Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB1FFE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N816DN · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
AB1FFE
Octal
52617776
Decimal
11,214,846
Country
US
Tail
N816DN
Type
B739
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
465
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S AB1FFE.

Country allocation

The ICAO 24-bit address AB1FFE 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
DAL2843 - 10 2026-07-08
DAL874 Delta Air Lines 8 2026-05-21
DAL539 Delta Air Lines 6 2026-07-16
DAL2229 - 6 2026-07-17
DAL717 Delta Air Lines 5 2026-07-23
DAL553 - 5 2026-07-20
DAL861 - 4 2026-07-20
DAL801 - 4 2026-07-01
DAL768 - 4 2026-07-12
DAL719 Delta Air Lines 4 2026-06-20
DAL574 - 4 2026-07-08
DAL3106 - 4 2026-07-13
DAL2951 Delta Air Lines 4 2026-07-26
DAL2854 - 4 2026-07-18
DAL2778 Delta Air Lines 4 2026-06-12
DAL2074 Delta Air Lines 4 2026-07-23
DAL1593 - 4 2026-07-12
DAL1584 Delta Air Lines 4 2026-05-07
DAL1002 Delta Air Lines 4 2026-04-14
DAL944 - 3 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3142 ATL → BNA Jul 26, 19:35 UTCJul 26, 20:15 UTC40m
2026-07-26 DAL2951 DTW → MSN Jul 26, 16:00 UTCJul 26, 17:55 UTC1h 55m
2026-07-26 DAL2951 DTW → MSN Jul 26, 12:25 UTCJul 26, 14:20 UTC1h 55m
2026-07-26 DAL2966 RDU → LGA Jul 26, 09:35 UTCJul 26, 10:50 UTC1h 15m
2026-07-26 DAL2984 ATL → ORF Jul 26, 00:05 UTCJul 26, 01:20 UTC1h 15m
2026-07-25 DAL2427 SAN → MSP Jul 25, 20:05 UTCJul 25, 22:30 UTC2h 25m
2026-07-25 DAL2427 SAN → MSP Jul 25, 15:50 UTCJul 25, 18:20 UTC2h 30m
2026-07-25 DAL1653 MIA → LGA Jul 25, 12:40 UTCJul 25, 14:00 UTC1h 20m
2026-07-24 DAL361 DTW → SFO Jul 24, 19:05 UTCJul 24, 23:00 UTC3h 55m
2026-07-24 DAL361 DTW → SFO Jul 24, 12:50 UTCJul 24, 17:20 UTC4h 30m
2026-07-23 DAL717 SAN → ATL Jul 23, 22:50 UTCJul 24, 02:40 UTC3h 50m
2026-07-23 DAL717 SAN → ATL Jul 23, 22:49 UTCJul 24, 02:46 UTC3h 57m
2026-07-23 DAL2074 MSP → IND Jul 23, 17:50 UTCJul 23, 21:15 UTC3h 25m
2026-07-23 DAL2473 ATL → JFK Jul 23, 12:15 UTCJul 23, 14:45 UTC2h 30m
2026-07-22 DAL2454 MSP → LAS Jul 22, 23:05 UTCJul 23, 01:15 UTC2h 10m
2026-07-22 DAL2093 JFK → TPA Jul 22, 18:54 UTCJul 22, 21:09 UTC2h 15m
2026-07-22 DAL2093 JFK → TPA Jul 22, 18:55 UTCJul 22, 21:15 UTC2h 20m
2026-07-22 DAL2380 MSY → LGA Jul 22, 15:35 UTCJul 22, 17:20 UTC1h 45m
2026-07-22 DAL3129 - Jul 22, 12:05 UTCJul 22, 12:55 UTC50m
2026-07-22 DAL3021 ATL → PNS Jul 22, 01:40 UTCJul 22, 02:25 UTC45m
2026-07-21 DAL1008 - Jul 21, 22:30 UTCJul 21, 23:40 UTC1h 10m
2026-07-21 DAL1008 ATL → CVG Jul 21, 19:50 UTCJul 21, 21:15 UTC1h 25m
2026-07-21 DAL677 - Jul 21, 14:30 UTCJul 21, 18:05 UTC3h 35m
2026-07-21 DAL2202 JFK → MIA Jul 21, 03:15 UTCJul 21, 04:00 UTC45m
2026-07-20 DAL861 - Jul 20, 21:40 UTCJul 21, 01:20 UTC3h 39m
2026-07-20 DAL861 - Jul 20, 16:20 UTCJul 20, 20:05 UTC3h 45m
2026-07-20 DAL553 - Jul 20, 14:05 UTCJul 20, 14:45 UTC40m
2026-07-20 DAL553 LAS → LAX Jul 20, 14:01 UTCJul 20, 14:39 UTC38m
2026-07-20 DAL2202 - Jul 20, 03:15 UTCJul 20, 04:00 UTC45m
2026-07-19 DAL861 IND → LAX Jul 19, 22:05 UTCJul 20, 01:45 UTC3h 40m
2026-07-19 DAL861 - Jul 19, 16:50 UTCJul 19, 20:35 UTC3h 45m
2026-07-19 DAL891 - Jul 19, 11:45 UTCJul 19, 15:20 UTC3h 35m
2026-07-18 DAL858 EWR → ATL Jul 18, 21:10 UTCJul 19, 00:55 UTC3h 45m
2026-07-18 DAL1071 LAS → LAX Jul 18, 17:00 UTCJul 18, 17:40 UTC40m
2026-07-18 DAL1071 LAS → LAX Jul 18, 16:54 UTCJul 18, 17:31 UTC37m
2026-07-18 DAL2253 - Jul 18, 14:25 UTCJul 18, 15:10 UTC45m
2026-07-18 DAL2854 SEA → LAX Jul 18, 03:35 UTCJul 18, 05:55 UTC2h 20m
2026-07-17 DAL944 - Jul 17, 21:30 UTCJul 18, 01:20 UTC3h 50m
2026-07-17 DAL944 - Jul 17, 21:05 UTCJul 17, 21:25 UTC20m
2026-07-17 DAL1519 MSP → DTW Jul 17, 18:19 UTCJul 17, 19:30 UTC1h 10m
2026-07-17 DAL2229 SMF → MSP Jul 17, 14:00 UTCJul 17, 16:59 UTC3h 0m
2026-07-17 DAL682 ATL → SMF Jul 17, 01:20 UTCJul 17, 05:35 UTC4h 15m
2026-07-16 DAL539 ATL → PDX Jul 16, 19:10 UTCJul 16, 23:35 UTC4h 25m
2026-07-16 DAL539 ATL → PDX Jul 16, 19:10 UTCJul 16, 23:28 UTC4h 18m
2026-07-16 DAL539 ATL → PDX Jul 16, 13:15 UTCJul 16, 17:40 UTC4h 25m
2026-07-16 DAL2469 - Jul 16, 10:10 UTCJul 16, 11:15 UTC1h 5m
2026-07-16 DAL2469 CMH → ATL Jul 16, 10:05 UTCJul 16, 11:13 UTC1h 8m
2026-07-16 DAL1545 ATL → CMH Jul 16, 00:45 UTCJul 16, 01:55 UTC1h 10m
2026-07-15 DAL2545 - Jul 15, 20:35 UTCJul 15, 21:50 UTC1h 15m
2026-07-15 DAL2545 ATL → CLE Jul 15, 17:45 UTCJul 15, 19:00 UTC1h 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 N816DN page for operator, model, and routing details .

Mode-S AB1FFE frequently asked

What is Mode-S code AB1FFE?
AB1FFE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N816DN.
Where is Mode-S AB1FFE registered?
Mode-S code AB1FFE 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 AB1FFE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1FFE, octal 52617776, decimal 11,214,846.
What flights does AB1FFE operate?
Mode-S AB1FFE has broadcast 20 distinct callsigns, including DAL2843, DAL874, DAL539, DAL2229, DAL717.