Every area code is used by some scammers, but 301 (southern and western Maryland, including the Washington, D.C., suburbs) and 616 (Grand Rapids, MI, and nearby areas) are ordinary area codes mostly full of legitimate numbers.
Area codes are discrete data.
Telemarketing scams use every telephone area code that exists, and quite a few that don't. Unfortunately, it is very easy for anyone with a PBX (business phone system) to send whatever number they please instead of valid Caller ID data.
In the UK, There are various telephone phone numbers and codes that can be used by businesses and consumers. Business users can obain 0800, 0845, 0870, 0871 and 03 telephone codes for free. Each code has it's own use and purpose. There has also been a trend to obain 01/02 local area codes, this can be very useful for attracting new customers from outside your normal local area.
If you're asking about telephone area codes, 750 is not currently used in the North American Numbering Plan.
60615 is not an area code. Area codes in the US are 3 digits and are used with telephone numbers. The postal ZIP Code 60615 is for Chicago, IL.
I'm guessing that you mean STD = Subscriber Trunk Dialling (telephone area code) rather than STD = Sexually Transmitted Disease. STD code is another term used in some country for telephone area codes. The purpose of a telephone area code is to group telephone numbers by geographic area. In many cases, at least some calls to numbers with the same STD code as the caller can be dialed without the STD code, allowing shorter dialing sequences for many local calls.
Yes, a number in area code 855 can be used for a fax machine. A fax number is just a telephone number that currently has a fax machine connected to it instead of (or in addition to) a regular telephone. Area code 855 is toll-free within North America (USA, Canada, etc.), along with area codes 800, 888, 877, and 866, and future area codes 844, 833, and 822.
Telephone country code +1407 is not assigned to any specific country. Country calling codes are assigned by the International Telecommunication Union (ITU), and +1 is the country code for North America, including the United States, Canada, and several Caribbean nations. The area code 407 is used in the United States for parts of Central Florida, including Orlando. It is important to note that country codes and area codes are different numbering systems used in telecommunications.
Area codes were introduced in the US and Canada in 1947, although subscriber dialing with area codes was phased in gradually over many years. Area codes were introduced in the UK in 1958. In order to facilitate direct dialing calls, the NANP was created and instituted in 1947 by AT&T, also known as the Bell System, the U.S. telephone semi-monopoly. At first, the codes were used only by long-distance operators; the first customer-dialed calls using area codes did not occur until November 10, 1951, when the first directly-dialed call was made from Englewood, New Jersey to Alameda, California. Direct dialing was gradually instituted throughout the country, and by the mid-1960s, it was commonplace in most larger cities.
Telephone code 696 is assigned to the Indian telecom network and is specifically used for the state of Madhya Pradesh. It is part of the area codes used for landline and mobile services within the region. If you receive a call from this code, it's likely originating from Madhya Pradesh.
In India, the telephone area code 0140 is assigned to the city of Jaipur, which is the capital of the state of Rajasthan. Telephone area codes are used to identify a specific geographic area for routing calls efficiently. Jaipur is a major cultural and historical city known for its palaces, forts, and vibrant markets.
An international telephone number typically consists of a country code, a city code, and a local number, although some countries do not use city codes. A city code is another term for a telephone area code, although area codes are often quoted including a domestic trunk prefix that is always omitted for the city code. Using a city code allows for shorter local numbers, since the same local number can be reused in different city codes in the same country.