Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB34F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821DX · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
AB34F3
Octal
52632363
Decimal
11,220,211
Country
US
Tail
N821DX
Type
B752
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
473
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S AB34F3.

Country allocation

The ICAO 24-bit address AB34F3 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
DAL1048 Delta Air Lines 28 2026-07-23
DAL261 Delta Air Lines 23 2026-07-23
DAL260 Delta Air Lines 23 2026-07-21
DAL2171 Delta Air Lines 22 2026-07-25
DAL664 Delta Air Lines 17 2026-04-30
DAL2284 Delta Air Lines 14 2026-06-06
DAL1747 Delta Air Lines 14 2026-07-19
DAL2654 Delta Air Lines 13 2026-07-20
DAL2188 Delta Air Lines 13 2026-07-26
DAL1587 Delta Air Lines 13 2026-07-24
DAL1214 Delta Air Lines 12 2026-05-04
DAL1005 Delta Air Lines 12 2026-07-26
DAL2960 Delta Air Lines 10 2026-06-06
DAL2059 Delta Air Lines 10 2026-07-19
DAL1134 Delta Air Lines 10 2026-07-18
DAL544 Delta Air Lines 9 2026-07-20
DAL178 Delta Air Lines 9 2026-07-26
DAL1497 Delta Air Lines 9 2026-05-05
DAL1346 Delta Air Lines 9 2026-06-06
DAL927 - 7 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1005 ATL → DTW Jul 26, 21:05 UTCJul 26, 22:40 UTC1h 35m
2026-07-26 DAL2188 DTW → ATL Jul 26, 17:30 UTCJul 26, 18:50 UTC1h 20m
2026-07-26 DAL179 AMS → PDX Jul 26, 09:25 UTCJul 26, 15:10 UTC5h 45m
2026-07-26 DAL179 AMS → PDX Jul 26, 09:21 UTCJul 26, 15:06 UTC5h 45m
2026-07-26 DAL178 PDX → AMS Jul 26, 02:10 UTCJul 26, 02:45 UTC35m
2026-07-26 DAL178 PDX → AMS Jul 26, 02:07 UTCJul 26, 07:25 UTC5h 18m
2026-07-25 DAL2171 FLL → CVG Jul 25, 19:10 UTCJul 25, 22:35 UTC3h 25m
2026-07-25 DAL2171 FLL → CVG Jul 25, 13:10 UTCJul 25, 17:30 UTC4h 20m
2026-07-25 DAL651 DTW → PHL Jul 25, 02:05 UTCJul 25, 03:30 UTC1h 25m
2026-07-24 DAL759 SFO → ATL Jul 24, 23:25 UTCJul 25, 00:30 UTC1h 5m
2026-07-24 DAL759 SFO → ATL Jul 24, 19:55 UTCJul 24, 20:50 UTC55m
2026-07-24 DAL1587 JFK → PBI Jul 24, 16:45 UTCJul 24, 17:45 UTC1h 0m
2026-07-24 DAL1587 JFK → PBI Jul 24, 14:25 UTCJul 24, 15:30 UTC1h 5m
2026-07-24 DAL3132 MSY → ATL Jul 24, 00:20 UTCJul 24, 01:25 UTC1h 5m
2026-07-23 DAL3132 MSY → ATL Jul 23, 22:00 UTCJul 23, 23:05 UTC1h 5m
2026-07-23 DAL1048 ATL → CHA Jul 23, 18:30 UTCJul 23, 20:15 UTC1h 45m
2026-07-23 DAL261 RDU → CUN Jul 23, 09:50 UTCJul 23, 16:20 UTC6h 30m
2026-07-23 DAL178 PDX → AMS Jul 23, 02:15 UTCJul 23, 07:25 UTC5h 10m
2026-07-23 DAL178 PDX → AMS Jul 23, 02:13 UTCJul 23, 07:20 UTC5h 7m
2026-07-22 DAL2171 FLL → CVG Jul 22, 19:10 UTCJul 22, 22:40 UTC3h 30m
2026-07-22 DAL2171 FLL → CVG Jul 22, 13:15 UTCJul 22, 17:45 UTC4h 30m
2026-07-21 DAL179 AMS → PDX Jul 21, 10:55 UTCJul 21, 11:10 UTC15m
2026-07-21 DAL179 AMS → PDX Jul 21, 10:51 UTCJul 21, 16:59 UTC6h 8m
2026-07-21 DAL260 CUN → RDU Jul 21, 01:45 UTCJul 21, 07:20 UTC5h 35m
2026-07-20 DAL2654 BOS → RDU Jul 20, 21:10 UTCJul 20, 23:15 UTC2h 5m
2026-07-20 DAL2654 BOS → RDU Jul 20, 21:08 UTCJul 20, 23:18 UTC2h 10m
2026-07-20 DAL927 - Jul 20, 15:50 UTCJul 20, 19:30 UTC3h 40m
2026-07-20 DAL544 ATL → LGA Jul 20, 01:05 UTCJul 20, 04:30 UTC3h 25m
2026-07-19 DAL1747 DTW → MCO Jul 19, 18:45 UTCJul 19, 20:55 UTC2h 10m
2026-07-19 DAL1747 DTW → MCO Jul 19, 14:50 UTCJul 19, 16:55 UTC2h 5m
2026-07-19 DAL2059 IAH → LGA Jul 19, 07:40 UTCJul 19, 13:15 UTC5h 35m
2026-07-19 DAL2059 IAH → LGA Jul 19, 07:36 UTCJul 19, 13:14 UTC5h 38m
2026-07-18 DAL1134 BOS → JFK Jul 18, 22:50 UTCJul 19, 05:20 UTC6h 30m
2026-07-18 DAL1134 BOS → JFK Jul 18, 22:46 UTCJul 19, 05:14 UTC6h 28m
2026-07-18 DAL1747 DTW → MCO Jul 18, 19:05 UTCJul 18, 21:25 UTC2h 20m
2026-07-18 DAL1747 DTW → MCO Jul 18, 19:03 UTCJul 18, 21:18 UTC2h 15m
2026-07-18 DAL1747 DTW → MCO Jul 18, 15:10 UTCJul 18, 17:15 UTC2h 5m
2026-07-17 DAL1005 ATL → DTW Jul 17, 21:44 UTCJul 17, 23:25 UTC1h 40m
2026-07-17 DAL1587 - Jul 17, 17:09 UTCJul 17, 18:19 UTC1h 10m
2026-07-17 DAL1587 - Jul 17, 14:50 UTCJul 17, 15:44 UTC55m
2026-07-16 DAL1048 - Jul 16, 20:55 UTCJul 16, 22:55 UTC2h 0m
2026-07-16 DAL261 - Jul 16, 12:49 UTCJul 16, 13:15 UTC25m
2026-07-16 DAL261 KEF → MSP Jul 16, 12:48 UTCJul 16, 18:47 UTC5h 59m
2026-07-16 DAL261 KEF → MSP Jul 16, 12:48 UTCJul 16, 18:50 UTC6h 2m
2026-07-16 DAL178 - Jul 16, 05:35 UTCJul 16, 10:59 UTC5h 25m
2026-07-16 DAL651 ATL → DTW Jul 16, 02:15 UTCJul 16, 03:40 UTC1h 25m
2026-07-15 DAL1048 - Jul 15, 18:00 UTCJul 15, 20:00 UTC2h 0m
2026-07-15 DAL261 - Jul 15, 09:45 UTCJul 15, 15:45 UTC6h 0m
2026-07-15 DAL178 DTW → KEF Jul 15, 02:10 UTCJul 15, 07:35 UTC5h 25m
2026-07-15 DAL178 DTW → KEF Jul 15, 02:09 UTCJul 15, 07:38 UTC5h 29m

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 N821DX page for operator, model, and routing details .

Mode-S AB34F3 frequently asked

What is Mode-S code AB34F3?
AB34F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821DX.
Where is Mode-S AB34F3 registered?
Mode-S code AB34F3 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 AB34F3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB34F3, octal 52632363, decimal 11,220,211.
What flights does AB34F3 operate?
Mode-S AB34F3 has broadcast 20 distinct callsigns, including DAL1048, DAL261, DAL260, DAL2171, DAL664.