The Republic of Ireland is telephone country code +353. Roscommon is in Ireland's telephone area code 090, which becomes +353 90 in international format.
(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.)
Roscommon is in area code +353 90. From Australia, dial 0011 353 90.
Kilcar in County Donegal, Ireland, is in area code 074, which is +353 74 in international format.
0035321 + the local number
Rowley Regis is in area code 0121, the same as Birmingham. To call from Ireland, dial: 00 = international access prefix from Ireland 44 = country code for UK 121 = UK area code, dropping the leading 0 (7-digit subscriber number)
Essex has several different telephone area codes. To call the UK from the Republic of Ireland, replace the leading 0 of the UK domestic number with 00 44.
There is no telephone area code 185 in Russia.
003531
The country code and area code of Letterkenny, Ireland is 353, (0)74.
The country code and area code of Carlow, Ireland is 353, (0)59.
The country code and area code of Dundalk, Ireland is 353, (0)42.
The country code and area code of Ennis, Ireland is 353, (0)65.
The country code and area code of Portlaoise, Ireland is 353, (0)57.