Phone Number Length — Every Published Length

Phone number length is not trivia — it is a design decision, because length is exactly what customers have to remember or misremember. This page lists every published length in the inbound family, digit by digit and letter by letter, with what each length buys.

The published lengths

Format	Digits	Structure	Word length
1300 number	10	1300 prefix + six-digit tail	Up to 6 letters
1800 number	10	1800 prefix + six-digit tail	Up to 6 letters
13 number	6	Standalone six digits	Up to 4 letters

The published FAQ notes 13 numbers are typically used by larger national companies; 13 plans do not appear on the pricing page, so 13 length is easy to admire and harder to price — ask the team on 1300 327 934.

What each length buys

Six digits (13): the shortest diallable contact point in the family — maximum brevity, and the published word limit drops to four letters to fit.
Ten digits (1300/1800): the standard business formats, with the six-digit tail carrying up to six letters of word and the caller arrangement of your choice — shared cost on 1300, caller-free in the stated Australian 1800-number context on 1800.
The tail alone (six digits): what the search works on — which is why "length" questions often hide "availability" questions.

Why length is a design decision

Because the caller experiences the number as a length before a meaning: six digits are remembered after one hearing, ten digits need reinforcement — which is exactly what a word provides. A ten-digit 1300 number with a word is easier to recall than a bare ten-digit number, because the word compresses the tail. Length sets the problem; the word is one published solution to it.

Length as a typo detector

Every published length doubles as a validation rule: a 1300 or 1800 number is exactly ten digits, a 13 number exactly six, and a word tail exactly the digits its letters map to. Checking any number you are given against the length table catches transpositions, truncations and missing digits in seconds — the cheapest quality control in the whole process, and the reason format pages matter even to buyers who think they only care about the word.

What length does not decide

Geography — no inbound length carries area-code meaning, and no coverage claims are published. Price — the plan floors are the same across 1300 and 1800 lengths (from $10 per month); only the word component moves the bill. And quality — length has no published relationship to outcomes.

Related reading: what Australian numbers start with, worked format examples, or the 1300 numbers overview.

Length questions

Are all 1300 tails exactly six digits?

Yes — that is the published structure, and the search tool works on exactly those six. A different count is a typo, not a variant.

Why is the 13 word limit shorter?

It follows the digit count: a 13 number has four digits after the prefix, so it carries four letters. Length and word capacity move together by design.

Is a shorter number always better?

Shorter is easier to dial and remember — and rarer to obtain, with the published FAQ associating 13 numbers with larger national companies. Fit the length to the surfaces, not the other way round.

Does length affect the price?

The 1300 and 1800 plan floors are identical at $10 per month; the word component starts from $40 per month on either. Length changes the format, not the price table.