PTT TELEGRAM · 4notify
No. BR-RS-004Date 2026-05-26
REGULAR
04
Telegram 04 of 08 · Telecoms
FiledSMS

RATEL and Serbian mobile prefixes: sender ID, STOP and numbering plan

RATEL (Republic Agency for Electronic Communications and Postal Services) supervises Serbian numbering plan and A2P duties towards three local carriers: MTS (Telekom Srbija), Yettel and A1 Serbia. 4notify delivers SMS to +381 numbers via tier-1 international A2P gateway.

Context

Many platforms route Serbian SMS through tier-2 EU aggregators. Result: alphanumeric sender ID dropped, delivery falls below 88%, STOPs never return.

Legal framework
Zakon o elektronskim komunikacijama 35/2023

Opt-in duty for marketing, STOP keyword honouring.

RATEL Pravilnik o A2P uslugama

Alphanumeric sender ID allowed up to 11 chars; spoofing sanctioned with suspension.

Steps
01

Register sender ID with tier-1 gateway

Max 11 chars; trade documentation (Serbian IP Office or EU TM); 3-7 business day activation.

02

Automated STOP/PRESKOCI/PREKINI keyword

4notify manages STOP, PREKINI, PRESKOCI; number unsubscribed from all future campaigns.

03

HLR lookup + per-operator DLR

Before dispatch, HLR identifies current carrier (~40% portability). Per-operator reason code in dashboard.

04

Per-operator latency monitoring

P50: MTS 2.3s, Yettel 2.5s, A1 2.7s. Retry on push/Viber/voice if threshold exceeded.

Code
bash
# Glavni +381 prefiksi:
#   +381 6X — Mobilni
#       +381 60/61/62/63 — Telenor (Yettel)
#       +381 64/65/66 — MTS (Telekom Srbija)
#       +381 67 — Globaltel MVNO
#       +381 69 — MTS deo
#   +381 11 — Beograd fiksni
#   +381 21 — Novi Sad fiksni
#   +381 18 — Niš fiksni
Sample message
SMS

YourBrand: Order 2026-RS-0481 ready for pickup at Knez Mihajlova 14, Belgrade. Open until 20:00. STOP to unsubscribe.

Checklist
  • Sender ID registered with all 3 carriers
  • STOP keyword active (Serbian + English)
  • Test on MTS / Yettel / A1 numbers
  • Audit log exportable for RATEL inspection
What 4notify does differently

Premium tier-1 delivery to all 3 Serbian carriers with automatic RATEL compliance — no Serbian legal entity needed.

FAQ
Does 4notify peer directly with Serbian carriers?

No — delivery via tier-1 international A2P gateway that connects to MTS, Yettel and A1.

Start free

14 days, no card. Support in Serbian and English.

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