Ireland offers both one-way and two-way messaging. Alpha, local numeric, and alphanumeric sender ID's are supported and don't require pre-registration. International numeric numbers are not supported, so if you send a message to an Irish number using a number from any other country, it will not be delivered.
The following generic alpha sender ID's will be blocked and should not be used.
Alert, DEVICEPAIR, INFO, InfoSMS, QSMS, SECURITY, SMS, SMSINFO, TEXT.
Two-way messaging can be sent with dedicated long codes, and short codes. Both transactional and promotional content is allowed.