@Token Ah, good to know! I'm fairly new to this hobby, so thank you for the suggestions!
I probably don't need to now, but for the sake of completeness, I'll list the other details I heard:
- The mode was AM. No SSB.
- The numbers were spoken by a female voice in Spanish
- It was a 5 number series
- Other sounds included a digital transmission and a tone of some kind that separated it from the vocal portion of the transmission
I was able to make a recording of it, which I can post in case anyone would like to hear it.
A recording, in this case, is probably not needed, but is always a good idea to have available. When you hear something you find odd, make a recording, just in case.
Your description is a perfect example of HM01. AM, female voice, Spanish (shorthand SS), 5 numbers in a group (shorthand 5f), digital tones between each number group, frequency 10345 kHz, 0643 UTC. Every detail you describe fits HM01, the known HM01 schedule, and HM01 is the only currently active example that fits the majority of the details.
There is at least one other currently active numbers station (V07) that is a SS, female voice, and 5f, but it is in USB, has no digital component, and does not use that frequency or that time.
There are other, past, similar numbers stations, SS, female, and 5f. It would not be unheard of for a currently inactive, past used, numbers station to reactivate. So having all the details helps to confirm what you heard is not one of them. But again, none of the past stations fit your description so good to go.
T!
