computer science

International Networks (country code)

International Networks (country code) is a computer 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 International Networks (country code) rather than just read about it. In short: International Networks is the name given by the International Telecommunication Union (ITU) to country calling codes +882 and +883, and serves as a catch-all for telephone services not dedicated to a single country. Satellite telephone carriers, especially those with worldwide service, are allocated within the Global Mobile Satellite System (GMSS), country code +881, with the exception of non-terrestrial Inmarsat, c…

Key takeaways

International Networks (country code) belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect International Networks (country code) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of International Networks (country code) from memory before moving on to harder problems.

Reference excerpt

International Networks is the name given by the International Telecommunication Union (ITU) to country calling codes +882 and +883, and serves as a catch-all for telephone services not dedicated to a single country. Satellite telephone carriers, especially those with worldwide service, are allocated within the Global Mobile Satellite System (GMSS), country code +881, with the exception of non-terrestrial Inmarsat, country code 870. As in the other such shared country codes, carriers are allocated number space within this code space plus their identification code (two-digit number in 882 code space, three or four digit number in 883 code space). The phone number for a subscriber of such a service starts with +882/+883 followed by the carrier code. The cost to call such a number can be high; for example in the British Telecom price list rates for various 882 and 883 numbers ranged from £0.60 to £4.50 per minute.

Carrier codes As of November 27, 2017 the assignments of +882/+883 carrier codes are as follows:

Active

In the +882-99 block, two numbering spaces collide: The numbering area has officially been assigned to Telenor but prior to this assignment, e164.org started to assign unofficial numbers within that numbering area.

Inactive The following codes were previously assigned by the ITU but were not used as of 2007:

References

External links Current ITU-T list of E.164 shared country codes in the 881, 882 and 883 range List of ITU-T E.164 assigned country codes as of 2016 iNum OFFICIAL Website World Telephone Numbering Guide: Special Services

Worked examples

Example 1 — a first encounter with International Networks (country code)

Start with the simplest possible case. Write down what International Networks (country code) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer 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 International Networks (country code) 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 International Networks (country code) 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 International Networks (country code)

In research: International Networks (country code) appears in computer 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 International Networks (country code) 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: International Networks (country code) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Country codes, so understanding it makes those chapters shorter.
In everyday life: Look for International Networks (country code) 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 International Networks (country code) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what International Networks (country code) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain International Networks (country code) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is International Networks (country code) in simple terms?

Why does International Networks (country code) matter?

Because it connects several computer 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 International Networks (country code)?

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 International Networks (country code).