Yahoo Web Search Yahoo Settings. Sign In. Search query. All Images Videos News. Local Shopping. Anytime Past day Past week Past month. About 83,, search results. The San Francisco Zip Code in California is , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Percentage of Asians in Pennsylvania by Zip Code. Percentage of Chinese in Pennsylvania by Zip Code. Percentage of Filipinos in Pennsylvania by Zip Code.
Percentage of Japanese in Pennsylvania by Zip Code. Percentage of Koreans in Pennsylvania by Zip Code. Percentage of Hispanics in Pennsylvania by Zip Code.
Percentage of Mexicans in Pennsylvania by Zip Code. Percentage of Cubans in Pennsylvania by Zip Code. Percentage of Arabs in Pennsylvania by Zip Code. Percentage of Czechs in Pennsylvania by Zip Code. Percentage of Danish in Pennsylvania by Zip Code. Percentage of Dutch in Pennsylvania by Zip Code. Percentage of English in Pennsylvania by Zip Code. Percentage of French in Pennsylvania by Zip Code. Percentage of Germans in Pennsylvania by Zip Code. Las Vegas, often known simply as Vegas, is the 26th-most populous city in the United States, the most populous city in the state of Nevada, and the county seat of Clark County.
Yahoo Web Search Yahoo Settings. Sign In. Search query. All Images Videos News. Local Shopping. Anytime Past day Past week Past month. Also, not all area codes are currently in use. The NXX is also known as the prefix or exchange. Various telephone carriers will reserve blocks of telephone numbers by reserving an NXX within an area code.
Like area codes, not all prefixes are currently in use. Subscriber : Finally, the final 4 digits of the phone number are known as the subscriber or local number. Based on the total number of active NPA and NXX combinations reserved and that each one could have up to 10, possible subscriber numbers, the current total possible number of telephone numbers is 1,,, Remember though that phone numbers are no longer just used for standard home phones.
Many telephone numbers are now used for fax machines, cell phones or wireless phones, or internet connections so one person may actually need multiple phone lines. They were created to prepare for a nationwide unified long-distance direct dialing system - the ability to make a call to any other calling area without the need for an operator. The first digit did not allow a zero could be confused with the operator or a 1 techical reasons. At the time, rotary phones made it so that dialing lower numbers like 1 or 2 took less time to dial and dialing higher numbers took longer to dial.
Area codes with lower numbers that were easier to dial were given to high population and high call volume areas. The original area codes only existed in the US and Canada. Parts of Canada, Alaska, and Hawaii were not yet included.
When the phone formats we commonly use today first came into service in the s and the s, blocks of phone numbers were allocated to a phone carrier in 10, phone numbers ie. Frequently, the 10, numbers would be enough for a small town with larger towns being allocated multiple prefixes. Further, local phone carriers frequently had a monopoly on local phone service which prevented large portions of an allocated block from being unutilized. In the s, cell phones became much more popular which created an explosion of demand for new phone numbers.
Cell phones also reduced the monopoly of local phone providers which reduced utilization of allocated prefixes.
Instead of a single primary phone carrier, cities had two or more carriers - each needing their own prefix. In addition, the rise in popularity in the internet dial up and DSL and voice over IP VOIP , local interenet service providers and cable companies started to request prefixes. Many of these prefixes included few, if any, subscribers.
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