Apparatus

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sensors Mode-S transponder

AB0A73

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N810MD · EMBRAER ERJ-170-100 · operated by UMB BANK NA TRUSTEE

Hex
AB0A73
Octal
52605163
Decimal
11,209,331
Country
US
Tail
N810MD
Type
E170
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
601
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AB0A73.

Country allocation

The ICAO 24-bit address AB0A73 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
RPA5637 - 27 2026-07-20
RPA5608 - 24 2026-06-21
RPA5645 - 22 2026-06-21
RPA5822 - 20 2026-07-19
RPA5590 - 20 2026-07-19
RPA5817 - 17 2026-07-18
RPA5830 - 14 2026-07-18
RPA5734 - 14 2026-06-22
RPA5662 - 14 2026-06-30
RPA5729 - 13 2026-06-22
RPA5691 - 13 2026-07-14
RPA5642 Republic Airlines 13 2026-07-07
RPA5635 - 13 2026-07-08
RPA5618 - 13 2026-07-18
RPA5795 Republic Airlines 12 2026-05-01
RPA5772 - 11 2026-07-17
RPA5686 Republic Airlines 10 2026-06-20
RPA5675 - 10 2026-07-13
RPA5599 - 10 2026-07-22
RPA5791 - 9 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RPA5760 CMH → LGA Jul 26, 21:35 UTCJul 26, 22:30 UTC55m
2026-07-26 RPA5723 CLT → LGA Jul 26, 18:25 UTCJul 26, 20:10 UTC1h 45m
2026-07-26 RPA5723 CLT → LGA Jul 26, 15:35 UTCJul 26, 17:20 UTC1h 45m
2026-07-26 RPA5847 DCA → BOS Jul 26, 12:10 UTCJul 26, 14:00 UTC1h 50m
2026-07-25 RPA5853 RDU → LGA Jul 25, 21:29 UTCJul 25, 23:24 UTC1h 55m
2026-07-25 RPA5853 RDU → LGA Jul 25, 21:30 UTCJul 25, 23:30 UTC2h 0m
2026-07-25 RPA5833 JFK → PIT Jul 25, 18:00 UTCJul 25, 19:30 UTC1h 30m
2026-07-25 RPA5833 JFK → PIT Jul 25, 15:10 UTCJul 25, 16:40 UTC1h 30m
2026-07-25 RPA5794 CHS → JFK Jul 25, 12:45 UTCJul 25, 13:50 UTC1h 5m
2026-07-24 RPA5792 LGA → DCA Jul 24, 22:55 UTCJul 25, 00:00 UTC1h 5m
2026-07-24 RPA5792 LGA → DCA Jul 24, 22:52 UTCJul 24, 23:51 UTC59m
2026-07-24 RPA5833 JFK → PIT Jul 24, 20:20 UTCJul 24, 21:50 UTC1h 30m
2026-07-24 RPA5833 JFK → PIT Jul 24, 18:00 UTCJul 24, 19:35 UTC1h 35m
2026-07-24 RPA5742 DCA → BOS Jul 24, 16:22 UTCJul 24, 17:13 UTC51m
2026-07-24 RPA5742 DCA → BOS Jul 24, 16:25 UTCJul 24, 17:00 UTC35m
2026-07-24 RPA5742 DCA → BOS Jul 24, 14:25 UTCJul 24, 15:10 UTC45m
2026-07-24 RPA5806 BOS → LGA Jul 24, 10:10 UTCJul 24, 11:35 UTC1h 25m
2026-07-24 RPA5659 PHL → BOS Jul 24, 01:25 UTCJul 24, 02:50 UTC1h 25m
2026-07-23 RPA5646 BOS → CMH Jul 23, 22:30 UTCJul 24, 00:10 UTC1h 40m
2026-07-23 RPA5646 BOS → CMH Jul 23, 19:00 UTCJul 23, 20:45 UTC1h 45m
2026-07-23 RPA5643 BOS → PIT Jul 23, 15:55 UTCJul 23, 17:20 UTC1h 25m
2026-07-23 RPA5643 BOS → PIT Jul 23, 13:05 UTCJul 23, 14:50 UTC1h 45m
2026-07-23 RPA5799 LGA → BOS Jul 23, 10:45 UTCJul 23, 11:55 UTC1h 10m
2026-07-23 RPA5705 LGA → JAX Jul 23, 03:35 UTCJul 23, 04:20 UTC45m
2026-07-23 RPA5825 DCA → LGA Jul 23, 00:45 UTCJul 23, 02:35 UTC1h 50m
2026-07-22 RPA5825 DCA → LGA Jul 22, 21:55 UTCJul 22, 23:55 UTC2h 0m
2026-07-22 RPA5723 - Jul 22, 19:10 UTCJul 22, 20:45 UTC1h 35m
2026-07-22 RPA5723 LGA → MKE Jul 22, 16:10 UTCJul 22, 18:05 UTC1h 55m
2026-07-22 RPA5599 - Jul 22, 13:50 UTCJul 22, 15:05 UTC1h 15m
2026-07-21 RPA5886 CLT → PWM Jul 21, 19:25 UTCJul 21, 20:10 UTC45m
2026-07-21 RPA5643 BOS → PIT Jul 21, 13:25 UTCJul 21, 15:20 UTC1h 55m
2026-07-21 RPA5799 LGA → BOS Jul 21, 10:35 UTCJul 21, 11:30 UTC55m
2026-07-21 RPA5705 LGA → JAX Jul 21, 02:20 UTCJul 21, 03:10 UTC50m
2026-07-21 RPA5752 DCA → LGA Jul 21, 00:25 UTCJul 21, 01:10 UTC45m
2026-07-20 RPA5717 LGA → DCA Jul 20, 22:07 UTCJul 20, 22:52 UTC45m
2026-07-20 RPA5717 LGA → DCA Jul 20, 22:10 UTCJul 20, 22:55 UTC45m
2026-07-20 RPA5637 - Jul 20, 18:20 UTCJul 20, 20:00 UTC1h 40m
2026-07-20 RPA5637 SDF → LGA Jul 20, 18:18 UTCJul 20, 19:56 UTC1h 38m
2026-07-20 RPA5637 - Jul 20, 16:15 UTCJul 20, 17:15 UTC1h 0m
2026-07-20 RPA5637 - Jul 20, 15:35 UTCJul 20, 16:10 UTC35m
2026-07-20 RPA5847 - Jul 20, 12:10 UTCJul 20, 13:55 UTC1h 45m
2026-07-20 RPA5847 MSN → LGA Jul 20, 12:08 UTCJul 20, 13:57 UTC1h 49m
2026-07-20 RPA5853 LGA → MSN Jul 20, 01:10 UTCJul 20, 03:10 UTC2h 0m
2026-07-19 RPA5822 - Jul 19, 20:05 UTCJul 19, 20:45 UTC40m
2026-07-19 RPA5822 MVY → LGA Jul 19, 20:01 UTCJul 19, 20:48 UTC47m
2026-07-19 RPA5822 LGA → MVY Jul 19, 18:10 UTCJul 19, 18:40 UTC30m
2026-07-19 RPA5590 - Jul 19, 14:40 UTCJul 19, 16:15 UTC1h 35m
2026-07-18 RPA5830 - Jul 18, 19:10 UTCJul 18, 19:55 UTC45m
2026-07-18 RPA5830 ATL → HHH Jul 18, 19:07 UTCJul 18, 19:52 UTC45m
2026-07-18 RPA5817 - Jul 18, 17:35 UTCJul 18, 18:15 UTC40m

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 N810MD page for operator, model, and routing details .

Mode-S AB0A73 frequently asked

What is Mode-S code AB0A73?
AB0A73 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N810MD.
Where is Mode-S AB0A73 registered?
Mode-S code AB0A73 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 AB0A73 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 AB0A73, octal 52605163, decimal 11,209,331.
What flights does AB0A73 operate?
Mode-S AB0A73 has broadcast 20 distinct callsigns, including RPA5637, RPA5608, RPA5645, RPA5822, RPA5590.