Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB4BF7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N827MH · BOEING 767-400 · operated by DELTA AIR LINES INC

Hex
AB4BF7
Octal
52645767
Decimal
11,226,103
Country
US
Tail
N827MH
Type
B764
No current signal · last broadcast 2h ago
Flights observed
261
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AB4BF7.

Country allocation

The ICAO 24-bit address AB4BF7 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
DAL90 - 14 2026-07-03
DAL91 - 13 2026-07-03
DAL30 - 13 2026-07-12
DAL288 - 13 2026-06-23
DAL289 - 12 2026-06-23
DAL131 - 11 2026-07-12
DAL130 - 10 2026-07-11
DAL33 - 9 2026-07-13
DAL83 Delta Air Lines 7 2026-06-03
DAL61 - 7 2026-07-14
DAL263 - 7 2026-07-07
DAL958 Delta Air Lines 6 2026-06-06
DAL60 - 6 2026-07-10
DAL53 Delta Air Lines 6 2026-06-08
DAL52 Delta Air Lines 6 2026-06-08
DAL262 - 6 2026-07-04
DAL25 - 6 2026-07-08
DAL100 - 6 2026-07-06
DAL99 Delta Air Lines 5 2026-07-05
DAL707 Delta Air Lines 5 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL61 - Jul 14, 04:00 UTCJul 14, 05:20 UTC1h 20m
2026-07-13 DAL33 - Jul 13, 08:35 UTCJul 13, 16:50 UTC8h 15m
2026-07-12 DAL30 - Jul 12, 21:25 UTCJul 12, 23:40 UTC2h 15m
2026-07-12 DAL30 ATL → LHR Jul 12, 21:25 UTCJul 13, 05:18 UTC7h 53m
2026-07-12 DAL131 MUC → ATL Jul 12, 08:45 UTCJul 12, 18:15 UTC9h 30m
2026-07-12 DAL131 MUC → ATL Jul 12, 08:44 UTCJul 12, 18:13 UTC9h 29m
2026-07-11 DAL130 ATL → MUC Jul 11, 21:45 UTCJul 12, 06:22 UTC8h 37m
2026-07-11 DAL130 - Jul 11, 21:45 UTCJul 12, 00:35 UTC2h 50m
2026-07-11 DAL33 LHR → ATL Jul 11, 08:45 UTCJul 11, 17:10 UTC8h 25m
2026-07-10 DAL30 ATL → LHR Jul 10, 21:20 UTCJul 11, 05:10 UTC7h 50m
2026-07-10 DAL60 - Jul 10, 03:50 UTCJul 10, 10:35 UTC6h 45m
2026-07-10 DAL60 - Jul 10, 01:40 UTCJul 10, 01:55 UTC15m
2026-07-09 DAL61 - Jul 9, 14:45 UTCJul 9, 23:25 UTC8h 40m
2026-07-09 DAL61 ATL → GIG Jul 9, 14:41 UTCJul 9, 23:22 UTC8h 41m
2026-07-08 DAL25 NCE → ATL Jul 8, 08:35 UTCJul 8, 18:00 UTC9h 25m
2026-07-07 DAL28 JFK → NCE Jul 7, 22:35 UTCJul 8, 06:00 UTC7h 25m
2026-07-07 DAL263 - Jul 7, 10:30 UTCJul 7, 17:55 UTC7h 25m
2026-07-07 DAL263 CDG → JFK Jul 7, 10:28 UTCJul 7, 17:49 UTC7h 21m
2026-07-06 DAL100 - Jul 6, 22:50 UTCJul 7, 01:45 UTC2h 55m
2026-07-06 DAL100 ATL → CDG Jul 6, 22:47 UTCJul 7, 06:40 UTC7h 53m
2026-07-06 DAL131 MUC → ATL Jul 6, 10:20 UTCJul 6, 20:00 UTC9h 40m
2026-07-05 DAL130 ATL → MUC Jul 5, 23:55 UTCJul 6, 08:20 UTC8h 25m
2026-07-05 DAL99 BUD → JFK Jul 5, 10:35 UTCJul 5, 11:40 UTC1h 5m
2026-07-05 DAL99 BUD → JFK Jul 5, 10:34 UTCJul 5, 19:44 UTC9h 10m
2026-07-05 DAL99 BUD → JFK Jul 5, 10:34 UTCJul 5, 19:39 UTC9h 5m
2026-07-04 DAL262 - Jul 4, 23:35 UTCJul 5, 01:05 UTC1h 30m
2026-07-04 DAL262 JFK → CDG Jul 4, 23:35 UTCJul 5, 06:07 UTC6h 32m
2026-07-04 DAL263 - Jul 4, 09:55 UTCJul 4, 11:45 UTC1h 50m
2026-07-04 DAL263 CDG → JFK Jul 4, 09:52 UTCJul 4, 17:41 UTC7h 49m
2026-07-04 DAL263 CDG → JFK Jul 4, 09:52 UTCJul 4, 17:52 UTC8h 0m
2026-07-03 DAL100 JFK → GVA Jul 3, 22:27 UTCJul 4, 06:19 UTC7h 52m
2026-07-03 DAL100 JFK → GVA Jul 3, 22:30 UTCJul 4, 01:35 UTC3h 5m
2026-07-03 DAL91 ZRH → ATL Jul 3, 09:11 UTCJul 3, 18:46 UTC9h 35m
2026-07-03 DAL91 ZRH → ATL Jul 3, 09:15 UTCJul 3, 18:45 UTC9h 30m
2026-07-03 DAL90 - Jul 3, 01:00 UTCJul 3, 06:25 UTC5h 25m
2026-07-02 DAL90 ATL → ZRH Jul 2, 22:15 UTCJul 3, 06:28 UTC8h 13m
2026-07-02 DAL90 - Jul 2, 22:15 UTCJul 3, 00:55 UTC2h 40m
2026-07-02 DAL33 - Jul 2, 08:35 UTCJul 2, 17:15 UTC8h 40m
2026-07-02 DAL33 LHR → ATL Jul 2, 08:33 UTCJul 2, 17:15 UTC8h 42m
2026-07-01 DAL30 ATL → LHR Jul 1, 21:45 UTCJul 2, 05:25 UTC7h 40m
2026-06-30 DAL31 LHR → ATL Jun 30, 12:40 UTCJun 30, 21:15 UTC8h 35m
2026-06-30 DAL32 ATL → LHR Jun 30, 02:10 UTCJun 30, 10:10 UTC8h 0m
2026-06-29 DAL37 - Jun 29, 14:54 UTCJun 29, 16:10 UTC1h 15m
2026-06-29 DAL37 LHR → ATL Jun 29, 14:52 UTCJun 29, 23:21 UTC8h 29m
2026-06-29 DAL36 ATL → LHR Jun 29, 04:00 UTCJun 29, 11:50 UTC7h 50m
2026-06-28 DAL37 - Jun 28, 15:20 UTCJun 28, 23:50 UTC8h 30m
2026-06-28 DAL36 ATL → LHR Jun 28, 03:59 UTCJun 28, 11:29 UTC7h 30m
2026-06-27 DAL9907 - Jun 27, 15:49 UTCJun 28, 00:35 UTC8h 45m
2026-06-27 DAL9907 LHR → ATL Jun 27, 15:45 UTCJun 28, 00:31 UTC8h 46m
2026-06-26 DAL36 ATL → LHR Jun 26, 04:00 UTCJun 26, 11:30 UTC7h 30m

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 N827MH page for operator, model, and routing details .

Mode-S AB4BF7 frequently asked

What is Mode-S code AB4BF7?
AB4BF7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N827MH.
Where is Mode-S AB4BF7 registered?
Mode-S code AB4BF7 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 AB4BF7 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4BF7, octal 52645767, decimal 11,226,103.
What flights does AB4BF7 operate?
Mode-S AB4BF7 has broadcast 20 distinct callsigns, including DAL90, DAL91, DAL30, DAL288, DAL289.