0 in Morse Code — Zero (— — — — —)

0 in Morse code is —————, written as -----. Like all Morse code numbers, it uses exactly five signals — no more, no less. This five-signal structure is the defining feature of the entire number system and the reason numbers are easy to learn as a complete set rather than ten separate memorisations.

The Complete Morse Number Pattern

All ten digits follow a strict mathematical pattern. Once you understand the rule, you can generate any Morse number instantly:

• 1–5 — start with dots. The number of leading dots equals the digit. 1 = ·————, 2 = ··———, 3 = ···——, 4 = ····—, 5 = ·····
• 6–9 and 0 — start with dashes. 6 = —····, 7 = ——···, 8 = ———··, 9 = ————·, 0 = —————

0 is in the dots-first (1–5) group. 0 starts with 0 dots followed by 5 dashes.

Why All Morse Numbers Use 5 Signals

Numbers in Morse code are longer than most letters by design. Letters range from 1 to 4 signals. Numbers are all 5. This length difference serves a practical purpose: when receiving Morse at speed, five-signal patterns stand out from letter patterns, making numbers easy to identify even before you decode which specific digit it is.

In the telegraph era, numbers appeared constantly in commercial messages — prices, quantities, dates, account numbers. The uniform 5-signal structure made numbers reliable to transmit and count. A telegraph operator knew immediately they were receiving a number (five signals) versus a letter (one to four signals).

All Ten Morse Numbers Together

Here is the complete set — viewing them together makes the pattern obvious:

The mirror symmetry between 1–4 and 9–6 is exact: 1 and 9 are each other's inverses (·———— vs ————·), as are 2 and 8, 3 and 7, 4 and 6. Only 5 (all dots) and 0 (all dashes) have no mirror partner.

Where 0 Appears in Real Morse Communication

Numbers are not optional knowledge for any serious Morse operator. They appear in:

• Amateur radio callsigns — every callsign contains a number. Callsigns containing 0 are assigned to operators in specific ITU regions worldwide.
• RST signal reports — every on-air contact begins with a Readability (1–5), Strength (1–9), Tone (1–9) report. A perfect signal report is 599 — Strength 9, Tone 9.
• Frequency coordination — when two stations agree to move frequencies, the numbers are sent in Morse.
• 73 and 88 — "best regards" and "love and kisses" are the most transmitted number sequences in Morse history. 73 is the standard farewell in every CW contact.

Practising Numbers — Best Approach

Learn all ten digits together after the alphabet is solid — typically after 2–3 weeks of daily letter practice. The pattern makes this achievable in a single focused session: once the dots-first / dashes-first rule clicks, all ten digits are derivable on the spot.

Practice sequence:

• Learn the pattern rule (not the individual codes)
• Practise your phone number in Morse using the Translator
• Practise today's date in Morse
• Drill random 4-digit sequences in the Practice mode
• Test recognition in the Quiz Level 6 (numbers only)

Zero — The Five-Dash Anchor

0 (—————) is five dashes — the maximum density of the Morse number system. It is the heaviest, slowest single-character pattern in the entire standard alphabet. There are no lighter signals, no dots to interrupt: just five sustained long signals in sequence. 0 anchors the number system at one end, with 5 (·····, five dots) anchoring the other. They are the two "pure" numbers — all of one signal type. Between them, every other digit is a mixture of dots and dashes in some combination. Once you know 0 and 5, you understand the extremes of the system.

In callsigns, 0 appears as the region identifier in many systems. US callsigns with 0 (W0, K0, N0) indicate the 10th call district, covering the central midwest. 0 appears in 10-metre frequency identifiers, in power measurements (100 watts = 1, 0, 0 in Morse), and in contest serial numbers (QSO number 100, 200, 300 etc).

Connecting 0 to Your Full Morse Number Knowledge

The Learn page covers numbers in Lessons 9–11. The Quiz Level 6 tests numbers specifically — 10 questions, all digits, 18 seconds per question. The Practice mode includes numbers in random rotation once you enable them.

Numbers in Morse are best learned as a system. Once the pattern rule is clear (dots for 1–5, dashes for 6–0), return to the Numbers in Morse Code overview for the complete picture of where numbers fit in real Morse communication.

Frequently Asked Questions

The Broader Morse Code System

Numbers are part of a complete Morse code system that covers 26 letters, 10 digits, and procedural signals. Numbers appear in every amateur radio callsign, in every RST signal report, in frequency identification, and in the two most culturally important sequences in CW: 73 (best regards) and 88 (love and kisses).

The number system is the final step in the learning curriculum. After completing the alphabet, most learners can add all 10 digits in a single focused session — the pattern makes this efficient. From there, the full character set is available and real Morse communication is practical.

Complete Learning Path

• Learn Morse Code — 12 lessons covering the full alphabet and numbers, audio-first
• Practice Mode — includes number drills alongside letter practice
• Quiz Level 6 — numbers-only timed test, 10 questions
• Translator — type any number sequence and hear it played
• Alphabet and Numbers Reference — all characters with audio
• Abbreviations — 73, 88, and all number-based conventions explained

Sending 0 and Receiving It at Speed

At 15 WPM, the digit 0 (-----) takes approximately 760ms to send — about 0.8 seconds. At 20 WPM, that drops to about 0.5 seconds. Because all numbers use exactly 5 signals, every digit takes the same amount of time to send as every other digit at any given WPM. This uniformity means number speed is easier to build than letter speed — there is only one duration pattern to master, not multiple.

The mirror of 0 is 5 (.....). 0 has dots leading to dashes; 5 is the opposite arrangement of the same signals (if 0 != 5 and 0 != 0 else "but there is no true mirror — it stands alone"). Training these together builds discrimination between the two halves of the number system.

In the Practice mode, number drills appear once numbers are enabled in settings. In the Quiz, Level 6 is numbers-only — 10 questions at 18 seconds each. When you can pass Level 6 with 80%+ accuracy, you can copy all 10 digits in real-time Morse communication.