → ATL Jul 7, 13:24 UTCJul 7, 22:01 UTC8h 37m
2026-07-07 DAL262 JFK → CDG Jul 7, 04:20 UTCJul 7, 10:57 UTC6h 37m
2026-07-07 DAL262 - Jul 7, 04:20 UTCJul 7, 11:00 UTC6h 40m
2026-07-06 DAL53 ZRH → JFK Jul 6, 19:20 UTCJul 6, 21:10 UTC1h 50m
2026-07-06 DAL53 ZRH → JFK Jul 6, 12:55 UTCJul 6, 15:10 UTC2h 15m
2026-07-06 DAL52 JFK → ZRH Jul 6, 02:15 UTCJul 6, 09:03 UTC6h 48m
2026-07-06 DAL52 - Jul 6, 02:15 UTCJul 6, 03:00 UTC45m
2026-07-05 DAL951 LAX → JFK Jul 5, 17:20 UTCJul 5, 22:15 UTC4h 55m
2026-07-04 DAL747 JFK → LAX Jul 4, 18:15 UTCJul 4, 23:55 UTC5h 40m
2026-07-04 DAL267 - Jul 4, 08:00 UTCJul 4, 15:50 UTC7h 50m
2026-07-03 DAL98 - Jul 3, 21:45 UTCJul 4, 00:15 UTC2h 30m
2026-07-03 DAL98 CVG → CDG Jul 3, 21:40 UTCJul 4, 05:12 UTC7h 32m
2026-07-03 DAL97 - Jul 3, 10:25 UTCJul 3, 11:55 UTC1h 30m
2026-07-03 DAL97 CDG → CVG Jul 3, 10:24 UTCJul 3, 19:07 UTC8h 43m
2026-07-03 DAL266 JFK → CDG Jul 3, 01:19 UTCJul 3, 07:47 UTC6h 28m
2026-07-03 DAL266 - Jul 3, 01:20 UTCJul 3, 02:50 UTC1h 30m
2026-07-02 DAL29 CDG → ATL Jul 2, 12:10 UTCJul 2, 20:10 UTC8h 0m
2026-07-02 DAL24 ATL → DUS Jul 2, 01:16 UTCJul 2, 10:03 UTC8h 47m
2026-07-02 DAL24 ATL → DUS Jul 2, 01:20 UTCJul 2, 10:15 UTC8h 55m
2026-07-01 DAL91 ZRH → ATL Jul 1, 08:35 UTCJul 1, 18:35 UTC10h 0m
2026-06-30 DAL90 ATL → ZRH Jun 30, 21:25 UTCJul 1, 05:50 UTC8h 25m
2026-06-30 DAL131 MUC → ATL Jun 30, 08:45 UTCJun 30, 18:15 UTC9h 30m
2026-06-29 DAL130 ATL → MUC Jun 29, 22:10 UTCJun 30, 06:40 UTC8h 31m
2026-06-29 DAL130 ATL → MUC Jun 29, 22:08 UTCJun 30, 06:38 UTC8h 30m
2026-06-29 DAL25 NCE → ATL Jun 29, 08:39 UTCJun 29, 18:14 UTC9h 35m
2026-06-28 DAL28 JFK → NCE Jun 28, 22:32 UTCJun 29, 05:37 UTC7h 5m
2026-06-28 DAL28 - Jun 28, 22:34 UTCJun 29, 05:00 UTC6h 25m
2026-06-28 DAL934 DTW → SAN Jun 28, 13:29 UTCJun 28, 18:19 UTC4h 50m
2026-06-27 DAL747 JFK → LAX Jun 27, 18:35 UTCJun 27, 23:45 UTC5h 10m
2026-06-27 DAL267 - Jun 27, 08:20 UTCJun 27, 15:39 UTC7h 20m
2026-06-26 DAL98 - Jun 26, 21:15 UTCJun 27, 04:29 UTC7h 15m
2026-06-26 DAL97 - Jun 26, 10:25 UTCJun 26, 12:00 UTC1h 35m
2026-06-26 DAL97 CDG → CVG Jun 26, 10:24 UTCJun 26, 18:55 UTC8h 31m
2026-06-26 DAL266 - Jun 26, 01:15 UTCJun 26, 07:45 UTC6h 30m
2026-06-25 DAL29 CDG → ATL Jun 25, 12:20 UTCJun 25, 20:33 UTC8h 13m
2026-06-25 DAL29 CDG → ATL Jun 25, 12:20 UTCJun 25, 20:33 UTC8h 13m
2026-06-25 DAL29 CDG → ATL Jun 25, 12:25 UTCJun 25, 13:00 UTC35m
2026-06-25 DAL24 ATL → DUS Jun 25, 01:04 UTCJun 25, 09:40 UTC8h 35m

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 N839MH page for operator, model, and routing details .

Mode-S AB7AE4 frequently asked

What is Mode-S code AB7AE4?
AB7AE4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N839MH.
Where is Mode-S AB7AE4 registered?
Mode-S code AB7AE4 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 AB7AE4 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 AB7AE4, octal 52675344, decimal 11,238,116.
What flights does AB7AE4 operate?
Mode-S AB7AE4 has broadcast 20 distinct callsigns, including DAL91, DAL33, DAL130, DAL90, DAL131.