AS number details

AS2603

NORDUnet  ·  nordu.net

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AS2603 – NORDUnet

Field Value
Country Denmark
Website nordu.net
Hosted domains 50
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 7 days ago on Oct 16, 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
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WHOIS Details


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

                                            
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Hosted Domains

There are 50 domain names hosted across 15 IP addresses on this ASN.

IP Address Domain Domains on this IP
109.105.110.44 █████████ 19
109.105.117.8 ██████████ 13
109.105.110.120 ██████████ 11
109.105.110.65 ██████████ 10
192.36.171.213 █████████ 2
109.105.110.39 ██████████ 2
109.105.116.199 ██████████ 2
192.36.171.18 ██████████ 1
192.36.171.231 ██████████ 1
192.36.171.17 ██████████ 1

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Useful for Cybersecurity

Peers

There are 189 peers for this ASN.

Peers Name
AS1103 SURF B.V.
AS11039 The George Washington University
AS1136 KPN B.V.
AS1140 Stichting Internet Domeinregistratie Nederland
AS11537 Internet2
AS12389 PJSC Rostelecom
AS12552 GlobalConnect AB
AS1257 Tele2 Sverige AB
AS1267 WIND TRE S.P.A.
AS12713 OTEGlobe
AS1273 Vodafone Group PLC
AS12779 IT.Gate S.p.A.
AS12859 BIT BV
AS12969 Vodafone Iceland
AS1299 Arelion Sweden AB
AS12996 Domeneshop AS
AS13030 Init7 (Switzerland) Ltd.
AS13194 Bite IP Network
AS132337 Axclusive
AS13237 euNetworks GmbH
AS13335 Cloudflare, Inc.
AS140627 OneQode
AS14537 Continent 8 LLC
AS14907 Wikimedia Foundation Inc.
AS15412 FLAG TELECOM UK LIMITED
AS15474 Rannsokna- og haskolanet Islands hf.
AS15703 TrueServer BV AS number
AS16086 DNA Oyj
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
AS19151 BroadbandONE, LLC
AS19754 The Fusion Network, LLC
AS198093 Foreningen for digitala fri- och rattigheter
AS199524 G-Core Labs S.A.
AS2027 MilkyWan Association
AS20473 The Constant Company, LLC
AS20514 Axians AB
AS205206 Netsite A/S
AS20562 Broadband Hosting B.V.
AS20764 CJSC RASCOM
AS20932 Services Industriels de Geneve
AS20965 GEANT Vereniging
AS2116 GLOBALCONNECT AS
AS2119 Telenor Norge AS
AS21320 GEANT Vereniging
AS21700 Neptune Networks, LLC
AS224 SIKT - KUNNSKAPSSEKTORENS TJENESTELEVERANDOR
AS24482 SG.GS
AS24743 Snerpa ehf
AS24961 WIIT AG
AS2497 Internet Initiative Japan Inc.
AS25091 IP-Max SA
AS25160 Vorboss Limited
AS25220 equada network GmbH
AS25369 Hydra Communications Ltd
AS25509 Hringidan ehf / Vortex Inc
AS27552 TowardEX Technologies International, Inc.
AS2832 Vetenskapsradet / SUNET
AS2847 Kauno Technologijos Universitetas
AS28716 Retelit Digital Services S.p.A.
AS28917 Fiord Networks, UAB
AS2907 Research Organization of Information and Systems, National Institute of Informatics
AS29075 IELO Main Network
AS2914 NTT America, Inc.
AS29140 Hostserver GmbH
AS293 ESnet
AS29689 Origo ehf
AS29695 Altibox AS
AS30781 Free Pro SAS
AS30818 Advania Island ehf
AS30844 Liquid Telecommunications Ltd
AS30880 SpaceDump IT AB
AS31027 GlobalConnect A/S
AS31122 Digiweb ltd
AS31133 PJSC MegaFon
AS3170 VeloxServ Communications Ltd
AS3214 xTom GmbH
AS3216 PJSC "Vimpelcom"
AS3221 EENet
AS32590 Valve Corporation
AS3267 SCIENTIFIC RESEARCH INSTITUTE FOR SYSTEM ANALYSIS OF THE NATIONAL RESEARCH CENTRE "KURCHATOV INSTITUTE"
AS3301 Telia Company AB
AS3303 Swisscom (Switzerland) Ltd
AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS33891 Core-Backbone GmbH
AS3399 Obenet AB
AS34019 Hivane Association
AS34177 CELESTE SAS
AS34288 Kantonsschule Zug
AS34549 meerfarbig GmbH & Co. KG
AS3491 PCCW Global, Inc.
AS35280 F5 Networks SARL
AS35710 weber.digital GmbH
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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
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Downstreams

There are 16 downstreams for this ASN.

Downstreams Name
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"
AS39590 NORDUnet
AS6461 Zayo Bandwidth
AS6509 CANARIE Inc
AS8501 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
AS8674 Netnod AB
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Pingable IPs

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

IP Address ASN Details
2001:948:8:1::1 AS2603 NORDUnet 0.52ms from Frankfurt am Main, DE
109.105.110.50 AS2603 NORDUnet 3.16ms from Skanderborg, DK
2001:948:7:2::165 AS2603 NORDUnet 0.55ms from Stockholm, SE
109.105.121.53 AS2603 NORDUnet 0.71ms from Stockholm, SE
2001:948:a::15 AS2603 NORDUnet 0.53ms from Stockholm, SE
109.105.101.51 AS2603 NORDUnet 0.48ms from Frankfurt am Main, DE
109.105.112.236 AS2603 NORDUnet 3.95ms from Skanderborg, DK
193.11.3.30 AS2603 NORDUnet 0.47ms from Stockholm, SE
193.10.254.131 AS2603 NORDUnet 3.19ms from Skanderborg, DK
109.105.99.18 AS2603 NORDUnet 0.45ms from Stockholm, SE
2001:948:0:bad:c0de::28 AS2603 NORDUnet 0.43ms from Chicago, US
109.105.106.10 AS2603 NORDUnet 3.66ms from Skanderborg, DK
109.105.117.32 AS2603 NORDUnet 2.95ms from Skanderborg, DK
2001:948:380::4 AS2603 NORDUnet 5.24ms from Tønder, DK
2001:948:1:2::3 AS2603 NORDUnet 0.43ms from Ashburn, US
109.105.122.1 AS2603 NORDUnet 3.36ms from Skanderborg, DK
109.105.113.42 AS2603 NORDUnet 0.48ms from Stockholm, SE
2001:948:3:9::2 AS2603 NORDUnet 0.60ms from London, GB
109.105.118.212 AS2603 NORDUnet 2.98ms from Skanderborg, DK
2001:948:6:200::1:1 AS2603 NORDUnet 0.60ms from Stockholm, SE
193.10.252.66 AS2603 NORDUnet 0.41ms from Stockholm, SE
109.105.120.65 AS2603 NORDUnet 0.51ms from London, GB
109.105.116.209 AS2603 NORDUnet 3.23ms from Skanderborg, DK
109.105.102.97 AS2603 NORDUnet 0.54ms from London, GB
194.68.13.41 AS2603 NORDUnet 0.63ms from Stockholm, SE

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
68.131.104.75 AS701 Verizon Business 8.57ms from Ashburn, US
103.146.160.139 AS139892 Metropolitan Waterworks Authority 3.46ms from Bangkok, TH
88.130.69.251 AS8881 1&1 Versatel Deutschland GmbH 2.85ms from Duesseldorf, DE
61.164.95.203 AS4134 CHINANET-BACKBONE 6.03ms from Hangzhou, CN
42.114.189.43 AS18403 FPT Telecom Company 9.45ms from Hanoi, VN
60.175.3.75 AS4134 CHINANET-BACKBONE 9.90ms from Huai'an, CN
87.109.200.187 AS25019 Saudi Telecom Company JSC 8.09ms from Jeddah, SA
176.37.186.139 AS39608 Lanet Network Ltd 0.61ms from Kyiv, UA
92.24.140.27 AS13285 TalkTalk Communications Limited 4.25ms from London, GB
74.69.182.43 AS11351 Charter Communications Inc 9.52ms from New York City, US
88.185.169.171 AS12322 Free SAS 4.68ms from Paris, FR
27.214.207.75 AS4837 CHINA UNICOM China169 Backbone 4.96ms from Qingdao, CN
157.131.251.219 AS46375 Sonic Telecom LLC 2.23ms from San Jose, US
61.83.128.171 AS4766 Korea Telecom 7.87ms from Seoul, KR
172.76.159.11 AS5650 Frontier Communications of America, Inc. 13.64ms from Ashburn, US
181.111.7.219 AS7303 Telecom Argentina S.A. 1.38ms from Buenos Aires, AR
27.74.148.219 AS7552 Viettel Group 2.68ms from Ho Chi Minh City, VN
122.159.242.75 AS4837 CHINA UNICOM China169 Backbone 15.31ms from Liaoyang, CN
176.251.207.59 AS5607 Sky UK Limited 11.48ms from London, GB
94.6.199.139 AS5607 Sky UK Limited 1.57ms from London, GB
108.30.106.59 AS701 Verizon Business 2.82ms from New York City, US
24.17.20.187 AS7922 Comcast Cable Communications, LLC 4.11ms from Seattle, US
202.172.128.11 AS134189 Alpha Dot Net Australia Pty Ltd 0.31ms from Sydney, AU
113.42.213.155 AS17506 ARTERIA Networks Corporation 1.07ms from Tokyo, JP
105.96.169.203 AS36947 Telecom Algeria 14.21ms from Algiers, DZ

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f2 109.105.101.75
traceroute to 109.105.101.75 (109.105.101.75): 64 hops max, 52 byte packets
2 [] 91.200.241.140 0.186 ms
Measurement taken from IPinfo ProbeNet in London, GB
On

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.

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