What city in Ireland has a city code of 0035 87?

Answer 1

00 isn't part of the city code or country code, it is a commonly used international access prefix, used in Western Europe and many other countries. However, many countries use other prefixes.

Ireland is telephone country code +353, not +35, and +358 is Finland.

A number in Ireland beginning with 087 (domestic format) or +353 87 (international format) is a mobile phone.

A number in Finland beginning with +358 7 is a non-geographic number for certain nationwide subscriber numbers and other purposes.

(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.)