Apparatus

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sensors Mode-S transponder

AB6B45

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N835DN · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
AB6B45
Octal
52665505
Decimal
11,234,117
Country
US
Tail
N835DN
Type
B739
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S AB6B45.

Country allocation

The ICAO 24-bit address AB6B45 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
DAL1421 Delta Air Lines 10 2026-05-26
DAL1879 - 7 2026-07-13
DAL937 Delta Air Lines 5 2026-06-13
DAL809 - 5 2026-07-11
DAL689 Delta Air Lines 5 2026-05-21
DAL2894 Delta Air Lines 5 2026-05-30
DAL2650 Delta Air Lines 5 2026-05-05
DAL1861 - 5 2026-07-13
DAL1178 Delta Air Lines 5 2026-07-05
DAL904 Delta Air Lines 4 2026-07-03
DAL662 - 4 2026-07-01
DAL567 Delta Air Lines 4 2026-05-27
DAL2289 - 4 2026-07-09
DAL2022 Delta Air Lines 4 2026-07-23
DAL1820 Delta Air Lines 4 2026-06-12
DAL1715 Delta Air Lines 4 2026-05-26
DAL1173 - 4 2026-06-25
DAL1004 - 4 2026-06-18
DAL878 - 3 2026-07-21
DAL728 - 3 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1194 DTW → EWR Jul 26, 18:55 UTCJul 26, 20:15 UTC1h 20m
2026-07-26 DAL1095 LAX → JFK Jul 26, 16:00 UTCJul 26, 17:25 UTC1h 25m
2026-07-26 DAL2906 LAX → SLC Jul 26, 12:55 UTCJul 26, 14:15 UTC1h 20m
2026-07-26 DAL986 ATL → SYR Jul 26, 00:20 UTCJul 26, 02:50 UTC2h 30m
2026-07-25 DAL986 ATL → SYR Jul 25, 18:35 UTCJul 25, 21:10 UTC2h 35m
2026-07-25 DAL769 ATL → SFO Jul 25, 00:40 UTCJul 25, 04:30 UTC3h 50m
2026-07-25 DAL769 ATL → SFO Jul 25, 00:38 UTCJul 25, 04:19 UTC3h 41m
2026-07-24 DAL2205 MCO → ATL Jul 24, 20:00 UTCJul 24, 22:50 UTC2h 50m
2026-07-24 DAL1203 LAX → SFO Jul 24, 16:55 UTCJul 24, 18:20 UTC1h 25m
2026-07-24 DAL1203 LAX → SFO Jul 24, 13:55 UTCJul 24, 15:20 UTC1h 25m
2026-07-23 DAL2022 SDF → ATL Jul 23, 23:50 UTCJul 24, 04:05 UTC4h 15m
2026-07-23 DAL2022 SDF → ATL Jul 23, 18:20 UTCJul 23, 21:55 UTC3h 35m
2026-07-23 DAL2023 ATL → PVD Jul 23, 11:50 UTCJul 23, 16:20 UTC4h 30m
2026-07-23 DAL2703 MSY → LGA Jul 23, 02:20 UTCJul 23, 04:10 UTC1h 50m
2026-07-22 DAL2981 TPA → BOS Jul 22, 22:35 UTCJul 23, 00:45 UTC2h 10m
2026-07-22 DAL600 ATL → ATL Jul 22, 14:25 UTCJul 22, 20:15 UTC5h 50m
2026-07-22 DAL2933 - Jul 22, 11:10 UTCJul 22, 12:35 UTC1h 25m
2026-07-22 DAL2504 RDU → LGA Jul 22, 00:15 UTCJul 22, 02:30 UTC2h 15m
2026-07-21 DAL1196 RSW → ATL Jul 21, 20:05 UTCJul 21, 21:20 UTC1h 15m
2026-07-21 DAL1196 RSW → ATL Jul 21, 17:20 UTCJul 21, 18:40 UTC1h 20m
2026-07-21 DAL1500 - Jul 21, 14:30 UTCJul 21, 15:55 UTC1h 25m
2026-07-21 DAL1500 ATL → CLE Jul 21, 11:50 UTCJul 21, 13:15 UTC1h 25m
2026-07-21 DAL878 - Jul 21, 05:25 UTCJul 21, 09:15 UTC3h 50m
2026-07-21 DAL878 SMF → ATL Jul 21, 05:24 UTCJul 21, 09:39 UTC4h 15m
2026-07-21 DAL574 BOS → ATL Jul 21, 00:00 UTCJul 21, 03:20 UTC3h 20m
2026-07-20 DAL2696 - Jul 20, 19:35 UTCJul 20, 22:45 UTC3h 10m
2026-07-20 DAL2696 TPA → MSP Jul 20, 19:34 UTCJul 20, 22:36 UTC3h 2m
2026-07-20 DAL2696 MSP → TPA Jul 20, 15:25 UTCJul 20, 18:20 UTC2h 55m
2026-07-20 DAL1129 JFK → DFW Jul 20, 12:15 UTCJul 20, 13:45 UTC1h 30m
2026-07-20 DAL2931 MSP → DEN Jul 20, 00:00 UTCJul 20, 01:35 UTC1h 35m
2026-07-19 DAL2483 SJC → SLC Jul 19, 19:20 UTCJul 19, 21:55 UTC2h 35m
2026-07-19 DAL2483 SJC → SLC Jul 19, 19:17 UTCJul 19, 22:04 UTC2h 47m
2026-07-19 DAL2482 BOS → CVG Jul 19, 14:20 UTCJul 19, 17:55 UTC3h 35m
2026-07-19 DAL2482 BOS → CVG Jul 19, 14:20 UTCJul 19, 17:53 UTC3h 33m
2026-07-19 DAL2757 IND → MSP Jul 19, 11:05 UTCJul 19, 12:25 UTC1h 20m
2026-07-19 DAL674 MSP → IND Jul 19, 01:10 UTCJul 19, 02:15 UTC1h 5m
2026-07-18 DAL1701 ORD → ATL Jul 18, 20:30 UTCJul 18, 23:30 UTC3h 0m
2026-07-18 DAL1701 ORD → ATL Jul 18, 15:35 UTCJul 18, 18:50 UTC3h 15m
2026-07-18 DAL1129 JFK → DFW Jul 18, 12:15 UTCJul 18, 13:45 UTC1h 30m
2026-07-18 DAL2931 MSP → DEN Jul 18, 00:45 UTCJul 18, 02:09 UTC1h 25m
2026-07-17 DAL2462 - Jul 17, 21:10 UTCJul 17, 23:20 UTC2h 10m
2026-07-17 DAL2462 - Jul 17, 15:55 UTCJul 17, 18:10 UTC2h 15m
2026-07-17 DAL1056 - Jul 17, 10:50 UTCJul 17, 13:55 UTC3h 5m
2026-07-17 DAL1428 JFK → MIA Jul 17, 00:40 UTCJul 17, 03:08 UTC2h 28m
2026-07-17 DAL1428 - Jul 17, 00:40 UTCJul 17, 03:14 UTC2h 35m
2026-07-16 DAL532 DEN → JFK Jul 16, 18:25 UTCJul 16, 21:45 UTC3h 20m
2026-07-16 DAL532 JFK → DEN Jul 16, 13:05 UTCJul 16, 16:30 UTC3h 25m
2026-07-16 DAL1419 - Jul 16, 02:05 UTCJul 16, 04:25 UTC2h 20m
2026-07-15 DAL1419 JFK → FLL Jul 15, 20:05 UTCJul 15, 22:20 UTC2h 15m
2026-07-15 DAL1422 - Jul 15, 15:30 UTCJul 15, 17:55 UTC2h 25m

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 N835DN page for operator, model, and routing details .

Mode-S AB6B45 frequently asked

What is Mode-S code AB6B45?
AB6B45 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N835DN.
Where is Mode-S AB6B45 registered?
Mode-S code AB6B45 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 AB6B45 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 AB6B45, octal 52665505, decimal 11,234,117.
What flights does AB6B45 operate?
Mode-S AB6B45 has broadcast 20 distinct callsigns, including DAL1421, DAL1879, DAL937, DAL809, DAL689.