LTE Connection via SpaceX - G-NetTrack Readings in Japan

SpaceX LTE Network (MCC 440 / MNC 55) Logged – Analysis


:satellite: Network Overview

App: G-NetTrack Pro
Operator: SpaceX
(This likely refers to Starlink’s experimental LTE service via satellite)


LTE Network Details

  • MCC: 440 → Japan :jp:
  • MNC: 55
  • TAC (Tracking Area Code): 52630
  • eNB (Base Station ID): 11688
  • CID (Cell ID): 55
  • PCI (Physical Cell ID): 275
  • Type: LTE
  • Band: L1
  • ARFCN: 25
  • DL Frequency: 2112.5 MHz
  • UL Frequency: 1922.5 MHz
  • Bandwidth: 5 MHz

Signal Quality Metrics

Parameter Value Meaning
RSRP -123 dBm Very weak signal
RSRQ -9 dB Poor signal quality
SNR 3.0 dB Low signal-to-noise ratio
RSSI -113 dBm Very weak received power
CQI - Not reported (likely due to idle or poor quality)

These values indicate a very weak LTE signal, which is expected in early-stage satellite LTE tests.


Location & Movement

  • Latitude: 35.191878
  • Longitude: 136.435645
  • Speed: 24 km/h
  • Heading: 292° NW
  • Altitude: 464 m

Looks like this reading was taken in a moving vehicle.


Data Throughput

  • Download (DL): 0 kbps
  • Upload (UL): 0 kbps
  • Status: IDLE (no active data transfer)

Notes

  • Operator shows “SpaceX”: This likely points to a Starlink LTE satellite test, either:

    • Through a satellite-connected LTE base station (terrestrial cell backhauled by satellite), or
    • A direct-to-device satellite LTE test (experimental).
  • The ARFCN 25 and L1 Band are not typical for public LTE usage – suggesting a private or experimental band, possibly for satellite trials.

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2.1GHz :roll_eyes:

KDDI AU with Starlink LTE

Does anyone know which handset was used in this test?

There’s also a test video available on X:

:link: https://x.com/denpa893/status/1923686380728877109

The signal is not very stable current stage, hopefully would become more stable in future.

Amid the mountains in Japan:


Who even walks around out here?!

Haha, see? Not even Japan has signal in the countryside.

Hahaha, this is amazing! :grinning:

As a fan of both technology and outdoor sports, I can’t help but get excited about this kind of geolocation development!

I’ve done many multi-day treks where I was completely off the grid, far from any traditional mobile network coverage. For years now, I’ve relied on SPOT (Globalstar) services for tracking, communication, and emergency support.

I use a dedicated device - the SPOT X (see attached photo) - with a monthly plan that includes messaging, movement alerts every 30 minutes, and tracking with a minimum interval of 2.5 minutes (not real-time).

The service is excellent - honestly the best in the market - and that’s why I’ve been a loyal customer for over 8 years.

But it’s incredible to see how technology keeps evolving and making life simpler, especially with the rise of D2C/D2D (Direct-to-Cell/Device) solutions.

Today, just to stay somewhat connected in remote areas, I carry a smartphone, a dedicated communicator, two backup batteries… and still pay for two separate service plans.

This is real proof that we’re living through a transformation - less complexity, more connectivity.

And that’s just from the perspective of someone visiting these places. Imagine the positive impact for the entire ecosystem working in these regions: forest rangers, rescue teams, monitoring operations, and more.

This is actually KDDI operator MCC and MNC, Starlink is just Satellite service provider

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