TDC Holding A/S

Data as of 2026-08-30
GLEIF verified
Complete entity footprint
5 linked clusters · 64,395 netblocks · 5,275,915 IPv4 addresses · 191 IPv6 prefixes
This organisation's clusters combined by evidence — shared GLEIF corporate family and shared operating domain tdc.net — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
LEI
529900N96EOVRB114D28
Registered name
TDC Holding A/S
Jurisdiction
DK
Ultimate parent
DKT Holdings ApS
529900DQKWXN4TVCYP11
Cluster stats
Netblocks275 · 5,270,364 IPv4 addresses
IPv6 4 prefixes (largest 2001:6c8::/29)
Registered in Denmark (263) · Finland (30) · Russia (3) · Sweden (3) · United States (3) · Netherlands (1)
Cluster ID231987809
RegistryBGP
Owner jurisdictionDK
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 529900N96EOVRB114D28
Shared handles clustered on 34 shared RIR contact/maintainer handles
Registry names 22 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

10 weekly snapshots · JSON
308 -41 netblocks since 2026-07-05
2026-07-05 peak 349 2026-08-30

IP Ranges (275)

showing 50 of 275 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
2.21.28.0/22 TDC Holding A/S BGP ANNOUNCED ● low
2.104.0.0/14 TDC Holding A/S BGP ANNOUNCED ● low
2.104.0.0 – 2.109.255.255 TDC Holding A/S RIPE ALLOCATED PA ● low
2.108.0.0/15 TDC Holding A/S BGP ANNOUNCED ● low
2.110.0.0/20 TDC Holding A/S BGP ANNOUNCED ● low
2.110.16.0/22 TDC Holding A/S BGP ANNOUNCED ● low
2.110.32.0/20 TDC Holding A/S BGP ANNOUNCED ● low
2.111.0.0/16 TDC Holding A/S RIPE ALLOCATED PA ● low
5.44.136.0/24 TDC Holding A/S BGP ANNOUNCED ● low
5.44.136.0/21 TDC Holding A/S BGP ANNOUNCED ● low
45.65.84.0/22 TDC Holding A/S BGP ANNOUNCED ● low
46.231.209.224/30 TDC-LAN RIPE ASSIGNED PA ● low
46.231.210.220/30 TDC-LAN RIPE ASSIGNED PA ● low
46.231.211.84/30 TDC-LAN RIPE ASSIGNED PA ● low
62.80.203.0/24 TDC Holding A/S BGP ANNOUNCED ● low
62.80.205.0/24 TDC Holding A/S BGP ANNOUNCED ● low
62.135.128.0/17 TDC Holding A/S BGP ANNOUNCED ● low
62.236.79.0/24 TDC-FI-DIX RIPE ASSIGNED PA ● low
62.236.98.0/28 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.236.98.192/28 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.236.123.160/28 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.236.147.0/27 TDC-FI-UC-net1 RIPE ASSIGNED PA ● low
62.236.147.32/28 TDC-FI-UC-net2 RIPE ASSIGNED PA ● low
62.236.147.48/28 TDC-FI-UC-net5 RIPE ASSIGNED PA ● low
62.236.147.64/27 TDC-FI-UC-net3 RIPE ASSIGNED PA ● low
62.236.147.96/27 TDC-FI-UC-net4 RIPE ASSIGNED PA ● low
62.236.147.128/29 TDC-FI-UC-net6 RIPE ASSIGNED PA ● low
62.236.147.136/29 TDC-FI-UC-net7 RIPE ASSIGNED PA ● low
62.236.199.0/27 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.237.34.240/28 TDC-FI-UC-POC RIPE ASSIGNED PA ● low
62.237.35.240/28 TDC-FI-UC-POC RIPE ASSIGNED PA ● low
62.237.81.16/28 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.237.82.212/30 TDC-FI-DNS RIPE ASSIGNED PA ● low
62.237.86.232/29 TDC-FI-NTP RIPE ASSIGNED PA ● low
62.237.116.32/27 TDC-FI-ZOO RIPE ASSIGNED PA ● low
62.237.206.0/29 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.237.207.48/29 TDC-FI-SBC RIPE ASSIGNED PA ● low
62.242.0.0/15 TDC Holding A/S RIPE ALLOCATED PA ● low
62.243.122.0/24 TDC-CPE RIPE ASSIGNED PA ● low
62.243.132.0/28 TDC-DNS-LAN RIPE ASSIGNED PA ● low
80.62.0.0/15 TDC Holding A/S RIPE ALLOCATED PA ● low
80.91.128.0/20 TDC Holding A/S BGP ANNOUNCED ● low
80.160.0.0/13 TDC Holding A/S RIPE ALLOCATED PA ● low
80.196.0.0/14 TDC Holding A/S BGP ANNOUNCED ● low
80.245.100.0/22 TDC Holding A/S BGP ANNOUNCED ● low
81.31.80.0/20 TDC Holding A/S RIPE ALLOCATED PA ● low
83.88.0.0/13 TDC Holding A/S RIPE ALLOCATED PA ● low
83.88.0.0 – 83.94.63.255 TDC Holding A/S RIPE ALLOCATED PA ● low
83.88.0.0/14 TDC Holding A/S BGP ANNOUNCED ● low
83.92.0.0/15 TDC Holding A/S BGP ANNOUNCED ● low

IPv6 ranges (4)

CIDR
2001:6c8::/29
2a00:eec0::/32
2a0a:e700::/32
2001:67c:2ae0::/48

Domains hosted in this network

what's this?
tdc.net tdcsong.se keeponmoving.dk dinfestbutik.dk europa.eu imusic.ch dft-cdn42.net imusic.nz imusic.sg nflxso.net imusic.com.hk tele.dk sensusaccess.com googlevideo.com imusic.dk imusic.fr digitalpost.dk br.com

Customer-delegated space

how is this classified?
Unclassified 274 (99.6%)
Customer access pools 29 (10.5%)
Operator infrastructure (named) 5 (1.8%)

Corporate group (3 confirmed entities)

+10,386 additional unconfirmed candidates not shown — full list (JSON)

Network trust

what's this?
RPKI hygiene: C how networks compare →
64.9% of checked blocks have valid RPKI ROA coverage (200 of 308)
Possible discrepancies (1)

These blocks are registered to TDC Holding A/S but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

62.236.79.0/24 /24 authorized for AS16086 — DNA Oyj

NIC Handles

AKAM1-RIPE-MNT AS31027-MNT AS3257-IPAM-MNT AS3292 AS3292-MNT AS3292-MNT CSCDK-MNT DGCSYSTEMS-MNT DK-EKMNT DUMY-RIPE DUMY-RIPE EUROCONNECT +22 more