Apparatus

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sensors Mode-S transponder

A94B0B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N69819 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A94B0B
Octal
52245413
Decimal
11,094,795
Country
US
Tail
N69819
Type
B739
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
460
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S A94B0B.

Country allocation

The ICAO 24-bit address A94B0B 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
UAL688 United Airlines 6 2026-04-19
UAL279 United Airlines 5 2026-07-23
UAL2784 - 4 2026-06-29
UAL2752 - 4 2026-06-29
UAL1864 - 4 2026-07-19
UAL1591 United Airlines 4 2026-07-01
UAL1417 United Airlines 4 2026-06-09
UAL490 - 3 2026-06-29
UAL485 - 3 2026-07-14
UAL403 - 3 2026-06-28
UAL2631 United Airlines 3 2026-04-13
UAL2627 - 3 2026-07-11
UAL2600 - 3 2026-04-16
UAL2419 United Airlines 3 2026-05-06
UAL2376 United Airlines 3 2026-04-15
UAL2370 United Airlines 3 2026-05-13
UAL2336 United Airlines 3 2026-05-22
UAL1994 United Airlines 3 2026-05-17
UAL1987 United Airlines 3 2026-05-25
UAL1596 - 3 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1056 SFO → CMH Jul 26, 19:10 UTCJul 26, 20:55 UTC1h 45m
2026-07-26 UAL1014 IAH → CUN Jul 26, 15:35 UTCJul 26, 17:15 UTC1h 40m
2026-07-26 UAL387 YVR → LAX Jul 26, 02:50 UTCJul 26, 05:50 UTC3h 0m
2026-07-25 UAL684 LAS → LAX Jul 25, 20:05 UTCJul 26, 00:45 UTC4h 40m
2026-07-25 UAL1869 SFO → IAD Jul 25, 16:35 UTCJul 25, 18:00 UTC1h 25m
2026-07-25 UAL1933 SNA → ORD Jul 25, 13:10 UTCJul 25, 14:20 UTC1h 10m
2026-07-25 UAL1625 EWR → DEN Jul 25, 05:05 UTCJul 25, 06:05 UTC1h 0m
2026-07-25 UAL1625 EWR → DEN Jul 25, 05:18 UTCJul 25, 06:05 UTC47m
2026-07-25 UAL546 DEN → TUS Jul 25, 00:35 UTCJul 25, 02:45 UTC2h 10m
2026-07-24 UAL2489 SDQ → EWR Jul 24, 19:55 UTCJul 24, 21:15 UTC1h 20m
2026-07-24 UAL1984 ORD → SFO Jul 24, 12:15 UTCJul 24, 15:40 UTC3h 25m
2026-07-24 UAL1984 ORD → SFO Jul 24, 12:15 UTCJul 24, 16:06 UTC3h 51m
2026-07-24 UAL2029 ORD → RIC Jul 24, 01:35 UTCJul 24, 04:00 UTC2h 25m
2026-07-23 UAL2213 LAX → EWR Jul 23, 20:25 UTCJul 23, 23:30 UTC3h 5m
2026-07-23 UAL2120 MFE → IAH Jul 23, 14:40 UTCJul 23, 16:50 UTC2h 10m
2026-07-23 UAL788 SFO → PSP Jul 23, 10:40 UTCJul 23, 12:50 UTC2h 10m
2026-07-23 UAL279 CLT → EWR Jul 23, 02:25 UTCJul 23, 04:35 UTC2h 10m
2026-07-23 UAL279 CLT → EWR Jul 23, 02:04 UTCJul 23, 04:44 UTC2h 40m
2026-07-22 UAL1379 ORD → EWR Jul 22, 22:15 UTCJul 23, 00:50 UTC2h 35m
2026-07-22 UAL2497 ORD → BOS Jul 22, 17:25 UTCJul 22, 19:35 UTC2h 10m
2026-07-22 UAL1761 SAN → SFO Jul 22, 02:05 UTCJul 22, 03:45 UTC1h 40m
2026-07-21 UAL1494 ANC → SFO Jul 21, 22:35 UTCJul 21, 23:50 UTC1h 15m
2026-07-21 UAL1349 RSW → IAD Jul 21, 19:55 UTCJul 21, 20:50 UTC55m
2026-07-21 UAL1334 EWR → PBI Jul 21, 15:40 UTCJul 21, 16:55 UTC1h 15m
2026-07-21 UAL2247 SFO → IAD Jul 21, 12:45 UTCJul 21, 13:45 UTC1h 0m
2026-07-21 UAL2247 SFO → IAD Jul 21, 12:42 UTCJul 21, 13:43 UTC1h 1m
2026-07-21 UAL546 - Jul 21, 01:05 UTCJul 21, 02:50 UTC1h 45m
2026-07-20 UAL1190 MCO → EWR Jul 20, 18:45 UTCJul 20, 23:10 UTC4h 25m
2026-07-20 UAL1895 IAH → PHX Jul 20, 14:55 UTCJul 20, 17:15 UTC2h 20m
2026-07-20 UAL320 DEN → BOS Jul 20, 11:10 UTCJul 20, 13:20 UTC2h 10m
2026-07-20 UAL320 DEN → BOS Jul 20, 11:13 UTCJul 20, 13:10 UTC1h 57m
2026-07-20 UAL377 ORD → DEN Jul 20, 03:15 UTCJul 20, 05:10 UTC1h 55m
2026-07-19 UAL1686 IAH → SNA Jul 19, 22:15 UTCJul 20, 01:35 UTC3h 20m
2026-07-19 UAL370 EWR → LAS Jul 19, 15:45 UTCJul 19, 20:10 UTC4h 25m
2026-07-19 UAL1864 - Jul 19, 11:25 UTCJul 19, 13:50 UTC2h 25m
2026-07-19 UAL1864 MIA → EWR Jul 19, 11:22 UTCJul 19, 13:45 UTC2h 23m
2026-07-18 UAL445 EWR → MIA Jul 18, 21:50 UTCJul 19, 00:35 UTC2h 45m
2026-07-18 UAL445 EWR → MIA Jul 18, 20:39 UTCJul 19, 00:30 UTC3h 51m
2026-07-18 UAL1309 EWR → SNA Jul 18, 10:30 UTCJul 18, 12:55 UTC2h 25m
2026-07-17 UAL1544 SFO → DEN Jul 17, 23:45 UTCJul 18, 02:00 UTC2h 15m
2026-07-17 UAL1643 MCO → EWR Jul 17, 19:40 UTCJul 17, 21:55 UTC2h 15m
2026-07-17 UAL1643 MCO → EWR Jul 17, 18:53 UTCJul 17, 21:49 UTC2h 56m
2026-07-17 UAL1739 - Jul 17, 14:10 UTCJul 17, 16:15 UTC2h 5m
2026-07-17 UAL2828 AMS → SFO Jul 17, 10:25 UTCJul 17, 12:00 UTC1h 35m
2026-07-17 UAL2291 EWR → SAV Jul 17, 02:20 UTCJul 17, 03:55 UTC1h 35m
2026-07-16 UAL1395 IAD → BDL Jul 16, 21:25 UTCJul 16, 23:59 UTC2h 35m
2026-07-16 UAL1797 - Jul 16, 17:57 UTCJul 16, 19:58 UTC2h 1m
2026-07-16 UAL1797 - Jul 16, 17:54 UTCJul 16, 20:00 UTC2h 5m
2026-07-16 UAL2204 TPA → EWR Jul 16, 13:40 UTCJul 16, 16:00 UTC2h 20m
2026-07-16 UAL1544 EWR → TPA Jul 16, 00:28 UTCJul 16, 02:42 UTC2h 14m

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 N69819 page for operator, model, and routing details .

Mode-S A94B0B frequently asked

What is Mode-S code A94B0B?
A94B0B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N69819.
Where is Mode-S A94B0B registered?
Mode-S code A94B0B 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 A94B0B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A94B0B, octal 52245413, decimal 11,094,795.
What flights does A94B0B operate?
Mode-S A94B0B has broadcast 20 distinct callsigns, including UAL688, UAL279, UAL2784, UAL2752, UAL1864.