# A2P SMS, OTP, and sender ID rules in Cambodia

> BroadNet delivers A2P SMS and OTP in Cambodia over direct connections to Cellcard, Smart Axiata, and Metfone, with TRC-KH sender ID registration in 7-14 business days.

- Canonical URL: https://www.broadnet.me/coverage/cambodia
- Language: en
- Last updated: 2026-10-21
- Publisher: BroadNet (https://www.broadnet.me)

Direct termination into Cellcard, Smart Axiata, and Metfone with TRC-KH aligned sender ID registration.

## Key facts

- Regulator: TRC-KH (Telecommunications Regulator of Cambodia)
- Dialling code: +855
- MCC: 456
- Mobile subscribers: 23M
- Sender-ID lead time: 7-14 business days
- Time to launch: Live in 8–19 business days from test-access request to production (set by the sender-ID lead time)
- Typical OTP latency: 3.4 s
- Typical delivery rate, operator-direct: 98.7%
- SMS price band: USD 0.03 – 0.055 (indicative list rates, reviewed 2026-09-24)
- Billing currencies: USD

## Operators

| Operator | MNC | Route | Grade | A2P rate |
|---|---|---|---|---|
| Cellcard | 456-01 | Direct | A+ | USD 0.0447 |
| Smart Axiata | 456-04 | Direct | A+ | USD 0.0424 |
| Metfone | 456-08 | Direct | A | USD 0.04 |

## Technical facts for Cambodia

Network codes, message lengths and sender-ID rules in one table. Segment lengths are the GSM standard values (3GPP TS 23.038).

| Technical facts | |
|---|---|
| Mobile country code (MCC) | 456 |
| Dialling code | +855 |
| Operators (MCC-MNC) | Cellcard · 456-01; Smart Axiata · 456-04; Metfone · 456-08 |
| SMS length, GSM-7 (Latin alphabet) | 160 characters in a single SMS; 153 per part when concatenated |
| SMS length, UCS-2 (Arabic, Cyrillic and other scripts) | 70 characters in a single SMS; 67 per part when concatenated |
| Regulator | TRC-KH (Telecommunications Regulator of Cambodia) |
| Sender-ID rules | TRC-KH + operator sender ID registration. Khmer (UCS-2) and English supported. |
| Sender-ID lead time | 7-14 business days |

## Pricing

| Band | Transactional | Promotional | Note |
|---|---|---|---|
| Pay-as-you-go | USD 0.0400 | USD 0.0488 | List rate up to 100K messages/month |
| Growth · 100K+ | USD 0.0352 | USD 0.0430 | Auto-tier discount |
| Volume · 1M+ | USD 0.0296 | USD 0.0361 | Includes quarterly route review |
| Enterprise | Custom | Custom | Direct operator pricing + signed SLA |

## Sender ID

TRC-KH + operator sender ID registration. Khmer (UCS-2) and English supported.

TRC-KH + operator sender ID registration: 7-14 business days.

## Rules

- **TRC-KH sender ID**: Sender IDs registered via operator route.
- **Khmer (UCS-2)**: Khmer script supported.
- **Government framework**: PII handling per government rules.
- **Advertising window 08-21**: TRC (May 2026): advertising SMS may only be sent between 8:00 AM and 9:00 PM.

## Compliance

TRC allows advertising SMS only between 08:00 and 21:00. Government framework on PII handling.

## Sample A2P template

```text
Your code is 471829.
```

## Related

- https://www.broadnet.me/regulations/cambodia
- https://www.broadnet.me/pricing/sms/cambodia