Bulk SMS in Poland goes out from alphanumeric sender IDs (no national pre-registration as of 2026) or Polish numbers; numeric international senders are overwritten and URL shorteners are banned. VoIP in Poland is regulated by UKE, and the 2023 Act on combating abuse in electronic communications makes operators block or hide spoofed caller IDs and filter smishing SMS.
Rules last checked: October 2026.
Bulk SMS in Poland: sender ID rules
| Sender type | Status in Poland as of 2026 |
|---|---|
| Alphanumeric | Supported without pre-registration; generic names are filtered |
| Polish mobile long code | Supported, two-way capable |
| International numeric sender | Not supported; overwritten with an alphanumeric ID |
| Short code | Not offered on standard international A2P routes |
Pick a sender ID that clearly names your brand. Names like INFO or SMS get filtered by Polish operators, and names that imitate public institutions are blocked (see below). Background in SMS sender ID types.
Anti-smishing rules for SMS senders
The Act of 28 July 2023 on combating abuse in electronic communications, in force since September 2023, changed how SMS are filtered:
- operators must automatically block SMS that match smishing patterns supplied by CERT Polska (NASK) or found by their own systems;
- public institutions can reserve their names as sender IDs, and messages using those names from anyone else are blocked;
- impersonating another sender is a criminal offence.
In practice: do not use public URL shorteners (they are banned on Polish routes), write full links on your own domain, and test long messages with links before a bulk send, since some networks block them. See SMS content restrictions.
Consent and Polish networks
Since the Electronic Communications Law (PKE) took effect in November 2024, direct marketing by SMS or phone needs the recipient's prior consent, and each message should offer an easy opt-out. The four networks are Orange, Play, Plus and T-Mobile. Polish letters such as ą, ę, ł, ś and ż are not in GSM-7, so a message using them is sent as Unicode with 70 characters per part (GSM-7 vs Unicode).
VoIP in Poland: regulator and numbering
VoIP is legal in Poland. UKE (the Office of Electronic Communications) regulates the market, keeps the register of telecom undertakings and manages numbering. Polish numbers have nine digits and no trunk zero. Geographic numbers start with a two-digit area code (22 Warsaw, 12 Krakow), and mobile numbers start with prefixes such as 50, 51, 53, 57, 60, 66, 69, 72, 73, 78, 79 and 88. Freephone starts with 800. Rate decks list mobile by operator (mobile termination rates).
CLI rules and anti-spoofing in Poland
Under the 2023 act, operators must stop CLI spoofing: when the probability of spoofing is high, the call is blocked; in other suspicious cases the caller number is hidden from the called party. UKE also signed an agreement with the largest operators to limit CLI spoofing. Calls from abroad that present a Polish number are the main target. UKE can request data from operators and the act sets prison terms for impersonation.
For buyers this means a Polish CLI on traffic that does not originate in Poland is likely to be blocked or hidden. Present a number you hold. See CLI spoofing rules and CLI vs non-CLI routes.
What buyers ask for on Polish routes
- Whether the CLI is delivered intact on each mobile network.
- Rates for fixed and for Orange, Play, Plus and T-Mobile, plus ASR and ACD targets.
- For SMS: direct routes, sender ID preservation and link handling; how to test an SMS route covers the checks.
Check coverage on the Poland VoIP destination page and the Poland SMS destination page, or read about our VoIP termination and A2P SMS routes. VoIPMatcher sources the route from its carriers and manages it; buyers and sellers never see each other. Request a Poland voice route or request a Poland SMS route.
Frequently asked questions
Can I use URL shorteners in SMS to Poland?
No. Public URL shorteners such as bit.ly are banned on Polish SMS routes and messages using them are blocked or filtered. Use the full link on your own domain. Long messages with links can also be blocked by some networks, so test a few messages on each operator before a bulk send.
Why was my numeric sender ID changed in Poland?
Polish operators do not accept international numeric sender IDs on A2P traffic, so they are overwritten with an alphanumeric ID. To keep your identity, send from a branded alphanumeric sender ID, or from a Polish mobile number if you need recipients to reply.
Do I need consent to send marketing SMS in Poland?
Yes. Under the Electronic Communications Law in force since November 2024, direct marketing by SMS or phone call needs the recipient's prior consent. Keep a record of how and when consent was given and include a simple way to opt out in every message.
Who regulates telecoms in Poland?
UKE, the Office of Electronic Communications, headed by its President. It keeps the register of telecom undertakings, manages the numbering plan and enforces the anti-abuse rules together with CERT Polska at NASK, which supplies smishing patterns to operators. UKE can also request data from operators.
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