AS number details

AS2603

NORDUnet  ·  nordu.net

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

AS2603 – NORDUnet

Field Value
Country Denmark
Website nordu.net
Hosted domains 47
Number of IPv4 9,728
Number of IPv6 713,053,462,628,379,038,341,895,553,024
ASN type Education
Registry ripe
Allocated 23 years ago on May 07, 2002
Updated 16 days ago on Aug 04, 2025
Netblock Company Num of IPs
109.105.96.0/20 NORDUnet 4,096
109.105.112.0/21 NORDUnet 2,048
109.105.120.0/22 NORDUnet 1,024
185.174.116.0/22 NORDUnet 1,024
192.36.171.0/24 Services network 256
193.10.252.0/24 NORDUnet Backbone 256
193.10.254.0/24 NORDUnet Backbone 256
193.10.255.0/24 SUNET TUG 256
193.11.3.0/24 New combined NORDUnet/SUNET NOC network 256
194.68.13.0/24 NORDUnet Backbone 256
Netblock Company
2001:948::/29 NORDUnet
2001:948::/32 NORDUnet
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details


                                                ASHandle:       AS2603
                                                OrgID:          AS2603
                                                ASName:         AS2603
                                                ASNumber:       AS2603
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

                                            
Get this data and more with IPinfo's Whois product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.

Hosted Domains

There are 47 domain names hosted across 15 IP addresses on this ASN.

IP Address Domain Domains on this IP
109.105.110.44 █████████ 20
109.105.117.8 ██████████ 12
109.105.110.65 █████████ 10
109.105.110.120 ██████████ 10
109.105.110.39 ██████████ 2
109.105.116.199 ██████████ 2
109.105.110.58 ██████████ 1
109.105.100.184 ██████████ 1
109.105.100.182 ██████████ 1
192.36.171.231 ██████████ 1

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity

Peers

There are 490 peers for this ASN.

Peers Name
AS10099 China Unicom Global
AS10310 Oath Holdings Inc.
AS1103 SURF B.V.
AS11039 The George Washington University
AS11232 Midcontinent Communications
AS1136 KPN B.V.
AS1140 Stichting Internet Domeinregistratie Nederland
AS11537 Internet2
AS12129 123.Net, Inc.
AS12200 Rackspace Hosting
AS12301 Invitech ICT Services Kft.
AS12322 Free SAS
AS12389 PJSC Rostelecom
AS12390 KCOM GROUP LIMITED
AS12496 IDNet
AS12519 FastNet International Ltd
AS12552 GlobalConnect AB
AS1257 Tele2 Sverige AB
AS12578 SIA Tet
AS1267 WIND TRE S.P.A.
AS12678 Greysom Limited
AS12713 OTEGlobe
AS1273 Vodafone Group PLC
AS12775 JPC Infonet Ltd
AS12779 IT.Gate S.p.A.
AS12843 TelemaxX Telekommunikation GmbH
AS12859 BIT BV
AS12969 Vodafone Iceland
AS1299 Arelion Sweden AB
AS12996 Domeneshop AS
AS13009 Redcentric Solutions Ltd
AS13030 Init7 (Switzerland) Ltd.
AS13037 Zen Internet Ltd
AS13101 TNG Stadtnetz GmbH
AS13122 Manx Telecom Trading Ltd
AS13150 CATO NETWORKS LTD
AS13189 Lidero Network
AS13194 Bite IP Network
AS13213 UK-2 Limited
AS132337 Axclusive
AS13237 euNetworks GmbH
AS13335 Cloudflare, Inc.
AS13414 Twitter Inc.
AS13445 Cisco Webex LLC
AS13536 FirstLight Fiber, Inc.
AS136907 HUAWEI CLOUDS
AS137409 GSL Networks Pty LTD
AS13768 Aptum Technologies
AS14061 DigitalOcean, LLC
AS140627 OneQode
AS14361 HopOne Internet Corporation
AS14537 Continent 8 LLC
AS14773 Lancaster Lebanon Intermediate Unit 13
AS14840 BR.Digital Provider
AS14907 Wikimedia Foundation Inc.
AS15169 Google LLC
AS15412 FLAG TELECOM UK LIMITED
AS15474 Rannsokna- og haskolanet Islands hf.
AS15510 Compuweb Communications Services Limited
AS15659 NextGenTel AS
AS15703 TrueServer BV AS number
AS15766 Domicilium (IOM) Limited
AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
AS16082 Spitfire Network Services Limited
AS16086 DNA Oyj
AS16164 Sohonet Limited
AS16186 IP Group AS
AS16247 M247 Ltd
AS16353 Merula Limited
AS16509 Amazon.com, Inc.
AS1653 Vetenskapsradet / SUNET
AS16735 ALGAR TELECOM S/A
AS1741 CSC - Tieteen tietotekniikan keskus Oy
AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS18106 Viewqwest Pte Ltd
AS1828 Unitas Global
AS1835 Forskningsnettet - Danish network for Research and Education
AS1836 green.ch AG
AS1850 Internet a Islandi hf
AS19108 Optimum
AS19151 BroadbandONE, LLC
AS19551 Incapsula Inc
AS19679 Dropbox, Inc.
AS196881 Liberty-izone Ltd
AS197301 Parknet F.M.B.A.
AS19754 The Fusion Network, LLC
AS197898 Integrated Digital Services Ltd
AS198093 Foreningen for digitala fri- och rattigheter
AS198150 SIACOM JSC
AS198736 Stream Networks Ltd
AS199283 STRUCTURED COMMUNICATIONS LIMITED
AS199335 Talk Straight Ltd.
AS199468 GRAIN COMMUNICATIONS LIMITED
AS199524 G-Core Labs S.A.
AS199713 MLL Telecom Ltd.
AS199775 Connexin Limited
AS200260 Debugged Ltd
AS200612 Gulf Bridge International Inc.
AS201126 CDW Ltd
AS20115 Charter Communications LLC
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Upstreams

There are 8 upstreams for this ASN.

upstreams Name
AS1299 Arelion Sweden AB
AS2914 NTT America, Inc.
AS3491 PCCW Global, Inc.
AS6461 Zayo Bandwidth
AS6730 Sunrise GmbH
AS6762 TELECOM ITALIA SPARKLE S.p.A.
AS6830 Liberty Global B.V.
AS6939 Hurricane Electric LLC
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Downstreams

There are 20 downstreams for this ASN.

Downstreams Name
AS1103 SURF B.V.
AS15474 Rannsokna- og haskolanet Islands hf.
AS1653 Vetenskapsradet / SUNET
AS1741 CSC - Tieteen tietotekniikan keskus Oy
AS1835 Forskningsnettet - Danish network for Research and Education
AS198093 Foreningen for digitala fri- och rattigheter
AS21320 GEANT Vereniging
AS224 SIKT - KUNNSKAPSSEKTORENS TJENESTELEVERANDOR
AS2832 Vetenskapsradet / SUNET
AS2847 Kauno Technologijos Universitetas
AS3221 EENet
AS3267 SCIENTIFIC RESEARCH INSTITUTE FOR SYSTEM ANALYSIS OF THE NATIONAL RESEARCH CENTRE "KURCHATOV INSTITUTE"
AS3491 PCCW Global, Inc.
AS39590 NORDUnet
AS6461 Zayo Bandwidth
AS6509 CANARIE Inc
AS6762 TELECOM ITALIA SPARKLE S.p.A.
AS6830 Liberty Global B.V.
AS8501 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
AS8674 Netnod AB
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Pingable IPs

45 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
2001:948:feed:: AS2603 NORDUnet 9.10ms from Falkenberg, SE
2001:948:7:2::163 AS2603 NORDUnet 0.54ms from Stockholm, SE
109.105.100.183 AS2603 NORDUnet 2.11ms from Copenhagen, DK
2001:948:4:6::124 AS2603 NORDUnet 0.51ms from Stockholm, SE
109.105.116.208 AS2603 NORDUnet 1.71ms from Copenhagen, DK
2001:948:2:40::1 AS2603 NORDUnet 0.47ms from Amsterdam, NL
109.105.112.236 AS2603 NORDUnet 2.89ms from Copenhagen, DK
2001:948:380::4 AS2603 NORDUnet 8.63ms from Falkenberg, SE
192.36.171.100 AS2603 NORDUnet 0.53ms from Stockholm, SE
193.10.252.66 AS2603 NORDUnet 0.46ms from Stockholm, SE
193.10.254.131 AS2603 NORDUnet 1.24ms from Copenhagen, DK
109.105.113.4 AS2603 NORDUnet 0.49ms from Stockholm, SE
2001:948:0:bad:c0de::28 AS2603 NORDUnet 0.44ms from Chicago, US
109.105.106.9 AS2603 NORDUnet 1.38ms from Copenhagen, DK
185.174.118.1 AS2603 NORDUnet 4.18ms from Skanderborg, DK
109.105.98.229 AS2603 NORDUnet 0.43ms from Amsterdam, NL
109.105.102.90 AS2603 NORDUnet 0.52ms from London, GB
109.105.121.53 AS2603 NORDUnet 0.73ms from Stockholm, SE
2001:948:a::15 AS2603 NORDUnet 0.57ms from Stockholm, SE
109.105.97.73 AS2603 NORDUnet 0.43ms from Frankfurt am Main, DE
109.105.104.131 AS2603 NORDUnet 0.56ms from Stockholm, SE
109.105.114.9 AS2603 NORDUnet 0.65ms from Stockholm, SE
109.105.117.145 AS2603 NORDUnet 0.73ms from Copenhagen, DK
2001:948:100:1::148 AS2603 NORDUnet 9.65ms from Falkenberg, SE
2001:948:3:9::2 AS2603 NORDUnet 0.58ms from London, GB

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
67.130.75.251 AS209 CenturyLink Communications, LLC 3.14ms from Denver, US
187.60.121.75 AS28652 Telecomunicações Nordeste Ltda. 12.65ms from Fortaleza, BR
158.220.174.11 AS212795 Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. 1.10ms from Frankfurt am Main, DE
123.154.165.251 AS4837 CHINA UNICOM China169 Backbone 12.16ms from Hangzhou, CN
223.17.36.107 AS9304 HGC Global Communications Limited 1.16ms from Hong Kong, HK
166.1.153.43 AS62240 Clouvider 0.20ms from London, GB
47.61.178.187 AS12430 VODAFONE ESPANA S.A.U. 2.10ms from Madrid, ES
75.219.230.139 AS6167 Verizon Business 11.44ms from New York City, US
88.180.160.155 AS12322 Free SAS 4.99ms from Paris, FR
68.108.211.11 AS22773 Cox Communications Inc. 5.18ms from Phoenix, US
122.40.120.91 AS17858 LG POWERCOMM 2.03ms from Seoul, KR
13.61.82.107 AS16509 Amazon.com, Inc. 0.13ms from Stockholm, SE
111.51.153.123 AS9808 China Mobile Communications Group Co., Ltd. 10.34ms from Wuwei, CN
84.239.13.27 AS44679 INVITE Systems SRL 3.87ms from Bucharest, RO
216.18.173.11 AS29789 Reflected Networks, Inc. 0.75ms from Chicago, US
3.133.18.59 AS16509 Amazon.com, Inc. 0.09ms from Columbus, US
113.165.170.235 AS45899 VNPT Corp 2.68ms from Da Nang, VN
84.164.150.155 AS3320 Deutsche Telekom AG 5.91ms from Frankfurt am Main, DE
109.254.194.251 AS20590 Donbass Electronic Communications Ltd. 8.95ms from Krasnodar, RU
115.210.235.43 AS4134 CHINANET-BACKBONE 8.06ms from Nanchang, CN
67.169.248.59 AS7922 Comcast Cable Communications, LLC 3.88ms from Salt Lake City, US
47.33.2.251 AS20115 Charter Communications LLC 10.53ms from San Jose, US
121.78.147.27 AS17589 GABIA Inc. 0.13ms from Seoul, KR
54.168.167.139 AS16509 Amazon.com, Inc. 0.20ms from Tokyo, JP
119.99.139.251 AS4134 CHINANET-BACKBONE 3.66ms from Wuhan, CN

Related Networks

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 AS2603 at robtex.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs