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Summary IP address summary information Name
Core-Backbone GmbH Country
Website
Hosted domains
100,598 IPv4 addresses
7,168 IPv6 addresses
6.34 × 1029 ASN type
Hosting Registry
RIPE Allocated
15 years ago on Feb 7, 2011 Updated
1 year ago on Jun 25, 2025
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS51191
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 AS51191 at robtex .
Products Products
Data Data
Why IPinfo? Why IPinfo?
Resources Resources
Traceroute Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f2 -m10 130.185.105.21
traceroute to 130.185.105.21 (130.185.105.21 ): 10 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Strasbourg, FR
On September 17, 2026
Places IPs in this network linked to physical places, based on their Wi-Fi networks.
Places IPs 1 1 New IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.
Explore Places There are 4 peers for this ASN.
There are 4 upstreams for this ASN.
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS51191 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 96%
Held location over 1 year 95%
Median days between moves 114 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 100,598 domain names hosted across 126 IP addresses on this ASN.
Pingable IPs 269 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 2a06:4b01:3353::1 Ping AS51191 Core-Backbone GmbH #36,770 0.48ms from Amsterdam, NL 2a06:4b01:332d::1 Ping AS51191 Core-Backbone GmbH #36,770 0.45ms from Amsterdam, NL 2a06:4b01:336f::1 Ping AS51191 Core-Backbone GmbH #36,770 0.46ms from Amsterdam, NL 2a06:4b01:3351::1 Ping AS51191 Core-Backbone GmbH #36,770 0.45ms from Amsterdam, NL 2a06:4b01:3356::1 Ping AS51191 Core-Backbone GmbH #36,770 0.44ms from Amsterdam, NL 2a06:4b01:3321::1 Ping AS51191 Core-Backbone GmbH #36,770 0.39ms from Amsterdam, NL 2a06:4b01:331e::1 Ping AS51191 Core-Backbone GmbH #36,770 0.47ms from Amsterdam, NL 2a06:4b01:355a::1 Ping AS51191 Core-Backbone GmbH #36,770 0.61ms from London, GB 2a06:4b01:3552::1 Ping AS51191 Core-Backbone GmbH #36,770 1.11ms from London, GB 2a06:4b01:353e::1 Ping AS51191 Core-Backbone GmbH #36,770 1.05ms from London, GB
Show more
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Netblock Company Num of IPs Core-Backbone GmbH
2,048 Core-Backbone GmbH
2,048 Core-Backbone GmbH
1,024 Core-Backbone GmbH
1,024 Core-Backbone GmbH
512 Core-Backbone GmbH
256 Core-Backbone GmbH
256 Core-Backbone GmbH
256
Times shown in Germany local time (UTC+1). Less More
Peak hour 12:00–13:00
Active hours 24 hrs (around the clock)
Weekend vs weekday weekdays heavier
Busiest day Fri
Network type Hosting / Cloud
Geography Germany 
Public Space