Didn't recognize this number & called it back after stopping my number showing before calling back. I received message bank saying the number has been disconnected. I received 3 calls today from 3 different mobile numbers all starting with the same 7 numbers but ending in the last 3 digits being different. I'm guessing it comes from a call center. Number has now been blocked.

I keep missing calls from this mobile phone number &:every time I return the call - it says ' Number has been disconnected.

I just had a similar experience - it was one of three unknown numbers that called me today (with middle three numbers of 687) and didn't leave a message. One of the other numbers was identified by several other people on here as a 'telemarketer', so seems a massive coincidence if the calls aren't connected to the same source.