AS5466 EIRCOM Eircom Limited

EIRCOM Eircom Limited · registered in Ireland

IPv4 addresses1,110,52832 prefixes · 0.035% of announced IPv4

Rank in Ireland#2largest network in IE by IPv4 space, of 197 · 20.84% of IE

Rank worldwide#334of 79,396 networks with IPv4

IPv68 x /32 (524,290 x /48)3 prefixes

CountryIreland209 ASNs registered there

Open AS5466 in ASN lookup Look up an IP in this network (51.171.0.1) All networks in Ireland

IPv4 prefixes

All 32 prefixes, in address order.

51.171.0.0/16
62.77.160.0/19
82.141.192.0/18
83.70.0.0/15
83.174.160.0/19
86.40.0.0/13
89.204.208.0/20
95.44.0.0/15
95.83.240.0/21
159.134.0.0/17
159.134.128.0/18
159.134.192.0/19
159.134.224.0/20
159.134.240.0/21
159.134.248.0/23
159.134.250.0/24
159.134.251.0/24
159.134.252.0/22
178.255.216.0/24
185.57.112.0/22
185.61.0.0/22
185.109.4.0/22
185.202.16.0/22
192.107.110.0/24
194.106.128.0/19
194.125.128.0/18
194.125.192.0/19
195.7.32.0/19
213.94.128.0/17
213.190.128.0/19
213.191.224.0/21
217.183.0.0/16

IPv6 prefixes

All 3 prefixes.

2001:bb0::/29
2a09:2140::/48
2a09:2140:8000::/48

Similar-sized networks in Ireland

ASNNameIPv4 addresses

AS1213#1 Asiera ASIERA TECHNOLOGY SERVICES CLG1,843,200

AS15502#3 Vodafone-Ireland-ASN Vodafone Ireland Limited501,760

AS43515#4 YOUTUBE Google Ireland Limited384,512

AS2110#5 AS-BTIRE Enet Communications LIMITED243,456

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources