Mobile phone numbers
07803 numbers are for mobile phones in the United Kingdom.
All UK 07 numbers are for mobiles, pagers and personal numbering.
Which network is 07803?
07803 numbers are allocated to O2.
It is no longer possible to tell the operator of a UK mobile phone from its number alone, as customers are free to take their number with them when they change networks. The 07803 prefix is not a reliable indicator of which network a phone is currently connected to, only which network issued it originally.
Formatting an 07803 number
There is no set format for UK mobile phone numbers, but the commonest format is: 07803 xxxxxx
For international callers, use: +44 7803 xxxxxx