Where is telephone country code 1510?

Answer 1

Telephone country code +1 is North America (USA, Canada, etc.), and area code +1 510 is Oakland, California, USA, and nearby cities on the east side of San Francisco Bay.

(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 Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)

Answer 2

There is no telephone country code +152.

Country code +1 is North America (USA, Canada, etc.), and 52 is the first two digits of a 3-digit area code. As it happens, though, +1 520 is the only such area code currently in use, serving Tucson, Arizona, USA.

(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 Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)

Answer 3

Telephone country code +1 is North America (USA, Canada, etc.), but area code +1 451 is unassigned and unused as of 2014.