The letter iAbout Comreg IconAbout PRS IconAbout PRSAuthorise Postal ProvidersAuthorise Postal Providers IconBase Station Location IconRadio Tower broadcasting wavesBilling Option IconShow more billing options for this planView this sectionA rightward arrowCode of Practice IconCode of PracticeA weighing scalesCompare Services IconCompetition Law Enforcement IconCompetition Law EnforcementPerson holding their hand up with a question markComplaints and Queries IconCompliance Enforcement IconCompliance EnforcementComreg Investigations IconComreg InvestigationsGroup of peopleConsumer Services IconComReg ConsumerTwo people speaking with a speech bubblesGovernment building with flagCorporate Governance IconCoverage Map of IrelandCoverage MapPerson wearing a headsetCustomer Service IconArrow pointing downDownloadE-licencingE-licencing IconErrorA red sign with a white exclamation markFacebookThe Facebook LogoTwo Speech bubblesFeedback IconSquiggly line Iconfive_eight_gz IconOpen PadlockFreedom Act IconFrequency Allocations IconFrequency AllocationsStampGeneral Authorisation IconLandline PhoneHome Phone IconIndustry Forms IconIndustry FormsComReg IndustryA tall buildingInternational IconInternationalLaptop computerInternet IconJargon Buster IconJargon BusterGavel hammer used in courtLegislation IconLicense Exceptions IconLicense ExceptionsLicensing IconRolled Certificate with RibbonLiecense Ammendments Permissions IconLiecense Ammendments PermissionsLinkedinThe LinkedIn Logo - this link will open in a new windowMarket Analysis IconMarket AnalysisMarket Information IconMarket InformationMegaphoneMobile PhoneMobile Phone Iconnav-home-iconnav-home-icon-bluenav-home-icon-greenA folded newspaperIndustry News IconA folded newspaperNews and Press IconNounSubmit a consumer query or complaintPhone BookNumbering Naming Addressing IconShow other information about planOther Information IconShow payment options for this planPayment Options IconPDF logoPDF fileLocation DevicePersonal Locator Beacon IconEnvelopePostal IconPostBoxPostal Authorisation IconEuro symbolPremium Rate IconTest Trail One IconTest Trail OnePrice Control Accounting IconPrice COntrol AccountingProductsProducts IconPRS Number IconPRS NumberBlank PagePublications IconRadio SpectrumRadio Spectrum IconRadio Tower broadcasting wavesIndustry Radio Spectrum IconRegulation Of An Post IconList with a tick markSignal wavesRSS FeedSpectrum Awards IconSpectrum AwardsSpectrum Compliance IconSpectrum ComplianceJigsaw pieceStrategy IconTips Advice IconTips AdviceShapeTwitterThe Twitter Logo - this link will open in a new window
Home / Industry Home / Licensing / Numbering / Do Not Originate List

Do Not Originate List

This page contains:

  • Introduction

  • What is the ‘Do Not Originate list’?

  • Who compiles and maintains the DNO List?

  • Who assigns phone numbers in Ireland?

  • Why are inbound-only numbers at risk of scamming?

  • What numbers should be included on DNO List?

  • How do I apply to add a number to the DNO List?

  • Is there a fee to add a number to or remove a number from the DNO List?

  • Will I be notified if my number is included on the DNO?

  • If my number is included on the DNO, will I be notified when my number is blocked by operators?

  • My number was accidentally included on the DNO and has been blocked, how can I unblock it?

  • Who can I contact with a query on the DNO List?

Introduction

Interested organisations are invited to submit suitable telephone numbers to a Do Not Originate list (“DNO List”) being compiled by ComReg. The following sections describe the background to and benefits of the DNO List. This infographic contains further information.

What is the ‘Do Not Originate list’?

Many organisations use phone numbers that are only used for their clients or customers to contact them on e.g. for banking or public service helplines. These numbers are not used for making calls and are called “inbound-only” phone numbers.

In recent years, some inbound-only numbers have been “spoofed”, meaning that scammers have directed traffic to consumers pretending to come from these numbers. Consumers can be deceived or scammed as a result.

ComReg and the telecoms industry have discussed how to prevent scam voice calls in Ireland. One measure identified is the compilation and implementation of a DNO List.

The DNO List is a list of inbound-only numbers used by organisations and likely to be spoofed. Telecoms operators will block calls that present as numbers from the DNO List and so, scam calls on those numbers will cease.

Who compiles and maintains the DNO List?

ComReg compiles and maintains the DNO List. Organisations wishing to apply to add numbers to the DNO List should refer to the Guidance Note and Application Form.

Who assigns phone numbers in Ireland?

ComReg assigns phone numbers to telecoms operators in Ireland.

Telecoms operators, in turn, provide these numbers to their customers (e.g. organisations and consumers) for their needs.

Why are inbound-only numbers at risk of scamming?

Some organisations widely publicise their inbound-only numbers to consumers e.g. in adverts, on bank cards. Consumers may therefore recognise these numbers and place a level of trust in them.

Scammers know and can exploit this by using technology to make calls appear to be from a number associated with a particular organisation. Consumers can unknowingly answer such calls and be scammed or inconvenienced as a result.

What numbers should be included on DNO List?

The following types of inbound-only numbers are suitable for the DNO List:

  • Phone numbers that have a high likelihood of being scammed, including geographic numbers e.g. such as 01, 021 numbers, and Non-Geographic Numbers e.g. 1800 and 0818 numbers
  • Phone numbers that have been scammed in the past
  • High-profile or widely advertised phone numbers e.g. numbers on bank cards, public service numbers
  • Phone numbers with high volumes of consumer traffic

Some phone numbers are not suitable for the DNO List:

  • Phone numbers that are in use for making outbound calls must not be included on the DNO List as these calls will be blocked. Organisations should first ask their serving telecoms operator to check if there is live outbound traffic before proposing any numbers for the DNO List.
  • Phone numbers that have a low probability of being spoofed (e.g, internal business numbers).

How do I apply to add a number to the DNO List?

ComReg welcomes applications from organisations for numbers to add to the DNO list. Please note above the types of numbers most suitable for inclusion.

Organisations wishing to apply to add numbers to the DNO List should refer to the Guidance Note and Application Form

Is there a fee to add a number to or remove a number from the DNO List?

There is no fee to add or remove a number from the DNO List.

Will I be notified if my number is included on the DNO?

ComReg will not notify a DNO applicant if their number is to be included on the DNO List. However, if a DNO request is refused, ComReg will notify the applicant.

If my number is included on the DNO, will I be notified when my number is blocked by operators?

No, as operators implement the DNO at different times, there is no mechanism for notifying applicants when a number block is in place.

My number was accidentally included on the DNO and has been blocked, how can I unblock it?

ComReg has a process to remove numbers from the DNO List. Please refer to the Guidance Note and Application Form

Who can I contact with a query on the DNO List?

If you have any queries on the DNO List, please email dno@comreg.ie

Was this page helpful?

    Thank you for your feedback.
    Your feedback will help us improve this site.

      Thank you for your feedback.
      Your feedback will help us improve this site.