Can US and European business units share an IP address under GDPR?

Summary

The consensus among marketers, experts, and official documentation is that US and European business units *can* technically share an IP address under GDPR, but it's crucial to understand and address the complexities involved. GDPR doesn't explicitly forbid sharing IP addresses, but it focuses on *how* data is handled. The primary concerns revolve around data residency, where data is stored, how EU citizens' data is processed (requiring a legal basis like consent or legitimate interest), transparency with users, and implementing strong data protection measures. Legal counsel specializing in GDPR is frequently recommended due to the intricacies and varying interpretations of the regulation. Robust Data Protection Impact Assessments (DPIAs) are necessary when shared infrastructure is used.

Key findings

  • No Technical Barrier: There's no inherent technical reason preventing US and EU business units from sharing an IP address, particularly if using a common sending service or ESP.
  • Data Handling is Key: GDPR compliance depends heavily on how data is handled, stored, and processed, rather than the IP address itself.
  • GDPR Applies to EU Data: If the shared IP is used to process or track data of EU citizens, GDPR applies regardless of where the business units are located.
  • IP as Personal Data: IP addresses *can* be considered personal data under GDPR if they can be linked to an identifiable individual, thus requiring a legal basis for processing.
  • Data Residency Important: Maintaining EU citizen data within the EU reduces GDPR-related risks and simplifies compliance.

Key considerations

  • Consult Legal Counsel: Engage legal counsel specializing in GDPR to navigate the complexities of the regulation and ensure compliance, particularly regarding data processing agreements.
  • Data Segregation: Implement data segregation practices to separate EU and US data, making compliance management more straightforward.
  • Transparency and Consent: Provide clear and transparent data processing notices to users about IP address usage and obtain consent where necessary.
  • Legal Basis for Processing: Ensure a valid legal basis (consent, legitimate interest, etc.) exists for processing personal data, including IP addresses, of EU citizens.
  • DPIA Implementation: Conduct a thorough Data Protection Impact Assessment (DPIA) for any shared infrastructure scenarios to identify and mitigate GDPR-related risks.
  • Standard Contractual Clauses (SCCs): Incorporate Standard Contractual Clauses (SCCs) in contracts to legitimize data transfers outside the EU when sharing IP addresses and data.
  • Cross-Border Data Transfers: Carefully manage cross-border data transfers and consider maintaining separate US and EU data centers.
  • International Compliance: Focus on adhering to regional rules, with GDPR being paramount when handling EU citizens' data.

What email marketers say
14Marketer opinions

The question of whether US and European business units can share an IP address under GDPR is complex. There's no technical barrier, but GDPR implications hinge on data handling practices. Key concerns involve whether EU citizens' data is processed and stored, requiring a legal basis like consent or legitimate interest. Data segregation, transparent data processing notices, and adherence to data residency requirements are crucial. Consulting legal counsel specializing in GDPR is frequently recommended due to the nuanced nature of the regulation.

Key opinions

  • No Technical Barrier: There are generally no technical reasons preventing US and European business units from sharing an IP address, especially if using a common ESP.
  • GDPR Applicability: If the shared IP is used to track or process data of EU citizens, GDPR applies regardless of the business unit's location.
  • Data Location: Focus on where the data is stored and processed. Keeping EU citizen data within the EU helps mitigate GDPR concerns.
  • Legal Basis Required: Processing personal data (including IP addresses) of EU citizens requires a legal basis, such as consent or legitimate interest.
  • IP as Personal Data: IP addresses can be considered personal data under GDPR if they can be linked to an identifiable individual.

Key considerations

  • Legal Counsel: Consult with a lawyer specializing in GDPR to ensure compliance, especially regarding data processing agreements and compliance demonstrations.
  • Data Segregation: Implement data segregation strategies to separate EU and US data, facilitating easier GDPR compliance.
  • Transparency: Provide clear and transparent data processing notices to inform users if their IP addresses are being used and for what purposes.
  • Contractual Clauses: Incorporate Standard Contractual Clauses (SCCs) into contracts to legitimize data transfers outside the EU, even when sharing IP addresses.
  • Cross-Border Data Transfers: Carefully manage cross-border data transfers, possibly maintaining separate US and EU data centers.
  • Data Residency: Ensure data residency, guaranteeing EU citizen data remains within the EU to comply with GDPR.
Marketer view

Email marketer from Privacy Laws & Business discusses the need to have a legal basis for processing data. This could be consent, legitimate interest, or other legal grounds. Shared IP scenarios need careful assessment.

August 2022 - Privacy Laws & Business
Marketer view

Email marketer from Email Marketing Forum suggests focusing on data residency. Even with a shared IP, ensure EU citizen data remains within the EU to mitigate GDPR concerns.

April 2023 - Email Marketing Forum
Marketer view

Email marketer from Reddit explains that GDPR doesn't explicitly prohibit sharing an IP address, but the data stored and processed is key. If the IP is used to track EU citizens, GDPR applies regardless of where the business units are located.

April 2023 - Reddit
Marketer view

Email marketer from Marketing Land stresses the importance of data segregation. Segment EU and US data to manage compliance effectively when sharing infrastructure.

April 2023 - Marketing Land
Marketer view

Email marketer from Quora recommends consulting a lawyer specializing in GDPR, as it's a complex issue. They mention factors like data processing agreements and demonstrating compliance.

December 2023 - Quora
Marketer view

Email marketer from LegalStackExchange suggests incorporating Standard Contractual Clauses (SCCs) in contracts to legitimize data transfers outside the EU, even when sharing IP addresses.

November 2022 - LegalStackExchange
Marketer view

Marketer from Email Geeks shares their understanding that email addresses are considered personal data and need protection at rest and in transit for GDPR compliance. Moving data out of the EU is possible if all systems and vendors meet GDPR, validated through contracts (requiring legal consultation). Moving data the other way is generally easier, but legal confirmation is still recommended.

August 2024 - Email Geeks
Marketer view

Email marketer from Medium, recommends using a VPN to ensure GDPR compliance if there is any uncertainty.

May 2023 - Medium
Marketer view

Email marketer from LinkedIn emphasizes the importance of clear and transparent data processing notices. Users should be informed if their IP addresses are being used and for what purposes.

December 2024 - LinkedIn
Marketer view

Email marketer from Forbes, answers that cross-border data transfers need to consider GDPR regulations, where US and EU data centers may need to be managed separately.

February 2023 - Forbes
Marketer view

Marketer from Email Geeks explains that networking (e.g., sending email) involves logging, which leads to data storage. This requires awareness and checking against various laws in different jurisdictions, making it a complex matter.

November 2022 - Email Geeks
Marketer view

Marketer from Email Geeks explains there is no reason why it should be an issue from an IP perspective - many companies use shared IPs and there is no guarantee they are sending to customers based in only EU/US etc.

July 2024 - Email Geeks
Marketer view

Marketer from Email Geeks explains that there is no technical reason why US and European business units can't share an IP address, as long as it's associated with a common sending service or ESP.

May 2024 - Email Geeks
Marketer view

Marketer from Email Geeks suggests treating all data as if protected by GDPR, recommends consulting with counsel due to varying data laws in the US.

March 2025 - Email Geeks

What the experts say
2Expert opinions

Expert opinions emphasize that GDPR compliance regarding shared IP addresses between US and European business units hinges less on the IP address itself and more on where the data is stored and how it's handled. The key is respecting regional rules, particularly GDPR, which applies when EU citizens' data is involved, regardless of business unit location or shared infrastructure. Consent, transparency, and comprehensive data protection practices are crucial.

Key opinions

  • Data Location Matters: GDPR compliance is primarily concerned with where the data is stored rather than the IP address used.
  • Regional Rules Compliance: For international email compliance, respecting the rules of each region is essential, including GDPR for EU citizens' data.
  • GDPR Applicability Scope: GDPR applies when EU citizens' data is involved, irrespective of the location of business units or shared IP address.

Key considerations

  • Consent and Transparency: Ensure you obtain proper consent for data processing and maintain transparency with users about how their data is being used.
  • Data Protection Practices: Implement robust data protection practices to safeguard EU citizens' data, regardless of where it's stored or processed.
Expert view

Expert from Word to the Wise explains that for international email compliance you need to focus on respecting each region's rules. Where GDPR is applicable (EU citizens are involved), it applies, regardless of the location of the business units or the shared IP, emphasizing consent, transparency, and data protection.

February 2023 - Word to the Wise
Expert view

Expert from Email Geeks explains compliance issues are probably less about the IP address and more about where the data is stored.

July 2023 - Email Geeks

What the documentation says
5Technical articles

Official documentation consistently identifies IP addresses as potential personal data under GDPR, especially when linkable to an individual. This necessitates a legal basis for processing, such as consent or legitimate interest. Utilizing shared infrastructure, including IP addresses, mandates a thorough Data Protection Impact Assessment (DPIA) to mitigate risks and ensure GDPR compliance.

Key findings

  • IP as Personal Data: IP addresses can be considered personal data under GDPR, especially when they can be used to directly or indirectly identify an individual.
  • Legal Basis for Processing: Processing IP addresses as personal data requires a legal basis under GDPR, such as consent or legitimate interest.
  • DPIA Requirement: Using shared infrastructure, including IP addresses, requires a thorough Data Protection Impact Assessment (DPIA) to identify and mitigate potential risks.

Key considerations

  • Compliance Assessment: Conduct a thorough assessment to determine if IP addresses are being used to identify individuals within the context of your data processing activities.
  • Data Minimization: Implement data minimization techniques to limit the collection and retention of IP addresses to only what is necessary.
  • Transparency and Consent: Ensure transparency with users about how their IP addresses are being used and obtain consent where necessary.
Technical article

Documentation from OneTrust explains that using shared infrastructure, including IP addresses, requires a thorough DPIA (Data Protection Impact Assessment) to identify and mitigate risks under GDPR.

November 2024 - OneTrust
Technical article

Documentation from Directive 95/46/EC, although superseded by GDPR, establishes the definition of data concerning health. Even though the question is not directly about health, it provides a perspective about GDPR in general.

March 2025 - European Parliament
Technical article

Documentation from Article 29 Data Protection Working Party clarifies that IP addresses can be considered identifiers under GDPR, particularly when combined with other data points.

September 2024 - European Commission
Technical article

Documentation from ICO (Information Commissioner's Office) states that personal data is any information relating to an identified or identifiable natural person. This can include IP addresses if they can be linked back to an individual.

January 2024 - ICO
Technical article

Documentation from GDPR.eu explains that IP addresses can be considered personal data under GDPR, especially if they can be used to identify an individual directly or indirectly. Thus, processing needs a legal basis.

December 2021 - GDPR.eu