Phone the Czech Republic: Czech phone number, Czech telephone directory, Czech phone code
Finding a Czech phone number is simple, an online telephone directory easily available and the phone system efficient. The Czech Republic phone country code is 420. There are no area codes, so you just add the whole 9 digit subscriber number.
As far as mobile (cell) phones are concerned, here are three main GSM cell phone companies in the Czech Republic: T-mobile, Vodafone and O2, and also U:fon which runs a CDMA network.
Free telephone number search
CZECH TELEPHONE DIRECTORY
http://phone.fin.cz/: White pages directory of people and businesses in English. For people, fill at least "Last name" field and "City" or "Phone area" fields. For companies, fill in at least the "Company" or "Keyword" field and select a region for the company.
O2 ACTIVE PHONEBOOK
http://telefonniseznam.o2active.cz/jnp/cz/index.html: White Pages for the Czech Republic. Simple but sophisticated search. You need to enter the name, last name, street, city, or company name a surname or company name, and press "Vyhledat". The Google translation is OK, or here’s a key:
Příjmení – last name; Jméno – first name; Ulice – street; Číslo domu – house number; Obec – city/town/village; Část obce – town district; Tel. obvod – calling area (region); Používám diakritiku – I’m using the Czech diacritical marks (uncheck the box if you’re not, and you probably won’t be!).
http://en.zlatestranky.cz/index.php?locale=en_CZ: Yellow pages directory of Czech Republic businesses. In English (via little flag top right)