The number showing as the sender of the text may be a foreign number that got mangled, or it may be a fake number sent by a telemarketer or a scammer.
Area code 210 is San Antonio, Texas. There are many cell phone carriers that serve the San Antonio area.
Yes, they can. The area code is given to you due to where you purchased the phone. You can use it anywhere in the world as long as your phone is near a cell phone tower.
In what country?
Ask your carrier for a number in area code 310.
The cell phone locator is an application/website that locates the geographical position of a cell phone by entering its phone number. The first 6 digits (area code and prefix code) indicate the latitude and longitude coordinates of the location of the phone.
Message Sender might be from other country than yours. If that is just the area code then that is a Little Rock, Arkansas area code.
This is the start of a mobile (cell) phone number.
There is no single cell phone prefix for the USA. Most cell phones are given numbers with the local area code of their owner.
There is no area code 278 in North America (USA, Canada, etc.).
First find on your phone the + symbol and type that in for the outgoing number. After that you need to type in the country code for Iraq which is 964. Your outbound dial should be +964 (area code) (phone number).
That feature is generally not available on cell phones, although there may be an app for that.
In general, 1 - area code - number