+44 7880 is the beginning of a mobile number in the United Kingdom.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)
+44 7738 is the start of a mobile number in the UK
newcastle
This code is for dental insurance.
Country code +44 is the UK, and +44 7926 is a mobile code, along with the rest of +44 74 through +44 79.
Country code +44 is the United Kingdom. Area code +44 1303 (or 01303 in UK domestic format) is Folkestone.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.
The country code and area code of Coventry, United Kingdom is 44, (0)24.
Country code +44 is the United Kingdom.
Customer number 99016900081322
The country code and area code of Leeds, United Kingdom is 44, (0)113.
Until the early 1990's, area code +44 21 (or 021 within the UK) was Birmingham, which is now area code +44 121 (or 0121 within the UK). There has never been an area code +44 217 (or 0217) in the UK.
The country code and area code of Bracknell, United Kingdom is 44, (0)1344.
The country code and area code of Birmingham, United Kingdom is 44, (0)121.
The country code and area code of Cambridge, United Kingdom is 44, (0)1223.