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Asia · +886

Taiwan phone number format

  • Country code +886
  • Trunk prefix 0

Reviewed by Sujan ThapaliyaLast updated

What does a Taiwan phone number look like?

8 or 9 digits after the trunk 0. Landlines are written +886 X XXXX XXXX and mobiles +886 9XX XXX XXX. In full international (E.164) format a Taiwan mobile is written +886912345678: the country code +886, with the national trunk prefix 0 removed, and no spaces or punctuation.
The anatomy of a Taiwan phone number under ITU-T E.164: country calling code 886, then the national destination code, then the subscriber number, to a maximum of fifteen digits after the plus. Nationally a Taiwan number is written +886 X XXXX XXXX with the trunk prefix 0; in E.164 the prefix and the spacing both come off.
National formatting is for people. E.164 is for databases, APIs, and caller ID — store Taiwan numbers in the right-hand form.

Format rules

Country code
+886
National number length
8 or 9 digits after the trunk 0
Trunk prefix
0
Used only domestically. Removed in international format.
Landline pattern
+886 X XXXX XXXX
Mobile pattern
+886 9XX XXX XXX

Examples

Taiwan phone number examples

These are format patterns showing digit grouping and prefix rules. They are examples of shape, not working numbers; do not use them to test a live call path.

TypeWritten domesticallyInternational (E.164)
Landline02 2345 6789+886223456789
Mobile09XX XXX XXX+886912345678

A quirk of Taiwan numbering

Every Taiwanese mobile number starts 09 domestically, which is +886 9 from abroad.

Validation

How to validate a Taiwan number

Validating a phone number is three separate checks, and conflating them is the usual source of bugs:

  1. Format: does it match the shape for Taiwan? 8 or 9 digits after the trunk 0, after the country code and with the 0 stripped.
  2. Allocation: is the prefix actually in use? A number can be the right length and still belong to an unallocated range.
  3. Reachability: is there a live subscriber? Only a carrier lookup (HLR or equivalent) answers that, and it is the only check that catches disconnected numbers.

For form validation, check format only and be permissive: accept spaces, dashes, brackets, and a leading 0 then normalise. Rejecting a real customer because they typed their own number the way they normally write it is a far more expensive error than storing one badly formatted row.

Store in E.164 (+886912345678) and format for display at render time. Storing the display format is how a database ends up with the same person recorded four different ways.

Format any number instantly

Paste a number into the free phone number formatter to convert it to E.164 and see whether it matches Taiwan’s format rules. No sign-up.

Frequently asked questions

What does a Taiwan phone number look like?
8 or 9 digits after the trunk 0. A landline is written +886 X XXXX XXXX and a mobile +886 9XX XXX XXX. In full international format that becomes +886912345678.
How do I write a Taiwan number in international format?
Start with +886, remove the leading 0 from the national number, then append the rest with no spaces or punctuation. +886 2 2345 6789 becomes +886223456789.
How many digits is a Taiwan phone number?
8 or 9 digits after the trunk 0.
How do I tell a Taiwan mobile from a landline?
By the prefix. Mobiles follow the pattern +886 9XX XXX XXX, while landlines follow +886 X XXXX XXXX.
Should I store phone numbers with the plus sign?
Yes. Store every number in E.164: leading +, country code, national number, no spaces or punctuation, up to 15 digits. It is the only format that is unambiguous internationally, and it is what makes deduplication work. Format for display, store canonical.

Sources

  1. ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.
  2. ITU-T International Numbering Resources — International Telecommunication UnionThe assignment of country calling codes and the published national numbering plans they belong to.

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