Ten codes — the “10-4,” “10-20” shorthand familiar from radio communication — have been part of security and law enforcement communication for decades. They carry an aura of professional authenticity. They also create significant practical confusion because there is no universal standard for what most of them mean, and their relevance in different security contexts varies considerably.

Before investing time in memorizing a list of codes, it helps to understand what ten codes actually are, where they work well, where they are overused, and what the foundation of genuinely effective security communication actually looks like.

The Origin and Purpose of Ten Codes

Ten codes originated in American law enforcement radio communication in the 1930s. Radio technology of that era had specific limitations: transmissions were often unclear, channels were shared and busy, and verbal communication under operational pressure was prone to misunderstanding.

Standardized numerical codes solved several problems simultaneously. Short codes replaced longer phrases, reducing transmission time and channel congestion. Standardized meanings reduced ambiguity under pressure. The prefix “10” before each number indicated that a coded message was beginning rather than free-form speech.

The system worked well within organizations that established their own standard code sets and trained all users consistently. The problem — and the source of much of the confusion that persists today — is that the codes were never internationally standardized. Different agencies, different organizations, and different countries developed their own variations. A code that means one thing in one context may mean something different in another.

Commonly Referenced Codes in Security Contexts

Because there is no universal standard, the following represents widely referenced codes across the security and law enforcement communication tradition. Individual companies establish their own code sets in their communication protocols — always verify the specific codes your employer uses rather than assuming transferred meaning.

10-1 — Poor radio signal or reception. A request for the previous transmission to be repeated more clearly.

10-2 — Good signal or reception confirmed.

10-4 — Acknowledged. Message received and understood. Among the most universally recognized radio codes, used widely across security, emergency services, and public communication contexts.

10-6 — Busy or occupied. The recipient cannot respond immediately; stand by.

10-7 — Out of service or temporarily unavailable.

10-8 — In service and available.

10-9 — Repeat the previous transmission. Used when a message was unclear or not received.

10-20 — Location. Used as a request or statement of current position. “What is your 10-20?” means “Where are you currently?”

10-21 — Contact by telephone. A direction to switch from radio to phone communication.

10-33 — Emergency. One of the most consistently used codes across different systems — a universal alert that an emergency situation exists requiring immediate response. Many organizations retain this code even when they have otherwise moved away from ten code systems, because its meaning has become sufficiently widely understood to serve as a reliable emergency signal.

10-99 — Assignment completed or situation resolved, depending on the specific organization’s code set.

How Ten Codes Are Used in Saudi Arabia’s Security Sector

The use of ten codes in Saudi Arabia’s private security sector is not uniform across the market. Their presence in any specific deployment depends on the company’s communication protocols, the type of deployment, and the radio infrastructure being used.

Larger operations — security control rooms managing multiple guards across extended sites, patrol operations covering industrial compounds or major facilities, event security coordinating teams across a large venue — are more likely to have established communication protocols that include coded shorthand. The volume and urgency of communication in these contexts makes brevity tools genuinely useful.

Smaller deployments — a single guard at a corporate entrance communicating check-ins with a supervisor by phone or radio — typically do not use formal ten code systems. The communication needs are simple enough that plain language serves better.

The multilingual reality of Saudi Arabia’s security workforce adds a specific consideration. A code system that works efficiently when all users share the same language and training background creates confusion when users have different first languages and have been trained on different code sets. Many professional companies in Saudi Arabia use plain language as their primary communication standard precisely because it functions more reliably across a diverse workforce than coded shorthand.

What Genuinely Effective Security Communication Requires

The ten code framework was designed to solve specific problems: brevity, clarity, and standardization under operational pressure. These are the right problems to solve. The question is whether coded shorthand is the best solution in every context.

In practice, the communications that matter most in security work are not the routine status checks where ten codes shine. They are the incident descriptions, the location clarifications, the situation assessments, and the coordination with external emergency services that require precise language rather than shorthand.

A guard who can only communicate via codes faces a limitation when the situation requires describing something that does not fit a code — and most significant incidents involve exactly this kind of novel description. The guard who can communicate clearly, calmly, and specifically in plain language across radio, phone, and written report is more valuable than one who has memorized a list of codes but struggles with free-form professional communication.

The practical conclusion: learn your specific employer’s code set, understand why codes exist and when they serve their purpose, and invest equally or more heavily in clear, professional plain language communication.

For Businesses Evaluating Security Provider Communication Standards

The communication infrastructure a security company uses is worth examining when evaluating a provider. Ask specifically: what communication systems do deployed guards use, how are incidents reported in real time, and what is the escalation procedure when a guard needs immediate support or when a situation exceeds their authority?

The answers reveal whether communication has been thought through as an operational function or treated as an afterthought. Companies with clear communication protocols — including how guards contact supervisors, how supervisors communicate with control rooms, and how clients receive real-time notification of significant events — are companies that have invested in the infrastructure that makes security responsive rather than merely present.

Frequently Asked Questions

Are ten codes the same across all security companies in Saudi Arabia?

No. There is no universal ten code standard. Individual companies establish their own code sets as part of their communication protocols. Guards must learn the specific codes used by their employer rather than assuming transferred meaning from a generic list.

Is 10-4 universally understood in Saudi Arabia’s security sector?

10-4 as an acknowledgment signal is among the most widely recognized radio communication codes globally. Its meaning — message received and understood — is consistently applied across enough contexts that it can be treated as a near-universal shorthand. Most other codes require organization-specific verification.

Do security guards in Saudi Arabia always use ten codes?

No. Many deployments, particularly smaller or corporate environments, use plain language communication rather than formal code systems. Ten codes are more common in larger operations with established radio communication infrastructure.

What is the most important communication skill for a security guard?

Clear, calm, professional communication in plain language — the ability to describe a situation accurately, transmit relevant information under pressure, and coordinate with colleagues and emergency services in terms that are immediately understood. Ten codes are a useful supplement to this skill; they are not a substitute for it.

Should I ask a security company about their communication protocols during evaluation?

Yes. Ask what systems guards use for routine communication and incident reporting, how supervisors are alerted to developing situations, what the escalation procedure is, and how clients receive notification of significant events. Clear answers to these questions indicate a company that has thought communication through as an operational function.

Final Takeaways

Ten codes are a radio communication tool with a specific history and a specific purpose — brevity and standardization in high-volume radio communication contexts. Their use in Saudi Arabia’s security sector is not universal, their specific meanings are not standardized across organizations, and their value as a communication shorthand is most relevant in larger operations with established radio protocols. For aspiring guards, the more important communication investment is developing clear, professional plain language communication — the skill that performs well in the situations codes are not designed to handle. For businesses evaluating providers, communication protocols are worth examining as an indicator of operational maturity.