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ASN Lookup Tool
AS2603 NORDUNET

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS2603
Organisation
NORDUnet
Name
NORDUNET
Total IPv4 Addresses
9,698
Total IPv4 Prefixes
26
Total IPv6 Prefixes
13
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#9,632 out of 79,632
Registry
Ripe
Registered Country
DK flagDK
Registered Country Name
Denmark
Registered Date
2002-05-07
Registration Last Change
2026-02-14
Receiving From
ASN
Organisation
AS33891
DE flagCore-Backbone GmbH
AS7029
US flagWindstream Communications LLC
AS4230
BR flagCLARO S.A.
AS2914
US flagNTT America, Inc.
AS852
CA flagTELUS Communications Inc.
Showing 5 of 71
Transit To
ASN
Organisation
AS1103
NL flagSURF B.V.
AS224
NO flagSIKT - KUNNSKAPSSEKTORENS TJENESTELEVERANDOR
AS1741
FI flagCSC - Tieteen tietotekniikan keskus Oy
AS1653
SE flagVetenskapsradet / SUNET
AS1835
EU flagForskningsnettet - Danish network for Research a..
Showing 5 of 17
IPv4 Active Prefixes
PrefixRange FromRange To
109.105.96.0/20109.105.96.0109.105.111.255
109.105.112.0/21109.105.112.0109.105.119.255
109.105.120.0/24109.105.120.0109.105.120.255
109.105.121.0/25109.105.121.0109.105.121.127
109.105.121.128/26109.105.121.128109.105.121.191
Showing 5 of 26
IPv6 Active Prefixes
PrefixRange FromRange To
2001:948::/422001:948::2001:948:3f:ffff:ffff:ffff:ffff:ffff
2001:948:80::/412001:948:80::2001:948:ff:ffff:ffff:ffff:ffff:ffff
2001:948:100::/402001:948:100::2001:948:1ff:ffff:ffff:ffff:ffff:ffff
2001:948:200::/392001:948:200::2001:948:3ff:ffff:ffff:ffff:ffff:ffff
2001:948:400::/382001:948:400::2001:948:7ff:ffff:ffff:ffff:ffff:ffff
Showing 5 of 13