Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A01B56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N106DN · AIRBUS A-321 · operated by UMB BANK NA TRUSTEE

Hex
A01B56
Octal
50015526
Decimal
10,492,758
Country
US
Tail
N106DN
Type
A321
No current signal · last broadcast 19d ago
Flights observed
396
Distinct callsigns
20
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A01B56.

Country allocation

The ICAO 24-bit address A01B56 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
DAL1181 Delta Air Lines 13 2026-06-10
DAL2465 - 8 2026-06-17
DAL995 Delta Air Lines 7 2026-06-19
DAL969 Delta Air Lines 7 2026-06-06
DAL727 Delta Air Lines 6 2026-05-19
DAL2877 - 6 2026-06-19
DAL2191 - 6 2026-06-14
DAL431 - 5 2026-06-20
DAL2976 Delta Air Lines 5 2026-05-26
DAL2520 - 5 2026-06-18
DAL2133 Delta Air Lines 5 2026-05-27
DAL1803 Delta Air Lines 5 2026-06-18
DAL968 Delta Air Lines 4 2026-05-19
DAL896 - 4 2026-06-21
DAL783 Delta Air Lines 4 2026-05-23
DAL706 Delta Air Lines 4 2026-06-23
DAL493 Delta Air Lines 4 2026-05-22
DAL460 Delta Air Lines 4 2026-05-21
DAL433 Delta Air Lines 4 2026-05-08
DAL2634 Delta Air Lines 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 DAL9937 - Jun 24, 12:30 UTCJun 24, 15:14 UTC2h 45m
2026-06-24 DAL9937 ATL → SAL Jun 24, 12:26 UTCJun 24, 15:29 UTC3h 3m
2026-06-23 DAL706 SAN → DTW Jun 23, 20:19 UTCJun 23, 22:49 UTC2h 30m
2026-06-23 DAL706 SAN → DTW Jun 23, 16:09 UTCJun 23, 18:55 UTC2h 45m
2026-06-23 DAL364 LGA → ATL Jun 23, 12:49 UTCJun 23, 14:39 UTC1h 50m
2026-06-23 DAL468 ATL → LGA Jun 23, 00:19 UTCJun 23, 03:04 UTC2h 45m
2026-06-22 DAL2990 - Jun 22, 21:25 UTCJun 22, 22:15 UTC50m
2026-06-22 DAL2990 ATL → JAX Jun 22, 18:19 UTCJun 22, 19:09 UTC50m
2026-06-22 DAL2836 - Jun 22, 15:05 UTCJun 22, 16:29 UTC1h 25m
2026-06-22 DAL2836 MIA → ATL Jun 22, 15:04 UTCJun 22, 16:26 UTC1h 22m
2026-06-22 DAL2836 ATL → MIA Jun 22, 11:54 UTCJun 22, 13:19 UTC1h 25m
2026-06-22 DAL819 - Jun 22, 06:00 UTCJun 22, 09:45 UTC3h 45m
2026-06-21 DAL680 UIO → ATL Jun 21, 22:44 UTCJun 22, 02:59 UTC4h 15m
2026-06-21 DAL1983 ATL → BZE Jun 21, 19:20 UTCJun 21, 20:45 UTC1h 25m
2026-06-21 DAL754 - Jun 21, 13:54 UTCJun 21, 17:29 UTC3h 35m
2026-06-21 DAL896 ATL → SAN Jun 21, 01:55 UTCJun 21, 05:59 UTC4h 5m
2026-06-20 DAL1101 ORF → ATL Jun 20, 21:10 UTCJun 20, 22:30 UTC1h 20m
2026-06-20 DAL1101 ATL → ORF Jun 20, 18:14 UTCJun 20, 19:29 UTC1h 15m
2026-06-20 DAL431 DEN → ATL Jun 20, 13:24 UTCJun 20, 15:44 UTC2h 20m
2026-06-20 DAL1705 MSP → DEN Jun 20, 03:39 UTCJun 20, 05:24 UTC1h 45m
2026-06-20 DAL1705 MSP → DEN Jun 20, 03:40 UTCJun 20, 05:27 UTC1h 47m
2026-06-20 DAL1303 - Jun 20, 00:14 UTCJun 20, 02:14 UTC2h 0m
2026-06-19 DAL1476 MSP → DTW Jun 19, 21:44 UTCJun 19, 22:55 UTC1h 10m
2026-06-19 DAL2877 DEN → MSP Jun 19, 18:39 UTCJun 19, 20:19 UTC1h 40m
2026-06-19 DAL2877 DEN → MSP Jun 19, 18:35 UTCJun 19, 20:14 UTC1h 39m
2026-06-19 DAL995 BOS → DFW Jun 19, 14:04 UTCJun 19, 16:59 UTC2h 55m
2026-06-19 DAL995 BOS → DFW Jun 19, 14:01 UTCJun 19, 16:50 UTC2h 49m
2026-06-19 DAL1221 - Jun 19, 10:50 UTCJun 19, 12:25 UTC1h 35m
2026-06-19 DAL2388 SEA → LAS Jun 19, 01:50 UTCJun 19, 03:20 UTC1h 30m
2026-06-18 DAL1803 SDQ → ATL Jun 18, 19:38 UTCJun 18, 22:56 UTC3h 18m
2026-06-18 DAL1803 SDQ → ATL Jun 18, 15:05 UTCJun 18, 22:50 UTC7h 45m
2026-06-18 DAL550 LGA → ATL Jun 18, 10:25 UTCJun 18, 12:20 UTC1h 55m
2026-06-18 DAL2520 MCO → LGA Jun 18, 00:35 UTCJun 18, 02:55 UTC2h 20m
2026-06-17 DAL2520 LGA → MCO Jun 17, 19:56 UTCJun 17, 22:11 UTC2h 15m
2026-06-17 DAL2520 LGA → MCO Jun 17, 19:55 UTCJun 17, 22:20 UTC2h 25m
2026-06-17 DAL2465 - Jun 17, 15:46 UTCJun 17, 18:05 UTC2h 20m
2026-06-17 DAL2465 FLL → LGA Jun 17, 15:43 UTCJun 17, 18:01 UTC2h 18m
2026-06-17 DAL2465 LGA → FLL Jun 17, 11:35 UTCJun 17, 14:10 UTC2h 35m
2026-06-16 DAL434 ATL → LGA Jun 16, 22:35 UTCJun 17, 00:15 UTC1h 40m
2026-06-16 DAL322 BOS → ATL Jun 16, 18:05 UTCJun 16, 20:20 UTC2h 16m
2026-06-16 DAL855 ATL → BNH Jun 16, 14:15 UTCJun 16, 16:10 UTC1h 55m
2026-06-16 DAL855 ATL → BOS Jun 16, 14:12 UTCJun 16, 16:11 UTC1h 59m
2026-06-16 DAL1402 - Jun 16, 11:10 UTCJun 16, 12:30 UTC1h 20m
2026-06-16 DAL1426 JFK → DFW Jun 16, 00:20 UTCJun 16, 01:25 UTC1h 5m
2026-06-16 DAL1426 JFK → DFW Jun 16, 00:20 UTCJun 16, 01:24 UTC1h 4m
2026-06-15 DAL2720 JAX → ATL Jun 15, 22:05 UTCJun 15, 22:54 UTC50m
2026-06-15 DAL2720 - Jun 15, 19:55 UTCJun 15, 20:50 UTC55m
2026-06-15 DAL1046 LAX → SEA Jun 15, 16:35 UTCJun 15, 18:25 UTC1h 50m
2026-06-15 DAL1046 LAX → SEA Jun 15, 16:34 UTCJun 15, 18:25 UTC1h 51m
2026-06-15 DAL2254 BNA → BOS Jun 15, 12:30 UTCJun 15, 14:05 UTC1h 35m

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 N106DN page for operator, model, and routing details .

Mode-S A01B56 frequently asked

What is Mode-S code A01B56?
A01B56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N106DN.
Where is Mode-S A01B56 registered?
Mode-S code A01B56 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 A01B56 broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A01B56, octal 50015526, decimal 10,492,758.
What flights does A01B56 operate?
Mode-S A01B56 has broadcast 20 distinct callsigns, including DAL1181, DAL2465, DAL995, DAL969, DAL727.