Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB4FD4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N828NW · AIRBUS A-330-300 · operated by BANK OF UTAH TRUSTEE

Hex
AB4FD4
Octal
52647724
Decimal
11,227,092
Country
US
Tail
N828NW
Type
A333
Broadcasting now · callsign DAL277 · 34,000 ft
Flights observed
239
Distinct callsigns
20
Country
US
Last broadcast
23m ago

Current position

AB4FD4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB4FD4 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
DAL229 Delta Air Lines 12 2026-06-14
DAL194 - 11 2026-07-13
DAL837 - 10 2026-06-22
DAL312 Delta Air Lines 10 2026-06-23
DAL231 Delta Air Lines 10 2026-04-15
DAL153 - 10 2026-06-13
DAL313 - 9 2026-06-23
DAL129 Delta Air Lines 9 2026-07-04
DAL128 Delta Air Lines 9 2026-07-03
DAL309 - 8 2026-06-24
DAL152 Delta Air Lines 8 2026-06-13
DAL126 - 8 2026-07-03
DAL259 Delta Air Lines 7 2026-05-06
DAL195 - 7 2026-07-07
DAL228 Delta Air Lines 6 2026-06-12
DAL185 Delta Air Lines 6 2026-04-14
DAL276 - 5 2026-07-14
DAL251 - 5 2026-07-13
DAL945 Delta Air Lines 4 2026-04-22
DAL258 Delta Air Lines 4 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL277 - Jul 14, 10:45 UTCJul 14, 11:00 UTC15m
2026-07-14 DAL276 BOS → MXP Jul 14, 00:52 UTCJul 14, 07:53 UTC7h 1m
2026-07-14 DAL276 BOS → MXP Jul 14, 00:55 UTCJul 14, 07:55 UTC7h 0m
2026-07-13 DAL251 BCN → BOS Jul 13, 15:05 UTCJul 13, 22:30 UTC7h 25m
2026-07-13 DAL194 ATL → BCN Jul 13, 04:16 UTCJul 13, 12:33 UTC8h 17m
2026-07-13 DAL194 ATL → BCN Jul 13, 04:20 UTCJul 13, 12:40 UTC8h 20m
2026-07-12 DAL177 DUB → ATL Jul 12, 11:35 UTCJul 12, 20:05 UTC8h 30m
2026-07-12 DAL177 DUB → ATL Jul 12, 11:33 UTCJul 12, 20:05 UTC8h 32m
2026-07-12 DAL176 - Jul 12, 02:01 UTCJul 12, 09:20 UTC7h 20m
2026-07-11 DAL9905 ARN → JFK Jul 11, 19:45 UTCJul 11, 20:05 UTC20m
2026-07-11 DAL9905 ARN → JFK Jul 11, 09:43 UTCJul 11, 19:29 UTC9h 46m
2026-07-11 DAL9905 ARN → JFK Jul 11, 09:45 UTCJul 11, 12:00 UTC2h 15m
2026-07-09 DAL174 ATL → MXP Jul 9, 23:22 UTCJul 10, 08:06 UTC8h 44m
2026-07-09 DAL174 ATL → MXP Jul 9, 23:25 UTCJul 10, 08:15 UTC8h 50m
2026-07-09 DAL175 MXP → ATL Jul 9, 10:22 UTCJul 9, 20:15 UTC9h 53m
2026-07-09 DAL175 MXP → ATL Jul 9, 10:25 UTCJul 9, 20:15 UTC9h 50m
2026-07-09 DAL276 - Jul 9, 00:20 UTCJul 9, 07:50 UTC7h 30m
2026-07-08 DAL251 BCN → BOS Jul 8, 13:30 UTCJul 8, 20:50 UTC7h 20m
2026-07-08 DAL251 BCN → BOS Jul 8, 13:28 UTCJul 8, 20:49 UTC7h 21m
2026-07-08 DAL194 ATL → BCN Jul 8, 02:05 UTCJul 8, 10:30 UTC8h 25m
2026-07-07 DAL195 BCN → ATL Jul 7, 09:41 UTCJul 7, 18:56 UTC9h 15m
2026-07-07 DAL195 - Jul 7, 09:45 UTCJul 7, 11:15 UTC1h 30m
2026-07-06 DAL250 BOS → BCN Jul 6, 23:35 UTCJul 7, 06:35 UTC7h 0m
2026-07-06 DAL113 FCO → BOS Jul 6, 11:30 UTCJul 6, 14:30 UTC3h 0m
2026-07-06 DAL113 FCO → BOS Jul 6, 11:30 UTCJul 6, 19:54 UTC8h 24m
2026-07-06 DAL206 - Jul 6, 00:35 UTCJul 6, 08:50 UTC8h 15m
2026-07-05 DAL135 AMS → DTW Jul 5, 10:06 UTCJul 5, 18:12 UTC8h 6m
2026-07-05 DAL135 AMS → DTW Jul 5, 10:10 UTCJul 5, 17:00 UTC6h 50m
2026-07-04 DAL46 JFK → AMS Jul 4, 22:43 UTCJul 5, 05:09 UTC6h 26m
2026-07-04 DAL129 JFK → BCN Jul 4, 10:05 UTCJul 4, 18:05 UTC8h 0m
2026-07-03 DAL128 BCN → JFK Jul 3, 23:51 UTCJul 4, 07:00 UTC7h 9m
2026-07-03 DAL128 BCN → JFK Jul 3, 23:55 UTCJul 4, 07:00 UTC7h 5m
2026-07-03 DAL127 MAD → JFK Jul 3, 11:20 UTCJul 3, 18:55 UTC7h 35m
2026-07-03 DAL126 JFK → MAD Jul 3, 01:50 UTCJul 3, 08:40 UTC6h 50m
2026-07-02 DAL129 JFK → BCN Jul 2, 09:15 UTCJul 2, 17:05 UTC7h 50m
2026-07-01 DAL128 BCN → JFK Jul 1, 23:37 UTCJul 2, 06:43 UTC7h 6m
2026-07-01 DAL128 BCN → JFK Jul 1, 23:40 UTCJul 2, 06:41 UTC7h 1m
2026-07-01 DAL183 - Jul 1, 08:45 UTCJul 1, 17:40 UTC8h 55m
2026-07-01 DAL183 FCO → JFK Jul 1, 08:44 UTCJul 1, 17:37 UTC8h 53m
2026-06-30 DAL182 JFK → FCO Jun 30, 21:40 UTCJul 1, 05:25 UTC7h 45m
2026-06-30 DAL203 ATH → JFK Jun 30, 07:15 UTCJun 30, 17:10 UTC9h 55m
2026-06-29 DAL202 JFK → ATH Jun 29, 19:16 UTCJun 30, 04:04 UTC8h 48m
2026-06-29 DAL202 - Jun 29, 19:20 UTCJun 30, 03:00 UTC7h 41m
2026-06-29 DAL47 - Jun 29, 08:39 UTCJun 29, 16:00 UTC7h 20m
2026-06-29 DAL47 AMS → JFK Jun 29, 08:35 UTCJun 29, 16:02 UTC7h 27m
2026-06-28 DAL46 JFK → AMS Jun 28, 22:59 UTCJun 29, 05:40 UTC6h 41m
2026-06-28 DAL46 - Jun 28, 22:59 UTCJun 29, 05:40 UTC6h 40m
2026-06-28 DAL129 JFK → BCN Jun 28, 09:25 UTCJun 28, 17:30 UTC8h 5m
2026-06-27 DAL128 BCN → JFK Jun 27, 23:10 UTCJun 28, 00:15 UTC1h 5m
2026-06-27 DAL128 BCN → JFK Jun 27, 23:09 UTCJun 28, 06:04 UTC6h 55m

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 N828NW page for operator, model, and routing details .

Mode-S AB4FD4 frequently asked

What is Mode-S code AB4FD4?
AB4FD4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N828NW.
Where is Mode-S AB4FD4 registered?
Mode-S code AB4FD4 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 AB4FD4 broadcasting right now?
Yes. Mode-S AB4FD4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4FD4, octal 52647724, decimal 11,227,092.
What flights does AB4FD4 operate?
Mode-S AB4FD4 has broadcast 20 distinct callsigns, including DAL229, DAL194, DAL837, DAL312, DAL231.