B2B phone numbers in Germany: mobiles, consent rules and how to find them

B2B phone numbers in Germany come with a test that the UK and the US do not have: a sales call to a business needs at least presumed consent, a concrete reason to believe that business wants your call. German mobiles start +49 15, 16 or 17, and Scalelist’s 2026 benchmark found a phone number for 73% of an EMEA founder list.

This guide shows you how to read a German number, when a B2B call is allowed, why a private mobile changes the rules, what the GDPR adds, when to call from the US, and how to build a German call list with mobiles.

Can you cold call B2B phone numbers in Germany?

Only with a concrete reason. Section 7 of the German Act against Unfair Competition (UWG) treats a sales call to a business without at least presumed consent (mutmaßliche Einwilligung) as an unacceptable nuisance (UWG section 7). Presumed consent means you can point to a real reason this business would want the call, such as an offer that fits its actual operations.

Calls to consumers need prior express consent, and so do automated calling machines, whoever you call. The rule that catches B2B teams off guard is the number itself: the Bundesnetzagentur (BNetzA), Germany’s Federal Network Agency for telecoms, treats a sales call to a person’s private number as a call to a consumer, even when you address them as a professional.

How to read a German business phone number

German numbers use country code +49, then the national number without its leading 0. The Bundesnetzagentur reserves the 015, 016 and 017 blocks for mobile services, with 10 or 11 digits after +49, and 0164, 0168 and 0169 are paging blocks (BNetzA).

• Mobile: 0171 3920012 at home, +49 171 3920012 from abroad, and +491713920012 in E.164, the format most dialers and CRMs expect.
• Berlin landline: 030 23125012 becomes +49 30 23125012. A landline can be a direct extension (Durchwahl) or the company’s main line.
• Length varies: mobiles run 10 or 11 digits after +49 and landline lengths vary by area code, so validate a number by its prefix, not its length.

Business mobile or private mobile: why it matters in Germany

In Germany, whose number it is decides which rule applies. The Bundesnetzagentur judges a call to a business number by its purpose: an offer for the person’s business is B2B. A sales call to a private number is treated as consumer advertising, whether you address the person as an employee, an owner or a professional (BNetzA FAQ).

Three habits keep you on the right side of that line:

1. Prefer company-issued numbers: a business mobile or a direct extension.
2. Tag each mobile as business or private when you know which it is, together with its source.
3. When you cannot tell, call the direct line or the main line first and ask for the best number.

The difference between number types, and which one connects best, is covered in direct dial vs mobile vs switchboard. For every other way to get a number, see how to find direct dial phone numbers.

German calling rules for B2B: UWG, caller ID and fines

German law sets a different bar for each channel. Of phone, email, fax and automated calls, the live call is the only one that can reach a new business contact without prior express consent.

• B2B calls: at least presumed consent. A generic pitch to a random list is the risky case.
• Consumer calls and private numbers: prior express consent, which must be documented from the moment it is given and shown to the Bundesnetzagentur on request (section 7a UWG).
• Email, fax and automated calls: prior express consent from the addressee, businesses included. Email has one exception: your own customers, for similar products, with an opt-out at every send (section 7(3) UWG).
• Caller ID: show a number assigned to your company. A withheld number, or one that is not yours, can cost up to 300,000 EUR, for consumer and B2B calls alike (BNetzA).
• Who enforces: the Bundesnetzagentur fines unlawful sales calls to consumers, up to 300,000 EUR (UWG section 20). It cannot fine calls to businesses, but a business can act against unwanted calls under civil and competition law.
• What to screen against: the UWG works on consent, not on a national opt-out register, so your own do-not-call list is the one that matters.
• Hours: the UWG sets no calling hours.

For the rules in other countries, see our guide to B2B cold calling laws.

B2B contact data in Germany: the GDPR on top of the UWG

The UWG decides whether you may call; the General Data Protection Regulation (GDPR) decides whether you may hold and use the number. A named person’s work mobile is personal data. Direct marketing can rest on legitimate interest after a balancing test, and the person’s right to object to it is unconditional (EDPB Guidelines 1/2024).

GDPR fines reach 20 million EUR or 4% of annual turnover, whichever is higher (EDPB Guidelines 04/2022). More in our guide to B2B contact data and the GDPR.

Providers draw lines at the EU border too. Findymail, for example, says it does not provide phone numbers for contacts in the European Union because of the GDPR (Findymail). Before you buy B2B contact data for Germany, check that the provider returns German numbers at all, and ask for its Data Processing Agreement, sub-processor list and opt-out process.

Best time to call German businesses from the US

Germany runs on Central European Time (CET, UTC+1) and switches to Central European Summer Time (CEST, UTC+2) from the last Sunday in March to the last Sunday in October (PTB). New York runs UTC-5, and UTC-4 from the second Sunday in March to the first Sunday in November (15 U.S.C. 260a).

So Germany is 6 hours ahead of New York for most of the year, and 5 hours ahead for a few weeks in March and around the end of October.

We have no German timing data. The large published datasets point to mid-morning local time: Orum’s 2024 data shows connect rates “peaking at 10 am (local time)” (Orum), and Gong’s 300M+ calls show 8% connecting at 10 AM against 6% by 6 PM (Gong).

• 10 AM in Germany is 4 AM in New York. Realistic only for reps working from Europe.
• 2 to 5 PM in Germany is 8 to 11 AM Eastern. The practical block for East Coast teams; West Coast teams start at 5 AM Pacific.

More on timing: the best time to cold call.

Germany coverage: market size and benchmark

Scalelist’s Lead Finder matches over 15.6 million profiles in Germany, over 1.3 million of them decision makers at director level and above (September 2026). These are searchable profiles, not verified contacts, and can include people matched on a past role, so treat them as upper bounds.

For phone coverage, the closest measure is our 2026 benchmark for EMEA. On the same founder list, Scalelist found a phone number for 73% and an email for 89%; the other providers with a phone product found numbers for 8% to 63%. That is a regional result, not a German rate, and any phone number counted.

Country-level coverage is not published yet. Our study of mobile coverage by country explains what is measured and what is pending, and the full regional table is on our provider comparison.

How to find German business mobiles with Lead Finder

Scalelist’s Lead Finder turns one plain-English sentence into a list of matching people, then finds their mobiles and verified work emails. In Germany, the sentence does double duty: a tight segment is also what makes your reason for calling true for every person on the list.

1. Describe one segment with one reason

Example: “Heads of procurement at industrial machinery manufacturers in Germany with 200 to 2,000 employees.” Lead Finder shows what it understood (title, industry, country, company size) and how many people match before you spend a credit. Sizing is free.

2. Add the people you want

Each lead added costs 1 credit. If a chip is wrong, rephrase the sentence and check the count again.

3. Find mobiles and emails

A mobile costs 20 credits when found. An email costs 1 credit when found and comes labeled Valid or Risky. A miss costs nothing.

4. Tag, then dial

Tag business and private numbers where you can, write the reason for the call on each record, and export to a CSV, HubSpot or your sequencer. Already have names and companies? The Mobile Finder adds mobiles to your CSV.

What 150 German prospects cost: 150 leads cost 150 credits, and 150 mobiles cost at most 3,000 more, so at most 3,150 credits. Every miss lowers the total. On the 5,000-credit plan (199 USD a month), each mobile found works out to about 0.80 USD.

A German call opener: lead with the reason

In Germany the reason for the call is your presumed consent, so say it in the first two sentences. Use the surname and the formal Sie unless the other person switches.

• Reason in sentence two. It is the business interest you would point to if anyone asked why you called.
• Your own number on screen. Never a withheld or borrowed caller ID.
• Objections logged the same day, in every tool that dials.

More openers to adapt: cold call opening lines.

Common challenges with German business numbers

Most German calling problems start before the dial: an unknown number type, a reason that does not fit everyone on the list, or the wrong caller ID.

You don’t know whether a mobile is private

Treat it as private until you know otherwise. Call the direct line or the main line first and ask for the best number to reach the person.

Your pitch fits some of the list, not all of it

Split the list. One sentence per segment in Lead Finder gives you one reason per segment, and a reason that is true for everyone you call.

Your dialer shows a local number

A local-presence number is fine only if it is assigned to your company. The Bundesnetzagentur counts a displayed number that is not assigned to the caller the same way as a withheld one.

Your list spans more than Germany

The rules change at every border. Compare UK business mobiles, where live B2B calls are opt-out, with Australian business mobiles and Brazilian business mobiles.

What to look for in a provider of German contact data

For Germany, the first question is whether a provider returns phone numbers for EU contacts at all.

• Phone numbers for EU contacts at all: some providers exclude them.
• A Data Processing Agreement, Standard Contractual Clauses and a published sub-processor list.
• An opt-out for the people in its data.
• Your uploads stay yours: contact data you submit is not added to the provider’s database.
• Charged only when a mobile is found, with coverage published by region.

How Scalelist helps

Scalelist, an AI lead finder, is where you get the mobile number, not just the email. It finds and verifies contact details on demand rather than serving a pre-compiled list. It operates under the GDPR and Singapore’s PDPA, with a Data Processing Agreement, Standard Contractual Clauses and a published sub-processor list (trust center).

• 20 credits per mobile found, 0 for a miss: about 0.80 USD per mobile on the 5,000-credit plan and about 0.65 USD on the 20,000-credit plan.
• Free sizing, so you can check a German segment is large enough before you spend.
• Your judgment stays yours: the reason for each call and the business-or-private check are your steps.

For the full contact record behind each call, see our playbook on finding business contact information.

FAQ

What does a German mobile number look like?

It starts 015, 016 or 017 at home and +49 15, 16 or 17 from abroad, with 10 or 11 digits after +49. In E.164 format, the media number 0171 3920012 is written +491713920012. Numbers starting 0164, 0168 or 0169 are paging numbers, not mobiles, even though they sit in the 016 range.

Is B2B cold calling legal in Germany?

Only with at least presumed consent. Section 7 of the UWG requires a concrete reason to believe the business would want your call, such as an offer tied to its operations. Calls to consumers and to private numbers need prior express consent, and automated calls need it from everyone. This is not legal advice.

Can I call a German prospect’s private mobile?

Not without prior express consent. The Bundesnetzagentur treats a sales call to a private number as consumer advertising, even when you address the person as a professional, and consumer calls need prior express consent. Prefer business mobiles and direct lines, and tag each number as business or private. This is not legal advice.

Can I cold email German businesses instead?

Usually not. Section 7 of the UWG requires prior express consent for advertising by email, businesses included. The exception covers your own customers, for similar products, when they have not objected and each email offers an opt-out. For new B2B prospects, a relevant call to a business number has the lower bar. This is not legal advice.

What is the best time to call Germany from the US?

Germany is 6 hours ahead of New York for most of the year. Published data from Orum and Gong puts the connect peak around 10 AM local time, which is 4 AM Eastern. A practical block for East Coast teams is 8 to 11 AM Eastern, which is 2 to 5 PM in Germany. The UWG sets no calling hours.

How many B2B phone numbers in Germany can Scalelist find?

Scalelist matches over 15.6 million profiles in Germany, over 1.3 million of them decision makers (September 2026). We have no German coverage rate yet: in our 2026 EMEA benchmark, Scalelist found a phone number for 73% of the list. Each mobile costs 20 credits when found and nothing when it is not.

Sources

• UWG section 7 and UWG section 20, gesetze-im-internet.de
• Bundesnetzagentur: Unerlaubte Telefonwerbung, FAQ, Mobile Dienste (0)15, (0)16, (0)17, Notice 148/2021: numbers for media productions
• German national numbering plan filed with the ITU
• EDPB: Guidelines 1/2024 on legitimate interest, Guidelines 04/2022 on fines
• Findymail: Phone Finder
• PTB: Legal time in Germany, When summer time begins and ends
• 15 U.S.C. 260a, Cornell LII
• Orum: Cold calling in 2025 and Gong: How to master cold calls (2024)
• Scalelist provider benchmark, scalelist.com/b2b-data-providers-comparison/ (updated 18 September 2026); Scalelist people count, 27 September 2026.