Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0F4A2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1604R · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A0F4A2
Octal
50172242
Decimal
10,548,386
Country
US
Tail
N1604R
Type
B763
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
306
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A0F4A2.

Country allocation

The ICAO 24-bit address A0F4A2 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
DAL233 Delta Air Lines 18 2026-07-26
DAL244 Delta Air Lines 15 2026-07-26
DAL45 - 13 2026-07-04
DAL245 - 13 2026-07-03
DAL668 Delta Air Lines 12 2026-06-01
DAL44 - 12 2026-07-04
DAL232 Delta Air Lines 12 2026-07-25
DAL155 Delta Air Lines 12 2026-06-12
DAL154 - 11 2026-06-22
DAL217 - 10 2026-07-02
DAL93 Delta Air Lines 8 2026-07-22
DAL92 Delta Air Lines 8 2026-07-21
DAL205 - 7 2026-06-20
DAL204 - 7 2026-06-19
DAL679 - 6 2026-06-30
DAL416 - 6 2026-06-17
DAL219 Delta Air Lines 6 2026-07-23
DAL216 Delta Air Lines 5 2026-07-01
DAL114 Delta Air Lines 5 2026-06-18
DAL738 Delta Air Lines 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL244 CDG → JFK Jul 26, 21:10 UTCJul 26, 22:30 UTC1h 20m
2026-07-26 DAL233 CDG → MSP Jul 26, 09:15 UTCJul 26, 18:15 UTC9h 0m
2026-07-25 DAL232 MSP → CDG Jul 25, 22:20 UTCJul 26, 06:10 UTC7h 50m
2026-07-25 DAL149 FCO → JFK Jul 25, 09:10 UTCJul 25, 12:25 UTC3h 15m
2026-07-25 DAL149 FCO → JFK Jul 25, 09:07 UTCJul 25, 18:47 UTC9h 40m
2026-07-24 DAL148 JFK → FCO Jul 24, 21:35 UTCJul 25, 05:55 UTC8h 20m
2026-07-24 DAL148 JFK → FCO Jul 24, 21:35 UTCJul 25, 05:58 UTC8h 23m
2026-07-24 DAL960 SLC → CVG Jul 24, 04:25 UTCJul 24, 09:00 UTC4h 35m
2026-07-23 DAL738 BOS → SLC Jul 23, 19:55 UTCJul 24, 01:25 UTC5h 30m
2026-07-23 DAL219 CDG → MSP Jul 23, 07:50 UTCJul 23, 10:05 UTC2h 15m
2026-07-23 DAL219 CDG → MSP Jul 23, 07:43 UTCJul 23, 16:11 UTC8h 28m
2026-07-22 DAL218 JFK → CPH Jul 22, 21:20 UTCJul 23, 04:30 UTC7h 10m
2026-07-22 DAL93 BER → JFK Jul 22, 08:09 UTCJul 22, 16:28 UTC8h 19m
2026-07-21 DAL93 BER → JFK Jul 21, 23:55 UTCJul 22, 16:30 UTC16h 35m
2026-07-21 DAL92 JFK → BER Jul 21, 22:40 UTCJul 21, 23:50 UTC1h 10m
2026-07-21 DAL92 JFK → BER Jul 21, 22:29 UTCJul 22, 06:12 UTC7h 43m
2026-07-21 DAL247 KEF → JFK Jul 21, 12:25 UTCJul 21, 17:55 UTC5h 30m
2026-07-21 DAL246 JFK → KEF Jul 21, 09:30 UTCJul 21, 09:55 UTC25m
2026-07-21 DAL246 JFK → KEF Jul 21, 05:10 UTCJul 21, 06:55 UTC1h 45m
2026-07-20 DAL939 LAX → JFK Jul 20, 20:40 UTCJul 21, 01:30 UTC4h 50m
2026-07-20 DAL713 BOS → LAX Jul 20, 14:00 UTCJul 20, 18:45 UTC4h 45m
2026-07-20 DAL650 JFK → ATL Jul 20, 02:05 UTCJul 20, 10:45 UTC8h 40m
2026-07-19 DAL307 - Jul 19, 14:55 UTCJul 20, 00:05 UTC9h 10m
2026-07-19 DAL310 LGA → ATL Jul 19, 07:40 UTCJul 19, 12:00 UTC4h 20m
2026-07-19 DAL310 LGA → ATL Jul 19, 04:05 UTCJul 19, 04:15 UTC10m
2026-07-18 DAL307 - Jul 18, 20:55 UTCJul 19, 01:55 UTC5h 0m
2026-07-18 DAL307 - Jul 18, 17:00 UTCJul 18, 20:50 UTC3h 50m
2026-07-18 DAL310 - Jul 18, 01:00 UTCJul 18, 09:10 UTC8h 11m
2026-07-17 DAL480 - Jul 17, 15:49 UTCJul 17, 21:15 UTC5h 25m
2026-07-17 DAL480 LAX → HNL Jul 17, 15:47 UTCJul 17, 21:02 UTC5h 15m
2026-07-16 DAL773 JFK → LAX Jul 16, 13:54 UTCJul 16, 18:55 UTC5h 0m
2026-07-15 DAL991 LAX → JFK Jul 15, 20:35 UTCJul 16, 01:45 UTC5h 10m
2026-07-15 DAL773 JFK → LAX Jul 15, 13:20 UTCJul 15, 18:15 UTC4h 55m
2026-07-15 DAL650 - Jul 15, 02:25 UTCJul 15, 11:35 UTC9h 10m
2026-07-14 DAL316 - Jul 14, 23:55 UTCJul 15, 00:15 UTC20m
2026-07-14 DAL316 - Jul 14, 18:15 UTCJul 14, 20:05 UTC1h 50m
2026-07-14 DAL316 SLC → HNL Jul 14, 18:13 UTCJul 15, 00:08 UTC5h 55m
2026-07-12 DAL397 - Jul 12, 13:15 UTCJul 12, 14:50 UTC1h 35m
2026-07-11 DAL623 - Jul 11, 17:40 UTCJul 11, 19:25 UTC1h 45m
2026-07-11 DAL534 - Jul 11, 06:05 UTCJul 11, 11:25 UTC5h 20m
2026-07-11 DAL636 - Jul 11, 00:50 UTCJul 11, 01:05 UTC15m
2026-07-10 DAL636 - Jul 10, 14:55 UTCJul 10, 20:35 UTC5h 40m
2026-07-10 DAL636 JFK → HNL Jul 10, 14:51 UTCJul 11, 01:03 UTC10h 12m
2026-07-10 DAL650 - Jul 10, 02:10 UTCJul 10, 11:05 UTC8h 55m
2026-07-09 DAL307 - Jul 9, 14:45 UTCJul 9, 23:40 UTC8h 55m
2026-07-09 DAL310 - Jul 9, 01:00 UTCJul 9, 08:55 UTC7h 55m
2026-07-08 DAL480 - Jul 8, 15:45 UTCJul 8, 16:30 UTC45m
2026-07-08 DAL480 LAX → HNL Jul 8, 15:44 UTCJul 8, 21:02 UTC5h 18m
2026-07-07 DAL738 JFK → LAX Jul 7, 19:25 UTCJul 8, 00:40 UTC5h 15m
2026-07-07 DAL287 MXP → JFK Jul 7, 07:10 UTCJul 7, 15:25 UTC8h 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 N1604R page for operator, model, and routing details .

Mode-S A0F4A2 frequently asked

What is Mode-S code A0F4A2?
A0F4A2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1604R.
Where is Mode-S A0F4A2 registered?
Mode-S code A0F4A2 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 A0F4A2 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 A0F4A2, octal 50172242, decimal 10,548,386.
What flights does A0F4A2 operate?
Mode-S A0F4A2 has broadcast 20 distinct callsigns, including DAL233, DAL244, DAL45, DAL245, DAL668.