AS51815 — TEKNIKBYRAN Kustbandet AB

AS51815 announces 17 IPv4 prefixes covering 14,336 addresses and 7 IPv6 prefixes.

About this network

TEKNIKBYRAN is operated by Teknikbyran i Sverige AB, a regional cable and DSL provider in Sweden.

What it's used for

• The address space carries residential and business customer traffic, evidenced by the reverse DNS record tb78-108-53-254.cust.teknikbyran.com and netnames such as SE-KUSTBANDET-20070612 and SE-KUSTBANDET-20110531.
• The AS announces 14,336 IPv4 addresses across 17 prefixes and 7 IPv6 prefixes, while maintaining only 7 observed routing neighbours. This high address-to-neighbour ratio indicates an access network rather than a transit provider.
• Traffic from this AS consists of subscriber eyeballs for cable and DSL services, consistent with the operator's classification as a regional ISP.

Notable

• Registrants for the majority of prefixes are listed as Kustbandet AB, which aligns with the historical identity of the operator before the rebrand to Teknikbyran.
• The address inventory includes a mix of legacy and newer blocks, with some prefixes registered to third parties such as WEBBFABRIKEN LTD and OCTN Networks AB, suggesting leased space or post-acquisition holdings.
• The AS was first seen in routing tables in 2011, indicating a relatively recent establishment in the global routing table.

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

Announced prefixes

• 62.102.148.0/23
• 62.102.151.0/24
• 78.108.48.0/21
• 91.190.136.0/21
• 91.208.81.0/24
• 91.209.88.0/24
• 91.226.177.0/24
• 91.226.180.0/24
• 176.56.240.0/20
• 185.31.196.0/22
• 185.152.213.0/24
• 185.170.180.0/22
• 185.196.152.0/22
• 192.121.99.0/24
• 192.121.137.0/24
• 193.234.4.0/24
• 194.103.41.0/24
• 2001:67c:5f4::/48
• 2001:67c:19a4::/48
• 2a00:1520::/32
• 2a02:2490::/32
• 2a03:9ea0::/32
• 2a0a:b780::/29
• 2a0b:b40::/29

Upstream networks

• AS3399 Obenet AB

Downstream networks

• AS57131 IP Osteraker AB
• AS60582 Winther Wireless AB
• AS60662 DataCom Group Nordic AB
• AS56700 Osterakers Kommun
• AS60184 OCTN Networks AB

Adjacent networks

• AS3399 Obenet AB
• AS57131 IP Osteraker AB
• AS60582 Winther Wireless AB
• AS60662 DataCom Group Nordic AB
• AS56700 Osterakers Kommun
• AS60184 OCTN Networks AB

Routing security

• RPKI: 17 valid, 0 invalid and 7 not-found announcements; 19 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 25 route objects.
• Listed in as-sets: AS-IPO-COMRADES, AS-TEKNIKBYRAN.