Bulk SMS in Germany needs no national sender ID registry as of 2026: alphanumeric IDs, German long codes and short codes all work, but marketing needs prior (in practice double opt-in) consent. VoIP in Germany is open to licensed carriers under the Bundesnetzagentur, and calls from abroad that show a German number get their caller ID suppressed unless they are genuine roaming calls.
Rules last checked: October 2026.
Bulk SMS in Germany: sender ID rules
Germany has no central sender ID register like the UK or Singapore. As of 2026 the main sender types behave like this:
| Sender type | Status in Germany |
|---|---|
| Alphanumeric (up to 11 characters) | Supported and usually preserved; no national pre-registration, but some providers ask for it |
| German mobile long code | Supported, two-way capable |
| International long code | Supported on most routes |
| Short code | Supported, with several weeks of provisioning |
Because nothing is registered centrally, the route itself decides quality. Some providers pre-approve sender IDs per customer to cut phishing, so check before launch. The general picture is in SMS sender ID types and sender ID registration by country.
Opt-in, opt-out and restricted content
Marketing SMS to consumers needs prior express consent under the German Unfair Competition Act (UWG), and German case law makes double opt-in the safe standard: the user signs up, then confirms. Keep proof of consent with a timestamp. Every promotional message should offer a free way to stop. There is no national do-not-text list, so your own suppression list is what protects you.
- Cannabis, adult content, gambling without a German licence, and phishing-style content are refused by most routes.
- Public URL shorteners raise filtering risk; use your own domain.
- Send marketing in daytime hours; OTP and alerts can go at any time.
See SMS opt-in and opt-out compliance.
German mobile networks
Three networks carry almost all traffic: Telekom, Vodafone and O2 (Telefonica), with 1&1 building a fourth network. German mobile numbers start with 015, 016 or 017. Test each network separately, since a route can be direct to one operator and indirect to another; how to test an SMS route explains the method.
VoIP in Germany: is it legal and who regulates it?
Yes. VoIP is legal and widely used in Germany. The Bundesnetzagentur (BNetzA) regulates telecoms under the Telecommunications Act (TKG), assigns numbers and enforces numbering misuse. Providers of publicly available telephone services must notify BNetzA. Geographic numbers start with 0 plus an area code (030 Berlin, 089 Munich), mobile numbers with 015, 016 or 017, and freephone with 0800.
Mobile termination costs much more than fixed, so most rate decks split Germany into fixed and per-operator mobile prefixes. See mobile termination rates.
CLI rules and anti-spoofing measures
Section 120 of the TKG sets the CLI rules as of 2026:
- the originating provider must send a complete German national number that the caller is entitled to use, and other networks may not change it;
- when a call arrives from a foreign network showing a German number, the German network marks it and suppresses the number display, except for genuine international mobile roaming;
- called parties must be able to reject calls with suppressed numbers easily and free of charge;
- BNetzA can request caller data, withdraw misused numbers and stop billing.
For buyers this means a call from outside Germany cannot present a German CLI to the called party. Advertising calls may not hide the number, and calls to consumers need prior consent. Background in CLI spoofing rules and local CLI explained.
What buyers ask for on German routes
- CLI or non-CLI, and whether the CLI arrives intact on each mobile network (CLI vs non-CLI routes).
- Separate rates for fixed and for each mobile operator.
- ASR and ACD targets, billing increments and the traffic type (retail, call center, OTP voice).
- For SMS: direct or aggregator route, delivery report quality and OTP latency.
Check coverage on the Germany VoIP destination page and the Germany 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 Germany voice route or request a Germany SMS route.
Frequently asked questions
Do I need to register a sender ID in Germany?
Not with a national authority. Germany has no central sender ID register as of 2026, and alphanumeric IDs of up to 11 characters are generally delivered as sent. Some SMS providers pre-approve sender IDs per customer to limit phishing, so ask your route provider before launch and avoid generic names or names of brands you do not own.
Is double opt-in required for SMS marketing in Germany?
German law requires prior express consent for marketing SMS, and courts expect the sender to prove it. Double opt-in, where the user signs up and then confirms by reply or link, is the standard way to do that. Keep the consent record with date, time and source, and stop sending as soon as someone opts out.
Why do calls from abroad with a German number show no caller ID?
Section 120 of the Telecommunications Act requires German networks to suppress the displayed number when a call showing a German number arrives from a foreign network, unless it is a genuine roaming call. The rule targets spoofing. A business calling Germany from abroad should present its real number or a number it is entitled to use from that country.
Who regulates telecoms and VoIP in Germany?
The Bundesnetzagentur (Federal Network Agency) regulates telecoms, manages the German numbering plan and enforces numbering misuse, including spoofed and unlawful caller IDs. Providers of public telephone services must notify it. Data protection questions go to the federal and state data protection authorities.
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