Brazilian area code +55 81 is in the state of Pernambuco, including Recife, Caruaru, and Fernando de Noronha.
(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.)
The country code and area code of Fortaleza- CE, Brazil is 55, (0)85.
I can find no indication that the area code for Ghaziabad was ever 085. All current area codes beginning with 085 are in Andhra Pradesh, not Uttar Pradesh, halfway across the country. The area code for Ghaziabad is 0120.
UK telephone area code 01938 is Welshpool, Wales. A number beginning with 01938 85 is most likely a BT landline in Castle Caereinion; however, with number portability, any 01938 number could be located anywhere in the Welshpool area, served by any local telephone company.
The country code and area code of Hoei, Belgium is 32, (0)85.
The country code and area code of Marcali, Hungary is 36, (06)85.
The country code and area code of Bar, Montenegro is 382, (0)85.
The country code and area code of Uyo, Nigeria is 234, (0)85.
The country code and area code of Bialystok, Poland is 48, (0)85.
The country code and area code of Pyin Oo Lwin, Myanmar is 95, (0)85.
The country code and area code of Agusan del Norte, Philippines is 63, (0)85.
The city of Rio de Janeiro is in area code +55 21; other parts of the state of Rio de Janeiro are in area codes +55 22 and +55 24. Mobile numbers use the same geographic area codes as landlines. (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, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
It would have been more helpful knowing the next digit in the number to narrow it down any further. Information supplied by British Telecom - indicates that there are four towns in Brazil all start with area code '8'... Fortaleza (85) Joao Pessoa (83) Maceio (82) Natal (84)