Microsoft Teams Phone Regex Builder & Tester

Build & test a rule

The two halves of every Teams normalization rule. Pattern is a JavaScript-compatible regex (.NET regex on Teams side, but the basic syntax overlaps for this use case). Translation uses $1, $2… backreferences to capture groups in the pattern.

Pattern e.g. ^0?(4\d{8})$

Translation use $1 $2 for capture groups

Test number(s) one per line

How Teams evaluates the dial plan Rules are matched top-to-bottom; the first matching pattern wins. Order matters — put narrow patterns (emergency, service numbers) above broad catch-alls (national, international). If no rule matches, the number is sent as-dialed which usually fails the carrier's translation.

ACMA rule library

Pre-built rules covering every class of number in the ACMA Numbering Plan. Click any card to load its pattern + translation into the builder above. These follow the canonical Teams Direct Routing convention: normalize to E.164 (+CC...) on the way out so the carrier accepts the call.

Order in Teams admin Recommended evaluation order when applying these to a dial plan: Emergency → Service Numbers (13/1300/1800/1900) → Satellite → Mobile → Geographic Local → Geographic National → International. The bottom-most rule should always be the international catch-all so an arbitrary 0011 + country code dial still translates.

Internal extension builder

Every organisation has a slightly different internal dial plan — 4-digit extensions, 5-digit extensions, site-prefix + extension, ranges reserved for hot desks, etc. Describe yours in the form below and the tool generates the matching pattern + translation. Click Load into tester to drop the generated rule into the builder above and test it against your own numbers.

Extension scheme

Digits total length of one extension

Min – Max digits

to

From – To inclusive numeric range

to

Allowed first digit(s) leave blank for "any 1–9"

Site / branch prefix optional fixed digits before the extension

Translation target

Base DID prefix in E.164. Extension digits become the suffix. For an extension 1234 with base +61298765, the rule produces +612987651234.

Custom translation use $1 for the captured extension (or $2 if you have a site prefix)

How the generator interprets your inputs Whatever you enter becomes anchored with ^…$ and the extension digits become capture group $1 (or $2 if there's a site prefix in front, in which case the prefix is $1 — useful when you want to route based on site). Leading digit lists like "2 3 4" become a character class [234]. An empty first-digit list defaults to "any 1–9" (so leading zero is excluded — extensions never start with 0).

Bulk number tester

Paste a list of dialed numbers; the tester runs each through the active rule set (the loaded recipes below — initially all ACMA defaults) and reports the first matching rule + the translated E.164 output. Use this to validate user dial patterns before a Direct Routing cutover.

Numbers one per line; whitespace and punctuation tolerated

Regex breakdown

Paste any normalization pattern; get a token-by-token plain-English explanation. Useful for inheriting somebody else's dial plan and reverse-engineering what it intended to match.

Pattern

Type a pattern above…

AU numbering reference

The Australian Communications and Media Authority (ACMA) maintains the Telecommunications Numbering Plan 2015. The table below summarises the classes that matter for a Teams Direct Routing dial plan.

Number classes (E.164 country code +61)

Class	National format	E.164 format	Length	Notes
Emergency	000 / 112 / 106	— (untranslated)	3	112 from mobile, 106 TTY. Never normalize to +61 — pass through verbatim.
Mobile	04xx / 05xx xxx xxx	+61 4xx / 5xx xxx xxx	10 → 11	ACMA allocates both 04 (primary PMTS) and 05 (newer PMTS) for mobile. Strip leading 0, prepend +61. The 05 range was added more recently and remains less common in the wild — include it for forward-compatibility.
Geographic NSW/ACT	02 xxxx xxxx	+61 2 xxxx xxxx	10 → 11	Local dial usually 8 digits inside Sydney/Canberra.
Geographic VIC/TAS	03 xxxx xxxx	+61 3 xxxx xxxx	10 → 11	Local 8 digits inside Melbourne/Hobart.
Geographic QLD	07 xxxx xxxx	+61 7 xxxx xxxx	10 → 11	Local 8 digits inside Brisbane.
Geographic WA/SA/NT	08 xxxx xxxx	+61 8 xxxx xxxx	10 → 11	Local 8 digits inside Perth/Adelaide/Darwin.
13 service	13 xx xx	+61 13xx xx	6 → 9	Local-call rate. 6 digits total.
1300 service	1300 xxx xxx	+61 1300 xxx xxx	10 → 13	Local-call rate.
1800 toll-free	1800 xxx xxx	+61 1800 xxx xxx	10 → 13	Caller pays nothing.
1900 premium	1900/1901 xxx xxx	+61 1900 xxx xxx	10 → 13	Premium rate — many enterprises block these at the SBC.
Satellite	0145 xxxxxx	+61 145 xxxxxx	10 → 12	Inmarsat / Globalstar. Less common.
International (out)	0011 + CC + number	+ CC + number	variable	Australia's IDD prefix is 0011. Strip it, prepend +.

Regex syntax cheat sheet

Token	Meaning	Example
^	Start of string	^04 matches "04…"
$	End of string	\d{4}$ matches "…1234"
\d	Any digit (0-9)	\d{8} = exactly 8 digits
{n}	Exactly n times	\d{6}
{n,m}	Between n and m times	\d{6,8}
?	Optional (0 or 1)	0?4 matches "04" or "4"
\|	Alternation (OR)	(13\|1300\|1800)
[abc]	Character class	[2378]\d{7}
[a-z]	Class range	[2-9]\d{7}
(...)	Capture group → $1, $2…	^0?(4\d{8})$ + +61$1
(?:...)	Non-capturing group	(?:0011\|\+)

References

ACMA Numbering Plan — official Australian numbering authority
MS Learn — What are dial plans? — Teams normalization rule reference
MS Learn — Translate phone numbers — examples by country
E.164 (Wikipedia) — the international PSTN number format Teams normalizes to

Microsoft Teams phone regex builder & tester

Build & test a rule

ACMA rule library

Internal extension builder

Bulk number tester

Regex breakdown

AU numbering reference

Number classes (E.164 country code +61)

Regex syntax cheat sheet

References