[WildHighlander57]

I recall someone posted on FR that room 641A was located in a different city.

[greeneyes]

I recall someone posted on FR that room 641A was located in a different city.
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SHRUG -There may be dozens or hundreds of room 641A across the country. Whether any such rooms are connected to NSA has not been proven.

However, I imagine that NSA has many listening/collecting hubs throughout the USA. Where they are and if any are in a room 641A is speculation at this point.