AS209424 — FASTSPEED

AS209424 announces 2 IPv4 prefixes covering 2,048 addresses and 1 IPv6 prefixes.

About this network

The AS handle FASTSPEED is operated by Fastspeed A/S.

What it's used for

• The address space carries residential broadband traffic, evidenced by reverse DNS entries such as 0x934e1d00.cust.fastspeed.dk and 0xb9e59900.cust.fastspeed.dk.
• The network announces 2048 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a pure access network rather than a transit provider.
• Traffic consists of subscriber eyeballs accessing the internet via Fastspeed's fiber and cable infrastructure in Denmark.

Notable

• Registrants for both announced prefixes are listed as "Fastspeed Net" and "FASTSPEED A/S", consistent with the AS holder.
• Fastspeed was founded in 2019 by former TDC directors and has since expanded its reach by securing fiber access agreements with TDC Net.
• The inventory consists of two /22 IPv4 blocks and a single /29 IPv6 block, all located in Denmark.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 147.78.28.0/22
• 185.229.152.0/22
• 2a09:5e40::/29

Upstream networks

• AS3292 TDC Holding A/S

Adjacent networks

• AS3292 TDC Holding A/S

Routing security

• RPKI: 0 valid, 0 invalid and 3 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3 route objects.
• Listed in as-sets: AS-TDCNETDK.