Apparatus

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sensors Mode-S transponder

A7912A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N587NW · BOEING 757-300 · operated by DELTA AIR LINES INC

Hex
A7912A
Octal
51710452
Decimal
10,981,674
Country
US
Tail
N587NW
Type
B753
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
296
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A7912A.

Country allocation

The ICAO 24-bit address A7912A 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
DAL1797 - 12 2026-07-11
DAL673 - 11 2026-07-19
DAL1243 - 10 2026-07-16
DAL1747 Delta Air Lines 9 2026-05-06
DAL655 - 7 2026-04-18
DAL554 Delta Air Lines 6 2026-07-25
DAL2560 Delta Air Lines 6 2026-04-19
DAL2555 Delta Air Lines 6 2026-04-19
DAL1725 Delta Air Lines 6 2026-04-19
DAL953 - 5 2026-06-26
DAL812 - 5 2026-07-16
DAL714 - 5 2026-07-15
DAL565 - 5 2026-07-13
DAL530 Delta Air Lines 5 2026-04-25
DAL522 Delta Air Lines 5 2026-05-04
DAL444 - 5 2026-07-25
DAL337 Delta Air Lines 5 2026-05-05
DAL2593 Delta Air Lines 5 2026-05-02
DAL2298 Delta Air Lines 5 2026-05-03
DAL2225 Delta Air Lines 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL914 LAX → MSP Jul 26, 19:50 UTCJul 26, 22:30 UTC2h 40m
2026-07-26 DAL2102 ATL → DAL Jul 26, 14:35 UTCJul 26, 18:00 UTC3h 25m
2026-07-26 DAL1310 ATL → MSP Jul 26, 03:15 UTCJul 26, 05:30 UTC2h 15m
2026-07-25 DAL554 LAX → JFK Jul 25, 19:40 UTCJul 25, 23:45 UTC4h 5m
2026-07-25 DAL444 ATL → SEA Jul 25, 12:55 UTCJul 25, 17:35 UTC4h 40m
2026-07-25 DAL444 ATL → SEA Jul 25, 12:52 UTCJul 25, 17:26 UTC4h 34m
2026-07-25 DAL783 SLC → RDU Jul 25, 07:05 UTCJul 25, 10:55 UTC3h 50m
2026-07-25 DAL500 SLC → SEA Jul 25, 00:35 UTCJul 25, 04:30 UTC3h 55m
2026-07-24 DAL797 DTW → HNL Jul 24, 22:10 UTCJul 24, 22:55 UTC45m
2026-07-24 DAL797 DTW → HNL Jul 24, 16:20 UTCJul 24, 20:10 UTC3h 50m
2026-07-24 DAL505 ATL → LGA Jul 24, 03:30 UTCJul 24, 06:45 UTC3h 15m
2026-07-23 DAL942 ATL → SJC Jul 23, 22:15 UTCJul 24, 00:55 UTC2h 40m
2026-07-23 DAL889 PDX → JFK Jul 23, 16:36 UTCJul 23, 19:44 UTC3h 8m
2026-07-23 DAL889 PDX → JFK Jul 23, 16:40 UTCJul 23, 19:45 UTC3h 5m
2026-07-23 DAL1250 MSP → BDL Jul 23, 11:25 UTCJul 23, 14:20 UTC2h 55m
2026-07-23 DAL2309 DCA → MSP Jul 23, 02:10 UTCJul 23, 04:35 UTC2h 25m
2026-07-22 DAL914 LAX → MSP Jul 22, 19:55 UTCJul 22, 23:10 UTC3h 15m
2026-07-22 DAL2102 ATL → DAL Jul 22, 14:40 UTCJul 22, 18:00 UTC3h 20m
2026-07-22 DAL472 LAS → DTW Jul 22, 00:00 UTCJul 22, 04:40 UTC4h 40m
2026-07-21 DAL562 LAX → JFK Jul 21, 15:00 UTCJul 21, 19:05 UTC4h 5m
2026-07-21 DAL505 ATL → LGA Jul 21, 04:25 UTCJul 21, 07:35 UTC3h 10m
2026-07-20 DAL2225 ATL → ALB Jul 20, 23:15 UTCJul 21, 02:35 UTC3h 19m
2026-07-20 DAL2225 ATL → ALB Jul 20, 18:10 UTCJul 20, 21:05 UTC2h 55m
2026-07-20 DAL1282 MCO → LGA Jul 20, 13:40 UTCJul 20, 16:25 UTC2h 45m
2026-07-20 DAL2246 MSP → LAS Jul 20, 00:45 UTCJul 20, 03:20 UTC2h 35m
2026-07-19 DAL673 PPM → MSP Jul 19, 19:05 UTCJul 19, 22:30 UTC3h 25m
2026-07-19 DAL673 MSP → FLL Jul 19, 14:30 UTCJul 19, 17:25 UTC2h 55m
2026-07-19 DAL377 JFK → SFO Jul 19, 07:15 UTCJul 19, 11:55 UTC4h 40m
2026-07-18 DAL377 JFK → SFO Jul 18, 23:25 UTCJul 19, 04:50 UTC5h 25m
2026-07-18 DAL1282 MCO → LGA Jul 18, 19:15 UTCJul 18, 22:00 UTC2h 45m
2026-07-18 DAL2246 MSP → LAS Jul 18, 00:39 UTCJul 18, 03:20 UTC2h 41m
2026-07-17 DAL673 - Jul 17, 19:30 UTCJul 17, 22:55 UTC3h 25m
2026-07-17 DAL673 MSP → FLL Jul 17, 14:15 UTCJul 17, 17:25 UTC3h 10m
2026-07-17 DAL2084 - Jul 17, 08:35 UTCJul 17, 11:45 UTC3h 10m
2026-07-17 DAL694 SEA → CVG Jul 17, 02:34 UTCJul 17, 06:29 UTC3h 55m
2026-07-17 DAL694 SEA → CVG Jul 17, 02:30 UTCJul 17, 06:25 UTC3h 55m
2026-07-16 DAL1243 TPA → DTW Jul 16, 22:19 UTCJul 17, 00:35 UTC2h 15m
2026-07-16 DAL1243 - Jul 16, 18:29 UTCJul 16, 20:39 UTC2h 10m
2026-07-16 DAL812 - Jul 16, 13:00 UTCJul 16, 16:40 UTC3h 40m
2026-07-15 DAL714 ATL → SEA Jul 15, 22:10 UTCJul 16, 02:40 UTC4h 30m
2026-07-15 DAL782 - Jul 15, 15:20 UTCJul 15, 19:25 UTC4h 5m
2026-07-15 DAL575 - Jul 15, 03:25 UTCJul 15, 07:30 UTC4h 5m
2026-07-14 DAL554 SEA → ATL Jul 14, 19:40 UTCJul 15, 00:05 UTC4h 24m
2026-07-14 DAL734 - Jul 14, 14:00 UTCJul 14, 18:00 UTC4h 0m
2026-07-14 DAL502 LAS → DTW Jul 14, 08:40 UTCJul 14, 12:20 UTC3h 40m
2026-07-14 DAL502 LAS → DTW Jul 14, 08:39 UTCJul 14, 12:08 UTC3h 29m
2026-07-14 DAL916 - Jul 14, 03:40 UTCJul 14, 07:00 UTC3h 20m
2026-07-13 DAL1243 TPA → DTW Jul 13, 22:30 UTCJul 14, 00:40 UTC2h 10m
2026-07-13 DAL1243 - Jul 13, 18:25 UTCJul 13, 20:50 UTC2h 25m
2026-07-13 DAL812 SEA → DTW Jul 13, 12:45 UTCJul 13, 16:30 UTC3h 45m

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 N587NW page for operator, model, and routing details .

Mode-S A7912A frequently asked

What is Mode-S code A7912A?
A7912A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N587NW.
Where is Mode-S A7912A registered?
Mode-S code A7912A 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 A7912A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7912A, octal 51710452, decimal 10,981,674.
What flights does A7912A operate?
Mode-S A7912A has broadcast 20 distinct callsigns, including DAL1797, DAL673, DAL1243, DAL1747, DAL655.