Area Code 90 – Athlone/Ballinasloe/Portumna/Roscommon
The phone area code for Athlone/Ballinasloe/Portumna/Roscommon is 90 (international format +35390). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 90
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Athlone/Ballinasloe/Portumna/Roscommon
The +353 90 area code is a geographic National Destination Code (NDC) within the Irish telephone numbering plan, administered by ComReg. It serves a large region in the Midlands and West of Ireland, encompassing the towns of Athlone, Ballinasloe, Portumna, and Roscommon, along with the surrounding rural areas. This code is used for fixed-line (PSTN) and fixed-wireless services.
Geographic Coverage and Administrative Jurisdiction
The 90 code covers parts of counties Roscommon, Galway, Westmeath, and Offaly. Key exchanges are located in Athlone (the largest town in the region), Ballinasloe, Portumna, and Roscommon town. The area is a mix of urban centers and dispersed rural communities, typical of Ireland's midland counties.
Dialing Formats
When calling a number within the 90 area code from another part of Ireland, you must dial the full national number, which includes the leading '0' and the area code: 090 followed by the 7-digit local number. For example, a number in Athlone might be 090 647 1234.
For international callers, the format is: +353 90 followed by the local number, omitting the leading '0'. So, the same number would be dialed as +353 90 647 1234.
Local vs. International Caller Instructions
- Local callers (within Ireland): Always dial the full national number, including the '0' and the area code, even when calling from a number within the same area. This is because Ireland uses a closed numbering plan for geographic numbers.
- International callers: Dial the international access prefix (e.g., '00' from most countries), then the country code 353, then the area code 90 (without the leading '0'), and then the local number.
Overlay and Numbering Considerations
There is no overlay code for the 90 area. The code is exclusively assigned to this geographic region. However, due to number portability, a number with the 090 prefix may be routed to a different geographic location or even to a mobile or VoIP service, but the number remains associated with the original geographic area for billing and administrative purposes.
In recent years, ComReg has mandated that all geographic numbers, including those in the 90 range, must be capable of being used for VoIP services, but the numbering resource remains tied to the geographic area.