Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADD2B5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N990AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ADD2B5
Octal
53351265
Decimal
11,391,669
Country
US
Tail
N990AT
Type
B712
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
727
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S ADD2B5.

Country allocation

The ICAO 24-bit address ADD2B5 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
DAL1704 - 10 2026-06-24
DAL3078 Delta Air Lines 9 2026-07-25
DAL2837 Delta Air Lines 9 2026-07-24
DAL3052 - 8 2026-07-22
DAL2490 Delta Air Lines 8 2026-06-28
DAL2211 Delta Air Lines 8 2026-05-31
DAL2086 - 8 2026-07-03
DAL1093 - 8 2026-06-19
DAL3048 Delta Air Lines 7 2026-05-05
DAL1868 Delta Air Lines 7 2026-07-18
DAL1700 Delta Air Lines 7 2026-07-24
DAL1325 Delta Air Lines 7 2026-05-22
DAL940 - 6 2026-06-29
DAL3117 Delta Air Lines 6 2026-07-24
DAL3064 - 6 2026-07-07
DAL3045 Delta Air Lines 6 2026-05-22
DAL3033 Delta Air Lines 6 2026-04-27
DAL3012 Delta Air Lines 6 2026-06-03
DAL2868 - 6 2026-07-11
DAL2754 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3088 ATL → DAY Jul 26, 20:40 UTCJul 26, 21:15 UTC35m
2026-07-26 DAL2179 SFO → SLC Jul 26, 18:40 UTCJul 26, 19:25 UTC45m
2026-07-26 DAL2179 SFO → SLC Jul 26, 16:40 UTCJul 26, 17:30 UTC50m
2026-07-26 DAL1149 DTW → PBI Jul 26, 14:30 UTCJul 26, 15:25 UTC55m
2026-07-26 DAL2939 MEM → ATL Jul 26, 00:55 UTCJul 26, 01:25 UTC30m
2026-07-25 DAL2939 MEM → ATL Jul 25, 22:10 UTCJul 26, 00:00 UTC1h 50m
2026-07-25 DAL3078 ATL → LEX Jul 25, 19:40 UTCJul 25, 20:40 UTC1h 0m
2026-07-25 DAL3078 ATL → LEX Jul 25, 17:40 UTCJul 25, 18:25 UTC45m
2026-07-25 DAL1374 PBI → MSP Jul 25, 15:20 UTCJul 25, 16:15 UTC55m
2026-07-25 DAL1374 PBI → MSP Jul 25, 13:20 UTCJul 25, 14:15 UTC55m
2026-07-25 DAL3181 GNV → ATL Jul 25, 11:05 UTCJul 25, 11:55 UTC50m
2026-07-25 DAL3079 ATL → GNV Jul 25, 02:10 UTCJul 25, 03:00 UTC50m
2026-07-25 DAL3079 ATL → GNV Jul 25, 02:09 UTCJul 25, 02:57 UTC48m
2026-07-24 DAL1700 BOS → DTW Jul 24, 22:30 UTCJul 24, 23:40 UTC1h 10m
2026-07-24 DAL1700 BOS → DTW Jul 24, 20:00 UTCJul 24, 20:55 UTC55m
2026-07-24 DAL2681 - Jul 24, 18:05 UTCJul 24, 18:15 UTC10m
2026-07-24 DAL2681 - Jul 24, 16:05 UTCJul 24, 18:15 UTC2h 10m
2026-07-24 DAL2681 MSN → ATL Jul 24, 16:02 UTCJul 24, 17:47 UTC1h 45m
2026-07-24 DAL2681 ATL → MSN Jul 24, 13:35 UTCJul 24, 15:10 UTC1h 35m
2026-07-24 DAL3041 JAN → ATL Jul 24, 10:55 UTCJul 24, 11:40 UTC45m
2026-07-24 DAL3117 ATL → JAN Jul 24, 03:00 UTCJul 24, 03:40 UTC40m
2026-07-24 DAL3117 ATL → JAN Jul 24, 02:56 UTCJul 24, 03:47 UTC51m
2026-07-24 DAL2837 SLC → JAC Jul 24, 01:40 UTCJul 24, 01:45 UTC5m
2026-07-23 DAL2837 SLC → JAC Jul 23, 23:55 UTCJul 24, 01:45 UTC1h 50m
2026-07-23 DAL2837 SLC → JAC Jul 23, 23:53 UTCJul 24, 01:25 UTC1h 32m
2026-07-23 DAL2837 SLC → JAC Jul 23, 21:25 UTCJul 23, 22:55 UTC1h 30m
2026-07-23 DAL3127 MLB → ATL Jul 23, 19:05 UTCJul 23, 20:10 UTC1h 5m
2026-07-23 DAL3127 MLB → ATL Jul 23, 16:55 UTCJul 23, 18:00 UTC1h 5m
2026-07-23 DAL1708 - Jul 23, 14:55 UTCJul 23, 15:30 UTC35m
2026-07-23 DAL1708 ATL → HSV Jul 23, 13:30 UTCJul 23, 13:55 UTC25m
2026-07-22 DAL3027 ATL → LIT Jul 22, 21:10 UTCJul 22, 22:10 UTC1h 0m
2026-07-22 DAL3027 ATL → LIT Jul 22, 18:50 UTCJul 22, 19:50 UTC1h 0m
2026-07-22 DAL3052 - Jul 22, 16:35 UTCJul 22, 17:15 UTC40m
2026-07-22 DAL3052 GSO → ATL Jul 22, 16:29 UTCJul 22, 17:22 UTC53m
2026-07-22 DAL3052 - Jul 22, 14:30 UTCJul 22, 15:20 UTC50m
2026-07-22 DAL2116 TPA → LGA Jul 22, 12:20 UTCJul 22, 13:00 UTC40m
2026-07-21 DAL2241 - Jul 21, 23:20 UTCJul 22, 00:00 UTC40m
2026-07-21 DAL2467 - Jul 21, 20:20 UTCJul 21, 21:10 UTC50m
2026-07-21 DAL2467 MYR → ATL Jul 21, 20:12 UTCJul 21, 21:06 UTC54m
2026-07-21 DAL2467 - Jul 21, 18:25 UTCJul 21, 19:00 UTC35m
2026-07-21 DAL573 - Jul 21, 16:05 UTCJul 21, 16:40 UTC35m
2026-07-21 DAL573 - Jul 21, 14:20 UTCJul 21, 14:55 UTC35m
2026-07-21 DAL1721 - Jul 21, 11:10 UTCJul 21, 11:55 UTC45m
2026-07-21 DAL2029 - Jul 21, 03:15 UTCJul 21, 04:00 UTC45m
2026-07-20 DAL2364 - Jul 20, 23:40 UTCJul 21, 01:25 UTC1h 45m
2026-07-20 DAL2364 ATL → OMA Jul 20, 20:35 UTCJul 20, 22:25 UTC1h 50m
2026-07-20 DAL2044 - Jul 20, 17:15 UTCJul 20, 18:55 UTC1h 40m
2026-07-20 DAL2044 HPN → ATL Jul 20, 17:13 UTCJul 20, 18:52 UTC1h 39m
2026-07-20 DAL2044 ATL → HPN Jul 20, 14:00 UTCJul 20, 15:55 UTC1h 55m
2026-07-20 DAL3155 AUS → DTW Jul 20, 11:50 UTCJul 20, 12:50 UTC1h 0m

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 N990AT page for operator, model, and routing details .

Mode-S ADD2B5 frequently asked

What is Mode-S code ADD2B5?
ADD2B5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N990AT.
Where is Mode-S ADD2B5 registered?
Mode-S code ADD2B5 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 ADD2B5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADD2B5, octal 53351265, decimal 11,391,669.
What flights does ADD2B5 operate?
Mode-S ADD2B5 has broadcast 20 distinct callsigns, including DAL1704, DAL3078, DAL2837, DAL3052, DAL2490.