Who called from 308

Hi

I've been receiving a few strange calls lately on my mobile the latest being from "+308". That's all, just "+308".

There are several other 3-digit numbers calling me too.

I never answer. Does anyone else have experience of this?

Regards.

Yes, I got call from that number in Malaysia. I didn't pick up.

+308 number called. didn't pick up. Looks like greece country code.

+308... I received called from this no. also. Instead another 2 nos. also...+301 and +381... I never pick-up the call. Where did this no. from????

Just got this number... didn't answer though