Ireland
IP address space, AS numbers and the largest networks registered in Ireland, based on the delegation records of the regional internet registries.
IPv4 addresses
10M
731 blocks
IPv6 allocations
213
AS numbers
289
Routed AS numbers
206
Largest networks in Ireland
By announced prefixes| AS | Name | IPv4 prefixes | IPv6 prefixes |
|---|---|---|---|
| AS43515 | YOUTUBE Google Ireland Limited | 190 | 39 |
| AS15502 | Vodafone-Ireland-ASN Vodafone Ireland Limited | 218 | 0 |
| AS207266 | AFiLIAS-SECONDARY-DNS Identity Digital Limited | 83 | 83 |
| AS211439 | locotorpi Jurgita Jurgaitiene trading as LOCOTORPI | 85 | 0 |
| AS13280 | H3GIE Three Ireland (Hutchison) limited | 70 | 0 |
| AS31122 | DIGIWEB-AS Digiweb ltd | 45 | 6 |
| AS207044 | ENET-AS Enet Telecommunications Networks Limited | 26 | 17 |
| AS201000 | WHIZZY-FTTX Js Whizzy Internet Limited | 33 | 6 |
| AS30900 | WEBWORLD-AS Sternforth Ltd. trading as WebWorld | 34 | 2 |
| AS44786 | ADOBE-IRELAND-AS Adobe Systems Software Ireland Ltd | 36 | 0 |
| AS39122 | BLACKNIGHT-AS Blacknight Internet Solutions Limited | 23 | 6 |
| AS47870 | SNCR-ASN SYNCHRONOSS SOFTWARE IRELAND, LTD | 13 | 15 |
| AS5466 | EIRCOM Eircom Limited | 25 | 3 |
| AS60924 | ORIXCOM Orixcom Limited | 22 | 3 |
| AS56410 | HOST-IRELAND-AS Leeson Telecom Holdings Ltd | 22 | 1 |
| AS24675 | LGCSB-AS Irish Government | 20 | 0 |
| AS34245 | MAGNET-AS Magnet Networks Limited | 18 | 2 |
| AS42227 | AIRWIRE-AS Airwire Ltd | 17 | 1 |
| AS1213 | Asiera ASIERA TECHNOLOGY SERVICES CLG | 17 | 1 |
| AS12372 | Cubic-Telecom Cubic Telecom Limited | 8 | 10 |
| AS2110 | AS-BTIRE Enet Communications LIMITED | 16 | 2 |
| AS47720 | CIX-AS Cork Internet Exchange Limited | 14 | 3 |
| AS213576 | ERTIUS-NET Robert Weir | 2 | 14 |
| AS51173 | PBB Premier Data Networks LTD | 13 | 0 |
| AS51677 | HETG-AS Hibernia Services Limited | 13 | 0 |
| AS48305 | NORAINA-EU Noraina Ltd | 7 | 5 |
| AS31128 | SHAZAM-AS Apple Distribution International Ltd. | 8 | 4 |
| AS2647 | ORANGE-BUSINESS-NAM Orange Business Communications Technology Limited | 12 | 0 |
| AS44212 | ADELPHINET1-AS Adelphi Net1 Ltd | 7 | 4 |
| AS16171 | STRENCOM Fulnett Limited | 9 | 1 |
Delegations by registry: RIPE 938, ARIN 4, APNIC 2. Updated 2026-10-05.