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Summary IP address summary information Name
Eircom Limited Country
Website
Hosted domains
2 IPv4 addresses
24,832 IPv6 addresses
6.34 × 1029 ASN type
ISP Registry
RIPE Allocated
56 years ago on Jan 1, 1970 Updated
8 months ago on Jan 9, 2026
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS15751
What is an ASN? Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS15751 at robtex .
Products Products
Data Data
Why IPinfo? Why IPinfo?
Resources Resources
Major ISP Stub AS
Major ISP Stub AS
Traceroute Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f3 -m13 109.125.43.240
traceroute to 109.125.43.240 (109.125.43.240 ): 13 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Lisbon, PT
On September 10, 2026
Netblock Company Num of IPs Eircom Limited
16,384 Eircom Limited
4,096 Eircom Limited
2,048 Eircom Limited
1,024 Eircom Limited
512 Eircom Limited
512 Eircom Limited
256
Powered by IP Ranges data
There are 1 peers for this ASN.
ASN Name Rank AS5466 Eircom Limited #399
There are 1 upstreams for this ASN.
ASN Name Rank AS5466 Eircom Limited #399
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS15751 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 77%
Held location over 1 year 90%
Median days between moves 70 days
Geolocation scope National How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 2 domain names hosted across 2 IP addresses on this ASN.
Pingable IPs 17 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 2a01:b340:63:4677:14d6:87ea:c9b4:cd9 Ping AS15751 Eircom Limited #7,049 18.95ms from Dublin, IE 2a01:b340:83:89ec:6d91:620e:c29b:2ac8 Ping AS15751 Eircom Limited #7,049 24.02ms from Dublin, IE 2a01:b340:f:9::1 Ping AS15751 Eircom Limited #7,049 0.78ms from Dublin, IE 212.129.67.124 Ping AS15751 Eircom Limited #7,049 0.74ms from Dublin, IE 2a01:b340:62:1f63:c559:bfdf:e9a6:d1b3 Ping AS15751 Eircom Limited #7,049 11.54ms from Dublin, IE 2a01:b340:61:43ac:63cb:2ce4:82c7:dc93 Ping AS15751 Eircom Limited #7,049 18.83ms from Dublin, IE 2a01:b340:60:c475:5ef6:f852:e68c:c15d Ping AS15751 Eircom Limited #7,049 87.16ms from Dublin, IE 2a01:b340:84:910:b846:e965:c426:112 Ping AS15751 Eircom Limited #7,049 19.72ms from Dublin, IE 2a01:b340:85:ae41:f26a:aee2:78ec:384 Ping AS15751 Eircom Limited #7,049 14.32ms from Dublin, IE 212.129.64.190 Ping AS15751 Eircom Limited #7,049 0.79ms from Dublin, IE
Show more
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Times shown in Ireland local time (UTC). Less More
Peak hour 12:00–13:00
Active hours 20 hrs
Weekend vs weekday balanced week
Busiest day Sat
Network type Consumer ISP
Geography Ireland 
