A guide to verifying 400 numbers for sales calls

If you make sales calls in Spain and are wondering whether you need numbers in the 400 series, do not change your numbers yet. First, check the current official rules and whether they apply to your campaigns. Then speak to your provider, check the caller ID shown on outbound calls and test what happens when someone calls back.

In short:

• Before getting numbers in the 400 series, check the official source and whether your activity is covered.
• The number the recipient sees and the number used to place the call need separate checks.
• Changing a campaign number does not replace a review of the rules for making calls or handling personal data.
• Check the outbound setup, return calls and the procedure for failed calls with your provider.

If you use an automatic dialer for outbound campaigns, test its settings before launching the campaign.

What do Spain’s rules require for 400 numbers used in sales calls?

The rules on 400 numbers for sales calls can only be established by checking the current official text in the BOE and information from the CNMC. Without those sources, you cannot say whether their use is mandatory, which businesses or calls the rules would cover, or when any requirement would take effect.

Before asking your provider to change a number, find the official text, note its publication date and check whether it is in force. Then separate what it requires from what it allows or proposes. An announcement about numbering is not enough reason to change a campaign.

Check how the text defines the calls it covers and whether it sets out any exceptions. If you cannot confirm those points, hold off on the decision. Changing the number shown to the person you call, without knowing whether the rule applies to your business, could create unnecessary work. The page on virtual number options can help you explore numbering options; it does not establish a legal obligation.

How do you know if your campaign needs a 400 number?

For a campaign in Spain, start by classifying each outbound call by its purpose. Check whether it falls within the scope of the applicable official rules, then ask your provider which numbers are permitted for that use. The team making the calls and the number it currently uses are not enough to make the decision.

Separate calls that offer a product from calls that answer an enquiry or handle an order. Record the purpose of each call flow, even if the calls leave from the same queue. Then check which landline, mobile or virtual lines each flow uses. Do not assume any of them is valid until you have verified it.

If you are not sure which number each team uses, start with a review of your business phone setup. Do not change the whole company’s caller ID based only on what you call the campaign internally.

How do you obtain and set up a number for outbound calls?

To obtain and set up a number for an outbound campaign, ask your provider to confirm in writing whether the number is available, who will hold it and what caller ID recipients will see. Then test that the number appears on outbound calls and that return calls reach the right destination.

Before you launch the campaign, check these points with your provider:

• Assignment: which number they can provide and who will hold it.
• Caller ID: which number recipients will see and how you can verify it with test calls.
• Return calls: whether the number accepts incoming calls and where they will be answered. If it does not, what happens when someone calls back?
• Compatibility: whether the number works with the system your team uses to make calls.

If you use a business cloud PBX, check where return calls go and how call forwarding is set up. Do not assume the setup is correct just because outbound calls connect.

What obligations still apply if you change the number?

Changing the number a recipient sees does not settle the other questions raised by a sales campaign: why you can contact each person, how you record and act on requests not to be contacted again, and what information you must provide if you record the call. Check each point against the official rules that apply to your campaign before you start calling.

Split the review into three tasks. First, document why each contact is on the campaign list. This guide to consent for sales calls in Spain can help structure the review, but it does not replace the rules that apply to your campaign. Then decide where your team will log a request not to be contacted again and how it will keep that person off future lists.

If you record calls, check separately what information you must give the people you call and when. Ask the person responsible for the campaign to approve the script and process before calls go live, not after a complaint arrives.

What should you test before launching the campaign?

Before launching, make test calls through every route your team will use. Check the number displayed on the recipient’s phone, then call it back to see who answers. Test call forwarding too. Agree on how to stop outbound calls if the wrong number appears or nobody handles callbacks.

• Displayed number: compare it with the number planned for the campaign.
• Callbacks: call the number from an external phone and check where the call goes.
• Call forwarding: simulate an unanswered call and check where it goes.
• Issues: record the fault and the team affected. If you use customer records, check the PBX’s CRM integration.
• Failure: assign someone to stop outbound calls and notify the provider.

These are operational tests. To decide whether the displayed number is permitted for the campaign, check the applicable official rules.

Frequently asked questions

Can a small business keep its current number for calls that are not sales calls?

Do not change the number on every line just because you run sales campaigns in Spain. Separate calls by purpose and check the current official rules before deciding which number to use for each. Ask your provider to confirm how caller ID is configured for outbound calls.

Can someone call back a 400 number?

Do not assume they can. Ask your provider whether the number accepts incoming calls and how those calls are handled. Test a return call from a phone outside your company. If it does not reach a staffed extension or call queue, fix that route before using the number in a campaign.

Can you port a 400 number to another provider?

Do not plan a number transfer until you have confirmed whether that type of number can be transferred and under what conditions. Check the applicable official guidance and get written answers from the providers involved. Ask what would happen to outbound and incoming calls during the change. Do not assume a timeframe until it has been confirmed.

What should you ask your provider for to document the caller ID used for each call?

Ask for written confirmation of the number recipients will see for each outbound route: the cloud PBX, call forwarding and calls made outside the PBX. Also request a record of the tests carried out and a contact for reporting problems. That record helps you spot configuration errors; it does not replace checking the applicable rules.

What if an agent calls from a company mobile?

Treat it as a separate outbound route. Check which number the recipient sees and whether its use meets the requirements for the campaign. Do not assume the cloud PBX settings control calls made directly from a mobile. Request a demonstration to review how your team can organise outbound sales calls.

Request an autodialler demonstration to review how your team can organise outbound sales calls.

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Written by Mehdi Chouikh, CEO.