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Telephone numbers in Thailand

Open-knowledge reference entry

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 15, 2026
Entity authorityQ6641568 ↗
Source-derived summary

Thailand's telephone numbering plan is managed by the National Broadcasting and Telecommunications Commission (NBTC) in accordance with International Telecommunication Union's (ITU) recommendation E.164.

Geographic area codes

Geographic (fixed line) area codes are, excluding the STD prefix, one digit in Bangkok and nearby provinces (area code 2) and two digits in all other provinces (area codes 3x, 4x, 5x, and 7x). In Thailand, an area code is usually shared by several provinces and roughly follows provincial borders.

Fixed-line subscriber numbers are six digits in Thailand (except Bangkok, Nonthaburi, Pathum Thani, and Samut Prakan, i.e., area code 2). Prior to 1980, subscriber numbers were six digits in Bangkok, Nonthaburi, Pathum Thani, and Samut Prakan. In 1980, subscriber numbers in these areas were expanded to seven digits in phases to meet new demands. The first digit of a subscriber number is associated with a specific locale within the area code. In Bangkok, Nonthaburi, Pathum Thani, and Samut Prakan, the second digit of a subscriber number identifies the service provider, which is almost always National Telecom (NT), as NT holds a near-monopoly of the Thai fixed-line market.

Thus, a full national number is 9 digits, including the STD prefix 0. When writing a telephone number with the area code, the area code and subscriber number are separated by a hyphen, also in the middle of subscriber number.

Editorial summary

“Telephone numbers in Thailand” enters the record as open-knowledge reference entry. Crown Archives preserves that source wording while asking what Telephone, numbers and Thailand can confirm, complicate or overturn.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1980—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Telephone, numbers and Thailand.
Editorial analysis

Why this record matters

“Telephone numbers in Thailand” is worth following because a concise public description often conceals a longer documentary argument. Here, Telephone, numbers and Thailand provides the most credible route into that argument.

Evidence profile

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 15, 2026. The linked authority identifier is Q6641568. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1980.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Telephone numbers in Thailand”, its source revision and the description used here.
  2. Expand the search: follow Telephone numbers in Thailand primary sources, Telephone numbers in Thailand archive and Telephone research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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  2. Which institution is responsible for the underlying evidence?
  3. What terminology or title could unlock a more precise catalogue search?
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Source & attribution

This entry incorporates text from “Telephone numbers in Thailand” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.