asn.dev

Autonomous system

AS50757 NUUDAY-IP-CORE

Unclassified RIPE

IPv4 addresses 768 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly DK
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Nuuday

Denmark · AI-generated

telecom residential business denmark

The AS handle NUUDAY-IP-CORE is held by Nuuday, the Danish telecommunications group formerly known as TDC.

What it's used for

  • The address space carries corporate and cloud infrastructure, evidenced by the netname TDC-Erhverv-Cloud-Infrastructure and registrants referencing TDC Brands A/S and Nuuday Admin.
  • The AS announces 768 IPv4 addresses across 3 prefixes with only 1 observed neighbour, a ratio indicating an access or internal corporate network rather than a transit provider.
  • Traffic from this AS consists of subscriber eyeballs and business cloud endpoints for brands including YouSee, TDC Erhverv, Telmore, Hiper, eesy, and Relatel.

Notable

  • Registrants consistently identify the holder as Nuuday or TDC Brands A/S, aligning with the AS announcer.
  • Nuuday is the rebranded name for TDC, Denmark's largest telecommunications company, which operates multiple consumer and business brands under one corporate umbrella.
  • The inventory consists of three /24 prefixes, all located in Denmark, with no IPv6 prefixes announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3292TDC Holding A/S177

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 3 prefixes · 768 addresses IPv6 0 prefixes

CountryNamePrefixes
DKDenmark3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS50757
Registry name
NUUDAY-IP-CORE
Registrant
mnt-dk-nuuday-1
Abuse contact
abusemail@nuuday.dk
Registered
2022-06-03
Last changed
2022-06-03
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 3 valid, 0 with no ROA
ROAs
3 authorising AS50757
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
5 naming AS50757

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 445 networks and 1,817 prefixes, as published 2026-10-27. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check