I just had the same call and it displayed as "NULL", too. I did not take the call and found your posting here. I am a Japanese translator and found it is very annoying if this call was made someone who got some sort of translators' telephone numbers list.
Got an obscene call from this number. When I called the number back, i got a recording stating that the number was not in service. This must be a spoofed number. It registers out of Miami, Florida. I used to get the same kind of calls from another number, 213-702-5501. This is really annoying. Anyone else having these problems>?
I received a call from 305-512-1199, from an Argentinian woman named Maryanne, says she works for iCall a spanish language translations service with offices in Houston, Tx and Argentina. She says they are a translate from Spanish to English for documents. When i tried to call back the # 305-512-1199, a recording say that this number cannot be dialed, yet this is what appears on the caller id. This is something funny about this call and tel number.
Caller ID: 305-512-1199