Apparatus

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sensors Mode-S transponder

A99B83

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N718TW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A99B83
Octal
52315603
Decimal
11,115,395
Country
US
Tail
N718TW
Type
B752
Broadcasting now · callsign DAL987 · 29,000 ft
Flights observed
332
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A99B83 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A99B83 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
DAL786 Delta Air Lines 35 2026-05-01
DAL730 Delta Air Lines 29 2026-04-30
DAL392 - 19 2026-06-25
DAL1857 - 18 2026-07-12
DAL2012 - 11 2026-07-13
DAL987 - 10 2026-06-23
DAL791 Delta Air Lines 10 2026-07-25
DAL363 Delta Air Lines 10 2026-07-23
DAL321 - 10 2026-06-25
DAL479 Delta Air Lines 9 2026-06-24
DAL695 - 8 2026-06-26
DAL329 - 8 2026-06-26
DAL667 - 7 2026-06-30
DAL507 - 7 2026-06-26
DAL437 - 7 2026-06-24
DAL396 Delta Air Lines 7 2026-07-24
DAL383 - 7 2026-07-03
DAL2004 Delta Air Lines 7 2026-06-23
DAL724 Delta Air Lines 6 2026-07-23
DAL721 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1856 PLS → MSP Jul 26, 19:25 UTCJul 26, 22:45 UTC3h 20m
2026-07-26 DAL403 ATL → RDU Jul 26, 12:10 UTCJul 26, 17:05 UTC4h 55m
2026-07-25 DAL791 SEA → MSP Jul 25, 19:30 UTCJul 26, 00:15 UTC4h 45m
2026-07-25 DAL791 SEA → MSP Jul 25, 12:55 UTCJul 25, 17:30 UTC4h 35m
2026-07-24 DAL396 LGA → ATL Jul 24, 23:40 UTCJul 25, 04:30 UTC4h 50m
2026-07-24 DAL396 LGA → ATL Jul 24, 23:36 UTCJul 25, 04:23 UTC4h 47m
2026-07-24 DAL750 ATL → DAY Jul 24, 17:20 UTCJul 24, 21:55 UTC4h 35m
2026-07-24 DAL2326 JAX → ATL Jul 24, 14:55 UTCJul 24, 15:45 UTC50m
2026-07-24 DAL2326 JAX → ATL Jul 24, 12:40 UTCJul 24, 13:20 UTC40m
2026-07-23 DAL724 ATL → BTV Jul 23, 23:40 UTCJul 24, 03:55 UTC4h 15m
2026-07-23 DAL363 ATL → MEX Jul 23, 16:10 UTCJul 23, 21:50 UTC5h 40m
2026-07-23 DAL363 ATL → MEX Jul 23, 16:09 UTCJul 23, 21:49 UTC5h 40m
2026-07-22 DAL396 LGA → ATL Jul 22, 23:20 UTCJul 23, 04:05 UTC4h 45m
2026-07-22 DAL750 ATL → DAY Jul 22, 17:10 UTCJul 22, 21:35 UTC4h 25m
2026-07-22 DAL2326 JAX → ATL Jul 22, 14:50 UTCJul 22, 15:35 UTC45m
2026-07-22 DAL2326 JAX → ATL Jul 22, 12:30 UTCJul 22, 13:15 UTC45m
2026-07-22 DAL724 ATL → BTV Jul 22, 00:55 UTCJul 22, 05:25 UTC4h 30m
2026-07-22 DAL724 ATL → BTV Jul 22, 00:52 UTCJul 22, 05:18 UTC4h 26m
2026-07-21 DAL750 ATL → SFO Jul 21, 18:50 UTCJul 21, 23:10 UTC4h 20m
2026-07-21 DAL724 ATL → BTV Jul 21, 03:50 UTCJul 21, 08:20 UTC4h 30m
2026-07-21 DAL724 ATL → BTV Jul 21, 03:47 UTCJul 21, 08:14 UTC4h 27m
2026-07-20 DAL363 - Jul 20, 16:30 UTCJul 20, 21:50 UTC5h 20m
2026-07-19 DAL791 SEA → MSP Jul 19, 18:55 UTCJul 19, 23:20 UTC4h 25m
2026-07-18 DAL791 SEA → MSP Jul 18, 14:05 UTCJul 18, 18:25 UTC4h 20m
2026-07-17 DAL396 LGA → ATL Jul 17, 23:50 UTCJul 18, 04:45 UTC4h 56m
2026-07-17 DAL396 LGA → ATL Jul 17, 23:47 UTCJul 18, 04:46 UTC4h 59m
2026-07-17 DAL750 ATL → SFO Jul 17, 17:35 UTCJul 17, 22:05 UTC4h 30m
2026-07-17 DAL2326 JAX → ATL Jul 17, 14:48 UTCJul 17, 15:31 UTC43m
2026-07-17 DAL2326 - Jul 17, 12:40 UTCJul 17, 13:25 UTC45m
2026-07-17 DAL724 OAK → ATL Jul 17, 03:30 UTCJul 17, 07:50 UTC4h 20m
2026-07-16 DAL363 JFK → SFO Jul 16, 19:50 UTCJul 17, 01:49 UTC6h 0m
2026-07-16 DAL9966 - Jul 16, 16:40 UTCJul 16, 17:40 UTC1h 0m
2026-07-14 DAL556 - Jul 14, 04:10 UTCJul 14, 09:00 UTC4h 50m
2026-07-13 DAL2012 ATL → SNA Jul 13, 21:55 UTCJul 14, 01:55 UTC4h 0m
2026-07-13 DAL721 - Jul 13, 14:15 UTCJul 13, 19:15 UTC5h 0m
2026-07-13 DAL826 ATL → SNA Jul 13, 02:15 UTCJul 13, 06:01 UTC3h 45m
2026-07-12 DAL1521 - Jul 12, 19:45 UTCJul 13, 00:05 UTC4h 20m
2026-07-12 DAL1857 - Jul 12, 13:45 UTCJul 12, 17:40 UTC3h 55m
2026-07-11 DAL361 - Jul 11, 19:10 UTCJul 11, 23:10 UTC4h 0m
2026-07-11 DAL361 - Jul 11, 13:15 UTCJul 11, 17:35 UTC4h 20m
2026-07-10 DAL1856 - Jul 10, 19:35 UTCJul 10, 23:20 UTC3h 45m
2026-07-10 DAL403 JFK → SNA Jul 10, 12:00 UTCJul 10, 17:40 UTC5h 40m
2026-07-10 DAL556 - Jul 10, 04:10 UTCJul 10, 08:55 UTC4h 45m
2026-07-09 DAL2012 ATL → SNA Jul 9, 22:35 UTCJul 10, 02:40 UTC4h 5m
2026-07-09 DAL721 - Jul 9, 14:40 UTCJul 9, 18:35 UTC3h 55m
2026-07-09 DAL826 ATL → SNA Jul 9, 01:10 UTCJul 9, 05:10 UTC4h 0m
2026-07-08 DAL1521 - Jul 8, 19:50 UTCJul 8, 23:50 UTC4h 0m
2026-07-08 DAL1857 - Jul 8, 14:00 UTCJul 8, 18:00 UTC4h 0m
2026-07-08 DAL1856 - Jul 8, 00:30 UTCJul 8, 04:30 UTC4h 0m
2026-07-07 DAL1857 - Jul 7, 19:25 UTCJul 7, 23:25 UTC4h 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 N718TW page for operator, model, and routing details .

Mode-S A99B83 frequently asked

What is Mode-S code A99B83?
A99B83 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N718TW.
Where is Mode-S A99B83 registered?
Mode-S code A99B83 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 A99B83 broadcasting right now?
Yes. Mode-S A99B83 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A99B83, octal 52315603, decimal 11,115,395.
What flights does A99B83 operate?
Mode-S A99B83 has broadcast 20 distinct callsigns, including DAL786, DAL730, DAL392, DAL1857, DAL2012.