Morse Code Numbers: 0-9 Chart, Cut Numbers, Ham 73

Built by Enes Vural · Published July 22, 2026 · Verified against ITU-R M.1677-1 (2009)

Learning the Morse code letters first is the norm. Numbers usually come second, and most people expect them to be harder. They are actually easier. Every digit follows a single shifting pattern, so you can derive any number from any other one in your head. Once you see the pattern, you never forget the chart.

Here is the full Morse code numbers table, the pattern that makes them stick, the ham-radio “cut number” shortcuts you will hear on the air, and the traditional number codes (73, 88, 5NN) that carry meaning beyond the digits themselves.

Morse code numbers 0 to 9 chart

Every digit uses exactly five symbols per ITU-R Recommendation M.1677-1 (2009). The pattern shifts one position per digit, which is the whole trick to remembering them.

Compare this to the letter table on our Morse code chart. Numbers are longer than letters (every digit is 5 symbols, while common letters like E and T are one symbol each), which is why numbers slow down real messages. It is also why operators developed cut numbers, covered below.

The one-symbol-per-position pattern

Here is the pattern most people never notice. Look at digits 1 through 5:

• 1: one dit, then four dahs
• 2: two dits, then three dahs
• 3: three dits, then two dahs
• 4: four dits, then one dah
• 5: five dits, zero dahs

The number of leading dits matches the digit value up to 5, and the trailing dahs fill the remaining slots. At 5 you have all dits.

Then from 6 to 0 the pattern reverses:

• 6: one dah, then four dits
• 7: two dahs, then three dits
• 8: three dahs, then two dits
• 9: four dahs, then one dit
• 0: five dahs, zero dits

Starting at 6, the number of leading dahs equals digit − 5. So 6 has one dah (6−5), 7 has two (7−5), 8 has three, 9 has four, 0 (treated as ten) has five.

Learn this rule once and you can derive any digit from scratch. You never memorize 10 separate patterns. When I introduce numbers to Morsy learners, I show them 1 and 5 first, then let them figure out 2, 3, 4 by extending the pattern themselves. Nine times out of ten they can do it without a hint.

What are cut numbers in Morse code

Cut numbers are ham radio shortcuts. Instead of sending the full five-symbol digit, operators substitute a shorter letter whose pattern approximates the digit. This saves significant time in fast-paced contest CW where the same numbers are exchanged thousands of times per weekend.

The most common cut numbers you will hear are T (0), A (1), N (9), and E (5). Sending a call sign like “W3EEE” instead of “W3555” is standard practice in the annual ARRL DX contest and CQ World Wide.

The tradeoff is unambiguity. A cut number can be mistaken for the actual letter if the sender did not signal it was a number. Contest operators handle this through context: the exchange format is fixed (call sign, then RST report, then serial number or state), so a listener knows where numbers must appear. In casual QSO or emergency traffic, always send full digits.

Ham radio number codes: 73, 88, 55, 5NN

Not every Morse number is a literal digit. Ham radio inherited a set of two-digit codes from the 19th-century Western Union telegraph code list, and a few survived into modern practice. The full history is documented in the Wikipedia Q-code article, which covers both Q-codes and the older number-code tradition.

Sending “73” as a sign-off is universal in ham radio Morse. Sending “88” implies a level of intimacy that would be strange between strangers. Operators who know each other well use 88 with their spouses. Everyone else uses 73. Getting this wrong is a rookie tell.

For learners, the ARRL learning-Morse-code resources list a broader set of Q-codes and number codes worth knowing before your first on-air QSO. For basics, our Morse code timing rules post covers how to send prosigns like 73 without an internal letter gap.

Digit versus cut number: when to use which

Cut numbers save time. Full digits stay unambiguous. The decision comes down to context.

Use full digits when:

• Sending emergency traffic. Never abbreviate anything in an SOS or QRR (emergency) transmission.
• Any casual QSO where the person you are talking to may not be a contest regular.
• Numbers in a mixed context (a call sign that happens to contain digits, an address, a phone number).
• Any time the receiver has to write down the number without knowing in advance what it will be.

Use cut numbers when:

• Contest CW where speed matters and the exchange format is known in advance.
• The RST signal report field, where 599 is nearly always the value and shortening to 5NN saves 12 symbols.
• Serial number exchanges in contests where three-digit numbers get exchanged hundreds of times per hour.

A good rule of thumb: if the receiver could not guess what number is coming, send it in full. If the receiver already knows the format and just needs the value, cut numbers are fair game. Our Morse decoder guide has more on why decoders struggle with cut-number exchanges when they lack context.

Sending numbers on a straight key vs paddle

Sending numbers is where beginner fists fall apart, and I have watched it happen dozens of times in Morsy user testing. The reason is that numbers require a long, uninterrupted sequence of the same symbol type (five dahs for 0, five dits for 5), and holding perfect timing across five identical symbols is hard.

On a straight key (up-down lever), the challenge is spacing dahs consistently. A common error is speeding up as you go, so 5 dahs sound like 4.5. Practice with a metronome at 60 BPM, one dit per beat, and force each dah to occupy exactly 3 beats. Sending 0 should take 15 beats plus 4 inter-symbol gaps of 1 beat each: 19 beats total. Slow, but correct.

On an iambic paddle (side-to-side lever with auto-repeat), consistency comes free because the electronics repeat perfect dits or perfect dahs at your set speed. The challenge shifts to hitting the right paddle for the right count. Muscle memory usually kicks in after a few dozen sends. Contest ops often practice sending 5NN thousands of times as a warm-up drill for exactly this reason.

Either way, record yourself and feed the audio into our Morse translator’s decoder mode to check what you actually sent. Our complete Morse learning guide covers the full send-and-verify practice loop.

Common number errors and how to fix them

5 confused with H. H is four dits (····), 5 is five dits (·····). At high WPM the difference is one dit-length, which is under 100 ms at 15 WPM. Fix: count in your head as you send, and when receiving, use context (numbers appear where the exchange format expects them).

0 confused with T. 0 is five dahs (—————), T is a single dah (—). If letter gaps get compressed, 0 can sound like TTTTT run together, which reads as a garbage sequence. Fix: leave a clear letter gap after every digit and never send 0 near another dah-heavy letter without a full 3-unit break.

6 confused with B. 6 is dah-dit-dit-dit-dit (—····), B is dah-dit-dit-dit (—···). Same relationship as 5 versus H, one extra dit. Fix: same context strategy, use the position in the message to disambiguate.

Cut-number confusion. New listeners sometimes hear “5NN” and copy “ENN” (thinking E is a letter). Fix: know the contest exchange format in advance. In CQ World Wide, RST comes right after the call sign, so E in that slot is always cut-5.

Running dashes together. Sending 8 (———··) with rushed timing can sound like O (———) followed by I (··). Fix: metronome practice at slow speed, then gradually increase. Our Koch method guide covers the audio drill approach.

A practice drill for Morse numbers

Here is the drill I recommend to Morsy users learning contest-style number exchange:

1. Open our Morse translator at 15 WPM, standard timing.
2. Type a random 3-digit number (say 247) and hit Play. Listen twice.
3. On paper or in a text field, write the digits you heard.
4. Compare to the typed input.
5. Repeat with a different number.

Do 20 rounds daily for a week. Add three-digit numbers with cut-number substitutions (2A7, EAV) once the standard versions are stable. By day 10 you can copy a contest exchange in real time.

For a longer plan that includes numbers in the weekly progression, see our 21-day Morse learning plan and our realistic timeline for how long Morse takes.

FAQ

What is the Morse code for numbers 0 to 9?

Every digit uses five symbols following a shifting pattern. 1 is one dit and four dahs. 2 is two dits and three dahs. This continues to 5, which is five dits. Then 6 is one dah and four dits, and the count reverses. 0 is five dahs. The pattern is fully symmetrical around 5 and per ITU-R M.1677-1 (2009).

What are cut numbers in Morse code?

Cut numbers are abbreviated Morse digits used by ham radio operators to save time in contests. T replaces 0, A replaces 1, N replaces 9, E replaces 5, and U replaces 2. A cut number is 1-3 symbols instead of 5, so a full RST report drops from 15 symbols to as few as 4.

What does 73 mean in Morse code?

73 is a ham radio prosign meaning best regards. It is sent at the end of a Morse contact as a friendly sign-off. The origin dates to 1859 in the Western Union telegraph code list, where number codes were shorthand for common phrases. 73 survived when most of that list was dropped.

What does 88 mean in Morse code?

88 means love and kisses in ham radio Morse. Like 73, it comes from the 19th-century Western Union code list. Operators use 88 with close friends and family members, or at the end of a QSO with a partner. Sending 88 to someone you just met on the air is considered forward.

What is a 5NN signal report?

5NN is the cut-number version of the 599 RST signal report used in most CW contests. 5 stays as itself, N replaces 9. The full report becomes three symbols instead of nine dits and eight dahs. Contesters exchange 5NN thousands of times per weekend so the saving is significant.

How do I remember Morse code numbers?

Use the shift pattern. Start at 1 which is one dit and four dahs. Each subsequent digit swaps one dah for one dit, so 2 becomes two dits and three dahs. At 5 you have all dits. At 6 the count reverses with one dah and four dits, and it climbs back. 0 is all dahs. Learn the pattern once and you never need to memorize the digits individually.

What is the difference between digits and cut numbers?

Digits are the full ITU Morse patterns for 0-9, each 5 symbols long, used in all non-contest contexts. Cut numbers are 1-3 symbol replacements used only in ham radio contest CW where speed matters more than the small ambiguity risk. Outside contests, always send full digits.