077009 is a fake mobile telephone number prefix.
If you have been contacted by someone claiming their number starts with 077009, you should be wary as the caller ID has probably been spoofed i.e. your telephone is reporting a false caller number.
Do not answer unexpected calls from 077009 numbers as they are likely to be from a scammer.
The 0077009 numbers have been allocated for use in UK TV and films where the makers don’t want viewers calling up a real phone number and causing annoyance. But some scammers have started to use these numbers in messages etc. so as to hide their real number.
In the USA most films and TV use numbers that have 555 as the central portion as these are easily recognisable as fake.
Most countries seem to have set ranges of fake phone numbers for various purposes.
If you are interested, the website https://fakenumber.org/ lists lots of these numbers.
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