Alphabet · International Morse Code · ITU Standard
Every letter A to Z with its dot-dash code, NATO phonetic alphabet, mnemonic, signal pattern, and audio. Includes mirror pairs, Koch learning order, and a full practice quiz — the complete alphabet reference.
The ITU international Morse code alphabet assigns every letter a unique sequence of dots and dashes from 1 signal (E, T) to 4 signals (B, C, F, H, J, L, P, Q, V, X, Y, Z). The most common English letters got the shortest codes — a deliberate design from Samuel Morse based on letter frequency in print. Filter by signal length or click any card to hear it.
| Letter | NATO Phonetic | Morse Code | Pattern | Signals | Play |
|---|---|---|---|---|---|
| A | Alpha | .- | 2 | ||
| B | Bravo | -... | 4 | ||
| C | Charlie | -.-. | 4 | ||
| D | Delta | -.. | 3 | ||
| E | Echo | . | 1 | ||
| F | Foxtrot | ..-. | 4 | ||
| G | Golf | --. | 3 | ||
| H | Hotel | .... | 4 | ||
| I | India | .. | 2 | ||
| J | Juliet | .--- | 4 | ||
| K | Kilo | -.- | 3 | ||
| L | Lima | .-.. | 4 | ||
| M | Mike | -- | 2 | ||
| N | November | -. | 2 | ||
| O | Oscar | --- | 3 | ||
| P | Papa | .--. | 4 | ||
| Q | Quebec | --.- | 4 | ||
| R | Romeo | .-. | 3 | ||
| S | Sierra | ... | 3 | ||
| T | Tango | - | 1 | ||
| U | Uniform | ..- | 3 | ||
| V | Victor | ...- | 4 | ||
| W | Whiskey | .-- | 3 | ||
| X | X-ray | -..- | 4 | ||
| Y | Yankee | -.-- | 4 | ||
| Z | Zulu | --.. | 4 |
Ten letter pairs in Morse are exact mirror images of each other — swap every dot for a dash and vice versa. Learn one side of each pair and the other is free. Click any pair card to hear both letters back-to-back.
The Koch method — developed by German psychologist Ludwig Koch in 1935 — is the most effective way to learn Morse. You learn at full target speed from the first lesson, starting with just two letters. Add one letter at a time once accuracy reaches 90%. This builds true ear recognition rather than conscious decoding.
| Step | Add Letter | Full Set So Far | Why This Order |
|---|---|---|---|
| 1 | K M | K M | Most distinctive sounds — dash-dot-dash and dash-dash |
| 2 | R | K M R | Symmetric dot-dash-dot — contrasts well with K and M |
| 3 | S | K M R S | Three dots — very distinct from dashes in K and M |
| 4 | U | K M R S U | Adds dot-dot-dash rhythm contrast |
| 5 | A P T | K M R S U A P T | Short common letters — builds core vocabulary fast |
| 6 | L | ...K M R S U A P T L | Common letter — adds 4-signal complexity |
| 7 | O | ...+ O | Three dashes — mirror of S, easy contrast |
| 8 | W I | ...+ W I | Short common letters complete the core set |
| 9 | N J E F | ...+ N J E F | Adds remaining short and medium letters |
| 10 | 0 Y V | ...+ 0 Y V | Introduces number 0 and remaining letters |
| 11 | G 5 / Q | ...+ G 5 / Q | Less common but important letters and symbols |
| 12 | Z H | ...+ Z H | Z and H complete the full alphabet |
| 13+ | Numbers + Punctuation | Full set | Add 0-9 and common punctuation to complete mastery |
Run training sessions at 15–20 WPM minimum — slower speeds encourage counting dots and dashes rather than hearing the letter as a sound. Most beginners plateau at 5 WPM because they start too slow. Start fast, accept imperfection, and accuracy builds naturally.
All 26 letters with mnemonic, tap pattern, sound, mirror pair note, and usage examples. Each section is directly linkable — e.g. /morse-code-alphabet/#azs-A.
1 dot · 1 dash · 2 signals · NATO: Alpha
Dot-dash — short then long. One of the most natural patterns to learn: a quick tap followed by a sustained tone. A is the mirror image of N (-.). In a QSO, "A" appears in almost every callsign. The prosign AA (.-.-) means new line in formal radiograms.
AlphaW1AWAA = new line prosign3 dots · 1 dash · 4 signals · NATO: Bravo
Dash-dot-dot-dot — one heavy thud then three quick taps. B is the mirror of V (...-): where V ends with a dash (Victory!), B starts with one. The number 8 shares a similar heavy-then-dots feeling at 5 signals (--...). BT (–···–) is the break prosign, and BK (-...-.-) invites a reply.
BravoBT = break prosignBK = invite reply2 dots · 2 dashes · 4 signals · NATO: Charlie
Dash-dot-dash-dot — alternating heavy-light, twice. C has the same rhythm as the word "CQ" which starts every calling sequence on ham radio. CQ itself is C then Q, two of the most recognisable letter sounds. The alternating pattern makes C impossible to confuse once learned.
CharlieCQ = general callCL = closing station2 dots · 1 dash · 3 signals · NATO: Delta
Dash-dot-dot — one thud then two quick taps. D is the mirror of U (..-): U ends with a dash, D starts with one. DE (-.. .) is the most used two-letter sequence in CW — meaning "from" or "this is" — always followed by a callsign. DN (-..-.) is the fraction bar prosign.
DeltaDE = from (this is)DN = fraction prosign1 dot · 0 dashes · 1 signals · NATO: Echo
A single dot — the shortest code in the entire Morse alphabet. E is the most common letter in English, so Samuel Morse gave it the simplest code. Its mirror T (-) is the second most common. Eight E's in a row (........) is the error prosign, sent to cancel a mistake. E appears in almost every English word.
EchoE = most common English letterEEEEEEEE = error prosign3 dots · 1 dash · 4 signals · NATO: Foxtrot
Dot-dot-dash-dot — two light taps, one heavy, one light. F is the mirror of Z (--..). The mnemonic: "di-di-dah-dit" or think "F-alling" — quick-quick-THUD-bounce. F country prefixes include France (F) and many Pacific island nations. The quotation mark (.-..−.) contains F's pattern inside.
FoxtrotF prefix = Francedi-di-dah-dit mnemonic1 dot · 2 dashes · 3 signals · NATO: Golf
Dash-dash-dot — two heavy tones then a light tap. G is the mirror of W (.--): W starts with a dot then two dashes, G starts with two dashes then a dot. QRG (your exact frequency) is one of the most important Q codes for frequency management. G prefixes include Great Britain (G, GM, GW, GI).
GolfQRG = exact frequencyG prefix = Great Britain4 dots · 0 dashes · 4 signals · NATO: Hotel
Four dots — the most dots of any letter in the alphabet. H is pure staccato: four rapid taps with no dashes. QTH (location) contains H as its final letter, and the four dots are unmistakable when heard at speed. The H sound at high WPM becomes a rapid flutter. Compare with 4 (....-) which is four dots then a dash.
HotelQTH = location code4 dots — fastest letter2 dots · 0 dashes · 2 signals · NATO: India
Two dots — quick-quick. I is the mirror of M (--): two dots versus two dashes. I and M are the first pair many beginners learn because their sounds are so distinct — I is light and quick, M is heavy and slow. "I" = two eyes, two dots. Common in callsign suffixes worldwide.
IndiaI prefix = ItalyCommon in suffixes: WB2I1 dot · 3 dashes · 4 signals · NATO: Juliet
Dot then three dashes — a quick start then a long sustained trio. J sounds like a quick knock followed by a slow triple knock. The apostrophe punctuation mark (.----.) has J's three dashes at its heart with dot bookends. J prefixes include Japan (JA, JH etc.) — one of the most active ham radio nations.
JulietJA prefix = JapanApostrophe contains J's pattern1 dot · 2 dashes · 3 signals · NATO: Kilo
Dash-dot-dash — the K prosign pattern. K alone means "go ahead, any station" — the most powerful invitation in CW. K is the mirror of R (.-.) — both are three-signal symmetric patterns. The Koch learning method starts with K and M because their sounds are maximally distinct. K prefixes dominate US callsigns.
KiloK = go ahead prosignK prefix = USA callsigns3 dots · 1 dash · 4 signals · NATO: Lima
Dot-dash-dot-dot — quick, long, quick, quick. L is the mirror of Q (--.-). The mnemonic: "di-dah-di-dit" — hear the long note in the middle. L is one of the letters in the Koch sequence added in the middle stages. The quotation mark (.-..−.) starts with L's pattern. Common in European callsign prefixes (LA, LU, LY).
LimaLA prefix = Norwaydi-dah-di-dit mnemonic0 dots · 2 dashes · 2 signals · NATO: Mike
Two dashes — slow and heavy. M is the mirror of I (..) and the first letter learned in the Koch method alongside K. The sound is unmistakable: two long tones. M is the second most common letter in CW abbreviations. DE is "from" and DE W1AW begins every ARRL W1AW bulletin transmission.
MikeM prefix = MexicoKoch Step 1 start letter1 dot · 1 dash · 2 signals · NATO: November
Dash-dot — heavy then quick. N is the mirror of A (.-). In CW abbreviations N means "no" or "negative." KN (-.--.): K plus N means "go ahead, named station only." The number 9 (----.) contains N's pattern as its final two elements. N prefixes include Norway (LA) and many other nations.
NovemberN = no / negativeKN = go ahead named station0 dots · 3 dashes · 3 signals · NATO: Oscar
Three dashes — long and sustained. O is the mirror of S (...). Together S and O form the heart of SOS: ...---... The number 0 (-----) is O extended to five dashes. O is the longest three-signal letter — pure dashes create a distinctive rumbling tone at speed that is instantly recognisable even in heavy QRM.
OscarSOS = ...---...0 = ----- (five dashes)2 dots · 2 dashes · 4 signals · NATO: Papa
Dot-dash-dash-dot — dot bookends around two dashes. P is a balanced, symmetric pattern. The mnemonic: "di-dah-dah-dit" — light, heavy, heavy, light. P shares the bookend family with X (-..-). P prefixes include the Philippines (DU), Poland (SP), and Portugal (CT). The period/full stop (.-.-.-) is six alternating signals starting similarly.
PapaSP prefix = PolandSymmetric dot bookend pattern1 dot · 3 dashes · 4 signals · NATO: Quebec
Dash-dash-dot-dash — two heavy, one light, one heavy. Q is the mirror of L (.-..). Every Q code — QTH, QSL, QRP, QRM and 54 others — begins with this letter. The pattern --.- is deeply associated with CQ (--.- -.-.) the universal calling signal. Q appears at the start of every Q-code transmission.
QuebecQ codes: QTH QSL QRP…CQ = Q is the second letter2 dots · 1 dash · 3 signals · NATO: Romeo
Dot-dash-dot — light, heavy, light. R is the mirror of K (-.-). The AR prosign (.−.−.) is two R's merged and means "end of message." In CW, "R" alone means "roger" — all received and understood. R is one of the first letters in the Koch learning sequence because its sound is so distinct and symmetric.
RomeoR = roger / receivedAR = end of message prosign3 dots · 0 dashes · 3 signals · NATO: Sierra
Three dots — rapid and light. S is the mirror of O (---). SOS (...---...) begins and ends with S. The AS prosign (.-...) means "wait" and starts with A then S. S is one of the easiest letters: three quick taps. At high speed S becomes a rapid trill distinctly lighter than O's heavy rumble.
SierraSOS = ...---...AS = wait prosign (.-...)0 dots · 1 dash · 1 signals · NATO: Tango
A single dash — one solid long tone. T is the mirror of E (.). Together E and T are the two shortest codes — single dot and single dash — because they are the two most common letters in English. T alone means "the" in some CW abbreviations. At speed, T is unmistakable: one sustained note.
TangoT = the (abbrev.)Single dash — simplest code2 dots · 1 dash · 3 signals · NATO: Uniform
Dot-dot-dash — quick-quick-LONG. U is the mirror of D (-..). The pattern feels like building momentum: two light taps then a landing. U appears in one of the most common CW abbreviations: UR (your), FB (fine business), and HR (here). In the Koch method U is added early in step 4.
UniformUR = your (abbrev.)U prefix = Ukraine3 dots · 1 dash · 4 signals · NATO: Victor
Three dots then a dash — the V for Victory signal. During World War II, the BBC began broadcasts with V in Morse (dit-dit-dit-dah) matching Beethoven's Fifth Symphony opening. V is the mirror of B (-...). The VA/SK prosign (..-.−.) which ends all contacts is built on V's three-dots-then-dash foundation.
VictorV for Victory (WWII)Beethoven's Fifth rhythm1 dot · 2 dashes · 3 signals · NATO: Whiskey
Dot-dash-dash — quick then two long. W is the mirror of G (--.). W prefixes dominate US amateur callsigns (W1, W2 … W9, WA, WB, WC, WD, WK, WN, WR, WS, WX). At speed W sounds like a quick knock then a double boom. W appears in CW abbreviations WX (weather), WPM (words per minute), and WKD (worked).
WhiskeyW prefix = USA (main)WX = weather, WPM = speed2 dots · 2 dashes · 4 signals · NATO: X-ray
Dash-dot-dot-dash — dash bookends around two dots. X is a symmetric bookend pattern: heavy, light, light, heavy. The DN prosign (fraction bar / slash) has the same structure. X is rare in English and therefore rarely heard in callsigns. The pattern is memorable because of its perfect symmetry — start and end the same way.
X-rayXE prefix = Mexico (also)Dash bookend = symmetric1 dot · 3 dashes · 4 signals · NATO: Yankee
Dash-dot-dash-dash — like K (-.-) with an extra dash at the end. Y is one of the heaviest-sounding letters: three dashes and one dot. In ham radio, YB is the prefix for Indonesia (the world's fourth most populous country). The pattern's weight makes it sound distinctive and authoritative at speed.
YankeeYB prefix = IndonesiaK extended: -.- becomes -.--2 dots · 2 dashes · 4 signals · NATO: Zulu
Dash-dash-dot-dot — two heavy then two light. Z is the mirror of F (..-.). "Zulu time" means UTC — Z is the military and aviation abbreviation for Coordinated Universal Time, which is why radio operators worldwide say "1430 Zulu" instead of "14:30 UTC." ZL is the prefix for New Zealand.
ZuluZ = Zulu time (UTC)ZL prefix = New ZealandType any text and hear it in Morse instantly. Supports all letters, numbers, and punctuation.
Hear a random letter in Morse and type it. Trains your ear for the Koch method — start at 15 WPM minimum.
Test both directions: letter → Morse and Morse → letter. Start with the Koch Tier 1 letters before tackling all 26.
The alphabet is the foundation. Explore the full Morse system: