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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 AS41491 at robtex .
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Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f3 -m14 81.28.130.78
traceroute to 81.28.130.78 (81.28.130.78 ): 14 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Nicosia, CY
On November 5, 2026
Netblock Company Num of IPs Stadtwerke Kapfenberg GmbH
8,192 Stadtwerke Kapfenberg GmbH
4,096 Stadtwerke Kapfenberg GmbH
2,048 Stadtwerke Kapfenberg GmbH
1,024
Powered by IP Ranges data There are 2 upstreams for this ASN.
ASN Name Rank AS174 Cogent Communications, LLC #7 AS25255 ==> TELE2 AUSTRIA <== #454
There are 1 downstreams for this ASN.
ASN Name Rank AS212682 Pankl Racing Systems AG #69,484
Important routers in AS41491 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 81%
Held location over 1 year 85%
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 40 domain names hosted across 23 IP addresses on this ASN.
39 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 81.28.138.237 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 9.15ms from Vienna, AT 5.44.211.193 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 8.64ms from Vienna, AT 85.238.176.73 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 8.82ms from Vienna, AT 5.44.213.219 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 9.47ms from Vienna, AT 185.125.210.99 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 4.00ms from Vienna, AT 85.238.161.89 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 3.91ms from Vienna, AT 81.28.128.52 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 3.81ms from Vienna, AT 185.125.208.247 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 4.06ms from Vienna, AT 85.238.188.129 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 8.77ms from Vienna, AT 185.125.209.240 Ping AS41491 Stadtwerke Kapfenberg GmbH #9,304 4.05ms from Vienna, AT
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A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
IPs in this network linked to physical places, based on their Wi-Fi networks.
Places IPs 27 5 5 4 Category In AS41491 Example IP
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There are 37 peers for this ASN.
Times shown in Austria local time (UTC+1). Less More
Peak hour 19:00–20:00
Active hours 20 hrs
Weekend vs weekday balanced week
Busiest day Mon
Network type Consumer ISP
Geography Austria
Neighbours by global rank Log scale. The dashed line marks this network.
New IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.
Explore Places AS174 Cogent Communications, LLC #7
AS1239 Cogent Communications, LLC
AS3212 Telemach Slovenija d.o.o. #617
AS3303 Swisscom (Switzerland) Ltd #210
AS6663 Euroweb Romania S.R.L. #591
AS6720 Magistrat der Stadt Wien, Magistratsabteilung 01 #37,572
AS8218 Zayo Infrastructure France SA #740
Restaurant
Home Services
Hotel