asn.dev

Autonomous system

AS51815 TEKNIKBYRAN

Unclassified APNIC

IPv4 addresses 14.34K 17 prefixes
IPv6 prefixes 7 counted as prefixes, not addresses
Countries 1 mostly SE
Exchanges 0 recorded by PCH
Upstreams 1 6 downstream
Flagged prefixes 0 none

Summary

Teknikbyran

Sweden · AI-generated

isp cable dsl sweden

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. 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, 6 downstream and 9 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3399Obenet AB1,200

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 17 prefixes · 14.34K addresses IPv6 7 prefixes

CountryNamePrefixes
SESweden24

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS51815
Registry name
TEKNIKBYRAN
Registrant
KUSTBANDET-MNT
Abuse contact
registry@kustbandet.com
Registered
2011-01-12
Last changed
2026-07-08
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
71% valid · 17 valid, 7 with no ROA
ROAs
19 authorising AS51815
ASPA
no ASPA record
IRR
100% registered · 24 of 24 announcements
Route objects
25 naming AS51815

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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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