Apparatus

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sensors Mode-S transponder

AB3C61

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N823DX · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
AB3C61
Octal
52636141
Decimal
11,222,113
Country
US
Tail
N823DX
Type
B752
Broadcasting now · callsign DAL927 · 39,000 ft
Flights observed
523
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:05 UTC

Current position

AB3C61 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB3C61 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
DAL2990 Delta Air Lines 27 2026-06-05
DAL2188 Delta Air Lines 22 2026-07-22
DAL260 Delta Air Lines 20 2026-07-23
DAL1048 - 20 2026-07-13
DAL2856 Delta Air Lines 17 2026-06-05
DAL3024 Delta Air Lines 16 2026-06-06
DAL2654 Delta Air Lines 16 2026-07-22
DAL1658 Delta Air Lines 13 2026-04-29
DAL1646 - 13 2026-06-17
DAL1379 Delta Air Lines 13 2026-04-29
DAL1348 Delta Air Lines 13 2026-05-05
DAL1587 Delta Air Lines 12 2026-07-26
DAL1134 - 12 2026-06-28
DAL2627 Delta Air Lines 11 2026-05-03
DAL261 - 11 2026-07-13
DAL1747 Delta Air Lines 11 2026-06-17
DAL759 Delta Air Lines 10 2026-07-26
DAL744 Delta Air Lines 10 2026-05-10
DAL2059 - 10 2026-06-28
DAL1457 Delta Air Lines 10 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL759 SFO → ATL Jul 26, 20:00 UTCJul 26, 21:05 UTC1h 5m
2026-07-26 DAL1587 JFK → PBI Jul 26, 16:50 UTCJul 26, 17:55 UTC1h 5m
2026-07-26 DAL1587 JFK → PBI Jul 26, 14:30 UTCJul 26, 15:35 UTC1h 5m
2026-07-26 DAL2080 MCO → LGA Jul 26, 11:35 UTCJul 26, 12:25 UTC50m
2026-07-26 DAL2080 MCO → LGA Jul 26, 11:25 UTCJul 26, 11:30 UTC5m
2026-07-26 DAL2080 MCO → LGA Jul 26, 11:22 UTCJul 26, 12:24 UTC1h 2m
2026-07-26 DAL2035 ATL → FSD Jul 26, 01:45 UTCJul 26, 02:45 UTC1h 0m
2026-07-25 DAL2755 JFK → TPA Jul 25, 16:30 UTCJul 25, 17:40 UTC1h 10m
2026-07-25 DAL2755 JFK → TPA Jul 25, 12:55 UTCJul 25, 14:05 UTC1h 10m
2026-07-24 DAL9961 VQQ → ATL Jul 24, 20:00 UTCJul 25, 02:40 UTC6h 40m
2026-07-23 DAL260 CUN → RDU Jul 23, 01:40 UTCJul 23, 07:10 UTC5h 30m
2026-07-22 DAL2654 BOS → RDU Jul 22, 21:15 UTCJul 22, 23:30 UTC2h 15m
2026-07-22 DAL2654 BOS → RDU Jul 22, 21:14 UTCJul 22, 23:24 UTC2h 10m
2026-07-22 DAL2188 DTW → ATL Jul 22, 17:10 UTCJul 22, 18:45 UTC1h 35m
2026-07-22 DAL2188 DTW → ATL Jul 22, 17:07 UTCJul 22, 18:38 UTC1h 31m
2026-07-22 DAL179 AMS → PDX Jul 22, 08:59 UTCJul 22, 15:02 UTC6h 3m
2026-07-22 DAL260 CUN → RDU Jul 22, 01:10 UTCJul 22, 02:35 UTC1h 25m
2026-07-21 DAL2654 BOS → RDU Jul 21, 21:00 UTCJul 21, 23:10 UTC2h 10m
2026-07-21 DAL927 - Jul 21, 15:45 UTCJul 21, 19:15 UTC3h 30m
2026-07-20 DAL544 ATL → LGA Jul 20, 23:50 UTCJul 21, 03:30 UTC3h 40m
2026-07-20 DAL1005 ATL → DTW Jul 20, 20:20 UTCJul 20, 21:55 UTC1h 35m
2026-07-20 DAL1005 ATL → DTW Jul 20, 20:20 UTCJul 20, 21:49 UTC1h 29m
2026-07-20 DAL1587 JFK → PBI Jul 20, 17:25 UTCJul 20, 18:30 UTC1h 5m
2026-07-20 DAL1587 JFK → PBI Jul 20, 17:25 UTCJul 20, 18:29 UTC1h 4m
2026-07-20 DAL1587 JFK → PBI Jul 20, 14:25 UTCJul 20, 15:35 UTC1h 10m
2026-07-20 DAL759 SFO → ATL Jul 20, 00:55 UTCJul 20, 01:55 UTC1h 0m
2026-07-19 DAL759 SFO → ATL Jul 19, 22:15 UTCJul 19, 23:20 UTC1h 5m
2026-07-19 DAL2188 DTW → ATL Jul 19, 19:10 UTCJul 19, 20:35 UTC1h 25m
2026-07-19 DAL179 AMS → PDX Jul 19, 09:40 UTCJul 19, 15:35 UTC5h 55m
2026-07-19 DAL260 MSP → KEF Jul 19, 01:35 UTCJul 19, 07:15 UTC5h 40m
2026-07-18 DAL2654 BOS → RDU Jul 18, 21:25 UTCJul 18, 23:20 UTC1h 55m
2026-07-18 DAL759 SFO → ATL Jul 18, 14:50 UTCJul 18, 15:50 UTC1h 0m
2026-07-18 DAL759 SFO → ATL Jul 18, 14:50 UTCJul 18, 15:52 UTC1h 2m
2026-07-17 DAL759 ATL → TPA Jul 17, 21:50 UTCJul 17, 23:14 UTC1h 25m
2026-07-17 DAL2188 DTW → ATL Jul 17, 17:55 UTCJul 17, 19:35 UTC1h 40m
2026-07-17 DAL179 AMS → PDX Jul 17, 10:30 UTCJul 17, 10:55 UTC25m
2026-07-17 DAL179 AMS → PDX Jul 17, 10:29 UTCJul 17, 16:14 UTC5h 45m
2026-07-17 DAL260 - Jul 17, 08:15 UTCJul 17, 08:35 UTC20m
2026-07-17 DAL260 - Jul 17, 02:59 UTCJul 17, 03:55 UTC55m
2026-07-16 DAL2654 BOS → RDU Jul 16, 22:35 UTCJul 17, 00:40 UTC2h 5m
2026-07-16 DAL927 LAS → ATL Jul 16, 16:25 UTCJul 16, 20:15 UTC3h 50m
2026-07-15 DAL544 - Jul 15, 23:30 UTCJul 16, 03:00 UTC3h 30m
2026-07-15 DAL651 ATL → DTW Jul 15, 02:05 UTCJul 15, 03:35 UTC1h 30m
2026-07-14 DAL406 ATL → ATL Jul 14, 15:20 UTCJul 15, 00:20 UTC8h 59m
2026-07-14 DAL3132 MSY → ATL Jul 14, 00:35 UTCJul 14, 01:35 UTC1h 0m
2026-07-13 DAL3132 ATL → MSY Jul 13, 22:05 UTCJul 13, 23:15 UTC1h 10m
2026-07-13 DAL1048 MSP → ATL Jul 13, 18:30 UTCJul 13, 20:35 UTC2h 5m
2026-07-13 DAL261 - Jul 13, 10:40 UTCJul 13, 16:45 UTC6h 5m
2026-07-13 DAL178 - Jul 13, 02:25 UTCJul 13, 08:05 UTC5h 40m
2026-07-12 DAL2171 - Jul 12, 19:05 UTCJul 12, 22:15 UTC3h 10m

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 N823DX page for operator, model, and routing details .

Mode-S AB3C61 frequently asked

What is Mode-S code AB3C61?
AB3C61 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N823DX.
Where is Mode-S AB3C61 registered?
Mode-S code AB3C61 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 AB3C61 broadcasting right now?
Yes. Mode-S AB3C61 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3C61, octal 52636141, decimal 11,222,113.
What flights does AB3C61 operate?
Mode-S AB3C61 has broadcast 20 distinct callsigns, including DAL2990, DAL2188, DAL260, DAL1048, DAL2856.