Ireland became a pre-registration destination in July 2025, please see Information Notice on the SMS Sender ID registry issued by Comreg on 6 December 2024.
Important dates
• From 3rd July 2025 onwards, non-registered/validated alphanumeric sender ID (s) towards Ireland will be replaced with 'Likely Scam'.
• From 3rd October 2025 onwards, non-registered/validated alphanumeric sender ID (s) towards Ireland will be blocked.
Registration
The ComReg Registry is now live and accepting new Sender ID registration requests at: www.comreg.ie/senderid. Please note that only alphanumeric sender ID (s) need to be registered.
SIDOs (Sender ID Owners/End Brands)
If you haven’t registered your sender ID (s) yet, we strongly encourage you (SIDOs, Sender ID Owners) to do so as soon as possible to ensure your sender ID (s) are not replaced with "Likely Scam" from 3rd July onwards and blocked from 3rd October onwards. Please, make sure to authorise Sinch as our OPA during the process, which will allow us to carry your traffic.
Third Party Senders (ASPs, CRMs...)
Our Third-Party customers should also urge their own End Brands/SIDOs to register in the Registry; as part of the process, these SIDOs must authorise Sinch as their OPA (Originating Participating Aggregator) in the ComReg Registry and our Third Party customer as their Third Party partner, which is required for us to carry this traffic
Please note that there is little benefit in us registering on your behalf. Our strong recommendation is to register directly in the ComReg Registry, as this will result in shorter lead times and a more streamlined process.
• ComReg definition of “Third Party Sender”: “Any entity (such as an ISV) other than an SMS Aggregator that sends messages on behalf of one or more SIDOs. These messages are ancillary to a separate core service E.g. School communication platforms, courier company using merchant Sender ID for delivery updates, cloud CRM systems etc”
PAs (Participating Aggregators)
Aggregators sending traffic to Ireland that have not yet registered on the ComReg Electronic Register (ERAU), they must do so as soon as possible to ensure their traffic is not modified/blocked from July 2025 onwards:
- ERAU Registration: https://serviceregister.comreg.ie/
- Once ERAU unique identifier has been allocated by ComReg, Aggregators can then register in the Registry as a Participating Aggregator (PA): www.comreg.ie/senderid
Formatting requirements
Comreg is proposing that alphanumeric sender IDs must be in compliance with the following:
- have a minimum of 3 characters and a maximum of 11 characters
- contain only permitted characters: a-z A-Z 0-9 @ ! # % & ( ) * + , - . / : ; < = > ? [Space] Characters with an Irish language fada (subject to technical feasibility).
- not contain any other characters other than those permitted in the list above. Not permitted are characters with accents (E.g. è Ç), Greek letters (E.g. Ω Ψ) and include the following: £ $ “ ‘ ¡ €, with the exception of the Irish Fada which is permitted
- contain at least one letter (a-z A-Z)
- not contain predominantly numbers
- not be generic in nature (for e.g. ‘SMS’, ‘Verify’, ‘Doctor, ‘Dentist’, ‘Flowers’ etc)
- not be sensitive, offensive or obscene in nature
- not contain leading or trailing spaces
Important links & documents
Information Notice
The new Sender ID Format requirements can be found in the Annex 2 in the Information Notice:
The SIDO Eligibility Criteria (See Section 7.2 of Numbering Conditions of Use and Application Process Reference: ComReg 15/136R4 https://www.comreg.ie/media/2024/04/ComReg-15136R4.pdf)
** SIDOS that do not meet the Eligibility Criteria and/or Senders that are not compliant with the new format requirements cannot be registered.
Customers that have genuinely run out of time to register should contact us directly for assistance.
Using a local numeric sender could serve as a temporary alternative to prevent traffic from being labelled as ‘Likely Scam’. We have plenty of Irish long numbers in stock that our customers in need can use as their provisional sender ID (s) until their alphanumeric sender ID's are registered, to avoid traffic disruption.