Ham Radio 73 Meaning + Q Codes: 2026 CW Cheat Sheet

By the Learn Morsy Content Team · Reviewed by Enes Vural (Morsy founder) · Published July 27, 2026 · Verified against ITU-R M.1677-1 (2009) and ARRL Amateur Radio operating standards

Ham radio CW has its own compressed vocabulary. Numbers that carry phrases, three-letter codes that stand in for whole sentences, prosigns that punctuate a contact. Every one of these shortcuts exists because sending long text at 5-30 words per minute is slow, and cutting a phrase to 3-4 symbols is the difference between a workable QSO and a broken one.

Here’s what 73, 88, and the number codes actually mean, the Q-code system every ham should know, the prosigns that structure real on-air contacts, and the five rookie mistakes that mark a beginner from a mile away.

What do 73, 88, 55, 33, and 44 mean in ham radio?

The number codes come from the 1859 Western Union phillips code list, a shorthand system developed by telegraph operators to compress common phrases into single or double digits. In 2026, most of that list is dead, but a handful survived because they’re short, unambiguous, and useful. 73 is by far the most common: it means best regards, and it’s the standard sign-off on virtually every ham CW contact worldwide.

Getting 73 and 88 right is one of the fastest ways to sound like you belong on the air. Send 88 to someone you just met and you’ll get a puzzled reply. Send 73 to everyone by default. Our Morse code numbers post covers the 5NN cut-number and other digit shortcuts in more detail.

What are Q codes and why do ham operators use them?

Q-codes are three-letter shortcuts starting with Q that each carry a complete phrase or question. The system was adopted at the 1912 International Radiotelegraph Convention in London to standardise ship-to-shore telegraph traffic across language barriers. A German operator sends QSY 7050 and a Japanese operator immediately understands: change frequency to 7050 kHz.

The ITU maintains about 100 Q-codes across amateur, aeronautical, and maritime services. In practice, hams use about 20 of them regularly. The rest are historical curiosities or specialised for specific services. In 2009, the ITU published Recommendation M.1677-1, which formalised the timing and symbol rules that every Q-code still follows on modern CW.

Every Q-code has two forms: statement (sending information) and question (requesting it). QRZ? means “who is calling me?” while QRZ (no question mark) means “you are being called by…”. Context and inflection tell the receiver which is meant. Written in text, the question mark is added when explicit clarity matters.

What are the top 20 Q codes ham operators actually use?

The ARRL Q-signals page lists the full active set, but 20 codes cover roughly 95% of on-air CW use. We’ve grouped them by frequency of appearance in the QSOs we’ve logged over the past year.

Some of these come up hundreds of times per contest, others once a year. Which ones you memorise first depends on what you plan to do. Ragchewers (long conversational contacts) drill QTH, QRA, QSO, QRM, QSB, QSY. Contesters live on QRZ, QSL, QSY, and the RST cut-number 5NN.

Our finding: Across the past 6 months of Morsy user data, the five most-looked-up Q-codes are QRZ, QSL, QRM, QRP, and QTH. These five alone cover about 62% of Q-code lookups in the app, which matches the observed distribution on real ham CW bands.

What are prosigns and when do you use them?

Prosigns are Morse code procedural signals sent as one run-together shape with no letter gap between the component letters. They punctuate a CW contact the way commas, periods, and paragraph breaks punctuate written text. The ITU standard from 2009 formalises the timing and defines the recognised prosign set.

Sending prosigns with a letter gap between the components turns them into two separate letters. AR sent with proper prosign timing is one continuous 5-symbol shape. A R sent with a letter gap is the letters A and R and means nothing on the air. This is exactly the same run-together rule that makes SOS a distress signal instead of the letters S O S. See our timing rules post for the full mechanic and our SOS post for the historical example.

Our finding: The most-confused prosign among Morsy users is KN versus K. KN (— · — — ·) restricts the reply to the named station only. K (— · —) invites any station to reply. Getting these two mixed up causes DX pileup chaos. About 34% of Morsy learners initially reverse them.

How is CW signal reporting (RST) actually done?

RST is a three-digit report: Readability 1-5, Strength 1-9, Tone 1-9. 599 is the friendliest and most common report on CW. In contest CW, operators send it as cut numbers: 5NN. The 5 stays, the two 9s become N (— ·), saving 66% of the send time. Only used in contests where the receiver knows to expect an RST field.

• Readability measures how clearly you can copy the sender. 1 = unreadable, 5 = perfectly readable.
• Strength measures the signal power at your receiver. 1 = barely perceptible, 9 = extremely strong.
• Tone measures the CW note quality. 1 = extremely rough, 9 = pure sine wave. Almost every modern rig sends a 9 by default.

In practice, most operators send 599 (or 5NN in contests) regardless of actual conditions, unless the signal is genuinely poor. This isn’t dishonest so much as a friendly convention. Real signal quality reporting happens in ragchew QSOs where operators want to help each other tune. Details in our complete Morse learning guide and the numbers-specific post at morse code numbers.

What common CW phrases should every ham know?

Beyond Q-codes and prosigns, hams use a set of short English abbreviations that show up in almost every CW contact. Learning these 15 or so phrases makes real contacts readable within your first month on the air.

• CQ CQ DE — general call: “calling any station, this is…”
• PSE — please
• TU — thank you
• GM / GA / GE / GN — good morning / afternoon / evening / night
• GL — good luck (contest sign-off)
• OM / YL — old man / young lady (any male / female operator)
• ES — and (from Latin et)
• HR — here
• UR — your
• WX — weather
• RIG — radio equipment
• ANT — antenna
• HW? — how do you copy?
• HI HI — laughter (like “haha”)
• FB — fine business (excellent)

A typical QSO opening: “CQ CQ DE W1XYZ K” → “W1XYZ DE K3LR K” → “GM OM UR RST 599 5NN QTH BOSTON MA HW?” → and so on. Ten minutes of listening to real CW traffic on 40m or 20m and you’ll hear these phrases repeatedly. Our CW trainer guide covers the 6-week ham CW curriculum that layers these into daily Koch practice.

Casual QSO codes versus contest CW: what’s the difference?

Casual QSOs (ragchews) sound friendly. Full call signs, RST honestly given, name and QTH exchanged, weather chat, maybe rig details, followed by 73 SK. Runs 5-30 minutes. Every phrase gets sent in full or with widely-recognised shortcuts.

Contest CW sounds like machine-gun fire. Call sign, 5NN, exchange field (state, serial number, or zone), TU, next station. Runs 10-20 seconds per contact. Every symbol removed adds one more QSO per hour, and top contesters chase 200+ QSOs per hour on the big weekends.

The CWops CW Academy teaches both formats separately because the operating rhythm and code selection genuinely differ. Ragchew ops use QRA, QTH, QRM, QSB. Contest ops barely use anything beyond RST, exchange, and QSL. Learning both is what makes a well-rounded CW operator. Our Morse chart has the full prosign reference sheet if you want a printable version to keep next to your rig.

Five rookie mistakes to avoid on ham CW

Every new CW operator makes at least two of these in their first month. Knowing them ahead of time saves the embarrassment.

Sending 88 to a stranger. 88 is intimate. Reserve it for your spouse, close family, or your regular skeds. To a random operator, use 73.

Sending KN when you mean K. KN restricts the reply to a specific station. If you’re calling CQ or handing off in a group, K is what you want. Getting this wrong invites pileups when you didn’t want them.

Missing the letter gap on prosigns. AR sent with a letter gap becomes A R and means nothing. Prosigns are one continuous shape, no internal gap. Practice with our decoder tool to verify.

Full RST when 5NN is expected. In contests, sending 599 instead of 5NN wastes symbols and marks you as new to the format. In ragchews, the reverse is true: 5NN sounds cold, send 599 or an honest report.

Sending too fast for the receiver. Nothing marks a beginner faster than QRQ (send faster) when the other operator just sent QRS (send more slowly). Match the sender’s speed on their reply, don’t crank the WPM to show off.

Wondering what “sounding professional” on CW even means? It’s not fluency, it’s rhythm. Steady, correct-ratio, well-spaced sending at 15 WPM beats sloppy sending at 30 WPM every time. Our Koch method guide covers how to build that rhythm from day one, and our international Morse post covers the ITU standard that defines what “correct” actually means.

Try these codes right now

Open our Morse translator at 15 WPM. Type this sample contact and hit Play:

CQ CQ DE W1XYZ K → wait → W1XYZ DE K3LR 5NN OH TU 73 SK

That’s a full contest exchange in under 30 seconds of audio. If you can hear the individual codes emerging from the rhythm, you’re ready to start listening to real ham CW on 40m or 20m. If not, cover the alphabet first with our 21-day 10-minutes-a-day plan and come back once you can copy plain text at 15 WPM.

FAQ

What does 73 mean in ham radio?

73 means best regards. It’s the standard friendly sign-off between ham operators on CW, voice, and digital modes. The code traces back to the 1859 Western Union telegraph phillips-code list where number codes carried common phrases. 73 was #92 for best regards and it’s the only number code from that list still in daily use worldwide.

What does 88 mean in ham radio?

88 means love and kisses. Like 73, it comes from the 1859 Western Union phillips code list. Operators use 88 with close friends, family members, or a partner. Sending 88 to a stranger on the air is considered forward. The convention is universal: 73 for anyone, 88 only when there’s a personal relationship.

What are Q codes in ham radio?

Q-codes are three-letter shortcuts starting with Q that carry a full phrase. They were adopted at the 1912 International Radiotelegraph Convention and remain in daily use in 2026. Examples: QRZ (who is calling me), QSL (I acknowledge receipt), QRM (interference from other stations), QRP (low power). About 20 Q-codes cover 95% of actual on-air use.

What does 5NN mean in a contest QSO?

5NN is the cut-number version of RST signal report 599. 5 stays as itself, N replaces 9. The full report becomes three symbols instead of nine dits and eight dahs. Contest operators exchange 5NN thousands of times per weekend, so the ~66% symbol saving compounds fast. Only used in contest CW context.

What is the difference between 73 and 88?

73 means best regards, appropriate for any operator. 88 means love and kisses, appropriate only for someone you know personally (spouse, family, close friend). Sending 88 to a stranger comes across as odd or forward. Both codes date to the 1859 Western Union phillips code list and both survived because they’re short and unambiguous.

What is the prosign AR in Morse code?

AR (dit-dah-dit-dah-dit) means end of message. It’s sent as one run-together shape with no letter gap between the A and R. Used at the end of a full transmission when you’re ready for the other operator to reply. Roughly 95% of ham CW contacts include AR before the final signoff prosign SK.

How do I learn ham radio Q codes fast?

Start with the top 5: QRZ, QSL, QRM, QRP, QTH. These cover most casual QSOs. Add 5 more per week: QSY, QSB, QRT, QRO, QSO. In 4 weeks you’ll know 20 Q-codes plus the prosigns AR, SK, KN. Our CW trainer guide walks the exact 6-week ham CW curriculum that layers Q-code drills onto Koch method practice.

Sources

• ITU, Recommendation ITU-R M.1677-1: International Morse code, 2009. Retrieved 2026-07-27 from https://www.itu.int/rec/R-REC-M.1677-1-200910-I/
• ARRL, Q Signals: An Amateur Radio Operating Aid, 2025. Retrieved 2026-07-27 from https://www.arrl.org/q-signals
• Wikipedia contributors, Q code, 2026. Retrieved 2026-07-27 from https://en.wikipedia.org/wiki/Q_code
• CWops, CW Academy syllabus and cohort structure, 2025. Retrieved 2026-07-27 from https://cwops.org/cw-academy/
• Western Union / Phillips Code, original 1859 telegraph shorthand list (historical reference for 73, 88, 55 origin)
• International Radiotelegraph Convention, London 1912 (Q-code system adoption)
• Morsy internal usage data, 6-month window ending 2026-07-27 (Q-code lookup frequency, prosign confusion rates)