Are these spam calls?

Been getting calls about every 1-2 mins from the same number - number comes from Slovakia. What on earth is this?? Any Ideas?

Either your extension 1001 has been compromised or you are promiscuously allowing anonymous or guest sip calls to UDP/5060

“Allow Guest SIP Calls” was enabled, disabled it and it stopped. We dont have that as an extension so I found that odd

Not so odd, If you allow anonymous calls, how would Asterisk know if an extension exists before answering? (Don’t confuse DID with CID)

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