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Area codes 809, 829, and 849

Area codes 809, 829, and 849 is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Area codes 809, 829, and 849 rather than just read about it. In short: Area codes 809, 829, and 849 are telephone area codes in the North American Numbering Plan (NANP) for the Dominican Republic. Like all NANP members, the Dominican Republic uses country code 1, and has similar dialing procedures for dialing the ten-digit national telephone numbers, which consist of the area code, a three-digit central office code, and a four-digit line number.

Key takeaways

  • Area codes 809, 829, and 849 belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Area codes 809, 829, and 849 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Area codes 809, 829, and 849 from memory before moving on to harder problems.

Reference excerpt

Area codes 809, 829, and 849 are telephone area codes in the North American Numbering Plan (NANP) for the Dominican Republic. Like all NANP members, the Dominican Republic uses country code 1, and has similar dialing procedures for dialing the ten-digit national telephone numbers, which consist of the area code, a three-digit central office code, and a four-digit line number. The three area codes of the country are organized as an overlay complex for a single numbering plan area (NPA), comprising the entire country. Thus, ten-digit dialing is mandatory.

Area code 809 Area code 809 was assigned in 1958 to Puerto Rico. In the 1960s, Bermuda and the Caribbean were added. Cuba, Haiti, the Netherlands Antilles, and the French West Indies decided not to participate in the North American Numbering Plan. Beginning with Bermuda in November 1994, and the Bahamas, Puerto Rico, and Barbados in 1995, several countries in the Caribbean received individual area code assignments from the NANPA, effectively splitting area code 809. By 1999, it was retained only by the Dominican Republic, following the departure of Saint Vincent and the Grenadines from using the area code.

Area codes 829 and 849 Area code 829 was added for all of the Dominican Republic to form an all-services distributed overlay on January 31, 2005. Earliest central office assignments were possible on October 1, 2005. The relief was needed because of the growth of mobile phone communication in the Dominican Republic, starting in the mid-1990s with prepaid telephone cards, and growing quickly through the early 2000s with the launch of two cellphone carriers, Orange (now Altice) and Centennial (now Viva), in addition to the preexisting CODETEL (now Claro Dominicana) and TRICOM (now Altice Dominicana). The expansion in telecommunication services continued and further relief for the numbering resources was needed in 2009, when an additional area code was assigned for the numbering plan area, area code 849. Earliest central office code assignments were possibly on July 1, 2009, but did not occur until 2010.

Calling scam Telephone fraud scams once involved area code 809; it was being used since calling international numbers from the United States is charged at a higher rate than domestic calls. The charge is set jointly by the originating and terminating countries; the foreign country portion of the charge could be very high, and was not regulated. There may have been a resurgence with wireless telephones. The victim received a message on an answering machine to call a number with an 809 area code. However, the number dialed is an international call with a share of the revenue going from the foreign telephone company to the operator of the number. The victim could be put on hold indefinitely, and billed for each minute. A similar scam emerged due to the prevalence of wireless phones which display callback numbers automatically, known as the "one ring scam". The perpetrator of the scam calls the victim via a robodialer or similar means, sometimes during night time, then hangs up after the call is answered with the hope that the receiver will be curious enough to call back, which incurs an automatic $19.95 international fee, as well as $9.00/min thereafter. Similar scams have been linked to Grenada (area code 473), Antigua (area code 268), Jamaica (area code 876) and the British Virgin Islands (area code 284).

See also Area codes in the Caribbean List of North American Numbering Plan area codes Telecommunications in the Dominican Republic

References

External links Telecommunications in The Caribbean Archived 2011-07-25 at the Wayback Machine Federal Communications Commission regarding the 809 scam AT&T webpage regarding the 809 scam and subsequent spam. Retrieved September 17, 2007. scambusters.org webpage regarding the spammed version of their 809 warning. Retrieved May 7, 2006.

Worked examples

Example 1 — a first encounter with Area codes 809, 829, and 849

Start with the simplest possible case. Write down what Area codes 809, 829, and 849 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Area codes 809, 829, and 849 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Area codes 809, 829, and 849 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Area codes 809, 829, and 849

In research
Area codes 809, 829, and 849 appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Area codes 809, 829, and 849 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Area codes 809, 829, and 849 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Area codes in the Caribbean, Communications in the Dominican Republic, Dominican Republic communications-related lists, so understanding it makes those chapters shorter.
In everyday life
Look for Area codes 809, 829, and 849 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Area codes 809, 829, and 849 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Area codes 809, 829, and 849 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Area codes 809, 829, and 849 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Area codes 809, 829, and 849 in simple terms?

Area codes 809, 829, and 849 are telephone area codes in the North American Numbering Plan (NANP) for the Dominican Republic. Like all NANP members, the Dominican Republic uses country code 1, and has similar dialing procedures for dialing the ten-digit national telephone numbers, which consist of…

Why does Area codes 809, 829, and 849 matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Area codes 809, 829, and 849?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Area codes 809, 829, and 849.

Tags

  • Area codes in the Caribbean
  • Communications in the Dominican Republic
  • Dominican Republic communications-related lists
  • Fraud
  • Telecommunications-related introductions in 1958
  • Telecommunications-related introductions in 2005
  • Telecommunications-related introductions in 2009

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